Police - 1142 Words

POLICE: HISTORY Throughout the history of civilization, societies have sought protection for their members and possessions. In early civilizations, members of one s family provided this protection. Richard Lundman has suggested that the development of formal policing resulted from a process of three developmental stages. The first stage involves informal policing, where all members of a society share equally in the responsibility for providing protection and keeping order. The second stage, transitional policing, occurs when police functions are informally assigned to particular members of the society. This stage serves as a transition into formal policing, where specific members of the community assume formal responsibility for†¦show more content†¦Under this system, citizens were appointed with the responsibility of maintaining order and controlling crime. Men were formed into groups of ten, called a tything. Ten tythings were grouped into a hundred and were supervised by a constable. Gro ups of ten hundreds created a shire, controlled by reeves. The word shire-reeve is the derivative of our current term sheriff (Uchida). In 1215, King John was forced to sign the Magna Carta, a document that guaranteed basic civil rights to citizens. The rights guaranteed under the Magna Carta limited the power of the throne and their appointees, and greatly contributed to many of the liberties citizens of England and America enjoy today. During the 1500s, England increased its participation in world trade and through the 1700s more citizens moved into the cities and crime began to rise. Although England had one of the harshest criminal justice systems of its time, including death sentences for minor crimes, crime and disorder continued to rise. Many began to hire their own private police, and the king began a system of night watch for the large cities. In 1737, the first formal taxation system for the purpose of law enforcement was introduced. City councils were allowed to levy taxes to pay for a night watch system (Gaines et al.). Despite these efforts, crime continued to rise and the need for a different system of policingShow MoreRelatedPolice Enforcement And The Police1483 Words   |  6 Pagesabout the police and they feel they should be afraid of the police rather than feel protected by the police. Dr. King once wrote that â€Å"When you have seen hate-filled policemen curse, kick, brutalize, and even kill yo ur black brothers and sisters with impunity, you express a great deal of anxiety over our willingness to break laws† (King 5). Seeing what police officers are capable of, not feeling any guilt or remorse of what has been done, changes the perspective of how people view the police departmentsRead MorePolice And Police Brutality1331 Words   |  6 Pagesquestioning if they will ever be safe in the streets again. Not everyone in the world is a criminal, but it only takes one person to ruin and blame the whole race. Police brutality is an everyday case and there has yet nothing to be done to help reduce nor stop the violence. Often people critic the duty and the responsibilities that a police officer has in this county. Their duty is far from just eating donuts and drinking coffee. The first thing someone does when they feel like their life or someone’sRead MorePolice Brutality And The Police1337 Words   |  6 PagesPolice brutality is seen as a real problem in America t oday. What people do not seem to realize is that the police carry a massive burden each day. The work that officers do has the potential to be very demanding and sometimes involves dangerous situations. In these situations the officers are in the position where they may be required to use force to gain control. The continuum of force dictates the level that is most appropriate for the situation. Most people do not realize that is not the officersRead MorePolice Brutality And The Police800 Words   |  4 Pagesrecent shooting death of Michael Brown in Ferguson, MO and the resulting riots, the aggressive actions taken by police units has been pulled back into the spotlight, and law enforcement’s right to use force has been drawn into deep debate. People are angry and cannot seem to understand why the police use force when and where they do. The have come to equate the use of force with police brutality when in reality it is a system of steps that are designed to protect innoce nt bystanders from potentiallyRead MorePolice737 Words   |  3 PagesBecoming a Police Officer Keisha Elliott CJA/214 May/114/2012 Jeremy Leach Elliott Becoming a Police Officer The act of communicating is a universal practice shared and used by all human beings. It is so universal that it holds true to many different definitions of its meaning. The act could be defined as the expelling of thoughts into words to transmit information to another person. Communication exists between two or more individuals to share information, ideas, thoughts orRead MorePolice Forces And The Police Force817 Words   |  4 PagesBaltimore police force is provided with more resources than a small town police force. The wire showed how provided the Baltimore police was. In the wire it showed how the media turned the murder case into a drug case. When the media got involved the police chief made a new drug task force to fix the problem. This drug task force was made of people in different departments of the Baltimore police. It shows how the Baltimore police force can spared people for a new program. When this drug force startedRead MorePolice Officers And The Police Enforcement9 39 Words   |  4 PagesThe psychologist serves a great purpose in the law enforcement as well. The police psychologists provide services that are used to counter police use of excessive force. The psychologists are there to characterize the types of officers who are known to abuse force and to recommend psychology-based intervention that could help police managers reduce cases of excessive force. Some think that the police departments should rely mostly on pre employment screening to identify violence-prone candidatesRead MorePolice Administration Of The Police Essay1816 Words   |  8 Pages Police Administration Destinee Francis September 25, 2016 Table of Contents I. Introduction A. Earlier organization of the police force B. Sir Robert Peel C. The three eras of policing II. Policing Today A. Different Technology with Policing III. Conclusion IV. References Introduction The earlier development of the law enforcement was developed by a man named Sir Robert Peel also known as the â€Å"Father of Modern Policing† (Bennett Hess, 2007). He was bornRead MorePolice Effectiveness And Police Performance1302 Words   |  6 Pagesthe British Police are held to account, and will touch upon the paradox of police governance, the balance of unwanted coercion of police, financial stewardship and police legitimacy. This essay will also divulge into a discussion on the topic; is policing political? There will be an argument for and against, and the advantages and disadvantages to both sides will be conversed to achieve an accurate conclusion. In addition this essay will start by portraying the significance of Police AccountabilityRead MorePolice Enforcement And The Police Agencies1609 Words   |  7 PagesIntroduce: I think we all can agree that the police agencies, image has been ruined in every way you could possibly think of. I truly believe that no one honors the police agencies anymore. As technology has enhance over the years, far as cell phones, people are able to see what police officers are really doing while on the force. There have been many video release when police brutality was reveal, as well as how the police agencies respond to an incident. Over the years, community policing has

Ancient Rome And Ancient China - 939 Words

Ancient Rome and Ancient China were two different civilizations with very different yet very similar ways of life. Culture, religion, and more importantly, politics, helped make life the way it was for those who lived in ancient rome and ancient china. Politics were what made everything function, just as it does today. Politics is what was responsible for the wars that took place between civilizations, and why dynasty’s fell and why new ones rose right after. Politics were the backbone holding up each civilization. Due to China and Ancient Rome rising during separate times, their rulers, the laws the had to be followed, and how social ranking affected politics. Many things were different between Ancient Rome and Ancient China The first†¦show more content†¦The leadership roles that started out these civilizations were very different and some more influential than others. In Ancient China and in Ancient Rome the law, just as the politics were different. In Ancient Ch ina some of the laws were respecting your parents, and others were the penalties for committing crimes, such as death from robbery. In China unlike rome, the women weren’t treated that well. A law for women was, If a girl insulted her parents he would be strangled. Some other punishments in the law were very intense, such as burning the cheeks of criminals which would leave a scar the rest of their lives. Many of the crimInal Ancient Rome the laws were under The Twelve Tables. The laws included in The Twelve Tables were much more strict and supposed to be â€Å" an eye for an eye† which meant that the punishment for the crime was supposed to be equal to itself. Some laws included were Marriages should not take place between plebeians and patricians, If the theft has been done by night, if the owner kills the thief, the thief shall be held to be lawfully killed, and If anyone summons a man before the magistrate, he must go. If the man summoned does not go, and let the one summoning him call the bystanders to witness and then take him by force. Rome would bribe many people with a citizenship in exchange for their loyalty for the ruler and for the law.Show MoreRelatedComparing The Great Ancient Figures Of Ancient China And Rome1171 Words   |  5 Pagespresentation on why Ancient History is a great riveting subject to do in your senior years of education. This will be done through the comparison of two great ancient figures of ancient China and Rome. You will learn how the history of the great’s impact the modern society we see today, as Theodore Roosevelt once said ‘the more you know about the past, the better prepared you are for the future’. (Next slide) Spartacus The first ancient figure I will be talking about hails from Ancient Rome and was one ofRead MoreWomen of Ancient Rome and China Essay2040 Words   |  9 PagesWomen of Ancient Rome and China Women in ancient Rome and China were very different but quite similar as for as their treatment and roles were concerned. In both cultures they were under the protection of their fathers until they married. When they married they were to stay home and be wives, they were not formally educated and learned to manage their households. They were not allowed to disgrace their families in any way and were inferior to men from the moment of birth. Chinese women whetherRead MoreWomen of Ancient Rome China805 Words   |  4 PagesThe empires of Rome and China were very great ones, they both had many similarities and differences in the way they ran their empires. One major difference was the way they treated their women. Both Chinese and Roman women were unequal in social status than the men of the empires were, but they were definitely treated different in both empires. Women of China were treated quite harshly and were expected to take orders at all times by their husbands, and were to ser ve them always. This started toRead MoreDifferences in Ancient Rome and Han China944 Words   |  4 PagesHan China and Classical Rome When comparing Han China and Classical Rome, many political, geographical, and religious similarities can be found, though many differences are also prevalent. Though Roman and Han political structures both emphasized bureaucracies, they came to them quite differently. Through copious amounts of expansion, both societies spread culture and earned money, though expansion was eventually their downfalls. Their religions differed immensely, with Rome emphasizing polytheismRead MoreClassical Civilizations of Ancient Greece, Rome, and China Essay897 Words   |  4 Pagesthere have been many civilizations, empires, colonies, and tribes that have impacted the world. The civilizations of Greece, Rome, and China have done this, but what sets them apart from the others is their lasting significance and lasting impact they had on the world. For this reason, they are considered classical civilizations. To describe how Greece, Rome, and Han China are classical, there are three systems that are u sed; these are Economic, Social, and Political. Out of these three classicalRead MoreAn Analysis of Art in Ancient China, Rome, and Northern Europe2290 Words   |  9 PagesAn Analysis of Art in Ancient China, Rome, and N. Europe Introduction One thing is permanent about art throughout the ages and civilizations of time: it always expresses some aspect of the culture that produced it. So it may be seen in Renaissance Italy in Michelangelos David, or in Hellenistic Greece in the Dying Gaul. The Egyptian statue of Anubis reveals something about the spiritual belief of those ancient people, and the abstract expressionism of Kandinsky in the 20th century representsRead MoreWomen Of The Roman Empire1022 Words   |  5 PagesIn the Roman Empire, and in most ancient societies, the role and status of woman has been obscured by the bias of ancient male writers. Just as women are viewed in ancient Greece, and Imperial China, women in the Roman Empire were viewed as inferior to men. In the Roman Empire it was believed that women should be under the control of a guardian, which controls the aspects of her life. This guardian could be her father, husband, or a male relative (Nystrom). Marriage in the Roman Empire was not romanticRead MoreChina vs. Rome Compare and Contrast1390 Words   |  6 PagesChina and Rome China and Rome were astonishing civilizations that managed to advance technology and civilations. Both civilizations were rapidly growing and making changes to the world. The two cultures were pretty similar, yet very different. Their religions were something to be modest about. When it came to religion it helped the decline of both societies, by religion changing. When it came to technology though, its change is what caused the societies to flourish. As for education the bothRead MoreAttitudes of War in Ancient Civilizations1039 Words   |  5 Pageswar in both ancient Rome and China. These attitudes prove that in these cases perhaps it is safe to say that wars are not inevitable or natural but were caused by warlike societies and social situations. After reading bits and pieces of both the ancient Roman and Chinese history, one can only gain a greater perspective on how these attitudes derived. In 391 nomads called the Gauls defeated a small army of Roman aristocrats and bur nt down the town of Rome. After this attack, Rome rebuilt its townRead MoreCompare And Contrast Rome And Han Empire1342 Words   |  6 PagesOver the last three centuries, Rome and the Han Dynasty were successful in their expansion throughout their respected parts of the world. Although both ran a very similar government, both successful civilizations did so using different methods. The Han would govern using imperial rule in addition to the Analects of Confucianism to run their political ideology. The Han Dynasty would eventually even change the text of the Analects per how they ruled through the original tablets. The Roman Empire would

A Big Threat to Brokerage Firms Free Essays

These days, frauds and scams are observably rampant. In business, on the Internet, in the bank and any entity where money may be extracted. Brokerage firms and hedge funds never escaped this reality and these firms too are very susceptible to frauds and this fact is considered as a big threat upon the health of the financial market. We will write a custom essay sample on A Big Threat to Brokerage Firms or any similar topic only for you Order Now Hedge funds are currently among the most popular or hottest type of investment prospects in the stock market these days. This type of investment â€Å"have been very prominent in the financial news, attracting a lot of attention from investors, brokerage firms, the Securities and Exchange Commission or SEC† (Evans, Atkinson, and Cho 2005) Brokerage firms on the other hand have investment advisors and stockbrokers which are pack with information needed to be relayed to the investors. In this manner, if they are having plans to defraud and manipulate the information they have, which is a very unethical act, they actually can. The aforementioned hedge funds and brokerage are very susceptible to fraud caused by unsuitable investments. These unsuitable investments happen when the representative broker of the firm make misrepresentations of the investment to a customer or if this broker agent fall short in disclosing â€Å"to the customer all of the material facts about the investment† (Stoneman and Schulz) In short, this is a fraud, which, the common people also identify as a lie. Fraud is either lying or omitting something and according to the SEC, under Rule 10 (b) (5), employing any scheme, artifice or device defrauding someone or some entity constitute fraud or making untrue statements of material fact making the statement made, in light of the circumstances under which they were made, not misleading is another way to defraud. Moreover, engaging in any act, practice or course of business which operate or would operate as a fraud or deceit upon any person or entity in connection with any purchase or sale of any security. Even though wealthy investors in the hedge funds consider the occurrence of fraud to be insignificant, it is currently happening â€Å"too often to be ignored† (Guarding Against 2005) In fact for the past five years prior March 2005, there were already a total of fifty-one (51) fraudulent hedge fund cases with investor losses of approximately $ 5. 1 billion. One very popular type fraud in hedge funds was invented as early as 1919 called the Ponzi Scheme after Carlo Ponzi who first utilized this method. With this type fraud, the fund manager maintains the fiction that the fund is performing very well and is generating returns while it encourages new investor to invest and using their investments to pay off those earlier investors at a higher rate rather than investing the amount. On the side of the brokerage firms, they are the ones leaking the information to investors leading to fraud. In fact, the SEC alleged that brokerage firms recruited new investors for hedge funds from their clients (a technique known as â€Å"capital introductions. † (Evans, Atkinson, and Cho 2005) General fraudulent brokerage firm practices include stock marker manipulation to benefit a certain individual or entity; utilizing phony accounts in trading in the stock market; trading without the public’s information; doing trades that are unauthorized; refusing to customers’ sell orders; and falsifying firm’s records. Furthermore, more defined types of brokerage fraud (Brokerage Fraud, 2008) include (1) biased investment advice; (2) unfounded advice; (3) contradictory investment advice; (4) continuing a risk; and (5) conflict of interest. Each of these five portrays manipulation by the firm, taking its advantage as the advisor in influencing the decision of the customer in an unorthodox manner. As early as 2004 the SEC has been requiring brokerage firms to present relevant information stating the ways on how they help the hedge funds recruit new investors in order to prevent fraudulent fund raising. The SEC is also investigating selected cases to draw information from them and from which hedge funds might have used insider information to their ends and thereby gaining profit. This is especially true on initial public offerings (IPOs) This is according an article entitled Guarding Against Hedge Fund Fraud issue number 3 of the Trusting the Independent Financial Advisor Journal. The SEC advices the brokerage firm in order for them to stay within the rules and will not be penalized. This advice includes (1) fair dealing; (2) best execution; (3) customer confirmation rule; and (4) disclosure of credit terms. These general rules are embedded in the SEC’s Compliance Guide to the Registration and Regulation of Brokers and Dealers. Simply stated, the SEC and the American government in general do not want to have another Merrill Lynch, Salomon Smith Barney, Morgan Stanley or Bear Sterns deceiving the public. . Works Cited Evans, Thomas G. , Stan Atkinson, and Charles H. Cho. 2005. Hedge Fund Investing: Current Advice for Financial Advisers and Planners. Journal of Accountancy 199, no. 2: 52+. Morgenson, Gretchen. â€Å"Brokerage Firm Is Indicted In Fraud Case. † The New York Times, July 9, 1999, from http://query. nytimes. com/gst/fullpage. html? res=9E02E2D8143CF93AA35754C0A96F958260. National Legal News â€Å"Brokerage Fraud. † 2008 from http://www. lawyershop. com/news/practice-areas/criminal-law/white-collar-crimes/securities-fraud/brokerage-fraud/. Stoneman, Tracy P. and Douglas J. Schulz. 2002. California: Kaplan Business Publishers The Securities and Exchange Commission. â€Å"Litigation Briefs. †2008 from . http://www. sec. gov/litigation/briefs/homestore_020405. pdf. Trusting the Independent Financial Advisor Journal. â€Å"Guarding Against Hedge Fund Fraud† issue number 3. March 2005, Switzerland: Roland Ray. How to cite A Big Threat to Brokerage Firms, Papers

Leukemia Essay Summary Example For Students

Leukemia Essay Summary Leukemia is a disease characterized bythe formation of abnormal numbers of white bloodcells, for which no certain cure has been found. Leukemia is also conditions characterized by thetransformation of normal blood-forming cells intoabnormal white blood cells whose unrestrainedgrowth overwhelms and replaces normal bonemarrow and blood cells. Leukemias are namedaccording to the normal cell from which theyoriginate, such as Lymphocyte Leukemia. Lymphocyte Leukemia is where a Lymphocytecell is transformed into a Leukemia cell. Anotherexample of Leukemia is Myelocytic or(Granulocytic Leukemia). This forms when aMyelocytic cell is changed or transformed into aLeukemia cell. Different Leukemias are located inthe microscope and by how much protein theycontain. These Leukemias are usually very severeand need treatment right away. The presentincidence of new cases per year in the UnitedStates is about 25 to every 100,000 persons. Thedanger to the patient lies in the growth of theseabnormal white cells, which interfere with thegrowth of the red blood cells, normal white bloodcells, and the blood platelets. The uncontrolledgrowth of the abnormal white cells produces atendency to unstop bleeding, the risk of gettingserious infection in the wounds, and a very smallpossibility of obstruction of the blood vessels. Treatment of these Leukemias includechemotherapy with alkylafing agents, orantimetabodies that suppress the growth ofabnormal white cells. Another treatment of somekind would be the x-ray or the administration orradioactive substances, or radiophosphorus, maybe used. After treatment these diseases may lastfor many years. Age of the person diagnosed withLeukemia does play an important part in how thatindividual responds to any treatment. The older theperson the less response he may have totreatment. Leukemia in Animals white blood cellsis much less common as Leukemia in humanswhite blood cells. Todays treatment mostlyincludes chemotherapy and or bone marrowtransplantation supportive care, where transfusionsof blood components and prompt treatment ofcomplicating infections, is very important. Ninetypercent of children with Acute LymphocyteLeukemia have received chemotherapy and fiftypercent of theses children have been fully cured ofLeukemia. Treatment of AML or AcuteMyeolcytic Leukemi a is not as successful but hasbeen improving more and more throughout the1990s. Scientists that study the cause ofLeukemia have not had very much success lately. Very large doses of x-rays can increase theefficacy growth of Leukemia. Chemicals such asBenzene also may increase the risk of gettingLeukemia. Scientists have tried experiments onLeukemia in Animals by transmitting RNA into thebody of the Animal. Interpretation of these resultsin relation with human Leukemia is very cautious atthis time. Studies have also suggested that familyhistory, race, genetic factors, and geography mayall play some part in determining the rates ofgrowth of these Leukemias. Stewart Alsop is anexample of Acute Myeoblastic Leukemia, orAML. On the day of July 21, 1971 Stewart wasmade aware of some of the doctors suspicionsdue to his bone marrow test. He was told by hisdoctor in Georgetown that his marrow slideslooked so unusual that he had brought in otherdoctors to view the test and they could not cometo an agreement so they all suggested that he takeanother bone marrow exam. The second test wasknown to be hypocelluar meaning that it hadvery few cells of any sort , normal of abnormal. The Georgetown doctors counted, aboutfourty-four percent of his cells were abnormal, andhe added, with a condor that he later discoveredcharacteristics. They were ugly-looking cells.Most of them looked like Acute MeyoblasticLeukemia cells, but not all some of them lookedlike the cells of another kind of Leukemia,Acatymphoblastic Leukemia, and some of themlooked like the cells of still another kind of bonemarrow cancer, not a Leukemia, it is calledDysprotinemia. And even the Myeloblastic cellsdidnt look exactly like Myeloblastic cells shouldlook. Stewart has been treated with chemotherapyand is still living today but he doesnt have verymuch longer to live. Sadako Saski was born inJapan in the year of 1943 she died twelve yearslater in the year of 1955 of Leukemia. She was inHiroshima when the United States Air Forcedropped an atomic bomb on that city in an attemptto end World War II. Sadako Saski was only twoyears old when all this had happened. Ten yearslater, Sadako had been diagnos ed with Leukemiaas a result of the radiation from the bomb. At thistime Sadako was only a twelve year old little girland she died of Leukemia. Everyday Sadakogrew weaker and weaker thinking about her deathand the day finally came. Sadako died on October25, 1955. Sadako was very much loved by all ofher classmates. At the time of death, herclassmates folded 356 paper cranes to be buriedwith her. This is a symbol in Jpan ofthoughtfulness. In summary to what I have learnedabout Leukemia it is a very painful disease. Thepeople with Leukemia suffer very much throughoutthe disease and treatment of the disease, even ifthey are eventually cured. The treatment ittook to get there was very painful. The studies ofLeukemia have helped alot of people to be curedbut there are still alot of people suffering due to nocure found to help them. Im sure like all othercures needed, the money is short funded for theresearch that cost so very much. Maybe somedaysoon, we hope, they will find a cure for al l kinds ofcancer.

Dreams Essays (275 words) - Psychotherapy, Symbols, Dream

Dreams Dreams, why do we dream. I thing we dream because we are thinking while we are sleeping and our brain puts those thought into a weird movie in our head. Some people think dreams are the keys to lifes problem. They say in your dreams there are symbolic things that mean something different. I don't know about all that but it has some truth behind it. In the dream journal I had a whole bunch of dreams that didn't make much sense. They are hard to write down. But in my day dream journal I can usually control my day dreams, and they make more sense. My day dreams and night dreams are not the same at all because my day dreams make sense and my night dreams don't. Like for example, in my day dream journal I basically dream about stuff I would like to do. But in my night dreams I do a bunch of stuff that I would never do. As for the theories that explain why we dream I don't think the books really apply to mine because my dreams are weird and make no sense. I think that when I go to sleep my brain is still awake, and it is sending off thoughts at random. And then it puts them together to try to make sense of it. Sometimes it makes sense, but usually they end up all messed up. In conclusion I feel that we dream because our brains send off thoughts at random while we sleep and out brains put those thoughts into a movie, that for me never makes sense. My day dreams are nothing like my night dreams, because my day dreams are more realistic and make sense and my night dreams don't.

Free Essays on Gwendolyn Brooks

Writing with uncommon strength, Gwendolyn Brooks creates haunting images of black America, and their struggle in escaping the scathing hatred of many white Americans. Her stories, such as in the "Ballad of Rudolph Reed", portray courage and perseverance. In those like "The Boy Died in My Alley" Brooks portrays both the weakness of black America and the unfortunate lack of care spawned from oppression. In "The Ballad of Chocolate Mabbie" Brooks unveils another aspect of her skill by entering the domestic arena with the lingering limitations imposed by prejudice. These aspects, such as strength and finesse, are among Brooks great attributes. Worthy of exploration, Brooks powerful and haunting techniques can be separated and explored in the above mentioned poems. Each work contains a specific tactic, which effectively promotes her ideas. It is for that reason, tactics mixed with ideas, which have placed Brooks among the finest poets. Perhaps because of Brooks' use of a stiff format, "The Ballad of Rudolph Reed" may be her strongest work. Imbuing the poem with incredible lines and description, Brooks transforms Rudolph Reed, who is the character the poem is built around, into a storybook hero, or a tragic character whose only flaw was the love he held for his family. Brooks creates a strong, solid character who is more than another fictional martyr, but a human being. The Finesse she imbued in this work from the first stylized stanza: "Rudolph Reed was oaken. His wife was oaken too. And his two girls and his good little man Oakened as they grew." (1081, 1-4) Here brooks' symbolic use of the word oakened, coupled with the use of a rhyme scheme of the second and last sentence of every stanza causes the reader to more deeply feel what the character and his family are going through. Using the idea of a dream home, Brooks stabbed to the heart of the American dream and where those of African descent fit into it. Eve ry person, man or woman, h... Free Essays on Gwendolyn Brooks Free Essays on Gwendolyn Brooks Writing with uncommon strength, Gwendolyn Brooks creates haunting images of black America, and their struggle in escaping the scathing hatred of many white Americans. Her stories, such as in the "Ballad of Rudolph Reed", portray courage and perseverance. In those like "The Boy Died in My Alley" Brooks portrays both the weakness of black America and the unfortunate lack of care spawned from oppression. In "The Ballad of Chocolate Mabbie" Brooks unveils another aspect of her skill by entering the domestic arena with the lingering limitations imposed by prejudice. These aspects, such as strength and finesse, are among Brooks great attributes. Worthy of exploration, Brooks powerful and haunting techniques can be separated and explored in the above mentioned poems. Each work contains a specific tactic, which effectively promotes her ideas. It is for that reason, tactics mixed with ideas, which have placed Brooks among the finest poets. Perhaps because of Brooks' use of a stiff format, "The Ballad of Rudolph Reed" may be her strongest work. Imbuing the poem with incredible lines and description, Brooks transforms Rudolph Reed, who is the character the poem is built around, into a storybook hero, or a tragic character whose only flaw was the love he held for his family. Brooks creates a strong, solid character who is more than another fictional martyr, but a human being. The Finesse she imbued in this work from the first stylized stanza: "Rudolph Reed was oaken. His wife was oaken too. And his two girls and his good little man Oakened as they grew." (1081, 1-4) Here brooks' symbolic use of the word oakened, coupled with the use of a rhyme scheme of the second and last sentence of every stanza causes the reader to more deeply feel what the character and his family are going through. Using the idea of a dream home, Brooks stabbed to the heart of the American dream and where those of African descent fit into it. Eve ry person, man or woman, h... Free Essays on Gwendolyn Brooks Although she was born on 7 June 1917 in Topeka, Kansasthe first child of David and Keziah BrooksGwendolyn Brooks is "a Chicagoan." The family moved to Chicago shortly after her birth, and despite her extensive travels and periods in some of the major universities of the country, she has remained associated with the city's South Side. What her strong family unit lacked in material wealth was made bearable by the wealth of human capital that resulted from warm interpersonal relationships. When she writes about families thatdespite their daily adversitiesare not dysfunctional, Gwendolyn Brooks writes from an intimate knowledge reinforced by her own life. Brooks attended Hyde Park High School, the leading white high school in the city, but transferred to the all-black Wendell Phillips, then to the integrated Englewood High School. In 1936 she graduated from Wilson Junior College. These four schools gave her a perspective on racial dynamics in the city that continues to influence her work. Her profound interest in poetry informed much of her early life. "Eventide," her first poem, was published in American Childhood Magazine in 1930. A few years later she met James Weldon Johnson and Langston Hughes, who urged her to read modern poetryespecially the work of Ezra Pound, T. S. Eliot, and e. c. cummingsand who emphasized the need to write as much and as frequently as she possibly could. By 1934 Brooks had become an adjunct member of the staff of the Chicago Defender and had published almost one hundred of her poems in a weekly poetry column. In 1938 she married Henry Blakely and moved to a kitchenette apartment on Chicago’s South Side. Between the birth of her first child, Henry, Jr., in 1940 and the birth of Nora in 1951, she became associated with the group of writers involved in Harriet Monroe's still-extant Poetry: A Magazine of Verse. From this group she received further encouragement, and by 1943 she had won the Mid...

Evaluation of a company Essay Example | Topics and Well Written Essays - 1750 words

Evaluation of a company - Essay Example Our company needs a strong investment to protect its future positions. For The Growth of company has been in growing shape in Europe. However, in this document we will strive for better option of expansion such as merger viability or acquisition of an existing corporation or developing its own plant in UK to start operations in paint technology. Strategic viability has also been assessed about expansion plan. The company envisions maintaining valuable position by its customers, community they serve and committed staff and shareholders. Company aims to transform itself into innovative organization and serve with up to date infrastructure support. Working capital may be financed through short term loans which may not be a burden in terms of finance costs. It will also help to maintain liquidity positions of company. Another way out could be availability of Overdraft from bank on negotiable terms. Chamberlain, K. A. (2011). à ¢Ã¢â€š ¬Ã…“Lawfully Made Under This Titleà ¢Ã¢â€š ¬Ã‚ : The Implications of Costco v. Omega and the First Sale Doctrine on Library Lending. The Journal of Academic Librarianship, 37(4), 291-298. Hanna, J. (2013). Real-world application of MedsCheck opportunities: The Costco pharmacists intervention trial for reduction of cardiovascular risk. Canadian Pharmacists Journal / Revue des Pharmaciens du Canada, 146(6), 325-328. Minahan, S. M., Huddleston, P., & Bianchi, C. (2012). Costco and the Aussie Shopper: a case study of the market entry of an international retailer. The International Review of Retail, Distribution and Consumer Research, 22(5), 507-527. Hooper, C., & Gunn, R. (2013). Recognition as a framework for ethical participatory research: developing a methodology with looked after young people. International Journal of Social Research Methodology, I,

Unemployment Within the Labour Market is Primarily Voluntary Essay

Unemployment Within the Labour Market is Primarily Voluntary - Essay Example Unemployment within the Labour Market is primarily voluntary Macroeconomics is a discipline that entails structure, performance and behavior of the economy as a whole.Conversely, microeconomics is a discipline that puts emphasizes on the market behavior of individuals, consumers and organisations in the efforts to understand the decision making process of organisations and households. It is concerned with the relations of individual buyers and sellers. Both macro and micro economics play a great role pertaining to unemployment in the world especially in the United Kingdom (Wyplosz and Burda 2009) The connection between these two disciplines and policies has led to constant media attention as well as a central role in political debate (Price and Chrystal 1995). The recent slow down in the economic activity in, U.K, has raised new issues over the unemployment policy with clear evidence of failure of economic policies adopted since the election of the current government. Though there has been growth over the past few days, very little has been do ne in the reduction of unemployment. Concepts such as human and social capital have been used as the basis of analysis into this predicament. The recent certified data on a market research in the UK market shows a great drop in the unemployment although the labour market still remains extremely weak. Elevated unemployment combined with squat growth in pays is certain to persist on the economic trend in the coming days. According, to Bade and Parkin 1983, the labour survey measure by the government there has been a notable decline of rates in jobless from 16-year high of 8.4% to 8.3% in the last three months giving way to an improved labour market. ... e government there has been a notable decline of rates in jobless from 16-year high of 8.4% to 8.3% in the last three months giving way to an improved labour market. The vacancies data has also fallen as it casts doubt on whether the private sector is in a position to recruit a sufficient number of people to balance the increased rates of unemployment being experienced in the public sector. Toting up, the inflation runs at 3.5% thus affecting the pay growth that has dropped to a large extent leading to a lug on the spending of consumers and the growth of the economy though the lug is much less compared to the previous years (Taylor 2000). Concepts Human Capital and Social Capital Human capital concept denotes elaboration of the metaphorical statement, which states that education is the investment in the future. As a rule, the analytical tools that are applied to investments in this capital include a measure of stocks and rates of return to investments. This may as well be extended in order to verify the skills and knowledge applicable to an individual’s experience in the labour market (Christos 2005). Analysis carried out on the long term unemployment has proved that work experience is related to the growth of human capital. In addition, long periods of joblessness could lead to a fall in human capital, which is also known as skill atrophy. Likewise, skills can be corroded if they are not put to practice while knowledge becomes outdated if it is not updated. Thus, employment could be related to a particular set of adopted behaviours and attitudes, which include communication, punctuality, dressing mode and so on. The main effect of erosion on such behaviours is connected to prolonged unemployment (Nadiri and Arango 1981). On the other hand, Lewis and Artis 1991

Cash flow analysis Essay Example | Topics and Well Written Essays - 3750 words

Cash flow analysis - Essay Example The company sells its products online and also through merchants. Other products and services the company provides are; server and storage software, Microsoft Dynamics and video game consoles. It’s also involved in mobile software production; recently they purchased Nokia Handset Business. Without doubt the Microsoft company is one among the leading companies in its industry. A common size financial statement shows all items as percentages; this enables easy analysis over a given time. A common analysis from 2011 to 2014 was made. This analysis illustrated a decrease in the profits made over those three years. On the other hand an increase in the cost of sales over this period was observed. The operating cost remained the same over this period of time. The provision of 7% total sales was constant. The net income as in june 2014 was 25.42% which was a decrease, in 2013 net income was 28%, 2012 was 23%, while 2011 was 33%. A statement for the those three years tells us that cash and cash equivalents ant the current assets have increased slowly over time. On a different observation for the same period, there was a decline in terms of the long term assets of the company related to the decline in goodwill. In 2011 to 2014 the current and long term liabilities have held constant. There has been a decline from 47 to 44% in the total liabilities of the company w hile the stockholders’s equity has increased over that period from 52 to 55%. The financial statement provides information regarding the prospect earnings capacity of a corpoartion’s assets over and above an indication of cash flows which might come from inventories and receivables . the figures in the table is in USD $ in millions and was adopted from Microsoft Corporation, the annual reports Ratio analysis for this period was done to get an indication of the company’s financial performance in

Importance of the Great Exhibition of 1851

Importance of the Great Exhibition of 1851 Provide some details of the Great Exhibition of 1851, and say why it was so important. The Great Exhibition of 1851 was the world’s first world exposition. The Great Exhibition of 1851 was an international exhibition that took place in Hyde Park, London. The 1851 was means the years and The Great Exhibition of 1851 was from 1 May to 11 October 1851. The Great Exhibition of 1851 was mainly focus on the worlds cultural and industrial technology. In The Great Exhibition 1851, Britain wanted to tell all of the public, the success of the achievement after The Industrial Revolution, and that were to become a prevalent 19th-century feature. The Great Exhibition was enormously influential on the development of many aspects of society including art and design education, international trade and relations, and even tourism. The Great Exhibition 1851 was organized by Henry Cole and Prince Albert, husband of the reigning monarch, Queen Victoria. The aim of this activities was to celebrate the new trend of modern industrial technology and design. Maybe due to the Prince and the Queens aides very enthusiastic to promote this fair can be profitable, finally persuaded the British government on January 3, 1850 Royal Commission was set up to organized the Expo 1851, Accordingly greatly enhance the feasibility of the plan, and this committee Britain was included most prestigious engineers Isambard Kingdom Brunel. The Crystal Palace was very important for the Great Exhibition of 1851. Joseph Paxtons design is inspired by the Amazon water lily Victoria, found the water lily can support huge leaves, when Joseph Paxton checking underneath, there are radiation-like elongated blade support ribs hard to obtain a design inspired, and application in architecture. Joseph Paxtons plan for the garden, fountains, terraces, small waterfalls and other skills was very good, in this Crystal Palace have many elm was planted, acreage approximately nine acres. The Crystal Palace also has a lot of small fountains and waterfalls, the highest up to 250 feet height, initial water tower construction as load-bearing problems and collapse, after deliberations , the two powerful towers, is divided into three reservoirs, namely the north and the south end of the place, as well as the central part of the garden, to spread the weight. The main idea is to find the power structure, durability, simplicity and speed. Firstly, The Crystal Palace was a famous building in the Great Exhibition of 1851, The Crystal Palace was made by iron and glass. The building used the area of nine hundred thousand square feet, the equivalent of eighty-four thousand square meters of glass or eight half-standard football field. Included the iron prop have three thousand three hundred, Iron beams two thousand three hundred and covers seventy-four thousand square meters, width and length are about 408 feet, 1851 feet equivalent to 125 meters, 564 meters, has around 3-story building. This is a very extensive building in 19th-century. Secondly, This design and building were very fashionable and originality on 19th-century. Since It is an important symbol of the Industrial Revolution, it was originally pavilion for the first time in 1851 World Expo held in London, the official name of this World’s Fair Exposition of Great Exhibition of the Works of Industry of all Nations. In five months, from May to October 1851, six million visitors throng the gigantic trade show, marveling over the latest technology as well as displays of artifacts from around the world. Until to 1936, the Great Exhibition had previously attracted numerous various social classes of tourists come to visit. Thirdly, World Expo visit year only six months, the building was supposed to be disposed. But but the final decision was made to subvert by parliament, Within two years, meet again by Queen Victoria opening ceremony this was long-term exhibition, for London, especially the addition of the two railway stations. this is one of the still running Crystal Palace railway station now, another station is the gateway to the parade area, today all of the passengers can still see its Italian style mosaic roof. Finally, Among the exhibits, almost every Victorian’s generation left are surprising for the visitors, there are included pottery, porcelain field, iron factories, steam hammer, hydraulic, perfume, pianos, houses, diving gear, guns, barometers, Textiles and fireworks etc. On the other hand, The Crystal Palace was have a lot other problems to affect contemporary design and develop the building. Firstly, in the items of the materials, the traditional earth, wood, brick, stone was replaced by iron and glass. Although is not of the first to used iron as a building material, however, used the iron prefabricated frame was unprecedented. Its effects open to suspicion since it is a unprecedented case, they can not have a successful case to support they when they are develop the building. Secondly, in terms of construction, traditional brick and stone stack technology is rivet, sleeve and screw fittings, fasteners replaced as the house as a machine to install. It is an unsafe practice as the Crystal Palace has around 3-story building and mainly items of the materials were a iron and glass, the Crystal Palace have a lot of visitors to visit, so the structure of the building must be very safety. Finally, In November 1936 the Crystal Palace was tragically destroyed in a spectacular fire. the Crystal Palace was made by iron and glass which are building materials. When the light from the sun is direct exposure on the Crystal Palace, it will initiate a fire and the iron is not to receive a high temperature, it is easy to become deformed. The result is the fire will spread so fast. However, Royal Exhibition Building in Melbourne, Australia Expo again inherited the London Crystal Palace style. The difference is mainly due to Crystal Palace is not a permanent building, the main materials were iron and glass, all set up was for the convenience and short-term used, was not a long-term used and was not a one of the Exhibition Building. World Expo and a number of cities in Europe after several decades of years, many of the pavilion type buildings are modeled on glass frame structure by Crystal Palace. Royal Exhibition Building is a permanent building with solid walls and roof. Until today, the Royal Exhibition Building is still standing in the Riccarton Park Melbourne. A hundred years ago, making it increasingly fascinating Victorian’s elegance. In all of the buildings in Melbourne, its influence comparable to stabilizer. In June 2004, Royal Exhibition Building was included in the World Heritage List of the United Nations, Australia has become the only ranked as the worlds cultural heritage buildings. The Crystal Palace in London had only provided a venue for the Expo exhibits show, but has become the first World Expo of the most successful works and exhibits, it not only witnessed to the infinite glory of the Victorian era has also become a symbol of the world exposition. Today, the modern city building is very fast, however, if we can careful to inquiry, we can observe many of todays building materials and methods are within from the impact of the Crystal Palace, Although The Crystal Palace was a historical buildings, yet in a different form changing Joseph Paxtons creative ideas. In this sense, the Crystal Palace is still alive in our side, and will long continue.

Television and Media - Censorship of TV Violence Not Necessary Essay

Censorship of TV Violence Not Necessary    Censorship of televised media often begins as a result of the concern many adults show over what their children watch. Children begin watching television at an early age, and they are usually lifetime viewers by the time they are two to three years old. There is usually a steady increase in the amount of television watched during a persons' childhood. This is followed by a decline during adolescence. What is more of a concern to the American people, however, is the amount of violence depicted on the television screen. The addition of cable TV also adds a whole new dimension to the problem. Children who watch a lot of TV are less aroused by violent scenes, less bothered by violence in general, and less likely to find anything wrong with it ( Comstock 521). A study by George Gerbner, Ph.D., at the University of Pennsylvania, enlightens this subject. His research shows that TV programs made for children typically contain over 20 acts of violence per hour. 'Children who watch the vio lent shows, even 'just funny' cartoons, were more likely to hit out at their playmates, argue, disobey class rules, leave tasks unfinished, and were less willing to wait for things than those who watched the nonviolent programs,' says Aletha Huston, Ph.D., now at the University of Kansas.      Ã‚  Ã‚   Even though many studies have been conducted on the effects of TV violence on youngsters many scientists doubt that a connection exists between these two topics. Most simply say that there is just not enough evidence available to make a definite conclusion. In the end it is up to the parents of children to make the ultimate decision of what should or should not be watched. There are several things parents ... ...rograms of historical significance, such as Schindler's List, further lessons its value.      Ã‚  Ã‚   Overall it can be said that violence is indeed prevalent on television in today's society. Some may argue that this violence is harmful to our children and must be ended, while others view the media as a form of free speech. Either way it is up to the individual to make the decision on whether a program should or should not be watched. The TV can simple be turned off or the channel changed if the program is not to a person's liking. The government should not have to do this regulation for us.    Works Cited Comstock, G. (1994). The effects of television violence on antisocial behavior: A meta-analysis. Communication Research, 21 (4), 516-546. Palmer, E.L. (1988). Television and America's children: A crisis of neglect. New York: Oxford University Press.

Edward Taylor Essay

Living during the late 1600’s, Edward Taylor lived through a time of many hardships. With the constant battles between colonists and natives going on, he lived in fear of his home and life being in jeopardy. Yet, through this terrifying time, he wrote poetry that earned him the name of the best colonial poet. Some aspects that can be looked at of his writing are his style, subject matter, and tone. The first area of his writing is his style. Edward Taylor’s style consists of both easy to understand sentences, and a fluid happy word choice that shows the loving side of god. An example of his style is â€Å"Lord clear my misted sight that I May hence view they divinity†(Taylor). This sentence shows his focus on god and word choice, and comes from his piece â€Å"Upon a Wasp Chilled with Cold†. The next area to go over of Taylor’s writing is his subject matter. The main aspects that he writes about are God and how he is gracious, and how he is evident in every day life events. This can be shown in the passage â€Å"My words, and actions, that their shine may fill My ways with glory and Thee glorify†(Taylor), from his writing â€Å"Huswifery†. He is very clear on what he wants to show and clear about his Puritan faith. Last of all the areas of Taylor’s writing is his tone. The tone of his pieces show a very happy and hoping attitude toward life. He clearly shows how he wants people to see the grace of go and how they can be forgiven, rather than the radical view of God’s wrath. This tone can be seen in the passage â€Å"Where all my pipes inspired upraise An heavenly music furred with praise† (Taylor), from his piece â€Å"Upon a Wasp Chilled with Cold†. Edward Taylor goes down as a great colonial poet for a reason, and through his work that reason is easily seen. With aspects like style, subject matter, and tone, his writing is a crisp example of how to incorporate God into poetry in a hopeful matter. Everything about Taylor, from his childhood to his adult life, portrays his amazing character and strong love towards God. His writing has surely made the impact on people that he wanted of showing people Gods grace.

Free Essays on Renaissance Art

The ‘Age of Enlightenment’ is a term used to describe the trends in thought and letters in Europe and the American colonies during the 18th century, prior to the French Revolution of 1789-1799. The phrase was frequently employed by writers of the period itself, convinced that they were emerging from centuries of darkness and ignorance into a new age enlightened by reason, science, and a respect for humanity. Of the basic assumptions and beliefs common to philosophers and intellectuals of this period, perhaps the most important was an that of there faith in the power of human reason. People came to assume that through a primitive use of reason in progress, it would be possible to progress in knowledge, in technical achievement, and even in moral values. Although they saw the church as the principal force that had enslaved the human mind in the past, most Enlightenment thinkers did not renounce religion altogether. Many opted for a form of Deism, accepting the existence of God and of a hereafter, but rejecting the teachings of Christian theology. They also felt that human life should be spent on improvement. More than a set of -1- Trevino #2 fixed ideas, the Enlightenment implied an attitude and a method of thought. During the first half of the 18th century, the leaders of the Enlightenment waged an uphill struggle against considerable odds. Several were imprisoned for their writings, and most were hampered by government censorship and attacks by the church. The later decades of the century marked a triumph of the movement in Europe and America. The enormous increase in the publication of newspapers and books ensured a wide diffusion of new ideas. Thus in the end seeing that the age of enlightenment was... Free Essays on Renaissance Art Free Essays on Renaissance Art The ‘Age of Enlightenment’ is a term used to describe the trends in thought and letters in Europe and the American colonies during the 18th century, prior to the French Revolution of 1789-1799. The phrase was frequently employed by writers of the period itself, convinced that they were emerging from centuries of darkness and ignorance into a new age enlightened by reason, science, and a respect for humanity. Of the basic assumptions and beliefs common to philosophers and intellectuals of this period, perhaps the most important was an that of there faith in the power of human reason. People came to assume that through a primitive use of reason in progress, it would be possible to progress in knowledge, in technical achievement, and even in moral values. Although they saw the church as the principal force that had enslaved the human mind in the past, most Enlightenment thinkers did not renounce religion altogether. Many opted for a form of Deism, accepting the existence of God and of a hereafter, but rejecting the teachings of Christian theology. They also felt that human life should be spent on improvement. More than a set of -1- Trevino #2 fixed ideas, the Enlightenment implied an attitude and a method of thought. During the first half of the 18th century, the leaders of the Enlightenment waged an uphill struggle against considerable odds. Several were imprisoned for their writings, and most were hampered by government censorship and attacks by the church. The later decades of the century marked a triumph of the movement in Europe and America. The enormous increase in the publication of newspapers and books ensured a wide diffusion of new ideas. Thus in the end seeing that the age of enlightenment was... Free Essays on Renaissance Art Renaissance Art The Renaissance, or "rebirth" in italy began in the late 14th century and lasted until the early 16th century. Many acient ideas were rediscovered in areas such as philosophy, literature, and science. People became became increasinly aware of classical knowledge and therefore resolved to learn by direct observation and study of the natural world. As a result, religious themes became increasingly important to artists, and with the revived interest in ancient ideas came a new variety of subjects which came from Greek and Roman history and mythology. The examples provided by acient buildings and works of art also inspired the development of new techniques in art and the desire to re-create the forms and styles of art that had existed in the classical age. There were many artists in this time and the work they did was genius. Leonardo who is considered the ideal Renaissance thinker, engaged as he was in experiments of all kinds and having brought to his art a spirit of restless inquiry that sought to discover the laws governing diverse natural phenomena. Leonardo's works included the Adoration of the Magi and The Last Supper. Michelangelo who has come to represent the artist endowed with mysterious solitary genius. His universal talents are shown by the tomb of Julius II, The Medici Chapel, The Sistine Chapel and The Last Judgement. Therefore efforts were made to discover the correct laws of proportion for architecture and for the representation of the human body and to organize the creation of space in a picture. Although these artists were very observant of natural phenomena, they also tended to invent general rules from specific observations. They made an effort to go beyond direct translation of nature into laws, and decided to give the word of art some ideal, intangible qualities, establishing a beauty and signifigance great...

Darwin, Charles essays

Darwin, Charles essays In his 23rd year of life, Charles Robert Darwin set sail from England for an around the world journey that proved to be the biggest turning point in biology and genetics ever. The surveying ship H.M.S Beagles voyage would last five years, mainly concerning the South American coast. This trip would come across thousands of species and see animals yet discovered at the time. The expedition would provide the science community with the startling theories of evolution. Darwin was born in Shrewsbury England and grew up hearing his grandfathers theories of evolution. This being often confused, Darwin was not the first to propose that organisms evolve or change through time. He was the first, though, to come up with strong supporting evidence and an explanation unto how it worked. He studied medicine and theology before joining the Beagle, which both helped him on this tremendous journey. The expedition began in England in 1831 and arrived in Brazil three months later and then spent three and half years up and down the South American coast. The crew would stop at an island to survey the land and make inland expeditions. He was amazed at the variations among animals all along the vast coast. The birds and animals on one side of South America were completely different then those of the other. On these coasts, Darwin found fossils of extinct animals that seemed to resemble modern species. These small trips to the coast were informative, but almost all his theories were formed on the Galapagos Islands. It is hard to mention Darwin and his discoveries without bringing up the Galapagos Islands. These small barren islands off the coast of Ecuador fascinated Darwin to no end. These islands, named after the large tortoises (Galapagos in Spanish), had a unique affect on Darwin and all of biology for that matter. He took notes on the variations of the tortoises from island to island; all have a slightly different kind of tortoise. ...

How does the Constitution establish and maintain a culture of liberty Essay

How does the Constitution establish and maintain a culture of liberty - Essay Example These rights are generally acknowledged to be beyond the control of the government. Individual liberty is plays a critical part in achieving individual and societal progress. It is important for attainment of the truth and should be defended from any form of tyranny. Individual liberty forms the basis of universal freedom and human rights. The philosophy of individual liberty is the core value that protects individuals’ freedom, and gives them the right to safeguard their rights. Individual liberty imposes responsibility for self-governance and freedom of choice on an individual. In regards to individual liberty contribution to the constitution’s preservation of liberty, the â€Å"self† factors associated with free men come into play: self-respect (spiritual), self-reliance (economic), and self-discipline (political-social). Self-respect results from the realization of an individual that they are of divine creation and that the spiritual is supreme. These facts a re illustrated in the individuals’ effort in maintaining integrity of unalienable rights. Principles of self-respect insist that people should respect other people. Realization of this aspect of liberty translates to equality and mutual respect among members of the society, which is the main objective of the constitution. The self-reliance factor advocates for economic independence of individuals from others and the government. Economic reliance on other individuals is considered the source of evils in the society. An economically independent individual is a free man enjoying liberty. From Alexander Hamilton’s quote, power over a man’s subsistence contributes power over his free will. Economic independence rids the community of social evils that threaten liberty of individuals. Self-discipline of individuals involves their good-will performance of duties assigned to them. Self-discipline advocates for the truth, a principle that states that there is no right apa rt from duty, and no freedom or liberty apart from responsibility. Self-discipline draws the boundary between the rights of individuals and equal rights of others in the society. This means that individuals in the society understand their rights, and the boundary that separates those rights with the equality of other people. Such an understanding in the society will create sound conduct in the general community concerning maintenance and upholding of individuals’ liberty. It highlights the political-social characteristic of free man living among free men surrounded by an environment of freedom. Several founders highlight the importance of individual rights and citizen’s liberty. In the Declaration of Independence, Thomas Jefferson wrote that one important duty of the government to its citizen was to safeguard the inalienable rights of individuals, which include liberty, life, and pursuit of happiness. The Fifth and Fourteenth Amendment safeguards individuals’ li berty, life, and property without due process (Bills of Rights Institute). They secure and safeguard the blessings of individuals’ liberty. Another founder, James Wilson, explained the importance of liberty in laws, saying that law without liberty is meaningless. Individual and religious liberty remains one of the most essential principles of the human freedom. Founded by Ambassador John L. Loeb, it paved way to freedom of warship and free exercising of individual faith to all religious minorities by the Government. It was due to the Ambassador, the founder, that American Experiment became a

Oliver Sacks-Anthropologist on Mars(topic cont. below) Essay

Oliver Sacks-Anthropologist on Mars(topic cont. below) - Essay Example however, attempts to portray these people’s perception not as abnormal but merely different, and he hopes that people are able to discover how a different perception could lead people to extreme creativity or intelligence by people that might have been considered mentally deficient. In Sacks’ essay â€Å"To See and Not See,† Sacks discusses Virgil, a man who had his vision restored to him after forty-five years. Of a person having their vision restored, Sacks asks the question â€Å"Would it be ‘normal’ from the moment vision was restored?† (†¦). To a person that has never had any difficulty in seeing, the thought of not being able to see does not make sense. We might close our eyes and wander around vaguely, but this is not how blind people perceive the world. People view reality as normal, what’s just right there in front of their faces. That’s why the people surrounding Virgil were dismayed when he regained his vision but had to attempt to learn how to use his eyes. Sight is, however, something that the brain must construct and interpret. While people with sight might feel as though they are groping around while walking with eyes closed, Virgil felt the same way about walking with his eyes but no cane: â⠂¬Å"he said that in general he found walking ‘scary’ and ‘confusing’ without touch† (†¦). Similarly, Sacks mentions a case from the eighteenth century of a young boy having his vision restored to him that closely resembled Virgil’s experience: â€Å"the boy encountered profound difficulties with the simplest visual perception. He had no idea of distance. He had no idea of space or size. And he was bizarrely confused by drawings and paintings by the idea of a two-dimensional representation of reality† (†¦). Virgil had all sorts of experiences that were disconcerting to him because that did not match up with his the perception of the world he gained through touch. He was often surprised when he saw people with imperfections in

Population genetics Essay Example | Topics and Well Written Essays - 500 words

Population genetics - Essay Example The equilibrium is the direct consequence of the segregation of alleles at meiosis in heterozygotes. Numerically, the equilibrium shows that irrespective of the particular mixture of genotypes in the parental generation, the genotypic distribution after one round of mating is completely specified by the allelic frequency p. One consequence of the Hardy-Weinberg proportions is that rare alleles are virtually never in homozygous condition. An allele with a frequency of 0.001 occurs in homomygotes at a frequency of only one in a million; most copies of rare alleles are found in heterozygotes. In general, since two copies of an allele are in homozygotes but only one copy of that allele is in each heterozygote, the relative frequency of the allele in the heterozygotes(as opposed to homozygotes) is: Which for q=0.001 is a ratio 999:1. Thus, the frequency of heterozygote carriers of rare genes that are deleterious in a homozygous condition is much greater than the frequency of the affected homomygotes. In our derivation of the equilibrium, we assumed the allelic frequency p is the same in sperm and eggs.

Propolis To Be Selected For Winter Promotion Essay Example for Free

Propolis To Be Selected For Winter Promotion Essay Introduction In coming winter, there will be a special promotion event and a brand of propolis capsules will be selected to present. The aim of this report is to describe the basic information of propolis, show the popularity of propolis and evaluate the advantages and reputation of best seller on market. Firstly the method of research is described, followed by the findings. Then conclusions are drawn and recommendations are made. Methodology Research was conducted to find out the information about propolis. Firstly, table of information about basic information of propolis and research results of evaluation of Comvita Propolis Capsules were conducted by Mr. Tim Burch. Then, websites of two exhibition were visited to get information on Popularity of propolis as a health supplement product. Findings (a) Basic information of propolis According to the table of information, propolis is produced by bee and it is used to build the hives in nature. It is 100% natural substance. Regarding the function, propolis has special power in strengthen and accelerate regeneration of cell as to speed up wound healing. It helps to whiten skin and make skin fine. Besides, boosting immune system is another unique effect of propolis. It contains some anti-allergies like asthma and nasal allergy. Therefore, it helps fight inflammation caused by viruses, bacteria and fungi and lower the chance for other complication occur. (b) Popularity of propolis as a health supplement product Propolis has a board usage as a health supplement product. From the website of MedinePlus(http://www.nlm.nih.gov/medlineplus/druginfo/natural/390.html) shows the following findings. There sufficient evidence to rate effectiveness for Cold sores, Genital herpes and Mouth surgery. Propolis is very popular as it has many medicinal uses today and it presents over the world. From the website of JAFRA(http://www.jafra.gr.jp/eng/propolis1.html)  shows the findings that just in Japan, there are 300 companies are selling propolis health foods and the market is still increasing. Thus, it shows that propolis is very well-received now. (c) Evaluation of Comvita Propolis Capsules Based on research results from Mr. Tim Burch about the best seller on market, Comvita Propolis Capsules. It evaluates this brand of propolis has two major advantages. High purity and flavonoid has found in Comvita Propolis Capsules, it has competitive content of purity and flavonoid than other product. One of the unique features of the product is † additives free†. Comvita Propolis Capsules is a natural product with no artificial colourings lavourings or preservatives. Other than advantages, it has a reputation for honesty and efficiency. There is more than 1000 positive reviews by users on online shopping websites. And Comvita Propolis Capsules becomes the finalist of ‘Product of the Year’ by the Women’s Weekly Health Wellbeing magazine in Australia. It is perceived that Comvita Propolis Capsules is the best seller on market. Nevertheless, the products are not very stable during winter due to the peak consuming season. Pre-order is needed for porduct s supply.

Aging and Women’s Sexuality

Aging and Women’s Sexuality Liqi Liu The World Health Organization regards sexual health as a state of physical, mental, emotional and social well-being related to sexuality (Woloski-Wruble et al., 2010). It is not limited to the absence of disease, infirmity dysfunction or the mere presence of sexual intercourse activity. These factors are a reflection of a successful aging model that incorporates physical well being reflected by a low susceptibility to disease. It also includes social and emotional well-being associated with active engagement with life and mental well being exhibited by a high capacity for physical and cognitive function. Sexuality is an essential component of health at all developmental ages and an important aspect of life satisfaction (Kalra, Subramanyam, Pinto, 2011). The factors that influence the sexuality of women in their middle and old age are socio-cultural, feminine, medical, political, economic factors (Birkhauser, 2009) and international factors. Other influencing factors include social representations of sexuality, physiological conditions, and relationship factors (Ringa, Diter, Laborde, Bajos, 2013). Cultural practices play a critical role in determining sexuality (Shea, 2011). In China, some clinical educators view sexual activities in middle and old age a taboo. Other health professionals view womens feudal attitudes as the main obstacle to sexual liberation. The change in womens social status due to higher education, participation in the labor force and increased use of contraception has intensified sexual activity. These activities within the social environment largely affect the womens responses to their aging process. Other contributing factors include improvement of living standards and life expectancy (Ringa, Diter, Laborde, Bajos, 2013). Health is another key factor affecting sexuality in middle and aged women (Birkhauser, 2009). Cardiovascular disease in postmenopausal women affects their physical, social and general well being. This leads to deterioration of quality of life and adds on the negative effects of menopause (Birkhauser, 2009). Access to health is determined by the financial ability of the women and enabling political framework. Contrary to popular belief, the menopausal status is not a risk factor in sexual dysfunction. In some instances, it led to low sexual desire. Several studies have shown that women past the age of 50 are still sexually active (Ringa, Diter, Laborde, Bajos, 2013). This essay aims to evaluate the various factors that affect sexuality in older women. Background The worlds aging population is increasing, as the current life expectancy is increasing. The life expectancy of women in Israel estimated at 82 years (Woloski-Wruble et al., 2010). About a third of womens life is lived after cessation of menstruation. China constitutes the world’s largest middle-aged and elderly population. Approximately one-fifth of the worlds elderly population and a quarter of the middle-aged population live in China. In 2010, 381.6 million people were between the ages of 40 and 59 while an estimate of 170.9 people was above 60 years of age (Shea, 2011). Demographic studies project a rapid increase in these proportions over the next several decades. By 2050, it is expected that 35.4% of the population in China will be above 60 years of age (Shea, 2011). As such, understanding the needs, desires and capabilities of this group is of paramount importance. As of now, very few studies have focused on sexuality in the elderly and the existing literature contains contradictory information. For instance, some studies indicate that hormonal determinants have no effect on the sexual drive while others show a correlation between hormonal changes and sexual activity. Hence, further studies would greatly help in ascertaining assertions that sexual life is an important determinant of satisfaction in life (Shea, 2011). Cultural Factors Certain cultural norms are the cause of negative attitudes towards sexuality in older people. In some Western cultures, men are considered ready for sexual activity at a younger age than women (Woloski-Wruble et al., 2010). They also claim that women become asexual with age. However, women have in the recent time challenged this view and regarded sex as extremely important (Woloski-Wruble et al., 2010). Research has focused on the sexual dysfunction that is likely to occur after menopausal transition rather than the normal spectrum of normal activities due to the changes arising from hormonal changes. However, it is worth to note that menopause does not necessarily result in sexopause. The belief that sexual activity decreased with age was held since sexuality was limited to intercourse. In recent years, sexuality has been broadened to mean any sexual arousing activity (Woloski-Wruble et al., 2010). Using this broader definition, studies have shown that women remain sexually active even in old age. An intimate relationship is one factor influencing sexuality in older women. Being able to address their expectations would enhance life satisfaction. The Chinese culture is marked by three traditions; Confucianism, Buddhism and Daoism (Shea, 2011). The Confucian tradition advocated for sex for a married couple and only for the purpose of reproduction. Otherwise, it regarded other sexual activities as unrespectful and undignified. Buddhist taught that in order to enjoy perfect peace, one had to give up worldly pleasures and desires. As such, sexual activity beyond the purpose of reproduction was viewed as distracting one from their improvement. Daoist on the other hand regard sex as harmful and self-defeating as it makes men lose their semen (Shea, 2011). A study conducted in China showed that a third of the studied population was of the opinion that sex later in life was unhealthy or abnormal. It also showed a correlation between the womens attitude and the sexual activity. The women who viewed sex as normal were more likely to engage in sexual activities. Further, the women with positive attitudes led healthy relationships with their spouses. The study also suggested that the household composition such as the number of family members and number of generations contributed to the sexual activity later in life (Shea, 2011). Social Factors Women from different regions view menopause differently(Birkhauser, 2009). In the Muslim culture, menstruation is regarded as impurity. Hence, menopausal women gain a higher social status. It is therefore regarded as a happy event that calls for a celebration. In some cases, this is not the case, and hormonal therapy is considered in order to improve patient outcomes. Hormonal therapy provides symptomatic relief and restores sexual activity (Birkhauser, 2009). Hormonal therapy should also be recommended for women with cardiovascular events unless there are associated risks. Some cultures do not allow bleeding and hence alternative medicine is sought to relieve the symptoms while allowing only the desired amenorrhea.The effect of the natural products has not been sufficiently studied (Birkhauser, 2009). Medical Factors The state of health influences the level of sexual activity (Birkhauser, 2009). Women who are of an advanced in age and are in poor state of health are less likely to engage in sexual activities. During the management of somatic diseases, clinicians often neglect the implications for sexual life and hence go undiagnosed (Maciel Lagana, 2014). These problems may cause the patient to be socially withdrawn and result in depression. Cardiovascular diseases are one major cause of reduced activity. Women who suffered from myocardial infarction do not lead a sexually active life (Kalra, Subramanyam, Pinto, 2011). Besides cardiac problems, elderly women may suffer from physical disabilities that affect the motor function (DeLamater Moorman, 2007). This group of patients experience pain and discomfort in sexual activities and are likely to withdraw. In addition, patients may suffer low libido and unwillingness to engage in foreplay (Woloski-Wruble et al., 2010). Feminine Factors Hormonal changes that occur during the onset of menopause result in vagina dryness and, as a result, affect sexual satisfaction (Lindau, Schumm, Laumann, 2008). However, several studies in this area found no correlation between menopausal state and sexual activity (Ringa, Diter, Laborde, Bajos, 2013). Perimenopausal women have increased levels of masturbation suggesting that hormonal changes do not hinder penetrative intercourse. However, some studies have reported that menopausal changes have a negative effect on the sexual life. These inconsistencies could be due to different characteristics of samples used in the different studies(Ringa, Diter, Laborde, Bajos, 2013). Political Factors Older women have few sources of funds to pay for insurance premiums and taxes(WHO, 2007). Inadequate finances may result in delays to seek medical attention following illness. The developing disease compromises the state of health and affects sexual activities. Hence women living regions in which the health policies promote accessibility to health services regardless of the ability to pay enjoy relative health and hence healthy sexual health. It is the duty of each country to develop the best mix of policies in healthcare, income and social services in order to safeguard the well-being and health of older women (WHO, 2007). Economic Factors Poverty is a key player in compromising the health of aging women. Worldwide, women have lower participation in the labor force and are often underpaid as compared to men of equal qualifications. Older women receive employment in low-paying and part-time jobs. Insufficient funds limit the ability of old women to access the most basic needs such as healthcare, shelter and food. It is estimated that 70% of the women in the world live below the poverty line of less than US $ 1 a day (WHO, 2007). A large number of these are found in the developing countries. These income inequities compromise the well-being of the elderly women and, as a result, their sexual health is affected. Conclusion A satisfactory sexual life is an essential component of good quality of life. However, Sexual activity changes with age and may affect the quality of life. The factors that influence these changes include state of health, socio-cultural values political and economic factors. Different regions practice different traditions that may affect how women in their menopausal age view sexual activities. Some practices limit sexual activity for reproduction purposes while in some cultures sexuality is liberal. One of the major health factors is cardiovascular events. Myocardial infarction leads to depression and anxiety. These factors affect sexual satisfaction and hence decrease sexual activity. While managing these conditions, it is essential that the healthcare providers engage the patients on sexual health. The level of economic empowerment determines the accessibility of social services such as health. Since older women have fewer financial resources, the right policy mix should be adopted to enhance accessibility to health services and other amenities. Recommendations It is of utmost importance to give sexuality issues in the older population priority same as the other vital needs. Therefore, health professionals should formulate interventions aimed at improving sexual health in menopausal women (Taylor Gosney, 2011). A participatory approach would lead to meaningful interventions, as it would allow the professionals to understand the perception of the different women to sexual satisfaction. It would also ensure that the designed interventions help the women in arriving at successful aging (Shea, 2011). An analysis shows that the present literature is based on speculation rather than facts. Healthcare professionals should carry out participatory research involving women of different ethnic groups, age, and languages. Development of evidence-based knowledge would aid in understanding the different aspects that constitute sexual satisfaction among older women. It would also help in designing of group-specific interventions aimed at improving the quality of life (Woloski-Wruble et al., 2010). Reference Birkhauser, M. (2009). Quality of Life and Sexuality Issues in Aging Women. Climacteric, 52-57. DeLamater, J., Moorman, S. (2007). Sexual Behaviour in Later Life. Journal of Aging and Health, doi.10.1177. Kalra, G., Subramanyam, A., Pinto, C. (2011). Sexuality: Desire, Activity and Intimacy in the Elderly. Indian Journal of Psychiatry, 300-306. Lindau, S., Schumm, P., Laumann, E. (2008). A Study of Sexuality and Health among Older Adults in the United States. New England Journal of Medicine , 762-774. Maciel, M., Lagana, L. (2014). Older Womens Sexual Desire Problems: Biophysichosocial Factors Impacting them and Barriers to Their Clinical Assessment. Journal of Biomedical Research , doi. org/ 10.1155. Ringa, V., Diter, K., Laborde, C., Bajos, N. (2013). Womens Sexuality: From Aging to Social Representations. Journal of Sexual Medicine, 2399-2408. Shea, J. (2011). Older Women, Marital Relationships, and Sexuality in China. Ageing International, 361-377. Taylor, A., Gosney, M. (2011). Sexuality in Older Age: Essential Considerations for Healthcare Professionals. Journal of Age and Ageing, 1-6. WHO. (2007). Women, Ageing, and Health: A Framework for Action. Geneva.

Chernobyl :: Ukraine Disaster History Essays

Chernobyl 1986 was a year of several meaningful worldwide events, some of which included the Voyager 2 got details and pictures of Uranus, the space shuttle Challenger exploded on takeoff, and Haley’s comet soared past Earth (infoplease.com). Perhaps the event that alarmed the world the most, however, was the major nuclear accident that occurred at the nuclear power plant Chernobyl. The nuclear disaster that occurred at Chernobyl in 1986 (Lecture 4/1/02), has forever changed the way that nuclear power plants are viewed by the world. Chernobyl is now an abandoned city in north Ukraine because at 1:23 am on April 26th (Chernobyl.com), during an â€Å"unauthorized test of one of the plant's four reactors, engineers initiated an uncontrolled chain reaction in the core of the reactor after disabling emergency backup systems† (infoplease.com). The type of reactor used at Chernobyl was a graphite-water reactor (Lecture 3/25/02). This means that the moderator of the reactor is graphite, and the coolant is water (Lecture 3/25/02). According to Chernobyl.com, technicians allowed the power level in the fourth reactor to fall to an extremely low level, causing a core meltdown. An explosion ripped the top off the containment building, expelling radioactive material into the atmosphere for over ten days (Chernobyl.com). More was then released in a fire that followed, due to a second explosion that allowed air to rush into the reactor (world-nuclear.org). It was only after Swedish instruments detected a problem from the explosion that Soviet authorities admitted that an accident had occurred (infoplease.com). The reactor core was sealed off by air-dropping a cement mixture which included 5,000 tons of boron, dolomite, sand, clay and lead, but not before eight tons of radioactive material had escaped into the atmosphere (infoplease.com). It is estimated that all of the xenon gas, about half of the iodine and caesium, and at least 5% of the remaining radioactive material in the Chernobyl reactor core was released in the accident (world-nuclear.org). Over twenty firefighters died instantly from overexposure to radioactivity, while hundreds suffered from severe radiation sickness (infoplease.

Hydraulic Design of Small Hydro Plants

Version 2 STANDARDS/MANUALS/ GUIDELINES FOR SMALL HYDRO DEVELOPMENT Civil Works – Hydraulic Design Of Small Hydro Plants Lead Organization: Sponsor: Alternate Hydro Energy Center Indian Institute of Technology Roorkee Ministry of New and Renewable Energy Govt. of India May 2011 AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  1 1. GUIDELINES FOR HYDRAULIC DESIGN OF SMALL HYDRO PLANTS This section provides standards and guidelines on the design of the water conductor system.This system includes; head works and intake, feeder canal, desilter (if required), power canal or alternative conveyance structures (culverts, pipelines, tunnels, etc), forebay tank, penstock and surge tank (if required) up to the entry of the turbine, tailrace canal below the turbine and related ancillary works. 1. 1 HYDRAULIC DESIGN OF HEAD WORKS In general head works are composed of three structural components, diversion dam, intake and b ed load sluice. The functions of the head works are: Diversion of the required project flow from the river into the water conductor system.Control of sediment. Flood handling. Typically a head pond reservoir is formed upstream of the head works. This reservoir may be used to provide daily pondage in support of peaking operation or to provide the control volume necessary for turbine operation in the water level control mode. This latter case would apply where the penstock draws its water directly from the head pond. Sufficient volume must be provided to support these functions. There are three types of head works that are widely used on mini and small hydro projects, as below: Lateral intake head works Trench intake head worksReservoir / canal intakes Each type will be discussed in turn. 1. 1. 1 Head Works with Lateral Intakes (Small Hydro) Head works with lateral intakes are typically applied on rivers transporting significant amounts of sediment as bed load and in suspension. The f unctional objectives are: To divert bed-load away from the intake and flush downstream of the dam (the bed load flushing system should be operable in both continuous and intermittent modes). To decant relatively clean surface water into the intake. To arrest floating debris at intake trashracks for removal by manual raking.To safely discharge the design flood without causing unacceptable upstream flooding. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  2 The following site features promote favourable hydraulic conditions and should be considered during site selection: The intake should be located on the outside of a river bend (towards the end of the bend) to benefit from the spiral current in the river that moves clean surface water towards the intake and bed load away from the intake towards the centre of the river.The intake should be located at the head of a steeper section of the river. This will promote remo val of material flushed through the dam which may otherwise accumulate downstream of the flushing channel and impair its function. Satisfactory foundation conditions. Ideal site conditions are rare, thus design will require compromises between hydraulic requirements and constraints of site geology, accessibility etc. The following guidelines assume head works are located on a straight reach of a river. For important projects or unusual sites hydraulic model studies are recommended.A step by step design approach is recommended and design parameters are suggested for guidance in design and layout studies. Typical layouts are shown in Figures 2. 2. 1 to 2. 2. 3. 1. 1. 2 Data Required for design. The following data are required for design: Site hydrology report as stipulated in Section 1. 3 of this Standard giving: – Qp (plant flow) – Q100 (design flood flow, small hydro) – Q10 (design flood flow, mini hydro) (data on suspended sediment loads) – Cw – H -Q Curves (W. L. rating curves at diversion dam) Topographic mapping of the site including river bathymetry covering all head works structure sites.Site geology report. 1. 1. 3 Site Selection: Selection of the head works site is a practical decision which involves weighing of several factors including hydraulic desiderata (Section 2. 2. 1/1. 0), head optimization, foundation conditions, accessibility and constructability factors. Given the importance of intake design to the overall performance of the plant it is recommended that an experienced hydraulic engineer be consulted during studies on head works layout. 1. 1. 4 Determination of Key Elevations: AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  3For the illustrative example: Qp = 10. 0 m3/s Determine V0 = 0. 5 Q0. 2 (= 0. 792, say 0. 80 m/s) (= 12. 5 m2) A0 = Q ? V0 A0 H= (= 1. 77 m, say 1. 80 m) 4 Assume L = 4H (= 7. 08 m, say 7. 0 m) ye = greater of 0. 5 yo o r 1. 5 m (= 1. 80m) yd = L. S (= 0. 28 m) NOL = Z0 + ye + yd + H NOL = 97. 5 + 1. 80 + 0. 28 + 1. 80 (=101. 38m, say 101. 50 m) Sill = NOL – H (= 99. 7m) Crest of weir or head pond NOL = 101. 5 m Height of weir = 4. 0 m These initial key elevations are preliminary and may have to be adjusted later as the design evolves. 1. 1. 5 Head Works LayoutThe entry to the intake should be aligned with the river bank to provide smooth approach conditions and minimize the occurrence of undesirable swirl. A guide wall acting as a transition between the river bank and the structure will usually be required. Intake hydraulics are enhanced if the intake face is slightly tilted into the flow. The orientation of the intake face depends on river bank topography, for straight river reaches the recommended values for tilt vary from 10o to 30o depending on the author. When this angle becomes too large the intake will attract excessive amounts of sediment and floating debris.It is recommended that t he sill level of the intake is kept sufficiently higher than the sill level of the under sluice. The under sluice should be located adjacent to the intake structure. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  4 For development of the head work plan, it is recommended that the following parameters be used for layout: Axis of intake should between 100 ° to 105 ° to axis of diversion structure The actual inclination may be finalized on the basis of model studies. Divide wall, if provided, should cover 80% to 100% of the intake.Assume flushing flow equal to twice project flow then estimate the width and height of the flushing gate from orifice formula,: Example should be in appendix. Qf = 0. 6 ? 0. 5W2 Where: Qf = flushing flow W = gate width H = gate height (= 0. 5W) Yo = normal flow depth as shown in 2. 2. 1. 1/2. 0 Sill should be straight and perpendicular to the flow direction. In the sample design (Fig. 2 . 2. 1. 1) the axis of the intake = 105 ° & Qf = 2. 0? 10. 0 = 20m3/s ? 20. 0 = 0. 6 ? 0. 5 W2 ? W = 2. 8 m (say 3. 0m) and H = 1. 5 m. 1. 1. 6 Flood Handling, MFL and Number of Gates.For small hydro a simple overflow diversion weir would be the preferred option if flood surcharge would not cause unacceptable upstream flooding. For purpose of illustration, the following design data are assumed (see Figure 2. 2. 2): Design flood, Q100 = 175 m3/s A review of reservoir topography indicated that over bank flooding would occur if the flood water level exceeded 103. 0 m. Select this water level as the MFL. This provides a flood surcharge (S) of 1. 20 m. Assume weir coefficients as below: Gate, Cw = 1. 70 – – – sill on slab at river bottom. Weir, Cw = 1. 0 – – – – – – -ogee profile. Assume gate W/H ratio = 1:2 H = 4. 0 m ? W = 4. 8 (say 5. 0 m) MFL. = NOL + 1. 50 (= 103. 0m) Qgate = Cw. W. (MFL – ZS)1.. 5 Qweir = Cw. L w. S1. 5 Capacity check for MFL = 103. 0 m No. of Length of Overflow QG Gates Section (m) (m3/s) 0 35. 0 0. 0 1 29. 0 109. 6 QW (m3/s) 82. 8 68. 6 QT (m3/s) 82. 8 178. 2 >175 AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  5 Therefore one gate is sufficient. Where: MFL = Maximum flood level (m) NOL = Normal operating level (m) S = flood surcharge above NOL (m)W = width of gate (m) H = height of gate (m) ZS = elevation of gate sill (m) = weir coefficient (m0. 5s-1) Cw QG, QW, QT = gate, weir and total flows The flow capacity of the sediment flushing gate may also be included in calculating flood handling capacity. 1. 1. 7 Diversion structure and Spillway Plains Rivers: Stability of structures founded on alluvial foundations typical of plains rivers, is governed by the magnitude of the exit gradient. The critical gradient is approximately 1. 0 and shall be reduced by the following safety factors: Types of foundationS hingles / cobbles Coarse sand Fine sand Safety factor 5 6 7 Allowable Exit Gradient 0. 20 0. 167 0. 143 Also diversion structures on plains rivers will normally require stilling basins to dissipate the energy from the fall across the diversion structure before the water can be returned safely to the river. Design of diversion weirs and barrages on permeable foundation should follow IS 6966 (Part 1). Sample calculations in Chapter 12 of â€Å"Fundamentals of Irrigation Engineering† (Bharat Singh, 1983) explain determination of uplift pressure distributions and exit gradients.Further details on structural aspects of design are given in Section 2. 3. 3 of this Standard. Mountain Rivers: Bedrock is usually found at relatively shallow depths in mountain rivers permitting head works structures to be founded on rock. Also the beds of mountain rivers are often boulder paved and are much more resistant to erosion than plains rivers. Therefore there may be no need for a stilling basin. The engineer may consider impact blocks on the downstream apron or simply provide an angled lip at the downstream end of the apron to â€Å"flip† the flow away from the downstream end of the apron.A cut-off wall to bed rock of suitable depth should AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  6 also be provided for added protection against undermining by scour. The head works structures would be designed as gravity structures with enough mass to resist flotation. For low structures height less than 2. 0 m anchors into sound bedrock may be used as the prime stabilization element in dam design. Stability and stress design shall be in accordance with requirements of Section 2. 3. 3 of this Standard. 1. 1. 8 Sediment Flushing Channel To be reviewedThe following approach is recommended for design of the flushing channel: Select flushing channel flow capacity (Qf) = 2? Qp Estimate maximum size of sediment ente ring the pocket from site data or from transport capacity of approaching flow and velocity. In case of diversion weir without gates assume sediment accumulation to be level with the weir crest. (Assume continuous flushing with 3? Qp entering the pocket, for this calculation). Establish entrance sill elevation and channel slope assuming an intermittent flushing mode (intake closed) with Qs = 2Qp, critical flow at the sill, supercritical flow downstream (FN ? 1. 0) and a reservoir operating level 0. 5m below NOL. Determine slope of channel to provide the required scouring velocity, using the following formula which incorporates a safety factor of 1. 5: i = 1. 50 io d 9/7 i0 = 0. 44 6 / 7 q Where: io = critical scouring velocity d = sediment size q = flow per unit width (m3/s per m) Verify that flow through pocket in continuous flushing mode (Qs = 3Qs) will be sub critical, if not lower entrance sill elevation further. Determine height of gate and gate opening based on depth of flow at gate location and corresponding gate width. Increase the above theoretical gate height by 0. 5 m to ensure unrestricted open channel flow through the gate for intermittent flushing mode and a flushing flow of 2 Qp. For initial design a width to height ratio of 2:1 for the flushing gate is suggested. 1. 1. 9 Intake/Head Regulator: In intake provides a transition between the river and the feeder canal. The main design objectives are to exclude bed-load and floating debris and to minimize head losses. The following parameters are recommended: Approach velocity at intake entrance (on gross area) 0. 20 Ve = 0. 5 Q p m / s For trashracks that are manually cleaned, V should not exceed 1. 0 m/s.AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  7 Convergence of side walls 2. 5:1 with rate of increase in velocity not exceeding 0. 5 m/s per linear m. †¢ Height of sill above floor of flushing channel (ye) = greater of 1. 5 m or 50% flow depth. †¢ The floor of the transition should be sloped down as required to join the invert of the feeder canal. Check that the flow velocity in the transition is adequate to prevent deposition in the transition area. If sediment loads are very high consider installing a vortex silt ejector at the downstream end of the transition. Provide coarse trashracks to guard entry to the head gate. The trashrack would be designed to step floating debris such as trees, branches, wood on other floating objects. A clear spacing of 150 mm between bars is recommended. Trashrack detailed design should be in accordance with IS 11388. †¢ The invert of the feeder canal shall be determined taking into consideration head losses through the trashrack and form losses through the structure. Friction losses can be omitted as they are negligible: V2 Calculate form losses as: H L = 0. 3 2 2g Where: V2 = velocity at downstream end of contraction.Calculate trashrack losses as: 4/3 V2 ?t? H L = K f ? ? . Sin? . 2g ?b? Where: Kf = head loss factor (= 2. 42 assuming rectangular bars) T = thickness of bars (mm) B = clear bar spacing (mm) ? = angle of inclination to horizontal (degrees) V = approach velocity (m/s) 1. 1. 10 References on Lateral Intakes and Diversion Weirs. IS Standards Cited: IS 6966 (Part 1) IS 11388 USBR (1987) Singh, Bharat Nigam, P. S. Hydraulic Design of Barrages and Weirs – Guidelines Recommendations for Design of Trashracks for Intakes Design of Small Dams Fundamentals of Irrigation Engineering Nem Chand & Bros. Roorkee (1983) Handbook of Hydroelectric Engineering (Second edition) †¦.. pages 357 to 365 Nem Chand & Bros. – Roorkee (1985) 1. 1. 11 Other References: Bucher and Krumdieck Guidelines for the Design of Intake Structures for Small Hydro Schemes; Hydro ’88/3rd International Conference on Small Hydro, Cancun – Mexico. Bouvard, M. Mobile Barrages and Intakes on Sediment Transporting AHEC/MNRE/SHP Standards/ C ivil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  8 Razvan, E. 1. 2. Rivers; IAHR Monograph, A. A. Balkema – Rotterdam (1992) River Intakes and Diversion DamsElsevier, Amsterdam (1988) SEMI PERMANENT HEADWORKS (MINI HYDRO) For mini hydro projects the need to minimize capital cost of the head works is of prime importance. This issue poses the greatest challenge where the head works have to be constructed on alluvial foundations. This challenge is addressed by adoption of less rigorous standards and the application of simplified designs adapted to the skills available in remote areas. A typical layout is shown in Figure 2. 2. 3. 1. 2. 1 Design Parameters Hydraulic design should be based on the following design criteria: Plant flow Qp) = QT + QD Where: QT = total turbine flow (m3/s) QD = desilter flushing flow (= 0. 20 QT) m3/s QFC = feeder canal flow (= 1. 20 QT) m3/s QF = gravel flushing flow (= 2. 0 QP) Spillway design flow (SDF) = Q10 Where: Q10 = flood peak flow with ten year return period. 1. 2. 2 Layout ? To be reviewed Intake approach velocity = 1. 0 m/s Regulator gate W/H = 2 Flushing channel depth (HD) = 2H + W/3 Flushing channel minimum width = 1. 0 m Assumed flushing gate W/H = 2, determine H from orifice equation, as below: Q f = 0. 53? 2 H 2 . 2 gY1 Y1 = HD for design condition Where: W width of gate (m) H = height of gate (m) Yi = upstream depth (m) = depth of flushing channel (m) HD Select the next largest manufactures standard gate size above the calculated dimensions. 1. 2. 3 Weir AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  9 Determine weir height to suit intake gate and flushing gate dimensions, as shown in Figure 2. 2. 3. For weirs founded on permeable foundations the necessary structure length to control failure by piping should be determined in accordance with Section 2. 2. 1/4. 1 of this Standard.A stepped arrangement is recommended for the downstream face of the weir to dissipate hydraulic energy. The height of the steps should not exceed 0. 5 m and the rise over run ratio should not less than 1/3, the stability of the weir cross-section design should be checked for flotation, over turning and sliding in accordance with Section 2. 3. 1. 1. 3 TRENCH INTAKES Trench intakes are intake structures located in the river bed that draw off flow through racks into a trench which conveys the flow into the project water conductor system. A characteristic of trench intakes is that they have minimum impact on river levels.Trench intakes are applied in situations where traditional headwork designs would be excessively expensive or result in objectionable rises in river levels. There are two quite different applications: on wide rivers and on mountainous streams, but the basic equations are the same for both types. The trench intake should be located in the main river channel and be of sufficient width to collect the design project flow including all flushing flows. If the length of the trench is less than the width of the river, cut off walls will be required into each bank to prevent the river from bypassing the structure.Trench weirs function best on weirs with slopes greater than 4%-5%, for flatter slopes diversion weirs should be considered. The spacing between racks is selected to prevent entry of bed load into the trench. The following terms are sometimes used in referring to trench intake designs. Trench weir, when the trench is installed in a raised embankment. †¢ Tyrolean or Caucasian intakes, when referring to trench intakes on †¢ mountainous streams. Features: AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  10 1. 3. 2 Design ParametersThe following design parameters are suggested for the dimensioning of trench weirs. †¢ Design Flows: The following design flows are recommended: Bedload flushing flo w (from collector box) = 0. 2 QT †¢ Desilter flushing flow = 0. 2 QT †¢ Turbine flow = 1. 0 QT †¢ Total design flow †¢ = 1. 4 QT Dimensional Layout AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  11 The following factors should be considered in determining the principal dimensions: length, breadth and depth of a trench weir: Minimum width (B)= 1. 25 m (to facilitate manual cleaning) Length should be compatible with river cross section. It is †¢ recommended that the trench be located across main river channel. Maximum width (B) ? 2. 50m. Trashrack bars longer than about 2. 50 m †¢ may require support as slenderness ratios become excessive. Invert of collector box should be kept a high as possible. †¢ †¢ Racks †¢ †¢ †¢ †¢ The clear spacing between bars should be selected to prevent entry of bed-load particles that are too large to be conveniently handled by the flushing system. Generally designs are based on excluding particles greater than medium gravel size from (2 cm to 4 cm).A clear opening of 3. 0 cm is recommended for design. A slope across the rack should be provided to avoid accumulation of bed load on the racks. Slopes normally used vary from 0 ° to 20 °. Rectangular bars are recommended. Bar structural dimension shall be designed in accordance with Section 2. 2. 1/5. 0 of this Standard. An appropriate contraction coefficient should be selected as explained in the following sub-section. Assume 30% blockage. Spacing between racks is designed to prevent the entry of bedload but must also be strong enough to support superimposed loads from bedload accumulation, men and equipment.This issue is discussed further in Subsection 2. 2. 3 / 2. 0. 1. 3. 3 Hydraulic Design of Trench Intake The first step in hydraulic design is to decide the width of the trench intake bearing in mind the flow capacity required and the bathymetry of the river bed. The next step in hydraulic design is to determine the minimum trench breadth (B) that will capture the required design flow. The design approach assumes complete capture of river flow, which implies, that river flow is equal to plant flow for the design condition. Hydraulic design is based on the following assumptions: Constant specific energy across racks. †¢ Effective head on screen is equal to base pressure (depth) †¢ Approach velocity is subcritical with a critical section at the entry to the structure as shown in figure 2. 2. 3/1. The set of equations proposed is based on the method given by Lauterjung et al (1989). †¢ First calculate y1: AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  12 2 y 1 = k. H0 3 – – – – – – – – – – – (1) Where: y1 = depth at upstream edge of rack Ho = the energy head of the approach ing flow k = an adjustment factor (m) m) (-) k is a function of inclination of the rack and can be determined from the following table: Values of k as a Function of Rack Slope (? ) Table: 2. 2. 1/1 ? = 0 ° 2 ° 4 ° 6 ° 8 ° 10 ° 12 ° k = 1. 000 0. 980 0. 961 0. 944 0. 927 0. 910 0. 894 ? = 14 ° 16 ° 18 ° 20 ° 22 ° 24 ° 26 ° k = 0. 879 0. 865 0. 851 0. 837 0. 852 0. 812 0. 800 Then calculate the breadth of the collector trench from the following equations (2) to (4) 1. 50 q – – – – – – – – – – – – – – (2) L= E1. E 2 C. cos? 3/2 . 2gy 1 Where: L = sloped length across collector trench (m) E1 = blockage factor E2 = Effective screen area = e/mC = contraction coefficient ? = slope of rack in degrees y1 = flow depth upstream from Equation 1. (m) q = unit flow entering intake (m3/s per m) e = clear distance between bars (cm or m) m = c/c spacing of bars (cm or m) Assu me E1 = 0. 3 (30%) blockage. â€Å"C† can be calculated from the following formula (as reported by Raudkivi) Rectangular bars: ?e? C = 0. 66 ? ? ?m? ?0. 16 ?m? .? ? ?h? 0. 13 Assume h = 0. 5 y1. This formula is valid for 3. 5> – – – – – – – – – – – – – (3) h e >0. 2 and 0. 15< < 0. 30 m m Finally, the required breadth (B) can be determined as below: B = L cos ? – – – – – – – – – – – – -(4) AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  13 1. 3. 4 Hydraulic Design of Collector Trench Normally a sufficient slope on the invert of the trench is provided to ensure efficient flushing of bed-load particles that would otherwise accumulate on the invert of the trench. A suitable scouring slope can be estimated from the following equation: Ss = 0. 66 d 9 / 7 6/7 qo Where: d = sediment size (m) qo = flow per unit width (Q/B) at outlet of trench (m3/s per m) Ss = design slope of trench invert.The minimum depth of the trench at the upstream and is normally between 1. 0m to 1. 5 m, based on water depth plus a freeboard of 0. 3 m. For final design the flow profile should be computed for the design slope and the trench bottom profile confirmed or adjusted, as required. A step-by-step procedure for calculating the flow profile that is applicable to this problem can be found in Example 124, page 342-345 of â€Å"Open-Channel Hydraulics† by Ven. T. Chow (1959). In most cases the profile will be sub critical with control from the downstream (exit) end.A suitable starting point would be to assume critical flow depth at the exit of the trench. 1. 3. 5 Collector Chamber The trench terminates in a collector box. The collection box has two outlets, an intake to the water conductor system and a flushing pipe. The flushing pipe must be design with the capacity to flush the bed-load sediment entering from the trench, while the project flow is withdrawn via the intake. The bottom of the collection box must be designed to provide adequate submergence for the flushing pipe and intake to suppress undesirable vortices.The flushing pipe should be lower than the intake and the flushing pipe sized to handle the discharge of bed load. If the flushing pipe invert is below the outlet of the trench, the Engineer should consider steepening the trench invert. If the trench outlet invert is below the flushing pipe invert, the latter should be lowered to the elevation of the trench outlet or below. The deck of the collector box should be located above the design flood level to provide safe access to operate gates. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  14 1. 3. Flushing Pipe The flushing pipe should be designed to provide a high enough velocity to en train bed-load captured by the weir. A velocity of at least 3. 0 m/s should be provided. If possible, the outlet end of the pipe should be located a minimum of 1. 0m above the river bed level to provide energy to keep the outlet area free from accumulation of bed load that could block the pipeline. 1. 3. 7 References on Trench weirs CBIP, (2001): Manual on Planning and Design of Small Hydroelectric Scheme Lauterjung et al (1989): Planning of Intake Structures Freidrich Vieweg and Sohn, Braunswchweig – GermanyIAHR (1993): Hydraulic Structures Design Manual: Sedimentation: Exclusion and Removal of Sediment from Diverted Water. By: Arved J. Raudkivi Publisher: Taylor & Francis, New York. Chow (1959): Open- Channel Hydraulics Publisher: McGraw-Hill Book Company, New York. 1. 4 RESERVOIR, CANAL AND PENSTOCK INTAKES The designs of reservoir, canal and penstock intakes are all based on the same principles. However, there are significant variations depending on whether an intake is a t the forebay reservoir of a run-of-river plant or at storage reservoir with large draw down or is for a power tunnel, etc.Examples of a variety of layouts can be fond in IS 9761 Hydropower Intakes – Criteria for Hydraulic Design or Guidelines for Design of Intakes for Hydropower Plants (ASCE, 1995). The features common to all designs are shown in the following sketch: AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  15 The objectives of good design are: To prevent entry of floating debris. †¢ To avoid formation of air entraining vortices. †¢ To minimize hydraulic losses. †¢ 1. 4. 1 Control of floating debrisTo prevent the entry of debris a trashrack is placed at the entry to the intake. For small hydro plants the trashrack overall size is determined based on an approach velocity of 0. 75 m/s to 1. 0m/s to facilitate manual raking. Trashracks may be designed in panels that can be lowered into p lace in grooves provided in the intake walls or permanently attacked to anchors in the intake face. The trashracks should to sloped at 14 ° from the vertical (4V:1H) to facilitate raking. The spacing between bars is determined as a function of the spacing between turbine runner blades.IS 11388 Recommendations for Design of Trashracks for Intakes should be consulted for information about spacing between trashracks bars, structural design and vibration problems. Also, see Section 2. 2. 1/5 of this Standard. 1. 4. 2 Control of Vortices First of all the direction of approach velocity should be axial with respect the intake if at all possible. If flow approaches at a significant angle (greater than 45o) AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  16 from axial these will be significant risk of vortex problems.In such a situation an experienced hydraulic engineer should be consulted and for important projects hydra ulic model studies may be required. For normal approach flow the submergence can be determined from the following formulae: S = 0. 725VD0. 5 S D V = submergence to the roof of the gate section (m) = diameter of penstock and height of gate (m) = velocity at gate for design flow. (m/s) Where: A recent paper by Raghavan and Ramachandran discusses the merits of various formulae for determining submergence (S). 1. 4. 3 Minimization of Head lossesHead losses are minimized by providing a streamlined transition between the entry section and gate section. Minimum losses will be produced when a streamlined bellmouth intake is used. For a bellmouth intake the transition section is formed with quadrants of ellipses as shown in the following sketch. The bellmouth type intake is preferred when ever the additional costs are economically justified. For smaller, mainly mini hydropower stations, simpler designs are often optimal as the cost of construction of curved concrete surfaces may not be offse t by the value of reduction in head losses.Details on the geometry of both types are given †¢ Bellmouth Intake Geometry Geometries for typical run-of-river intakes are shown below: A gate width to height of 0. 785 (D): 1. 00 (H) with H = D is recommended. This permits some reduction in the cost of gates without a significant sacrifice in hydraulic efficiency. There is a second transition between the gate and penstock, rectangular to circular. For a gate having H = D and W= 0. 785D the flow velocity at the gate will be equal to the velocity in the penstock so no further flow acceleration is produced in this section. A length for this transition of 1. x D should be satisfactory. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  17 The head loss co-efficient for this arrangement in Ki =0. 10 Details for layout of bell mouth transitions connecting to a sloping penstock are given in IS9761. †¢ Simplified layout (Mini-Hydro): For smaller/mini hydro projects intake design can be simplified by forming the transition in plane surfaces as shown below: The head loss for this design (Ki) = 0. 19V2/2g. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  18 . 4. 4. AIR VENT An air vent should be placed downstream of the head gate to facilitate air exchange between atmosphere and the penstock for the following conditions: †¢ Penstock filling when air will be expelled from the penstock as water enters. †¢ Penstock draining when air will enter the penstock to occupy the space previously filled by water. The air vent (pipe) must have an adequate cross section area to effectively handle these exchanges of air. The following design rules are recommended: Air vent area should the greater of the following values Where: (m3/s) AV = 0. 0 Ap or QT AV = 25. 0 (m2) AV = cross-section area of air vent pipe AP = cross-section area of penst ock (m2) QP = turbine rated flow ( ? QT of more than one turbine on the penstock) The air vent should exhaust to a safe location unoccupied by power company employees on the general public. 1. 4. 5 PENSTOCK FILLING A penstock should be filled slowly to avoid excessive and dangerous â€Å"blowback†. The recommended practice is to control filling rate via the head gate. The AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  19 ead gate should not be opened more than 50 mm until the penstock is completely full. (This is sometime referred to as â€Å"cracking† the gate. ) 1. 4. 6 REFERENCES ON PENSTOCK INTAKES: †¢ 1. 4. 7 Indian Standard Cited. IS 9761: Hydropower Intakes – Criteria for Hydraulic Design OTHER REFERENCES †¢ Guidelines for Design of Intakes for Hydroelectric Plants ASCE, New York (1995) †¢ Validating the Design of an Intake Structure : By Narasimham Raghavan and M. K. Ram achandran, HRW – September 2007. †¢ Layman’s Guidebook European Small Hydro Association Brussels, Belgium (June 1998)Available on the internet. †¢ Vortices at Intakes By J. L. Gordon Water Power & Dam Construction April 1970 1. 5. TRASHRACKS AND SAFETY RACKS 1. 5. 1 Trashracks: Trashracks at penstock intakes for small hydro plants should be sloped at 4 V: 1H to facilitate manual raking and the approach velocity to the trashracks limited to 1. 0 m/s or less. Use of rectangular bars is normal practice for SHP’s. Support beams should be alignment with the flow direction to minimize hydraulic losses. Detailed trashrack design should be done in accordance with IS 11388. 1. 5. 2Safety Racks: Safety racks are required at tunnel and inverted siphon entries to prevent animals or people who may have fallen into the canal from being pulled into these submerged water ways. A clear spacing of 200 mm between bars is recommended. Other aspects of design should be in accordance with IS 11388. 1. 5. 3 References on Trashracks IS11388 – â€Å"Recommendations for Design of Trashracks for Intakes†. ASCE (1995) –â€Å"Guidelines for Design of Intakes for Hydroelectric Plants†. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  20 DRAWINGS:AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  21 AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  22 2. HYDRAULIC DESIGN OF WATERWAYS The waterways or water conduction system is the system of canals, aqueducts, tunnels, inverted siphons and pipelines connecting the head works with the forebay tank. This Section provides guidelines and norms for the hydraulic design of these structures. 2. 1 2. 1. 1 CANALS Canals for small hydro plants are typically constructed in masonry or reinforced co ncrete.Several typical cross section designs are shown below: AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  23 Lined canals in earth, if required, should be designed in accordance with Indian Standard: IS 10430. A further division of canal types is based on function: – Feeder canal to connect the head regulator (intake) to the desilter – Power canal to connect the desilter to the Forebay tank. 2. 1. 2 Feeder Canals 2. 1. 2. 1 Feeder canal hydraulic design shall be based on the following criteria: = Turbine flow (QT) + Desilter flushing flow (QF).Design flow (Qd) AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  24 2. 1. 2. 2 Scouring velocity: A sufficiently high velocity must be provided to prevent deposition of sediment within the canal. This (scouring) velocity can be determined from the following formulae: d 9/7 S C = 0. 66 6 / 7 n = 0. 015 q 1 1 ? VS = . R 2 / 3 . S C/ 2 n Where: Sc = Scouring slope d = Target sediment size (m) q = Flow per unit width (Q/W) (m/s/m) R = hydraulic radius (m) Vs = scouring velocity (m/s) n = Manning’s roughness coefficient 2. 1. 2. 3 Optimization:The optimum cross section dimensions, slope and velocity should be determined by economic analysis so as to minimize the total life time costs of capital, O&M and head losses (as capitalized value). The economic parameters for this analysis should be chosen in consultation with the appropriate regional, state or central power authorities these parameters include: – Discount rate (i) – Escalation rate(e) – Plant load factor – Service life in years (n) – Annual O+M for canal (% of capital cost) – Value of energy losses (Rs/kWh). Also see Section 1. 7 of this Standard. The selected design would be based on the highest of Vs or Voptimum. . 1. 2. 4 Freeboard: A freeboard allowance above the steady state design water level is required to contain water safely within the canal in event of power outages or floods. A minimum of 0. 5 m is recommended. 2. 1. 3 Power Canals: Power canal design shall be based on the following criteria a) Design flow = total turbine flow (QT) b) Power canal design should be based on optimization of dimensions, slope and velocity, as explained in the previous section. For mini-hydro plants Q < 2. 0 m3/s optimal geometric design dimensions for Type 1 (masonry construction) can be estimated by assuming a longitudinal slope of 0. 04 and a Manning’s n value of 0. 018. Masonry construction would normally be preferred for canals with widths (W) less than 2. 0 m (flow area = AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  25 2. 0 m2). For larger canals with flow areas greater than 2. 0m2, a Type 3, box culvert design would be preferred – based on economic analysis. c) Fr eeboard: A freeboard allowance above the steady state design level is required to contain water safety within the canal in event of power outages. The waterway in most SHP’s terminates in a Forebay tank.This tank is normally equipped with an escape weir to discharge surplus water or an escape weir is provided near to the forebay tank. For mini-hydro plants a minimum freeboard of 0. 50 m is recommended. The adequacy of the above minimum freeboard should be verified for the following conditions: †¢ Maximum flow in the power canal co-incident with sudden outage of the plant. †¢ Design flow plus margins for leakage losses (+0. 02 to +0. 05 QT) and above rated operation (+ 0. 1QT). †¢ Characteristics of head regulator flow control. The freeboard allowance may be reduced to 0. 5 m after taking these factors into consideration. The maximum water level occurring in the forebay tank can be determined from the weir equation governing flow in the escape weir. 2. 1. 4 Reje ction Surge Designs which do not incorporate downstream escape weirs would be subject to the occurrence of a rejection surge in the canal on sudden turbine shutdown, giving above static water levels at the downstream end, reducing to the static level at the upstream (entry) end of the water way. Methods for evaluating water level changes due to a rejection surge are explained in Section 2. 2. 2 / 7. 0 of this Standard. . 2 AQUEDUCTS Aqueducts are typically required where feeder or power canals pass over a gully or side stream valley. If the length of the aqueduct is relatively short the same channel dimensions as for the canal can be retained and there would be no change in hydraulic design. For longer aqueducts design would be based on economic analysis subject to the proviso that flow remains sub critical with NF ? 0. 8 in the flume sections. The following sketch shows the principal dimension of aqueduct entry and exit transitions and flume section. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design OfSmall Hydro Plants /May 2011  Ã‚  26 The changes in invert elevation across the entry and exit structures can be calculated by Bernouli’s equation as below: †¢ Entry transition – consider cross – section (1) and (2); V2 V2 Z 1 + D + 1 = Z 2 + d + 2 + hL 2g 2g and 2 †¢ b? V ? hL = 0. 10 ? 1 ? ?. 2 ? B ? 2g Z2 can be determined from the above equations, since all geometrical parameters are known. Flume – Sections (2) to (3) The slope of the flume section is determined from Manning’s equation 2 †¢ ? Vn ? ( S ) = ? 2 / 3 ? . A Manning’s n = 0. 018 is suggested for concrete channels. ?R ?Some designers increase this slope by 10% to provide a margin of safety on flow capacity of the flume. Exit transition – consider cross section (3) and (4): V2 V2 Z 3 + d + 3 = Z 4 + D + 4 + hL 2g 2g AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  27 and 2 b? V ? hL = 0. 20 ? 1 ? ?. 3 ? B ? 2g Z4 can be determined from the above equations, since all geometrical parameters are known. The same basic geometry can be adapted for transition between trapezoidal canals sections and rectangular flume section, using mean flow width (B) = A/D. . 3. INVERTED SYPHONS 2. 3. 1 Inverted syphons are used where it is more economical to route the waterway underneath an obstacle. The inverted syphon is made up of the following components: †¢ Entry structure †¢ Syphon barrels †¢ Exit structure †¢ Entry Structure: Hydraulic design of the entry structure is similar to the design of reservoir, canal and penstock intakes. Follow the guidelines given in Section 2. 2. 2/2. of this Standard. †¢ Syphon barrels: The syphon barrel dimensions are normally determined by optimization ? V? ? does not tudies, with the proviso that the Froude Number ? N F = ? gd ? ? ? exceed 0. 8. Invert elevations are determine d by accounting for head losses from entry to exit of the structure using Bernouli’s equation. For reinforced concrete channels a Manning’s â€Å"n† value of 0. 018 is recommended. The head loss coefficients for mitre bends can be determined from USACE HDC 228. 2. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  28 AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  29 Exit structure: The exit structure is designed as a diverging transition to minimize head losses; the design is similar to the outlet transition from flume to canal as discussed in Subsection 2. 2. 2/2 of this Standard. The following sketches show the layout of a typical inverted siphon. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  30 2. 3. 2 Reference on Aqueducts and Inverted Syphons â€Å"Hyd raulic Structures† By C. D. Smith University of Saskatchewan Saskatoon (SK) Canada 2. 4. LOW PRESSURE PIPELINESLow pressure pipelines may be employed as an alternative to pressurized box culverts, aqueducts or inverted syphons. Concrete, plastic and steel pipes are suitable depending on site conditions and economics. Steel pipe is often an attractive alternative in place of concrete aqueducts in the form of pipe bridges, since relatively large diameter pipe possesses significant inherent structural strength. Steel pipe (with stiffening rings, as necessary), concrete and plastic pipe also have significant resistance against external pressure, if buried, and offer alternatives to inverted syphons of reinforced concrete construction.Generally pressurized flow is preferred. The pipe profile should be chosen so that pressure is positive through out. If there is a high point in the line that could trap air on filling an air bleeder valve should be provided. Otherwise, hydraulic desi gn for low pressure pipelines is similar to the requirements for inverted syphons. The choice of type of design; low pressure pipeline land pipeline material), inverted syphon or aqueduct, depends on economic and constructability considerations, in the context of a given SHP. Manning’s â€Å"n† Values for selected Pipe Materials Material Welded Steel Polyethylene (HDPE) Poly Vinyl Chloride (PVC)Asbestos Cement Cast iron Ductile iron Precast concrete pipe Manning’s â€Å"n† 0. 012 0. 009 0. 009 0. 011 0. 014 0. 015 0. 013(2) Note: (1) From Table 5. 4 Layman’s Guide Book – ESHA (2) From Ven T. Chow – Open Channel Hydraulics AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  31 2. 5. TUNNELS 2. 5. 1 Tunnels often provide an appropriate solution for water conveyance in mountainous areas. Tunnels for SHP are generally of two types. †¢ Unlined tunnels †¢ Concrete li ned tunnels On SHP tunnels are usually used as part of the water ways system and not subject to high pressures. . 5. 2 Unlined tunnels: Unlined water tunnels can be used in areas of favourable geology where the following criteria are satisfied: a) Rock mass is adequately water tight. Rock surfaces are sound and not vulnerable to erosion (or erodible zones b) are suitably protected. The static water pressure does not exceed the magnitude of the minor field c) rock stress. Controlled perimeter blasting is recommended in order to minimize over break and produce sound rock surfaces. Additionally, this construction approach tends to produce relatively uniform surfaces and minimizes the hydraulic roughness of the completed tunnel surfaces.Design velocities of 1. 5 to 2. 0 m/s on the mean AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  32 cross section area give optimal cross section design. It is normal practice to provi de a 100mm thick reinforced concrete pavement over leveled and compacted tunnel muck in the invent of the tunnel. IS 4880: Part 3 provides additional guidance on the hydraulic design of tunnels and on the selection of appropriate Manning’s â€Å"n† values. 2. 5. 3 Lined Tunnels Where geological are unfavourable it is often necessary to provide concrete linings for support of rock surfaces.IS4880: Parts 1-7 give comprehensive guidelines on the design of lined tunnels. 2. 5. 4 High Pressure Tunnels Design of high pressure tunnels is not covered in this standard. For high pressure design, if required, the designer should consult an experienced geotechnical engineer or engineering geologist. For the purpose of this standard, high pressure design is defined as tunnels subject to water pressures in excess of 10m relative to the crown of the tunnels. 2. 5. 5 Reference on Tunnels IS Standards: IS 4880 â€Å"Code of Practice for the Design of Tunnels Conveying Water†. Ot her References: Norwegian Hydropower Tunnelling† (Third volume of collected papers) Norwegian Tunneling Society Trondheim, Norway. www. tunnel. no Notably: Development of Unlined Pressure Shafts and Tunnels in Norway, by Einar Broch. 2. 6. CULVERTS AND CROSS-DRAINAGE WORKS Small hydro projects constructed in hilly areas usually include a lengthy power canal routed along a hillside contour. Lateral inflows from streams and gullies intercepted by SHP canals often transport large sediments loads which must be prevented from entering the canal. The first line of defense is the canal upstream ditch which intercepts local lateral runoff.The flow in these chains must be periodically discharged or the drain capacity will be exceeded. Flow from these drains is usually evacuated via culverts passing underneath the canal. These culverts would normally be located where gullies or streams cross the canal alignment. The capacity of canal ditches should be decided taking into consideration t he average distance between culverts. In the rare cases when distance between culverts is excessive, consideration should be given to diverting AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  33 itch flows across the canal in flumes or half round pipes to discharge over the downhill side of the canal at suitable locations. Culverts are usually required where the canal route crosses gullies or streams. Culverts at these points provide for flow separation between lateral inflows and canal inflows and often present the most economical solution for crossing small but steep valley locations. It is recommended that culverts design be based on the following hydrological criteria. †¢ For mini hydro projects, 1 in 10 year flood (Q10) †¢ For small hydro projects, 1 in 25 year flood (Q25)Where it is practical to extract the necessary basin parameters, the procedures given in Section 1. 4 should be applied. Otherwise design flows should be estimated from field measurements of cross section area and longitudinal slope at representative cross section of the gully or side stream. A survivable design approach is further recommended with canal walls strengthened to allow local over topping without damage to the canal integrity when floods exceed the design flood values. Detailed hydraulic design should be based on information from reliable texts or design guidelines – such as: â€Å"Design of Small Bridges and Culverts† Goverdhanlal †¢ †¢ 2. 7 2. 7. 1 â€Å"Engineering and Design – Drainage and Erosion Control†. Engineering Manual EM 1110-3-136 U. S. Army Corps of Engineers (1984) www. usace. army. mil/publications/eng-manuals Manufacturer’s guides, notably: – American Concrete Pipe Association www. concrete-pipe. org – Corrugated Steel Pipe Institute www. cspi. ca Power Canal Surges Power canals that are not provided with escape weirs near their downstream end will be subject to canal surges on rapid load rejections or load additions.The rejection surge will typically cause the downstream water level to rise above static level and may control the design of canal freeboard. For load additions there is a risk that the level will fall to critical at the downstream end and restrict the rate at which load can be taken on by the unit. The following formulae taken from IS 7916: 1992 can be used to estimate the magnitude of canal surges. AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  34 Maximum surge height in a power channel due to load rejection may be calculated from the empirical formulae given below:For abrupt closure hmax = K 2 + 2 Kh For gradual closure within the period required for the first wave to travel twice the length of the channel: K hmax = + V . h / g 2 Where: hmax = maximum surge wave height, K = V2/2g = velocity head, V = mean velocity of flow, and area of cross sec tion h = effective depth = top width †¢ Maximum water level resulting from a rejection surge at the downstream of a canal: Maximum W. L. = Yo + hmax †¢ Minimum water level resulting from by a start up surge at the downstream end of a canal: Minimum W. L. = YS – hmax Where: Yo YS = steady state downstream water level static downstream water level. The maximum water level profile can be approximated by a straight line joining the maximum downstream water level to the reservoir level. 2. 7. 2 Canal Surges on Complex Waterways: For waterway systems comprising several different water conductor types, the above equations are not applicable. In such cases a more detailed type of analysis will be required. The U. S. National Weather Service FLDWAV computer program can be used to solved for the transient flow conditions in such cases (Helwig, 2002). 2. 7. 3 References IS Standards cited:IS 7916: 1992 â€Å"Open Channel – Code of Practiceà ¢â‚¬ . Other References â€Å"Application of FLDWAV(Floodwave) Computer Model to Solve for Power Canal Rejection Wave for Simple and Complex Cases†. P. C. Helwig Canadian Society for Civil Engineering Proceedings, Annual Conference Montreal, Canada (2002). AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  35 3. HYDRAULIC DESIGN OF DESILTERS 3. 1 BACKGROUND Sediment transported in the flow, especially particles of hard materials such as quartz, can be harmful to turbine components.The severity of damage to equipment is a function of several variables, notably: sediment size, sediment hardness, particle shape, sediment concentration and plant head. The control of turbine wear problems due to silt erosion requires a comprehensive design approach in which sediment properties, turbine mechanical and hydraulic design, material selection and features to facilitate equipment maintenance are all considered (Naidu, 200 4). Accordingly the design parameters for desilter design should be made in consultation with the mechanical designers and turbine manufacturer.Where the risk of damage is judged to be high a settling basin (or desilter) should be constructed in the plant waterway to remove particles, greater than a selected target size. 3. 1. 1 Need The first design decision is to determine whether the sediment load in the river of interest is sufficiently high to merit construction of a desilter. There is little guidance available on this topic; however, the following limits are suggested by Naidu (2004): Table 2. 2. 3/1. 0 Concentration Suggested Maximum Allowable Sediment versus Plant Head. Parameter Head Maximum allowable sediment concentrationLow and Medium Head Turbines ? 150 m High Head Turbines > 150 m 200 ppm 150 ppm 3. 1. 2 Removal Size There are also considerable divergences of opinion on the selection of design size for sediment removal. Nozaki (1985) suggests a size range of between 0. 3 mm to 0. 6 mm for plant heads ranging from 100 m to 300 m. Indian practice is to design for a particles size of 0. 20 m regardless of head. Some authors suggest that removal of particles smaller than 0. 20 mm is not practical. The adoption of 0. 20 mm is the design (target) sediment size is recommended for Indian SHP designs.AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  36 3. 1. 3 Types of Desilters There are two basic types of desilters: Continuous flushing type Intermittent flushing type Guidelines for design of both types are given in this section. 3. 2. DESIGN CONSIDERATIONS 3. 2. 1 Data Requirements (Small Hydro Plants) It is recommended that a program of suspended sediment sampling be initiated near the intake site from an early stage during site investigations to ensure that sufficient data is available for design.The sampling program should extend through the entire rainy season and should comprise at least two readings daily. On glacier fed rivers where diurnal flow variations may exist, the schedule of sampling should be adjusted to take this phenomenon into account and the scheduled sampling times be adjusted to coincide with the hour of peak daily flow with another sample taken about twelve hours later. While it is often assumed that sediment load is directly related to flow, this is only true on the average, in a statistical sense.In fact it is quite likely, that the peak sediment event of a year may be associated with a unique upstream event such as a major landslide into the river. Such events often account for a disproportionately large proportion of the annual sediment flow. Therefore, it would also be desirable to design the sediment measurement program to provide more detailed information about such events, basically to increase the sampling frequency to one sample per 1 or 2 hours at these times. A five year long sediment collecting program would be ideal. Less than o ne monsoon season of data is considered unsatisfactory.Some authors suggest that the vertical variation of sediment concentration and variations horizontally across the river be measured. However, on fast flowing rivers inherent turbulence should ensure uniform mixing and sampling at one representative point should be sufficient. The data collected in a sediment sampling program should include: †¢ Mean daily concentration of suspended sediment (average of two readings twelve hours apart) †¢ Water temperature †¢ Flow (from a related flow gauging program) The following additional information can then be derived from collected samples.AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  37 †¢ †¢ †¢ A sediment rating curve (sediment concentration versus flow – where possible) Particle size gradation curve on combined sample Specific gravity of particles. It is also recommended that a pet rographic analysis be carried out to identify the component minerals of the sediment mix. It is likewise recommended that experiments be made on selected ranges of particles sizes to determine settling velocities. A further discussion on the subject of sediment sampling is given in Avery (1989)The characteristics of the sediment on a given river as obtained from a data collection program will assist in selection of appropriate design criteria. 3. 2. 2 Data Requirements (Mini Hydro Plants) On mini hydro projects where resources and time may not be available to undertake a comprehensive sampling program, selection of design parameters will depend to a great extent on engineering judgment, supplemented by observations on site and local information. The following regional formula by Garde and Kothyari (1985) can be used to support engineering decision making. 0. 19 ?P ? 0 Vs = 530. 0 P0. 6. Fe1. . S0. 25 Dd . 10 .? max ? ?P? Where Vs = mean sediment load in (tonnes/km2/year) s = average slope (m/m) Dd = drainage density, as total length of streams divided by catchment area (km/km2) P = mean annual precipitation (cm) Pmax = average precipitation for wettest month (cm) Fe = ground cover factor, as below: 1 Fe = [0. 80 AA + 0. 60 AG + 0. 30 AF + 0. 10 AW ] ? Ai = arable land area AA = grass land area (all in km2) AG AF = forested area AW = waste land area (bare rock) 3. 2. 3 Design Criteria The principle design criteria are: 1. The target size for removal (d): d = 0. 20 mm is recommended 2.Flushing flow: QF = 0. 2 QP is recommended 3. Total (design) flow: QT = QP + QF = 1. 2 QP. Where QP is plant flow capacity in (m3/s). AHEC/MNRE/SHP Standards/ Civil Works – Guidelines For Hydraulic Design Of Small Hydro Plants /May 2011  Ã‚  38 3. 2. 4 Siting The following factors control site selection 1. A site along the water way of appropriate size and relatively level with respect to cross section topography 2. A site high enough above river level to provide adequate head for flushing. For preliminary layout a reference river level corresponding to the mean annual flood and minimum flushing head of 1. 0 m is recommended. In principle a desilting tank can be located anywhere along the water conductor system, upstream of the penstock intake. Sometimes it is convenient to locate the desilting basin at the downstream end of the waterway system where the desilter can also provide the functions of a forebay tank. However, a location as close to the head works is normally preferred, site topography permitting. 3. 3 Hydraulic Design A desilter is made up of the following elements: †¢ Inlet section Settling tank †¢ Outlet section †¢ †¢ Flushing system 3. 3. 1