Civil Right Movement Essay Example | Topics and Well Written Essays - 1250 words

Civil Right Movement - Essay Example They were the oppressed group as they were denied the equal rights and opportunities as white people. The end of World War II set a new tone for civil rights movement. The movement got prominence when in 1954 Supreme Court of US gave a landmark judgment in Brown vs. Board of Education case. In this judgment, Supreme Court declared racial segregation in school totally illegal and a punishable crime (Brown vs. Board of Education). Finally, the Civil Right Act of 1964 put an end to all discrimination that African Americans were suffering from since centuries. The Act eliminated obstacles that persisted for centuries preventing development of African-Americans. Over 45 years have passed since then; the status of African Americans when seen in the above perspective has improved a lot. Now they have not only equal voting rights to elect the government but they can also occupy any office in the US by their sheer ability. The segregation episodes that their children faced in the schools have been now buried deep into history books. They share all public places with equal rights. They can enter into any professions without any restriction depending upon their interest and ability. It is not surprising that African Americans have excelled in sports, politics, business and hosts of other activities. Their contribution in the US mainstreams reached to its pinnacle when an African American reached to the highest office of US in 2009. Several well-known figures such as Tiger Woods, Oprah Winfrey, Michael Jordan sprung into limelight in the post-civil movement era. Boxer Muhammad Ali, tennis star Arthur Ash, Michael Jordan in basketball, athlete Carl Lewis are some of the prominent names that have excelled in sporting activities after the end of Civil Right movement. Condoleezza Rice and Colin Powell became Secretary of State and many large cities such as Chicago, Los Angeles, New York have had mayors from African American community. Barack Obama occupying the highest office in US is a veritable testimony to the genuine change process that has taken place in the last few decades in the country giving equal opportunity, status and privilege to the African Americans as enjoyed by others. The law has given them equal rights and opportunities in all walks of life; this certainly proves that the status of African American has improved significantly since the end of the Civil Rights Movement. Answer 2. The US Law has taken its course giving African American full rights and opportunities but the African American community still faces numerous issues and challenges in the US society. Cedric Herring argues that African Americans still face job discriminations in the US. Giving an example of Texaco, the author states that the companies systemically deny promotions to the members of African American community. The New York Times produced evidence that how several Texaco Executives referred them as 'black jelly beans' and 'niggers' in their mutual conversations. Fi nally, Texaco admitted having excluded all black employees’ names from the list of next level promotions. Later, Texaco had to settle the case by paying $176 million in the largest ever discrimination suit seen in the US. Before 1964, discrimination to the African American community was overt but in the post civil rights movement era it has taken a covert route. Before 1964, no laws questioned the

Medication errors Essay Example | Topics and Well Written Essays - 1000 words - 1

Medication errors - Essay Example In addition misdiagnosis and fatigue while attending to patients account to a large percentage of the errors. There are several instances throughout the medical process where medical errors can occur right from diagnosing the patient to the point where treatment is prescribed and administered by the relevant parties. Among these instances include documentation, dispensing, administering and monitoring a majority of which are carried out by nurses. This places a large responsibility on their hands and explains why medication errors and the safety of the patients lie at the core of being a nurse. The roles medical practitioners play in the occurrence of medical errors clearly cannot be overruled and it therefore goes without say, clear guidelines and procedures will go a long way in managing them (Clinic, 2011). This paper will outline the cause of medical errors, its prevention how it is reported and steps that could be taken to ensure the safety of patients. From the approach that hu man errors amount to the greatest percentage of medical errors there are two angles medication errors can be viewed from. The first angle looks at the error as being caused by human frailty. Poorly paid, overworked and unmotivated employees tend to overlook a number of critical issues which are crucial and if unattended amount to medical errors. Similarly human nature such as forgetfulness, not paying attention to details or even negligence of laid down procedures while administering care to patient’s directly cause medical errors. The second approach on the contrary views these errors in the medical field as being caused by a combination of factors surrounding the institutions. There exists an array of issues among them a broken line of communication that leads to decisions amongst practitioners being made based on partial or wrong information. This approach looks at the errors as being caused by the systems in place and for this reason they are bound to occur unless the cor rect measures are taken to prevent them. Based on this, much as human error may stands as the principle cause of medication errors, the conditions surrounding nurses and other medical staff go a long way in determining the safety of patients and in the long run preventing these errors. Even though issues handled within the hospital are diverse every one of which has a unique way of solving, most errors are recurrent and tend to fall into a pattern and therefore changes in the right policies will advertently reduce the number of medical errors. Furthermore it is important to note even the most meticulous and the very best of professionals make mistakes and placing such errors squarely on medical officers is a definite oversight. An error could occur as early as in the diagnosis stage of a patient or during the latter stages of administering treatment and drugs. All medical staff involved in this process can be the cause of such an error and therefore are directly or indirectly affect ed by its effects. Patients largely sit on the receiving end of medical errors and tend to carry the burden of its adverse effects. In the case of a misdiagnosis they get the wrong treatment and will still have to seek treatment again over and above the fact that they may suffer from deadly side effects if not fatal. These additional treatment costs impact heavily on the hospitals financials. In addition the hospitals reputation is spoilt due to malpractice and possible

The study of history is the study of change over time Essay Example for Free

The study of history is the study of change over time Essay Soils of America and other places of the world speak volumes of the breath taking accords and blood streaming accounts of travelers, explorers, pilgrims, discoverers, traders etc. from several places across Europe cutting across the vagaries of oceans to pay their own way for new avenues and opportunities seemed to be waiting for them. Efforts to make their permanent settlements after their long and arduous journey into the lands of America and other places across oceans bore the testament to the beginning of new profound but â€Å"conflicting† relationships between them and non Europeans which time and again saw several changes. This essay will explore in depth the vicious account of 1620 when Pilgrims dropped their anchor at Plymouth, their efforts to settle in the land previously occupied by Native Indians and their relations with them from the vivid account of Nathaniel Philbrick in his â€Å"Mayflower.† And in comparison to it, the brutalities, atrocities and exploitation of King Leopold II of Belgium on the slaves and other natives of Central Africa in King Leopolds Ghost by Adam Hochschild. Exploitation of slaves in the name of development was the hallmark of the social and political construes of the colonies established by Europeans. Hothschild found that â€Å"The nineteenth century European drive for possessions in Africa, the moral rationalization of the â€Å"civilizing† mission was used to justify colonialism† (Nolan, online), and the biggest example of this moment was the formation of Leopol’s International African Association (IAA) in 1876. This association was the result of the conference held by famous explorers in Brussels. The conference was opened by King Leopold speech, â€Å"To open to civilization the only part of our globe which it has not yet penetrated, to pierce the darkness which hangs over entire peoples, is, I dare say, a crusade worthy of this century of progress.† (Hothschild, 44) The main aim of the conference was the abolishment of Arab slave trade, securing peace among the chiefs, and negotiations justly and impartially, but in contrast to it Leopold assigned Henry Morton Stanley to study and explore interiors of Congo.   He said, â€Å"Im sure if I quite openly charged Stanley with the task of taking possession in my name of some part of Africa, the English will stop me So I think Ill just give Stanley some job of exploration which would offend no one, and will give us the bases and headquarters which we can take over later on.† (Hothschild, 58) He studied in detail the types of colonialism of Dutch East Indies, British form of colonizing of India and Africa. He was greatly inspired by the book   â€Å"Java or How to Manage a Colony, by English lawyer JWB Money†, because it gave him techniques for various forms of exploitations in vast colonies. This made Leopold to establish his position on importance of forced labor, whereby he said, â€Å"Forced labor is the only way to civilize and uplift these indolent and corrupt peoples of the Far East.† (Hothschild, 37) Between the years 1885 to 1908, there were around five to eight million labors under the barbaric rule and terror of Leopold. When Hochschild himself read about these acts of barbarism, he was forced to rebuke at his ignorance of horrors of such a magnitude. From then on the account that Hochschild provided made King Leopold’s Ghost as an articulate historical version of the slavery that would always remain a brutal wound in the heart of history. In introduction only Hochschild said, â€Å"unlike other great predators of history, from Genghis Khan to the Spanish conquistadors, King Leopold II never saw a drop of blood spilt in anger. He never set foot in the Congo. There is something very modern about that, too, as there is about the bomber pilot in the stratosphere, above the clouds, who never hears screams or sees shattered homes or torn flesh.† (Hochschild, 4) As compared to it, â€Å"Mayflower† is a struggle of pilgrims to create place for themselves in Plymouth and maintain cordial relationship with native Americans. It is on one hand tragic and on the other hand heroic and profound. Nathaniel Philbrick gave a live account while on his research for Mayflower of 102 passengers who landed at Prince town harbor in 1620 only to be welcomed by the wilderness of the place and was greeted by future governor William Bradford.   There were very few trees and no man in site, as they were virtually wiped out by the series of plague and when Pilgrims reached there they only found whitened bones of the dead people lying scattered along the shoreline. From this place, Pilgrims decided to settle and began their new life but it was not easy for them. They not only had to face physical challenges but also attitude of contention and bitter animosity from the locals who considered them as strangers. Only Wampanoag chief Massasoit was the person to help them without whom their survival would not have been possible at all. More than half of English settlers died and few that survived observed their first anniversary with Thanksgiving feast. But as and as population of English increased, natives felt more threatened and there arose new kind of wars between the two. In 1675, Philip, son of Massasoit’s struck against the English settlers, which came to be known as King Philip’s war. The effect of war soon began to be felt by English settlers in other parts too and soon more than half of the towns were burned or vacated. The war lasted for fourteen months but was considered as bloodiest than civil war. More than 5000 out of total population of 70,000 were killed, but in the end there was victory of pilgrims. Though never a close bond existed between the English and natives yet they negotiated with each other to maintain peaceful coexistence, but greediness took over the next generation. The day Pilgrims landed at Plymouth to this day is celebrated as Thanksgiving Holy Day as gesture to Native Indians for their help and food that they shared with their ancestors. As soon as pilgrims established their settlements on Plymouth, immigration from other European states began at a much larger scale.   Between the years 1815-1860, 1865-1890 and between 1890-1914, more than five million immigrants especially from English, Irish, Germanic, Scandinavian, and from northwestern Europe had already made their bases in America. And between 1890-1914, 15 million Turkish, Lithuanian, Russian, Jewish, Greek, Italian and Romania came with the lure of the greener pastures. (Schultz, 1999) The direct effect of civilization was the supply cheap labor that gave boost to the economy. With the immigration economic and social conditions of America began to take a new shape and when Industrial revolution began to show signs of promises of better life for all, there was the growth of middle class.   By the end of civil war and 1910, more than 25 million people from as far as Italy, Greece, Poland, Hungary, Russia, Turkey, Lithuania, Romania were associating themselves with rural Americans for jobs and many new opportunities. They brought with them their own varied culture and religious practices and made their presence felt in every arena of social and economic activities and democracy was taken by immigrants in an enthusiastic spirit. K. Schultz said, â€Å"They would often fell into deep emotions and tears fell down their cheeks when they would set their eyes at her. European immigrants would cry with happiness at the thought of escaping autocratic regimes and entering into an egalitarian, democratic society; and those who were evading famines and poverty would weep at the thought of riches and an easy life that they were expecting in store for them. He further said, ‘To all of them, Lady Liberty symbolized a new beginning’†. (Schultz, 1999) By the end of 1990, the population of United States had already touched 75,994,575 mark and despite of restrictions by the Government on immigration processes, settlers had laid their basis in the American soils and intermingled with the contemporary social culture of America. As said by Evert Louhi in 1925, â€Å"American Civilization, and of all civilizations, in the past, today and forever.† (Hoglund, 146) He further stated that, â€Å"Their descendents were the first real Americans.† (Hoglund, 146) On the other side is the grim picture of Africa shown by Adam Hochschild. When America was on a development stage, Africa was being more colonized. When in 1890 there was a rubber boon- result of John Dunlop’s invention of bicycle tyre, Leopard took advantage of the situation and soon occupied vast stretches of rubber lands of Africa and initiated a brutal system of forced labor. Troops would make their entry into the villages, hold children and women hostages to the point of time till men would bring their share of rubber. The extent of the brutality can be clearly reflected in these lines. â€Å"A whip of raw, sun-dried hippopotamus hide, cut into a long sharp-edged cork-screw strip.† (Hochschild, 120) Rape, murder, death and exploitations reduced the population of Congo to half and brought Leopold a fortune of more than $1 billion. Black American evangelist George Shappard, Edward Dene Morel and Roger Casement showed their grave resentment and strived to bring the atrocites of Leopald in front of the world. He got the Congo Protest Resolution passed in the British Parliament in May 1903, still atrocities continued and when Leopold died, he left behind totally devastated Congo. The European and American history is a history of colonizers over colonized and a legacy of temperaments and attitude of Europeans towards their Native neighbors. Both American and Africa culminated into the colonies of the Europeans powers though with slight deviations. In America, Europeans occupied the Native lands and Pilgrims who were the early settlers tried to maintain their relationship with natives though not cordial, but in Africa it was total subjugation of the European powers. Blacks were turned to slaves, caught and brought to America to work on the plantations in America. The legacy of the relationship between Europeans and non-Europeans brought before us one crucial aspect – exploitation in the name of progress and development. Europeans who were considered to be the most civilized societies went on development spree at the cost of other ethnic races belonging to different origins and races. The Oxford English dictionary defined â€Å"Civilization as advanced state of human society† (History Guide, online edition) but when we look at the history of the man as shown by Nathaniel Philbrick, we are raised with the questions, Civilization as in comparison to what? Is it to sow the seeds of barbarism to cultivate civilization? If we look at our history, we will see that the history of world is also the history of immigration-immigration for the lure of greener pastures. The discoveries by anthropologists on the remains of the human beings in the past few decades also revealed the fact that immigration had been a continuous process since centuries –and the basis of the whole relationship between the Europeans and Non Europeans is based on immigration. The immigrants began to feel the alien lands as their own and from there began their scourge journey of life towards exploitation to get richer resources the lands provided. But with the promises of democracy and easy life with dreams of riches, immigrants themselves began to witness numerous hardships in the name of caste, religion, sex and their ethnic origin. The pilgrims who had rooted the deeper roots in America with their toil and blood soon became the land of several races and religions but the Native Americans who were original residents of America were disgruntled lot. They too had to bear the burnt of slavery, subjugation and racism in the name of development. Africa’s picture was different. This place was never able to see the development and economic progress. Its economy was devastated. America was flourishing and Africa was languishing with poor fatigued people and so as other colonies of the world occupied by Europeans. REFERNCE LIST Hochschild, Adam. â€Å"King Leopolds Ghost—A story of greed, terror and heroism in colonial Africa.† Mariner Books, 1998. Hoglund, Arthur William. â€Å"Finnish Immigrants in America, 1880-1920† New Hampshire: Ayer Company, 1979. Nolan, Stuart. Belgiums imperialist rape of Africa. Internet (6 September1999) http://www.wsws.org/articles/1999/sep1999/king-s06_prn.shtml, April 11, 2008. Povell, M. The History of Vietnamese Immigration. American Immigration Law Foundation Internet (Last updated June 2, 2005) Available: http://www.ailf.org/awards/benefit2005/vietnamese_essay.shtml, April 11, 2008. Schultz, S. K. 1999. Foreign Immigrants in Industrial America. Internet. Available: March 30,: http://us.history.wisc.edu/hist102/lectures/lecture08.html, April 11, 2008.

Designing an automated lawn mower

Designing an automated lawn mower Chapter 1: Introduction to the study Background to the research The first lawn mower was contrivance in 1827 and patented in 1830 by Edwin Beard Budding, an engineer from Stroud, Gloucestershire, England. He got this idea after seeing a machine in a textile industry, they used a cutting cylinder (or bladed reel) mounted on a bench to trim cloth to make a smooth finish after weaving. Budding realized that a similar concept would enable the cutting of grass if the mechanism could be mounted in a wheeled frame to make the blades rotate close to the lawns surface. First lawn mower was all made of cast iron and featured a large rear roller with a cutting cylinder (reel) in the front. Cast iron gear wheels transmitted power from the rear roller to the cutting cylinder. These machines were remarkably similar to modern mowers. By 2000, robotic are most important things in the future, no matter if they are used to work in industry or at our homes, mimic some of the human capabilities, or used to access dangerous environments, launched to space, or simply used to play with. They are help to reduce human dependencies in performing a task and to reduce time for production while maintaining consistent quality of production outputs. Robotic devices are commonly used in manufacturing industries and for domestic use as well. Modern houses normally garden with grass need to be maintained at a short height, is most user upset. Traditional lawn mowing is often a trouble, dangerous and time consuming in cutting the grass. The task of manual lawn mowing can be replaced by automatic lawn mower using a robot programmed to perform such task. A automatic lawn mower is designed and installed in this project. Automatic Lawn mower also can act as an aid to homeowners who can no longer perform physically demanding tasks, such as the elderly or disabled. On the residential side, many elderly and disabled enjoy lawn maintenance, but are no longer able to enjoy the satisfaction of maintaining their own lawn due to the physical demands of traditional lawn mowing equipment. These researches (automatic lawn mowers) are very elderly and disabled friendly with the simple. Automatic lawn mower also has the Perfect Balance Between Eco-friendly and Practicality. Robots are very expensive, not any people really want to buy costly robotic devices. Create a low cost inexpensive automatic lawn mower will allow house owners to maintain their lawn without spending much time and money. An autonomous robot can mow the lawn of a given specific area of the garden without any human supervision. Research problem / Research question However with the continuous development, several resources also make the arbitrary abuse. Oil coal resources are depleting shortages of energy and serious pollution. In the 20th century, energy crisis is any great bottleneck (or price rise) in the supply of energy resources to an economy. It usually refers to the shortage of oil and additionally to electricity or other natural resources. An energy crisis may be referred to as an oil crisis, petroleum crisis, energy shortage, electricity shortage or electricity crisis. The near future, the petroleum crisis already is a very big problem. Globality by way of disburden, they would increase the petroleum price, and debase their expense. Still got another country, hit sb. when hes down increase the petroleum price, and gain profit. Market failure is possible when monopoly manipulation of markets occurs. A crisis can develop due to industrial actions like union organized strikes and government embargoes. The cause may be over-consumption, ageing infrastructure and sometimes bottlenecks at oil refineries and port facilities restrict fuel supply. That crisis involves the industry, business, carrying trade, until economic policy. In response to the petroleum crisis, the principles of green energy and sustainable living movements gain popularity. This has led to increasing interest in alternate power/fuel research such as fuel cell technology, liquid nitrogen economy, hydrogen fuel, biodiesel, solar energy, geothermal energy, tidal energy, wave power, and wind energy, and fusion power. Rotary mowers can throw out debris with tremendous force is one of the most dangerous tools around the home. Each year, approximately 80,000 people with injuries caused by power mowers were treated in emergency departments. More than 9,000 of the people hurt were younger than 18 years. Lawn mower injuries include deep cuts, loss of fingers and toes, broken and dislocated bones, burns, and eye and other injuries. Some injuries are very serious. Both users of mowers and those who are nearby can be hurt. More than 20 percent of lawn mower injuries involving the hands, fingers or wrist. Some time the users want to adjust the height of the mowers wheels, forget pull out the spark plug after that the lawn mower suddenly turns on. When the user use lawn mower also need to make sure all debris (rocks, sticks and toys) are removed from the yard before you begin mowing. Loose objects can project out of the lawn mower and cause serious injury. Aims and objectives In the course of design and installation of an autonomous robot, the following criteria are set to fulfill its objectives: The robot must cutting grass in the surface area The robot must not be too costly and be affordable to all The lawn mower cutting tool can be adjustable with servo motor The robot also can be rechargeable energy with solar planer. To provide an automated lawn mower which follows a programmed path of data point without the use of calibration marker, lights, wires, or buried conductors To provide an automated lawn mower that is versatile in programming such that it can be maneuvered to follow any physically possible path including crossing over itself and reversal of direction Justification for the research On the residential side, many elderly and disabled enjoy lawn maintenance, but are no longer able to enjoy the satisfaction of maintaining their own lawn due to the physical demands of traditional lawn mowing equipment. These researches (automatic lawn mowers) are very elderly and disabled friendly with the simple. Methodology Automated lawn mower, are mower automatically along the edge of a swath which has been cut within or around an area of uncut grass. That includes a sensor assembly mounted on the front of the mower to detect the edge of the swath by sensing the different in height between uncut grass and the cut grass in the swath. In front of the lawn mower, also got a one touch sensor, that means it will be automatic avoid collision with obstacles along its pathway. Automated lawn mower also can adjustable the cutting tool about 1cm~3cm, this function is let the user choose which height with the grass. This mower using the solar planer to generate the power, and rechargeable lithium battery, let the mower moving more time. Conclusion Automatic grass cutters are environmentally friendly (no petrol, oil or emissions). No need bagging and disposal of clippings is eliminated. It also can healthy and beautiful looking lawn. In addition to environmental protection, also can save user time and money. Chapter 2 : Literature review Most people do not associate air pollution with mowing the lawn. Yet emissions from lawn mowers, snow blowers, chain saws, leaf vacuums, and similar outdoor power equipment are a significant source of pollution. Todays small engines emit high levels of carbon monoxide, a colorless, odorless, poisonous gas. They also emit hydrocarbons and nitrogen oxides, pollutants that contribute to the formation of ozone. While ozone occurs naturally in the upper atmosphere and shields the earth from harmful radiation, ozone at ground level is a noxious pollutant. Ground-level ozone impairs lung function, inhibits plant growth, and is a key ingredient of smog. Each weekend, about 54 million Americans mow their lawns, using 800 million gallons of gas per year and producing tons of air pollutants. Garden equipment engines, which have had unregulated emissions until very recently, emit high levels of carbon monoxide, volatile organic compounds and nitrogen oxides, producing up to 5% of the nations air pollution and a good deal more in metropolitan areas. According to the U.S. Environmental Protection Agency (EPA), a traditional gas powered lawn mower produces as much air pollution as 43 new cars each is being driven 12,000 miles. Among various types of outdoor equipment, lawn mowers are an important contributor to community noise, with the blades contributing up to 50% of noise (Tauro Mann III, 1997). Lawn mowers can be just as loud as leaf blowers. According to the Canadian Hearing Society (1991), lawn mowers can emit 80-96 dB(A) when measured at a distance of three feet. Like gas-powered leaf blowers, gas-powered lawn mowers emit air pollutants. As indicated in Table 4 below, these air pollutants include hydrocarbons, carbon monoxide, nitrogen oxides and particulate matter. These emissions represent less than 5% of the total emissions of these individual pollutants in Canada, except for hydrocarbons, which are nearly 14% of total hydrocarbon emissions (Environment Canada, 1994). Two-stroke lawn mowers tend to be more polluting than four-stroke models. For example, one study found that lawn mowers with two-stroke engines emit hydrocarbons at an average rate in excess of seven times the rate of emission from lawn mowers with four-stroke engines (Priest et al., 2000). Evaporative fuel emissions from lawn mowers are estimated to be 5.8 grams/day (Wong, 2001). Lawn mowers can be more polluting than driving a car. One half-hour of lawn mowing with a typical walk-behind mower produces as much hydrocarbon emissions as driving a 1995 automobile for about 100 miles or 160 kilometres (California Air Resources Board, 2000). A Swedish study found that the emissions produced from a lawn mower engine during one hour of operation were around 4000 ÃŽÂ ¼g/h; this is comparable to driving more than 150 km in a car with a three-way catalytic converter (Christensen Westerholm, 2001). Both lawn mower users and bystanders can be exposed to noise and air pollutant emissions. Figures from Statistics Canada indicate that there were 5,850,000 lawn mowers in Canada in 1985, the majority of which were gas-powered (73.3%). There were comparatively fewer electric (23.9%) and push mowers (2.8%) (Environment Canada, 1994). Most lawn mowers that are available in the Canadian marketplace are imported (Maillette, 2001). According to information obtained from Statistics Canada, 126 walk-behind lawn mowers were imported into Canada during 1996-1999. Figures on domestic production of lawn mowers are not available from Industry Canada (Maillette, 2001). Automatic lawn mower (e.g., lawn mowers) contribute to noise and air pollution that can adversely affect human health and the environment, minimize noise, exhaust and evaporative emissions from lawn/garden equipment and protect public health. Chapter 3 : Concept development and evaluation Timing Belt Belt driver are provides a convenient means for transferring power from one shaft to another. Belt are frequently necessary to reduce the higher rotative speed of electric motors to the lower values required by mechanical equipment. But in this project are contrary, because the cutting tools need a top speed to operate. Normally in industrial, are using two general type of belt driver, v-belt and timing belt (synchronous belt). Since the cost of v-belt is relatively low, the power output of a v-belt system may be increased by operating several belts side by side. All belts in the drive should stretch at the same time rate in order to keep the load equally divided among them. When one of the belts breaks, the entire group must usually be replaced. The drive may be inclined at any angle with a tight side at either the top or bottom. Since belts can operate on relatively small pulleys, large reduction of the speed in a single drive are possible. E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_08 Feb. 12 22.14.gifE:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_06 Feb. 12 21.53.gif Pitch diameter of a pulley P = No teeth on pulley x Drop distance d = Belt contact angle ÃŽÂ ± = arc sin [C = centre distance] Belt fall length fl = Contact length small pulley CL2 = Contact length big pulley CL1 = Belt length L = 2(fl) + CL1+ CL2 Total number of teeth on belt = Big pulley, P1 = No teeth on pulley x = 38 x = 61.4465mm Small pulley, P2 = No teeth on pulley x = 18 x = 29.1063mm Drop distance, d = = = 16.1701mm Belt contact angle, ÃŽÂ ± = arc sin [C = centre distance] = arc sin = 7.87Â ° Belt fall length , fl = = 116.9815mm Contact length small pulley, CL2 = = = 41.7221mm Contact length big pulley, CL1 = = 61.4465 = 104.9601mm Belt length, L = 2(fl) + CL1+ CL2 = 2(116.9815mm) + 104.9601mm + 41.7221mm = 380.6452mm E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_04 Feb. 12 21.49.gif Using micromagic system software determine the belt length. E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_05 Feb. 12 21.53.gif Imperial XL section ht = 1.27mm p = 5.08mm hs = 2.30mm Spur gear E:ycUCTIUC4F1012MEFinal Year ProjNew folderScreenHunter_01 Feb. 15 11.03.gif Spur Gear Formula 14 degree Pressure Angle 20 and 25 degree Pressure angle Addendum, a a = a = Dedendum, b b = b = Pitch diameter, D D = D = Outside diameter, Do Do = Do = Number of teeth, N N = D x P N = D x P Tooth thickness, t t = t = Whole depth, ht ht = ht = Clearance, c c = c = Center distance, C C = C = Working depth, hk hk = hk = Chordal tooth thickness, tc tc = D sin () tc = D sin () Chordal addendum, ac ac = a + ac = a + Diametral pitch, P P = P = Center distance, C C = C = Ball and roller bearings A ball bearing usually consists of four parts: an inner ring, an outer ring, the balls and the cage or separator. To increase the contact area and permit larger loads to be carried, the ball run in curvilinear grooves in the rings. The radius of the groove is slightly larger than the radius of the ball, and very slight amount of radial play must be provided. The bearing it thus permitted to adjust itself to small amounts of angular misalignment in the assembled shaft and mounting. The separator keeps the balls evenly space and prevents them from touching each in the sides, where their relative velocities are the greatest. Ball bearings are made in a wide variety of type and size. Single row radial bearings are made in four series. Extra light, light, medium, and heavy, for each bore, as illustrated in Fig 1

Essay --

The pharmaceutical companies continue to be accused of many unethical practices so the story of pharmaCARE comes as no surprise. The company started with good intentions but went down because of greed. It was a well-established company already famous for its integrity and high quality products. In the beginning, they were believed to enhance the quality of life around the world. The company continued to succeed due to its research and capitalized on a new breakthrough of a diabetes drug that they believed would help slow down the terrible progression of the Alzheimer’s disease. So after a few years, they created a subsidiary called CompCARE to be the â€Å"compounding pharmacy† to make the new drug named AD23. Because of the â€Å"supposed† success of this drug, it was in such high demand that CompCARE became to engage in methods outside the scope of what a compounding pharmacy is allowed to do, their practices pushed the limits and the end result was over 200 cardiac related deaths due to AD23. PharmaCare had several groups of people with stakes in what they had intended to achieve. These stakeholders in this scenario include PharmaCARE and CompCARE, one of its subsidiaries; both companies had high financial stakes in the success of AD23. There was also Wellco, a large drugstore chain, the employees of these 3 companies, the nation of Colberia and its citizens because their livelihood was tied to the success of AD23. Many of the social problems Colberia experienced like the destruction of its environment and consequently endangering of its native species through the company’s extensive activities and business practices came from PharmaCare. The company took advantage of the country’s low standard of living and its economic predicame... ...ng mean. When people are able to make that distinction, they’ll take the time to question themselves, and then question others’ actions including their reasoning and in this case, data rather than blindly accepting their decisions until the true situation comes to light. The failure with pharmaCARE started long before people started dying. PharmaCARE began to fail as soon the company felt it was ok to pay just a dollar a day to the Colberian people who didn’t know and felt they were being helped but instead were being exploited for their knowledge while their environment was being polluted. When CompCARE began to use unethical methods to get AD23 manufactured eventually leading to the deaths of more 200 people. It takes more than a statement â€Å"We CARE about YOUR world ®Ã¢â‚¬  to right the wrongs that all of this greed caused. Their actions must speak louder than words.

What Affects the Rate of Reaction? :: Reaction Rates Energy Science Essays

What Affects the Rate of Reaction? Hypothesis To form a reaction the particles must collide in high speed. The faster the particles collide the more kinetic energy is produced. This produces a bigger reaction. There are five key variables that affect the rate of a reaction (in this case with a solid and a solution): * Change in temperature An increase in heat energy within the particles leads to more kinetic energy. Therefore there is more collision of particles and it increases the rate of the reaction. When we decrease the amount of heat energy, this will evidently slow down the reaction. For example we slow down the process of our food rotting by placing it in a fridge or a freezer. * Change in concentration The concentrations of acids are classed in molars, so 2m would quite a strong concentrated acid, 0.5m would be a very dilute weak acid and 1m would be in between the two. Also, the more concentrated the acid, the more particles it contains, so there is more of a chance for collisions. * Change of particle size Increasing the surface area of the particles would lead to more collision. We do this by making the particles smaller. For instance peeling a large potato would not take as long as peeling four small potatoes; this is because the smaller potatoes have a larger surface area for you to peel. * Pressure (for gases only) Increasing the pressure would bring particles closer together so there would be more of a chance for collision. * Catalyst A catalyst lowers the activation of energy required, consequently there being a faster reaction. The three variables we are choosing to show which effect the rate of reaction in our experiments are: * Particle size * Concentration * Temperature Pressure was inappropriate to use as a variable, because we were not using two gases and a catalyst was unsuitable to use for small tests like these. I think that the tests in changing the temperature will have the fastest times, as the hotter a solution is the more the particles will move and collide, thus the rate of carbon dioxide being produce will be faster. I also think that the large particles test will take the slowest amount of time because of the lack of surface area and the reverse will occur with the test with powered calcium carbonate. Plan We will be running a various number of experiments to prove what effects the rate of reaction with calcium carbonate (marble chips) and hydrochloric acid. The balanced equation for these reactants along with the products: Calcium carbonate + hydrochloric acid calcium chloride + carbon dioxide + water 2 2 3 2

Alcoholism in Youth

Alcoholism in Youth Expectation, are they making things difficult? It seems that what is expected has not been achieved neither been integrated in mind and heart of the youth, being dubbed to as hope of the motherland. Did the famous national hero of ours, Dr. Jose P. Rizal, just had been mistaken with his proposition then? Or, is it because the influential matters in the society that dominates that is why those coined words by him do not materialized? Which is which? We could not escape from the facts that there is a bunch of malignant issues that bound the society. Yes, indeed, reality bites!Such social issues are fatal act into quoting that the youth is slowly killing the final stand of the country’s progress. What is the problem then? Or should I say problems? Alcoholism is considered as a widespread problem in the society since it can harm the individual’s health, relationships and status in life. It is definitely a disease which means an uncontrollable and obsessi ve consumption of alcoholic beverages. It detriments the physical and mental components of a person and causes the brain to change in some point that the person becomes dependent and abusive.The alcoholism in youth is out of subtlety. It is really obvious now! Youths are unstoppable and always thrilled when talking about alcohol. They seem to be excited in the experience and proud in some point when drinking. Actually, the bond between alcohol and youth is really a complicated matter that everybody should need to understand to solve this this legal matter is way over ignorance, then underage drinking is common. Generally, young Filipinos start to drink at the age of 16 or 17. But there are some cases that they drink as young as 12 years old.Family, friends, and the mass media can be influential factors. With this matter, out of school youth could divert themselves seeing them at the end of the day, drinking alcohol and taking up drugs. Pursued by curiosity, they do what is not suppo sed to be done. If these deeds will be tolerated, then there will be just a little hole along the tunnel that will light up the dark pathways of life. It is the same as saying as the case gets worse, the result gets dark. With that they do, they vividly mirror what awaits tomorrow. Then what waits it then?Simple, a day full of miserable undertakings, full of regrets and a day that embraces darkness. In the stage of puberty, there are some huge changes and adjustments that the youths are experiencing and undergoing. These adjustments are crucial that they find the comfort in using drugs and alcohol. We can see that these on-going developmental changes are some factors that should be dealt by them. As they grow and expose to the outside world, peer pressures and thrill seeking activities lead to them to test their limit and their ability to go on what they can see.They try everything and anything even if it is harmful just to be accepted by the society they choose to be a part of. The se causes should be controlled and every youth should seek responsibility on what is morally and legally accepted. Character strength is tested during this kind of stages since every action has its own consequences. As stated earlier, there are so many harmful effects alcoholism can bring. In youths, the most difficult to avoid is the serious drinking problem which may be alcohol dependency or alcohol abuse.When a person starts to drink in a younger age, there is huge possibility that the person will become alcoholic. In a rebellion phase, of course, dangerous behavior can be amplified by alcohol. Since they are used to this kind of actions and environment, they tend to engage in much hazardous move like use of harmful drugs and risky behaviors. Finally, alcohol has an enormous effect in brain and body development. Underage drinkers may suffer and have difficulties in long term memory or critical thinking in later years. Hormonal imbalance will soon be observed which have a negative impact in reproduction.Drinking alcohol is a primitive practice of Filipinos as what history shows. Now we are in a modernized world, but this practice has never been avoided successfully. Alcohol is not really at fault but the person who abuse alcohol. Youths are risky in these abusive actions bu we should not criticize them. Nevertheless, we should be the model and the helpers of these youths as they move towards critical transitions. And at the end, the relationship between the youths and alcohol is not really a mystery. Its solution are not vague and if we just open our eyes wide enough, the solutions are just in front of us.