Types of Belts and Pulleys Research Paper Example | Topics and Well Written Essays - 2500 words

Types of Belts and Pulleys - Research Paper Example These belts are categorized into industrial (narrow, conventional, light-duty and double V cross section), automotive and agricultural. V belts have reinforcing cords in the belt that provide load-carrying capacity. This reinforcement is made of nylon, steel, rayon or glass fibers embedded in a cushion section (soft rubber material). The cushion section is externally covered with tough rubber and the interior is covered with a material that is resistant to abrasion. As the belt bends around the pulley, the length of its pitch line remains the same. The pitch diameter if the pulley is determined using the pitch line (Jadon & Verma, 2010). Flat belts:These types of belts are normally used in applications where high speeds are required or long center distances are involved. Flat belts are more efficient at high speeds compared to low speeds since they tend to slip under load. They are also used where drives which have nonparallel shafts are necessary as they allow twisting to contain th e relationship of the shafts. Positive drive belts:These belts have a notched underside that establishes contact with a pulley with similar design on the circumference. The belts have similar benefits to chain and gear drives because of their positive contact with the pulley. Positive drive belts are appropriate in operations where high efficiency, constant velocity of timing is required. They can also be used to reduce the size of the pulley and provide the same operating performance as large sized V-belt pulleys (Jadon & Verma, 2010).... Pulleys Pulleys are components that are used for power transmission in machines by mounting them on shafts over which belts run. These components are generally made of iron, steel plates or by welded construction. Pulleys may be of a split type or a single piece depending on the application. The types of pulleys can be categorized based on the belts used with the pulley into: a. Flat belt pulleys: These pulleys are of varying shapes and sizes, designed to fit the functional requirements. The main types of pulleys used with flat belts include: Armed Pulley The boss, spokes/arms and rim are the main parts of a pulley. The arms of the pulley are either curved or straight while the cross section is the shape of an ellipse. The rims of these pulleys have a slight convexity to prevent the belt from axial slipping during operation. Pulley with a Web The boss and rim of a pulley are connected with a web in the form of a disk when the diameter of the pulley is very small. Holes are made in th e web to make the pulley lighter. Cone Pulleys These types of pulley are mounted on the driver and driven shafts facing opposite sides to offer varying speed ratios between the two and maintain the speed of the driver shaft at a constant. The steps in the two pulleys have a diameter designed such that one belt can operate on the surface of any pair of steps. This type of pulley is used in drilling machines and lathes. Fast and Loose Pulleys In applications that involve a number of machines operated from one source of power, each machine has a fast and loose pulley configuration. Using this arrangement, any machine can be stopped or started independently while the shaft runs. Using a keyed joint, the fast pulley is mounted on the shaft

What my reason is for wanting to become a nurse Essay

What my reason is for wanting to become a nurse - Essay Example I was a child who attracted stray dogs, a small turtle who wouldn’t eat for a week, a butterfly with a bent wing, and a runaway lizard I tried to comfort while it was re-growing a lost tail. While other children licked cotton candy, I focused on whether zoo animals had enough food and water, so they would be healthy and happy during their confinement. I gave backrubs to anyone in need. I visited a family friend in the hospital and eagerly breathed in the smell and sounds of this place where they fix people. When my mother became pregnant, I participated in preparing the nursery and shopping for our upcoming addition. I made lists of things I would teach the new baby, people we should tell about the baby, and my suggestions for names. Everyone was happy. When he arrived, my baby brother looked different from other babies. I learned he had Down Syndrome. He would be mentally retarded and would not be able to do all the things on my list. He would require help to have a good life. I appointed myself to take charge. I collected information, and I thought maybe I could fix what was wrong, As my baby brother grew into toddlerhood, he seemed tired. He had a congenital heart defect. My family was sad and afraid. We adored him and wanted everything good for him, and now there was a new challenge. I prayed. I gave up things I liked, hoping it would be a trade for things my brother needed. But at 14 months of age, we lost him. I tried to understand how my excellent mind, my love, and enthusiastic efforts were not enough. Eventually I came to understand that helping a person may not always mean fixing them. With my parents’ help, I came to see that my support, love and caring had been just what he needed during his precious, short life. I feel that I was given a gift to make a difference in the lives of people who are ill. I cannot heal every life I come into contact with, but I want to

The Fundamental Challenges of Resource Allocation :: Essays Papers

The Fundamental Challenges of Resource Allocation The budget is a crucial factor in library management. Automation, continuing education, information technology, materials acquisition, personnel salaries, and public relations necessitate funding. Each of these resources is important for any library that wishes to provide excellent services to its employees and patrons. Unfortunately because of poor resource allocation, many library services are phased out or severely cut back. This directly affects the efficiency of the library and also lowers the satisfaction level of the user. There are many ways of how budgets affect a library. A prime example is in the area of personnel salaries. Oftentimes committees have been established to study and implement salary setting policies. However, it can be difficult to gauge the many factors that need to be considered when determining salary issues. Examples of these factors include experience, education qualifications such as an MLS degree or beyond, and the economic situation in the country at the time coupled with the determination of salaries based upon other library institutions (Williams, D.E.. and Garten E.D. 1999). Additionally, the budget can affect both materials acquisition and information technology in the library. The cost effectiveness of certain collections of materials should be considered. For example, government documents are often inexpensive to purchase in contrast to some journals or periodical subscriptions (Smith, D.H. 1993). One must also consider possible sources for the acquisition of materials. Budgeting needs to be taken into consideration when considering how much funding should be allocated for purchasing the material and how much reliance should be placed on donations. The efficiency and cost effectiveness of new technology must also be examined. For example one must consider automatic checkout as compared to circulation checkout. Another consideration that affects IT technology is what operating system the server will utilize to host the World Wide Web. Many libraries use UNIX based information systems to operate their client server network. Continuing education for library employees is another factor that is dependent upon the budget. Different education programs bring with them different costs. These include both money and time. When creating the budget it's important to evaluate the cost and effectiveness of each program. Public relations also are related to the budget. Certain allocations of funds need to be made by the library to market its services to the public. Visibility is important for the library so that people know where it is and what materials it has.

Film Study of the Blind Side

The Blind Side was based on the life of Michael Oher a teenage African American boy whose mother was battling drug and alcohol addictions, in the projects of Memphis Tennessee. Mike as he is know in the movie was in foster care several times and always ran away to his Mother, thinking that no one could ever love him the way his Mother could, even with her ongoing addiction. Mike often slept at his fathers friends home, but even he could not give Mike the support that he desired. He would wash his clothes in the sink at the local laundry mat, and often had to steal food from the local gas station just to survive.When his only caregiver whose couch Michael slept on every night took his own son to a private Christian school to try and get him scholarship to play basketball, the coach of the basketball and football team saw Michael playing and offered to try to get him a scholarship as well. Much to the dismay of the board Coach Cotton was able to convince them to accept Mike on scholars hip. In his first few weeks of attendance at Wingate Christian School Mike walked and took the bus too and from school, until Thanksgiving night a family driving home from a school play saw Mike walking home in the rain with no coat.This would be a major turning point for Michael’s feelings of never being wanted or loved. The Tuohys an upper class white family saw Michael walking and Leigh Ann demanded that her husband Sean pull the car over so she could go and talk to him. Over the next several weeks the Tuohy family offered Mike a place to sleep, new and clean clothes, and a family that cared for him the way a family should. The Tuohys had 2 other children S. J an adolescent boy with a love of football and Lily also know as Collins.When friends of the Tuohys found out that Michael was living with them they were so closed-minded that they said they were worried about Collins well being and safety. Leigh Anne then wanted Michael to become a permanent member of their family an d obtained legal guardianship of Michael. It wasn’t until then that she learned of Michael’s poor grades and family situation. As they got to know Michael more and more they saw his potential and helped him make the football team, S. J was a key role, teaching Michael the ins and outs of everything football.In his senior year Michaels greatness attracted the likeness of several different college football teams who wanted to offer Michael full football scholarships. They then realized that Michael had to get his GPA up in order to be able to attend college. The Tuohys then hired a private tutor Miss. Sue who shared a love for Ole Miss football just as big as their own. Miss. Sue helped Michael realize that he had potential for being great. During the courting between football teams, Michael had decided that he wanted to play for Ole Miss just as his adopted father had.Michael would graduate and then become involved with the NCAA investigation, where the NCAA would quest ion his reasoning to attend Ole Miss because of donations that were given by the Tuohys over the years. In the end Michael and Miss Sue would both be attending Ole Miss, Miss. Sue as his own personal tutor. Michael Oher would then go on to be drafted by the Baltimore Ravens in the first round of the draft. The film The Blind Side was both based on a true story, and also a book that was written by Michael Lewis in 2006. The movie was released in 2009 and quickly became a hit and an inspiration to foster children around the country.According to Michael Oher, the movie was not completely as it happened, for example S. J didn’t have to teach him the ins and outs of football, he knew everything about football before he came to live with the Tuohys. But for the most part the movie was accurate over all. In one scene Leigh Anne was having lunch with her friends at a high-end restaurant, her friends questioned her reasoning for taking Michael in with racial undertones, and inappropri ate comments. I have personally been to the Deep South and the Midwest seems to fit this role better, snooty over privileged white women with a chip on their shoulder.I feel as if this scene would have been more historically accurate 20 years ago, but there are racially insensitive people all over, some just hide their insensitiveness better than others. Another scene was where in Michael’s first football game, the referees only threw flags on plays that he made, when there was no reason for a flag to be thrown. This I feel is very accurate historically, football and the South are hand in hand, and anything out of the ordinary or anything that threatens a team will not go overlooked by anyone.The referees most likely felt that Michael had an advantage over the other players just because he was African American, not knowing that a few weeks prior Michael couldn’t even tackle another player, and still had to think that the person he was to tackle was a threat to his fami ly. After reading different reviews from this film, I’ve chosen two different reviews one from the Washington Post and the other from Variety. Each review gives the movie at least 3 out of 4 stars but for different reasons. Firstly the WashingtonPost. om, they gave the movie 3 out of 4 starts, but open the review with a very negative view of the advertisements for the movie â€Å"There's been something off-putting about the ad campaign for â€Å"The Blind Side,† a drama about a white woman who adopts an African American high school student, from trailers trafficking in nearly every troubling African American stereotype in movies (from the Magical Negro to the surly low-level bureaucrat), to posters featuring the patronizing image of Sandra Bullock gently leading her looming, gentle giant of a son down a football field. The Washington Post feels that The Blind Side does a good job of depicting Oher's good fortunes and the Tuohys ability to cross-racial boundaries in th e Deep South. The next review from Variety. com only saw the good aspects of the movie and gave it 4 out of 4 stars. â€Å"It's difficult to imagine anything that could long impede or contain the force of nature that is Leigh Anne Tuohy, the feisty Memphis belle played by Bullock with equal measures of acerbic sass, steel-willed brass and unabashed sentiment.Bullock is thoroughly convincing in the role — right down to her credible accent and the blonding of her normally brown tresses — and she's not afraid to occasionally keep auds guessing as to whether Leigh Ann's actions are driven by a heart of gold or a whim of iron. † Variety sees Leigh Anne as a loving foster/adoptive mother, who despite her social status and her seemingly tough exterior finds it in her heart to take Michael in and accept him as one of her own.The only negative comment they have about this film is that it seems as if nothing could ever go wrong until the final part of the movie, I suppose they saw this as being slightly overly optimistic in a world filled with pessimists. This film is a perfect choice as it relates so much to this class, not only does it cover racism but also it shows that those boundaries can be thrown out completely. A white upper class family who takes in an African American boy seems like something that would be straight out of a book; to cross such a deep seeded line took courage and determination on the part of the Tuohy family.They were proud of what they did and who Michael was/is as a person and didn’t choose to see him as a color but as a teenage boy who needed help, their help. If ever there was a story of over coming ones background this is it. This movie is a great way to show children that people are people no matter the color of their skin, and that everyone should have a family who cares for them no matter what. This would actually be a great section to have in the textbook about transcending racial barriers, and over coming s tereotypes, and it’s a true story to top it off.Both my wife and I watched this movie and on several occasions we both welled up, it’s one of those movies that just make you feel good, and make you want to do good. There were several scenes that made this movie great and choosing just a couple of them has taken careful deliberation on my part. The first scene that really hit me the hardest was when Big Mike was walking down a dark raining street and the Tuohys were driving home from the play on Thanksgiving, they saw him without a coat walking in the cold.Leigh Anne told her husband to stop the car and she got out to ask him where he was going and if he had a place to stay, after figuring out that he was homeless she told him to get in the car and that he was coming with them. I know there are some many kids out there whose parents simply don’t care about them and they have to raise themselves, but seeing it and knowing it are two different things. I can honestl y say that if I was in this situation I would have done the same thing and I know that my wife would make sure I did.The next scene is at the end of the movie when they brought Michael to Ole Miss to start his first semester of college, Leigh Anne was too strong to ask Michael for a hug, and she didn’t want him to see her cry so she gave him a nod and a slight side hug and told everyone to say their goodbyes and she walked back to their car, Michael then looked at Sean and asked him what was the matter, he replied â€Å"She’s like an onion you have to peal back her layers slowly†.Hearing this Michael then walked over to the car and said to her â€Å"Momma, I need a proper hug. †. This is the one scene that got me to well up, I know how it feels to want to show a softer side but not have the courage to show it. I face this on a daily basis with my two sons, so to see someone being so exposed and vulnerable was a perfect way to end this movie. I really do t hink that this movie is a perfect learning tool for children to show them that color is just something your eyes see, it has nothing to do with what’s on the inside.

Review Of Anatomy Of A Murder Essay - 1574 Words

In our world today much of how we relate to things has to do with what we see in the media. We base our views of people and places on what we see on television and in movies and less on our personal experiences. Media has lead a powerful role in shaping the way we think about our legal system and the legal actors in it such as lawyers. Movies such as Anatomy of a Murder (1959) and Philadelphia (1993) were both made in largely different times in history and give different views of the way the media has portrayed lawyers throughout time. Anatomy of a Murder is a movie set in a small town in the upper peninsula of Michigan. Paul Biegler (James Stewart) is portrayed as a humble small-town country lawyer that spends his extra time fishing. Once the former district attorney, Paul Biegler now runs his small law office out of his home with his secretary Maida Rutledge (Eve Arden). Paul’s colleague and friend Parnell McCarthy (Arthur O’Connell) is portrayed as an alcoholic but chooses to become sober once a great opportunity comes to their small town. One afternoon Paul Biegler is contacted by the wife of US Army Lieutenant Frederick Manion (Ben Gazzara), Laura Manion (Lee Remick). Lieutenant Manion has been arrested for the first-degree murder of a local barkeep Barney Quill. While Lieutenant Manion does not deny the murder, he claims that Quill raped his wife. During the interview with Paul Biegler, Lieutenant Manion came across as violently possessive and jealous.Show MoreRelatedSummary Of Raymond Bonners Anatomy Of Injustice1546 Words   |  7 Pages For my second essay, I chose to critique Raymond Bonner’s Anatomy of Injustice. It was published in 2012 in the United States by Alfred A. Knopf, a division of Random House Inc. I thoroughly enjoyed this book. It goes into the profound problems with the Death Penalty in criminal justice. 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The boy was strangled; a sign of rage and power issues, and a locket containing his mothers picture was stolen. Shelley keeps her story very close to home, one family member to another, except that Justine is innocent. The murder, as Victor knew at once, was committed by his progeny. The family is devastated, Justine is tried and convicted, andRead MoreThe Changing Context of Nursing Essay examples1635 Words   |  7 Pagesin waiting; this has become very popular in film and media (Daly, Speedy, Jackson, 2014, p. 57). For example, studies were conducted for nursing students to assess the effect on the image of nursing in the media, 55% revealed they watched Grey’s Anatomy on a regular basis; the consensus was that nurses viewed on these shows were reflected in a negative way impacting on the image the public expect (Weaver, Salamonson, Koch, Jackson, 2013, p. 2639). However it is not just the media, current doctors

Battle of Britain - World War II

How The Internet Has Impacted Information Privacy

How the Internet has impacted Information Privacy Information privacy is referred to as data protection. It entails the existing relationship of gathering and spreading of the information, public expectation of privacy, technology and the legal circumstances pertaining to data privacy. Personal information consists of political records, financial data, website data, medical records, business related information and criminal records among others. With the evolution of technology and the internet, there have been upcoming concerns concerning information privacy. The internet has increased the level of information that can be gathered and analyzed. Over the last decade, there have been groundbreaking improvements in technology which have enhanced whet people can d with the technology at any given time. For instance, through the use of the internet, one can use global system positioning system locators to acquire real time data about a person or object’s movement and speed. This was not nearly possible thirty years ago. Another example is that cell phones embedded with E-911 services can be used to locate an individual’s precise location (Waldo, Lin and Millett, 2007). Such devices are mostly used by parents to monitor their children’s whereabouts. Figure 1: The estimated cost of cybercrime Given the large memory chips, the presence of the internet, fast processors and the recent fast browsing capacity, it has been cheaper to store large quantities of data in the long term.Show MoreRelatedSocial Media, Why People Catfish, And Why Talking Over The Internet Essay1407 Words   |  6 Pagesand mainstream use of the internet to access information in 1990, the way people interact with each other has changed. Social media has opened up new mediums for people to communicate with each other. People exchange messages on Facebook, post tweets on Twitter, and â€Å"selfies† on Instagram. These new mediums have also changed the way people find romance and love. 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In other words, he meant that the internet is helpful to us, in every way, from getting the information around the world to getting connected with everyone. The world today is an age of internet where there is life in and outside of the web. The internet is very powerful and convenient, so that it has