DOZIER industri Essay

Richard Rothschild, the chief financial officer of Dozier Industries, returned to his office after meeting with two officers of Southeastern National Bank. He had requested the meeting to discuss financial issues related to Dozier’s first major international sales contract, which had been confirmed the previous day, January 13, 1986. Initially, Rothschild had contacted Robert Leigh, a vice president of the bank, who had primary responsibilities for Dozier’s business with Southeastern National. Leigh, feeling that he lacked the international expertise to answer all the questions Rothschild might raise, had suggested that John Gunn of the bank’s International Division be included. The meeting had focused on the exchange risk related to the new sales contract. Dozier’s bid of (British pounds) GBP1.175 million to install an internal security system for a large manufacturing firm in the United Kingdom had been accepted. In accordance with the contract, the British firm had transferred a 10% deposit (GBP117,500), the balance due when the system was completed. Dozier’s production vice president, Mike Miles, had assured Rothschild that there would be no difficulty in completing the project within the 90-day period stipulated in the bid. As a result, Rothschild was planning on receiving GBP1.0575 million on April 14, 1986. Company History Dozier Industries, a relatively young firm specializing in electronic security systems, was established in 1973 by Charles L. Dozier, who was still president and the owner of 78% of the stock. The remaining 22% was held by other members of management. Dozier had formerly been a design engineer for a large electronics firm. In 1973 he began his own company to market security systems and began by concentrating on military sales. The company experienced rapid growth for almost a decade. But in 1982, as Dozier faced increased competition in this market, management attempted to branch out to design systems for small private firms and households. Dozier’s  inexperience in this market, combined with poor planning efforts, slowed sales growth and led to a severe reduction in profits (see Exhibit 1). The company shifted its focus to larger corporations and met with better success. In 1985, the company showed a profit for the first time in three years, and management was This case was prepared by Professor Mark R. Eaker. It was written as a basis for class discussion rather than to illustrate effective or ineffective handling of an administrative situation. Copyright  © 1986 by the University of Virginia Darden School Foundation, Charlottesville, VA. All rights reserved. To order copies, send an e-mail to sales@dardenbusinesspublishing.com No part of this publication may be reproduced, stored in a retrieval system, used in a spreadsheet, or transmitted in any form or by any means—electronic, mechanical, photocopying, recording, or otherwise—without the permission of the Darden School Foundation. ââ€"ŠÂ  confident that the company had turned the corner. Exhibit 2 contains the balance sheet at the end of 1985. The company’s management believed that sales to foreign corporations represented good prospects for future growth. Consequently, in the spring of 1985, Dozier had launched a marketing effort overseas. The selling effort had not met with much success until the confirmation of the contract discussed previously. The new sales contract, although large in itself, had the potential of being expanded in the future because the company involved was a large multinational firm with manufacturing facilities in many countries. Foreign Exchange Risk and Hedging On January 13, the day the bid was accepted, the value of the pound was (U.S. dollars) USD1.4480. But the pound had weakened over the previous six weeks  (see Exhibit 5). Rothschild was concerned that the value of the pound might depreciate even further during the next 90 days, and it was this worry that prompted his discussion at the bank. He wanted to find out what techniques were available to Dozier to reduce the exchange risk created by the outstanding pound receivable. Gunn, the international specialist, had explained that Rothschild had several alternatives. First, of course, he could do nothing. This would leave Dozier vulnerable to pound fluctuations, which would entail losses if the pound depreciated, or gains if it appreciated versus the dollar. On the other hand, Rothschild could choose to hedge his exchange risk. Gunn explained that a hedge involved taking a position opposite to the one that was creating the foreign exchange exposure. This could be accomplished either by engaging in a forward contract or via a spot transaction. Since Dozier had an outstanding pound receivable, the appropriate hedging transactions would be to sell pounds forward 90 days or to secure a 90-day pound loan. By selling pounds forward, Dozier would incur an obligation to deliver pounds 90 days from now at the rate established today. This would ensure that Dozier would receive a set dollar value for its pound receivable, regardless of the spot rate that existed in t he future. The spot hedge worked similarly in that it also created a pound obligation 90 days hence. Dozier would borrow pounds and exchange the proceeds into dollars at the spot rate. On April 13, Dozier would use its pound receipts to repay the loan. Any gains or losses on the receivable due to a change in the value of the pound would be offset by equivalent losses or gains on the loan payment. Leigh assured Rothschild that Southeastern National would be able to assist Dozier in implementing whatever decision Rothschild made. Dozier had a USD3 million line of credit with Southeastern National. John Gunn indicated that there would be no difficulty for Southeastern to arrange the pound loan for Dozier through its correspondent bank in London. He believed that such a loan would be at 1.5% above the U.K. prime rate. In order to assist Rothschild in making his  decision, Gunn provided him with information on interest rates, spot and forward exchange rates, as well as historical and forecasted information on the pound (see Exhibits 4, 5, and 6). Rothschild was aware that in preparing the bid, Dozier had allowed for a profit margin of only 6% in order to increase the likelihood of winning the bid and, hence, developing an important foreign contact. The bid was submitted on December 3, 1985. In arriving at the bid, the company had estimated the cost of the project, added an amount as profit, but kept in mind the highest bid that could conceivably win the contract. The calculations were made in dollars and then converted to pounds at the spot rate existing on December 3 (see Exhibit 3), since the U.K. company had stipulated payment in pounds. Rothschild realized that the amount involved in the contract was such that an adverse move in the pound exchange rate could put Dozier in a loss position for 1986 if the transactions were left unhedged. On the other hand, he also became aware of the fact that hedging had its own costs. Still, a decision had to be made. He knew that no action implied that an unhedged position was the best alternative for the company. Exhibit 1 DOZIER INDUSTRIES (A) Sales and Income Summary Year Ended December 31 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 Sales (in thousands) 456 631 890 1,610 3,860 7,242 11,338 15,138 20,371 21,455 22,501 23,986 25,462 Net Income (in thousands) 41 54 73 151 324 760 1,162 1,488 1,925 712 (242) (36) 309 Exhibit 2 DOZIER INDUSTRIES (A) Balance Sheet as of December 31, 1985 Assets Current assets: Cash and securities Accounts receivable Inventories Total current assets Properties, plants, and equipment: At cost Less: Accumulated depreciation Net plant Other assets: Investments and loans Total assets Liabilities and Equity Current liabilities: Accounts payable Notes payable – bank Total current liabilities Long-term liabilities: Notes payable Common equity: Common stock Reserves Retained earnings Total equity Total liabilities and equity USD294,572 1,719,494 2,227,066 4,241,132 8,429,812 2,633,404 5,796,408 450,000 USD10,487,540 934,582 652,800 1,587,382 550,000 2,253,410 627,244 5,469,504 8,350,158 USD10,487,540 Exhibit 3 DOZIER INDUSTRIES (A) Bid Preparation Materials Direct labor Shipping USD847,061 416,820 70,000 Direct overhead* 208,410 Allocation of indirect overhead 100,492 Total cost Profit factor 1,642,783 USD98,567 Spot pound rate on December 3: USD1.4820 Pound value of the bid: GBP1,175,000 * Based on 50% of direct labor. Exhibit 4 DOZIER INDUSTRIES (A) Interest and Exchange Rate Comparisons January 14, 1986 Three-month money* Prime lending rate Three-month deposits (large amounts) EUR/USD 3-month (LIBOR) EUR/USD 3-month (Paris) 3-month treasury bills in London United States United Kingdom 7.65 13.41 9.50 13.50 8.00 12.90 8.3 13.2 12.2 The spot rate for the pound: USD1.4370 Three-month forward pound: USD1.4198 * Prime commercial paper in the United States; Interbank rates in the United Kingdom. Source: The Economist. Exhibit 5 DOZIER INDUSTRIES (A) Historical Spot and Forward Pound Rates in U.S. Dollars 7/9/85 7/16 7/23 7/30 8/6 8/13 8/20 8/27 9/4 9/10 9/17 9/24 10/1 10/8 10/15 10/22 10/29 11/5 11/12 11/19 11/26 12/3 12/10 12/17 12/23 12/30 1/7/86 1/14/86 Spot 1.3640 1.3880 1.4090 1.4170 1.3405 1.3940 1.3900 1.3940 1.3665 1.3065 1.3330 1.4200 1.4120 1.4155 1.4120 1.4290 1.4390 1.4315 1.4158 1.4320 1.4750 1.4820 1.4338 1.4380 1.4245 1.4390 1.4420 1.4370 Source: Chicago Mercantile Exchange Statistical Yearbook. 3-Month Forward Rate 1.3490 1.3744 1.3963 1.4067 1.3296 1.3828 1.3784 1.3817 1.3553 1.2960 1.3226 1.4089 1.4005 1.4039 1.4007 1.4171 1.4270 1.4194 1.4037 1.4200 1.4628 1.4704 1.4214 1.4249 1.4114 1.4260 1.4284 1.4198

Marriage vs Civil Unions Essay

Gay marriage is a controversial and often heated topic in American society and often so elsewhere throughout the world. Homosexual behavior is not new. Homosexual behavior and the homosexual lifestyle have been around throughout recorded history, certainly for thousands of years, in fact, was socially condoned in some societies. In Ancient armies, it was often accepted because a man was more apt to fight for a lover than for a casual acquaintance. For example, unlike today’s military, in Ancient Greece, homosexual relationships between soldiers were viewed as a means to intensify the fighting spirit of the soldiers and strengthen the bond between them. (Burg et al. , 2002) Only recently did interest in issues of sexual orientation move from the realm of the social sciences into other areas of science. Freud believed that there was some degree of bisexuality in all humans (Bell and Weinberg, 1978). He and other psychologists of his time believed that homosexuality could be explained by the experiences a person had while growing up, thus focusing on environmental explanations for homosexual behavior. Psychologists once pursued the study of homosexuality in an effort to prove that it was an abnormal behavior, but such studies have now led researchers to conclude that homosexuality is somehow linked to the individual experiences and environment a person has while growing up. While this may be the general view of homosexuality in psychology, my experiences with homosexuals are not consistent with this view. The few individuals I’ve known who were homosexual coexisted in the same environment as everyone around them, but their homosexual tendencies were obvious throughout their lives. Today we realize that if environment plays a role in homosexual tendencies, environment is not the entire explanation. Now we know that genetics and biology also play a role. No matter what biological and genetic studies show, there can be little doubt that opponents of gay marriage and the gay lifestyle will only accept that the gay marriage is some kind of sickness or perverted behavior. While homosexual behavior is obviously out of the norm, there is no scientific research or evidence to suggest that is it either perverted or abnormal. Despite what opponents might claim, our view of homosexuals and our denying them the right to marry is no more than a form of discrimination—irrational, illegal, biased and illogical. Regardless as to how a person views same sex marriage, there is no rational or logical reason to ban it or to discriminate against it except for personal preference/choice. Genetic Studies, Biology and Environment It is important to consider the biology and genetics behind homosexual behavior. If people insist that homosexual behavior is a matter of personal choice when evidence exists to demonstrate genetic and biological factors are involved, their insistence shows and irrational bias against homosexuals based on prejudice and discrimination. Today, most researchers view that a person’s sexual orientation is dictated by a combination of environmental, biological and psychological factors. Recent studies suggest that both biology and genetics play a role in homosexual behavior. Studies suggest that a genetic factor passed from mother to son might contribute to homosexuality in men and that male homosexuality might have a very different genetic influence from female homosexuality. (Pattatucci et al, 1995, Bailey et al. , 2000) Studies of homosexuality in families and between twins suggest that male and female sexual orientation may not have the same genetic influences. (Bailey et al. , 2000) Animal studies reveal that sexual orientation can be influenced by altering the hypothalamus. (Cherry & Baum, 1990), Much of the available genetic data on homosexual behavior suggests that biological and genetic factors are involved. Some studies have focused on X chromosome since males have an XY chromosome and females have an XX chromosome. One study concluded that the gene that influences homosexual behavior is carried by the mother. Heterosexual females appear to pass the Xq28 gene sequence on the X chromosome to their sons. (see below, Hamer et al, 1993) This study focused on homosexual males, and thus, their findings may not be a reflection on homosexual females. When the results of genetics studies are taken together, the most reasonable conclusion is that genetics can account for at least 50 percent of a person’s sexual orientation. In general, genetic studies of homosexuality demonstrate that homosexual behavior and the homosexual condition is a result of genes. When male homosexuals were studied, the data of one study demonstrated that most of the homosexual men arose from a genetic factor that was passed down from mother to son. (Hamer et al, 1993) Dean Hamer of the National Cancer Institute in Washington, D. C. discovered that homosexual brothers are more than heterosexual brothers to inherit the same genetic sequence, referred to as Xq28, on a region of the X chromosome. This suggests that genetics are involved in homosexual behavior although only a region on a gene, not a specific gene, has been identified. The degree of gene influence is unclear. Studies of twins and also of the adoptive brothers of homosexual men reveal a relationship between genetics and homosexual behavior. (Bailey and Pillard, 1991) Thus, the evidence suggests that genetics and biology rather than environment or personal choice gives rise to homosexual behavior and the homosexual condition. Other studies have demonstrated anatomical differences between components of the brain structures of heterosexual and homosexual males. (LeVay, 1991) These are important considerations when we begin to look at the legal questions surrounding homosexual behavior. Thus, discriminating against gay individuals is just as irrational, irresponsible and illegal (or should be just as illegal) as discriminating against an individual on the basis of the color of his or her skin. Furthermore, it should be easier to decide the legality of mistreating people on the basis of the sexual preference than on the basis of their religious preference since religious preference is a matter of personal choice rather than genes. Why, then, is it illegal to discriminate against an individual on the basis of their religion while the legal issues surrounding homosexual behavior are often viewed as unclear? While there may be compelling reasons to favor heterosexual unions over gay marriages, there is actually no unbiased reason to forbid gay marriages. In fact, even favoring heterosexual marriages is a form of discrimination similar to favoring whites over other races. Certainly, the heterosexual situation constitutes the â€Å"normal† or â€Å"typical† interaction between sexes, but considering that biological and genetic studies demonstrate that homosexual situations are dictated by actual biological and genetic factors, there is no rational reason to view such unions as â€Å"unnatural† or â€Å"abnormal†. We cannot even say with certainty that they are an abnormality as much as a biologically dictated variation, not necessarily even rare, just different. While we can â€Å"prefer† heterosexual marriage over gay marriage as a society, there is no rational reason to deny gay marriage or to restrict homosexual individuals to civil unions while denying them a typical marriage (as will be discussed) other than bias. Although theories exist to suggest that environment contributes to and influences the gay lifestyle, it is not clear how this could be true. For example, if biology and genetics contribute to â€Å"at least 50 percent† of gay behavior, why is it that a homosexual male or female raised in the same environment with a heterosexual male or female gives rise to one homosexual individual and one or more (generally a host) of heterosexual individuals? If the environment helped to cause the homosexual behavior, why aren’t there more homosexuals in that environment? To my knowledge, this question has never been addressed or even asked. Likewise with Freud’s idea that childhood experiences contribute to homosexual behavior. While no two individuals have the same childhood experiences, in part because everyone responds differently to the same experiences and environment, two individuals treated the same and raised in the same environment does not lead one to conclude that the differences in their behavior is caused by their childhood experiences or their environment. Biological factors, genetics and internal psychological factors must play a significantly more crucial role in their behavior than do environment and/or childhood experiences. Marriage vs. Civil Union Now that we have briefly reviewed the biological and genetic data to suggest that homosexuality is a genetic and biological condition, at least in part, rather than a matter of personal choice, we are more prepared to consider the legal factors involved with this issue. In states where marriage is allowed between same sex couples, the individuals involved are generally placed on an uneven playing field. Even though they may be allowed to join in a legal union, they are restricted to a civil union rather than a legally recognized marriage. What is the difference and why is this distinction yet another example of social discrimination? Today, gay couples may unite in civil unions but such unions differ from the marriage granted to heterosexuals in a number of crucial ways. Although a civil union grants many rights that would be denied without it, it fails to grant hundreds of others. Furthermore, marriage is universally recognized everywhere while civil unions are not. Civil unions fail to resolve many financial matters, tax issues, insurance concerns, pension protection, Medicaid and even matters such as filing and filling our forms. Another concern arises if those joined in a civil union desire to dissolve their union. They have no means to legally terminate their union unless they live in a state that recognizes it. In fact, at present, only Vermont qualifies for this termination. A Vermont law states that â€Å"Parties to a civil union shall have all the same benefits, protections and responsibilities under law, whether they derive from statute, administrative or court rule, policy, common law or any other source of civil law, as are granted to spouses in a marriage. † One must wonder why there is a need to make such a statement. If there is no discrimination based on sexual orientation, there certainly is no need for this added point of clarification in the law, so obviously, something is amiss. Much of the controversy about and distinction between â€Å"marriage† and â€Å"civil union† boils down to religious issues. In general, Christians are against gay marriage. Therefore, at some level, the issue also involves religious issues and the separation between church and state, religion and politics. While gay marriage is an issue that Christians feel goes against the principles of the Bible, other religions use other holy books and, as a result, do not base their opinions on or form their ideas from the Bible. Although the legal view is that there are no substantial differences in the treatment of a marriage and a civil union, each represents a separate legal category with significant, sometimes glaring differences that only become of concern when they matter the most. While the U. S. Constitution requires legal equality for all regardless of sexual orientation, among other factors, that legal equality exists largely on paper rather than in fact. Clearly, those individuals forced into civil unions rather than typical marriages are not on even playing ground. Civil Unions are a step forward, but they fall short of being satisfactory. Our present approach to force gay couples into civil unions rather than true marriage, perhaps, is as unjust as the former laws that denied interracial marriage. In order to give gay couples true rights, laws must eliminate the idea of civil unions and allow gay couples to form true marriage so as to give them all of the rights and privileges recognized in marriage. We cannot continue to tolerate â€Å"civil unions† as the satisfactory answer to granting unions between individuals who desire to live as a couple. Just as we moved away from banning interracial marriage, we need to move away from banning gay marriage. We have only emotional and no rational reasons to do otherwise. We have pointed out above that if the biological factors, genetics and internal psychological factors play any role at all in homosexual behavior, that role must be relatively trivial. Therefore, discriminating against gay individuals in any manner such as by relegating them to civil unions rather than allowing them to unite in true marriage, for example, is nothing more than unjustified discrimination and bias just as unjust as denying interracial marriage. We must move away from this and other unfair treatments and practices. Continuing to insist that homosexual behavior arises from environment, childhood experiences or personal choice with that belief but no supporting evidence even though there is clear evidence to the contrary is nothing more than further bias and discrimination against homosexuals. While homosexual behavior is clearly different from the norm, there is no real evidence that it is abnormal any more than being black in a society that is 12 percent black and 88 percent white and other means that blacks are abnormal. Faulty logic in the absence of supporting evidence does not justify, prove or support an incorrect conclusion.

Evidence Base Practice

Discuss how evidence -based practice is applied in your practice setting and describe the desired outcome achieved through this approach. â€Å"Evidence-based practice is an interdisciplinary approach to clinical practice†.(â€Å"Evidence-based practice,† ) Its purpose is to improve the quality of patient care and patient outcomeIn critical care unit the area in which I practice, evidence based practice is implemented for reduction and prevention of critical illness such as neuromyopathy. To accomplish this, a supportive treatment approach has been implemented. The treatment of all sources of inflammation is aggressively executed. Potentials for infections is addressed by early removal of Foley’s, discontinuation of iv lines when no longer needed, Peripheral iv changed every 72 hours, and picc lines are removed when it is evident that the patient is febrile for 24 to 48 hours. Another treatment approach is early weaning of patients on mechanical ventilator.The en tire interdisciplinary team is involved in a mobility plan for all patients admitted on the unit. Early weight-bearing and ambulation is encouraged. Control of schedule for mobilizing patients out of bed is the responsibility of members in the physical therapy department. Each patient may be up for about two hours, the number of patients to be up and the time they should be up is posted for both day and night shifts. For vented patients, the Respiratory therapist, the nurses and the nursing assistant together as team is responsible for getting these patients out of bed. Strict attention is placed on the patient’s nutrition in order to restore muscle mass. Critical illness neuromyopathy is a major complication in critical care unit patients, affecting peripheral nerves muscles and neuromuscular junction, resulting in muscle weakness and paresis.â€Å"Early mobilization or kinesiotherapy have shown to result in muscle weakness reversion in critically ill patients. This provide s faster return to function, reducing weaning time, and length of hospitalization†. (Pattanshetty and Gaude) This treatment regime has been in effective from the beginning of 2013 and according to reports given at weekly interdisciplinary meeting there has been marked improvement in patient outcome. The weaning process is less prolonged. Patients have less functional disability and there has been a decline in the infection rate.

Film Studies Essay Example | Topics and Well Written Essays - 1000 words

Film Studies - Essay Example The film Amelie begins with an omniscient narrator detailing the likes and dislikes of Amelie’s parents providing insight into Amelie’s formative childhood that led to her introspective personality. Both parents eschew touching. For example, the father hates his swimming costume sticking to his legs and the mother hates when someone brushes her hand. Although the child-Amelie craves physical affection, her father only touches her once a month with his stethoscope during her check-up. Excited by this contact, Amelie’s heartbeat quickens causing her father to diagnose her with a heart condition that causes her to become home schooled by her neurotic mother. Amelie develops into an extraordinarily imaginative child whose only friend is a suicidal goldfish. Yet, Amelie is not simply a recluse; she shows a spark for something more in her life. She craves tactile pleasure eating raspberries from her fingertips, pulling â€Å"glue skin† from her finger, running h er finger around a wineglass top, or plunging her hand into a sack of beans. She also demonstrates an ability to feel her interconnectedness with society at large as well as a bit of fire for harmless revenge. When a nasty neighbor tricks Amelie into believing that her taking photographs lead to a car accident and other citywide accidents, she innately believes in her ability to connect with others in this unseen, spiritual way. Yet, once she realizes the neighbor’s trick, the cheeky Amelie revenges the avid football fan by unplugging his TV at pivotal match moments. Quite opposite to Amelie’s solitary upbringing, her future love Nino suffered a fate much like Oskar from Let The Right One In as classmates bully both. Of course, Nino’s bullying is slanted towards humor, yet Oskar’s world of isolation is far more detrimental, sad, and violent. Oskar’s divorced mother and father seem completely disconnected from their son. Oskar retreats into an imagi nary world where he is the tough bully threatening and debasing weaker boys. The film opens with the prepubescent Oskar standing shirtless holding a small knife commanding an unseen foe to â€Å"Squeal like a pig† (Lindqvist). Oskar is attempting to reverse the power relationship between himself and the bullies by inventing his own bully identity within the mirror image reflected in his apartment window. Of course, neither Oskar nor Amelie’s identities remain unchanged by their films’ conclusions. Within Amelie’s world, hearing the shocking report of Lady Diana’s death causes Amelie to drop a bottle top that nocks loose a tile revealing a long lost box of a child’s treasures. Frances notes â€Å"Princess Di, often referred to in the film†¦represented for the collective, heart values that lie in the shadow of cultures† (2003). Inspired to find the owner and become an agent of kindness, Amelie enters a manic world where characters drives plot and plot drives characters. Riding the maze-like subway, Amelie locates the owner, who is so touched by this anonymous gift that he vows to reconnect with his daughter to meet his grandson. Just as characters incite change within each other in Amelie’

Quiz Research Paper Example | Topics and Well Written Essays - 750 words - 1

Quiz - Research Paper Example Allen transferred the possession of the car to the parking garage, while he retained the ownership of the car. The relationship established between Mr. Allen and the Hyatt Regency-Nashville parking garage is not a gift relationship. This is because, it is only the possession of the car which was transferred from Mr. Allen to the parking garage, while the formation of a gift relationship requires that both the ownership of the chattel or property is also transferred, when the possession is transferred from the owner of the property to the trustee (Powell, 273). There are several conditions that must be fulfilled for the establishment of a bailment relationship between the owner and the possessor of the property, for the relationship to qualify as a bailment. First, it is required that the bailee (possessor) of the property must intend to posses the property or the chattel (Powell, 272). Secondly, it is required that the bailee(possessor ) must actually and physically possess the property or chattel that has been transferred from the owner, as opposed to the gift relationship, where the physical chattel can remain with the owner, but the rights and ownership transferred to the trustee (Powell, 272). Therefore, according to the facts of the case Allen V Hyatt Regency-Nashville, a bailment relationship was created between Mr. Allen and the Hyatt Regency-Nashville parking garage, considering the fact that the parking garage had indicated the intention to possess the car parked by Mr. Allen, through the notice "Welcome to Hyatt Regency-Nashville" together with a sign marked "Parking." This way, the public was invited to utilize the parking, an indication of the intent of the commercial parking garage to possess the car. Secondly, the facts of the case meets the second requirement of the law for the fulfillment of a bailment providing that the property or the chattel must be physically possessed by the

Ethics, professionalism and contemporary Issues Essay

Ethics, professionalism and contemporary Issues - Essay Example This makes them easy targets to forced labour and prostitution; the main countries in which this vice of human trafficking is rampant includes India, Mexico, El Salvador and Philippines. There is an estimated ten thousand forced labourers in the U.S. prostitution, poverty; globalization and government corruption are some of the major factors that contribute to the high numbers in human trafficking. Several laws have been passed to try and curb human trafficking and under the U.S code human trafficking is termed as a federal crime. Technology, which generally covers; mobile devices, internet and social media has been instrumental in human trafficking, it has played both a negative and a positive role. The beauty of technology is that it provides better visibility and can help in tracing of people who are involved in human trafficking (Hart 5). Technology has contributed to human trafficking by making it easier for the criminals to advertise and sell their victims. When one searches in the internet, it is very easy to find underage victims who are exploited for sex under online classifieds. In the pornography websites, one will find a section for teen prostitutes; it is then made easier for both parties, the one advertising and the one looking for services to communicate using mobile phones. Social networking sites are also another venue for advertising for victims of human trafficking because it is very easy to reach a large number of people. Technology has also made it easy to search for and purchase victims. Using the internet to find and locate people has never been easier (Davidson and Gottschalk 98). Once the contacts needed have been found, they then proceed to use the other types of technology such as instant messaging, emails and so forth to reach the people concerned. On the other hand, technology has made it simple to track the criminals involved in human trafficking, as it is possible to trace the individuals concerned by following the activities they have been doing online. Moreover, tracing their phone calls, messages and emails, and past data on the activities they had been involved with can also be traced using technology (Dunn 14). A new online role playing game has been created that allows the players to upload real pictures of them and also hold dialogue. The game has become very popular among online players, but this has also brought new challenges with it, as the game can be used to promote human trafficking. This is because it easy to identify a person through the picture they have put and request for a personal meeting with another player through dialogue. As the designer of the game, there are moral obligations that one has to uphold, but that does not mean that they do not come at a price. The designer has to make a choice that he or she understands can lead to the collapse of his online game while combating the challenge of human trafficking possibility or choose to ignore the problem at hand. One would argue that the game by itself does not influence the decisions one makes it only promotes their thoughts and behavioural patterns, and therefore, the designer should not respond to the concerns that come up. For a criminal who decided to use the game to target his victims is merely using the game for the wrong reasons as that is not what it was meant for, and it would be highly unfair to ask the designer of t

Analysis Essay Example | Topics and Well Written Essays - 250 words - 16

Analysis - Essay Example The writer also deduces that the â€Å"sublimity and intrinsic dignity that lies in the command in duty† is evident, is not subjective, and does not go against the law. The reasons provided support the thesis by providing the two sides of binary deduction in the thesis. Since the thesis averred that duty should not be derived from human characteristics but from practical unconditional necessity; the passage explains the consequences when duty is derived from the two perspectives. When it is derived from human characteristics, it results to subjective principle, but when derived from unconditional necessity of action, it bears an objective principle. This way, the reader is able to compare and contrast the outcome of the two approaches. The passages plays a significant role because the reader is able to discern that sometimes we act because of being compelled by human characteristics; however, we should act with a sense of good faith, and that is the true sense of

Importance Of Internal And External Communication Strategies Essay

Importance Of Internal And External Communication Strategies - Essay Example There are certain factors that help in determining the effectiveness of communication strategy a corporation implements. These factors include a number of employees the message is intended for, their relationship, nature of the message and channel and the effectiveness of the feedback system. An essential aspect of internal communication is it should be concentrated as well as coordinated so that the message is well communicated and different managers and employees can be reached through this. Moreover, it must be consequent in nature and continuously transmitted. Internal communication can be further classified as work, control, change, culture and news communication. This classification segregates the nature of information and makes it more defined. Together all these kind of communication creates an integrated system of internal communication (Kalla, 2005). The strategies that have been employed by multinationals to improve internal communication are electronic communication throu gh e-mail, integrated chat platform, video-conferencing and social networks. Employees of a multinational company are encouraged to be part of different network groups within the organization (Luo and Shenkar, 2006). This helps them in understanding culture aspects of their global counterparts, gaining insight of their professional achievements and learning through knowledge sharing and transfer (Phene and Almeida, 2008). The multinationals are also active in social media circles, where employees are encouraged to participate.

Federal Election Commission 558 U.S Assignment Example | Topics and Well Written Essays - 500 words

Federal Election Commission 558 U.S - Assignment Example As the report declares  apprehensive about the â€Å"possible civil and criminal penalties for violating  §441b,† it filed a â€Å"declaratory and injunctive relief,† claiming that  §441b is unconstitutional when applied to the said documentary and that the disclaimer, disclosure, and reporting requirements under BCRA, BCRA  §Ã‚ §201 and 311, were unconstitutional when â€Å"applied to Hillary and the ads†. With this, â€Å"the District Court denied Citizens United a preliminary injunction and granted appellee Federal Election Commission (FEC) summary judgment†.From this   paper it is clear that  the Court reversed in part, affirmed in part, and remanded. They considered the â€Å"continuing effect of the speech suppression† in the Austin case since the issue involves the application of  §441b to the Hillary. The Court overruled the Austin case stating that there is â€Å"no basis for allowing the Government to limit corporate indepen dent expenditures†. It ruled that such restrictions on expenditures under  §441b â€Å"are invalid and cannot be applied to Hillary†. Given this, the Court also overruled the part which â€Å"upheld BCRA  §203’s extension of  §441b’s restrictions on independent corporate expenditures†. However, â€Å"BCRA  §Ã‚ §201 and 311 are valid insofar as applied to the ads for Hillary and to the movie itself†.  The Court considered  §441b’s facial validity claiming that â€Å"any other course would prolong the substantial, nationwide chilling effect caused by  §441b’s corporate expenditure ban†.

Business Research and Analysis- design an experiment on starbucks Paper

Business and Analysis- design an experiment on starbucks - Research Paper Example Company managers with this orientation strive to make their products the best and for continuous improvement. An experiment, specifically a blind two-group experimental taste test, will be conducted to find out whose latte has superior taste. The research questions are: 1. Does a Starbucks latte taste better than a McDonald latte? 2. Does a Starbucks latte taste better than a Dunkin Donuts latte? The taste test is an example of a sensory test, in which the instruments for investigation are the senses themselves (Liedtke, et al., 2005). Many such tests have been conducted. Some examples are: 1. Gunnarsdottir and Thorsdittor’s (2010) study on the effect of food packaging on the perceived taste of healthy food by children; 2. Urdan and Urdan’s (2001) experimental analysis on the effect of brand name and taste on consumers’ buying intentions; 3. Studies that assess the taste and off-taste in drinking water by using quantitative taste and odor measurements compared wi th threshold numbers to evaluate compliance with government regulations (DWI, 2002); and 4. A comparison of taste test ratings after repeated consumption of different strengths of iced tea (Vickers and Holton, 1998). The experiment will involve a blind two-group experimental design, like those used for clinical drug trials. ... Ha: A Starbucks latte tastes better than a Dunkin Donuts latte. Method Participants Though Starbucks has long insisted that it does not market to children, the young population is often seen drinking their beverages (Linn, 2007). Stratified, quota sampling will be employed. There will be six sets of sixty participants each, totaling 360 participants, stratified by age (11-19; 20-29; 30-39; 40-49; 50-59; 60 and up), where each set will have 30 males and 30 females, to control for age and sex, factors for which taste norms have not been determined (Moretz, 2006). Participants will be randomly assigned to a control group or intervention group by computer-generated randomization schedule, where each group will equal thirty participants, with equal numbers of male and female participants and stratified by age. This process is blinded, so that participants will not know their group assignment. Participants will be recruited through advertisements in the newspapers. They will be informed of their full rights and compensation and will be asked to sign consent forms. Research ethics shall be strictly followed. Interventions The control group will be given three cups (fifteen ounces each) of Starbucks latte. The intervention group will be given one cup (fifteen ounces) each of a Starbucks, McDonalds, and Dunkin Donuts latte. Administration of cups will be rotated. Both groups will be asked to rate each cup on a five-point scale (very good, good, neutral, bad, very bad). Both descriptive and inferential statistics will be employed upon analysis of results. Variables and Controls The dependent variable is the perception/measurement of taste of the lattes. The independent variable is the brand of latte, i.e. Starbucks, McDonald’s, and Dunkin

United States Declaration of Independence Essay Example for Free

United States Declaration of Independence Essay The enlightenment era arose in the modern cultural ideology of the 18th century, as ideas among philosophers had a widespread effect among the society. The age of enlightenment, in western society, projected the rejection of traditional Christianity, western philosophy, intellectual advances, scientific, and cultural life, government legitimacy and authority. Upon the enlightenment period multiple philosophers emerged, the individuals arose to leading figures using reason to understand all aspects of human life. The motivations for the enlightenment came primarily from the Englishmen, John Locke. John Locke was a philosophical influence in both political theory and theoretical philosophy, which was embraced among the era of 1789-1914 and the concept of equal rights among men. John Locke’s writings influenced the works of multiple diplomats concerning liberty and the social contract between society and the government. Locke’s ideology of man and power was the base for the concept of separation of powers. As one of the enlightenment thinkers, John Locke wrote the Two Treatises of Government influencing the framework of his ideal vision of the nature of man and his freedom, stating that all men exist in â€Å"a state of perfect freedom† as â€Å"every man being, has been showed, naturally free. † (Primary Sources, 156) His theories involved the money value within trading systems, education ideals, the blank mind shaped by surroundings, and the framework for the American Revolution. Locke’s ideas were taken and embraced as his ideas â€Å"seemed to offer the hope of a brave new world† built on reason. † (Spielvogel 516) The enlightenment was an era of intellectual and social growth as people began to challenge and view the world changed. During the era, society began to believe all men are free people, a concept enforced by John Locke’s ideologies. John Locke believed every person was born with tabula rasa, blank mind, arguing in Essay on Human Understanding that men and women, were products of their environment, and implied that humans were molded by their surroundings. With the theory of the blank mind, John Locke presented with reason and logic that men and women could improve themselves by improving the surroundings. As John Locke rejected â€Å"authority and theory†¦ [by] showing knowledge derives from sensory perception and experience†¦Ã¢â‚¬  he impacted western philosophy and the understanding of knowledge. (Primary sources 212) Locke’s idea implied the restructure of society as by changing the environment, men would be properly influenced, and a new society created. The idea of a perfect new society was seen among the creation of the utopian community by Robert Owen. The idea of men being able to be shaped by the community is seen among Owen’s work to set up the model community. Through his works in A New View in Society Owen shows how the communitarian project achieved â€Å"moral improvement with commercial success† with the help of an orderly system to manufacture, and â€Å"inculcating the moral virtues of cleanliness, order thrift, and sobriety. † (Primary Sources 320) Owen was successful in creating the modeled community, with the idea of tabula rasa, and creating a cooperative self-contained community. The enlightenment employed the right of equality among all men. John Locke advocated natural rights of man, mainly life, liberty, and property. His avocation for men equality included the validity of governments powers should rely on consent from the citizens. The pursuit of representation from government led to the democracy in the America’s as they created the separation of powers. Locke supported the overthrow of absolute power, as he rejects the concept of royal superiority in his Second Treatise of Government. His belief in mutual consent from the people to the government is the basis of the social contract, showing how man’s â€Å"perfect freedom†¦and liberty [should give man] is able to instruct him in that law he is to govern himself. † (Primary Sources, 151) Locke’s political ideology included overthrowing government if citizens felt their rights were taken away, citizens had the duty to revolt against the tyrant. This ideology is embraced during the French Revolution as â€Å"before the revolution, French society was grounded in the inequality of rights,† among the citizens. (Spielvogel578) The French were divided into classes, having no voice among the three estates, leading to the national assembly. The national assembly, influenced by John Locke’s ideology of rejecting royal reign superiority, created the Declaration of the Rights of Man and of the Citizen. Locke’s argument of revolution against tyranny was accepted to bring reasonable rule to the nation and citizens. The same liberalist view of overthrowing of ruler is seen during the napoleon rule. Benjamin Constant published The Principles of Politics advocating for the regulations of the generals will of the individuals liberty, â€Å"distinguishing between sovereignty, authority, and individual freedom,† right before Napoleon’s final defeat. (Primary Sources 342) Many of John Locke’s ideas were input into the Declaration of Independence, as his primary words â€Å"life, liberty† and instead of property, the pursuit of happiness, are the basis of the American Constitution and Declaration of Independence. Locke’s arguments concerning liberty influenced the works of James Madison, Alexander Hamilton, Thomas Jefferson, as his Second Treatise is imitated in the Declaration of Independence. When the founding fathers adopted the resolution for the nation’s independence, with the restating of john Locke’s theory of revolution, they opened the door to the war of American Independence. As well as Locke’s separation of powers was framework for the American democracy created after the independence from Britain and the belief of revolting is an obligation in the certain circumstances. With the fear of a concentrated power the founding fathers of America secured the rights life, liberty, and pursuit of happiness, to which the government institutes the rights and derive their powers with the consent of the men. When creating the independence the people laid the foundation of separation of powers in which each branch is checked and has no overruling power among the rest of the government. With the influence of John Locke’s political ideologies, the American colonies, after the American Revolution, â€Å"proved to many Europeans that the liberal political ideas of the Enlightenment were not a vapid utterances of intellectuals. The rights of man, ideas of liberty, and equality, popular sovereignty, separation of powers, and freedom of religion†¦were not only utopian ideals. † (Spielvogel 578) The Americans had taken John Locke’s theories and made the concept of liberty reality. Consequently the American Revolution had an impact on the French revolution with the returning soldiers the influence of the American Declaration of Independence was seen among the Declaration of the Rights of Man and of the Citizen. The French revolution was more violent than the American, but it set the political movement for the modern political world. John Locke political theories were focused on the protection of the human rights, responsibility of the government, clarifying the concept between state and man. Locke insisted on the limits towards political authorities, and believed government should be selected, not born into, by the will of the majority. This set the fundamental declaration of the French revolution. John Locke an advocate for religious tolerance, wrote the Letters Concerning Toleration, conveying reasoning for religious tolerance after the European wars of religion. Within the Letters Concerning Toleration, Locke debates for the people to understand the relationship within religion and government, and how people should know the separation of the two. Separation of Church and State was created by Thomas Jefferson, who was greatly influenced by Locke’s writings, as Locke feared that without distinction between the two, the personal beliefs will mislead the commonwealth. His advocacy for religious also influenced the freedom of religion among the Americans in the Bill of Rights, as man has the right to practice or to not practice any religion. Known for his political theories, notions on natural rights and separation of powers, John Locke also held beliefs regarding the education. Originally a letter to a friend regarding his son’s education, Some Thoughts Concerning Education, Locke suggested the best way to educate the child. His theory for education was based on the argument of human mind at birth is a tabula rasa therefore a child was able to be molded with virtues. â€Å"He attentively considers the state of a child†¦ [are] stored with plenty of ideas, that are to be the matter of his future knowledge. † (Primary Sources 214) Locke’s ideas on education involved learning from experience, and influenced the concern of public education during the 1789-1914 era. His theories and ideas on education would motivate the public school system in Britain. John Locke’s emphasis on education was seen in Robert Owen’s utopian â€Å"model community. † In Owen’s New View of Society he set his influence by Locke’s education, by stating that education was not only good for business in his utopian society, but for the nation as a whole. The influence of how the importance of education was enforced by Locke’s ideologies of the ability to shape the minds of the children to better the nation. John Locke publicized a theory of money and property in his Two Treatises on Government. Locke’s theory believes the natural right of estate. His belief in money describes that money fulfills the need for a constant measure of value and worth in a trading system. Locke argued for an economic system which could exist in the states and protection of property by the society. His ideal on a trading system influenced the merchandized 18th century industry. The eighteenth century was formed based on the growth of commercial led by John Locke’s economic system theory on trade. The â€Å"growth of commercial capitalism led to integrated markets, joint-stock trading companies, banking and stock exchange facilities,† which shaped the nations view on money. (Spielvogel 564) As the eighteenth century flourished, Locke stated gold, silver, gems never rot, and therefore with the consent of mankind they become of monetary value and are open for trading value. With his theories of trading and money, John Locke can be seen as the creator of the bourgeois capitalism. The trading system was influenced by John Locke and embraced in the European trading which gave growth of cities, prosperity within the cities, the industrialization, and the manufacturing business. The Enlightenment was period of time with great thinkers bringing radical changes to society and the world. John Locke, known for Father of Liberalism and the enlightenment thinker, had a great impact among philosophers. John Locke was advocating the freedom of the individual, systems of government, nonviolent modification of political, social, or economic institutions, and governmental guarantees of individual rights and civil liberties. Locke’s enlightenment ideas were employed during the long 19th century. â€Å"Locke’s treatises inspired the political theories of the Enlightenment. † (Primary sources 148) His philosophical ideals influenced many other philosophers, utopian societies, the upheavals against government, the protection of rights, the education system in Britain, and the basis for modern government.

Social Consequences of New Media

Social Consequences of New Media Identify the most consequential features of ‘new media’ and assess how and why sociological theory and concepts deal with these. Abstract This essay establishes the background of new media technologies within the context of their historical development. The argument is then addressed towards the largest social consequences tial outcomes of new technologies as through analysis of the augmentation and facilitation of social communities and online interest groupsthe key consequential developments of new media, culminating in the premise that online community augmentation is the most crucial in order to provide social structures for the existence and promotion of other new media consequences. This argument is then placed into a framework of related theoretical endeavour and elucidates salient arguments in order to establish the premise within contemporary academia. The essay closes with a summation of the discussion along with concluding comments. The term ‘new media’ has gained a great deal of currency over the past two decades. It is also worthy of note that the term has gained status as a collective, singular noun form as if it was in reference to a single, coherent entity. This practice has become increasingly common, not only in marketing circles and journalistic reportage but also in the world of academia. Whilst the term in itself is incredibly vague, the utterance of such increasingly implies solidarity of existence as a totally formed and fully achieved social and material practice. Whilst there is little truth in this premise, this nature of conduct continues, and in doing so undermines development of coherent debate. Throughout this paper, the term ‘new media’ will be applied to the technological practice, development and subsequent social construction of those technologies which have been borne of internet and digitally associated technologies. In addition to this, it must be pointed out that it would at best be truculent, and at worst benighted, to talk of the consequences of new media in terms of cause and effect; this does not do the subject justice nor does it recognise the transience of the situation. It is for these reasons that throughout the course of this critique the consequences of new media technologies will be catalogued in a historically linear form in order to demonstrate the manner in which such technologies lead to further technological developments, each built upon the innovation of the previous. This essay will address the inception of those technologies which have now come to be known as new media and establish them within a historical framework with particular e mphasis placed on the development of the World Wide Web. Scholarly endeavour on these matters is subsequently placed into context of existing examples of new media development, along with their societal consequences. These arguments are then consolidated with broader, underpinning theories which argue for the case of community augmentation as the primary consequence of new media technologies. The essay then closes with a summary of key points raised with according conclusions. Current developments in new media technologies can be traced back to the inception of internet technologies and the consequential developments which ensued. When John Licklider joined ARPA, Leonard Klienrock was already developing ideas for ‘packet sending’. This was a method of sending information in broken up pieces, or ‘packets’. The information would be reassembled at the other end. Because the files were broken up before sending, they would be more difficult to eavesdrop, therefore of great appeal to ARPA. In 1965 an experiment saw computers in Berkley and MIT linked over a low-speed dial-up telephone line, forming the first ever Wide Area Network (Sadar, 2000). ARPA scientists continued the development of networking protocols and in 1972 TCP/IP was born. This would allow different networks to communicate with each other. Now it was simply a matter of time and growth, as at this stage computers consisted of large mainframes that were not available to the majority of people. In 1982, whilst ARPANET was still the backbone of the system, they adopted TCP/IP. This is considered as the birth of the internet; an international network of computers all using the standard. Expansion of the system was also occurring due to advances in computer technology and in 1984 the number of online hosts was over 1000. Governments started using and promoting the system for educational purposes and by 1987 there were 10.000 hosts (over the following two years this number had swelled to 100,000) (Baym, 1998). The year 1991 saw the launch of the World Wide Web (WWW) which consisted of a network of searchable and retrievable sites that employ the use of Hypertext Transfer Protocol (HTTP). This protocol automatically searched for the site and retrieved it for automatic viewing. Tim Berners-Lee and other scientists had been developing ideas for making data easily retrievable since 1989 and several browser/editor programs were made shortly after. This formed the basis of what would become new media technology as it is now known (Baym, 1998).An important consequence of the proliferation of new media is the digital divide. In economic terms, the digital divide emphasises the gap between those with privilege and those without. Those without suffer a more limited access to the means of information distribution that new media has come to be synonymous with; internet access, email, smartphones, etc. The consequences of this are broad reaching since they can affect people not just on their individual access to digital information services but also by geographical location or by their access to social entities such as businesses, educational services and public services. This gap also exists between nation states and is known on an international scale as the global digital divide (Halford Savage, 2010). The historically recent rise in new media has also prompted an interest in the academic study of mobilities; an area of the social sciences which was largely disregarded until the phenomenon. The turn in attitude is due largely, if not wholly, to the ubiquity of locative media and mobile communications in increasingly novel forms (Urry, 2000). These new technologies are augmenting and supplementing the manner in which members of society communicate with one another, and indeed their locations, on the move. Such ICTs (Information and Communications Technologies) are increasing in ubiquity, as increasing numbers of people begin to carry smart technologies with them, and rising numbers of architectural structures and public borders are becoming embedded with responsive entities which can relay pertinent information. Transport structures, public service buildings, architecture of interest, etc. are becoming increasingly embedded with satellite connectivity, GPS, responsive software, sens ors and other interactive data transfer forms (Urry, 2004). It is uncontroversial to argue that the most important and far-reaching consequence of new media is the increased ability for social and community forming; the world has witnessed a massive rise in online groups and communities. For many people it is now possible to be part of multiple online groups simultaneously. Much of the general debate around the value of the virtual communitiesdebate which surrounds new media also highlights the increase in digital representation and through subcultures. From the early days of online chatrooms and social portals which existed entirely in textual form, the development into widespread social media has brought with it a sharp rise in both the globalisation of culture and digital representation of the self through online platforms. Debate on such representation has become which have developed from new media technologies has become polarised in academic debateia. On the one hand is the groupA strong argument in scholarly endeavour which argues maintains that the internet has created a new platform for with which to resurrect traditional notions of community (perceived as fading in ‘real life’) which could be perceived as diminishing in modern culture; this and is a positive step towards achieving a new global solidarity, particularly with the co ncurrent development of cultural globalisation. The opposition to this school of thought maintain that cyberspace detracts attention from the issues faced in ‘real life’ community and is therefore erodes it. This point of view is eloquently allegorised in the opening page of Jean Baudrillard’s Simulations (1983). Baudrillard paraphrases the Jorge Luis Borges tale of cartographers who create a map of the empire to such detail that it perfectly covers the land it represents. Whilst the map is celebrated the land underneath it declines into wasteland. This is only brought to the attention of the people when the map itself erodes, revealing an uninhabitable â€Å"desert of the real† (Baudrillard, 1983). It is uncontroversial to argue that the most important and far-reaching social consequence of new media is the increased ability for the formation of communities which were previously unavailable. These community groups are salient and consistent throughout the development of new media technology and additionally it is now possible for many to be part of multiple societal groups simultaneously. Such communities are so influential because they underpin and promulgate the existence of other key elements of new media technology development, such as social change, cultural globalisation, digital identity, the mobilisation of smart technologies, etc. Theorists Wellman and Gulia argue that the current debate on virtual communities is problematic for several reasons. They state that the polarisation of opinion makes the debate Manichean, and also that a sense of the history of community is absent. In addition to this, they contend that the debate on virtual communities is largely unscholarly and is parochial in the sense that it forces a divide between ‘real life’ communities and those online. They go on to say that the notion of a traditional community is nostalgic and saturated with myth (Wellman Gulia, 1999). Whilst Wellman Gulia make some fair points, certainly the polarisation of the online debate (and also the separation of online life and real-life in theory) the two extremes of opinion have produced a substantial amount of research on the matter. When defining community it is useful to look at the work of German sociologist Ferdinand Tonnies, who developed the terms Gemeinschaft and Gesellschaft. Gemeinschaft (translated roughly as ‘community’) is described by Tonnies as traditional community, characterised by bonding through kinship, friendship, shared religious beliefs and community loyalty. Tonnies termed modern, capitalist societies as Gesellschaft (community, or association), where social interactions and relationships are much less personal, more calculated and contractual, where the society experiences increased isolation of individuals living within it (Tonnies, 1988). There is also important work regarding broader communities, in particular Benedict Anderson’s theories concerning nations, or as he terms â€Å"imagined communities† (Anderson, 1983). Since the members of a nation cannot possibly interact with (or have knowledge of) everyone within that nation, certain symbolic resources and rituals (or as Anderson refers â€Å"invented traditions†) are utilised to coalesce people and create a sense of shared identity (flags, national anthems, etc.). Anderson maintains that these types of communities depend on their members believing in them, and are maintained through the shared practice of cultural customs and devices (Anderson, 1983). These Current definitions of digital community, whilst useful, suffer the same drawbacks as most in that they can be taken to extremes within their own boundaries, and do little to draw the line as to how far to go. A useful analogy is presented by David Bell (2001), who asks â€Å"I drive a car. To what extent could I argue that I belong to a ‘community of car drivers’?†. Bell goes on to explain that his car driving community satisfies all aspects of popular community definitions. Identity as a ‘car driver’ is institutionalised by a driving licence, which not only provides certain privileges but also acts as a proof of identity in a broader sense, and this is a commonality with other car drivers. Bell continues to describe a ‘set of knowledges’ which all car drivers possess (of driving, of the road, etc.), some of them formalised and some tacit. Whilst the Highway Code formalises one strand of such knowledge there also exists a tacit und erstanding in the form of driving etiquette and the like. The final point Bell makes is that of facilitation. The car also facilitates his membership of off-road communities (Bell, 2001). Whether or not Bell’s example does satisfy a definition of community is still debatable, but it does raise some important points when trying to define community, especially when comparing or contrasting to those which exist online. The same terms of Bell’s analogy could just as simply be applied to MySpace or EBay, both of which have had a far-reaching and consequential impact on capitalist societies; MySpace in many ways became the prototype of digital self-representation, with its ability for photographic and thematic customisation, coupled with a platform for creative endeavour or the broadcast of opinions. This paved the way for a broad range of online social media platforms which developed or augmented the original MySpace model. Conversely, EBay provided a platform for commerce which laid down an archetype for online trading. The eBay model for the first time allowed people to generate income through private auctioning on a global scale, in many cases providing en tire businesses to operate solely within the confines of the site. Regardless of their achieved scope and proliferation of use, but would the question remainsthat mean regarding whether or not that these ‘created communities’ satisfy a Gemeinschaft definition of community, and even if they did this would not necessarily make them communities in the nostalgic sense. , would that make them a community in the nostalgic sense? Bell explores this matter by offering a distinction between the terms (sometimes used synonymously by critical theorists) ‘community’ and ‘sub-culture’: Clearly there’s a slippage between the two words, both taken to mean the same thing – Baym’s own work has used both to describe the same group of online soap fans, for example. But I think that the two words have very different connotations, so I started to wonder where the boundary between terms like these lies. (Bell, 2001:101) In this statement Bell makes a valid point. In the labelling of factions and groups as ‘communities’ more often than not the term either becomes encapsulate, including a whole host of assemblies which are perhaps better described in another category, or becomes exclusive to the point of rejection of all those groups which fail to satisfy the nostalgic and seemingly outdated notion of traditional community. With these comments in mind it seemsIt is important to establish a boundary by which to sector those groups which, although they may satisfy certain aspects of community ‘new technology’ consequences, are not engaged in sufficient humanistic interaction to be defined as such. This does not present an immediate problem as there are many online groups which fit this description and do not label themselves as communities, but remain consequential of new media. However, the emphasis on human interaction seems to be the key to which distinctions can be drawn between online organisations and actual communities. One notorious commentator on the subject, Howard Rheingold, states just that: Virtual communities are social aggregations that emerge from the net when enough people carry on†¦public discussions long enough, with sufficient human feeling, to form webs of personal relationships in cyberspace. (Rheingold, 1993:12) Since traditional community is no longer possible in its pure form, due predominantly to capitalism and globalisation, people have searched out the areas of their community which they now lack. Humans , being social animals (and at best, survivalists) have utilised the internetnew media in tandem with the development of technology to maintain and keep control of the things which they inherently hold dear. In this case, the elements of community which contemporary society have consequentially eroded with new media are also supported by new media. These consequences are now are now to be found online in forums, groups and interactive spaces. New media technology The internet does not house communities, but symbiotically supports those areas of community which no longer exist outside of the webof such developments, and arguably, due to such developments. Online platforms such as MySpace or Facebook provide many services, but do not create a social network for its users. Rather, new medi a they allow users to supplement their existing social networks with online support. Furthermore online Interactions can take place which will allow families who are miles apart to keep in touch in ways that have previously been impossible, thus they are solving previous difficulties pertaining to traditional community, predominantly that of distance and (the resulting factor of) time, and strengthening these communities in ways that previously could not be achieved. It is now possible for community to become reinforced by new media technologies in ways that were previously impossible, thus strengthening the weak elements that existed in the Gemeinschaft-style structure. Utilising technology, traditional communities are able to function over distance in real-time, in cybernetic unison. References Anderson, B. (1983) Imagined Communities: reflections on the origin and spread of nationalism, London: Verso. Baudrillard, J. (1983) Simulations, USA: Semiotext[e] Baym, N. (1998) ‘The emergence of an on-line community’, Cited in S.Jones (ed.) Cybersociety 2.0: revisiting computer-mediated communication and community, London: Sage. Bell, D. (2001) An Introduction to Cybercultures, London: Routledge. Halford, S. Savage, M. (2010) ‘Reconceptualizing Digital Social Inequality’, Information, Communication and Society 13 (7): 937-55. [online] Available from: www.cresc.ac.uk/sites/default/files/Paper No 86_0.pdf (Accessed 18/11/20130). Rheingold, H. (1993). The Virtual Community: Homesteading on the Electronic Frontier. New York: Addison-Wesley. Sardar, Z. (2000) ‘Alt.civilizations.faq: cyberspace as the darker side of the West’, Cited in Bell, D. and Kennedy, B. M. (eds.) The Cybercultures Reader, London: Routledge. Tonnies, F. (1988) Community and Society (Gemeinschaft und Gesellschaft). (C. P. Loomis, Trans.). New Brunswick, NJ: Transaction. (Original work published in 1887). John Urry (2000) Sociology Beyond Societies London: Routledge. John Urry (2004) ‘Mobile Sociology’, ch.13 in Frank Webster (ed.), The Information Society Reader London: Routledge. Wellman, B. Gulia, M. (1999) ‘Virtual communities as communities: net surfers don’t ride alone’, Cited in Smith, M. Lollock, P. (eds.) Communities in Cyberspace, London: Routledge. Bibliography Benton, T. Craib, I. (2001) Philosophy of Social Science: The Philosophical Foundations of Social Thought. Basingstoke: Palgrave. Benton, T. Craib, I. (2001) Philosophy of Social Science: The Philosophical Foundations of Social Thought, Basingstoke: Palgrave. Castells, M. (2001) The Internet Galaxy. Oxford: Oxford University Press. Craib, I. (1997) Classical Social Theory: An Introduction to the Thought of Marx, Weber, Durkheim, Simmel. Oxford: Oxford University Press. Flew, F. (2002) New Media. Melbourne: Oxford University Press. Lievrouw, L.A. (2006) ‘New Media Design Development: Diffusion of Innovations Vs. Social Shaping of Technology’, in Lievrouw, L. Livingstone, S. Handbook of New Media: Social Shaping and Social Consequences, London: Sage Lister, M., Dovey, J., Giddings, S., Grant, I., Kieron, K. (2003) New Media: A Critical Introduction. London: Routledge. May, C. (2002) The Information Society: a sceptical view. Cambridge: Polity. Sayer, D. (1991) Capitalism Modernity: An Excursus on Marx Weber. London: Routledge. Webster, F. (2006) Theories of the Information Society, 3rd edition. Routledge. Woolgar, S. (ed.) (2002) Virtual Society?Oxford: Oxford University Press.References Anderson, B. (1983) Imagined Communities: reflections on the origin and spread of nationalism, London: Verso. Baudrillard, J. (1983) Simulations, USA: Semiotext[e] Baym, N. (1998) ‘The emergence of an on-line community’, Cited in S.Jones (ed.) Cybersociety 2.0: revisiting computer-mediated communication and community, London: Sage. Bell, D. (2001) An Introduction to Cybercultures, London: Routledge. Rheingold, H. (1993). The Virtual Community: Homesteading on the Electronic Frontier. New York: Addison-Wesley. Sardar, Z. (2000) ‘Alt.civilizations.faq: cyberspace as the darker side of the West’, Cited in Bell, D. and Kennedy, B. M. (eds.) The Cybercultures Reader, London: Routledge. Tonnies, F. (1988) Community and Society (Gemeinschaft und Gesellschaft). (C. P. Loomis, Trans.). New Brunswick, NJ: Transaction. (Original work published in 1887). Wellman, B. Gulia, M. (1999) ‘Virtual communities as communities: net surfers don’t ride alone’, Cited in Smith, M. Lollock, P. (eds.) Communities in Cyberspace, London: Routledge. Bibliography Castells, M. (2001) The Internet Galaxy. Oxford: Oxford University Press. Webster, F. (2006) Theories of the Information Society, 3rd edition. Routledge. Lievrouw, L.A. (2006) ‘New Media Design Development: Diffusion of Innovations Vs. Social Shaping of Technology’, in Lievrouw, L. Livingstone, S. Handbook of New Media: Social Shaping and Social Consequences, London: Sage May, C. (2002) The Information Society: a sceptical view. Cambridge: Polity. Flew, F. (2002) New Media. Melbourne: Oxford University Press. Benton, T. Craib, I. (2001) Philosophy of Social Science: The Philosophical Foundations of Social Thought. Basingstoke: Palgrave. Craib, I. (1997) Classical Social Theory: An Introduction to the Thought of Marx, Weber, Durkheim, Simmel. Oxford: Oxford University Press. Sayer, D. (1991) Capitalism Modernity: An Excursus on Marx Weber. London: Routledge. Benton, T. Craib, I. (2001) Philosophy of Social Science: The Philosophical Foundations of Social Thought, Basingstoke: Palgrave.

Calculations Without Brake Booster Engineering Essay

Calculations Without Brake Booster Engineering Essay The purpose of this written assessment is to show that we understand how the braking system works in an automotive vehicle. We should be able to show a range of specialized technical skills which involve a wide choice of standard and non standard procedures. I will also show you a broad knowledge base with substantial depth in some areas of the braking system. Here in this assignment I will also cover the determination of appropriate methods and procedures in response to a range of concrete problems with some theoretical elements and apply it in self directed and sometimes directive activity, within broad general guidelines. By the end of this assessment I will have a wide understanding of how the braking design and braking system work within the automotive vehicle. A brake is a device for slowing or stopping the motion of a vehicle or a machine, and to make sure that it stops moving. The kinetic energy lost by the moving part is usually translated to heat by friction. Alternatively, in regenerative braking, the energy is recovered and stored in a flywheel, capacitor or other device for later use. Brakes of some description are fitted to most wheeled vehicles, including automotive vehicles of all kinds, trains, motor bikes, and normal pedal bikes. The kinetic possessed by a vehicle at any one time into heat energy are by means of friction. The equations for kinetic energy, that is the energy of motion may be given by: The disc brake is a device for slowing or stopping the rotation of a wheel on a vehicle. A braking disc or commonly known as a rotor, is usually made up of steel and other metallic compounds, is connected to the wheel or the axle. To stop the wheel, the braking pads which are normally mounted in a device called a brake caliper, which is then squeezed mechanically or hydraulically against the disc on both sides. Friction causes the disc and attached wheel to slow down and stop according to the driver. A drum brake is a brake in which the friction is caused by a set of shoes or pads that press against the inner surface of a rotating drum. The drum is connected to a rotating wheel. The modern automotive vehicle drum brake was invented in 1902 by Louis Renault. In the first drum brakes, the shoes were mechanically operated with levers and rods or cables. From the mid 1930s the shoes were operated with oil pressure in a small wheel cylinder and pistons, though some vehicles continued with purely-mechanical systems for decades. Some designs have two wheel cylinders. Experiments with disc-style brakes began in England in the 1980s the first ever automobile disc brakes were patented by Frederick William Lanchester in his factory in 1902, though it took another half century for his innovation to be widely adopted. The first designs resembling modern disc brakes began to appear in Britain in the late 1940s and early 1950s. They offered much greater stopping performance than comparable drum brakes, including much greater resistance to brake fade this is caused by the overheating of brake components, and were unaffected by immersion which is drum brakes were ineffective for some time after a water crossing, an important factor in off-road vehicles. Disc brakes are also more reliable than drum brakes due to the simplicity of their mechanics, the low number of parts compared to the drum brake, and ease of adjustment. Disc brakes were most popular on sports car when they were first introduced, since these vehicles are more demanding about brake performance. Many early implementations located the brake disc inboard, near the differential, but most discs today are located inside the wheels. An inboard location reduces the un-sprung weight and eliminates a source of heat transfer to the tires, important in formula one racing. Discs have now become standard in most passenger vehicles, though some retain the use of drum brakes on the rear wheels to keep costs and weight down as well as to simplify the provisions for a parking brake or emergency brake. As the front brakes perform most of the braking effort, this can be a reasonable compromise. Mechanism A single piston, floating caliper system. Pressurized brake fluid travels along the brake line to the caliper. The pressurized fluid pushes the piston (green) and inner brake pad against the disc which is normally blue. Pressure against the disc pushes the caliper away from the piston, pulling the outer brake pad against the disc. As the brake pads clamp together, friction slows the rotation of the disc and wheel. Brake Pads The world of Automotive Brakes can be quite overwhelming. The first task in choosing Automobile Brakes is making sure that you have the Automotive Brakes and parts that are application specific to your vehicle whether it be a car, truck, van or whether the Automotive Brakes are to be installed on a two year old sedan or a rare classic. There is more to Automotive Brakes than parts that fit. Automotive Brakes also have to be right for the vehicles actual use. For example, Automotive Brakes required for off road or stop and go city delivery driving can be quite different than Automotive Brakes that are suited for ordinary family driving, even though all these brakes fit the job. Its a matter of finding the right Automotive Brakes for your application. Brake Pads Brake Booster Unless youre a professional athlete with tree trunks for legs, be grateful that your car has a brake booster nestled between the brake master cylinder and firewall on your car. Your brake booster doesnt make any noise, and it doesnt use any electricity or gasoline, but it ensures that you can stop your car with only a light touch of the brake pedal. Things werent always like that, Before the invention of the vacuum brake booster, cars still stopped. Its just that you had to really stomp on the brake pedal. The modern brake booster is an good device that operates using something that your engine generates whenever its running, Vacuum. The brake booster takes engine vacuum via a rubber hose that runs from the intake manifold, and the brake booster uses that vacuum to amplify the pressure you put on the pedal. A light application of the brakes is translated by the brake booster into significantly more pressure on the brake master cylinder, ensuring that your car stops quickly. So what happens to the brake booster if your car stalls, resulting in a loss of engine vacuum? Early designers realized that gas engines were hardly foolproof, so they designed a little check valve into the brake booster circuit. The brake booster stores enough vacuum to provide full boost for two or three pedal applications even after the engine dies. The check valve on the brake booster is what keeps that vacuum from leaking out. And speaking of leaks, thats the reason most brake booster units have to be replaced. As your brake booster ages, the rubber seals and diaphragms that hold the vacuum tend to wear out and crack. Brake Booster Calculations without brake booster for 1 pot caliper: Data: Force applied: 80N Length of brake pedal: 340mm Pedal movement: 46mm Diameter of master cylinder: 26mm Piston spring pretension: 15N Piston spring rate: 8N/mm Wheel diameter: 0.30/ 250mm Caliper piston: 46mm Pedal ratio= Length of pedal Pivot of brake booster = 340mm 60mm = 5.666 Movement = Pedal movement Pedal ratio = 46mm 5.66 = 8.127 Drivers applied force = Applied force x pedal ratio = 80n x 5.66 = 452.8N Piston force = (Pretension force + Rate of spring x movement of piston) = 452.8N (15n + 8N/m x8.127) = 452.8N 80.016 = 372.784 N Pressure = Force Area of piston = 372.784 N 0.25TT D2 = 372.784 N 0.25TT (26 x 10 -3) 2 = or 0.70 Mpa Caliper force = Pressure x Area = 7021.35 Pa x 0.25 TT (46 x 10-3)2 =1270.55 Transmitted force = Caliper force x Co- efficient of friction x number of pads = 1270.55N x 0.35 x 2 = 8893.85 N Torque = Transmitted force x Effective Radius = 8893.85 N x 0.30 m = 266.79 N Brake Caliper The brake caliper, a key component of your cars brake system, operates just like a small hydraulic clamp designed to grip the brake rotor and bring your car to a halt. If youve ever seen or worked on a brake caliper, you know what were talking about. The brake caliper is a U-shaped device with a piston or pistons on one or both sides of the U. The brake pads ride on top of the brake caliper pistons, and the rotor spins in the channel of the U. When you hit the brakes, high-pressure fluid is channeled from the master cylinder down to the brake caliper where it pushes the piston or pistons inward. That brake caliper action moves the pads against the spinning brake rotor, and the friction stops your vehicle. Since the brake caliper is affixed to your vehicle frame and the rotor is spinning and hundreds of RPM, its easy to imagine the massive forces that the brake caliper has to absorb. Much of the heat energy is dissipated by the rotor and pads which is why theyre replaced the most, but the pulling and twisting forces the brake caliper has to endure require that it be extremely strong. More than anything else, though, its the hydraulic brake fluid that leads to the demise of a brake caliper. If its not changed often enough, moisture in the fluid will begin to rust out the inside of your brake caliper, resulting in leaks and sticking pistons. Eventually the brake caliper will cease to function altogether, it will effect your cars stopping ability. Calipers The brake caliper is the assembly which houses the brake pads and pistons. The pistons are usually made of aluminum or chrome plated iron There are two types of calipers: floating or fixed. A fixed caliper does not move relative to the disc. It uses one or more pairs of pistons to clamp from each side of the disc, and is more complex and expensive than a floating caliper. A floating caliper (also called a sliding caliper) moves with respect to the disc; a piston on one side of the disc pushes the inner brake pad till it makes contact with the braking surface, then pulls the caliper body with the outer brake pad so pressure is applied to both sides of the disc. Floating caliper (single piston) designs are subject to failure due to sticking. This can occur due to dirt or corrosion if the vehicle is not operated. This can cause the pad attached to the caliper to rub on the disk when the brake is released. This can reduce fuel mileage and cause excessive wear on the effected pad. Brake caliper In a vehicle the brake pedal in 360mm and the booster is connected 50mm from the pivot. The booster diaphragm is 220mm with the valve body of 52mm diameter the diaphragm return spring has a pretension force of 80N and rate of 12N/mm. The engine manifold pressure of 36Kpa and ambient pressure is 90Kpa. The master cylinder diameter is 26mm and return spring retention force is 15N and a rate of 8N/mm. the caster piston in 46mm and the co-efficient of friction between the 2 pads and the 250mm effective diameter disc are 0.30. The wheel diameter is 625 mm. fluids the tractive braking forces if the driver applied force of 80N and his fast moves 46mm. Data: Force applied: 80N Length of brake pedal: 340mm Pedal movement: 46mm Pivot of brake booster: 50mm Diaphragm diameter: 220mm Valve body diameter: 52mm Spring rate: 80N Pre-tension of diaphragm spring: 12N/m Ambient pressure: 90kpa Engine manifold pressure: 36kpa Diameter of master cylinder: 26mm Piston spring pretension: 15N Piston spring rate: 8N/mm Wheel diameter: 625mm Efficient Disc diameter: 0.30/ 250mm Caliper piston: 46mm Calculations with brake booster for 1 port caliper: Pedal ratio = Length of pedal__ Pivot of brake booster = 340mm_ 50mm = Movement = _Pedal movement Pedal ratio = _46mm_ 7.2 = 6.38 Diaphragm Pressure = Ambient pressure Manifold pressure = 90Kpa 36Kpa = 54Kpa Diaphragm Area = Total area -Area of valve body = 0.25TT (220X10-3)2 0.25TT (54X10-3) 2 = 35.72 x 10-3 Force of Diaphragm = Pressure x Area = 54Kpa x 10-3 x 35.72 x 10-3 = 1928.88 Nm Booster output force= Diaphragm force (spring pre-tension + rate of spring x movement of piston) = 1928.88 Nm (80N + 12N/m x 6.83) = 1928.88 Nm 156.56 = 1772.32 Nm Driver applied force = Applied force x pedal ratio + Booster output = 80N x 7.2+ 1772.32 Nm = 2348.32 N Piston force = Booster force (Pretension force + Rate of spring x movement of piston) = 2348.32 N (15N +8N/m x 6.38) = 2348.32 N 66.04 = 2282.28N Pressure = ____Force___ Area of piston = 2282.28N 0.25 TT D2 = 2282.28N 0.25TT (26 x 10-3)2 = 42986.52 Pa or 4.29 Mpa Caliper force = Pressure x Area = 42986.52 Pa x 0.25TT (46 X10-3)2 = 7143.94N Transmitted force = Caliper force x Co-efficient of friction x Number of pads = 7143.94N x 0.35 x 2 = 5000.758N Torque = Transmitted force x Effective radius = 5000.758N x 0.125m = 625.094Nm Tractive = Torque (Braking) Radius of wheel = 625.094Nm 0.35m = 1785.985N Difference between Tractive with without brake booster Tractive different = Tractive with brake booster Tractive without brake booster = 1785.985N 226.79N In the previous calculations it just goes to show you how useful the brake booster application is in todays modern vehicle, because if it wasnt we would have to apply a major amount of pressure to the brake pedal, the brake booster wasnt really put to its application till the early 1950s, but in this modern day and age there are more technical designs which involve a use of 2 and 4 pot calipers this design isnt just to make the brake system look better but it also increases the tractive braking force The design of the brake discs and caliper varies. Some are simply solid steel and some are made up of carbon fibers, but others are hollowed out with fins joining together the discs two contact surfaces usually included as part of a casting process. This ventilated disc design helps to dissipate the generated heat. Many motor bikes and sport car brakes instead have many small holes drilled through them for the same purpose. Additionally, the holes aid the pads in wiping water from the braking surface. Other designs include slots shallow channels machined into the disc to aid in removing used brake material from the brake pads. Slotted discs are generally not used on road cars because they quickly wear down brake pads. However this removal of material is beneficial to race cars since it keeps the pads soft and avoids verification of their surfaces. Some discs are both drilled and slotted. Pistons cylinders The most common caliper design uses a single hydraulically actuated piston within a cylinder, although high performance brakes use as many as 8. Modern cars use different hydraulic circuits to actuate the brakes on each set of wheels as a safety measure. The hydraulic design also helps multiply braking force. Failure can occur due to failure of the piston to retract this is usually a consequence of not operating the vehicle during a time that it is stored outdoors in adverse conditions. For high mileage vehicles the piston seals may leak, which must be promptly corrected. Parking brakes Most vehicles include a mechanical parking brake system also called an emergency brake which operates on the rear wheels. These systems are very effective with drum brakes, since these tend to lock. The adoption of rear-wheel disc brakes caused concern that a disc-based parking brake would not effectively hold a vehicle on an incline. Today, most cars use the disc for parking, though some still rely on separate drums. An emergency brake is a braking system that is generally only to be used in emergency situations to slow or stop a machine. The most well known emergency brakes are those in trains and automotive vehicles. Many people shorten emergency and call the devices e-brakes. Additionally, in the automotive side, they are also known as parking brakes and hand brakes. In cars, the emergency brake is a supplementary system that can be used if the vehicles primary brake system has a failure. Automobile e-brakes usually consist of a cable directly connected to the brake mechanism on one end and to some type of lever that can be actuated by the driver on the other end. DATA: Forced applied: 80N Length of brake pedal: 360mm Pedal movement: 46mm Pivot of brake booster: 50mm Diaphragm diameter: 220mm Valve body diameter: 52mm Spring rate: 80 N Pre tension of diaphragm spring: 12 N/m Ambient pressure: 90kpa Manifold pressure: 36kpa Diameter of master cylinders: 26mm Piston spring pretension: 15 N Piston spring rate: 8 N/m Wheel Diameter: 625mm Efficient disc diameter: 0.35 / 250mm Calliper piston: 46mm x 2 Calculation with brake booster for two pot callipers: Pedal ratio = Length of pedal Pivot of brake booster =360mm 50mm =7.2 Movement = Pedal movement Pedal ratio =46mm 7.2 = 6.38 Diaphragm pressure = Ambient pressure Manifold pressure = 90Kpa 36Kpa = 54 Kpa Diaphragm Area = Total area Area of valve body = 0.25TT (220 x 10 -3) 2 -0.25TT (54 x 10 -3 ) 2 = 35.72 x 10 -3 Force of diaphragm = Pressure x Area = 54 Kpa x10 -3 x 35.72 x 10 -3 = 1928.88 Nm Booster output force = Diaphragm force (spring pretension + rate of spring movement of piston) =1928.88 Nm ( 80 N + 12 N/m x 6.38) =1928.88 Nm 156.56 = 1772.32 Nm Driver s applied force = Applied force x pedal ratio + booster output = 80 N x 6.38+ 1772.32 Nm = 2348.32 Piston force = Booster force (pretension force = rate of spring x movement of piston) = 2348.32- (15N + 8 N/m x 6.38) = 2348.32- 66.04 = 2282.28N Pressure = Force Area of piston = 2282.28N 0.25TT D2 = 2282.28N 0.25TT (26 x 10-3 )2 = 42986.52 Pa or 4.29mpa Caliper force = Pressure x area x number of pistons = 42986.52 Pa x 0.25TT (46 x 10 3)2 x 2 = 14287.88 N Transmitted force = Caliper Force x Co efficient of friction x number of pads = 14287.88 N x 0.35 x 2 = 10001.51 N Torque = Transmitted force x Effective radius =10001.51 N x 0.125 m = 1250.18 Nm Tractive = Torque Radius of wheel = 1250.18 Nm 0.35m = 3571.97N Tractive = Tractive for 2 pot caliper tractive for 1 pot caliper = 3571.97N 1785.985N = 1785.985N My thoughts After going through and researching all types of brakes and what there application is in todays modern motor vehicles, it showed that there are many uses for different types of brakes, especially when youre driving in different situations and environments, e.g. When driving in the city, you tend to use more of the braking system and when driving in the country you need heavy duty pads. It is essential that we know how the brakes work, and it is important to use the right type of brake pads for each different driving application. Some brakes work well once they are heated up and some work well in the colder conditions. So when we go get our brake pads changed its up to the mechanic to make that call to see what pads should be used for the correct braking situation. This will save damage to the brake disc and stop it from causing further damage to anything else. My concept is to some how get a recording device or some type of sensor that has a memory in which it recalls everything that you have done in regards to the braking system and the brake pads. This will keep a record of your amount of braking you have done and also what type of conditions you have been driving in. So this could tell you that you have been driving in a cold area but doing lots of braking , so when it come to changing these pads you could just unplug the sensor and check and make your own decision upon the type of pads that will suit to your braking application. Advantages of this concept are: The temperature will always be monitored You know exactly when you need to change you brake pads You know how much you are actually using the braking system You know exactly which brake pad is suited for the application No problems of over heating You know if there are any problems in regards to damage of brakes or discs

Gray-Hat Hacking Essay -- Computers Technology Hackers Essays Research

Gray-Hat Hacking Overview Computer security is a growing concern with the onset of always-on connections in the home and the emerging global network. More and more people become connected everyday. The reliance on computers in our daily lives has increased the need for security and has shifted the ethical line for hackers and hacking. â€Å"A hacker is someone with deep knowledge of and great interest in a system. A hacker is someone who likes to delve into the inner workings of a system to find out how it works.†2 The definition of a hacker has been skewed in recent years by the press to connotate people who break into computer systems. The term has also evolved to represent people who protect computer systems and those that break into them. These newly termed hackers can be classified into three categories white-hat, black-hat, and gray-hat hackers. White-hat hackers are employed by corporations and work on the good side to secure computer systems without breaking into them. Black-hat hackers work on the bad side and attempt to compromise systems in illegal ways. Gray-hat hackers occupy the gray space of hacking and break into systems to learn and expose flaws, often as a service to the computer community. The ethical line dividing white-hat hackers and black-hat hackers is clear. However, the line that separates gray-hat hackers from black-hat hackers is constantly shifting in the new global network. Hacking that may have been considered ethical yesterday may not be true today due to the impact on global systems in the form of dollars loss and downtime. Hacking has evolved from simply having knowledge of systems by harmlessly breaking into them to an issue of security and computer crimes (cybercrimes). Hacking attac... ...um Copyright Act, 1998, http://www.copyright.gov/legislation/dmca.pdf 5 Deborah Radcliff, Playing by Europe’s rule, 2001, http://www.computerworld.com/securitytopics/security/story/0,10801,62057,00.html 6 US Department of Justice, Federal Computer Intrusion Laws, http://www.usdoj.gov/criminal/cybercrime/cclaws.html 7 Council of Europe, Convention on Cybercrime CETS No.:185, 2001, http://conventions.coe.int/Treaty/EN/cadreprincipal.htm 8 CSI / FBI, Computer Crime and Security Survey, 2003, http://i.cmpnet.com/gocsi/db_area/pdfs/fbi/FBI2003.pdf 9 George W. Bush, President’s Message to the Senate on the Council of Europe Convention on Cybercrime, 2003, http://www.usdoj.gov/criminal/cybercrime/senateCoe.pdf 10 US Department of Justice, FAQ on Council of Europe Convention on Cybercrime, 2003, http://www.usdoj.gov/criminal/cybercrime/COEFAQs.htm