Christianity And The New World - 2275 Words

As once written by a famous reverend, Early American Puritans aimed to â€Å"†¦write the wonders of the Christian religion, flying from the deprivation of Europe, to the American Strand† (Manther 75). Although this idea of a Christian utopia in the New World was first imagined several hundred years ago, its impact is still present. Since the time that the Puritans first began their memorable legacy in the early seventeenth century, ideas towards Christianity in the United States have significantly changed due to the diversity in civilization, politics, and religion that have developed over a time period of almost 240 years. The harsh and often domineering laws of the Puritans led to its breakup several years later. However, this division led†¦show more content†¦The Puritans used this to beg the congregation to ask for forgiveness and turn away from their sins. They did this is an attempt to restore Puritanism and faith in God. Today, though not used in a m anner as harsh as the Puritans, messages from the Jeremiads are still preached in the State of the Union addresses and on the Fourth of July. For example, the ideas of being aware of enemies, rejecting corruption, and working together to achieve superiority above other nations are commonplace in these addresses today. However, the idea that is most present is Manifest Destiny. Established by the Puritans, Manifest Destiny is the concept that Americans have a divine responsibility to spread their beliefs and boundaries as far as they can. In the State of the Union address in 2011, President Obama stated that â€Å"we have to make America the best place on earth† and that the United States needs to continue â€Å"maintaining our leadership.† In addition, the President said that â€Å"may God bless the United States of America.† Similarly, the famous Puritan leader known as John Winthrop shared a similar message in his â€Å"The City upon a Hill† sermo n in 1630. Referring to the Puritans and people of the New World, he said that â€Å"†¦we shall be as a city upon a hill. The eyes of all people are upon us.† Though Winthrop would not live to see the larger impact of these words, his ideas and the beliefs of his people would

Nine Stories Free Essays

string(92) " and it parallels the dead Easter chick \(death=death of innocence/hope\) in the last line\." Analysis: Nine Stories by JD Salinger For those like me who couldn’t find any insightful analyses about this collection on the Internet: You’re welcome. I have finally figured out what this is about (I think). So the fancy book club met a couple weeks ago to discuss Nine Stories by JD Salinger. We will write a custom essay sample on Nine Stories or any similar topic only for you Order Now Much despair was had because of our varied and confused insights into Salinger’s stories. Was Seymour a pedophile? What’s up with the random last line in â€Å"Just Before the War with the Eskimos? † How should we interpret Nine Stories? And although I haven’t answered most of these questions, I can at least answer the last. So for those of who don’t know how to absorb the collection, here’s a little solace: All of these short stories are about the loss of innocence and the attempt to gain it back. The characters are stuck between innocence and adulthood. And, interestingly, nearly all of the stories feature an interaction between a child and an adult, the child generally being an ideal or a tool for the adult to regain innocence – but not always. In some, even the child is struggling with the loss of ideals. Seymour Glass is the main character in â€Å"A Perfect Day for Bananafish,† and he’s recently returned from the war with mental wounds serious enough to require psychiatric help. The first half of the story shows a telephone conversation between his new wife, Muriel, and her mother. Their discussion revolves around Seymour’s problems, and – when compared to our firsthand experience with those problems – we realize how little they grasp and how little either of them has invested in his well-being. In the second part of â€Å"Bananafish† Seymour speaks with a young girl named Sybil about catching (mythical) bananafish – a fish whose quest for food leads to its a demise. The encounter is a bit disturbing – sexual language abound – and we get a feel for Seymour’s anguish, although specifics are murky. Salinger uses every word to his advantage – in a very subtle way – and, needless to say, the encounter is quite unsettling. We have that distress confirmed when, at the end of the story, Seymour retires to the hotel room – where his wife is sleeping – sits next to her, and shoots himself. The significance of the bananafish is, of course, Seymour’s alignment with it. The fish’s quest for food translates to Seymour’s quest for innocence. His quest, like the fish’s, ends in death. Sybil represents Seymour’s ultimate goal, which is why their interaction is so unnerving. It seems, on the outside, like he’s preying on her (like the bananafish does its food), but he’s actually after what she represents: innocence. He gets his fill and bloats so that he can’t fit back into a world where people like his wife and mother-in-law rule. They are Sybil’s antithesis, and Seymour is caught between the two different existences. It’s in this limbo where Seymour – and many of Salinger’s protagonists in Nine Stories – perish. Eloise and Mary Jane are former college roommates who reconnect in â€Å"Uncle Wiggily in Connecticut† (my personal fave). Mary Jane visits Eloise at her house, and thus ensues a night of drunken revelations. Immediately, Eloise appears unhappy to the point of severity, and Mary Jane takes a back seat to Eloise’s readily apparent issues. We learn that Eloise lost the love of her life in the war (a common villain in Nine Stories) and has resigned herself to a lackluster, unwanted marriage. She’s so unsatisfied with her life and her past that she takes it out on everyone, especially her daughter Ramona who has an imaginary friend – symbolic of dreamy innocence and also indicative of a void she’s trying to fill (the lack of compassion from her mother). In one poignant scene in â€Å"Uncle Wiggily,† Eloise berates Ramona with incredible rage. In the end – after a LOT of alcohol – Eloise admits her weakness: transposing her anger onto others. She resents the loss of her first love, resents her loss of innocence, and resents the people who still have it. It’s really an agonizing story about lost hope, the recognition of no longer having hope, and the desperation to – if nothing else – remember what it’s like to have hope. She’s trapped in a sort of external realm, watching herself, aware of her circumstance, and yet not being capable of moving forward. â€Å"Just Before the War with the Eskimos† is about a frugal young girl, Ginnie, who comes into her friend, Selena’s home to collect a cab fare and encounters her brother, Franklin, a grubby Holden Caulfield-type of character. â€Å"Eskimos† really eludes any obvious meaning, but it’s in there †¦ somewhere. Okay, here goes †¦. he larger theme is war. It’s the backbone of most of Nine Stories. Franklin was not drafted, because he has a bad heart, and he and Ginnie talk about this briefly, but long enough for Ginnie to connect it with what they are subconsciously discussing: rejection. From the get-go â€⠀œ with her demanding to be reimbursed for the cab fare – Ginnie appears to be a girl who takes things for granted; she gets everything she wants. Ginnie’s not deliberately mean, but she doesn’t accept things as they are, but rather demands that they be how she wants them and easily dismisses things/people she doesn’t care for. She wants to throw the furniture in Selena’s home out the window, for example. Then, in walks Franklin, who is boldly himself. Their conversation begins with his rejection from the draft, then moves to his rejection by Ginnie’s sister, then Ginnie’s rejection of the sandwich he offers her. Ginnie is connecting with a person who has been rejected his whole life by people like her and the types of institutions that she represents. Unconsciously, Ginnie links her behavior with the behavior of war, and in the end, decides to keep the sandwich – a growth in character. The sandwich is sort of symbolic of the rejection Franklin has experienced in the past(his loss of innocence), and it parallels the dead Easter chick (death=death of innocence/hope) in the last line. You read "Nine Stories" in category "Essay examples" I may be stretching it, but the story is so tightly wound that it’s hard to unravel. Ginnie is undoubtedly changed for the better because of her interaction with Franklin. Her taking the sandwich may have given him hope for future acceptance, and he gave Ginnie forgiveness and a little child-like compassion. Eh? â€Å"The Laughing Man† – Yeesh. This story is a mind-squeeze if I ever saw one, but I think I’ve got it figured out. The premise is that a college-aged guy takes a bunch of young boys on little â€Å"field trips† – to the baseball diamond, for example (What are his motives? Where are these boys’ parents and how do they feel? I don’t know, but alas †¦ ) During these outings, The Chief – as he’s called – narrates a fable about The Laughing Man, a sort of creepy-roguish-Robin Hood character with a deformed face, a sense of adventure, and an Inspector Clouseau type-of-character after him. â€Å"The Laughing Man† may or may not be narrated by Buddy Glass, a member of Salinger’s Glass family. The boys-only outine comes to a halt when The Chief’s girlfriend, Mary Hudson, starts tagging along, presumably because of dentists’ appointments she has in the city. With the entrance of Mary, the Laughing Man’s fate takes a turn for the worse. The narrator notices frustration between Mary and The Chief, and in the end, the Lau ghing Man meets his maker and the boys never see Mary Hudson again. â€Å"The Laughing Man† is primarily a story about lost innocence. The Chief, a college student, spends his afternoons with relatively young boys – questionable, but without a doubt, an attempt to sustain his youth. Immediately, with the entrance of Mary Hudson, the narrator senses stress between her and the Chief. The Laughing Man symbolizes boyhood and innocence, and when Mary Hudson arrives, the Laughing Man’s fate becomes less certain. Thanks to Wikipedia, a plausible explanation would be that Mary Hudson is pregnant and is actually coming into the city for doctor’s visits, not dentist appointments. (Who has frequent dentist appointments? ) This is most likely the case, but it’s irrelevant. The moral of the story – and what the Chief is teaching the boys through the Laughing Man’s story – is that boyhood ends. Innocence ends. Kind of depressing, but there it is, consistent with the rest of Nine Stories. â€Å"Down at the Dinghy† opens with two house servants discussing Lionel, the son of Boo Boo Glass (their employer). (Another Glass appearance – woohoo! ) We gather from their conversation that Lionel has a penchant for running away. One of them is also concerned that Lionel will repeat something she said (apparently, he has a penchant for that as well). Thus, after Boo Boo arrives at the house, speaks with the women for a moment, and goes down to the pier to see Lionel, he’s trying to sail away. Where the Wild Things Are? anyone? The rest of the story is devoted to Boo Boo’s attempt to entice Lionel back to shore, as it were. She tries to go with him, tries to find out why he’s leaving (one of the house servants called his dad a kike), and then finally challenges him to a race back to the house. (Lionel wins. ) â€Å"Down at the Dinghy† is so understated that it seems like a â€Å"day-in-the-life. † But Salinger isn’t a â€Å"day-in-the-life† kinda guy. Soooooooooo †¦. I’m gonna squeeze this baby open. Two instances in this story are noticeably darker than the rest: the housekeeper calling Lionel’s father a kike and Lionel wearing Seymour’s goggles. Seymour was Boo Boo’s brother). Now, Lionel’s problem isn’t as shallow as â€Å"a boy with a penchant for running away. † These two instances are more significant than the anatomy of â€Å"Down at the Dinghy† would lead you to believe. This young boy has recently (I’m assuming) lost his uncle, and additionally, he believes that other people think poorly of his father. It’s a double-blow, and Lionel reacts by running away. What seems like a story about a kid just being a kid, read from this perspective, transforms into a story about a person grappling with the loss of ideals. Lionel is realizing that the world is not as it seems; there’s more going on. I believe he feels blindsided. Lionel throwing Seymour’s goggles into the water is so significant, because he’s disposing of distractions from the truth. Finally, Boo Boo coaxes him back into being a kid, distracts him from his disillusionment. So there is Lionel, another of Salinger’s characters who is straddling the line between innocence and adulthood. â€Å"For Esme – with Love and Squalor† is one of Salinger’s more obvious stories. During the war, Sergeant X recollects his brief but impressionable meeting with Esme, a young girl in a restaurant before the war. Esme† is totally simple, thus it doesn’t need to be dissected; I don’t even need to give you a rundown of their interaction. Basically, Esme represents innocence for Sergeant X during the war, a time of â€Å"squalor† and adult concerns. Innocence and squalor both constit ute the sergeant’s existence. â€Å"Pretty Mouth and Green My Eyes† relates a phone call between Lee and Arthur. Arthur believes his wife, Joanie, is having an affair, while we’re led to believe that the woman with Lee is in fact Joanie. Arthur’s life appears to be in shambles (lost a court case, wife cheating on him, etc. , but soon after the two men hang up, Arthur calls Lee back and makes up a story about Joanie coming back home even though she’s still with Lee. Arthur is, for all intents and purposes, a man who prides himself on having a trophy job and a trophy wife, two naive ideals. When those ideals are torn down – in a sheer act of childish pride – Arthur pretends they still exist. This would generally go unnoticed, but is readily apparent to Lee and Joanie, hence why Salinger chose to tell the story through their points of view. De Daumier-Smith’s Blue Period† is about a pretentious young man (De Daumier) who fak es his way into a professorship at an art school. Once there, he reviews his pupils’ work and struck by a religious painting by a nun. That’s basically it. De Daumier-Smith is a wayfarer, devoid of spirituality and ideals, extremely pretentious and this piece of art forces him to question his convictions. â€Å"Blue Period† is about a man who pretends to be a complex â€Å"adult† but is stripped of his pretensions through an artist who evokes spirituality and idealism. Teddy† is a boy genius/profit who has an existential conversation aboard a ship with Nicholson, a curious grad student. Teddy believes in past lives and karma, and – from what I know about Salinger – represents his spirituality du jour. Salinger, in every one of his Nine Stories, is painting innocence the protagonist and adulthood the villain but is concerned with those characters torn between the two. â€Å"Teddy† rounds out the collection nicely, because its mai n character lives and dies by his ideals. Teddy is the martyr of Nine Stories and he’s meant to be the example for its characters, readers, and even its author. More analysis: Moon By Chaim Potok How to cite Nine Stories, Essay examples

Like Black Smoke free essay sample

Cameryn Padron 11/22/12 Per 6 The article Like Black Smoke and the article A World Turned Upside Down both mainly discuss about a horrible and deadly diseas called the bubonic plague. Like A World Turned Upside Down the author is mainly describing how black death swept through and has effected Europe and changed everything in the old times. In the article Like Black Smoke the author is telling how the black death spread, where it came from, and where it traveled. Like Black Smoke was to explain how the bubonic plague spread, where it came from, and where it traveled too. For example it spread to the east and it started from fleas. Similarity to both articles is that their purpose was how it effected both areas, killed millions of people, and traveled eastward. In contrast the article A World Turned Upside Down gives facts on the population, what it was like in the middle ages, and how people had to adapt to the black plague. We will write a custom essay sample on Like Black Smoke or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page In A World Turned Upside Down the author Christopher Hill is describing what happened in the mid ages in Europe and showing the relations between rich classes and poor classes during the plague. In addition to that it describes how people tried to survive it and how everything changed during that time. Like Black Smoke the author Diana Childress takes a look at the spread Black Death, which struck in Europe in the middle ages. The disease transfers from fleas, to rodents, then to humans. It spread to the east causing millions of deaths. Likewise, both articles have the main idea about discussing the black death. Like Black Smoke it is chronological order because it is out into sections that are ordered on how the black death was formed. For example, it started with where it came from, fleas, then it went onto how it effected people, then to how people survived it, and lastly where it spread too, the east. A World Turned Upside Down its organization is cause and effect. For example when something happened during the black death here was always an effect to it. In conclusion, Like Black Smoke and the article A World Turned Upside Down is that their purpose was how it effected both areas, killed millions of people, and traveled eastward. Also both articles have the main idea about discussing the black death. Both were set up in a type of organization to understand the articles better and how everything was caused. Finally they were both used in the middle ages in Europe and talked about the deadly bubonic plague.

Telemedicine and Medical Information Essay Sample free essay sample

Good wellness is an of import facet of people’s lives. which is why it is sad that there are those who can non afford to obtain medical attention from professionals. Fortunately. telemedicine was developed and clinicians are now able to pattern medical specialty even when in between a great distance. There are legion web sites on the Internet that cater telemedicine and supply medical information and services to the populace. One such web site is the Apollo Telemedicine Networking Foundation. In 1983. Dr. Prathap Reddy â€Å"founded the first Apollo infirmary with the exclusive aim of giving everyone in demand an chance to have the best medical attention the universe had to offer† ( Apollo Telemedicine Networking Foundation ) . The organisation so evolved in December 2003 â€Å"to develop and promote telemedicine and distant medical installations in distant countries and to supply communicating amongst medical community by airing of specialised medical cognition through a technologically advanced network† ( Apollo Telemedicine Foundation Network ) . We will write a custom essay sample on Telemedicine and Medical Information Essay Sample or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Harmonizing to its web site. its merchandises include Medintegra. Medintegra WEB. Medintegra GoLive. which are applications designed to run into the demands of medical practicians and constitutions who are involved in telemedicine. They are involved in teleradiology. audience on telemedicine services. telemedicine web design and execution. telemedicine package. medical hardware. communicating links. forte audiences by the infirmary. and other services. Overall. the web site is first-class in specifying telemedicine and bespeaking what it does or does non embrace. Linkss are provided to direct the populace to its merchandises and services. There is besides a manner to reach the foundation in instance persons or other organisations decide to utilize their services. This web site was chosen. and would even be recommended to others. because unlike other web sites. Apollo Telemedicine is clear. concise. and user-friendly. It besides has a professional feel to it because the web site is decently designed with images. links. and contact information. Mention Apollo Telemedicine Networking Foundation. ( n. d. ) . Retrieved July 17. 2008. from hypertext transfer protocol: //www. telemedicineindia. com/index. htm

Gender inequality in Algeria

Gender inequality in Algeria Historically, men have always dominated in both social and private lives of women and Algeria is not any different. Algerian women had to suffer extreme hardships from French colonizers and then their husbands and government. Women have had a deciding role in Algeria gaining its independence from France but this did not change the matter of things and cruel and unusual treatment that they receive today, should not be tolerated or allowed.Advertising We will write a custom essay sample on Gender inequality in Algeria specifically for you for only $16.05 $11/page Learn More Zahia Smail Salhi in an article titled â€Å"The Algerian feminist movement between nationalism, patriarchy and Islamism† talks about the abuse Algerian women have received at the hand of the French colonizers. They were sexually assaulted, auctioned, killed and dehumanized. It is extremely difficult to accept that mere one hundred and fifty to two hundred years ago, a civilized Euro pean nation, France, could allow such atrocities to happen. Soldiers behaved like savages excluding themselves from all that is human. Women had no way of fighting back, as Algerian men were also being colonized. This added even more hardships to women because they would suffer from their husbands too, who were angry and mistreated by the French colonizers. Then, the French realizes that the key to overtake Algeria is to strike at its heart, which was women and their preservation of homes and tradition. They set out to assimilate female population and the treatment worsened. Women had no choice but to fight back and they took up arms. They led active warfare against soldiers and patrols and finally succeeded. At the time the French were still present and Algeria was a colony, women’s rights movement has begun; this took place in 1940 (Salhi, 2010). Catherine Lloyd describes the next era that has begun when women started a revolution and the feminist movement has gained great momentum. The article â€Å"From taboo to transnational political issue: Violence against women in Algeria† describes the revolution at the time of occupation by French, which added even larger strain to the conditions in the country. The French realized that they had to fight against the whole nation and their cruelty increased, â€Å"it was estimated that Algeria lost a quarter of its population, in the period up to independence in 1962† (Lloyd, 2006). Women’s protests and fighting for their rights continued on two fronts, one was the French domination and the other was their own national government and male population, with a view that segregated and dehumanized women. It seems unacceptable and unimaginable that some twenty years ago, in the modern age of human rights and freedoms, women had to and still suffer such abuse. The most despicable fact is that during the colonization and the Revolution women would fight alongside men and there would marriages betw een comrades.Advertising Looking for essay on history? Let's see if we can help you! Get your first paper with 15% OFF Learn More The Algerian society was united where women were appreciated and enjoyed equal treatment and authority. But after the war has ended and women returned to their homes, men went back to their old ways and continued to deny women of their rights and freedoms. This sort of treatment led to the next period of fighting of women for their equality that continues in the present times. An article titled â€Å"Women and politics in Algeria from the war of Independence to our day† by Djamila Amrane rightfully signifies an important and deciding role that women played in the independence of Algeria. It centers on the help that they provided in the following years but acknowledgement of their input disappeared, as if it did not exist. The fact that women helped to build back the ruins of society and the heroism they showed in the war eff orts, was forgotten by their husbands and the government. Men would get divorced from their wives and get married to younger women and this left their previous wives homeless and with children. The laws deprived the female population of all rights, giving full authority to the man. The government kept reinforcing policies that were degrading and unjust to women. It was forgotten that more than ten thousand women fought for Algeria and helped society get back on its feet. Women would not be allowed to work in professions that required formal and higher education, they would be denied to unveil themselves in public and any form of protest was strictly prosecuted (Amrane, 1999). Governmental and social abuse of female population continued to the modern times and is described by Karima Bennoune in an article â€Å"The war against women in Algeria†. Again, women were forced to form underground organizations and the fierce and determined women’s movement resumed its strength . As if this was not enough, the nineties and the modern days have brought about an Armed Islamic Group that would openly shoot and kill women in public. The religious fundamentalists would and trained militants would subject women who did not wear their veil to inhuman suffering. There are a number of cases where students would get acid thrown in their faces if they appeared in public without a veil, young girls and women would get kidnapped, assaulted and killed (Bennoune, 1995). The modern times have brought about same harsh and beast-like treatment of women.Advertising We will write a custom essay sample on Gender inequality in Algeria specifically for you for only $16.05 $11/page Learn More All four articles describe horrific treatment of women in different periods of time by men and government. Women are still forced to meet in secret and fight against traditions that are not relevant anymore. The long history of women’s fighting and protection of their nation was not enough to change the world. Women deserve equal rights, freedom and respect, as much as men do, if not more. References Amrane, D. (1999). Women and politics in Algeria from the war of Independence to our day. Research in African Literatures. 30(3), 62-77. Bennoune, E. (1995). The war against women in Algeria. Ms, 6, 22. Lloyd, C. (2006). From taboo to transnational political issue: Violence against women in Algeria. Womens Studies International Forum. 29(5), 453–462. Salhi, Z. (2010). The Algerian feminist movement between nationalism, patriarchy and Islamism. Womens Studies International Forum. 33(2), 113–124.

Acquisition is a High Risky Strategy

In the literature, several motives for takeovers have been identified. One is the desire for synergy. That is, similarities or complementarities between the acquiring and target firms are expected to result in the combined value of the enterprises exceeding their worth as separate firms (Collis and Montgomery, 1998). A second motive involves the expectation that acquirers can extract value because target companies have been managed inefficiently (Varaiya, 1987). A third motive is attributed to managerial hubris the notion that senior executives, in overestimating their own abilities, acquire companies they believe could be managed more profitably under their control. Agency theory motive is the anticipation that firm expansion will positively impact the compensation of top managers since there tends to be a direct relation between firm size and executive pay. Contemporary specialists contend that managerial ownership incentives may be expected to have divergent impacts on corporate strategy and firm value. This premise has been recognized in previous studies. For instance, Stulz (1988) has examined the ownership of managers of target companies and has proposed that the relationship between that ownership and the value of target firms may initially be positive and then subsequently become negative with rising insider ownership. Moreover, Shivdasani (1993) empirically shows that the relationship of the ownership structure of target companies with the value of hostile bids is not uniformly positive. McConnell and Servaes (1990) have likewise analyzed the relationship of equity ownership among corporate insiders and Tobins q. Their results demonstrate a non-monotonic relation between Tobins q and insider equity stakes. Wright et al. (1996: 451) have shown a non-linear relationship between insider ownership and corporate strategy related to firm risk taking. Ownership Incentives and Changes in Company Risk Motivating Acquisitions An agency-theoretic motive for acquisitions has been used to explain managerial preferences for risk-reducing corporate strategies (Wright et al., 1996). The implication is that both principals and agents prefer acquiring target companies with higher rather than lower returns. In that, shareholders and managers have congruent interests. The interests, however, diverge in terms of risk considerations associated with acquisitions. Because shareholders possess diversified portfolios, they may only be concerned with systematic risk and be indifferent to the total variance of returns associated with a takeover. Senior managers may alternatively prefer risk-reducing corporate strategies, unless they are granted ownership incentives. That is because they can not diversify their human capital invested in the firm. In the literature, it has been argued that agency costs may be reduced as managerial ownership incentives rise. The reason is that, as ownership incentives rise, the financial interests of insiders and shareholders will begin to converge. Analysts conjecture, however, that such incentives may not consistently provide senior executives the motivation to lessen the agency costs associated with an acquisition strategy. Inherent is the presumption that the nature of executive wealth portfolios will differently influence their attitudes toward corporate strategy. The personal wealth portfolios of top managers are comprised of their ownership of shares/options in the firm, the income produced from their employment, and assets unrelated to the firm. Presumably, as senior executives increase their equity stakes in the enterprise, their personal wealth portfolios become correspondingly less diversified. Although stockholders can diversify their wealth portfolios, top executives have less flexibility if they own substantial shares in the firms they manage. Hence, if a significant portion of managers wealth is concentrated in one investment, then they may find it prudent to diversify their firms via risk-reducing acquisitions. In the related literature, however, takeovers and risk taking have been approached differently from the described approach. Amihud and Lev (1999) have contended that insiders employment income is significantly related to the firms performance. Thus, managers are confronted with risks associated with their income if the maintenance of that income is dependent on achieving predetermined performance targets. Reasonably, in the event of either corporate underperformance or firm failure, CEOs not only may lose their current employment income but also may seriously suffer in the managerial labor market, since their future earnings potential with other enterprises may be lowered. Hence, the risk of executives employment income is impacted by the firms risk. The ramification of Amihud and Levs (1999) contentions is that top managers will tend to lower firm risk, and therefore their own employment risk, by acquiring companies that contribute to stabilizing of the firms income, even if shareho lder wealth is adversely affected. Consistent with the implications of Amihud and Levs arguments, Agrawal and Mandelker (1987) have similarly suggested that managers with negligible ownership stakes may adopt risk-reducing corporate strategies because such strategies may well serve their own personal interests. With ownership incentives, however, managers may be more likely to acquire risk-enhancing target companies, in line with the requirement of wealth maximization for shareholders. The notion that at negligible managerial ownership levels, detrimental risk-reducing acquisition strategies may be emphasized, but with increasing ownership incentive levels, beneficial risk-enhancing acquisitions may be more prevalent is also suggested in other works (Grossman and Hoskisson, 1998). The conclusion of these investigations is that the relationship between insider ownership and risk enhancing, worthy corporate acquisitions is linear and positive. Some experts assert that CEOs personal wealth concentration will induce senior managers to undertake risk-reducing firm strategies. Portfolio theorys expectation suggests that investors or owner-managers may desire to diversify their personal wealth portfolios. For instance, Markowitz (1952: 89) has asserted that investors may wish to diversify across industries because firms in different industries. . . have lower covariances than firms within an industry. Moreover, as argued by Sharpe (1964: 441), diversification enables the investor to escape all but the risk resulting from swings in economic activity. Consequently, managers with substantial equity investments in the firm may diversify the firm via risk-reducing acquisitions in order to diversify their own personal wealth portfolios. Because they may be especially concerned with risk-reducing acquisitions, however, their corporate strategies may not enhance firm value through takeovers, although managerial intention may be to boos t corporate value. The above discussion is compatible with complementary arguments that suggest that insiders may acquire non-value-maximizing target companies although their intentions may be to enhance returns to shareholders. For instance, according to the synergy view, while takeovers may be motivated by an ex-ante concern for increasing corporate value, many such acquisitions are not associated with an increase in firm value. Alternatively, according to the hubris hypothesis, even though insiders may intend to acquire targets that they believe could be managed more profitably under their control, such acquisitions are not ordinarily related to higher profitability. If acquisitions which are undertaken primarily with insider expectations that they will financially benefit owners do not realize higher performance, then those acquisitions which are primarily motivated by a risk-reducing desire may likewise not be associated with beneficial outcomes for owners. Additionally, it can be argued that shareholders can more efficiently diversify their own portfolios, making it unnecessary for managers to diversify the firm in order to achieve portfolio diversification for shareholders. Risk Associated with HRM practices in International Acquisitions There are a number of reasons why the HRM policies and practices of multinational corporations (MNCs) and cross-border acquisitions are likely to be different from those found in domestic firms (Dowling, Schuler and Welch, 1993). For one, the difference in geographical spread means that acquisitions must normally engage in a number of HR activities that are not needed in domestic firms such as providing relocation and orientation assistance to expatriates, administering international job rotation programmes, and dealing with international union activity. Second, as Dowling (1988) points out, the personnel policies and practices of MNCs are likely to be more complex and diverse. For instance, complex salary and income taxation issues are likely to arise in acquisitions because their pay policies and practices have to be administered to many different groups of subsidiaries and employees, located in different countries. Managing this diversity may generate a number of co-ordination and communication problems that do not arise in domestic firms. In recognition of these difficulties, most large international companies retain the services of a major accounting firm to ensure there is no tax incentive or disincentive associated with a particular international assignment. Finally, there are more stakeholders that influence the HRM policies and practices of international firms than those of domestic firms. The major stakeholders in private organizations are the shareholders and the employees. But one could also think of unions, consumer organizations and other pressure groups. These pressure groups also exist in domestic firms, but they often put more pressure on foreign than on local companies. This probably means that international companies need to be more risk averse and concerned with the social and political environment than domestic firms. Acquisitions and HRM Practices: Evidence from Japan, the US, and Europe In contemporary context, international human resource management faces important challenges, and this trend characterizes many Japanese, US and European acquisitions.   From the critical point of view, Japanese companies experience more problems associated with international human resource management than companies from the US and Europe (Shibuya, 2000). Lack of home-country personnel sufficient international manage ­ment skills has been widely recognized in literature as the most difficult problem facing Japanese compa ­nies and simultaneously one of the most significant of US and European acquisitions as well. The statement implies that cultivating such skills is difficult and that they are relatively rare among businessmen in any country. Japanese companies may be particularly prone to this problem due to their heavy use of home-country nationals in overseas management positions. European and Japanese acquisitions also experience the lack of home country personnel who want to work abroad, while it is less of an impediment for the US companies. In the US acquisitions expatriates often experience reentry difficulties (e.g., career disruption) when re ­turning to the home country: This problem was the one most often cited by US firms.   Today Japanese corporations report the relatively lower incidence of expatriate reentry diffi ­culties, and it is surprising given the vivid accounts of such problems at Japanese firms by White (1988) and Umezawa (1990). However, the more active role of the Japanese person ­nel department in coordinating career paths, the tradition of semi ­annual musical-chair-like personnel shuffles (jinji idoh), and the continu ­ing efforts of Japanese stationed overseas to maintain close contact with headquarters might underlie the lower level of difficulties in this area for Japanese firms (Inohara, 2001). In contrast, the decentralized structures of many US and European firms may serve to isolate expatriates from their home-country headquarters, making reentry more problematic. Also, recent downsiz ­ing at US and European firms may reduce the number of appropriate management positions for expatriates to return to, or may sever expatri ­ates relationships with colleagues and mentors at headquarters. Furthermore, within the context of the lifetime employment system, individ ­ual Japanese employees have little to gain by voicing reentry concerns to personnel managers. In turn, personnel managers need not pay a great deal of attention to reentry problems because they will usually not result in a resignation. In western firms, reentry problems need to be taken more seriously by personnel managers because they frequently result in the loss of a valued employee. A further possible explanation for the higher incidence of expatriate reentry problems in western multinationals is the greater tendency of those companies to implement a policy of transferring local nationals to headquarters or other international operations. Under such a policy, the definition of expatriate expands beyond home-country nationals to en ­compass local nationals who transfer outside their home countries. It may even be that local nationals who return to a local operation after working at headquarters or other international operations may have their own special varieties of reentry problems. Literature on international human resource practices in Japan, the US and Europe suggest that the major strategic difficulty for the MNCs is to attract high-caliber local nationals to work for the company. In general, acquisitions may face greater challenges in hiring high-caliber local employees than do domestic firms due to lack of name recognition and fewer relationships with educators or others who might recommend candidates. However, researchers suggest that this issue is significantly more difficult for Japanese than for US and European multinationals. When asked to describe problems encoun ­tered in establishing their US affiliates, 39.5% of the respondents to a Japan Society survey cited finding qualified American managers to work in the affiliate and 30.8% cited hiring a qualified workforce (Bob SRI, 2001). Similarly, a survey of Japanese companies operating in the US conducted by a human resource consulting firm found that 35% felt recruiting personnel to be very difficult or extremely difficult, and 56% felt it to be difficult (The Wyatt Company, 1999). In addition to mentioned problem, Japanese acquisition encounter high local employee turnover, which is significantly more prob ­lematic for them due to the near-total absence of turnover to which they are accustomed in Japan. The US, European and Japanese companies admit very rarely that they encounter local legal challenges to their personnel policies. However, in regard to Japanese acquisitions large   amount of press coverage has been given to lawsuits against Japanese companies in the United States and a Japanese Ministry of Labor Survey in which 57% of the 331 respondents indicated that they were facing potential equal employ ­ment opportunity-related lawsuits in the United States (Shibuya, 2000). Conclusion This research investigates whether corporate acquisitions with shared technological resources or participation in similar product markets realize superior economic returns in comparison with unrelated acquisitions. The rationale for superior economic performance in related acquisitions derives from the synergies that are expected through a combination of supplementary or complementary resources. It is clear from the results of this research that acquired firms in related acquisitions have higher returns than acquired firms in unrelated acqui ­sitions. This implies that the related acquired firm benefits more from the acquirer than the unrelated acquired firm. The higher returns for the related acquired firms suggest that the combination with the acquirer’s resources has higher value implications than the combination of two unrelated firms. This is supported by the higher total wealth gains which were observed in related acquisitions. I did however, in the case of acquiring firms, find that the abnormal returns directly attributable to the acquisition transaction are not significant. There are reasons to believe that the announcement effects of the transaction on the returns to acquirers are less easily detected than for target firms. First, an acquisition by a firm affects only part of its businesses, while affecting all the assets (in control-oriented acqui ­sitions) of the target firm. Thus the measurability of effects on acquirers is attenuated. Second, if an acquisition is one event in a series of implicit moves constituting a diversification program, its individual effect as a market signal would be mitigated. It is also likely that the theoretical argument which postulates that related acquisitions create wealth for acquirers may be underspecified. Relatedness is often multifaceted, suggesting that the resources of the target firm may be of value to many firms, thus increasing the relative bargaining power of the target vis-a-vis the potential buyers. Even in the absence of explicit competition for the target (multiple bidding), the premiums paid for control are a substantial fraction of the total gains available from the transaction. For managers, some implications from the research can be offered. First, it seems quite clear from the data that a firm seeking to be acquired will realize higher returns if it is sold to a related than an unrelated firm. This counsel is consistent with the view that the market recognizes synergistic combinations and values them accordingly. Second, managers in acquiring firms may be advised to scrutinize carefully the expected gains in related and unrelated acquisitions. For managers the issue of concern is not whether or not a given kind of acquisition creates a significant total amount of wealth, but what percentage of that wealth they can expect to accrue to their firms. Thus, although acquisitions involving related technologies or product market yield higher total gains, pricing mechanisms in the market for corporate acquisitions reflect the gains primarily on the target company. Interpreting these results conservatively, one may offer the argument that expected gains for acquiring firms are competed away in the bidding process, with stockholders of target firms obtaining high proportions of the gains. On a pragmatic level this research underscores the need to combine what may be called the theoretical with the practical. In the case of acquisitions, pragmatic issues like implicit and explicit competition for a target firm alter the theoretical expectations of gains from an acquisition transaction. Further efforts to clarify these issues theoretically and empirically will increase our understanding of these important phenomena. Bibliography Sharpe WF. 1964. Capital asset prices: a theory of market equilibrium under conditions of risk. Journal of Finance 19: 425-442 Markowitz H. 1952. Portfolio selections. Journal of Finance 7: 77-91 Grossman W, Hoskisson R. 1998. CEO pay at the crossroads of Wall Street and Main: toward the strategic design of executive compensation. Academy of Management Executive 12: 43-57 Amihud Y, Lev B. 1999. Does corporate ownership structure affect its strategy towards diversification? Strategic Management Journal 20(11): 1063-1069 Agrawal A, Mandelker G. 1987. Managerial incentives and corporate investment and financing decisions. Journal of Finance 42: 823-837 Wright P, Ferris S, Sarin A, Awasthi V. 1996. The impact of corporate insider, blockholder, and institutional equity ownership on firm risk-taking. Academy of Management Journal 39: 441-463 McConnell JJ, Servaes H. 1990. Additional evidence on equity ownership and corporate value. Journal of Financial Economics 27: 595-612. Shivdasani A. 1993. Board composition, ownership structure, and hostile takeovers. Journal of Accounting and Economics 16: 167-198 Stulz RM. 1988. Managerial control of voting rights: financing policies and the market for corporate control. Journal of Financial Economics 20: 25-54 Varaiya N. 1987. Determinants of premiums in acquisition transactions. Managerial and Decision Economics 14: 175-184 Collis D, Montgomery C. 1998. Creating corporate advantage. Harvard Business Review 76(3): 71-83 White, M. 1988. The Japanese overseas: Can they go home again? New York: The Free Press. Bob, D., SRI International. 2001. Japanese companies in American communities. New York: The Japan Society.

Starbucks Coffee and Its Target Audience Essay Example | Topics and Well Written Essays - 2000 words

Starbucks Coffee and Its Target Audience - Essay Example According to the Italian tradition coffee houses are like a place for conversation and that provides the customers with a sense of community. From the very beginning Starbucks has been a very different company. The company has not only celebrated the coffee and rich tradition but also successfully brought a feeling of connection. The company endeavors to bring an exceptional experience to the lives of its target market (Clark, Taylor 2007; Starbucks Corporation 2011) Starbucks’ target audience mainly comprises of the upscale coffee drinkers. The coffee chain provides an opportunity to its customers to take a break from the busy and hectic lives and spend some time in a relaxing atmosphere. Starbucks has a very well defined target audience. It has a target market in each age segment whether its adults, young adults or kids and teens. The primary target market of Starbucks consists of men and women aged between 25 to 40 years from urban areas and usually with high incomes. This target segment accounts for almost half the sales of the Starbucks. In order to appeal this target audience Starbucks works keep its products current and position them in such a way that they become a status symbol. Then comes the target market of young adults aged between 18 to 24 years. This segment accounts for 40 percent of the sales of the company. ... It makes it easier for the students whether they want to hang in there and work on their projects or it can be that they just want to hang in there to enjoy the coffee. The relaxing atmosphere provided by the Starbucks stores is an appealing factor to both the adult and young adult target audience. Now moving to the third target market segment that Starbucks is serving, comprising of kids and teens aged between 13 to 17 years. Though this segment is not large and accounts for only 2 percent of the total Starbucks sales, but still the company focuses on this segment. The main reason for the focus is that it is mainly the parents who purchase items for their kids. There are several products that Starbucks has just made for the kids and teenagers. Starbucks do not target the kids segment directly but it does make sure that its products are kid-friendly. The company also offers special child sizes in order to attract the kids (Starbucks Corporation 2011) Starbucks has formed a strong bra nd image in the minds of its target audience. It has used the selective specialization, product specialization and market specialization techniques for selecting its market segments. Target audience of Starbucks trusts the brand and associates it with high quality. There are certain requirements that the target market has from this famous brand as they look up to it with great admiration. The store has created a sense of convenience in the minds of its customers. Almost where ever they go, especially in United States they’ll found a Starbucks franchise within the respective vicinity. This means that there are several places still left that do not cater to the target audience. These places do not have a Starbucks franchise and

Report of 500 words explaining the backgroung and history of APPLE Essay

Report of 500 words explaining the backgroung and history of APPLE COMPANEY - Essay Example History, 2008). The first graphical user interface was developed by the Xerox Corporation at their Palo Alto Research Center (PARC) in the 1970s. Steve Jobs visited Xerox Corporation and impressed by the GUI technology developed by Xerox, Steve bought Xerox Corporation in 1979 (Bellis, 2010). Lisa, the first commercial personal computer to employ a graphical user interface (GUI) was introduced by Apple in 1983. In fact Lisa was the first personal computer which introduced the mouse option for computers. Macintosh operating system was introduced in 1984. Portable computers or the PowerBook series was introduced by Apple in 1991. Because of the stiff competition from Microsoft and the resignation of its charismatic leader Steve from the CEO post, Apple Company faced many challenges in the 1990’s. In 1996, February, Apple gave license to Motorola to use their Mac OS. This is the first time when Apple gave sublicense to any other companies to use their Mac Operating System (History of Apple, 2007). â€Å"With the release of the iMac on August 15, 1998 Apple was able to put to rest some its past failures† (Dougherty, 2010). The introduction of the â€Å"i† series products like iMac, iphone, ipods, ipads etc during the latter part of 1990’s and in the early part of 2000 and the return of Steve as the CEO again in the latter part of 1990’s helped Apple to regain its lost market share. Steve has realized that in order to compete more effectively with the arch rival Microsoft, Apple needs some new challeng ing products apart from computers and operating system. The introduction of ipod music player in 2001 helped Apple to regain its lost customer base, especially the youth segment. Kim (2010) has pointed out that Apple Inc is currently the world’s second best company, just behind Exxon Mobil, as far as market capitalization is concerned (Kim, 2010). Moreover, Apple is the number one

The Externalizing Machine Essay Example for Free

The Externalizing Machine Essay In todays mostly capitalistic world people who are consumers think that they have power to decide what products to purchase; people who are stockholders are only interested in the profit; people who run corporations make that profit regardless of the price others have to pay; and people who live in developing countries work for 3c per hour making brand name cloths which then are sold for $20, $60, $100, $200, $500, making at the same time the corporations profit skyrocketing. It is widely known that there are sweatshops in developing countries, where people are treated like slaves but practically they are not slaves because they always can walk off the job. It is known that in such countries there is exploitation of child labor, but practically what can a citizen of other country do to help if they have enough their own problems. It is also known that work conditions in such factories are horrible, but what one can do if those companies offer lower prices. Is it fair towards society as a whole that some people are exploited so others can make skyrocketing profits? Is it fair that your TV was partially made by a 6-year-old child? Is it fair that the product you bought harms or even kills you or one of your family member? Is it fair if this does not happen to you but to some other people in some other countries? Is it fair that infants are given harmful baby-formula prohibited in developed countries? There are many questions that can be asked whether it is fair or not, but what happens if we interchanged the word fair with legal and instead we ask whether all those actions are legal or not, and who makes them legal or not. The author Joel Bakan of The Corporation tries to find an answer to those questions and tries to show what impact corporations actions may have on human beings and environment. Joel Bakan in his book brings up issues of sweatshops, environment pollution, externalities, government regulations, advertisement, and many others. He uses concepts of corporation as a psychopath and doom machine. By this Bakan means that corporations, in its pursuit of maximizing the profit at any cost, they destroy people, environment, and themselves at the same time. Even thought there are many important issues throughout the book my focus will be on chapter three Externalities. As the title of the chapter says the most important issue in it is externalities, the effect that corporations have on third parties. The author explains the concept of externalities and gives some examples; this chapter also focuses on the process of how corporations make decisions regarding the products safety, how they make decisions whether to improve products safety or not, or how they make decisions regarding the possible corporate options in the light of profit. The author used some concept and theories in this chapter so lets start with identifying and explaining them. First the concept of externalities. An externality is the effect of a transaction on a third party who has not consented to or played any role in carrying out of that transaction. ; the effect can be either good (creation of new jobs, lowering unemployment) or bad (pollution, diseases, deaths, etc). They literally mean other peoples problems. Whether or not exernalitie have good or bad impact they are only the result of pursuit to make higher profits, and are only the result of self-interest; furtheremore it does not matter for corporation whether the results of corporations decisions are good or bad externalities, as long as the profit raises. (pg60,61) Bakan uses the concept of doom machine (example of paper mill) to explain why corporations are successful in destroying world they operate in. The concept means that corporations dynamic does not take into account the concerns of flesh-and-blood human and that in our search for wealth and for prosperity, we create a thing thats going to destroy us (Monk pg71) The author also uses the concept of corporation as a pschopath which means that corporations are ego-centric, irresponsible or refuse to accept responsibility, have asocial tendencies, and they will do anything to satifsy their goal which is to maximize profit at all costs regardless what harm it may cause. The author assums that many, if not all, corporations make harmfull decisions that will eventually destroy the world, and at the same time will destroy the corporatins themselves. I think that Joel Bakans assmumptions are that all corporations do not care about the environment they operate in, that they would pollute everything to maximize profit, that the only guideline corporations use in making a decision is a cost-benefit analysis, and that eventhough corporations are made of individuals who would not want to harm other people together they would kill other people if it maximizes the profit. The author takes for granted that all corporations do not care, and that if they pretend they care, it is because they want to maximize the profit, and that if they comply with the law it is beause it would cost more not to obey the law, the author takes for granted that all decisions made by corporations are based solely on cost-benefit analysis not on ethical or moral codes or guidelines. The author assumes that corporations eventhought they are made up of individuals with ethical codes they do not use them in making decisions regarding profit. Therefore the author is asking why they make such decisions, why they only consider profits that can be made in near future but do not consider their future existance. The author asks how corporations make such decisions that in long run will destroy human beings, environment and corporations themselves. Joel Bakan is asking why people as a corporation harm other people and themselves. As an example, the author gives Monks story. (Monk is one of Americas most important and influential businessmen, he worries about what is going on in modern corporations. ) Monk was staying in a motel in a small town. He was shocked when he discovered that paper mill is polluting the river in that town. Monks says that he knew everyone there, the mayor, the mill employees and owners, and he also knew that no one wanted the river to be polluted and yet it was being polluted every night. (pg71) Therefore, why if no one wanted it to be polluted they were still polluting it? The question is why corporations make such decisions that harm other human beings. If there is no person in a given corporation who would want to harm others, why as a corporation they not only harm people but even kill them. What is the difference between murdering someone by using a firearm or a knife and murdering someone by letting him drive unsafe vehicle or drink polluted water or eat poisoned food. Who assigns the difference and who lets those murders happen everyday around the world. The question is why corporations are not prevented from doing harm, and why they decide to harm others in the first place. To back up the issues raised in The corporation Joel Bakan uses a lot of data, information, and facts regarding corporations and the legal breaches that they did. Two most important informations include data used by GM in calculation of cost-benefit analysis of improving products safety; and General Electrics major legal breaches including many contaminations of the environment and the amount that they had to pay between 1990 and 2001 for those legal breaches. GM in deciding whether to improve cars safety calculated how much it would cost them. Therefore they calculated how many accidents would happen on US highways, how many fatalities it would cause, and how much it would cost the company in lawsuits and other expenditures, mainly meaning the cost of a fatality. The calculation was as follows: 500fatalities x 200,000 per fatality / 41,000,000 = $2. 4 per automobile. To make the car safer, it would cost company $8. 59 per car. Therefore, it was cheaper not to improve vehicles because GM would save $6. 19 per car in production. Armstrong and her children, that had second- and third degree burns resulting from a rear-end accident in 1993 due to the fire caused by unsafe positioning of the gas tank in GM Malibu, were awarded $1. 2 billion. (pg63) Two significant orders for GE to pay was i 2 billion for asbestos cleanup and related pollution, and $95 million in damages for contamination from dumping of industrial chemicals. (pg75-78) The total GE had to pay for contamination of the environment alone, between 1990 and 2001 was approximatelly $3 000 106 million (over $3 billion); total for violations of safety rules at nuclear fuel plant, for design flow in nuclear plants, for illegal sal of fighter jets, and for overcharging on defense contracts was $300 million. GE was also ordered 14 times to clean up contamination of drinking water (ground water, river, water supply) and soil. The assumptin is that General Electric makes huge amounts of profit, because GE is able to exist on the market even though it was ordered to pay over $3 billion puls the cost of cleaning up contamination. The broader assumption, based on GE example, is that corporations make huge amounts of profit at the cost of environment and human lives and they continue to do so even though they are ordered to pay millions or billions of dollars in fines. Given the information regarding corporations actions and the impact they have on developing countries, on societies, on environment we all live in, and on individuals, who should care the most and why should we care at all. Joel Bakan is trying to make the reader think about the reality we live in, about what is really going on in the world, about bigger picture than only ones family, job, or friends. I think that in Joel Bakans opinion everyone should care about what he says, everyone should care aout future generations, and future of this planet, therefore everyone should take an action in order to make this world a better place. If we take his line of reasoning and accept his arguments it would mean that we should stand against the big corporations and their exploitation of people and environment. We should not agree with their actions and should do something to stop those big corporations destroying the world. We as people and customers have lots of power, however we are lazy to use our collective power to stop those corporations in their harming actions, instead we prefer to pay less for products eventhough we know that those products were made by child labouer. If we agree with Bakans arguments it means that we say no to corporations and to their exloitation of people and environment not to business in itslef, we do not stand against the business but against those corporations that are overtaking the world.

african hair styles :: essays research papers

African hair sculpture is what they call it and Africa and to them it is an art. Africans hardly ever leave their hair or their body plain or in the book, it says â€Å"natural† state. It says that they spend a lot of time and energy on grooming and self-admiration. Sounds like it’s the same way there as it is here because I love to â€Å"groom.† Ha ha. Anyway, it says they spend a lot of time on their hair and looks but special attention to their hair. The â€Å"art† of hairdressing was practiced mostly for women and male hairdressers can hardly be found. The book says that the skill of hairdressing has been handed down from generation to generation and requires artistry, manual dexterity, and patience because many of their styles are elaborate and time-consuming. For most African women hair is a medium for creative self-expression. Now their hair is styled for many different reasons. In some parts of Africa, hairstyles help to determine age, in others ceremonial occasions are marked by special styles. The design and construction of hair depends on different factors, some hair styles may need sisal, clay, the bark of trees, or cloth pads; in other cases it could involve intricate knitting, braiding, and threading of the hair. The most complex styles can take up to several hours and sometimes even days. That’s true here also and we got it from them. The slave master’s wife’s would watch the women braid the kids and each other’s hair and would want their hair to be the same as theirs because the styles were so beautiful. Anyway, they found that you could find complex styles only in the interior of the continent where people still live "primitive" and they have time for all that stuff. In urban areas, the styles are simpler where they have adopted western styles. OK, if you draw a line running from Dakar, Senegal in the west and to Khartoum, Sudan in the east you will see that to the north of the line live the light-skinned, straight-haired Hamites and Semites of North Africa. These would have been the so called â€Å"house slaves† or could even be passed of as being white in some cases. Around the dividing line, the people would have been brown-skinned and would have had curly hair because of Semite or Hamite intermixtures. They were in the middle of everything, they were not house slaves and not in the field just there, but doing work nonetheless. african hair styles :: essays research papers African hair sculpture is what they call it and Africa and to them it is an art. Africans hardly ever leave their hair or their body plain or in the book, it says â€Å"natural† state. It says that they spend a lot of time and energy on grooming and self-admiration. Sounds like it’s the same way there as it is here because I love to â€Å"groom.† Ha ha. Anyway, it says they spend a lot of time on their hair and looks but special attention to their hair. The â€Å"art† of hairdressing was practiced mostly for women and male hairdressers can hardly be found. The book says that the skill of hairdressing has been handed down from generation to generation and requires artistry, manual dexterity, and patience because many of their styles are elaborate and time-consuming. For most African women hair is a medium for creative self-expression. Now their hair is styled for many different reasons. In some parts of Africa, hairstyles help to determine age, in others ceremonial occasions are marked by special styles. The design and construction of hair depends on different factors, some hair styles may need sisal, clay, the bark of trees, or cloth pads; in other cases it could involve intricate knitting, braiding, and threading of the hair. The most complex styles can take up to several hours and sometimes even days. That’s true here also and we got it from them. The slave master’s wife’s would watch the women braid the kids and each other’s hair and would want their hair to be the same as theirs because the styles were so beautiful. Anyway, they found that you could find complex styles only in the interior of the continent where people still live "primitive" and they have time for all that stuff. In urban areas, the styles are simpler where they have adopted western styles. OK, if you draw a line running from Dakar, Senegal in the west and to Khartoum, Sudan in the east you will see that to the north of the line live the light-skinned, straight-haired Hamites and Semites of North Africa. These would have been the so called â€Å"house slaves† or could even be passed of as being white in some cases. Around the dividing line, the people would have been brown-skinned and would have had curly hair because of Semite or Hamite intermixtures. They were in the middle of everything, they were not house slaves and not in the field just there, but doing work nonetheless.

Completion Of Manufacturing Process Engineering Essay

Crunching is used for remotion of metal at completing procedure after completion of fabrication procedure. This is much faster than any other border tools which are used for border remotion. And besides crunching has greater velocity, truth and surface coating ( www.brighthub.com ) .Crunching Procedure:In this grinding procedure we will utilize a grinding wheel to taking stuff by cutting action of the infinite difficult and crisp scratchy atoms. It is really of import that we choose the correct crunching wheel for the exact type of cutting required. This crunching wheel consists of several scratchy atoms which act as minute film editing borders, and these atoms are bonded with the aid of adhering stuff. Crunching uses a method of stuff remotion called scratch ; it is must harder than the stuff being about. Besides the scratchy demands to be able to defy high temperatures caused by the clash during the grinding. Sometimes, these high temperatures will do harm to the bonding agents fou nd in the wheel doing the wheel to interrupt down. A ( www.surface-grinder.net, www.brighthub.com,2010 )Crunching types:Cylindrical bomber Surface bomber Tool and cutter bomber Belt bomber Bench bomber Jig bomber Gear bomberSurface grinding:Surface grinding is a fabrication procedure which moves or crunching wheel relative a surface in plane while a crunching wheel contacts the surface and removes a minute sum of stuff such that a level surface is created. In Surface grinding there are some methods include horizontal-spindle, vertical-spindle, perpendicular spindle rotary grinding, horizontal-spindle individual disc and perpendicular swivel caput grinding. For the surface crunching we need these parts for: To sharpening of cutting tool Produce a level surface Required a smooth surface raggedness Accurate tolerance thickness ( hypertext transfer protocol: //www.spindlesworld.com/grinding-process.html,2010 ) hypertext transfer protocol: //www.engineersedge.com/manufacturing/images/grind1.gif Horizontal – spindle reciprocating table surface grinding ( www.engineersedge.com ) hypertext transfer protocol: //www.engineersedge.com/manufacturing/images/grind4.gif Vertical – spindle reciprocating table surface grinding ( www.engineersedge.com )Centreless Grinding:In this centred crunching the grinding is performed at the Centre. This is besides called cylindrical grinding. These centred grindings are two types ; those are outside Diameter ( OD ) grinding and indoors diameter ( ID ) crunching. In Outside Diameter crunching the work piece has centre drilled terminals, suiting Centre points and surface is removed by revolving the bomber ‘s face home base with traveling the crunching wheel or revolving in clockwise waies. ( hypertext transfer protocol: //www.spindlesworld.com/grinding-process.html ) hypertext transfer protocol: //upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Centerless_grinding_schematic.svg/220px-Centerless_grinding_schematic.svg.png A schematic of the Centre less grinding procedure ( en.wikipedia.org )Tool and Cutter bomber:To sharpen milling cutters and tool spots this tool and cutter tool is used, along with a host of other film editing tools. hypertext transfer protocol: //upload.wikimedia.org/wikipedia/commons/thumb/3/38/ToolandCutterGrinder-table-head.jpg/220px-ToolandCutterGrinder-table-head.jpg Vie of a typical setuponaT & A ; Cgrinder ( hypertext transfer protocol: //en.wikipedia.org/wiki/Tool_and_cutter_grinder ) .Crunching wheel:AA crunching wheelA is an expendable wheel that is composed of anA abrasiveA compound used for assorted grindingA andA scratchy machining operations. They are used inA crunching machines. Wheel removes much smaller french friess of metal. The sedimentation of such bantam french friess, called swarf, occurs because theA grindingA wheel is composed of 1000s of cutting borders. TwoA typesA of scratchy stuff are used in theA grindingA wheel ; Aluminium oxide and Silicon oxide.A AluminiumA oxide is used when machining stuffs with a high ductileness, or ability to deform for good. Silicon oxide is used for stuffs with a low ductileness. The scratchy grains in aA grindingA wheel allow for a smooth finished merchandise, irrespective of the stuff being worked on. These scratchy atoms are normally coated with a diamond dressing. TheA surfaceA bomber is normally used as a finishing operation. ( http: //www.wisegeek.com/what-is-a-surface-grinder.htm,2010 ) hypertext transfer protocol: //upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Slijpsteen.jpg/220px-Slijpsteen.jpg Crunching wheel ( en.wikipedia.org ) There are five features of a cutting wheel: stuff, grain size, wheel class, grain spacing and bond type.Material:They will be Material, the existent abradant, is selected harmonizing to the hardness of the stuff being cut. Aluminium Oxide ( A ) Silicon Carbide ( C ) Diamond ( D, MD, SD ) Cubic Boron Nitride ( B )Wheel bond:Wheel holds the abradants, affects finish, coolant, and minimum/maximum wheel velocity. Vitrified ( V ) Resinoid ( R ) Silicate ( S ) Shellac ( E ) Rubber ( R ) Oxychloride ( O ) Wheel types: Straight wheel Cylinder ( or ) Wheel pealing Tapered wheel Straight cup Dish Cup Saucer wheel Diamond wheel Diamond spindles Cut off wheelsDiamond wheel:Crunching is the most popular method used to machine difficult stuffs utilizing diamond grinding wheels. The status of the grits on the fringe of a grinding wheel has a major cheek on the harm induced in a land specimen. Therefore truing and dressing must be carried out often ( Amin et al, 2000 ) .Dressing:The wheel must be dressed each clip it is placed on the machine, even though it may non hold been removed from the wheel Centre. Mount the wheel chest of drawers on the bomber tabular array. Bring the revolving grinding wheel up near to the diamond and get down the coolant flow. Never frock without coolant. Frictional heat build-up can do the diamond to come loose or separate from its saddle horse. Lack of lubricating belongingss, along with chilling, needlessly abrades the diamond.Face DressingWe need to convey the diamond contact with the Centre of the wheel, fed in a upper limit of.002 † , and so traversed each way off the border of the wheel. L earning the best crossbeam rate for dressing the wheel is a affair of test and mistake for each operator. We have to be fast adequate to forestall glazing, but slow plenty to minimise coiling lead Markss. Dressing from the Centre of the wheel out to each border helps minimise the consequence of the coiling lead Markss on the coating of the work piece. Do non take over.002 † per base on balls. Excessive in-feed will do the wheel to move like it ‘s loaded. This consequences from wheel stuff being â€Å" pasted † into new exposed wheel porousness. The type of frock applied to the crunching wheel may be changed to accommodate different crunching demands. A rapid crossbeam will take big sums of stuff rapidly. A slower crossbeam will bring forth a more desirable coating, but do n't take stuff as quickly. Face Dressing a Crankshaft Grinding WheelFace Dressing ( www.goodson.com )Side DressingWhenever the sides of a grinding wheel are found to run out, they should be dressed. With the chest of drawers mounted to a tabular array, conveying the diamond into contact with the crunching wheel near its forepart corner, feed in a upper limit of.002 † . The wheel is so fed in and out until the necessary sum has been dressed from each side of the wheel. Side Dressing a Crankshaft Grinding WheelSide Dressing ( www.goodson.com )Radius DressingPosition the diamond in the holder confronting out the forepart. Skid the holder back, place and lock the radius adjustor at the coveted dimension. Then skid the diamond holder frontward until the diamond contacts the radius accommodation halt. Tighten the diamond holder, unlock and abjure the accommodation halt. Feed the wheel into place to the full frontward. Using all right provender, conveying the diamond into contact with the front face of the wheel and dress the full breadth. Then back the wheel off from the diamond.004 † , loosen the swivel lock and take one of the halt pins so the upper swivel can be rotated 90A ° of travel. While swiveling the diamond through its 90A ° discharge, conveying the wheel into contact and frock of the needed sum from one corner. Repeat this procedure for the opposite corner by replacing the first halt pin and taking the 2nd pin to supply 90A ° rota ry motion in the opposite way. Be certain to maintain your diamond chest of drawers tools crisp. Revolve the diamond 30 to 45A ° after each dressing operation. Radius Dressing a Crankshaft Grinding WheelRadius Dressing ( www.goodson.com )( hypertext transfer protocol: //www.goodson.com/technical_support/tech_library/dressig_crankshaft_wheels.php,2010 ) Coolant: Coolants play an of import function in machining. One of the chief maps of coolants is to lubricate. This is achieved by decrease of the clash that develops in the contact zones between tool and work piece every bit good as between tool and bit. Heat dissipation, i.e. chilling of the work piece, and rinsing french friess off from the contact zone are farther of import maps of the coolant. The combined lubrication and chilling consequence reduces tool wear and enhances surface quality and dimensional truth of the work piece ( Brinksmeier et al, 1999 ) .Oil-based coolants:High force per unit areas and temperatures during machining procedures are necessary to make separation movies between the solid surfaces of the tool and work piece. The undermentioned BASIC oils are common: Mineral oil: natural C-H bonds must be free of harmful aromatic compounds by refinement. Hydrocrack oils: Partially man-made, low content of aromatic compounds, improved mineral oil Polyalphaolefines: Fully man-made oil with bifurcate hydrocarbons, thermally stable Man-made ester: Fully man-made oil of fatty ester acids, thermally stable, biologically analyzable, functional as basic oil and as linear.Water-based coolants:For high chilling efficiency and rinsing off capablenesss, water-based emulsions or solutions are employed. Water-based solutions consist of inorganic and/or organic substances and H2O and really rarely contain mineral oils. The H2O and oil stages must be separated before disposal. High chemical stableness and transparence are farther advantages in high chilling efficiency and rinsing off capableness. Water-based emulsion dressed ores contain 20-70 % basic oil. For metal crunching operations, oil-in-water emulsions are common ; the sum of oil determines the lubrication ability of the emulsion. Water based coolants contain up to 20 constituents in which ; each of the constituents can themselves be multi component mixtures. In grinding, the bit is formed, as stuff is deformed by the grit or grain film editing border and displaced sideways or frontward harmonizing to the orientation of the film editing border. Common oil concentrations in emulsions for crunching operations are between 2 and 15 % . Their chief disadvantage is susceptibility to leakage oils and micro beings doing high care costs ineluctable. ( Brinksmeier,1991 ) . Boundary lubrication is the manner of lubrication which depends on the lubricator movie bed physically adsorbed to the contact or the chemical bed formed on the contact. Boundary lubrication is two types, physical adsorbed layer boundary lubrication and chemical boundary bed lubrication. Beg linger and Gee de [ 1935 ] and Tabor [ 1981 ] by experimentation showed that practically in an elastohydrodynamic contact the lubrication and contact governments are rather assorted due to the contact surface raggedness and the local terrible EHL movie thinning even when the planetary EHL movie thickness is comparatively high. They showed that in a practical EHL contact both the physical adsorbed bed boundary lubrication and the chemical boundary bed lubrication frequently severally locally occur in different countries of the contact and these two lubrications both play of import functions in the public presentation of an EHL contact. These two lubrications really determine the failure of an EHL contact. Zhang [ 2005 ] theoretically showed that even in an ideally smooth EHL contact in isothermal pure turn overing status physical adsorbed layer boundary lubrication occurs in portion of the Hertz a contact zone when the turn overing velocity is lower than a critical value or the bu rden is higher than a critical value Lubrication jobs in infinite include: aˆ? Very low ambient force per unit area ; aˆ? Presence of atomic species other than the usually encountered molecular species ; aˆ? Radiation environment ; aˆ? Absence of a gravitative field. The low-pressure environment contributes to rapid Vaporization of the liquid or semi-solid lubricating oil lubricators usually employed. Since lubrication normally takes topographic point by agencies of a movie entrained between skiding or turn overing surfaces, the loss of this movie due to vaporization and mechanical working can ensue in failure of the mechanism. The lubrication map is, with many metals, strongly influenced by the presence or absence of oxide movies on these metals. The surface oxides often act as protective movies and, in some instances, contribute to the concluding surface movies through either chemical reaction or chemosorption ‘s ( Zaretsky1990 ) . The film editing fluids are chiefly used in metal remotion processes due to their consequence on conveying generated heat in the contact zone, decrease of clash in the tool-work piece contact zone and bit transit from the cutting country. On the other manus cutting fluids have serious disadvantages, such as wellness jeopardies and the explosiveness of oil vapor, environmental pollution, wear of the elements of the machine tool and increasing fabrication cost. In order to diminish the negative environmental impact of the film editing fluids and cut downing fabrication costs, new machining techniques such as dry machining are used ( Klocke at el 1997 ) .MQL:During crunching, many scratchy grits are in contact with the work piece at each 2nd, but merely a little part of these grits have the cutting function in the existent procedure and the others do non execute existent film editing, but alternatively bring forth heat by rubbing and plowing the work piece surface in the contact zone. H igh heat coevals and temperature in the contact zone are associated with a high negative profligate angle and a great contact length in crunching procedure. Crunching operation, without utilizing sufficient coolant-lubricant, leads to thermal amendss and dimensional inaccuracy on the work piece surface. Hence methods of dry crunching have non yet been to the full successful in industrial applications. An attractive option for the dry grinding procedure is the minimal measure lubrication ( MQL ) grinding. This procedure uses a minimal measure of lubrication and is referred to as close dry grinding. In MQL grinding, an air-oil mixture called an aerosol is fed onto the machining zone. Tawakoli et al 2010investigated the effects of the work piece material hardness and crunching parametric quantities on the MQL grinding procedure. Based on the consequences of their probes, important betterment can be achieved by MQL grinding of hardened steel in comparing to dry crunching procedure. One attractive option for dry and unstable grinding procedures is MQL crunching. This procedure uses a minimal measure of lubrication and is referred to as close dry grinding. In this procedure aerosols are oil droplets dispersed in a jet of air, oil droplets carried by the air fly straight to the tool working zone, supplying the needed chilling and lubricating actions. Tawakoli et al 2010 investigated the effects of the work piece material hardness and crunching parametric quantities on the MQL grinding procedure. Based on the consequences of their probes, important betterment can be achieved by MQL grinding of hardened steel in comparing to dry crunching procedure. In MQL film editing, a little sum of biodegradable oil, which is assorted with tight air to organize oil mist, is applied to the cutting point alternatively of the inundation supply of H2O mixable or water-immiscible film editing fluids. Many successful consequences have been reported on tool wear decrease in terminal milling, boring, and turning. MQL cutting can cut down non merely the cost associated with the disposal of waste oils but besides the energy ingestion related to the cutting unstable supply systems, while it may demo some troubles in chilling tool and work, transporting french friess off from cutting points, etc. Unlike wet film editing, in which the film editing point and its environing countries are certainly cooled, MQL is non ever effectual to any type of cutting. MQL does non work so good in cutting difficult-to-machine stuffs with high strengths, low thermic conductions, and high affinities with tool. Some researches applied MQL on heavy cutting with big deepnesss of cut and provender rates, and high-velocity film editing with high rates of heat coevals. Therefore, high-velocity MQL rifling was carried out utilizing a coated, cemented carbide tool to clear up the consequence of MQL on cutting public presentation in high-velocity film editing. [ Toshiyuki Obikawa et Al, 2006 ] . Crunching kineticss: Chatter is a violent quiver of the tool, negatively affects machining of metals. The most of import belongings of yak is that it is a self-excited quiver, which is closely related to the dynamic behavior of the film editing forces and the machinery construction. This is an unwanted status because it adversely affects the surface finish quality, machining truth, tool life and spindle bearing life. Chatter is responsible for cut downing production end product, because if no solution can be found, metal remotion rates have to be lowered until vibration-free public presentation is obtained. And besides yak is so inconsistent in character that the inclination of a machine to exhibit yak is frequently non realized during the development phase ( Taskesen and Ercan 2003 ) . The grinding machine spindle is one such system where quiver causes major jobs in the grinding procedure as the crunching wheel deepness of cut is so little that even the slightest amplitude of quiver can hold dramatically detrimental effects on surface coating, wheel wear, and form-holding. Crunching machine quiver are two types, forced quiver and self-excited ( yak ) quiver. Forced quivers are caused by periodic perturbation external to the grinding procedure ; Chatter is so inconsistent in character that the inclination of a machine to exhibit yak is frequently non realized during the development phase ( Taskesen and Ercan 2003, Malkin1984 ) . The grinding machine spindle is one such system where quiver causes major jobs in the grinding procedure as the crunching wheel deepness of cut is so little that even the slightest amplitude of quiver can hold dramatically detrimental effects on surface coating, wheel wear, and form-holding. Crunching machine quivers are normally classified into two types: Forced quiver and Self-excited quiver. Forced quivers are caused by periodic perturbation external to the grinding procedure. Self-excited quivers are by and large associated with natural quiver manners of the machine-tool construction. A numerical algorithm based on five grades of freedom theoretical account was presented to imitate the dynamic response of the spindle of a grinding machine ( Alfares and Elsharkawy, 2000 ) . Crunching energy: The ‘grit size consequence ‘ for specific energy in crunching of Si nitride by is wickedness bonded diamond wheel. An addition in specific crunching energy at smaller deepnesss of cut was related to an addition in specific ploughing energy at larger semi-included angles. By comparing the dimensionless specific crunching energy to the modified dimensionless specific ploughing energy, a general grit cross-sectional cutting profile was obtained holding a rounded tip at its terminal. The deliberate grit profile was characterized in footings of an mean tip radius and asymptotic semi-included angle ( Hwang et al1999 ) . Specific energy by and large includes energies consumed in bit formation, ploughing, sliding, and elastic distortion of work piece. Specific energy in grinding is approximately an order of magnitude higher than in turning or milling. The higher specific energy in crunching is chiefly due to more specific surfaces produced in french friess, every bit good as more material distortions ( both plastic and elastic ) . On the other manus, under the same grinding conditions, specific energy besides depends on the belongingss of the work piece stuff, particularly physical-mechanical belongingss. Specific energy in crunching can be mathematically modelled and used to foretell crunching procedures ( Tonshoff, 1992 and Malkin et Al, 1996 ) . The theoretical account anticipation is good verified by the grinding experiment and is proven to be feasible. _the grain size of the WC samples has an obvious consequence on specific energy in grinding and surface topography of the land WC samples. _ Under a given grinding status, the WC samples with a smaller norm grain size consequence in lower specific energy, and frailty versa. _ Plastic distortion occurs during crunching of the WC samples. It is chiefly due to the soft Co stage which is found to be †squeezed out † due to abrasive-work piece interactions. The †squeezing out † causes the Co stage to smear over the land work piece surface, Forming ridges and/or pile-ups along the grinding abrasions ( Ren et al,2009 ) . Crunching force: Durgumahanti et Al. in 2010 developed a crunching force theoretical account by integrating the effects of variable coefficient of clash and plowing force.This crunching procedure consists of three phases: plowing, cutting and rubbing. These constituents were used in the footings of the experimental coefficients and procedure parametric quantities like wheel velocity, table provender and deepness of cuts. By executing crunching trials at specified conditions, they determined the practical coefficient. The fluctuation of the clash coefficient with procedure parametric quantities such as wheel velocity and work provender has been taken into consideration while ciphering the frictional force constituents. The plowing force constituents were modelled by executing single-grit trials. The entire grinding force theoretical account is developed by integrating the combined effects of variable coefficient of clash and the plowing force. This theoretical account clearly explains the importance o f the plowing force, which becomes more prevailing at really low deepness of cuts. The coefficient of clash in the present theoretical account varies with procedure parametric quantities like wheel velocity and table provender, unlike the old theoretical accounts, where it is a changeless value throughout the procedure. Earlier strategies of executing of these trials were either by utilizing by utilizing an aluminum phonograph record that was mounted on to a grinding machine. It can be observed that the present strategy of put to deathing the single-grit trials can take attention of these restrictions. Hence, the new crunching force theoretical account can be faithfully used to foretell the grinding forces and supply a certain theoretical footing for research on crunching force. A new surface crunching force theoretical account is proposed. The influences of crunching treating parametric quantities to dynamic mechanics belongings of metal stuff film editing and clash coefficient between work piece and crunching wheel have been taken into history. The consequences of simulation and computation are co-occuring good with the experimental measuring. This proves the rightness and effectivity of proposed crunching force theoretical account. To definite crunching wheel and element stuff, merely four groups of experiments are needed for work outing a set of additive equations and can obtain the precise computation expression of crunching force under the same grinding wheel and element stuff conditions. Compared with the traditional theoretical account, this crunching force theoretical account avoids a big figure of experiments and saves the cost every bit good ( Tanga, 2009 ) . Vibration devices: This magneto-strain is quadratic and occurs ever in the same way whatever is the field way. In the applications of majority stuffs these enlargement strains are seldom used straight because a additive behavior is preferred. By using a mechanical pre-stress and a magnetic prejudice in the active stuff the one-dimensionality is obtained. Quasistatic actuators are utilizing GMA in these conditions for placement, quiver control, stepping motors and fluid control applications. Giant Magnetostrictive Materials ( GMMs ) are in competition with piezo ceramics, particularly MLAs but found their topographic point in specific applications such as low electromotive force actuators, big force actuators, high power low frequence transducers and infinite cryogenic placement. In other instances, MLA piezoceramic actuators are frequently more interesting because of their low power ingestion and high end product energy per mass unit ( Claeyssen et al 2002 ) . For the accurate dynamic modeling of a merely supported beam under a traveling mass, LIN 1997 claimed that the chosen of a traveling mass should be accounted for carefully in the dynamic preparation since the mass is traveling along a vibrating way. Abdel-Rohman and Leipholz 1980 presented the active control of a merely supported beam under a traveling mass by utilizing flexing minute in footings of tenseness and compaction forces with a individual actuator. Kwon et Al. 1988 presented an attack to cut down the warp of a beam under a traveling burden by agencies of seting the parametric quantities of a conceptually 2nd order damped theoretical account attached to a flexible construction. Devasia et Al. 1993 presented the attacks to find the length and arrangement of piezoactuators in footings of the optimisation of muffling elite under collocated muffling control, additive quadratic cost functional in the initial status with the premise of detectability and stabilizability, and minima l characteristic root of a square matrix of controllability grammian. SUNG 2001 presented based on the Euler-Bernoulli beam theory by including the dynamic chosen of a traveling mass going along a deflecting way. Second, a multi-input-multi-output warp accountant is presented to actively cut down the structural warp under a traveling mass by utilizing piezoactuators. Last, a comparing between uncontrolled and controlled instances can be found in the numerical simulation. Using piezoactuators bonded to the beam, the accountant with full province feedback was designed to cut down the structural warp. In order to find the optimum arrangements of piezoactuators, the LQR-based preparation was employed. The micro pump consists of three actuated membranes and is capable of bidirectional operation. In those three membranes two active valves and one pump actuator. This characteristic is really utile in our application since it allows both pressurizing and depressurising the unreal sphincter. As below Fig. shows, a Li polymer battery supplies the energy to the system. A miniaturized electronic power accountant generates the high electromotive force necessary to drive the actuators of the micro pump. A reservoir is used to keep a sufficient sum of fluid to be pumped into a polymer-based turnup that represents the existent unreal sphincter prosthetic device. A force per unit area detector is besides included to supervise the force per unit area inside the turnup. All informations gathered and all operational bids can be sent via a telemetric unit to/from an external remote control unit. Fig. GASS system description Using charge recovery has resulted in up to 50 % decrease in electrical power ingestion while maintaining mechanical end product power well unchanged. The efficiency is hence improved. One drawback of this technique is the demand for physically large inductances in order to make the negative electromotive force required. Advanced drivers that are capable to retrieve portion of the charge stored in the actuators by agencies of high frequence exchanging convertors are being investigated by our group. This solution would work with much smaller inductances but, on the other manus, it would increase the complexness of the drive circuit ( Giovanni Biancuzzia 2009 ) . Piezoelectric stack actuators are employed in the theoretical account to accomplish quiver control of flexible constructions, and dynamic features are besides investigated. Mobility technique is used to deduce the regulating equations of the system. The power flow transmitted into the foundation is solved and considered as a cost map to accomplish optimum control of quiver isolation. Some numerical simulations revealed that the analytical theoretical account is effectual as piezoelectric stack actuators can accomplish significant quiver fading by choosing proper value of the input electromotive force. In active systems, the actuators are the cardinal parts. Piezoelectric stuffs can be easy bonded on or imbedded into conventional constructions, are lightweight and have comparatively high triping force and comparatively low power ingestion features, and so, are used most widely to command quiver and noise ( Crawley and Deluis 1987 ; Dimitriadis1991 ; Han et al. , 1997 ; Niuet al. , 200 4 ) . Active quiver control of a revolving flexible construction whose application includes a infinite roar, a chopper blade and a air current turbine is considered. In the rotating constructions, the fluctuation of quiver features due to the stiffening consequence of the centrifugal forces and the resonance job due to one of perturbation frequences of multiples of revolving velocity demand to be carefully considered for active quiver control. Schilhansil and Providence 1958 investigated the stiffening consequence of the centrifugal forces on the first manner flexing frequence of a revolving cantilever beam. A glass/epoxy composite beam is prepared and the piezoceramic actuator is patched at the root of the revolving hub. The fluctuations of the natural frequences are by experimentation investigated with regard to the revolving velocity. The critical perturbation frequence is determined by detecting the radius diagram, and the changeless amplitude accountant ( CAC ) is by experimentation r ealized. Vibration control responses subjected to two different perturbations ( rotational velocities ) are evaluated and presented in clip sphere. It has been demonstrated that the quiver of the beam caused by revolving the beam at resonance and non-resonance velocities can be well suppressed by using control electromotive force to the piezoactuator ( Choia and Hanb, 2004 ) . Shaker: The transducers convert the force transmitted to the construction and the response of the construction to electric signals which, one time filtered through signal conditioning equipment, are digitised and used to develop estimations of FRF in a spectrum or frequence analyser. Shaker-structure interaction is ever a concern in FRF measuring because it introduces the job of â€Å" force drop-out † at structural resonances. To the multi-shaker sine dwell trial, the stage difference of the input signals applied to the Shakerss, it is controlled in order to keep an perpendicularity belongings of shaker-applied forces. The features of some current FRF calculators are presented and it is shown that the instrumental FRF calculator, 3H ( Ta ) , is a noise-free calculator although still apt to bias mistakes. The escape job on auto- and cross-spectra emerges during the processing of finite record information and, as a consequence, it is hard to stipulate which FRF calculator will bring fo rth the ‘best ‘ estimation of a FRF ( To AND EWINS,1990 ) . The electro-dynamic shaker maps to present a force proportional to the current applied to its voice spiral. These devices are used in such diverse activities as merchandise rating, emphasis showing, squeak-and-rattle testing and average analysis. A surprising sum of information may be extracted from a shaker by utilizing it as a quiver detector, instead than as an exciter. In such an experiment, the electromotive force end product of the voice spiral is monitored while the shaker is caused to vibrate due to transient mechanical input. There are many types of machines designed to intentionally vibrate constructions. They are demoing little, lasting magnet, electrodynamics Shakerss. For this operation we need three stairss. Firstly, some inventiveness is required to bring forth the radial magnetic field moving in a plane normal to the spiral ‘s axis. Second, the spiral must be allowed to travel axially but be restrained from all other gestures. Third, the force provided by the ma chine is relative to the magnetic flux passing through the spiral, to the current flowing through the spiral and to the figure of coil-turns within the flux ( Lang, 1997 ) . We can better the control public presentation by adding an adaptative filter to the 2dof accountant utilizing m-synthesis in the feedback accountant. The uncertainness of the controlled works is taken into history and the adaptative filter based on the H1 filtering job is employed. A robust accountant utilizing an adaptative filter based on the H1 filtering job was used for an electrodynamics shaker control, and excitement experiments were performed to measure the control public presentation. It was assumed that the conventional open-loop method utilizing iterative compensation by insistent excitements could non be employed, and the proposed accountant was consequently designed for this status. Amore robust accountant was developed by adding the adaptative filter from the EBAF method to the 2dof accountant utilizing m-synthesis. ( Uchiyama at el 2009 ) . The construction of an electrodynamics shaker bears some resemblance to a common speaker unit but is more robust. At the bosom of the shaker is a spiral of wire, suspended in a fixed radial magnetic field. When a current is passed through this spiral, an axial force is produced in proportion to the current. The public presentation envelope of an electrodynamics shaker system is strongly influenced by three manners of quiver and the voltage/current capacities of the power amplifier that drives it. Other confining factors are the intentional shot of the traveling mass and the entire mass of the shaker, the thermic power bound of the spiral and the emphasis safety factor of the armature. Power analysis discloses the electrodynamics shaker to be a thermodynamically inefficient machine. As machine warhead is increased, efficiency lessenings while line power factor improves. The research lab thermic burden is about independent of trial point weight. Power analysis discloses that an stray s ystem can be designed to better mechanical bringing in the low frequence part. ( George Fox Lang and Dave Snyder 2001 ) . The controlled shaker has proven really cost effectual for more everyday merchandise making and seismal rating work. Modern DSP shaker accountants now do an outstanding occupation of reproducing coveted transient pulsations safely, faithfully and repetition competently. However, a shaker presents some physical barriers to floor proving. These devices have a limited scope of supplanting shot and exhibit speed bounds that can non be exceeded without loss of control. ( George Fox Lang 2003 ) . To the magnitude ordinance control, the amplitude of the sinusoidal acceleration is accurately controlled to be equal to the puting value. For a switching inverter-fed electrodynamics shaker system, in add-on to holding low deformation driven power, the decrease of unsought harmonic quiver caused by harmonic current and the imperfect shaker tabular array construction is besides really of import. Accurate acceleration control of an electrodynamics shaker fed by an inverter is really hard to accomplish, owing to tinstone-sinusoidal armature excitement power beginning ( Thin-Huo Chen at el 1999 ) . Terfenol -D: To cipher the opposite of a theoretical account for the hysteretic stuff Terfenol-D we used magnetostriction theoretical account, as portion of a full control constellation for Terfenol-D actuators. This opposite is based on a magnetostriction theoretical account that has been shown to qualify the behaviour of Terfenol-D good. Initially unbounded, roll uping mistakes in the opposite are analyzed and a method to jump the mistake for periodic input. The bimodal magnetostriction opposite is able to invert the strain behaviour of Terfenol-D to within a low, bounded mistake. The Terfenol-D theoretical account and opposite are for quasi-static applications and do non pattern temperature dependent behavior ( Ann Reimers and Edward Della Torre, 2000 ) . Calculation of the work done in the latter instance indicates an internal emphasis degree in the Terfenot-D of about 6.4 MPa. For AC operation sinusoidal extremum to top out currents of 28 As generate a Nett force of about 9 kN, over and above any applied prestress, which decreases by 10 % at frequences up to 400 Hz. Higher frequence constituents merely appear at really, high thrust degrees.Properties:Optimization of the Terfenol-D end product, commensurate with its eventual application and accomplish the greatest supplantings or forces. Minimization of the thrust current demands and thereby cut down losingss due to heating in the field spirals. Realization of the full end product power on the scope DC to 300 Hz. Production of motions of ~0.5 millimeter. Coevals of forces -10 kN. The design and operation of the appropriate power amplifiers. It is proposed that with farther development the actuator will run in concurrence with a hydraulic system and closed cringle control implemented to accomplish pre-selected actuator end product from the combined hydraulic and magnetostrictive forces ( Aston at el 1997 ) . Applications utilizing the elephantine magnetostrictive stuff TERFENOL-D are traveling into volume production as more design and application applied scientists realize the potency of the stuff. The execution of these procedures has increased the scope of available sizes and forms of TERFENOL-D, improved the magnetostrictive public presentation of larger diameter stuff ( & gt ; 25 random-access memory ) and increased the repeatability of magnetostrictive public presentation in the finished transducer elements. Giant magnetostrictive engineering continues to progress, with important work go oning in the transportation of the engineering from the research lab and into the commercial universe. New treating methods are demoing promise for the production of high volume, cost effectual transducer elements, by both directional hardening or pulverization metallurgy attacks. Work remains in the countries of procedure polish to accomplish tighter control of public presentation fluctuations and in stuffs word picture for the now available big diameter drivers ( Jonathan at el 1997 ) . TERFENOL-D is a close individual crystal metal metal, which converts electrical power to mechanical power, and frailty versa. TERFENOL-D is â€Å" magnetostrictive, † intending it changes form in a magnetic field. TERFENOL-D has a greater form alteration, or strain, than other common transducer stuffs, such as piezoceramics ornickel alloys. This means acousticdevices driven by TERFENOL-Dhave greater power, and actuators have more displacement and moreforce. Like other magnetostrictivealloys, TERFENOL-D does notchange with clip or figure of rhythms.What is Magnetostriction?Magnetostriction is the belongings that causes certain ferromagnetic stuffs to alter form in a magnetic field. TERFENOL-D is said to bring forth â€Å" elephantine † magnetostriction, strain greater than any other commercially available smart stuff. Magnetic spheres in the crystal rotate when a magnetic field is applied, supplying relative, positive and quotable enlargement in Microseconds.TERFENOL-D Property:aˆ? 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