Genetic Determinism Essay -- DNA Genetics Traits Essays Papers

Genetic Determinism On Christmas Day in the year 2001, I gave birth to a healthy baby boy. When I looked into the brand-new face of my son I saw a beautiful mystery. I wondered what kind of man my boy would grow to be and what his life would be like. There are those in the scientific community who would argue that my son's path was already determined at the moment of his birth, that his fate could be deciphered from his genetic make-up. As a nurturing mother I know better. At two years old my son has developed a more diverse vocabulary than many children twice or even three times his age. He recognizes many written words and reads them aloud. He is able to spell his name. He can distinguish a square from a rectangle and an octagon from a hexagon. Was he born with this knowledge? The answer is no. My son, as genetically gifted as he may be, could have been born into an environment in which his inborn potential was never developed. The knowledge he now possesses can be directly traced to the teaching envi ronment in which he has grown. Human beings are a product of both their biology and their environment. As a mother, I am shocked and dismayed by the general acceptance of the myth of genetic determinism. One's environment, including people one interacts with, has an undeniable influence on how one develops. Nonetheless, many scientists disregard the impact of environment on one's intelligence. I do not deny that one's biology is a crucial part of one's identity. Inheritance of physical traits is obvious. Children often look "just like" their father or mother, or another relative. One's genes determine eye and hair color, height and body build. I believe, however, that what makes us human is not something that can be found in... ...ork: Praeger Publishers, 1991. Knapp, Peter, Jane C. Kronick, R. William Marks, and Miriam G. Vosburgh. The Assault on Equality. Westport: Praeger Publishers, 1996. Loehlin, John C., Lindzey Gardner, and J.N. Spuhler. Race Differences in Intelligence. San Francisco: W.H. Freeman and Company, 1975. Melo-Martin, Immaculado de. "When is Biology Destiny? Biological Determinism and Social Responsibility." Philosophy of Science 70.15 (2003): 11. Expanded Academic Index. Infotrac. Mabee Library, Topeka. 20 April 2004 Nurcombe, Barry. Children of the Dispossessed. Honolulu: University Press of Hawaii, 1976. Samuda, Ronald. Psychological Testing of American Minorities: Issues and Consequences. New York: Harper and Row, 1975. Steen, R. Grant. DNA and Destiny: Nurture and Nature in Human Behavior. New York: Plenum Press, 1996.

Mrs Beast Essay

One construction of feminism in the poem is female dominance over men. The Beast is shown as the weaker of the male culture due to his unappealing image â€Å"ugly as sin†. The Beast sees the narrators seeming interest in him as a miracle and is portrayed as desperate to keep her attention even it means living with her neglect. Here we see that the there is a reversal of gender stereotype as the Beast takes on the supportive female role and the narrator takes on the stereotypically-dominant male role. The Beast is also described as submissive to the narrator, â€Å"fell to his knee’s at the door† which is stereotypically a female trait and shows the power Mrs Beast has over him. Traditionally men are known for being the most powerful in relationships as they are looked up to by women as the more protective, confident and in-control gender because are often known to be the sex that induces a relationship (asking to court/ asking for marriage). Another male trait shown by ‘Mrs Beast’ is the control she has over the Beast such as during sex, â€Å"The lady says Do this. Harder. The lady says Do that. Faster. The lady says That’s not where I meant. † The imperatives used show that Mrs Beast is the most dominant in their relationship which goes against gender stereotypes as men are traditional seen as the most powerful in a relationship. In the poem Mrs Beast shows that she controls when the couple have sex â€Å"The pig in my bed Was invited† which suggests that man has become a sexual object to Mrs Beast rather than a lover, as she shows no emotional attachment to him other than to use him to please her, which supports the feminist view of female dominance. Men are also known to be the most confident in sex and it’s usually the submissive woman that is known to conform to pleasuring the man rather than vice versa. Second construction of feminism in the poem is where the women take on masculine characteristics and traits. Peukert wrote that Carol Ann Duffy shows a â€Å"reverse of the traditional hierarchical gender constructions, where the female is now presented as a superior and dominating figure† in her poem. Many critics argue whether this reversal is seen as positive or negative as in some areas of her poem, the narrator seems to be losing her female traits and manifesting into the feminist viewpoint of a man. In the poem, Mrs Beast shows male characteristics such as where she uses contemporary taboo language when referring to ‘Princes’ as â€Å"bastards†. This is often a male trait because women are stereotypically known to be more well-spoken and polite than men. Another example of a male trait Mrs Beast portrays is when she boasts of her possessions and independence, â€Å"My own gold †¦ My own black horse†. This is often seen as a stereotypical male trait as men are considered my independent than women who often depend on men to provide for them and their family. Also, to boast about one’s possessions and power, shows competitiveness which is a common male characteristic also. Competiveness is also shown in the poker game between the â€Å"Serious ladies†, a game that is considered ‘a man’s game’. Traditionally, women playing poker/gambling was seen as improper because of its known bad influence to cause obsession which would be unacceptable as women were seen as pure/untouchable against all evil/illegal things such as drinking or smoking. Duffy’s use of the semantic field of the poker game, â€Å"bluff†, â€Å"Aces† and â€Å"shuffle and deal† the women are now in roles of control which is a typical masculine trait. (The game could also show that the relationships are like a game. ) Gender role reversal is also shown in the way the Beast is described. When the Beast meets the narrator at the beginning, he is said to show â€Å"tears in his bloodshot eyes, That he knew he was blessed†. Showing emotion is not usually associated with men as the female gender are often stereotypically portrayed as the more emotionally gender and for men to show emotion is seen as a humiliating weakness. An earlier example of this would be in Stokers novel, Dracula, when Holmwood breaks down in front of Mina, which many Victorian male readers would find shameful and weak. This could support Antony Rowland’s view that â€Å"men and masculinity are attacked constantly by more abrasive female narrators† throughout Duffys poems in ‘The Worlds Wife’. In the poem, Duffy exposes men for the ‘†bastards† that they are and mocks them in comparison to the ‘Beast’, â€Å"The sex is better†, â€Å"his erection ,Size of a mules – best†. Here Duffy teases the men (‘Princes’) by comparing physical manhood which is stereotypically known as a ‘mans pride of pleasure’. Another construction of feminism is the discriminating or degrading of the male gender. The Beast in the poem is often compared to a â€Å"mongrel† and â€Å"a dog† all animals which are known for evolving from â€Å"wolfs† to household pets. This suggests that the Beast is mere property to Mrs Beast and perhaps at both times a comfort and a burden to have to keep, which links to the feminist theme that men are sexual objects and nothing more. Dogs are known to have short-life span and are often replaced by another which again could be considered a stereotypically a masculine view, that women can be replaced after they’ve outdid their usage, as there are ‘plenty more fish in the sea’. Other animals the Beast is compared to is a â€Å"mule†, â€Å"donkey† and â€Å"horse† which are all animals that humans use for transport. We could suggest that this could be a sexual reference as Mrs Beast ‘rides’ the Beast and is control during sex, as a rider is in control of a horse. There is also a phrase in the poem where animals mentioned seem to drop down in evolution, â€Å"An ape, a wolf †¦ dragon, dinosaur. † Humans are believed to have evolved from apes, so to describe the Beast as a ape and then a dinosaur could suggest that Carol Ann Duffy is implying that men are perhaps less evolved than women and that in the presence of a woman (Mrs Beast) men lose their humanity/ intelligence. Another construction of feminism in the poem is the theme of homosexuality. At the end of the poker, the â€Å"drop-dead gorgeous Bride of the Bearded Lesbian didn’t Bluff† and ends up winning the game. Some critics believe that Duffy is intentionally putting out her support for homosexuality by letting the ‘Lesbian’ be the winner of the poker game. This could also be a biased consideration of the stereotypical viewpoint that most feminist are homosexual for example Duffy herself has been rumoured to have had a relationship with (Not sure how to develop ) Duffy lists, throughout the poem, various women both from history, â€Å"Marilyn Monroe†, â€Å"Bluebeard’s wives, Henry VIII’s†, â€Å"Diana, Princess of Wales† and from fairytales, â€Å"Little Mermaid†, â€Å"Rapunzel†, â€Å"Ashputtel†. Here Mrs Beast and her acquaintances pay tribute to these women, of whom Duffy suggests, were mistreated by their â€Å"Prince† such as â€Å"Diana†. Her marriage to Prince Charles was frowned on by the Royal family and eventually came to an end when he husband was rumoured to have had an affair behind her back. From this reference, Duffy is implying that even the most presumed perfect man on the outside (Prince Charles both a member of the Royal family and a Catholic) can still be a â€Å"bastard† inside. The reference to â€Å"Bluebeard’s wives† also shows the false image, shown by men who seem perfect. In the fairytale Bluebeard marries again, after a numerous times before, to a beautiful woman who in the ends find out that Bluebeards has killed his previous wife’s and hung them up in a room, she informs others and has him killed. Duffy refers to this fairytale because it negatively implies that men are destroyers of women and only seek to harm/manipulate them like Bluebeard who kills his wife’s and strings them up like trophies/ prizes of his conquests. A additional reference to another â€Å"tragic girl† is â€Å"the tears of Mary† where Duffy personifies the beads of the rosary as the Virgin Mary’s tears. Here Duffy makes a controversial example of the suffering of Mary, whose vital suffering is considered insignificant in comparison to the suffering of Jesus on the cross. Although this is could be a exceptional argument supporting feminist we must consider the context because the discrimination is purely down to the culture during the time period the Bible was wrote; women were seen as the ‘weaker sex’.

Vehicle of Social Expression

Music is the most powerful vehicle of human expression. As the embodiment of love, disapproval, happiness, experience – life, music speaks to us, because it comes from us. Each people, in each paradine of the human experience instinctively and systematically change the music of the past to represent the realities of the present. In this century, black music, more specifically Soul music, has been that music that has brought to plain view that which evidences our humanity – hope, hurt, joy and passion – in such a way that the world has no other choice than to feel its power and marvel in its brilliance. When one discusses the relationship between Soul music and the civil rights movement, it becomes a dialouge very akin to that of the chicken and the egg. The period of â€Å"Classic Soul† is that period primarily, but not exclusively referenced as the 1950†³s, 60†³s and 70†³s (Stephenson 186). This is the time frame of the American Civil Rights Movement, and the impact of the massive changes going on, are reflected in the music and the culture. So one would be correct in both assuming that the Civil Rights Movement gave rise to Soul music, as much Soul music contributed to the success of the campaign for civil rights. Soul music during its heyday, did more than simply entertain. For a race of people it served as a source of motivation, strength and education, for a people immersed in turmoil and tragedy. The institution of segregation had effectively inhibited the general populace†s awareness of the great achievements and contributions made by African-americans throughout the history of the United States (Franklin 429). Inasmuch, Soul music sought to bring that undersight to light. Soul songs like Donny Hathaway†s â€Å"To Be Young, Gifted and Black,† was revolutionary, in that they sought to instill pride of one†s history, but at the same time motivate a new generation to reach new heights. As Hathaway says, â€Å"We must begin to tell our young, ‘Don†t you know that there is a whole world waiting for you? â€Å"†, he is calling for the teaching of black pride to the youth, which was a wide spread trend in black communities of the '60s and '70s (Hathaway). James Brown†s â€Å"Say It Loud, I†m Black and I†m Proud,† became an anthem for the movement (Brown). The song†s lyrics like, â€Å"†¦. Don†t quit moving, until we get what we deserve†¦ we†d rather die on our feet, than keep living on our knees,† were words of inspiration for those involved in the struggle for equality. â€Å"Whereas the predominant theme of rhythm and blues was love and other kind of human relationships, soul singers voiced concern about the social injustice, racial pride, black militancy, and forms of protest (Southern 517). Eileen Southern†s statement on Soul music greatly describes the type of works produced by Hathaway and Brown at the time, yet was definetly not exclusive to these two artists. The period wherein Soul intertwined with the Civil Rights Movement, produced music greatly influenced by the environment in which its creators lived. Donny Hathaway†s, â€Å"Ghetto,† and Marvin Gaye†s â€Å"Inner City Blues (Makes Me Wanna Holler),† speak of the harshness of life in the Inner City (Hathaway/Gaye). Societal ills and political unrest were a major theme of Soul music, and Marvin Gaye†s work, almost more than any other artist, was demonstrative of this fact. Gaye†s album What†s Goin On, was his commentary on the social problems of the period, and through its success tremendously impacted the increasing social awareness. Despair within the black community was given voice in Gaye†s â€Å"Inner City Blues†. Inflation, taxes, unemployment and police brutality were numbered among the themes addressed in the song. The sense of hopelesness of the piece can best be conveyed in the line saying, â€Å"this life ain†t worth the living†¦. makes me wanna holler, throw up both my hands! â€Å"(Gaye). â€Å"Save the Children† goes on to ask: â€Å"Who is willing to try and save a world that is destined to die? â€Å", yet goes on to say â€Å"live life for the children†¦ let†s save the children (Gaye). So, even in the midst of great despair, Gaye, and other artist of his genre, did believe in the possibility of change. â€Å"Ball of Confusion,† debuting in 1970, gave the Temptation's take on the societal ills plaguing their times. It explored the white migration to the suburbs, urban riots, politicians, etc. , as it expressed the sense of turmoil experienced during that time which seemed to all come together in a â€Å"Ball of Confusion. † The lyrics state that â€Å"the only person talking about love my brother is the preacher†¦ the only person interested in learning is the teacher†(Temptations). These lines express a theme of love and education as the cure to society's problems. In a deeper sense, it says that people should focus on solutions, not the problems which create despair. In the spirit of this solution-based songwriting, a strong, no-holds-barred message to youth about the importance of getting an education was given voice in October of 1966. James Brown's â€Å"Don't Be a Drop Out† is a story of a drop out who compares himself to friends who continued their education. The song says, â€Å"they kept on pushing when the going got tough, and now they know that things don't seem so rough†(Brown). James Brown knew the importance of this first hand having no formal education. He implemented a program which encouraged kids to stay in school and gave scholarships for those that wanted to go to college. Brown also worked to improve the quality of education in urban areas. He later releases two anti-drug songs, â€Å"King Heroin† and â€Å"Public Enemy No. 1. † He had realized the devastation that drugs brought to the black community and the songs were used as the tool to educate blacks about their danger. James had become a role model for black youth not only through his music but through his commitment to the black community, thus serving as a shining example of the lessons of his music. Brown's message of change by improving currently existing systems was conservative in comparison to some more radical artists. These artists, like the Last Poets, belived that change would only come around through a revolution. The Last Poets who use a combination of spoken word and music in their song â€Å"Niggers Are Scared of Revolution† exemplify this. The song addresses apathy in the black community about black revolution and the lack of participation in the movement (Last Poets). Gil Scott Heron is an artist with a similar message. His work â€Å"The Revolution Will Not Be Televised† discuss the media's purposeful ommitasnce of pertinent black issues, and the manner in which change will occur. The song â€Å"Power to the People† by the Chi-Lites was originally the slogan for the Black Panther Party. â€Å"Young, Gifted and Black† by Nina Simone, â€Å"People Get Ready† by the Impressions and Edwin Starr's â€Å"War† are just a few of the many songs which drew the black community together to raise social consciousness. Black music, specifically Soul music, will never diasppear. Though the motivation for the music may change nominally, the spirit behind it will always stay the same. Passion, pain, despair, love and hope, will forever remain key elements of the human experience. This truth is the reason in which we have seen Soul music change to fit the times in which it exists. Some hip-hop artists such as De La Soul, Public Enemy and even Arrested Development carried a strong message of social change. Yet, their time too was limited as the black American climate slightly changed. Today artist such as the crowned king and queen of the newly dubbed category of â€Å"Neo-classic soul† bear the torch. D'Angelo and Erykah Badu talk about revolution and the state of the black community and relationships. Badu's â€Å"On and On† expresses her thoughts of how she feels that we are born into the middle of a world in constant struggle as she says, â€Å"†¦. my life keeps going like a rollling stone†¦.. I was born under water with three dollars and six dimes (a metaphor to 360 degrees in reference to her never-ending struggle)†(Baduizm). D'Angelo addresses the rampant use of marijuana in his â€Å"Brown Sugar† as he writes, â€Å"I want some more of your brown sugar†¦. your love makes me high right to the sky†¦. my eyes are blood burgundy. † His Devil's Pie addresses drugs and money (Belly Soundtrack). Both Badu and D'Angelo give their takes on bad relationships in â€Å"Tyrone† and â€Å"Shit, Damn, Mother Fucker,† respectively. Badu's â€Å"Other Side of the Game† even addresses the issue of being involved with a man who sells drugs. She writes, â€Å"Do I really want my baby†¦.. work ain't honest, but it pays the bills. The subject matter addressed by Badu and D'Angelo express many of the problems endured by today's generation, some of which may not have been experienced in the same manner of generations past. Music is an expression of life. Hence, it can only be a reflection of life's experiences. Soul music speaks directly to the human experience. It attacks the maladies of our existence. It empathizes with our pains, and rejoices in our happiness. Masterfully, has it changed so as that it remains sensitive to our needs today. Only the beat has changed. The Soul of soul, however, the message, will always remain.

Exploring The Fish By Elizabeth Bishop English Literature Essay Essays

Exploring The Fish By Elizabeth Bishop English Literature Essay Essays Exploring The Fish By Elizabeth Bishop English Literature Essay Paper Exploring The Fish By Elizabeth Bishop English Literature Essay Paper every bit good as the stoping rainbows, contains legion mentions to this cognition, every bit good as a cognition of the fish s anatomy ( mica is really the clear, gelatinlike stuff that comprises the fish s swim-bladder ) . The ability of see farther and in more item than with the normal human oculus, which is the power of the field glassess, besides is the power of Bishop s verse form, which enlarges at the same clip as it focuses on the ocular visual aspect of the fish. This extract identifies the writer s purpose of utilizing mica in the verse form. The readers that have experience in the scientific field are to boot referred to see the fish as the storyteller does. The verse form besides has a symbol which is identified through the repeat and initial rhyme of the word rainbow. In line 75, the word rainbow is repeated three times merely before the storyteller Lashkar-e-Taiba s the fish spell. This symbol could be one of spiritual definition when God gave Noah a mark of peace, the rainbow. Possibly, the poet and the fish are now at peace with each other as they go their separate ways. Another significance may be that the fish has a particular ability to flim-flam fishermen by making rainbows perchance through light diffusion of his graduated tables, so he knew that this fisherman would merely allow him travel in awe of his impressiveness. This may be why he did non contend the storyteller. All these poetic devices help the reader get to cognize the fish every bit good as the storyteller knows the fish. The Fish is a narrative verse form by Elizabeth Bishop that exercises poetic elements exemplifying the gimmick of a tremendous fish. Bishop takes advantage of imagination, sensory inside informations, symbols, and similes to heighten the verse form. All of these poetic devices make the verse form existent to the reader by making a image in the reader s head of the narrative that is similar to the poet s apprehension of the verse form.

Definition and Examples of Zeugma

Definition and Examples of Zeugma Zeugma is a  rhetorical term for the use of a word to modify or govern two or more words although its use may be grammatically or logically correct with only one. Adjective: zeugmatic. Rhetorician Edward P.J. Corbett offers this distinction between zeugma and syllepsis: in zeugma, unlike syllepsis, the single word does not fit grammatically or idiomatically with one member of the pair. Thus, in Corbetts view, the first example below would be syllepsis, the second zeugma: You are free to execute your laws, and your citizens, as you see fit.(Star Trek: The Next Generation)Kill the boys and the luggage!​(Fluellen in William Shakespeares Henry V) However, as Bernard Dupriez points out in A Dictionary of Literary Devices (1991), There is little agreement among rhetoricians on the difference between syllepsis and zeugma, and Brian Vickers notes that even the Oxford English Dictionary confuses syllepsis and zeugma (Classical Rhetoric in English Poetry, 1989). In contemporary rhetoric, the two terms are commonly used interchangeably to refer to a figure of speech in which the same word is applied to two others in different senses. Etymology From the Greek, a yoking, a bond Examples and Observations Zeugma is when a word applies to two others in different ways; or to two words when it only semantically suits one. An example of the former quotes Alanis Morissette: You held your breath and the door for me. How chivalrous and zeugmatic. An example of the latter is with wailing mouths and hearts- but dont blame Morissette for this doggerel.(Gary Nunn, Move Over, George Orwell- This Is How to Sound Really Clever. The Guardian, October 11, 2013)He carried a strobe light and the responsibility for the lives of his men.(Tim OBrien, The Things They Carried. McClelland Stewart, 1990)She arrived in a taxi and a flaming rage.(John Lyons, Semantics. Cambridge University  Press, 1977)We were partners, not soul mates, two separate people who happened to be sharing a menu and a life.(Amy Tan, The Hundred Secret Senses. Ivy Books, 1995)[H]e was alternately cudgelling his brains and his donkey when, passing the workhouse, his eyes encountered the bill on the gate.(Charles Dickens, Oliver Twist , 1839) I just blew my nose, a fuse, and three circuit breakers.(The Jim Henson Hour, 1989)I was in no sort of nick for this encounter, I admit, full of fear and afternoon scotch and the homeward tug.(Marin Amis, Money. Jonathan Cape, 1984)Whether the nymph shall break Dianas law,Or some frail China-jar receive a flaw,Or stain her honour, or her new brocade.(Alexander Pope, The Rape of the Lock, 1717)She lowered her standards by raising her glass,Her courage, her eyes and his hopes.(Flanders and Swann, Have Some Madeira, MDear)The theme of the Egg Hunt is learning is delightful and delicious- as, by the way, am I.(Allison Janney as C.J. Cregg in The West Wing) Zeugma as a Writing Fault Like syllepsis, the figure known as zeugma uses a single word to link two thoughts, but in syllepsis the relationship of the linking word to both ideas is correct, whereas in zeugma the relationship is correct for one idea but not for the other. A fabricated example of zeugma might be, He sat munching his sandwich and his beer. An actual example from fiction is, Something odd in the behavior of the pair held his attention and his curiosity. The term zeugma is often used to refer to syllepsis, but as here distinguished it obviously is a writing fault, which syllepsis is not. (Theodore Bernstein, The Careful Writer: A Modern Guide to English Usage. Simon Schuster, 1965)Zeugma is often accidental, as in She wore a rusty black dress, a feather boa, and an alligator handbag; since wore has no legitimate application to handbag, this zeugma is an error. (Edward D. Johnson, The Handbook of Good English. Washington Square, 1991)Confusing and Contradictory Distinctions Between Zeugma and Syll epsisAlthough commentators have historically tried to distinguish between zeugma and syllepsis, the distinctions have been confusing and contradictory: even today agreement on definitions in the rhetorical handbooks is virtually nil (The New Princeton Encyclopedia of Poetry and Poetics, 1993).  Were better off using zeugma in its broadest sense and not confusing matters by introducing syllepsis, a little-known term the meaning of which even the experts cant agree on.  (Bryan A. Garner, The Oxford Dictionary of American Usage and Style, 4th ed. Oxford University Press, 2016) Pronunciation: ZOOG-muh

Understanding Phosphorous, Boron and Other Semiconductor Materials

Understanding Phosphorous, Boron and Other Semiconductor Materials Introducing Phosphorous The process of doping introduces an atom of another element into the silicon crystal to alter its electrical properties. The dopant has either three or five valence electrons, as opposed to silicons four. Phosphorus atoms, which have five valence electrons, are used for doping n-type silicon (phosphorous provides its fifth, free, electron). A phosphorus atom occupies the same place in the crystal lattice that was occupied formerly by the silicon atom it replaced. Four of its valence electrons take over the bonding responsibilities of the four silicon valence electrons that they replaced. But the fifth valence electron remains free, without bonding responsibilities. When numerous phosphorus atoms are substituted for silicon in a crystal, many free electrons become available. Substituting a phosphorus atom (with five valence electrons) for a silicon atom in a silicon crystal leaves an extra, unbonded electron that is relatively free to move around the crystal. The most common method of doping is to coat the top of a layer of silicon with phosphorus and then heat the surface. This allows the phosphorus atoms to diffuse into the silicon. The temperature is then lowered so that the rate of diffusion drops to zero. Other methods of introducing phosphorus into silicon include gaseous diffusion, a liquid dopant spray-on process, and a technique in which phosphorus ions are driven precisely into the surface of the silicon. Introducing Boron   Of course, n-type silicon cannot form the electric field by itself; its also necessary to have some silicon altered to have the opposite electrical properties. So it’s boron, which has three valence electrons, that’s used for doping p-type silicon. Boron is introduced during silicon processing, where silicon is purified for use in PV devices. When a boron atom assumes a position in the crystal lattice formerly occupied by a silicon atom, there is a bond missing an electron (in other words, an extra hole). Substituting a boron atom (with three valence electrons) for a silicon atom in a silicon crystal leaves a hole (a bond missing an electron) that is relatively free to move around the crystal. Other semiconductor materials. Like silicon, all PV materials must be made into p-type and n-type configurations to create the necessary electric field that characterizes a PV cell. But this is done a number of different ways depending on the characteristics of the material. For example, amorphous silicons unique structure makes an intrinsic layer or â€Å"i layer† necessary. This undoped layer of amorphous silicon fits between the n-type and p-type layers to form what is called a p-i-n design. Polycrystalline thin films like copper indium diselenide (CuInSe2) and cadmium telluride (CdTe) show great promise for PV cells. But these materials cant be simply doped to form n and p layers. Instead, layers of different materials are used to form these layers. For example, a window layer of cadmium sulfide or another similar material is used to provide the extra electrons necessary to make it n-type. CuInSe2 can itself be made p-type, whereas CdTe benefits from a p-type layer made from a material like zinc telluride (ZnTe). Gallium arsenide (GaAs) is similarly modified, usually with indium, phosphorous, or aluminum, to produce a wide range of n- and p-type materials.

Investigation of computer use Essay Example | Topics and Well Written Essays - 2500 words

Investigation of computer use - Essay Example As there was no properly trained person the computer remained idle for about six months. The things started to change when one day the Managing Director of the company visited the branch office. Seeing the computer idle he got furious and more of when he realized that there was nobody who could operate the computer and more so that he had no knowledge of this fact. He immediately decided to train the staff in computers. The staff was trained in computer basics, computer accounting and the software used by the company for its day-to-day working. This is how the use of the computer began. The starting phase was not easy. Once the motherboard failed, it took about 10 days to get repaired. Then once the hard disk also failed. The staff found that instead of helping, the computer is proving to actually hinder their work. The demand of energy on them increased for they not only had to perform the routine works but also have to be concerned about the repairing and the maintenance of the computer. Obviously the staff wanted the computer to be removed. However the Managing director persisted with the use of the computers. He requested his the head office Hardware Engineer to take the additional responsibility of the single computer at the Cambridge branch. He happily agreed without asking for extra remuneration for according to him a computer was a toy. He checked the whole system, reinstalled Windows 98 operating system and the other softwares of regular use. He installed antivirus also, and thereafter kept on checking the system regularly. The computer then started working smoothly without any problems. About two years ago a dealer of Dell Computers launched the buy back scheme for the computers. Cambridge’s old computer was quite outdated so the Branch Manager decided to purchase the new one in exchange of the old. Meanwhile the director of the company had decided to fully computerize all the branches and connect them via intranet.