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Search results 3491 - 3500 of 8618 matching essays
- 3491: Polio
- ... been identified: the Brunhilde (type 1), Lansing (type 2), and Leon (type 3) strains. Immunity to one strain does not furnish protection against the other two. Poliomyelitis control was made possible when, in 1949, the American bacteriologist John Franklin Enders and his coworkers discovered a method of growing the viruses on tissue in the laboratory. Applying this technique, the American physician and epidemiologist Jonas Salk developed a vaccine prepared from inactivated poliomyelitis viruses of the three known types. After field trials in 1954 the vaccine was pronounced safe and effective, and mass inoculation began. The American virologist Albert Sabin subsequently developed a vaccine containing attenuated, live polio virus that could be given orally. This vaccine, called trivalent oral polio vaccine (TOPV), was licensed in 1963 and has replaced the Salk ...
- 3492: David Levinson: Seasons' of A Man's Life
- ... end in the adolescent stage of life. Levinson's stage theory is important because it goes beyond most theories assuming that development continues throughout adult life. Levinson based his model on biographical interviews of 40 American men. These 40 men were between 35 to 45 years in age and they worked as either biology professors, novelists, business executives or industrial laborers. The biographical interviews lasted one or two hours and ranged ... and unlimiting as a young man who enters Levinson's "Entering the Adult World" phase. A woman's role and choices were much more predetermined and nar row andthis fact alone offers evidence that North American women lead different lives that North American men at the time Levinson's model originated. Yet another example of the difference between men and women's lives (especially during the 50s, 60s, and 70s) is career choices and development of women' ...
- 3493: The Evolution of the Computer
- ... invention is the computer. The electronic computer has been around for over a half-century, but its ancestors have been around for 2000 years. However, only in the last 40 years has it changed the American society. From the first wooden abacus to the latest high-speed microprocessor, the computer has changed nearly every aspect of people's lives for the better. The very earliest existence of the modern day computer ... for many other tasks (Osborne, 146). In 1971 Marcian E. Hoff, Jr., an engineer at the Intel Corporation, invented the microprocessor and another stage in the development of the computer began (Shallis, 121). A new revolution in computer hardware was now well under way, involving miniaturization of computer-logic circuitry and of component manufacture by what are called large-scale integration techniques. In the 1950s it was realized that "scaling down ...
- 3494: The History and Development of Computers
- ... was called a Pascaline. It used eight movable dials to add sums up to eight figures long. Pascal's device used a base of ten to accomplish this. When the ten's dial moved one revolution, the dial representing the hundred's place moved one notch and so on. The drawback to the Pascaline, of course, was its limitation to addition. In 1694, a German mathematician named Gottfried Wilhem von Leibniz ... Babbage borrowed the idea of punch cards to encode the machine's instructions from the Jacquard loom. The loom, produced in 1820, used punched boards that controlled the patterns to be woven. In 1889, an American inventor, Herman Hollerith also applied the Jacquard loom concept to computing. His first task was to find a faster way to compute the U.S. census. Unlike Babbage's idea of using perforated cards to ...
- 3495: Dizzy Gelespie
- ... music as Stravinsky was to ballet."(Yardley, Jan.11). Lavonda Elam, a singer in her late thirties, said at "Dizzy's" funeral service: "He was a fine, powerful musician, and he added so much to American music. I am here to give him some of my time. It's the least I can do because he affected my life as a black American woman." (Watrous, January 13). His solo's and compositions are published in books so other musicians can study and learn from all that he accomplished. His works both melodic and improvisational are consider standard material ... Dizzy" led his band on tours through many foreign countries such as Syria, Pakistan, Greece, and Turkey. The tours and concerts were sponsored by the state department in conjunction with International Exchange Program of the American National Theater and Academy. The money that funded Mr. Gillespie's band was taken from the presidents emergency fund for international affairs. He enjoyed the warmth of politics so much that he ran for ...
- 3496: Donald Barthelme
- Donald Barthelme Donald Barthelme has been called "probably the most perversely gifted writer in the U.S." As well as " one of the best, most significant and carefully developing young American writers" (Harte and Riley, 41). He was born April 7, 1931 to Donald and Helen Barthelme in Philadelphia, Pennsylvania. Barthelme had a wide range of careers during his lifetime. He worked as a newspaper reporter ... Circle Award, the PEN/Faulkner award for Fiction, and the Los Angeles Times Book Prize all in 1982. Barthelme also had the privilege of being widely regarded as one of the ablest and most versatile American stylists (Robert et al, 919). Donald Barthelme passed away July 23, 1989 from cancer in Houston Texas. According to the Literature book Barthelme’s stories contain plots that are "unconventional episodic, a clutter of styles ... with squares filled in with black on each page. All of the stories that I read came from Barthelme’s book Forty Stories. He is "widely regarded as one of the ablest and most versatile American Stylist" (Anderson et al, 919). Barthelme does write about a variety of different topics, which does make him a versatile writer. He is a writer that makes the reader think about what they are ...
- 3497: Duke Ellington
- Edward Kennedy Ellington, American jazz composer, orchestrator, bandleader, and pianist, is considered to be the greatest composer in the history of jazz music and one of the greatest musicians of the 20th century. He composed over 2000 works and ... played by his orchestra. He often wrote pieces for specific players with distinctive musical styles in his band, such as "Concerto for Cootie" (1940) for fellow musician and trumpeter, Cootie Williams. With the help from American trumpeter James "Bubber" Miley, Ellington often incorporated in his music the jungle effect. This effect was made by placing a plunger at the opening of a brass instrument, therefore, muffling or muting the notes played ... playing three different instruments. Improvisation was a big part of Ellington’s music. One of Ellington orchestra’s signature tunes is "Take the ‘A’ Train" (1941). This piece was not written by Ellington but by American composer Billy Strayhorn, who became Ellington’s musical collaborator. This piece is very jumpy and light, making you feel like tapping your feet and following the beat. In the background is a piano in ...
- 3498: The Internet
- ... sites. The Children’s Partnership created a brochure about benefits and risks of the Internet. AT&T has a site for children plus links to safe sites. MCI offers a series of “smart surfing” workshops. American Library Association had a page full of child safe links (The Associated Press A4). Blocking options are available for parents to use for their children. Some blocking devices have three different levels, Children Only, Teen, and 18-plus. To get into 18-plus a password would have to be given. Some computers have an American On-Line notify button. At any given time while on the Internet and adult material is easily viewed, by clicking a button, American On-Line will be notified. By using this, inappropriate material will stop appearing on the Internet (The Associated Press A4). Parents should play a huge role in making sure their children are safely using ...
- 3499: Atomic Bomb
- ... the war in the Pacific earned its own merits in the eradication of lives (Thomas 76). On December 7, 1945, the Japanese navy launched a surprise attack on Pear Harbor, Hawaii, which was the principal American naval base in the Pacific (Johnson 18). The next day, the 'sleeping giant' took action and declared war on Japan. As the war raged on, and as Germany eventually surrendered, the United States found itself ... of this deadly weapon made Truman's decision much easier. He defended his decision with the prospect that at the moment Japan saw the great power of the atomic bomb, they would surrender, therefore saving American lives. Other benefits included "the saving of Japanese lives (compared with the staggering death toll that an invasion would have caused) and being relieved of the disadvantages of Soviet participation in the war" (Yamanaka 128). On August 6, 1945, an American bomber, the Enola Gay, dropped the "Little Boy" bomb on the Japanese city of Hiroshima. And on August 9, a second atomic bomb "the Fat Man" was dropped on the city of Nagasaki (Brown ...
- 3500: Speech Recognition Technology
- ... the end of 1998" (Kolor, 3). The financial, travel, and telecommunications industries have already discovered the advantages of speech recognition technology. Some of the larger companies that already utilize speech recognition are Charles Schwab & Co., American Express, United Airlines, NationsBank, United Parcel Service, British Airways, and Sears Roebuck and Co. These companies focus on the fastest growing parts of the speech market, where the caller's voice replaces punching in letters ... in venture capital. The "system understands most of the ways a customer might ask for a stock. For example, a customer will get the same quote whether he or she asks for ATT, AT&T, American Telephone and Telegraph or American Telegraph and Telephone." (Sinton, 2) The system provides customers with real-time quotes on listed stocks, mutual funds and market indicators. The system has slashed in half the number of calls taken by human ...
Search results 3491 - 3500 of 8618 matching essays
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