Ana Sayfa
=> Maria Agnesi
=> Peter Barlow
=> Charles Babbage
=> Abraham de Moivre
=> Euclid of Alexandria
=> Pierre de Fermat
=> Leonardo Pisano Fibonacci
=> Fourier, (Jean Baptiste) Joseph, Baron
=> Karl Friedrich Gauss
=> Hippasus of Metapontum
=> John Napier
=> Kaprekar's Constant
=> Joseph Louis Lagrange
=> Louis Victor Pierre Raymond duc de Broglie
=> Paul Adrien Maurice Dirac
=> François Viète
=> Johann Bernoulli
=> Sir William Rowan Hamilton
=> Marin Mersenne
=> Charles Augustin de Coulomb
=> Florence Nightingale
=> John Wallis
=> Richard Phillips Feynman
=> Claude Elwood Shannon
=> Jacob (Jacques) Bernoulli
=> Howard Hathaway Aiken
=> August Ferdinand Möbius
=> Ahmes
=> Hipparchus of Rhodes
=> William Thomson (Lord Kelvin)
=> Zeno of Elea
=> Jules Henri Poincaré
=> Edmond Halley
=> Sir Christopher Wren
=> Sofia Vasilyevna Kovalevskaya
=> Grace Brewster Murray Hopper
=> Diophantus of Alexandria
=> Girolamo Cardano
=> Stephen William Hawkingı
=> Edwin Powell Hubble
=> Siméon Denis Poisson
=> Paul Erdös
=> Alan Mathison Turing
=> Augustin Louis Cauchy
=> Benjamin Banneker
=> Niels Henrik Abel
=> Werner Karl Heisenberg
=> Albrecht Dürer
=> Aristarchus of Samos
=> Christiaan Huygens
=> Augusta Ada King, countess of Lovelace
=> Omar Khayyam
=> Herman Hollerith
=> Evariste Galois
=> Bertrand Arthur William Russell
=> Erwin Rudolf Josef Alexander Schrödinger
=> Apollonius of Perga
=> Maurits Cornelius Escher
=> Andrew John Wiles
=> Georg Friedrich Bernhard Riemann
=> Tycho Brahe
=> Max Karl Ernst Ludwig Planck
=> Joseph-Louis Lagrange
=> George Boole
=> Pierre-Simon Laplace
=> Georg Ferdinand Ludwig Philipp Cantor
=> Jean Baptiste Joseph Fourier
=> Marie-Sophie Germain
=> Srinivasa Aiyangar Ramanujan
=> Benoit Mandelbrot
=> Emmy Amalie Noether
=> David Hilbert
=> Robert Hooke
=> Maria Gaëtana Agnesi
=> John Forbes Nash
=> Albert Einstein
=> Sir Isaac Newton
=> Pythagoras of Samos
=> Galileo Galilei
=> Archimedes of Syracuse
=> Blaise Pascal
=> Nicolaus Copernicus
=> Aristotle
=> René Descartes
=> Leonhard Euler
=> Johann Carl Friedrich Gauss
=> Johannes Kepler
=> Plato
=> Niels Henrik David Bohr
=> Claudius Ptolemy
=> Gottfried Wilhelm von Leibniz
=> Leonardo da Vinci
=> Eratosthenes of Cyrene
=> Kurt Gödel
=> Thales of Miletus
=> John Maynard Keynes
=> James Clerk Maxwell
=> Robert Boyle
=> John von Neumann
=> Georg Simon Ohm
=> Norbert Wiener
=> Democritus of Abdera
=> Daniel Bernoulli
Matematik Seçkileri
Sayılar Teorisi
Ziyaretçi defteri

Stephen William Hawkingı

Born: 8 Jan 1942 in Oxford, England

Stephen Hawking's parents lived in London where his father was undertaking research into medicine. However, London was a dangerous place during World War II and Stephen's mother was sent to the safer town of Oxford where Stephen was born. The family were soon back together living in Highgate, north London, where Stephen began his schooling.

In 1950 Stephen's father moved to the Institute for Medical Research in Mill Hill. The family moved to St Albans so that the journey to Mill Hill was easier. Stephen attended St Albans High School for Girls (which took boys up to the age of 10). When he was older he attended St Albans school but his father wanted him to take the scholarship examination to go to Westminster public school. However Stephen was ill at the time of the examinations and remained at St Albans school which he had attended from the age of 11. Stephen writes in [2]:-

I got an education there that was as good as, if not better than, that I would have had at Westminster. I have never found that my lack of social graces has been a hindrance.

Hawking wanted to specialise in mathematics in his last couple of years at school where his mathematics teacher had inspired him to study the subject. However Hawking's father was strongly against the idea and Hawking was persuaded to make chemistry his main school subject. Part of his father's reasoning was that he wanted Hawking to go to University College, Oxford, the College he himself had attended, and that College had no mathematics fellow.

In March 1959 Hawking took the scholarship examinations with the aim of studying natural sciences at Oxford. He was awarded a scholarship, despite feeling that he had performed badly, and at University College he specialised in physics in his natural sciences degree. He only just made a First Class degree in 1962 and in [1] he explains how the attitude of the time worked against him:-

The prevailing attitude at Oxford at that time was very anti-work. You were supposed to be brilliant without effort, or accept your limitations and get a fourth-class degree. To work hard to get a better class of degree was regarded as the mark of a grey man - the worst epithet in the Oxford vocabulary.

From Oxford, Hawking moved to Cambridge to take up research in general relativity and cosmology, a difficult area for someone with only a little mathematical background. Hawking had noticed that he was becoming rather clumsy during his last year at Oxford and, when he returned home for Christmas 1962 at the end of his first term at Cambridge, his mother persuaded him to see a doctor.

In early 1963 he spent two weeks having tests in hospital and motor neurone disease (Lou Gehrig's disease) was diagnosed. His condition deteriorated quickly and the doctors predicted that he would not live long enough to complete his doctorate. However Hawking writes:-

... although there was a cloud hanging over my future, I found to my surprise that I was enjoying life in the present more than I had before. I began to make progress with my research...

The reason that his research progressed was that he met a girl he wanted to marry and realised he had to complete his doctorate to get a job so:-

... I therefore started working for the first time in my life. To my surprise I found I liked it.

After completing his doctorate in 1966 Hawking was awarded a fellowship at Gonville and Caius College, Cambridge. At first his position was that of Research Fellow, but later he became a Professorial Fellow at Gonville and Caius College. In 1973 he left the Institute of Astronomy and joined to the Department of Applied Mathematics and Theoretical Physics at Cambridge. He became Professor of Gravitational Physics at Cambridge in 1977. In 1979 Hawking was appointed Lucasian Professor of Mathematics at Cambridge. The man born 300 years to the day after Galileo died now held Newton's chair at Cambridge.

Between 1965 and 1970 Hawking worked on singularities in the theory of general relativity devising new mathematical techniques to study this area of cosmology. Much of his work in this area was done in collaboration with Roger Penrose who, at that time, was at Birkbeck College, London. From 1970 Hawking began to apply his previous ideas to the study of black holes.

Continuing this work on black holes, Hawking discovered in 1970 a remarkable property. Using quantum theory and general relativity he was able to show that black holes can emit radiation. His success with proving this made him work from that time on combining the theory of general relativity with quantum theory. In 1971 Hawking investigated the creation of the Universe and predicted that, following the big bang, many objects as heavy as 109 tons but only the size of a proton would be created. These mini black holes have large gravitational attraction governed by general relativity, while the laws of quantum mechanics would apply to objects that small.

Another remarkable achievement of Hawking's using these techniques was his no boundary proposal made in 1983 with Jim Hartle of Santa Barbara. Hawking explains that this would mean:-

... that both time and space are finite in extent, but they don't have any boundary or edge. ... there would be no singularities, and the laws of science would hold everywhere, including at the beginning of the universe.

In 1982 Hawking decided to write a popular book on cosmology. By 1984 he had produced a first draft of A Brief History of Time. However Hawking was to suffer a further illness:-

I was in Geneva, at CERN, the big particle accelerator, in the summer of 1985. ... I caught pneumonia and was rushed to hospital. The hospital in Geneva suggested to my wife that it was not worth keeping the life support machine on. But she was having none of that. I was flown back to Addenbrooke's Hospital in Cambridge, where a surgeon called Roger Grey carried out a tracheotomy. That operation saved my life but took away my voice.

Hawking was given a computer system to enable him to have an electronic voice. It was with these difficulties that he revised the draft of A Brief History of Time which was published in 1988. The book broke sales records in a way that it would have been hard to predict. By May 1995 it had been in The Sunday Times best-sellers list for 237 weeks breaking the previous record of 184 weeks. This feat is recorded in the 1998 Guinness Book of Records. Also recorded there is the fact that the paperback edition was published on 6 April 1995 and reached number one in the best sellers in 3 days. By April 1993 there had been 40 hardback editions of A Brief History of Time in the United States and 39 hardback editions in the UK.

Of course Hawking has received, and continues to receive, a large number of honours. He was elected a Fellow of the Royal Society in 1974, being one of its youngest fellows. He was awarded the CBE in 1982, and was made a Companion of Honour in 1989. Hawking has also received many foreign awards and prizes and was elected a Member of the National Academy of Sciences of the United States.


Article by: J J O'Connor and E F Robertson

December 1997

Bugün 25 ziyaretçi (71 klik) kişi burdaydı!