Jumat, 18 September 2009

Pensiunnya Prof. Stephen William Hawking

Contributors:

1. Anton Timur J. (ITB)
2. Widia Prima (STT Garut)
3. Kurniawan (STIKES BP Banjar)
4. Ismail Muhammad S. (UNSOED)
5. Marwanto (UM Jogjakarta)
6. Ridwan Firdaus (UN Jakarta)
7. Uman Miftah S. (UII Jogjakarta)
8. Erwin Prilesmana (STIT BP Banjar)

From Overseas:

1. David Froster (Cambridge University)
2. Wael Alghamdi (MIT Dept. Mathematics)

"Saya orang yang paling beruntung di dunia".
~Stephen W. Hawking~

"Intelligence is the ability to adapt to change"
~Stephen Hawking~

"To confine our attention to terrestrial matters would be to limit the human spirit"
~Stephen Hawking~

"My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all"
~Stephen Hawking~

Stephen William Hawking, CH, CBE, FRS (lahir di Oxford, Britania Raya, 8 Januari 1942; umur 67 tahun) adalah seorang ahli fisika teoritis. Ia adalah seorang profesor Lucasian dalam bidang Matematika di Universitas Cambridge dan anggota dari Gonville and Caius College, Cambridge.

Ia dikenal akan sumbangannya di bidang fisika kuantum, terutama sekali karena teori-teorinya mengenai teori kosmologi, gravitasi kuantum, lubang hitam, dan tulisan-tulisan popnya di mana ia membicarakan teori-teori dan kosmologinya secara umum.

Tulisan-tulisannya ini termasuk novel ilmiah ringan A Brief History of Time, yang tercantum dalam daftar bestseller di Sunday Times London selama 237 minggu berturut-turut, suatu periode terpanjang dalam sejarah.

Meskipun mengalami cacat jasmani yang luar biasa dan mengalami tetraplegia (kelumpuhan) karena motor neuron disease, karir ilmiahnya terus berlanjut selama lebih dari empat puluh tahun.

Buku-buku dan penampilan publiknya menjadikan ia sebagai seorang selebritis akademik dan teoretikus fisika yang termasyhur di dunia.
Sekarang ini, Mr. Hawking mengalami penyakit ALS (sklerosis lateral amiotrofik) sebuah sindrom yang menyerang sistem motorik tubuh, seperti tak mampu berjalan.

Namun walaupun begitu di tetap bersemangat seperti ia katakan:

"Saya orang yang paling beruntung di dunia".

Penyakit ini menyerangnya pada umur 28 tahun.

Hawking Tinggalkan Kursi Newton

Astrofisikawan Inggris, Stephen Hawking, akan pensiun tahun depan sebagai Profesor Lukasian Matematika di Universitas Cambridge, posisi yang dulu pernah dipegang Isaac Newton.

Sudah merupakan kebijakan lembaga pendidikan itu bahwa pemegang jabatan tersebut harus pensiun pada usia 67 tahun, kata seorang juru bicara universitas itu seperti dilaporkan AFP yang dikutip Antara.

Hawking, yang telah memegang jabatan ini sejak 1979 dan bekerja pada Cambridge sejak 1962, genap berusia 67 tahun pada Januari lalu.

Ilmuwan itu, yang bukunya antara lain A Brief History of Time dan berusaha memopulerkan studi tentang fisika bintang, tetap bekerja di universitas itu, sedangkan profesor baru akan diangkat.

Hawking menderita penyakit syaraf motor yang disebut amyotrophic lateral sclerosis (ALS), sehingga dirinya hampir lumpuh dan hanya dapat berkomunikasi lewat bantuan komputer.

Menurut beberapa media online, yang menempati posisi Lucasian Chair of Mathematics disebut Lucasian Professor yang harus menyandang profesor matematika di Universitas Cambridge.

Jabatan tersebut dibentuk pada 1663 oleh Henry Lucas, anggota parlemen Universitas Cambridge pada 1939-1640.

Posisi tersebut akhirnya dikukuhkan oleh Raja Charles II pada 18 Januari 1664.
Lucas, sesuai dengan harapannya, menghibahkan perpustakaan yang memiliki koleksi sekitar 4.000 volume terbitan kepada Universitas itu.

Nama paling terkenal yang memegang jabatan itu adalah ilmuwan nomor wahid dunia, Isaac Newton.
Raja Charles II memberikan 'tugas suci' kepada Newton untuk menjalankan misi keilmuannya.

Research fields

Hawking's principal fields of research are theoretical cosmology and quantum gravity.

In the late 1960s, he and his Cambridge friend and colleague, Roger Penrose, applied a new, complex mathematical model they had created from Albert Einstein's general theory of relativity.

This led, in 1970, to Hawking proving the first of many singularity theorems; such theorems provide a set of sufficient conditions for the existence of a singularity in space-time.

This work showed that, far from being mathematical curiosities which appear only in special cases, singularities are a fairly generic feature of general relativity.

He supplied a mathematical proof, along with Brandon Carter, Werner Israel and D. Robinson, of John Wheeler's "No-Hair Theorem" – namely, that any black hole is fully described by the three properties of mass, angular momentum, and electric charge.
Hawking also suggested that, upon analysis of gamma ray emissions, after the Big Bang, primordial or mini black holes were formed.

With Bardeen and Carter, he proposed the four laws of black hole mechanics, drawing an analogy with thermodynamics. In 1974, he calculated that black holes should thermally create and emit subatomic particles, known today as Hawking radiation, until they exhaust their energy and evaporate.

In collaboration with Jim Hartle, Hawking developed a model in which the Universe had no boundary in space-time, replacing the initial singularity of the classical Big Bang models with a region akin to the North pole: One cannot travel North of the North pole, as there is no boundary there.

While originally the no-boundary proposal predicted a closed Universe, discussions with Neil Turok led to the realisation that the no-boundary proposal is also consistent with a Universe which is not closed.

Hawking's many other scientific investigations have included the study of: quantum cosmology, cosmic inflation, helium production in anisotropic Big Bang universes, large N cosmology, the density matrix of the universe, topology and structure of the universe, baby universes, Yang-Mills instantons and the S matrix, anti de Sitter space, quantum entanglement and entropy, the nature of space and time, including the arrow of time, spacetime foam, string theory, supergravity, Euclidean quantum gravity, the gravitational Hamiltonian, Brans-Dicke and Hoyle-Narlikar theories of gravitation, gravitational radiation, and wormholes.

At a George Washington University lecturer in honors of NASA's 50th anniversary, Prof. Hawking theorized on the existence of extraterrestrial life: "Primitive life is very common and intelligent life is fairly rare.

The Lucasian Professorship:

The Lucasian Professorship was originally granted to the University of Cambridge by Henry Lucas, in December 1663. Henry Lucas, Member of Parliament for the university, had left instructions in his will for the purchase of land to support the professorship.

Below is a list of the past Lucasian Professors.

Name Born-died Period with Chair Major area of research

1. Isaac Barrow 1630-1677 1664-1669 Classics & Mathematics

2. Sir Isaac Newton 1642-1727 1669-1702 Mathematics & Physics

3. William Whiston 1667-1752 1702-1710 Mathematics

4. Nicolas Saunderson 1682-1739 1711-1739 Mathematics

5. John Colson 1680-1760 1739-1760 Mathematics

6. Edward Waring 1736-1798 1760-1798 Mathematics

7. Isaac Milner 1750-1820 1798-1820 Mathematics & Chemistry

8. Robert Woodhouse 1773-1827 1820-1822 Mathematics

9. Thomas Turton 1780-1864 1822-1826 Mathematics

10. Sir George Airy 1801-1892 1826-1828 Astronomy

11. Charles Babbage 1792-1871 1828-1839 Mathematics & Computing

12. Joshua King 1798-1857 1839-1849 Mathematics

13. Sir George Stokes 1819-1903 1849-1903 Physics & Fluid Mechanics

14. Sir Joseph Larmor 1857-1942 1903-1932 Physics

15. Paul A.M. Dirac 1902-1984 1932-1969 Physics

16. Sir M. James Lighthill 1924-1998 1969-1980 Fluid Mechanics

17. Stephen W. Hawking 1942- 1980-2009 Theoretical Physics.