摘要:

Step into microbiologist Rita Colwell's new office at Canon US Life Sciences Inc in Arlington, Virginia, and you can trace the last six years of her career simply by studying the walls. Just inside the door is a signed photo from Al Gore, who was vice president when Colwell was appointed head of NSF six years ago. Hanging next to Gore's picture is one of former President Clinton with Colwell at an event. Across the room hangs the photo of Representative Sherwood Boehlert (R‐NY), chairman of the House Committee on Science, and behind her desk is a picture of Colwell with President George W. Bush and his wife, Laura. Next to that is Paul Sarbanes, the senior Democratic senator from Maryland and a friend of Colwell's.

ISSN:0031-9228    

DOI:10.1063/1.1784268

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Hoping to both anticipate pitfalls and head off a publicity fiasco, policymakers and scientists are promoting research and public discussion on environmental, ethical, economic, and other societal implications of the burgeoning field of nanotechnology.

ISSN:0031-9228    

DOI:10.1063/1.1784269

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

An American Physical Society panel is urging the federal government to wait until key technical and policy issues are answered before embracing a National Nuclear Security Administration (NNSA) proposal to build a multibillion‐dollar facility to manufacture new plutonium cores for the US nuclear weapons stockpile.

ISSN:0031-9228    

DOI:10.1063/1.1784270

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

On 25 June, a two‐day commemoration of the centenary of J. Robert Oppenheimer's birth kicks off with a dedication by Senators Pete V. Domenici (R‐NM) and Jeff Bingaman (D‐NM) at the house in Los Alamos, New Mexico, where Oppenheimer and his family lived while he headed the Manhattan Project. The house remains essentially unchanged—it still has the same baby grand piano that Edward Teller once played. Helene and Gerry Suydam, who bought the house in 1946, will stay there as long as they wish, and it will eventually become a museum.

ISSN:0031-9228    

DOI:10.1063/1.1784271

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2408566

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Victor Veselage, in a paper Published in 1998, pondered the consequences for electromagnetic waves interacting with a hypothetical material for which both the electronic permittivity &egr; and the magnetic permeability &mgr; were simultaneously negative. Because no naturally occurring material or compound has ever been demonstrated with negative &egr; and &mgr;, Veselago wondered whether this apparent asymmetry in material properties was just happenstance or perhaps had a more fundamental origin. He concluded that not only should such materials be possible, but if ever found, they would exhibit remarkable properties unlike those of any known materials and would give a twist to virtually all electromagnetic phenomena. Foremost among these properties is a negative index of refraction.

ISSN:0031-9228    

DOI:10.1063/1.1784272

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

Albert Einstein's general theory of relativity, completed in 1915, provided the tools needed to describe the universe's structure and to determine the propagation of light through it. It showed that if one pretends that spacetime has no curvature, then light would appear to be deflected as it passes by a gravitational potential well. Such bending—now called gravitational lensing—was seen for the first time during the solar eclipse of 29 May 1919 by British expeditions in Sobral, Brazil, and on Pri´ncipe Island, off the west coast of Africa. The expeditions observed stars near the edge of the Sun and measured their displacement to be closer to Einstein's prediction of 1.7 arc‐seconds than to the Newtonian prediction of half that value. The 1919 measurements represented a major triumph for Einstein's theory.

ISSN:0031-9228    

DOI:10.1063/1.1784273

出版商:AIP    

年代:1904

数据来源: AIP

摘要:

What follows is the transcript of a half‐hour videotape, recorded on 25 February 2003, in which I interview my Cornell University colleague Hans Bethe about the early days of solid‐state physics and the role he played in its development. The tape was shown about a week later as part of a standing‐room‐only session of the American Physical Society's forum on the history of physics, organized by historian Lillian Hoddeson, at the 2003 APS March meeting in Austin, Texas. Hans and I were not there.

ISSN:0031-9228    

DOI:10.1063/1.1784274

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1784275

出版商:AIP    

年代:1904

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1784276

出版商:AIP    

年代:1904

数据来源: AIP