摘要:

After 40 years of near solitude, New Mexico Tech's Langmuir Laboratory for Atmospheric Research may have to adjust a bit when the Magdalena Ridge Observatory sets up nearby (see accompanying story). In particular, says Langmuir Director Bill Winn, balloons and rockets from thunderstorm research could land on the MRO telescopes, and radio noise from the MRO could interfere with Langmuir measurements. “We can live together—we just have to sort things out,” Winn says.

ISSN:0031-9228    

DOI:10.1063/1.1595047

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

When astronomer Elizabeth Griffin attended the annual International Astronomical Union meeting three years ago in Manchester, England, she issued a challenge to the assembly: Rescue photographic observations. For nearly a century, until digital detectors became common in the late 1980s, star spectra were routinely recorded on photographic plates. But the three million or so plates across the globe are at risk of disappearing owing to neglect and natural disasters. Griffin's challenge is now under the auspices of an IAU working group and the World Spectra Heritage, a nonprofit organization that is attempting to raise $1.5 million to digitize spectrographic plates.

ISSN:0031-9228    

DOI:10.1063/1.1595048

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

Three physicists will share the first annual Global Energy Prize, to be bestowed by President Vladimir Putin on 15 June in St. Petersburg, Russia. The $900 000 purse will be split by Nick Holonyak of the University of Illinois at Urbana‐Champaign, Gennady Mesyats, a vice president of the Russian Academy of Sciences in Moscow, and Ian Douglas Smith of Titan Corp in the San Francisco Bay Area.

ISSN:0031-9228    

DOI:10.1063/1.1595050

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2409977

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

Half a century ago, Edward Purcell and Norman Ramsey initiated a search for an electric dipole moment (EDM) of the neutron and obtained what was considered at the time a remarkably precise result, consistent with zero. Thus began a long line of ever more sensitive EDM experiments on neutrons, atoms, and molecules. Although no EDM has yet been found, the limits set have had decisive influences on elementary particle theories. Now, experiments under way or being planned may at last find an EDM and, in any event, are expected to have a far‐reaching impact on theoretical particle physics.

ISSN:0031-9228    

DOI:10.1063/1.1595052

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

One of the four Aristotelian elements, water has played a central role in scientific thought for millennia. To the physical scientist it is a continuing source of fascination because of its many unusual and counterintuitive properties. For example, liquid water, if sufficiently cold, expands and becomesmorecompressible when cooled, andlessviscous when compressed. Water can also exist in at least two distinct glass forms—a phenomenon known as polyamorphism.

ISSN:0031-9228    

DOI:10.1063/1.1595053

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

Experiments using charged‐particle accelerators have led to remarkable discoveries about the nature of fundamental particles and the behavior of nuclear matter. These breakthroughs have been made possible by dramatic advances in our understanding of the physics and technology of particle acceleration. Accelerator beam energies increased exponentially—by an order of magnitude every decade—for half a century after the pioneering days of John Cockcroft and Ernest Lawrence in the early 1930s, as established technologies were pushed to their limits and superseded by new ones (see figure 1).

ISSN:0031-9228    

DOI:10.1063/1.1595054

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1595055

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1595056

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1595058

出版商:AIP    

年代:1903

数据来源: AIP