ISSN:0031-9228    

DOI:10.1063/1.2810163

出版商:AIP    

年代:1991

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2810165

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

Interferometers based on matter waves are just the kind of precision tools needed to hone the cutting edge of physics. The de Broglie wavelengths of atoms, for example, are about 10 000 times shorter than those of light, and they offer correspondingly greater sensitivity. Electron and neutron interferometers have been around for some time, but atom interferometers have remained just out of grasp.

ISSN:0031-9228    

DOI:10.1063/1.2810166

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

Uncommon events like the Exxon Valdez oil spill, the Three Mile Island nuclear power plant meltdown and the Persian Gulf war as well as such unremitting problems as global climate change and the balance‐of‐payments deficit point up the urgency of dealing with the nation's energy issues. Congress is now deliberating President Bush's National Energy Strategy. The topic is hardly a new one. In fact, in the words of that immortal American philosopher Yogi Berra, “It'sde´ja` vuall over again.”

ISSN:0031-9228    

DOI:10.1063/1.881263

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

At first glance the nucleic acids and proteins that are the basis of life do not stand out in any way among all the possible polymeric structures. If we look at their functions, however, we find one unique feature of these biological polymers: self‐replication, the distinctive property of living systems. What is self‐replication, and how could this biologically primordial property have originated in an unorganized medium? The solution to the problem of life's origin lies in resolving the paradox of how polymers of rather common structure can exhibit such a distinctive function.

ISSN:0031-9228    

DOI:10.1063/1.881264

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

If you're a physics graduate student, it's highly likely that before you receive your degree, you'll be asked to give a talk on your research—possibly at an APS meeting, or maybe just to fellow students. And once you finally graduate, you'll undoubtedly find yourself standing behind a podium. Whatever the situation, it's going to matter that your presentation be well received and that your audience depart with a favorable impression.

ISSN:0031-9228    

DOI:10.1063/1.881265

出版商:AIP    

年代:1991

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2810167

出版商:AIP    

年代:1991

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2833558

出版商:AIP    

年代:1991

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2810169

出版商:AIP    

年代:1991

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2810171

出版商:AIP    

年代:1991

数据来源: AIP