摘要:

ONE year ago this month the President's personal advisor on atomic energy matters, Admiral Lewis L. Strauss, succeeded Gordon Dean as chairman of the Atomic Energy Commission. Four days after assuming office, Strauss had taken steps to initiate a new security and loyalty investigation of the theoretical physicist who had served a decade earlier as the chief architect of the atomic weapons program to which the AEC owes its existence. Robert Oppenheimer, as wartime laboratory director at Los Alamos, had demonstrated qualities of wisdom, imagination, and leadership that were remarkably suited in that urgent atmosphere to the administration of a laboratory staffed predominantly by civilian scientists, both American and foreign born, whose work had to be done in close cooperation with professional military personnel. The spectacular success of the undertaking is now history, the A bomb has been dwarfed by the H bomb, patterns of international tension have been drastically altered, traitorous disclosures of secret atomic information have come to light, and security clearance requirements for secret work have been stiffened and made subject to new and uncompromising standards.

ISSN:0031-9228    

DOI:10.1063/1.3061714

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

NOBEL LAUREATE P. A. M. Dirac, Lucasian professor of mathematics at Cambridge University, is reported to have been denied permission to enter the United States. Dirac, who has been in this country several times in recent years, was invited to come to Princeton this year as a visiting physicist at the Institute for Advanced Study, which is directed by J. R. Oppenheimer. On May 26th Dirac said that his visa application had been “turned down flat” under the terms of Section 212 A of the Immigration and Naturalization Act, a lengthy list of reasons for denying entry that covers categories of undesirables ranging from vagrants to stowaways.

ISSN:0031-9228    

DOI:10.1063/1.3061715

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

The evidence for the existence of winds in the ionosphere is now manifold. It is partly directly visual, from the motion of luminous meteor trails and high luminous night clouds and patchiness in the night airglow. It is partly based on inference from indirect observations, such as the geomagnetic variations at the earth's surface; these are ascribed to electric currents partly flowing in the ionosphere, which are explained by dynamo action of ionospheric motions. Another type of indirect observational evidence is provided by the scintillation of radio stars. The most abundant and varied evidence, however, is afforded by inference from observations in which human experiment also plays a vital part, namely by the transmission of radio beams to the ionosphere and their reception after they have been modified by passage through that region, either solely by the influence of ionospheric motion, or by the fleeting presence there of ionized meteor trails.

ISSN:0031-9228    

DOI:10.1063/1.3061716

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

In reporting to my peers on my stewardship I shall be brief and cover only that portion of my duties that have direct impact on you. I shall not touch on the problems associated with the internal management of research and development within the Navy Department.

ISSN:0031-9228    

DOI:10.1063/1.3061686

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

As a friend of very long standing, I should like to say a few words in memory of Fritz London, who so prematurely passed away on March 30, 1954.

ISSN:0031-9228    

DOI:10.1063/1.3061687

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

The strong focusing principle; Negentropy; The study of color centers; For centuries; The new 60‐inch cyclotron.

ISSN:0031-9228    

DOI:10.1063/1.3061690

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

Former NBS Director; A new series; A recently announced; Nuclear data; A list of translations; McGraw‐Hill Book Company.

ISSN:0031-9228    

DOI:10.1063/1.3061691

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

The Federation of American Scientists.

ISSN:0031-9228    

DOI:10.1063/1.3061692

出版商:AIP    

年代:1954

数据来源: AIP

摘要:

Ilia E. Mouromtseff,professor of physics at Upsala College in East Orange, New Jersey, since 1947, died May 18th at his home in Montclair.

ISSN:0031-9228    

DOI:10.1063/1.3061698

出版商:AIP    

年代:1954

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.3061701

出版商:AIP    

年代:1954

数据来源: AIP