摘要:

Each year the difficulty in justifying and receiving permission for foreign travel seems to increase. This problem affects academic, industrial, and governmental agencies. The purpose of this note is to argue that each agency should be able to decide within its budget but without interference by unreasonable administrative regulations what travel its staff makes in order to compete in the technical world.

ISSN:0002-8606    

DOI:10.1029/EO055i009p00818

年代:1974

数据来源: WILEY

摘要:

It is five years since the first human beings landed on another planet and then returned to earth. It is almost two years since the last Apollo mission returned to earth from the moon. The excitement of Apollo 11 which reached a large proportion of the population of planet earth is now a quiet, majestic fact in history. The excitement and interest in scientific aspects of all the Apollo missions is active and has grown into an evolving study of our sister planet.

ISSN:0002-8606    

DOI:10.1029/EO055i009p00819

年代:1974

数据来源: WILEY

摘要:

Many of the basic concepts relating to displacement fields associated with earthquakes were lucidly described by H.F. Reid in his discussion of the mechanism of the 1906 San Francisco earthquake, originally published in 1910 and recently republished [Reid, 1969]. His presentation is a natural beginning point for a modern discussion.

ISSN:0002-8606    

DOI:10.1029/EO055i009p00820

年代:1974

数据来源: WILEY

摘要:

With the decline of ancient civilization—the successive incinerations of the great Library of Alexandria in the fourth century and the Moslem conquest of Egypt in the seventh—it remained for Persian and Arabian scholars to assemble, record, and continue to enlarge knowledge. The western world became aware of this heritage during the Crusades of the twelfth century when translations of Arabic records became available in Latin and various other tongues. These events provided the intellectual fuel for the Renaissance and eventually for the industrial revolution, which, according to so me, has about run its course.Today the Arabs are again influencing history. They are making us realize that industrialized society is critically dependent upon the natural abundance of fuels. Indeed, by their petroleum export policies, they have forced us to reexamine our patterns of living and our demands upon the resources of the ea

ISSN:0002-8606    

DOI:10.1029/EO055i009p00828

年代:1974

数据来源: WILEY

摘要:

Recent inquiries about the activities of the U.S. National Committee for Geochemistry and its functions have resulted in an attempt toward improved dissemination of information to geochemists and others interested in the field. It is the committee's intent to report regularly in this and perhaps other appropriate organs on its meetings and other activities of interest, including those of its separately supported Subcommittee on the Geochemical Environment in Relation to Health and Disease, and activities of its ad hoc panels, such as the Panel on Orientations for Geochemistry.

ISSN:0002-8606    

DOI:10.1029/EO055i009p00833

年代:1974

数据来源: WILEY

摘要:

The Sixth Geodesy/Solid Earth and Ocean Physics (GEOP) Research Conwas held on February 4–5, 1974, at the Institute of Geophysics and Planetary Physics, University of California, San Diego, in La Jolla, California. It was attended by about 100 persons.James N. Brune, program chairman, opened the conference and delivered the introductory address, a somewhat extended version of which is printed elsewhere in this issue. Brune's paper and the following summaries of the sessions constitute a report of the conferenc

ISSN:0002-8606    

DOI:10.1029/EO055i009p00836

年代:1974

数据来源: WILEY

摘要:

An International Magnetospheric Study Coordination Office has been established in the Atmospheric Sciences Section of the Division of Environmental Sciences, National Science Foundation, in Washington, D.C. Announcement of the new office was made by NSF director, H. Guyford Stever.

ISSN:0002-8606    

DOI:10.1029/EO055i009p00842

年代:1974

数据来源: WILEY

摘要:

One hundred twenty delegates from twenty‐four countries met in Fredericton, New Brunswick, on May 20th to 25th to participate in an international symposium related to the new adjustments of the North American geodetic networks.The geodetic agencies of Canada, Mexico, and the United States have cooperated for many years in the general development and extension of these control survey networks. Now, because of the remarkable achievements of the last decade, they recognize that it is an opportune time to adopt a new datum for the continental horizontal control network, one that will be accurately referenced to the networks of all other continents, with consideration that it be earth‐centered and a part of a worldwide geodetic sys

ISSN:0002-8606    

DOI:10.1029/EO055i009p00843

年代:1974

数据来源: WILEY

摘要:

A National earthquake program aimed at reducing hazards to life and property and minimizing disruptions of government, business, and private activities is spelled out in a report just published and free on request from the U.S. Geological Survey, Department of the Interior.In the report describing the USGS Earthquake Hazard Reduction program, Robert E. Wallace, a scientist of the Survey's Menlo Park, California, field center who wrote the report, emphasizes that earthquakes pose a serious and growing threat to the nation.

ISSN:0002-8606    

DOI:10.1029/EO055i009p00844

年代:1974

数据来源: WILEY

摘要:

The seemingly common occurrence of flood channels on Mars can be traced to the sudden melting of buried deposits of frozen carbon dioxide, according to a theory advanced by Daniel J. Milton of the U.S. Geological Survey in Menlo Park, California, who points to the Washington scablands and the frozen natural gas fields of Siberia for support.Milton, a member of a team of USGS scientists that is studying and mapping the surface and structure of Mars, says that the channels ‘appear to have been shaped by sudden discharges of water that dwarf the flow of the Amazon

ISSN:0002-8606    

DOI:10.1029/EO055i009p00845

年代:1974

数据来源: WILEY