摘要:

InThe Structure of Scientific Revolutions, Thomas S. Kuhn suggested that science progresses discontinuously: As a scientific theory becomes obsolete, a period of crisis results, at the end of which the old theory is overthrown and replaced by a new, sounder, more complete theory [Kuhn, 1962]. After the scientific community has accepted the new [paradigm,]it undertakes only routine research until a new crisis occurs, usually as a result of an anomalous experiment that accidentally happens to be critical.

ISSN:0002-8606    

DOI:10.1029/EO068i020p00529-01

年代:1987

数据来源: WILEY

摘要:

The U.S. Geological Survey (USGS) has developed new mathematical models of the magnetic field in the United States. The models describe the direction and intensity of the field at the beginning of 1985 and the rate of change expected during the next few years. They were derived from several tens of thousands of original field measurements from land, marine, and aerial surveys; from values synthesized from the Magsat‐based International Geomagnetic Reference Field (IGRF) model for 1985; and from recent data from magnetic observations and repeat stations. The models will serve as the basis for a new set of magnetic charts, now in preparation. Figure 1 is a simplified small‐scale version of the chart of declinat

ISSN:0002-8606    

DOI:10.1029/EO068i020p00530-02

年代:1987

数据来源: WILEY

ISSN:0002-8606    

DOI:10.1029/EO068i020p00531-01

年代:1987

数据来源: WILEY

摘要:

Seth A. Stein, one of the editors of theJournal of Geophysical Research—Solid Earth and Planets, says that his approach to editing the journal is based on the premise that authors, reviewers, and editors are all drawn from the same community: the journal's readers. “We all want JGR to publish interesting papers of the highest possible quality. Each of us believes that the papers we review are improved by our comments. It follows, although it is a little harder for most of us to accept, that our own papers generally contain better science and are more useful to readers as a result of reviews,” Stein toldEos.Stein, an associate professor of geological sciences at Northwestern University (Evanston, Ill.), is one of the seven editors of JGR—Solid Earth and Planets for 1987 and 1988 (see box). His specialties are tectonophysics and sei

ISSN:0002-8606    

DOI:10.1029/EO068i020p00538

年代:1987

数据来源: WILEY