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The paper evaluates current knowledge about the nature of internal war and the types of research being undertaken to increase this knowledge. There were 380 conflicts in the world in the 19 years following World War 2, involving 81 percent of the 123 independent countries in the world. During this period, there were from 13 to 30 new conflicts each year and an average of 13.6 on-going conflicts each month, but there was no formal declaration of war in any conflict. The crucial conceptual issues about internal war are still in the pretheoretical stage. New research on internal war should examine the interaction of the antagonists on a time-line basis, utilize reliable attitudinal data, and examine what happens after hostilities are over, since the real impact of a revolution seems to occur after rather than during the period of active combat. (Author).

"A critical factor affecting operator performance in any man-machine system is the layout of his workplace. This report provides a compilation of human engineering recommendations concerning various aspects of workplace layout. Whenever these recommendations are the direct outgrowth of research in this field, the appropriate research studies are cited. When no research has been done on a specific problem, the authors draw upon their own experiences to provide the necessary recommendations. All recommendations have been reviewed by a number of experts in the field prior to final publication. The report is divided into four main parts, entitled: General Considerations, Workplace Dimensions, Location of Controls and Displays, Direction-of-Movement Relationships. Check lists, figures and tables are used frequently as means of presenting recommendations. A table of contents and a subject index are also provided as aids to the user."--Abstract.

The paper evaluates current knowledge about the nature of internal war and the types of research being undertaken to increase this knowledge. There were 380 conflicts in the world in the 19 years following World War 2, involving 81 percent of the 123 independent countries in the world. During this period, there were from 13 to 30 new conflicts each year and an average of 13.6 on-going conflicts each month, but there was no formal declaration of war in any conflict. The crucial conceptual issues about internal war are still in the pretheoretical stage. New research on internal war should examine the interaction of the antagonists on a time-line basis, utilize reliable attitudinal data, and examine what happens after hostilities are over, since the real impact of a revolution seems to occur after rather than during the period of active combat. (Author).

The objective of this study was to evaluate two experimental charts designed for use in navigating high-speed, high-altitude aircraft. The evaluation procedures included readability tests, under daylight and night lighting conditions, and questionnaires designed to elicit pilots' opinions about which chart they preferred. In one set of readability tests, the World Aeronautical Chart (WAC) was also included to permit a comparison of the experimental charts with a traditional chart. The results indicated that both experimental charts were superior to the WAC in presenting information for cross-country missions in jet aircraft. The two experimental charts appear to be similar to each other. However, each chart has several features which proved superior in presenting certain types of navigational information to the pilot. These features, which are cited in the following summary of recommendations, should be considered in the development of an improved chart for navigation in high-speed, high-altitude aircraft.