Elimination of rocket engine asymmetric loads during tests at sea level

Secondary injection concept eliminates asymmetric loads and may increase thrust rocket engine loads during sea level tests. The concept uses either a tubular manifold with evenly spaced injection ports or secondary fluid injected at the turbine exhaust inlet to the thrust chamber

Two generic transfers and a synonymy for some North American Elateridae (Coleoptera)

During various studies, three instances of necessary taxonomic change were found. These changes are provided here to clarify the taxonomy of these taxa for those studies

Ethical Problems in Evaluation Research

For some time, social scientists have been concerned with ethics in research. Much of what they have written has focused on research in general, but many of the points they raise are applicable to evaluation research in particular. Included among these concerns are informed consent, the right to treatment, the right to refuse treatment, implicit coercion, powerlessness of subjects, and, perhaps most important, external access to confidential data

Making It to the Major Leagues: Career Movement between Library and Archival Professions and from Small College to Large University Libraries

published or submitted for publicatio

Constant-frequency, variable-duty-cycle multivibrator

Circuit provides a pulse source of constant frequency with a duty cycle that is adjustable by an external input signal. It could serve as a switching mode voltage regulator or as a switching source for control systems