Results 261 to 270 of about 516,930 (293)

Definition of Specific Impulse

The Journal of the Royal Aeronautical Society, 1954
The collected comments of Messrs. Greenwood (December 1953 and October 1954 JOURNAL), Thorne (February and October 1954 JOURNAL), and Asquith and Whitaker (May and October 1954 JOURNAL) on the definition of specific impulse in the field of rocket propulsion argue certain traditional points of view, each of which has enough merit to gain proponents but ...
K. Asquith, J. G. Whitaker
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Cognitive impulsivity in specific learning disabilities

European Child & Adolescent Psychiatry, 2005
Many studies on cognitive impulsivity in learning disabled children have been criticized for their methodological limitations, and they have not dealt with the different types of learning disability. The aim of this study was to overcome these limitations and to assess if there was a significant cognitive impulsivity in reading disorder and/or spelling
Renato, Donfrancesco, Daniele, Mugnaini, Andrea, Dell'Uomo   +2 more
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Specific Impulse Prediction of Solid-Propellant Motors

Journal of Spacecraft and Rockets, 1979
The methods for the theoretical prediction of delivered specific impulse are relatively well known. They involve computing the losses due to two-phase flow, divergence, boundary layer, kinetics, nozzle submergence, and combustion inefficiency. The largest computed loss in typical aluminized solid propellants is the two-phase flow loss; this computation
E. LANDSBAUM, M. SALINAS, J. LEARY
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Optimization of Variable-Specific-Impulse Interplanetary Trajectories

AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2002
An indirect optimization method is used to find optimal trajectories that use solar electric propulsion. Missions that exploit variable specific impulse are compared to constant-specific-impulse trajectories, and the benefit, in terms of payload, is highlighted. The presence of limits on the attainable values of the specific impulse and the use of dual-
Lorenzo Casalino, COLASURDO, Guido
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Definition of specific impulse

Journal of Spacecraft and Rockets, 1953
Regarding the recent Technical Note of Mr. RAsquith and Mr. Whitaker (May 1954 journal):1. The dependence of the weight of a given mass on location is a sufficient reason for the abolition of the ” weight” definition of specific impulse. This is likely to become increasingly apparent as rockets penetrate further into interplanetary space.2.
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Impulsivity and risk for mania: Towards greater specificity

Psychology and Psychotherapy: Theory, Research and Practice, 2012
Background Impulsivity is elevated among people diagnosed with bipolar disorder, and recent evidence suggests that impulsivity can predict onset among those at risk for the disorder. Impulsivity, though, is a broad construct. Objective
Sheri L, Johnson, Charles S, Carver, Serena, Mulé, Jutta, Joormann   +3 more
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Specific pattern of attentional changes in impulsive individuals

Cognitive Neuropsychiatry, 2006
Although impulsivity is recognised as a major psychopathological feature, its cognitive correlates remain controversial. We evaluated readiness to act induced by a warning signal and attentional engagement in healthy impulsive participants.People with high impulsivity scores (HI) and low impulsivity (LI) scores on Barratt's Impulsivity Scale (BIS) were
Franck J, Baylé, Claire, Daban, Dominique, Willard, Marie-Chantal, Bourdel, Jean-Pierre, Olié, Marie-Odile, Krebs, Isabelle, Amado-Boccara   +6 more
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