Author: Ram R. BishuPublisher:
ISBN:
Category : Life support systems (Space environment)
Languages : en
Pages : 20
Book Description
Force-endurance Capabilities of Extravehicular Activity (EVA) Gloves at Different Pressure Levels
Author: Ram R. BishuPublisher:
ISBN:
Category : Life support systems (Space environment)
Languages : en
Pages : 20
Book Description
Investigation of the Effects of Extra Vehicular Activity (Eva) and Launch and Entry (Les) Gloves on Performance
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781792788819
Category :
Languages : en
Pages : 32
Book Description
Human capabilities such as dexterity, manipulability, and tactile perception are unique and render the hand as a very versatile, effective and a multipurpose tool. This is especially true for unknown environments such as the EVA environment. In the microgravity environment interfaces, procedures, and activities are too complex, diverse, and defy advance definition. Under these conditions the hand becomes the primary means of locomotion, restraint, and material handling. Facilitation of these activities, with simultaneous protection from the cruel EVA environment are the two, often conflicting, objectives of glove design. The objectives of this study was (1) to assess the effects of EVA gloves at different pressures on human hand capabilities, (2) to devise a protocol for evaluating EVA gloves, (3) to develop force time relations for a number of EVA glove pressure combinations, and (4) to evaluate two types of launch and entry suit gloves. The objectives were achieved through three experiments. The experiments for achieving objectives 1, 2, and 3 were performed in the glove box in building 34. In experiment 1 three types of EVA gloves were tested at five pressure differentials. A number of performance measures were recorded. In experiment 2 the same gloves as in experiment 1 were evaluated in a reduced number of pressure conditions. The performance measure was endurance time. Six subjects participated in both the experiments. In experiment 3 two types of launch and entry suit gloves were evaluated using a paradigm similar to experiment 1. Currently the data is being analyzed. However for this report some summary analyses have been performed. The results indicate that a) With EVA gloves strength is reduced by nearly 50 percent, b) performance decrements increase with increasing pressure differential, c) TMG effects are not consistent across the three gloves tested, d) some interesting gender glove interactions were observed, some of which may have been due to the exte...
Muscle Strength
Author: Shrawan KumarPublisher: CRC Press
ISBN: 0203503597
Category : Technology & Engineering
Languages : en
Pages : 554
Book Description
Muscle strength is an important topic for ergonomics practitioners and physiologists to understand, especially as it relates to workplace injuries. Muscle strength and function is at the heart of many injuries that lead to reduced productivity and economic strain on the worker, the company, and society as a whole. This comprehensive source o
Biomechanics in Ergonomics
Author: Shrawan KumarPublisher: CRC Press
ISBN: 0849379091
Category : Medical
Languages : en
Pages : 744
Book Description
Safety or comfort? Can you truly have one without the other? Is it feasible to have both? Although by no means the only factor, a deep understanding of biomechanics plays a leading role in the design of work and workplaces that are both pain and injury free. Standing firmly on the foundation built by the previous edition, the second edition of Biom
Scientific and Technical Aerospace Reports
Author: Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 872
Book Description
Monthly Catalog of United States Government Publications
Author: Investigation of the Effects of Extravehicular Activity (Eva) Gloves on Performance
Author: National Aeronautics and Space Adm NasaPublisher: Independently Published
ISBN: 9781729363355
Category : Science
Languages : en
Pages : 54
Book Description
The objective was to assess the effects of extravehicular activity (EVA) gloves at different pressures on human hand capabilities. A factorial experiment was performed in which three types of EVA gloves were tested at five pressure differentials. The independent variables tested in this experiment were gender, glove type, pressure differential, and glove make. Six subjects participated in an experiment where a number of dexterity measures, namely time to tie a rope, and the time to assemble a nut and bolt were recorded. Tactility was measured through a two point discrimination test. The results indicate that with EVA gloves strength is reduced by nearly 50 percent, there is a considerable reduction in dexterity, performance decrements increase with increasing pressure differential, and some interesting gender glove interactions were observed, some of which may have been due to the extent (or lack of) fit of the glove to the hand. The implications for the designer are discussed. Bishu, Ram R. and Klute, Glenn Johnson Space Center...
Investigation of the Effects of Extravehicular Activity (EVA) Gloves on Performance
Author: Ram R. BishuPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 56
Book Description
Author: