Ergonomic evaluation of workstation design using taguchi experimental approach: a case of an automotive industry

Author(s):  
Raj Kumar ◽  
Harish Kumar Banga ◽  
Raman Kumar ◽  
Sehijpal Singh ◽  
Sunpreet Singh ◽  
...  
2019 ◽  
Vol 14 (5) ◽  
pp. 239-261
Author(s):  
Eugenio Andrés Díaz Merino ◽  
Lincoln Silva ◽  
Julia Marina Cunha ◽  
Ilandir Ferreira da Silva ◽  
Giselle Schmidt Alves Díaz Merino

Author(s):  
Mihriban Whitmore ◽  
Frances E. Mount

The Human Factors and Ergonomics Laboratory (HFEL) at the Johnson Space Center conducted an ergonomic evaluation of the General Purpose Workstation (GPWS), a glovebox-type workstation flown on one of the Spacelab Life Sciences missions. The HFEL study consisted of: (1) Crew evaluations via pre-flight, in-flight questionnaire and structured post-flight interview, and (2) Video analysis. Findings indicate that the workstation design was acceptable for performing dissection tasks. The crew reported that the task distribution between operators was completely acceptable. Based on the video analysis and the crew comments, the glove interface was found to be critical for crew comfort. A follow-up evaluation is planned for an upcoming mission to evaluate a materials science glovebox and the design impact on posture. Additional microgravity evaluations are planned to obtain objective data on postural changes while working at different gloveboxes.


Author(s):  
Mircea Fotino

The use of thick specimens (0.5 μm to 5.0 μm or more) is one of the most resourceful applications of high-voltage electron microscopy in biological research. However, the energy loss experienced by the electron beam in the specimen results in chromatic aberration and thus in a deterioration of the effective resolving power. This sets a limit to the maximum usable specimen thickness when investigating structures requiring a certain resolution level.An experimental approach is here described in which the deterioration of the resolving power as a function of specimen thickness is determined. In a manner similar to the Rayleigh criterion in which two image points are considered resolved at the resolution limit when their profiles overlap such that the minimum of one coincides with the maximum of the other, the resolution attainable in thick sections can be measured by the distance from minimum to maximum (or, equivalently, from 10% to 90% maximum) of the broadened profile of a well-defined step-like object placed on the specimen.


Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.


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