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Abstract:Department of Endocrinology, Peace Hospital of Changzhi Medical College, Changzhi 046000, China. wysws@tom.com
Abstract This paper is intended as a guide on the relative effects of loading, service factor and temperature on the expected insulation life of electric motors. Most refinery, pipeline and chemical plant operators are not motor or insulation designers; neither are the authors. But they do have many discussions with plant operators who want to know the practical answers to questions involving these factors. This paper attempts to address these questions with practical answers
Abstract This paper is intended as a guide on the relative effects of loading, service factor and temperature on the expected insulation life of electric motors. Most refinery, pipeline and chemical plant operators are not motor or insulation designers; neither are the authors. But they do have many discussions with plant operators who want to know the practical answers to questions involving these factors. This paper attempts to address these questions with practical answers
[Quality of life studies in nursing science (2). Community adjustment of chronic schizophrenics: effects on life satisfaction and self-esteem (2)] [Article in Japanese] Hayama Y. The purpose of this study was to test two community adjustment models of the chronically mentally ill developed by this author. The study was to determine the effects of daily living, work, family, and social adjustment on life satisfaction and self-esteem as well as to determine the effects of chronicity and symptomatology on the four adjustments. Twenty schizo...
Lubricant considerations for rolling-element bearings have within the last two decades taken on added importance in the design and operation of mechanical systems. The phenomenon which limits the useful life of bearings is rolling-element or surface pitting fatigue. The elastohydrodynamic (EHD) film thickness which separates the ball or roller surface from those of the raceways of the bearing directly affects bearing life. Chemical additives added to the lubricant can also significantly affect bearings life and reliability. The interaction of t...
Lubricant considerations for rolling-element bearings have within the last two decades taken on added importance in the design and operation of mechanical systems. The phenomenon which limits the useful life of bearings is rolling-element or surface pitting fatigue. The elastohydrodynamic (EHD) film thickness which separates the ball or roller surface from those of the raceways of the bearing directly affects bearing life. Chemical additives added to the lubricant can also significantly affect bearings life and reliability. The interaction of t...
School of Medicine, University of California-San Francisco, San Francisco, California.
Abstract All technological developments progress through a series of life cycles. Managers of technology must be fully aware of how these life cycles interact. Technology life cycles can have significant impacts on society. These impacts arise from interaction of a myriad of forces which may be represented by a model, using the Pearl equation of sigmoidal curves. Technologies impact the productivity of industries and in turn, affects the number of workers. The introduction of new technology leads to higher productivity and could eventually cau...
Abstract All technological developments progress through a series of life cycles. Managers of technology must be fully aware of how these life cycles interact. Technology life cycles can have significant impacts on society. These impacts arise from interaction of a myriad of forces which may be represented by a model, using the Pearl equation of sigmoidal curves. Technologies impact the productivity of industries and in turn, affects the number of workers. The introduction of new technology leads to higher productivity and could eventually cau...
Baseline burner rig hot corrosion with Udimet 700, Rene' 80; uncoated and with RT21, Codep, or NiCoCrAlY coatings were tested. Test conditions are: 900C, hourly thermal cycling, 0.5 ppm sodium as NaCl in the gas stream, velocity 0.3 Mach. The uncoated alloys exhibited substantial typical sulfidation in the range of 140 to 170 hours. The aluminide coatings show initial visual evidence of hot corrosion at about 400 hours, however, there is no such visual evidence for the NiCoCrAlY coatings. The turbine components show sulfidation. The extent of t...
Baseline burner rig hot corrosion with Udimet 700, Rene' 80; uncoated and with RT21, Codep, or NiCoCrAlY coatings were tested. Test conditions are: 900C, hourly thermal cycling, 0.5 ppm sodium as NaCl in the gas stream, velocity 0.3 Mach. The uncoated alloys exhibited substantial typical sulfidation in the range of 140 to 170 hours. The aluminide coatings show initial visual evidence of hot corrosion at about 400 hours, however, there is no such visual evidence for the NiCoCrAlY coatings. The turbine components show sulfidation. The extent of t...
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