Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"work recovery"”.
-
Quality assessment of work recovery activities: guidance for recovering from work-related demands
This study tested a revised work recovery process model and provides guidance for work recovery activities based on their recovery quality value. A diverse sample of 540 MTurk workers served as the participants for this in-depth, mixed method approach to evaluating workers’ recovery activities …
-
Experimental and Analytical Investigation of a Two-Phase Ejector Used for Expansion Work Recovery in a Transcritical R744 Air-Conditioning System
… losses make R744 a suitable fluid for expansion work recovery. This study presents experimental and computational results obtained from a transcritical R744 air-conditioning system using a two-phase ejector specifically designed and built for this investigation. The results are compared with that …
-
Experimental and numerical investigation of the design and control of vapor-compression systems with integration of two-phase ejectors for performance enhancement through expansion work recovery
… refrigeration cycles by means of expansion work recovery has received significant attention in the past decade. Research has focused primarily on the design and performance of the ejector and the effect the ejector has on cycle performance. However, recent research has shown that additional …
-
Taking a Functional Approach to Volunteering: Explaining Volunteer Congruence and Work Engagement
… and the satisfaction of those motivations) for work recovery and downstream work engagement. I focused on career and understanding-based volunteer motives and psychological detachment and mastery recovery experiences. This was evaluated using a cross-sectional survey with a sample (N = 119) of …
-
Potentials for COP increase in vapor compression systems
This work presents an experimental and numerical study of three different opportunities for COP increase in vapor compression systems: work recovery ejectors, condenser subcooling and increase of relative size of heat exchangers (HXs). Regarding work recovery ejectors, experimental results showed …
-
Experimental investigation of vortex tube and vortex nozzle for applications in air-conditioning, refrigeration, and heat pump systems
… In this project, the applicability of expansion work recovery through vortex tube in heating and cooling cycles has been examined. Vortex tube thermal separation performance for air, R134a and carbon dioxide is provided. It has been found that when using single-phase vapor as the working fluid …
-
Vortex control of two-phase refrigerant flow in nozzles and its application in ejector vapor compression cycles
… and needle control). It was found that the total work recovery efficiency of ejector with vortex control can be better than series expansion valve control and is close to needle control. The decrease of suction nozzle length significantly improves the performance of ejectors with vortex control. …
-
The Association of Subordinate Perceptions of Supervisor Recovery with Subordinate Recovery Outcomes
Recent literature surrounding the process of recovery from work and work-related demands has included the supervisor as a key variable influencing how and if employees recover from work. Recovery represents the return of personal resources to their pre-work levels and is typically conceptualized as …
-
The Integration of State Space into the Dynamic Synthesis/Design and Operational/Control Optimization of a PEMFC System
… (SS), a fuel processing subsystem (FPS), and a work recovery and air supply subsystem (WRAS). To study the effect of control to the optimization, State Space control design is used in a looped set of optimizations. These results are compared to those resulting from a more direct optimization of …
-
Validation and evaluation of a disability measure for upper extremity musculoskeletal disorder screening in the workplace and prognostic factors of long-term disability
Ten percent of the American working population is disabled due to workplace injury or illness. This dissertation addresses prevention of upper extremity musculoskeletal disorders and the predictors of long-term disability. Early detection of musculoskeletal disorders is key to successful treatment …
-
Dynamic Proton Exchange Membrane Fuel Cell System Synthesis/Design and Operation/Control Optimization under Uncertainty
… subsystem, a fuel cell stack subsystem, a work recovery-air supply subsystem, and a power electronics subsystem. Since these subsystems have different physical characteristics, their integration into a single system/subsystem level unit make the problems of dynamic system synthesis/design …
-
Emotional intelligence: coping and well-being amongst higher education academics. Are they related? How are they experienced?
… mean age of 47.29 (SD = 9.78). All participants worked for universities in different countries around the world. Pearson’s product moment correlation coefficient was used to analyse the quantitative data associated with: coping (Carver, Scheier and Weintraub, 1989), managing emotions (Petrides, …