Operating environment, performance-influencing factors

In order to select materials that will maintain acceptable mechanical characteristics and dimensional stability one must be aware of both the normal and extreme thermal operating environments to which a product will be subjected. TS plastics have specific thermal conditions when compared to TPs that have various factors to consider which influence the product s performance and processing capabilities. TPs properties and processes are influenced by their thermal characteristics such as melt temperature (Tm), glass-transition temperature (Tg), dimensional stability, thermal conductivity, specific heat, thermal diffusivity, heat capacity, coefficient of thermal expansion, and decomposition (Td) Table 1.2 also provides some of these data on different plastics. There is a maximum temperature or, to be more precise, a maximum time-to-temperature relationship for all materials preceding loss of performance or decomposition. Data presented for different plastics in Figure 1.5 show 50% retention of mechanical and physical properties obtainable at room temperature, with plastics exposure and testing at elevated temperatures. 

By conditioning the loss severity on the duration of the event the model accounts for the strength of the control environment and its effect on operational losses from the event. The probability of occurrence of the event, pe is assessed by a separate BN model in much the same way as control performance, accounting for specific influencing factors. The suggested... 

Human Performance Evaluation identifies feetors that influence task performance. The focus of this analysis method is on operability, work environment, and management factors. Man-machine interfece studies... 

Abstract This chapter outlines the substantive issues when designing handwear and footwear for military applications, in the context of the requirements of fit to UK military personnel, their tasks, and the environment or theatre within which they will operate. First, the nature and level of protection in different circumstances are outlined. Second, fit, physiological maintenance, task performance and other factors that influence design are considered. Finally, future trends in design and production are introduced. In each case, best practice from Human Factors and the application of available technologies are described to provide the optimum compromise within a final design solution. 

Chemical, thermodynamic, and physical principles underpin the corrosion mechanisms and their rates, which occur in any given service test. Each investigator must address the relevant principles operating in the test environment to fully understand the factors influencing performance. 

ABSTRACT Oil spill removal techniques have been developed as passive barriers to reduce the severity of adverse impacts of oil spills on the environment. Among different oil spill removal methods, combination of skimmers and booms are more preferable environmentally, as they can recover the spilt oil from sea permanently. However, a number of factors such as harsh Arctic climatic conditions, presence of sea ice, remote distances, poor visibility, and less developed infrastructure threaten the overall performance of skimmers. Therefore, identifying such influencing parameters and evaluating their impacts on the overall performance of skimmers is of the utmost importance. In this study, the overall performance of skimmers in the Arctic offshore is discussed from the viewpoints of effectiveness and availability performance. Several operational conditions and their impacts on the availability performance of skimmers and their effectiveness in the Arctic offshore are further reviewed and discussed. Changes in physical and chemical properties of spilt oil and their contribution to the window-of-opportunity for a successful skinmiing operation are described, taking into account the severe Arctic climatic conditions. 

PSFs are the set of influences on the performance of an operating crew resulting from the human-related characteristics of the system, the crew, and the individual crew members. The characteristics include procedures, training, and other human factors aspects (e.g., MMIs in a control room, cockpit, alarm station, and operations center) of the working environment. 

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