Thermal vacuum life test facility for radioisotope thermoelectric generators

In the late 1970's, the Department of Energy (DOE) assigned Monsanto Research Corporation, Mound Facility, now operated by EG G Mound Applied Technologies, the responsibility for assembling and testing General Purpose Heat Source (GPHS) radioisotope thermoelectric generators (RTGs). Assembled and tested were five RTGs, which included four flight units and one non-flight qualification unit. Figure 1 shows the RTG, which was designed by General Electric AstroSpace Division (GE/ASD) to produce 285 W of electrical power. A detailed description of the processes for RTG assembly and testing is presented by Amos and Goebel (1989). The RTG performance data are described by Bennett, et al. (1986). The flight units will provide electrical power for the National Aeronautics and Space Administration's (NASA) Galileo mission to Jupiter (two RTGs) and the joint NASA/European Space Agency (ESA) Ulysses mission to study the polar regions of the sun (one RTG). The remaining flight unit will serve as the spare for both missions, and a non-flight qualification unit was assembled and tested to ensure that performance criteria were adequately met. 4 refs., 3 figs

Unawareness and/or denial of disability: Implications for occupational therapy intervention

Occupational therapy focus on client-centred, occupational performance intervention may become complicated by the phenomena of self-awareness. The problem of awareness deficits in clients with neurological disorders may be attributed to neurological impairment of self-awareness and/or psychological denial of disability. These phenomena present themselves more commonly in combination than dichotomously and have implications for treatment outcomes. Individuals with impaired self-awareness or denial face difficulties with motivation and participation in therapy, and the adoption of compensatory strategies, which ultimately impacts on rehabilitation outcome. The extent of unawareness versus denial can be assessed by observation of a client's behavior and this information can be very useful in directing the treatment approach. The purpose of this paper is, therefore, to discuss the phenomenon of unawareness and/or denial of disability and its importance to successful rehabilitation outcomes, current thinking and research conducted in different countries. Also, detailed case examples of three clients representing three major populations of traumatic brain injury, stroke and schizophrenia who may exhibit unawareness and/or denial of disability will be presented, including intervention strategies for both phenomena