10,766 research outputs found
Are Nonprofits Trustworthy?
Presents findings from a survey of Indiana residents on whether they trust nonprofits and charities to do what is right, compared with governments and corporations. Examines who trusts which institutions and how trust in one affects trust in the others
Case studies of mental models in home heat control: searching for feedback, valve, timer and switch theories
An intergroup case study was undertaken to determine if: 1) There exist distinct mental models of home heating function, that differ significantly from the actual functioning of UK heating systems; and 2) Mental models of thermostat function can be categorized according to Kempton’s (1986) valve and feedback shared theories, and others from the literature. Distinct, inaccurate mental models of the heating system, as well as thermostat devices in isolation, were described. It was possible to categorise thermostat models by Kempton’s (1986) feedback shared theory, but other theories proved ambiguous. Alternate control devices could be categorized by Timer (Norman, 2002) and Switch (Peffer et al., 2011) theories. The need to consider the mental models of the heating system in terms of an integrated set of control devices, and to consider user’s goals and expectations of the system benefit, was highlighted. The value of discovering shared theories, and understanding user mental models, of home heating, are discussed with reference to their present day relevance for reducing energy consumption
Scalar Casimir Energies for Separable Coordinate Systems: Application to Semi-transparent Planes in an Annulus
We derive a simplified general expression for the two-body scalar Casimir
energy in generalized separable coordinate systems. We apply this technique to
the case of radial semi-transparent planes in the annular region between two
concentric Dirichlet cylinders. This situation is explored both analytically
and numerically.Comment: 8 pages, 5 figures. Contribution to Proceedings of 9th Conference on
Quantum Field Theory Under the Influence of External Conditions, QFEXT0
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