210,092 research outputs found
Progressive practice, markets and managerialism
It has become commonplace to
bemoan the impact of a crude
managerialism upon education. The
concern with cost and efficiency
and the incorporation of scientific
management within post
compulsory education is understood
to undermine educational principles
and rests upon the metaphor of the
'speed up' which is both seen and
experienced as harmful
Airborne Visible/Infrared Imaging spectrometer AVIS: Design, characterization and calibration
The Airborne Visible/Infrared imaging Spectrometer AVIS is a hyperspectral imager designed for environmental monitoring purposes. The sensor, which was constructed entirely from commercially available components, has been successfully deployed during several experiments between 1999 and 2007. We describe the instrument design and present the results of laboratory characterization and calibration of the system's second generation, AVIS-2, which is currently being operated. The processing of the data is described and examples of remote sensing reflectance data are presented
Asynchronous Variational Contact Mechanics
An asynchronous, variational method for simulating elastica in complex
contact and impact scenarios is developed. Asynchronous Variational Integrators
(AVIs) are extended to handle contact forces by associating different time
steps to forces instead of to spatial elements. By discretizing a barrier
potential by an infinite sum of nested quadratic potentials, these extended
AVIs are used to resolve contact while obeying momentum- and
energy-conservation laws. A series of two- and three-dimensional examples
illustrate the robustness and good energy behavior of the method
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