Award Data

Infrared tunable diode laser spectrometers provide a highly effective means of measuring trace concentrations, with either remote sensing or with advective sampling. It is often desirable to measure more than one trace gas at a time. This is especially true when gas emissions are strongly correlated, such as in combustion emissions where measuring both the CO2 concentration and another minor con ...

This research will explore the use of a virtual polyhedron modeling environment which creates nets, or patterns, for a polyhedron created on the screen, in the teaching of geometry and spatial skills. When the net is printed, cut, folded, and glued together, a 3-dimensional model of the original polyhedron is created. We propose to examine the use of this tool in an instructional setting, to dete ...

SIMOX (Separation by IMplanted Oxygen) technology achieves total dielelectric isolation of active device regions from the substrate and reduces the collection path for ionized charges via the built-in buried oxide which restricts charge movement. Advances in SIMOX technology include radiation hardened memories and gate arrays for space applications, ULSI DRAMS for low voltage operation, thin film ...

Today's extremely powerful, low-cost computer systems offer tremendous potential as learning tools. However, development of high quality educational software, particularly simulations, lags behind. This research will explore the issues in creating highly realistic, very detailed simulations directly targeted for educational purposes. The domain simulated will be a small retail business. This do ...

Lexitek proposes to develop an imaging gamma-ray detector with 1024 x 1024 pixels for arms control verification. The proposed detector significantly enhances the resolution of fissionable material distribution without compromising energy resolution. The detector consists of a scintillating crystal and associated sensors which determine the energy and position of the scintillation with high spat ...

Laser-induced fluorescence (LIF) can sometimes be used as a diagnostic device in biology and medicine. In general, LIF has difficulties in relating the fluorescence spectra to the concentration of the emitters within the tissue, in identifying different species, and in the possibility of destroying the molecules being probed if the wrong excitation wavelength is chosen. Many of the problems asso ...

This proposal describes an effort to improve the education of at-risk youth through web-publishable, project-based activities. These activities might include electronic journalism on community issues, natural science projects, or digital art Galleries. Activities such as these are particularly appropriate for at-risk youth through their power to integrate school and home or street life, to give ...

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An optical sensor capable of producing 3-dimensional time resolved density maps characteristic of shock wavefronts at Mhz sampling rates is proposed. Each map is obtained from simultaneous measurements obtained with a novel refractometer capable of measuring integrated density fluctuations in air to better than 1 part in 3500 per centimeter path length at 1Mhz with good signal to noise (S/N=10). ...