Mitre Corporation

About: Mitre Corporation is a company organization based out in Bedford, Massachusetts, United States. It is known for research contribution in the topics: Air traffic control & National Airspace System. The organization has 4884 authors who have published 6053 publications receiving 124808 citations. The organization is also known as: Mitre & MITRE.

Dynamic address binding in communication networks

Abstract: A communications network comprising a plurality of destination stations and associated server stations, each destination station having a unique destination address, and a unique destination name containing no semantic information relating to an associated server station, each server station having a unique server address, and being capable of storing the destination address of each destination station with which it is associated, the server address being found by an algorithmic manipulation of the destination name of any destination station that is associated with the server station.

Air and sea rescue via satellite systems: Even experimental systems have helped survivors of air and sea accidents. Two different approaches are discussed

Abstract: The Cospas-Sarsat project aims to develop a scheme in which a small battery-powered transmitter on a ship or aircraft would be activated, manually or automatically, in an accident. Once activated, the transmitter, or beacon, would emit a low-power omnidirectional signal that would be picked up by a satellite. The satellite would relay the distress signal to an earth station, which in turn would send the message over conventional communication lines to a rescue center. Concurrently with development work on this project, and experiment with high-orbit geostationary search-and-rescue satellites is in progress. The geostationary experiment is aimed exclusively at the commercial maritime industry and is considering only the technical aspects of the beacon-to-satellite and satellite-to-earth links under uniform, controlled conditions. This program is using satellites and earth stations of Inmarsat, the 31-nation consortium that offers satellite communication services to merchant ships and offshore oil rigs.

Methods and systems for mobile navigational applications using global navigation satellite systems

Abstract: The present invention relates to providing navigation guidance for mobile users, using Global Navigation Satellite Systems (GNSSs) for applications where the user position needs to be determined in real time while meeting the navigation requirements, especially integrity requirement, for the given application. The present invention assists in providing guidance with a high availability of integrity function by trading accuracy for integrity for two different types of navigation applications. A first type of application requires a capability of detecting an occurrence of multiple satellite signal faults; the first embodiment of the invention provides this capability with a high availability of integrity, using two or more independent GNSSs. A second type of application requires a capability of detecting an occurrence of a single satellite signal fault; the second embodiment of the invention provides this capability with a high availability of integrity, using any one or a combination of GNSSs. The detecting and deriving of both methods are (i) in position domain and (ii) determinative of mobile user safety.

Piecewise planar surface models from sampled data

Abstract: Interactive visualization of three dimensional data requires construction of a geometric model for rendering by a graphics processor. We present an automated method for transforming dense, uniformly sampled data grids to an irregular triangular mesh that represents a piecewise planar approximation to the sampled data. The mesh vertices comprise surface-specific points, which characterize important surface features. We obtain surface-specific points by a novel application of linear and non-linear filters, and thresholding. We define a procedure for constructing a triangulation, derived from a Delaunay triangulation, that conforms to the sampled data. In our example application, modeling a terrain surface over a large area, an 80% reduction in polygons maintains an acceptable fit. This method also extends to the tessellation of images. Applications include scientific visualization and construction of virtual environments.

Predicting Raman Spectra Using Density Functional Theory

Abstract: Accurately computing molecular Raman spectra would enable rapid development of inexpensive and extensive Raman libraries. This is especially beneficial for chemicals that are regulated, toxic, or otherwise difficult to handle. Numerous quantum mechanical methods have been developed that enable computation of Raman spectra. Here, we study the B3LYP exchange correlation functional with various combinations of basis sets, polarization functions, and diffuse functions to determine which combination best computes the Raman spectra for explosive and nonexplosive molecules. In comparing spectra, three metrics were utilized: the root mean square error, the earth mover's distance, and the weighted cross-correlation average. The earth mover's distance and weighted cross-correlation metrics are shown to have significantly greater power at detecting spectral similarities and differences than the root mean square error. Across all methods and molecules examined, B3LYP/6-311++G(d,p) was found to provide the best match between measured and computed Raman spectra. Spectra generated at the B3LYP/6-311++G(d,p) level were found to be accurate enough to correctly identify each molecule out of a set of measured molecular spectra.