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Showing 1 to 20 of 289 for “"point source"”.
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Point source optical propagation in a multiple scattering medium
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Efficient localization methods for a point source and rigid body
… the past few years. Localization of a signal source is often accomplished by using a number of sensors that measure the radiated signal from the source, here we consider the range based measurements, including time of arrival (TOA) and time difference of arrival (TDOA). In such study, the …
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Point Source Turbulent Diffusion for an Air Flow in a Duct
Made available in DSpace on 2014-12-05T17:15:25Z (GMT). No. of bitstreams: 1 5801694.pdf: 3263997 bytes, checksum: e8544da0f5cba418fc7ef23bd37d1caf (MD5) Previous issue date: 1958
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Elektrische Charakterisierung freistehender Nanodrähte mit dem Low Energy Electron Point Source Mikroskop
… developed. While imaged in a Low Energy Electron Point Source microscope (LEEPS), individual freestanding nanowires were contacted with a fine metal tip as a movable electrode. By performing systematically length dependent transport measurements the contact contributions were separated from the …
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Agricultural non-point source (AGNPS) water quality modeling in a GIS environment
… database in order to undertake Agricultural Non-Point Source (AGNPS) water quality modeling. Three general areas of GIS technology were investigated consisting of technical issues involved in linking GIS; the model; database development; and a discussion of system performance from an …
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WATER QUALITY IMPACT OF NON-POINT SOURCE CONTAMINANTS IN SMALL TIDAL RIVERS
… methodology was developed for analysis of non-point contaminant production and water quality impacts in estuarine receiving waters. The methodology was calibrated against contaminant source observations and estuarine data.</p><p>Contaminant source loading is based on the runoff curve number …
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Point source dispersion in a direct numerical simulation of turbulent channel flow
The dispersion of a scalar quantity from point sources located in a Direct Numerical Simulation of turbulent channel flow is studied. An algorithm for tracking fluid particles or molecular (or thermal) markers is developed and tested. Accurate estimates of a number of Lagrangian characteristics of …
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Quantifying the Potential for Non-Point Source Pollution in Model Urban Landscapes
The contribution of non-point source pollution to degrading surface water quality is considerable throughout Virginia and beyond. While research on agricultural best management practices in nutrient management and nutrient and soil stabilization has made progress in reducing agricultural …
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Acute Toxicity and Sub-Lethal Effects of Non-Point Source Pollutants on Invertebrates
Non-point source pollution is not generated from any single source, rather can arise from a mixture of agricultural, residential, and industrial activities. As a result of these activities millions of tons of chemicals enter into aquatic environments annually with the potential to disrupt the …
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Assessing Urban Non-Point Source pollutants at the Virginia Tech Extended Dry Detention Pond
… understanding the characteristics of urban non-point source pollution has become a focus for water quality investigators. Once thought to be a small contributor to the pollution problem, urban non-point sources are now responsible for transporting over 50% of all pollutants into natural …
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GPU-based acceleration of radio interferometry point source visibility simulations in the MeqTrees framework
… a sky intensity map comprising a collection of point sources can be subjected to an inverse Fourier transform to simulate the corresponding Point Source Visibilities (PSV). Such simulated visibilities are important for testing models of external factors that affect the accuracy of observed data, …
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Response of an elastic layer over an elastic half-space to a point source.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1970.
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Assessment and prediction of surface water vulnerability from non-point source pollution in Midwestern watersheds
<p>"Non-point source pollution is the leading cause of impairment in surface water in the Midwest. In this research, we seek to predict which watersheds are most vulnerable to point source pollution without field sampling using publically available GIS databases. Watersheds with higher …
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Evaluating non-point source microplastic pollution and its impact on biota in the Huron River
… transported into waterways through a myriad of sources, including point sources such as wastewater treatment plants (WWTPs) and nonpoint sources, such as runoff. Microplastics can act as vectors for other CECs, such as non-steroidal anti-inflammatory drugs (NSAIDs), into biota. The goal of this …
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The response of a point source in a liquid layer overlying a liquid half space
The response to a harmonic point source in a liquid layer overlying a liquid half space is computed as a function of frequency. Included are the contributions form all normal modes that occur, and the branch-line integral representing the refraction arrival. The value of the refraction arrival is …
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Modeling and analysis of non-point source runoff and best management practice devices in Acton, MA
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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