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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 227 for “"Scintillation"”.
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Plastic scintillation spectrometry
Plastic scintillators provide homeland security organisations with large area, low cost gamma-ray counters at international borders. Currently these detectors cannot distinguish between the sources they detect, leading to high false alarm rates during primary screening. These alarms must be …
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Multifrequency Scintillation in the Polar Caps
… in a rapid random manner in a process called scintillation. The Coherent Electromagnetic Radio Tomography (CERTO) and the Canadian High Arctic Ionospheric Network (CHAIN) are two different networks of scintillation receivers, each with a station in Resolute Bay, Canada. CERTO measures …
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Volumetric Scintillation Dosimetry For Scanned Proton Beams
… treatments by developing a fast volumetric scintillation detector. Volumetric scintillation dosimetry is a new technique with the potential to provide fast, high-resolution measurements of scanned proton beams. Initial studies using scintillation dosimetry for IMPT quality assurance have …
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Analysis of angular scintillation of radar echoes
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1952
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Multi-Constellation GNSS Scintillation at Mid-Latitudes
Scintillation of Global Positioning Systems (GPS) signals have been extensively studied at low and high latitude regions of the Earth. It has been shown in past studies that amplitude scintillation is severe at low latitudes and phase scintillation is severe at high latitudes. Unlike low and high …
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Solid-phase combinatorial chemistry and scintillation proximity assays
The Scintillation Proximity Assay (SPA) is a method that is frequently used to detect and quantify the strength of intermolecular interactions between a biological receptor and ligand molecule in aqueous media. This thesis describes the synthesis of scintillant-tagged-compounds for application in a …
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Scintillation Studies of Terbium-156 and Terbium-154
Made available in DSpace on 2015-05-12T17:12:10Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 5805429.PDF: 2963409 bytes, checksum: da71124be72edd3d2021ca52e48c9075 (MD5) Previous issue date: 1958
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Scintillation Studies of Some Neutron Deficient Isotopes of Lutecium
Made available in DSpace on 2015-05-12T17:12:10Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 5805405.PDF: 4004096 bytes, checksum: b40cd811c15d1cbf1c4283f5891bd88e (MD5) Previous issue date: 1958
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Characterization of the Multipath Environment of Ionospheric Scintillation Receivers
… and amplitude of the received signal, called scintillation. Interference of GNSS signals that are reflected and refracted from stationary objects on the ground, with signals that travel along a direct path via the ionosphere to the antenna, cause errors in the measured amplitude and phase. …
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Investigation of tritium atom exchange in plastic liquid scintillation vials
Tritium is a naturally occurring radionuclide; it is an analyte of interest in many air, soil, and water samples. It has been shown that long term storage and study of tritium samples results in a reduction in tritium activity not attributed to the natural radioactive decay. Several explanations …
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Accurate Prediction of Scintillation Degradation Applicable to Satellite Communication Systems Design
… aperture averaging and hence experience stronger scintillation. The result is random fading and enhancement in the received signal amplitude, which will have a significant impact on the performance of low-margin communication systems operating at high frequencies (> ~10GHz) and low elevation …
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Lithium and indium quinoneoximic complexes and their application in scintillation counting
… in pyridine, dimethylsulphoxlde and ethanol. The scintillation efficiency of pyridine, dimethylsulphoxide and ethanol was examined in commercially available scintillator mixtures and in scintillator mixtures developed during this study. The scintillation efficiency of the lithium complexes derived …
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Sensitivity Models for [Beta]+/EC Discovery in Large-Volume Scintillation Detectors
… experiments. We use a simulated large-volume scintillation detector modeled on the Super-Kamiokande experiment, fully implementing this detector in RAT/Geant4. This allows us to extract authentic spectra for the experimental signature of the [Beta]+/EC decay in 124Xe, paving the way for future …
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Contemporary Ionospheric Scintillation Studies: Statistics, 2D Analytical and 3D Numerical Inversion
… fluctuations of the signal, otherwise known as scintillation, which can severely impact the performance of Global Navigation Satellite System (GNSS) and communication systems. Research into high latitude scintillation, through statistical analysis and inverse modeling, was completed to provide …
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In Vivo Dosimetry Using Plastic Scintillation Detectors For External Beam Radiation Therapy
… to perform <em>in vivo</em> dosimetry. Plastic scintillation detectors (PSDs) possess a number of dosimetric characteristics advantageous for <em>in vivo </em>dosimetry including water equivalence, real-time capability, small size, and energy independence. However, PSDs have not been used for …
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A Study of the Effects of Scintillation on Digital Satellite Communication Systems
… is the severity of propagation impairments. Scintillation becomes important for low-fade margin systems operating at high frequencies and with low elevation angles and therefore must be taken into account in the design of satellite communication systems.<br/><br/>The first part of the thesis …
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