Global ETD Search
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 188 for “"GEM"”.
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Lehrer(innen) (gem)einsam?
… auf die Ressourcen, die durch Beziehungsmanagement erschlossen werden können sowie drittens in Form von kollektivem Sozialkapital auf soziale Ressourcen, die innerhalb des Systems kollektiv verfügbar sind. Ergänzend dazu werden zwei Arten kollektiver Ressourcen berücksichtigt, die weitgehend …
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Resolution studies of a GEM-based TPC
… (Micromegas) and Gas Electron Multiplier foils (GEMs). The current thesis shows resolution studies with a TPC prototype equipped with a triple GEM readout structure. A hodoscope made up of silicon strip sensors gives a precision reference track, allowing an unbiased measurement of the spatial …
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The reactions of gem-dihalocyclopropanes with organometallic reagents
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1964
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Ion backdrift minimisation in a GEM-based TPC readout
… devices, for example Gas Electron Multipliers (GEMs), is studied as an alternative to wires. GEM foils promise a higher spatial resolution and an intrinsic suppression of the ions produced during gas amplification. Ions drifting back into the TPC's sensitive volume would lead to a space charge …
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Development and Testing of a Gallium Electromagnetic (GEM) Thruster
"An ablative, quasi-steady electromagnetic plasma accelerator is tested to quantify various characteristics of its operation. An array of diagnostics are used to characterize a gallium plasma produced by an arc discharge with current levels in the range of 5.6 - 22.6 kA. Discharge current and arc …
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Thermal testing of the STAR forward GEM tracker disks
In my thesis project, I worked on the Thermal Model for the FGT detector. The purpose of this thermal model is to simulate the cooling system for the electronics of the FGT. In this thesis report, I go over the construction of the model disks for the thermal model and the measurements I made on one …
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Test and characterization of a new triple-GEM detector
… testing, and characterization of several triple-GEM (Gas-Electron Multiplier) prototype detectors. GEM detectors represent one of the latest developments in a new style of gaseous particle detectors. They have become well-known and widely used. Improvements in foil production are important for …
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Decarboxylative Transformations Facilitated via Intermolecular Halogen Transposition using gem-Bromonitroalkanes
… with intermolecular halogen transposition using gem-bromonitroalkanes. A systematic investigation of this novel synthetic framework enabled mild, green, and efficient conversion of carboxylic acids into electron-deficient styrenes, enamides, and β-nitroamines.
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Edward Taylor's "brightest gem" : a religio-aesthetic explication of Gods determinations
This study examines intensively Edward Taylor's Gods Determinations touching his Elect: and The Elects Combat in their Conversion, and Coming up to God in Christ together with the Comfortable Effects thereof. This poetic history was probably written immediately prior to one of Taylor's spiritual …
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Investigation of the GEM MPD thruster using the MACH2 magnetohydrodynamics code
… work on the gallium electromagnetic (GEM) thruster. MACH2 was also used to examine possible changes to the GEM thruster that could improve the performance of the actual thruster. Thruster radius ratios of 3.4 and 5 were examined, and a mass flow rate of 6 g/s was specified for each. In …
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An Overview of Tourmaline Mineralogy from Gem Tourmaline Producing Pegmatite Districts in Africa
Suites of gem-quality faceted tourmaline, slices and fragments from Nigeria Namibia, Mali, Tanzania, Congo and Mozambique were quantitatively analyzed to determine mineralogy and minor elementChemistry. The specimens range in color from colorless to pink, red, yellowish-brown, green, bluish-gray, …
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GEM, generalized estuary model: a variation on the Schofield- Krutchkoff stochastic model for estuaries
In recent years, many mathematical models have been developed to be used as mechanisms for carrying out stream and estuary investigations. In 1971, W.R. Schofield and R.G. Krutchkoff completed work on a stochastic model in an attempt to accurately describe the behavior of an estuary. Through the …
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Fluid inclusion and trace element studies of the gem pegmatites of Mt. Antero, Colorado
The gem pegmatites of Mt. Antero, Colorado occur in an Oligocene granitic stock containing aquamarine, smoky, clear and milky quartz, phenakite, muscovite, fluorite, garnet, pyrite, topaz and calcite. Aquamarine and smoky quartz contain abundant primary fluid inclusions outlining growth zones, as …
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Optimization of a GEM-based detector to measure tritium and discriminate against other radiation types
… human body when ingested, inhaled or absorbed. GEM detectors have proven to be very useful in the detection of low energy ionizing radiation, with their ability to multiply electrons via avalanches and amplify the signal thereby increasing the ease of detection. This work aims to optimize the …
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Triple-GEM tracker and HCAL-J: two detectors for the study of Nucleon Form Factors at Jefferson Lab.
… has focused on two key detectors of SBS: the GEM (Gas Electron Multiplier) based Front Tracker and the HCAL-J segmented hadron calorimeter. The latter is devoted mainly to provide the main trigger in the hadron arm, as well as the particles energy, the neutral pion identification and a course …
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Pragmatic theory applied to Christian mission in Africa: with special reference to Luo responses to ‘bad’ in Gem, Kenya
Linguistic research showing dependence on context in deriving language meaning discloses the integral linking of the Luo language with their departed ancestors and the upholding of customary laws. Meaning and impact being transformed in the process of translation from one context to another …
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Reviving Heritage in a Historic Gem City: Examining the Management of History at the Colonial Quarter in St. Augustine, Florida
… St. Augustine’s colonial history. Over time, management of the site has fallen under the purview of the state of Florida, the city of St. Augustine, and the University of Florida Historic St. Augustine (UFHSA) Direct Support Organization, which functions as a managing agency for the state. In …
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