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 85 for “"D-T"”.
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Dynamical equilibrium and stability of a D-T fueled fusion reactor
A point kinetics model of particle densities and temperatures within a CTR was formulated with certain assumptions. Common temperatures were assumed for ions and electrons. The number densities of each ionic species (deuterium and tritium) were equal. A divertor was employed in the reactor to …
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Neutron Resonance Transmission Analysis of Nuclear Material Using a Portable D-T Neutron Generator
The accurate identification and quantification of nuclear material is important for nuclear security, nonproliferation, and safeguards missions. Existing techniques have limitations in terms of their isotopic specificity, isotopic range, and their capacity to analyze thick or shielded targets. …
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Investigation of sub-meter shields for a low aspect ratio D-T Tokamak fusion reactor
A significant effort is being made by fusion researchers to minimize the total size of magnetic fusion devices on the path toward developing fusion energy. The spherical tokamak, which has a very low aspect ratio, is the most promising of the compact magnetic fusion reactor designs. This …
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Transient analysis of D(t)/M(t)/1 queuing system with applications to computing airport delays
This thesis is motivated by the desire to estimate air traffic delays at airports under a range of assumptions about the predictability of (a) inter-arrival times of demands (arrivals and departures) and (b) service times of aircraft movements (landings and takeoffs). It consists of two main parts. …
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Experimental Validation of the Monte Carlo-based Shielding Design of the UIUC D-T Neutron Metrology Facility
Recent developments in fusion technology enable the use of high-yield deuterium-tritium (D-T) based generators for a variety of applications related to nuclear engineering, medicine, security, and material analysis. We recently designed and set up a laboratory based on a D-T generator. The …
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Neutron activation analysis of plantinum converter and furnace mattes using a D-T sealed tube neutron generator
Neutron activation analysis (NAA) has been applied to furnace matte and converter matte samples with the objective of studying the natural variation in the elemental composition of the samples, with a view to characterize the samples for their source of origin. The experimental work was carried out …
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Epithermal neutron activation analysis of short-lived radionuclides using a pneumatic transport system and a pulsed D-T neutron generator
A pneumatic transport system for the detection and characterization of short-lived (of order 60 s or less) radionuclides produced during irradiation by a D-T neutron generator was constructed. Target samples of indium, palladium, and germanium were irradiated by the neutron generator embedded in a …
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Untersuchungen zur Rolle von CD8 bei der Aktivierung von gamma-delta-T-Zellen der Ratte
CD8 wird von thymisch gereiften a/b T Zellen als CD8ab-Heterodimer exprimiert und dient als Korezeptor bei der MHC Klasse I (MHC I) restringierten Antigenerkennung. In dieser Funktion stabilisiert CD8 die Bindung des T Zellrezeptors (TCR) an seinen Liganden (MHC I mit antigenem Peptid) und …
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Interactive media for enhancing learning and creativity in design and technology education
<p>This thesis is an exploration of the potential of interactive media to enhance learning and creativity in Design and Technology education. The work focuses on A level which is a stage at which autonomous learning becomes a significant part of the subject's pedagogy.</p> <p>This research is …
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Linear viscoelastic characteristics of Michigan asphalt mixtures and the effect of sample size on material properties
The Mechanistic-Empirical Pavement Design Guide (M-E PDG) is becoming the state-of-the-practice in both newly constructed and rehabilitated pavement designs. A number of different material inputs are required by the M-E PDG, and accurate measurement of these inputs is crucial for the accuracy of …
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Exclusive Pomeron- and Odderon induced photoproduction of omega- and f2 mesons at HERA
The topics of this thesis are the analyses of exclusive photoproduction of $omega$- and $f_{2}$-mesons at mean $gp$ centre of mass energies of $langle Wangleapprox 200$ GeV at HERA. The former process is thought to be induced by photon-Pomeron interactions, and its cross section is measured to be …
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Profiling of Relaxation Time and Diffusivity Distributions with Low Field NMR
Nuclear magnetic resonance (NMR) is a common tool utilized in core analysis. NMR can reveal important information about pore structure, fluid configuration and wettability. However, standard NMR core analysis techniques look at the sample as a whole or only at thin slices. Two NMR pulse sequences …
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Solução de um problema não linear do tipo reação-difusão na modelagem dispersão de insetos
Neste trabalho tratamos da solução de um problema não linear do tipo tração-difusão, na modelagem de dispersão de insetos. Começamos estabelecendo uma lei de conservação e a partir desta, deduzimos algumas equações importantes para o desenvolvimento do nosso estudo, tais como a equação de …
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Synthesis and utilization of guanidine catalysts for applications directed towards the preparation of butenolide and modified amino acid derivatives
Development of guanidine catalysts is explored through direct iminium chloride and amine coupling, alongside a 2-chloro-l,3-dimethyl-IH-imidazol-:-3-ium chloride (DMC) induced thiourea cyclization. Synthesized achiral catalyst N-(5Hdibenzo[ d,t][1,3]diazepin-6(7H)-ylidene)-3,5-bis(trifluoromethyl) …
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An Alpha Loss-Cone Instability in the Central Cell of a Tandem Mirror Reactor
D-T fusion-born alpha particles are mirror-confined in the central cell of a tandem mirror reactor. The resulting anisotropic loss-cone distribution of the alpha particles in velocity space is capable of destabilizing low frequency plasma waves, thus affecting the energy balance in a tandem mirror …
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Perfil do uso dos medicamentos dermocosméticos em uma farmácia magistral de João Pessoa - PB.
T h e m a s t e r f u l s e c t o r r e p r e s e n t s a n i m p o r t a n t s e g m e n t o f t h e B r a z i l i a n p h a r m a c e u t i c a l m a r k e t , i t m e d i c i n e s a r e m a d e i n d i v i d u a l l y a c c o r d i n g t o u s e r n e e d s . A m o n g t h e s e s t a n d o u t …
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Clinical and Therapeutic Significance of Obesity In Melanoma
<p>While the FDA approval of targeted and immune therapies in metastatic melanoma (MM) have dramatically improved outcomes in this disease, <em>de novo</em> and/or acquired resistance can limit the clinical benefit of these agents. The IGF-1/PI3K/AKT pathway has been implicated in resistance to …
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Measurement of neutron flux spectra in a Tungsten Benchmark by neutron foil activation method
The nuclear design of fusion devices such as ITER (International Thermonuclear Experimental Reactor), which is an experimental fusion reactor based on the "tokamak" concept, rely on the results of neutron physical calculations. These depend on the knowledge of the neutron and photon flux …
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Agitation, mixing and mass transfer in simulated high viscosity fermentation broths
Gas-liquid mass transfer, agitator power consumption, rheology, gas-liquid mixing and gas hold-up have been studied in an agitated, sparged vessel of diameter, T = 0.3 m, with a liquid capacity of 0.02 m\(^3\), unaerated liquid height = 0.3 m. The solutions of sodium carboxymethylcellulose used …
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Tokamak burn phase energy optimization with volumetric and wall interaction effects
The energy output during the burn phase will depend upon the ion temperatures and densities. The ion source rates and the plasma current can be varied to control the ion densities. The impurity concentration of the plasma can be controlled by incorporating a charged particle divertor. A dynamic …
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