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 52 for “"thermal analyses"”.
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Criticality and thermal analyses of separated actinides in transmutation
Curium and americium pose special problems in the chemical preparation of spent nuclear fuel for transmutation. Once separated from the other minor actinides, the isotopes can lead to nuclear fission with the subsequent release of a large amount of radiation. A neutron criticality code was used to …
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Structures and thermal analyses of Werner clathrates and coordination polymers
… In addition, all compounds were characterised by thermal analysis techniques, including differential scanning calorimetry, thermogravimetry and hot-stage microscopy.
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A review and application of the Hadron gas model to heavy ion collisions
… collision system at freeze-out. Conclusions of thermal and chemical equilibrium at freeze-out are drawn from an analysis of the data of Si-Au collisions at BNL-AGS, and compared with the literature on thermal analyses of Si-Au collisions.
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Structural and thermal design of a dual-rotor constant-frequency, variable-speed generator
… on the mechanical design. Structural and thermal analyses of the design have been performed, and the design thereby specified to the point that a prototype can be constructed for testing.
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Nanostructured hybrid organic/inorganic materials by the nanobuilding blocks (NBB) approach
… NMR spectroscopies, SEM, N2 physisorption, Thermal analyses (TG/DTA), DSC. NBBs were used to prepare methacrylate-based matrices, which were subsequently exploited in order to produce patternable films by the two photon polymerisation technique (TPP). Epoxy-based matrices were also prepared …
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Assessment of Thermal Behavior and Development of Thermal Design Guidelines for Integrated Power Electronics Modules
… To address the issue of overheating, thermal management becomes an important mission in the design of the power electronics to ensure the functional power electronics. Different approaches are taken by academia and industry researchers to provide efficient power electronics. In …
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A Heat Transfer Modeling Study of Rail Thermite Welding
… the thermite welding process. The results of the thermal analyses were correlated to the development of various weld defects and compared with measurements performed on laboratory thermite welds. The effects of welding parameters on weld defect development were explored through a series of thermal …
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Integrated EMI/Thermal Design for Switching Power Supplies
… presents the modeling and analysis of EMI and thermal performance for switch power supply by using the CAD tools. The methodology and design guidelines are developed. By using a boost PFC circuit as an example, an equivalent circuit model is built for EMI noise prediction and analysis. The …
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A study of copper thick film conductor adhesion mechanisms on ceramic substrates
… (SEM) techniques. X-ray diffraction and thermal analyses (TMA and TGA) techniques were used to analyze the ink additives.
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Thermal Control Design and Analysis of the Optical Telescope of an Earth Observing Satellite
… telescope on an Earth observing satellite, the thermal stability is of vital importance to ensure optimal performance. During orbital operation in space, the nonsymmetrical distribution of temperature and high temperature variations on the telescope structure result in thermal deformation, which …
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Experimental Validation of Indirect Liquid Cooling Computational Thermal Modeling
… offers a modular and lightweight approach to thermal management. As part of development for the Navy’s integrated Power and Energy Corridor (NiPEC), multiple computational thermal analyses of this cooling method have been conducted but not yet tested against experimental results. NiPEC …
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Carboxymethylcellulose Acetate Butyrate Water-Dispersions as Renewable Wood Adhesives
… as renewable wood adhesives. Neat polymer analyses revealed that the apart from MW, the CMCAB systems had different acid values, and that the high MW system was compromised with gel particle contaminants. Formulation of the polymer into water-dispersions was optimized for this study, and …
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Electrospinning of biphasic biopolymer and polymer : a feasibility and characterization study
… promise in producing excellent fiber mats. When thermal analyses are performed the results indicated rapid densification and reorientation of PLLA. This is determined to be interactions that are occurring between collagen and PLLA resulting in rapid enthalpic recovery of PLLA.
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The preparation and characterization of stannous fluoride materials containing strontium
… infrared spectroscopy, X-ray diffraction, thermal analyses and Mossbauer spectroscopy. Recrystallization of SrSn$\sb2$F$\sb{6\cdot}$H$\sb2$O and Sr$\sb2$Sn$\sb2$NO$\sb3$F$\sb{7\cdot}$2H$\sb2$O from nitric acid was performed in primarily an effort to obtain single crystals that could be used …
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Structural studies of supramolecular host-guest systems
… The NMR studies were complemented using FT-IR, thermal analyses (DSC, and TGA), and powder X-ray diffraction (PXRD). Evidence for the formation of host-guest inclusion compounds (ICs) was provided using CP/MAS solids NMR spectroscopy and complexation-induced chemical shift (CIS) values of 1H/19F …
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Modeling Arthropod Traits in a Bayesian Framework
… have been able to model this relationship using thermal performance curves (TPCs), or curves that quantify how an organism's performance changes as a function of temperature. However, most thermal analyses have focused on finding the ``best" TPC equation, often overlooking other key …
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Assessment of Infrared Thermography for NDE of FRP Bridge Decks
… to concentrations of heat. These variations in thermal propagation patterns are observed by the infrared camera and indicate possible structural deficiencies. Results of experimentation and thermal analyses from laboratory studies of a model bridge deck and some from in situ full-scale …
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Study of the thermal behaviours of intumescent silicate materials
… silicate based materials were characterised by Thermal, Infrared (IR), Karl Fischer (KF), Mass Spectrometry (MS) and Cone Calorimetry (CC) techniques. Scanning Electron Microscopy (SEM) was also employed to study the sample morphologies. In this study, spectral data were analysed by multivariate …
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The enclathration of alcohols by cholic acid
… during crystallization. Single crystal structure analyses were performed by X-ray diffraction. Two types of molecular packing were identified. Cholic acid inclusion compounds with methanol, ethanol and 1-propanol are characterized by a 3-D host and guest molecule network stabilized by hydrogen …
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Investigation of the thermodynamics of iron phosphate melts and stability of iron phosphate glasses: effects of composition and iron redox ratio
… altering batch compositions and melt conditions. Thermal analyses indicate polyphosphate glasses with intermediate chain lengths are most stable against devitrification. Heterogeneous crystallization occurs on the glass surface and is dependent on iron valence state, particle size, heating rate, …
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