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 91 for “"FOM"”.
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Success Against the Odds: The Experience of At-Risk Students Who Graduate Fom Postseconday Institutions
Over the years, dramatic changes in retention and attrition rates have given rise to extensive studies on the academically at-risk college student (Nisbet, Ruble, and Schurr 1982; Levin and Levin, 1991, White & Salacek, 1986). Yet, most of these studies have focused on statistical measures …
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Device Selection Criteria--Based on Loss Modeling and Figure of Merit
… a prevalent criterion, the Figure-of-Merit (FOM), is being widely adopted for determining the top switch of the buck converter in the VR/VRM. By comparing the FOMs of different devices, the device with the lowest FOM value should have the best performance and lead to the lowest loss for this …
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Optimal reservoir management using adaptive reduced-order models
… to accurately reproduce the full-order model (FOM) input/output behavior. POD allows for a concise representation of the FOM in terms of relatively few variables while TBR improves the overall stability and accuracy. DEIM improves the shortcomings of POD and TBR in the case of nonlinear PDEs, …
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Interface-Tracking by the Face-Offsetting Method for Martensitic Transformation Simulations
… scheme called the face-offsetting method (FOM) In explicitly model phase interfaces. Results not only demonstrate the effectiveness of the FOM for resolving lenticular twinned microstructure with cusp-like tips but also question (a) the applicability of level-set methods for the simulation …
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Methods for optimization of the signature-based radiation scanning approach for detection of nitrogen-rich explosives
… procedure that produces a figure-of-merit (FOM) whose value is used to distinguish between inert and explosive materials. The present study develops a tiered-filter implementation of the signature-based radiation scanning technique, which reduces the number of templates needed. This approach …
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Super-high-frequency lithium niobate microelectromechanical system resonators
… resonances at SHF, and high figure of merit (FOM) for minimal insertion loss and enhanced out-of-band rejection. This thesis reports on the demonstration of a new class of SHF microelectromechanical system (MEMS) resonators operating in the 5 GHz range. The SHF resonances have been achieved by …
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Cross-Validation of Data-Driven Correction Reduced Order Modeling
… as ROM projection) to the full order model (FOM) and construct the filtered ROM (F-ROM). (2) We use data-driven modeling to model the nonlinear interactions between resolved and unresolved modes, which solves the F-ROM's closure problem. In the DDC-ROM, a linear or quadratic ansatz is used in …
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Generalized finite element methods for three-dimensional crack growth simulations
… an extension of the Face Offsetting Method (FOM). Based on the hp-GFEM solution, the FOM provides geometrically feasible crack front descriptions by updating the vertex positions and checking for self-intersections of the edges. The hp-GFEM with FOM allows the simulation of arbitrary crack …
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Successive-approximation-register based quantizer design for high-speed delta-sigma modulators
… ADC achieves SNR of 24.3 dB, figure-of-merit (FoM) of 638 fJ/conversion-step and 42.6 mW power consumption, while the 8-bit SAR ADC achieves SNR of 41.5 dB, FoM of 191 fJ/conversion-step and 92.8 mW power consumption. High-speed operation is achieved by optimizing the critical path in the SAR …
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Numerical Modelling of Plasmonic Waveguides
… mode radius 3db- addition, the figure of merit (FOM), defined as the ratio between propagation length and lateral mode radius, is also studied. The analysis is performed for different channel plasmon polariton (CPP) waveguides; trenched-groove. V-groove and the suggested three trenched structure …
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Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces
… were further screened using a figure of merit (FOM) analysis. Some of the fluids/additives that have been identified after the FOM analysis include C₄H₅F₃O, C₄H₄F₆O, C₆H₁₁F₃, C₄ H₁₂O₂Si, methanol, and ethoxybutane. The heat transfer performance of these new fluids/fluid mixtures was analyzed …
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Globalization of R&D in the automotive industry : applying current knowledge to a Mexico case study
… that in order to increase Ford of Mexico's (FoM) ability to contribute to innovation efforts to the company globally, it is recommended to have a small group of dedicated people to oversee and manage a portfolio of R&D projects in 4 areas of opportunity: * Process innovations including …
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Compact Femtosecond Lasers for Multiphoton Imaging
… laser for MPI applications is a figure of merit (FOM) approach based on peak power and average power of the particular excitation laser used. The first systematic studies of FOM for two-photon imaging within 336fs – 3.5 ps pulse duration range and repetition rate from 2.85 MHz to 90 MHz at 1 …
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Low-power high-performance SAR ADC with redundancy and digital background calibration
… is 2.1mW, corresponding to 21.9fJ/conv.- step FoM. This ADC achieves the best FoM of any ADCs with greater than 10b ENOB and 10MS/s sampling rate.
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Design and Additive Manufacturing of Carbon-Fiber Reinforced Polymer Microlattice with High Stiffness and High Damping
… damping in terms of a figure of merit (FOM), E1/3tanδ/ρ, can be enhanced by a small addition of a high loss phase in Reuss configuration. Moreover, it is seen that structural damping is improved at low relative densities due to the presence of elastic buckling during deformation. For …
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Model reduction for nonlinear dynamical systems with parametric uncertainties
… (ROM) is independent of the full-order model (FOM) dimension. In problems where vastly different magnitudes exist in the unknowns variables, the original POD-DEIM approach results in large error in the smaller variables. In unsteady simulations, such error quickly accumulates over time, …
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Reduced-order modeling and adjoint-based optimization of flows with fluid-structure interactions
… The non-cylindrical enabled full-order model (FOM) based adjoint approach has been used for all cases, while the adjoint-ROM developed in the present work has been used for 2D weak gust mitigation only. The mitigation of gust has been realized by minimizing a well-designed objective function to …
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Fiber Orientation Modeling: a Method to Improve Quantitation of Intramyocellular Lipids in Human Subjects at 7 Tesla
… approach, named Fiber Orientation Modeling (FOM) by using the bulk susceptibility effect theory to accurately assess the lineshape of EMCL. METHODS: The distribution of EMCL strand orientation at any angle from 0 degrees to 90 degrees relative to Bo was described by a Gaussian function, …
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A comparative study evaluating the performance of diagnostic radiography units and protocols for paediatric and adult chest radiography examinations
… of public hospitals. Method: A Figure of Merit (FOM) concept was used for the purposes of comparing IQ and radiation dose, between and within hospitals. Low contrast detail (LCD) detectability, using the CDRAD 2.0 phantom, was utilised as the main method for IQ evaluation. The validity of …
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Reconfigurable Photonics based on Broadband Low-loss Optical Phase Change Materials
… an unprecedented material figure of merit (FOM) over two orders of magnitude larger than that of classical GST alloys, benefiting from blue-shifted interband transitions as well as minimal free carrier absorptions, as confirmed by Hall measurements. In-situ heating TEM and XRD measurements …
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