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.
Results
Showing 1 to 20 of 90 for “"multi-group"”.
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A Multi-Group Public Goods Game Experiment
<p>People belong to many different groups, and few belong to the same network of groups. Moreover, people routinely reduce their involvement in dysfunctional groups while increasing involvement in those they find more attractive. The net effect can be an increase in overall cooperation and the …
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Cyclotron Radiation by a Multi-Group Method
Cyclotron radiation is a serious energy loss mechanism in fusion reactors using magnetic confinement. It plays an important role in the energy-balance of the whole reactor system.
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Efficient design of reconfigurable intelligent surface assisted multi-group multicast beamforming
This thesis considers a multi-group multicasting scenario facilitated by a reconfigurable intelligent surface (RIS). We propose low-complexity scalable algorithms for the joint design of the base station (BS) multicast beamformer and the RIS passive beamformer to minimize the transmit power subject …
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Three dimensional heterogeneous finite element method for static multi-group neutron diffusion
… current full-core neutronic-calculations use two-group neutron diffusion and rely on homogenizing fuel assemblies, reconstructing pin powers from such a calculation is an elaborate and not very accurate process; one which becomes more difficult with increased core heterogeneity. A …
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Structure-based learning via graph neural networks for multi-group multicast beamforming
In this thesis, we consider a downlink multi-antenna multi-group multicasting problem, where users in the same group request the same content. Even though existing optimization-based algorithms can obtain a sub-optimal multicast beamforming solution, they are designed under perfect channel state …
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Multi-scale and multi-group modeling techniques applied to Cholera and COVID-19
… risk factors from all the individual host groups. These multi-patch techniques are used to present a model of the United States outbreak of COVID-19 during the summer of 2020. The existence and uniqueness of a DFE (Disease Free Equilibrium) are discussed in light of the number R0, when …
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Robust multi-group multicast beamforming design and antenna selection for massive MIMO systems
… we use an Alternating Direction Method of Multipliers (ADMM) algorithm to design robust multi-group multicast beamforming scheme for massive multiple-input multiple-output (MIMO) systems for two scenarios; 1) all antennas are available at the base station (BS), 2) only subset of antennas …
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Optimal structure and efficient algorithm for max-min fair multi-group multicast beamforming
… this thesis, we consider the max-min fair (MMF) multi-group multicast beamforming design to maximize the minimum signal-to-interference-plus-noise ratio (SINR) subject to transmit power limit. We obtain the optimal multicast beamforming solution structure for an arbitrary system configuration. We …
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Reactor agnostic multi-group cross section generation for fine-mesh deterministic neutron transport simulations
… full-core transport methods is reactor agnostic multi-group cross section (MGXS) generation. Monte Carlo (MC) presents the most accurate method for MGXS generation since it does not require any approximations to the neutron flux. This thesis develops novel methods that use MC to generate the …
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Construct Validation of an Integrated -Approach EAP Placement Test Using Multi -Group Structural Equation Modeling
The research questions were tested using multi-trait multi-method (MTMM) procedures and multi-group structural equation modeling (MSEM) as the central statistical tool. A review of the statistical methodology of the MTMM procedures as a methodological contribution in literature preceded an …
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Cumulative migration method for computing multi-group transport cross sections and diffusion coefficients with Monte Carlo calculations
… and efficient operation of nuclear power plants. Multi-group diffusion coefficients and transport cross sections are the crucial parameters that balance efficiency and accuracy in full-core simulations. However, it is not clear what definition of diffusion coefficients and transport cross sections …
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Variable Fidelity Monte Carlo Neutron Transport: On Combining Multi-Group and Continuous Energy Representation in Monte Carlo Calculations
… Carlo (MC) neutronic calculations that combine multi-group (MG) and continuous energy (CE) representation of nuclear interaction data in different spatial regions. In general, MG MC calculations run 3-4 times faster than CE MC. Thus, it might be possible to reduce the calculation time without …
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The Impacts of Culture on Cross-Border Mergers and Acquisitions Post-Financial Performance in the Banking Industry using Multi-Group Structural Equation Modeling
… project. It perceives the national culture as a multi-dimensional construct that interacts between levels. The thesis consists of a mixed methods approach which investigated international mergers and acquisitions by banks in Egypt and the UK from 2004 to 2007. The data collection process was …
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Location based authenticated multi-services group key management for cyber security in high speed broadband wireless multicast communications. Multi-service group key management scheme with location based handover authentication for multi-handoffs participating in multi-group service subscriptions, its performance evaluation and security correctness in high speed broadband wireless multicast communications
… Accordingly, with the proliferation of diverse multicast group service subscriptions that are possible to co-exist within a single broadband network, there is also huge demand by the mobile subscribers to ubiquitously access these services over high speed broadband using their portable devices. …
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Efficient gene set analysis of high-throughput data : From omics to pathway architecture of health and disease
… of an advanced permutation method for GSA of multi-group gene expression data with fewer replicates; and (3) implementation of the developed methods for the identification of novel smoking induced epigenetic signatures at biological pathway level. Materials and methods: The first study …
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Analyzing Cholera Dynamics in Homogeneous and Heterogeneous Environments
… of this model. Next, we propose a general multi-group model for cholera dynamics that incorporates spatial heterogeneity and dispersal. Under biologically feasible conditions, we show that the basic reproduction number [special characters omitted]0 remains a sharp threshold for cholera …
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A Causal Analysis of Achievement Models for Language Minority Students in the United States: A Linear Structural Relations (Lisrel) Approach
… and psychological orientation. An unbalanced, multi-group sample was randomly selected from the 1980 High School and Beyond national database. A total of 739 public high school sophomores with complete responses were sampled from three ethnic populations: Asian, Hispanic, and Anglo.
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Factors Explaining EFL Learners' Performance in a Timed Essay Writing Test: A Structural Equation Modeling Approach
… L2 writing performance. Further, a simultaneous multi-group SEM with high and low- L2 writing ability groups indicated that L2 writing performance was explained by the full model to a different degree for each group as well as to a different manner across the groups. Based on these findings, …
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Markovian and stochastic differential equation based approaches to computer virus propagation dynamics and some models for survival distributions
… possibly important factor in virus propagation, multi-group stochastic SEIR models for the spreading of computer virus in heterogeneous networks are explored next. For the multi-group stochastic SEIR model using Markovian approach, the method of maximum likelihood estimation for model parameters …
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