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 34 for “"Cluster model"”.
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Cluster model studies of nuclei in the actinide region
Three independent techniques for obtaining core-cluster partitions of nuclei in the actinide region are found to give consistent results. As a by-product the techniques generate theoretical decay constants and energy spectra in good agreement with their experimental counterparts. The relationship …
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Cluster model investigation of nuclear spectra and electric quadrupole transitions
We review a cluster model for even-even nuclei and derive a new relation between the excitation energies and the electric quadrupole transition strengths of these nuclei. A novel method for determining the likely clustercore decompositions of a given nucleus is described, and is tested by comparing …
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Cluster-model evaluation of neutron cross selection for light-weight nuclei
Typescript (photocopy).
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Application of the algebraic binary cluster model for six nucleon systems in a translationally invariant basis /
… by using the Lambda operators to construct the model space. This approach is explored for the p-shell nuclei, particularly the bound six nucleon system. The model space is built by calculating the coefficients of fractional parentage for three-particle subclusters of the six nucleon system and …
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RUSSO-SEYMOUR-WELSH ON PERCOLATION MODELS
… for both the Voronoi percolation and random cluster model. The statements and proofs follow closely the individual work of Tassion and the joint work of Duminil-Copin and Tassion with additional remarks and details to make the proofs more accessible.
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Durability study of proton exchange membrane fuel cells via experimental investigations and mathematical modeling
… inorganic fillers. A three-dimensional "bundle-cluster" model is proposed to interpret the tensile observations, combining the concepts of elongated polymer aggregates, proton conduction channels as well as states of water. The rationale focuses on the polymer bundle rotation/interphase chain …
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Centrality dependence of two-particle number and transverse momentum correlations in 200 gev au+au collisions at rhic
… using RQMD data and data from a simple ``cluster'' model. The intent of the analysis is to analyze the role of radial flow in the onset of the ridge, and to offer canonical representations of the observables.</p>
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Is Workplace Coaching a Generic or Goal Specific Intervention? An Examination of Predictors of Goal Progress in Workplace Coaching Engagements
… factor structure as well as a coaching activity cluster model. Overall findings suggest that in practice, coaching has a tendency to be applied generically across goals rather than being tailored to each coachee’s specific needs. However, results were far from conclusive and should be explored …
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An Irreversible Thermodynamic Formalism of the Electronic Contribution to the Entropy in Metals
… and allotropic transitions with current models of the vibrational and configurational entropy. Measurements of the electronic transport properties in Cu-Ni, Fe-Ni, and Fe-Cr alloys reveal the importance of considering multicarrier transport models when interpreting electronic transport …
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Model-based Cluster Analysis Using Variables Characterizing Types of Democracy
<p> This thesis applies model-based cluster analysis to data concerning types of democracies, creating an instrument for typologies which attempt conceptual classification based on an explicit theory. We note several advantages of model-based clustering over traditional clustering methods, …
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Statistical Methods for Biological and Relational Data
… data have pose challenges for statistical modeling. For biological data, gene expression data have high-dimensionality, and T-cell receptor (TCR) data under-sample receptor populations. For relational data, there are dependencies among the observations. This thesis outlines statistical …
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Homogeneous nucleation of water vapor in inert gas atmospheres
… on the nature of the carrier gas, a molecular cluster model is assumed allowing inert gas atoms to occupy the cavities in a clathrate-like structure. The envelopment of the carrier gas atoms in these cavities results in a substantial interaction energy. The law of mass action is applied to this …
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Two body rapidity correlations in pi-p interactions at 147 GeV/c
… opposite sign correlations are consistent with a cluster model in which 2/3 of the events are generated by a model of independent w-like emission (w -> pi+pi-pi°) with an w-mass of 1.0 GeV, while the remainder of the events are generated according to a model of independent pion emission. It is …
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Studies in the electronic structure of matter
… and GaP are computed using an extended Huckel cluster model. In each case the model pre-diets two states within the band gap, in contrast to experiment which detects one impurity state in GaP and none in GaAs. It is suggested that the choice of cluster used unrealistically concentrates states …
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Alpha decay and alpha elastic scattering by heavy nuclei
A simple three parameter cluster model has previously been developed by Buck, Merchant and Perez to successfully describe alpha decay half lives for more than 400 nuclei. An important feature of this model is that it envisages preformed (preformation factor, P=1.0) alpha particles in the parent …
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Clustering phenomena from two-particle angular correlations in proton-proton and heavy ion collisions
… is interpreted in the context of an independent cluster model. The effective cluster size and its decay width are extracted from the two-particle pseudorapidity correlation function at various collision energies and multiplicities. Similar cluster like short-range structure is also observed in …
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