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 66 for “"group structure"”.
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Equivariant estimators and a special group structure
Given a G-invariant family of distributions and under suitable hypotheses concerning G, we characterize the form of G-equivariant estimators. In fact, corresponding to each G-equivariant estimator is an appropriate G-invariant function and conversely. In the course of characterizing the …
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Group size, group structure and student interaction in children's computer learning
… skills was examined in relation to group size. Also analyzed were students’ interaction in small groups and the structure of those groups. Sixty-six second-grade students in solo, pair, or triad treatment conditions were given a pretest and equivalent-form posttest. The computer task …
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Essays on Group Heterogeneity in Panel Data Models
The assumption of group heterogeneity has become popular in panel data models. Instead of modeling heterogeneity via unit-specific coefficients, the cross-sectional units are assumed to cluster into groups, and within each group, units share the same coefficients. This thesis develops an …
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Remedying abuses of limited liability in company groups
In the modern world, company groups have become a commercial reality. With increasing regulatory and compliance requirements for different industries, larger companies are often more optimally managed in a group structure. The individual companies within a group structure still operate in the …
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Some applications of lie transformation groups to classical Hamiltonian dynamics
Recent work has established that a group theoretical viewpoint of completely integrable dynamical systems with N degrees of freedom yields an algorithm that provides new information concerning the symmetry transformation group structure of this class of dynamical systems. The work presented here …
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Quintic Abelian Fields
… in terms of their conductor and a certain Galois group. From these, a generating polynomial and its roots and an integral basis are computed. A method for finding the fundamental units, regulators and class numbers is then developed. Tables listing the coefficients of a generating polynomial, the …
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Homotopy mapping spaces
<p>In algebraic topology, one studies the group structure of sets of homotopy classes of maps (such as the homotopy groups pin( X)) to obtain information about the spaces in question. It is also possible to place natural topologies on these groups that remember local properties ignored by the …
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The Interdependence of Scientists in the Era of Team Science: An Exploratory Study Using Temporal Network Analysis
… team science and the emergence of the research group as the fundamental unit of organization of science affecting scientists’ opportunities to collaborate? Are the majority of scientists becoming dependent on a select subset of their peers to organize the intergroup collaborations that are …
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Building communities through communication: Understanding community development success and failure using a narrative approach
… communication efforts of community development groups to provide a richer understanding of the indicators of group success or failure in this context. The subjects are participants of the Indiana HomeTown Competitiveness program, an initiative that seeks to develop local economic capacity to …
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Invariant estimation with application to linear models
… in this dissertation relies on defining a group of transformations on the sample space such that i) the group structure is isomorphic to the parameter space and"carries" the estimation problem in a natural manner (thus defining an “carries” the estimation problem), and ii) the group …
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Canonical Variate Analysis and Related Methods with Longitudinal Data
… (CVA) is a widely used method for analyzing group structure in multivariate data. It is mathematically equivalent to a one-way multivariate analysis of variance and often goes by the name of canonical discriminant analysis. Change over time is a central feature of many phenomena of interest …
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A Geometric Model for Real and Complex Differential K-theory
… of the spectra and use them to define an abelian group structure on maps up to an equivalence relation that refines homotopy. Finally we define the differential K-theory functors and verify the axioms of Bunke-Schick for a differential cohomology theory.</p>
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Understanding serious organised crime: the view of law enforcement personnel in Scotland
… crime in terms of its history, definition, group structure, violence and its capacity for corruption. While the focus of the work is on organised crime groups operating in Scotland, organised crime is a global phenomenon consequently, the research draws upon both national and international …
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Group transformation and identification with kernel methods and big data mixed logistic regression
… setting.</p> <p>First, we propose to use optimal group transformations as a general approach for exploring the relationship between predictor variables <em>X</em> and the response <em>Y</em>. This approach can be considered an automatic procedure to identify the best characteristic of …
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Lipschitz and Holder mappings into jet space Carnot groups
… in $C^k(\R^n)$. Warhurst constructs a Carnot group structure on $J^k(\R^n)$ such that the jets of functions in $C^{k+1}(\R^n)$ are horizontal. Like in all Carnot groups, one can define a Carnot-Carath\'eodory metric on $J^k(\R^n)$ by minimizing lengths of horizontal paths. Unfortunately, exact …
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