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 40 for “"multiple groups"”.
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Resolving the evolutionary history of multiple groups of freshwater mussels (Bivalvia : Unionidae).
… mussels being one of the most imperiled groups of organisms on Earth, and global collaboration is needed to understand the factors contributing to their demise. Although considerable progress has been made in understanding ecology and evolution of freshwater mussels, the biology of many …
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An Examination of the Improved Wald Test for Differential Item Functioning Detection with Multiple Groups
… items that function differentially (DIF) across groups have over time become increasingly essential for establishing validity in psychometric testing. There is a vital need for simultaneously comparing multiple groups, evidenced by the widespread proliferation of international assessments in …
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Waves of Change? Politics of Knowledge and Participation in Marine Protected Areas
… the ethnographic study in Belize illustrate that multiple groups work to produce, interpret, and contest knowledge for MPA policy, while also engaging in scalar strategies to define what MPAs are, how they should function, and who should be involved in their management. MPA success in Belize is …
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Efficient on -Demand Operations in Large-Scale Infrastructures
… the machines (e.g., CPU utilization) in one or multiple groups, (2) on-demand storage for intermediate data generated by dataflow programming paradigms running in clouds, (3) on-demand Grid scheduling that makes worker-centric scheduling decisions based on the current availability of compute …
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Nonparametric Predictive Inference for Multiple Comparisons
… Predictive Inference (NPI) for several multiple comparisons problems. We introduce NPI for comparison of multiple groups of data including right-censored observations. Different right-censoring schemes discussed are early termination of an experiment, progressive censoring and competing …
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Factors associated with variation in the fatty acid composition and iodine value of carcass fat in pigs fed increasing levels of dried distillers grains with solubles
… time [Single-group] vs. pigs taken off test in 6 groups over time [Multiple-groups]), and experimental subsample size (number of pigs/pen selected for IV measurement [2, 4, 6, 8, 10, or 12 pigs]) on fat quality composition was evaluated in a study involving 1,632 pigs. The pigs were reared under …
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A Study of Visual Attention on Gestures and Motion during Infancy
… clustering to group the trajectories into multiple groups. These groups are then analyzed to explore potential correlations between the motions of the parents and the attention of the child. The proposed tool will enable researchers to look into unknown patterns that might contribute into …
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Algal Succession and Nutrient Dynamics in Elephant Butte Reservoir
… hydrodynamics and the ability to represent multiple algal groups. Elephant Butte has been subject to large algal blooms. This study examined the phosphorus loading into the reservoir to see if it could sustain the observed algal growth. Data showed that the amount of bioavailable phosphorus …
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Stochastic and deterministic multipatch epidemic models
… of epidemics in populations that contain multiple groups that also includes interaction between subgroups. The main techniques employed are thresholds for both the deterministic and the stochastic system through an approximating multi-type branching process. We formulate a continuous time …
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SEASONAL CHANGES IN BLACK-CAPPED CHICKADEE (POECILE ATRICAPILLUS) SOCIAL STRUCTURE AND GARGLE VOCALIZATIONS
<p>Many organisms form social groups for many different reasons. Individuals within a group gain benefits from having a way of effectively communicating with their group, especially in organisms that maintain their social affiliations for long periods of time. In birds, vocalizations are the main …
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Efficient On-Demand Operations in Large-Scale Infrastructures
… the machines (e.g., CPU utilization) in one or multiple groups, 2) on-demand storage for intermediate data generated by dataflow programming paradigms running in clouds, 3) on-demand Grid scheduling that makes worker-centric scheduling decisions based on the current availability of compute …
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Evaluating Equivalence Testing Methods for Measurement Invariance
… and model parameters are similar across multiple groups. The statistical methods used by most researchers for testing MI is by conducting multiple group confirmatory factor analysis models, whereby a statistically nonsignificant results in a chi square difference test or a small change in …
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ONE DISTRICT’S STAKEHOLDERS’ DESCRIPTIONS OF THE SUPPORTS AND BARRIERS IMPACTING THE USE OF A DIGITAL MATHEMATICS CURRICULUM
… the experiences of various stakeholder groups at a suburban middle school that has used a digital mathematics curriculum for the last two school years. Using an interview protocol, two administrators, five teachers, 10 students, and 15 parents were interviewed about their experience …
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Refinement and Applications of Light Controlled Biological Processes
… be turned on/off using an external light source. Multiple groups have worked on controlling cellular processes using photo-caged biomolecules. In this dissertation work, several approaches to control biological processes using caged molecules are described. In addition, applications and refinement …
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On testing common indices for several multi-index models: A link-free approach
… are being measured on objects from different groups, and we would like to know how similar the groups are with respect to some set of overall features. Common PCA and partial dimension reduction methods are extant methods for multiple groups. Note however that common PCA is unsupervised and …
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Coding techniques for multicasting
… study the scenario in which one transmitter with multiple antennas distributes a common message to a large number of users. For a system with a fixed number (L) of transmit antennas, we show that, as the number of users (K) becomes large, the rate of the worst user decreases as O(K-(1/L)). Thus …
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Factors Affecting Knowledge Sharing in Virtual Learning Teams (VLTs) in Distance Education
… Next, the study cross-validated the model with multiple groups drawn from the same sample. The sample consisted of data from 1,374 participants matriculated in graduate and undergraduate programs at an online university. The data were analyzed using split sample methodology, multiple regression …
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Bayes Multiple Decision Functions: Theory, Computation and Application
… Through this Bayesian paradigm, the Bayes multiple decision function (BMDF) is derived and an efficient algorithm to obtain the optimal Bayes action is described. In contrast to many works in the literature where the rows of the matrix X are assumed to be stochastically independent, we …
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Testing Measurement Invariance in Multilevel Data with Unequal Cross-Level Factor Structures
… a construct in the same way across different groups or over times. Examining MI is a prerequisite for multiple group comparisons in psychological tests (Schmitt & Kuljanin, 2008). With the prevalence of multilevel data in educational research (e.g., students nested within schools), …
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A holistic approach to finished goods inventory in a global supply chain : analysis and trade-offs
… decisions often have implications across multiple groups in a corporation. Decisions such as how many locations in which to hold inventory, where to hold inventory, how to fulfill that inventory, and at what service level cannot be made independently as they often influence each other and …
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