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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
441

Investigating the validity of the conditional reasoning test for leadership

Wright, Mary Ann 21 November 2011 (has links)
Several decades of leadership research have failed to yield a personality measure that accurately predicts successful leaders (Bernus&Manis, 1985; Stogdill, 1974; Vroom&Yago, 2007; Yukl, 1989). A new implicit measure of personality, the Conditional Reasoning Test for Leadership (CRT-L), shows promise in this endeavor. This project investigated the construct and criterion-related validities of this measure. Previous research on implicit personality measures, and specifically conditional reasoning measures, has demonstrated that their relationship to their explicit measure counterparts tends to be modest or nonexistent. This was the case for the CRT-L, which had no relationship to the NEO Hostility Scale or the Motivation to Lead (MTL) Scale. As expected, the two explicit measures did have a significant and positive relationship (r = .42). The CRT-L was also effective at predicting leadership and power criteria. It had positive and significant relationships with Leadership Peer Nominations (r = .25) and Power Peer Nominations (r = .21) and was more successful in these predictions than either of the explicit measures. The results of this research provide evidence for the effectiveness of the CRT-L as a leadership measure and further validation work is encouraged.
442

Lärares fostran av elever. En empirisk studie av lärares vägar till fostran / Teachers Moral Education. An Emphirical Study of Teachers´ Ways to Moral

Wynnersjö, Therese January 2001 (has links)
<p>Syftet med studien är att belysa åtta lärares vägar till fostran av elever i klassrummet. I bakgrunden finns, förutom en kort inledning om mitt intresse för analyserat område en begreppsutredning där jag definierar för studien centrala begrepp. I litteraturdelen presenteras både normativ och deskriptiv litteratur då tidigare emprisk forskning finns i begränsad mängd. De refererade källorna är av både äldre och nyare karaktär. </p><p>Aktuella variabler i urvalet är lärares kön, undervisningsstadium, antal år i yrket och skolans upptagningsområde (status och typ av bebyggelse). </p><p>Datainsamlingen har skett med en etnografisk metod där observationer, informella intervjuer och formella intervjuer har följt varandra. Analysen har skett med hjälp av procedurer som hämtats från grounded theoryansatsen där kodning och kategorisering av data har följt metodens mönster. De kategorier som växt fram är ett steg på vägen till en teorigenerering. Resultatet visar att det finns två huvudkategorier då det gäller lärares vägar till fostran, explicit och implicit påverkan. Explicit påverkan sker i form av värderingsöverföring och negativ och positiv förstärkning. Implicit påverkan sker med hjälp av det sociala klimatet, arbetssättet och materiella miljön. Studien visar att lärare är personliga i sin fostran av elever och att de fostrar på både ett medvetet och ett omedvetet sätt. Studien bekräftar annars den refererade litteraturen vad gäller lärares vägar till fostran av elever i klassrummet.</p>
443

Analysmetoder för rörsystem / Methods for pipe system analysis

Holmberg, Erik January 2008 (has links)
<p>The purpose of this thesis work is to evaluate how the physical behaviour of a pipe bend is affected by the pipe bending procedure. Effects such as initial ovalization, thinning, thickening and plastic hardening from the bending procedure are examined and the mechanical properties of pipe bends containing these effects are investigated.</p><p>This has been evaluated by creating a detailed Finite Element model of a pipe that is being bent. Then the differences compared to a bent tube in a virgin state, so called Elbow elements and an analytical in-house program have been evaluated. The virgin state refers to a model of a pipe that is bent from the beginning, thus having a homogeneous thickness and not containing any plastic hardening. The Elbow element is a calculationally cheap element, specially developed for accurate calculations of pipe bends in an initially virgin state.</p><p>The goal with the thesis work is to get a better picture of what happens to a pipe as it is being bent, how this affects the mechanical properties and to evaluate the possibility to develop an easy method for taking these effects into account when using the Elbow element.</p><p>This report describes the layout of the work and how the detailed FE-model has been constructed. One step to being able to use the Elbow element with respect to changes in shape and plastic hardening from the manufacturing process has been presented, the differences are though considered being too big to be able to use the Elbow elements with enough confidence in the results. The problems that remain are presented and discussed and proposals for further work are presented.</p>
444

Implicit solid modeling using interval methods /

Chang, Jen-Chien Jack. January 2000 (has links)
Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 77-80).
445

A new tool for measuring individual differences in conceptual structure

Gagliardi, Emilio Garnet. January 2010 (has links)
Thesis (M. Sc.) -- University of Alberta, 2010. / "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science, Psychology, University of Alberta." Title from pdf file main screen (viewed on January 5, 2010). Includes bibliographical references.
446

Social Situations and Alcohol: The Effect of Social Context on Alcohol Expectancies

Ariel, Idan 01 January 2012 (has links)
Alcohol is one of the most widely used recreational drugs in the United States today, despite being associated with a myriad of negative effects. Alcohol consumption occurs most frequently within social contexts, and seems to be strongly related to many social factors. It is known that an individual's expectations of the effects of alcohol influences his/her drinking behavior, and that social alcohol expectancies are some of the most frequently reported expectancies. In this study, we explored the relationship between alcohol expectancies and social influences by examining whether exposure to a social context would differentially activate alcohol expectancies. 115 young-adult male participants were exposed to either a social context or a control condition. Subsequently, participants' alcohol expectancies were assessed using both explicit and implicit measurements. Differences between conditions were found on the implicit expectancy measure (a free association task) but not on the explicit expectancy measures. Results from the free association task indicated that participants who were exposed to a social context were more likely to report positive and arousing words in response to the prompt "alcohol makes me _______". These differences suggest that exposure to a social context may not overtly change individuals' alcohol expectancies, but may increase the availability of positive and arousing alcohol expectancies. This increase in availability of positive and arousing expectancies may explain one of the mechanisms involved in deciding to engage in social drinking.
447

Expatriates' Acculturation Strategies: Going Beyond "How Adjusted Are You?" To "How Do You Adjust?"

Lineberry, Matthew 01 January 2012 (has links)
Expatriates' degree of adjustment to living and working in a foreign country is well-accepted as an important outcome variable in expatriate management research. However, measures of degree of adjustment do not capture the breadth of strategies expatriates may use to achieve such adjustment, which may be critical for understanding whether expatriates have achieved a healthy and productive orientation to life abroad. Borrowing from research on immigrant populations, this study examines the construct of expatriate acculturation strategies, which characterize expatriates' mode of adjustment along two independent dimensions reflecting maintenance of one's home culture and engagement of the host culture, respectively. One hundred U.S. expatriates were recruited and completed an index of acculturation strategies. In addition, participants completed survey and reaction-time based measures of proposed antecedents, correlates, and outcomes of varying acculturation strategies. Results suggest that expatriates largely pursue either a maintenance-focused or engagement-focused strategy and that acculturation strategies are not redundant with degree of adjustment. Relationships between acculturation strategies and relevant individual differences, characteristics of expatriate positions, and outcomes are discussed.
448

Contracted spans of temporal integration in adults with attention deficit hyperactivity disorder

Marusich, Laura Ranee 06 February 2012 (has links)
ADHD is a highly prevalent disorder in both children and adults that involves significant impairment throughout the lifespan, and yet the core cognitive deficits of the disorder are not well understood. Accumulating evidence of dysfunctioning dopamine systems motivated the theory that delay-of-reinforcement gradients are altered in ADHD in such a way that reinforcers must arrive earlier in time following a response for an association between the two to be learned. The current work is motivated by the conjecture that dopamine dysfunction has consequences for the maximum timescales over which connections can be formed, not just in reinforcement learning, but also in the processes of temporal integration and scene formation that allow humans to understand and navigate their world. There is a maximum window of temporal separation over which discrete events can be integrated into a unified experience, and the current experiments indicate that this maximum window of integration is contracted in ADHD. The experiments included multiple tasks designed so that the participant response required implicit integration over temporal intervals, and the length of those intervals was varied as an independent variable. Adults with and without ADHD completed these tasks, and the strength of temporal integration was measured with respect to interval length and compared between the two groups. This methodology was applied in five types of tasks: rhythmic tapping, spatial cuing, irrelevant feature priming, and two apparent motion tasks. On the whole, this suite of studies was successful in demonstrating a contraction in the maximum interval over which temporal integration can occur in ADHD relative to controls. Two of the tasks, rhythmic tapping and spatial cuing, generated unexpected and interesting results, and several follow-up tasks were designed to further explore these findings. As a result, a somewhat improved tapping task was discovered. This tapping task, as well as the irrelevant feature priming task and one of the apparent motion tasks, demonstrated potential utility for the diagnosis of adults with ADHD. / text
449

Quantifying electrostatic fields at protein interfaces using classical electrostatics calculations

Ritchie, Andrew William 17 September 2015 (has links)
The functional aspects of proteins are largely dictated by highly selective protein- protein and protein-ligand interactions, even in situations of high structural homology, where electrostatic factors are the major contributors to selectivity. The vibrational Stark effect (VSE) allows us to measure electrostatic fields in complex environments, such as proteins, by the introduction of a vibrational chromophore whose vibrational absorption energy is linearly sensitive to changes in the local electrostatic field. The works presented here seek to computationally quantify electrostatic fields measured via VSE, with the eventual goal of being able to quantitatively predict electrostatic fields, and therefore Stark shifts, for any given protein-interaction. This is done using extensive molecular dynamics in the Amber03 and AMOEBA force fields to generate large ensembles the GTPase Rap1a docked to RalGDS and [superscript p]²¹Ras docked to RalGDS. We discuss how side chain orientations contribute to the differential binding of different mutations of Rap1a binding to RalGDS, where it was found that a hydrogen-bonding pocket is disrupted by the mutation of position 31 from lysine to glutamic acid. We then show that multi-dimensional umbrella sampling of the probe orientations yields a wider range of accessible structures, increasing the quality of the ensembles generated. A large variety of methods for calculating electrostatic fields are presented, with Poisson- Boltzmann electrostatics yielding the most consistent, reliable results. Finally, we explore using AMOEBA for both ensemble-generation as well as the electrostatic description of atoms for field calculations, where early results suggest that the electrostatic field due to the induce dipole moment of the probe is responsible for predicting qualitatively correct Stark shifts.
450

What is the effect of retrieval practice on competing associates in cued-recall?

Akirmak, Umit 01 June 2006 (has links)
There have been many theories on why we forget. One of the recent approaches to this phenomenon is retrieval induced forgetting (RIF). The present study investigated RIF and different kinds of disruptions and their effects by using extra-list cued recall task. Some participants studied two additional word lists after the target list and some participants studied and were tested from these interpolated lists before their final recall of target list. Relatedness of the interfering lists was also manipulated. There were two control groups that either got an immediate test or got a math task before memory test. The particular interest was on the target competitor effect. The results of the study indicated that all the disruption conditions reduced the effects of competitors. However, there was no effect of retrieval-induced forgetting and also no effect of relatedness. The importance of retention interval on forgetting was discussed.

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