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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.
181

Mathematical Development: The Role of Broad Cognitive Processes

January 2012 (has links)
abstract: This study investigated the role of broad cognitive processes in the development of mathematics skills among children and adolescents. The participants for this study were a subsample of a nationally representative sample used in the standardization of the Woodcock-Johnson III Tests of Cognitive Abilities and the Woodcock-Johnson III Tests of Achievement, Normative Update (Woodcock, McGrew, & Mather, 2007). Participants were between 5 years old and 18 years old (N = 4721; mean of 10.98 years, median of 10.00 years, standard deviation of 3.48 years), and were 50.7% male and 49.3% female. Structural equation models supported the theoretical suggestion that broad cognitive processes play significant and specific roles in the development of mathematical skills among children and adolescents. Implications for school psychology researchers and practitioners are discussed. / Dissertation/Thesis / Ph.D. Educational Psychology 2012
182

Development of Evaluation Methods for Community-based Participatory Risk Management-with a Focus on Social Earthquake Resilience / 震災に対する社会の復元力に注目したコミュニティにおける参加型地震リスクマネジメントの評価法の開発 / シンサイ ニ タイスル シャカイ ノ フクゲンリョク ニ チュウモクシタ コミュニティ ニ オケル サンカガタ ジシン リスク マネジメント ノ ヒョウカホウ ノ カイハツ

BAJEK, Robert Pawel 25 September 2007 (has links)
学位授与大学:京都大学 ; 取得学位: 博士(工学) ; 学位授与年月日: 2007-09-25 ; 学位の種類: 新制・課程博士 ; 学位記番号: 工博第2848号 ; 請求記号: 新制/工/1419 ; 整理番号: 25533 / Kyoto University (京都大学) / 0048 / 新制・課程博士 / 博士(工学) / 甲第13377号 / 工博第2848号 / 新制||工||1419(附属図書館) / 25533 / UT51-2007-Q778 / 京都大学大学院工学研究科都市社会工学専攻 / (主査)教授 岡田 憲夫, 教授 中川 大, 教授 多々納 裕一 / 学位規則第4条第1項該当
183

RECOVERY OF WHOLE SOIL CONDITIONS THROUGH RESTORATION FROM AGRICULTURE AND ITS ROLE IN MEDIATING PLANT-PLANT COMPETITION

Scott, Drew Austin 01 December 2015 (has links)
The tallgrass prairie has been severely reduced in size, making restoration important to maintain communities and functions of this ecosystem. A chronosequence approach was used to determine recovery of physical and biological soil properties. The recovery models of soil properties provided information to explain the variation in total C stock of the whole soil. Recovery models also provided information to design a competition experiment based on variation in whole soil conditions with land use history. The filter framework hypothesis is a useful concept for examining tallgrass prairie restoration; the theory states only a subset of species in the region will be able to establish in a specific location due to abiotic and biotic filters. With this theory in mind, I explored the influence of whole soil conditions as affected by land use history (cultivation/restoration) and how these conditions altered plant-plant competition dynamics of a dominant grass was studied. Belowground plant biomass recovers with cessation of tillage and restoration back to prairie, providing an organic matter source for microbial populations to recover and soil macroaggregates to form. This has potential to increase C sequestration in soils and decrease nitrous oxide efflux from soils. Intact 5.5 cm dia cores were collected to a depth of 10 cm in each field to determine physical and biological soil properties. Belowground plant, microbial community, and soil structure properties were modeled to recover coinciding with an increase in total C stock of the whole soil. Structural equation modeling revealed that soil structure physically protecting organic matter explained the most variation in soil carbon sequestration with restoration. Most of the total C was contained within the macroaggregate size fraction; within this fraction most of that C is within the microaggregates within macroaggregates fraction. Soil structure is critical for recovery of soil carbon stocks and the microaggregate within macroaggregate fraction is the best diagnostic of sequestered C. ANCOVA results indicate that while the slopes of nitrous oxide efflux rates did not differ, cumulative efflux differed, though this was not related to time since restoration. Dominant grasses, such as Andropogon gerardii, can exclude subordinate species from grassland restorations. Thus, understanding changes in competition dynamics of dominant grasses could help maintain richness in grassland restorations. There may be changes in competition dynamics with whole soil conditions affected by land use history (cultivation/restoration) as plant available nutrients will decrease, microbial populations will increase, and soil structure will improve with restoration from cultivation to prairie. Using 4 soil treatments of varying land use history with four species treatments, to determine if effects are general or species specific, pairwise substitution competition experiments were conducted. Relative A. gerardii response to competition was compared among soil and species treatments using competition intensity and competition importance indices utilizing final plant biomass, relative growth rate based on maximum height, and net absolute tiller appearance rate. The experiment was conducted over 18 weeks, allowing A. gerardii to flower. A significant intensity result and significant importance results utilizing biomass measurements indicated that the 16 year restored prairie soil cause A. gerardii to be a relatively better competitor against forbs than in all other soils except for cultivated soil, likely due to positive plant-soil feedbacks. Significant importance results utilizing tiller appearance rate indicated that the cultivated and 3 year restored prairie soil caused A. gerardii to be a relatively better competitor than in the 16 year restored and never cultivated native prairie soils, likely due to changes in whole soil conditions related to land use history. There were only general soil effects, as soil treatments did not interact with species treatments. A. gerardii was a relatively better competitor against non-leguminous forbs, indicating that legumes are a better competitor for a limiting nutrient than A. gerardii or that this species is not in direct competition with legumes.
184

Personality Attributes in Clinical Presentation, Measurement, and Treatment

Thalmayer, Amber Gayle 10 October 2013 (has links)
Psychotherapy is sought for diverse problems, and trust in its efficacy has led to increasing parity in insurance coverage for psychological services. But about half of those who begin therapy drop out prematurely, and only about half of those who complete therapy experience significant improvements. Here issues of efficacy measurement and the potential role of personality differences to better guide and assess treatment are explored. It is hoped this knowledge could lead to increased success rates. In terms of outcome measurement, the use and psychometric properties of the Outcome Questionnaire-45 (OQ-45), a popular, brief measure of psychological functioning and change, are assessed. Factor structure is tested in clinical (Study 1) and student (Study 2) samples. Alternative scoring models test whether dimensions of personality drive responses. Using bi-level models, including a total score factor, fit of the intended structure and three- and four-factor personality models was similar. A seven-factor problems model provided the best fit. About half the variance in OQ scores was accounted for by a Big Six personality inventory. The best items for assessing personality attributes in OQ-45 data are noted. Secondly, the relation between personality attributes and clinical presentation and outcomes is explored. Self-report scores on personality attributes predict virtually every life outcome and are highly associated with clinical presentation. Such attributes surely also play a role in treatment, but this association has not been widely studied. In Study 3 the relation of personality attributes to presentation, usage, and outcome is tested in a Couples and Family Therapy clinic sample (N = 222). Neuroticism was strongly associated with initial OQ-45 score, as were other scales (except Openness) to a lesser degree. Being older, more educated, and married predicted attending more sessions, and being older, female, and higher income predicted termination success. Personality scales did not play a role in either outcome. Honesty/Propriety and Neuroticism were, however, associated with steeper decrease in OQ-45 scores over time. / 2015-10-10
185

Help-Seeking Models for Asian International and American Students

January 2015 (has links)
abstract: The relation of stigma to help-seeking attitudes and intentions and how these relations differed across cultures for American students, East Asian, and South Asian international students, were the focus of this study. Previous researchers had found that not seeking professional psychological help when needed was prevalent for both American and international students. Stigma has been found to be a salient factor in influencing attitudes of individuals and may prevent individuals from getting the help they need. Both public and self-stigma were utilized to predict attitudes and intentions to seek psychological help in a sample of 806 students. Structural equation modeling analyses were conducted to assess the relationships in how self-stigma, public stigma, attitudes toward counseling and intentions to seek counseling will interplay for American, East Asian and South Asian international students, further expanding on previous help-seeking model (Vogel et al., 2007). Results indicated differences in factor structure of scales for the groups, and new factors were identified. With the new factors derived, different models of help-seeking intentions were established for each group, and distinct relations among the factors were explained. Furthermore, implications for future studies and clinical relevance were highlighted. / Dissertation/Thesis / Doctoral Dissertation Counseling Psychology 2015
186

The Role of Adult Attachment Anxiety in the Relation between Cognitions and Daily Pain in Fibromyalgia Patients

January 2015 (has links)
abstract: An abundance of data has established the links between both pain-related cognitions and relationship attachment qualities in the experience of pain, including long-term functional health in chronic pain patients. However, relatively few studies have explored the dynamic relation between pain and pain-related cognitions within a day, and no studies have tested the moderating role of relationship attachment on the within-day cognition—pain association in chronic pain patients. The objectives of this study were to: 1) assess whether late morning pain flares predicted changes in afternoon positive and negative pain-related cognitive appraisals, and whether these changes in turn predicted end-of-day pain, and 2) explore whether adult attachment anxiety moderated the pain-cognition relation in individuals with chronic pain due to fibromyalgia. One hundred and seventy four partnered individuals with fibromyalgia completed initial assessments of demographics and attachment anxiety, and subsequently completed electronic assessments of pain intensity and positive and negative cognitive pain-related appraisals three times a day for three weeks. Multilevel structural equation modeling established that a latent negative cognitive appraisal factor (encompassing shared variance from catastrophizing, pain irritation, and self-criticism related to pain) mediated the link between late morning and end-of-day pain intensity, in line with the hypothesis. Analyses also provided some support for a mediating role for a positive cognitive appraisal factor (a composite of pain control, pain self-efficacy, and feeling pain without reacting) in the daily course of pain; the mediated effect for positive appraisals was weaker than the mediated effect of negative appraisals, but was sustained in a model that included negative appraisals. Inconsistent with prediction, attachment anxiety did not moderate the within-day links between pain and cognitions. These findings establish the dynamic links within day between pain and pain-related cognitions, and highlight the potential impact of both negative and positive cognitions on daily pain regulation. They point to the value of broadening cognitive-behavioral treatment strategies for chronic pain patients to target not only negative but also positive cognitions. / Dissertation/Thesis / Doctoral Dissertation Psychology 2015
187

Determining Persistence of Community College Students in Introductory Geology Classes

January 2014 (has links)
abstract: Science, Technology, Engineering & Mathematics (STEM) careers have been touted as critical to the success of our nation and also provide important opportunities for access and equity of underrepresented minorities (URM's). Community colleges serve a diverse population and a large number of undergraduates currently enrolled in college, they are well situated to help address the increasing STEM workforce demands. Geoscience is a discipline that draws great interest, but has very low representation of URM's as majors. What factors influence a student's decision to major in the geosciences and are community college students different from research universities in what factors influence these decisions? Through a survey-design mixed with classroom observations, structural equation model was employed to predict a student's intent to persist in introductory geology based on student expectancy for success in their geology class, math self-concept, and interest in the content. A measure of classroom pedagogy was also used to determine if instructor played a role in predicting student intent to persist. The targeted population was introductory geology students participating in the Geoscience Affective Research NETwork (GARNET) project, a national sampling of students in enrolled in introductory geology courses. Results from SEM analysis indicated that interest was the primary predictor in a students intent to persist in the geosciences for both community college and research university students. In addition, self-efficacy appeared to be mediated by interest within these models. Classroom pedagogy impacted how much interest was needed to predict intent to persist, in which as classrooms became more student centered, less interest was required to predict intent to persist. Lastly, math self-concept did not predict student intent to persist in the geosciences, however, it did share variance with self-efficacy and control of learning beliefs, indicating it may play a moderating effect on student interest and self-efficacy. Implications of this work are that while community college students and research university students are different in demographics and content preparation, student-centered instruction continues to be the best way to support student's interest in the sciences. Future work includes examining how math self-concept may play a role in longitudinal persistence in the geosciences. / Dissertation/Thesis / Ph.D. Curriculum and Instruction 2014
188

Os determinantes do comportamento exportador da indústria calçadista francana / Factors that condition the export behavior of the footwear industry in the city of Franca

Alfredo José Machado Neto 19 June 2006 (has links)
Este estudo teve por objetivo investigar, à luz das teorias de internacionalização de empresas, a forma de inserção no mercado externo das indústrias de calçados da cidade de Franca, Estado de São Paulo e as características determinantes do comportamento seu exportador. Foi elaborado um cadastro atualizado do setor e enviados questionários a todas as empresas de pequeno, médio e grande porte (208 indústrias). Desse total, 146 empresas responderam à pesquisa e foram aproveitados 117 questionários. A pesquisa foi respondida, em grande parte, por diretores e pelos principais executivos das empresas, que expressaram suas percepções em relação aos diversos aspectos do processo de internacionalização de suas indústrias. A investigação procurou identificar as características da empresa, do respondente, da equipe dirigente, da produção e da comercialização dos seus produtos, tanto no mercado interno como externo. Foram investigados ainda o grau de diferenciação do produto, a imagem do pólo produtivo, as expectativas sobre as vantagens do comércio internacional e a percepção de barreiras internas à exportação. Por último se verificou a forma utilizada para a inserção no mercado externo e o estágio atual dessas empresas no processo de internacionalização de suas atividades. Pode-se afirmar que as empresas da indústria calçadista francana seguem uma estratégia gradual de inserção no mercado internacional, em consonância com a literatura sobre o processo de internacionalização. Foram identificados também alguns determinantes do compromisso exportador, as estratégias utilizadas e as ações implementadas para penetração no mercado externo e sugerido um modelo da empresa exportadora da indústria calçadista francana. O que se depreende, é que as empresas que não exportam apresentam problemas internos relacionados à percepção da falta de capacidade de produção para atender ao mercado externo, à dificuldade em lidar com as diferenças lingüísticas e culturais e o desconhecimento geral de como exportar. Tudo isso aliado a uma visão até certo ponto distorcida dos benefícios que a internacionalização pode trazer para as empresas, do ponto de vista das oportunidades de crescimento e de diversificação dos produtos fabricados que o mercado externo oferece e da rentabilidade a ser obtida nas exportações. A percepção dos dirigentes é a de que falta a estas empresas, também, uma melhor qualidade e tecnologia na fabricação de seus produtos, que se reflete em menores preços de venda do que os praticados pelas empresas exportadoras. / The purpose of this study was to investigate, concerning the theories of internationalization of enterprises, the way the footwear industries from Franca, State of São Paulo, are inserted in the foreign market and the striking features of their export behavior. An up-to-date catalogue of the enterprises was developed and questionnaires were sent to all small, medium and large enterprises (208 industries). From those, 146 enterprises responded to the survey and 117 were suitable for the purposes. The survey was responded, in great part, by directors and by the principal executives of the enterprises, whom expressed their perceptions of many aspects of the internationalization process of their enterprises. The investigation meant to identify the characteristics of the enterprise, of the person responding the questionnaire, of the managing staff, and of the production and commerce of their products, both in the domestic and foreign markets. It was also investigated at what degree the product was different from those in the market, the image of the productive pole, the expectations over the advantages of international trade and the perception of domestic export barriers. At last, the methods used for inserting the enterprises in the foreign market were verified, as well as their current status in the process of internationalization. It can be stated that the footwear enterprises from Franca follow a strategy of gradual insertion in the international market. Some determinants of the export agreement, the strategies used and the actions taken in order to reach the foreign market were also identified and a model of an exporting footwear enterprise was suggested. What can be inferred is that the enterprises which do not export present internal problems related to the perception of the lack of production power to meet the foreign market needs, to the difficulties in dealing with the language and cultural differences and to the lack of know how in exports. All allied with a view a little distorted of the benefits the internationalization can bring to the enterprise, from the point of view of growth opportunities and of the variety of manufactured products that the foreign market offers and of the profitability that can be reached through exports. The perception of the directors is that there is a lack of better quality and technology in the manufacture of their products, which is reflected in prices lower than those of the exporting enterprises.
189

Modelos de Equações Estruturais: um estudo de simulação / Structural Equation Model: a simulation study

Erasnilson Vieira Camilo 22 January 2015 (has links)
Com a necessidade de analisar dados cada vez mais complexos nas mais diversas áreas, surge também a necessidade de novas técnicas e novas modelagens. Nesse contexto, os Modelos de Equações Estruturais são uma evolução da análise de caminhos proposto por Wright (1921), que por sua vez, consegue captar as relações de causa e efeito entre diferentes tipos de variáveis. Este trabalho tem como objetivo abordar uma revisão em torno dessa técnica, com ênfase aos modelos recursivos que utilizam em sua maioria apenas variáveis observadas. A aplicação deste trabalho está fundamentada em um processo de simulação considerando assim, seis cenários com diferentes tipos de relações numa mesma estrutura. As médias das estimativas dos parâmetros no processo de simulação resultam em valores próximos aos valores verdadeiros. Por meio de figuras e gráficos, pode-se observar o comportamento dos parâmetros por meio do erro quadrático médio e boxplot. A análise foi realizada com a utilização do software R e programas implementados com pacote sem (FOX; WEISBERG, 2012) e programação apresentada no Apêndice deste trabalho. / With the increasingly need to analyze complex data in several areas, comes the need for new techniques and new models. In this context, the Structural Equation Modeling is an evolution of the path analysis proposed by Wright (1921), which, can capture the relations of cause and effect between different types of variables. The present work aims to approach a review about this technique with emphasis on recursive models using mostly observed variables only. The application of this work is based on a simulation process considering six scenarios with different types of relationships within the same structure. The mean estimates of the parameters in the simulation result in values that are close to the true values, and by means of figures and graphs, one can observe the behavior of the parameters by means of the mean squared error and boxplot. The analysis was performed using the software software R and implemented programs as sem package (FOX; WEISBERG, 2012) and the programming is presented in the Appendix of this work.
190

Estratégias de internacionalização: um estudo sobre a influência dos fatores de riscos sobre a estratégia e objetivos estratégicos em empresas exportadoras brasileiras / Internationalization strategies: a study on the influence of risk factor on strategy and strategic objectives in brazilian exporting companies

Crisomar Lôbo de Souza 28 March 2017 (has links)
O ambiente competitivo e globalização vem provocando mudanças nas estratégias das empresas, fomentando, muitas vezes, para um processo de internacionalização. As empresas procuram internacionalizar-se de acordo com seus objetivos estratégicos, traçando uma estratégia de internacionalização. Sair do seu ambiente para um país desconhecido significa que a empresa estará sujeita a correr certos riscos e, portanto, requer uma estratégia que avalie os riscos envolvidos para se estabelecer em um determinado país. O conhecimento desses riscos vai proporcionar a empresa mitigar ou mesmo eliminar os riscos envolvidos. Independente do processo de entrada em outro país, sempre haverá a questão do risco. Geralmente, quando uma empresa decide se internacionalizar, ela opta primeiro pelo processo de exportação, em que terá de lidar com vários tipos de risco em suas decisões gerenciais para alcançar seus objetivos estratégicos. Portanto, essa pesquisa foi feita com oitenta e quatro empresas exportadoras brasileiras, do estado de São Paulo, com faturamento de até 10 milhões de dólares listadas na Confederação Nacional da Indústria (CNI). O objetivo desse estudo foi entender como e quais riscos envolvidos na internacionalização de empresas exportadoras brasileiras exercem influência sobre a estratégia e objetivos estratégicos na internacionalização de empresas exportadoras. Para a análise da pesquisa, foi utilizada a técnica de modelagem de equações estruturais baseada em variância, na qual foi utilizada uma survey para coleta de dados. Foram geradas quatro hipóteses, três relacionadas ao risco e estratégia e uma relacionada à estratégia e ao risco. Como resultado, duas hipóteses foram confirmadas e, portanto, duas rejeitadas. Essa pesquisa contribui com o conhecimento científico, pois, além de verificar os riscos que influenciam na estratégia e objetivos estratégicos, ela traz a concepção de envolver riscos não somente financeiros, mas também do ambiente, do setor e da empresa na estratégia para a internacionalização. / The competitive environment and globalization has been provoking changes in the strategies of companies, often leading to an internationalization process. The companies seek to internationalize themselves according to their strategic objectives, to which a strategy of internationalization will be traced. Leaving your environment to an unknown country means that the company is subject to certain risks and therefore requires a strategy that assesses the risks involved in establishing itself in a particular country. Knowing these risks will enable the company to mitigate or even eliminate the risks involved. Regardless of the process of entry into another country, there will always be the issue of risk. Usually, when a company decides to internationalize, it opts for the first time through the export process, where it will have to deal with various types of risk in its managerial decisions to reach its strategic objectives. Therefore, this research was conducted with eighty-four Brazilian companies in the state of São Paulo, with sales of up to 10 million dollars listed in Confederação Nacional da Indústria (CNI). The objective of the study was to understand how and what risks involved in the internationalization of Brazilian exporting companies influence the strategy and the strategic objectives in the internationalization of exporting companies. But even this process depending on the intensity of export the company will be subject to risk because it is unknown to the host country. Therefore, this research was carried out with Brazilian export companies, whose objective was to investigate the influence of the risks involved in the internationalization of Brazilian exporting companies on the strategy of internationalization and strategic objectives. For the analysis of the research was used the technique of modeling of structural equations based on variance, where a survey was used to collect data. Four hypotheses were generated, three related to risk and strategy and one related to strategy and risk. As a result, two hypotheses were confirmed and therefore two rejected. This research contributes with scientific knowledge, because in addition to verifying the risks that influence the strategy and strategic objectives, it brings the concept of involving not only financial risks but also the risk of the environment, sector and the company in the strategy for internationalization.

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