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1
Battle, Paula C. "Identity and intimacy development across adolescence, a cross-sectional study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0021/NQ32876.pdf.
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Lambert, Tracy. "CROSS SECTIONAL STUDY OF AGILE SOFTWARE DEVELOPMENT METHODS AND PROJECT PERFORMANCE." NSUWorks, 2011. http://nsuworks.nova.edu/hsbe_etd/56.
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Agile software development methods, characterized by delivering customer value via incremental and iterative time-boxed development processes, have moved into the mainstream of the Information Technology (IT) industry. However, despite a growing body of research which suggests that a predictive manufacturing approach, with big up-front specifications, detailed estimates, and speculative plans applicable to manufacturing domains, is the wrong paradigm for software development, many IT organizations are still hesitant to adopt agile approaches (Larman, 2004).
This study extends research based on the Unified Theory of Acceptance and Use of Technology (Venkatesh, Morris, Davis, & Davis, 2003) into the domain of business processes. Specifically, processes related to the `behavioral intent' to adopt agile software development methods. Further, it investigated relationships between adoption and the impact on project performance attributes.
A sample was obtained from a population of IT practitioners from within the IT industry. The sampling frame consisted of members from the global Software Process Improvement Network (SPIN) chapters, Agile User Groups, and I.T. industry conference promoters and presenters. Independent variables included performance expectancy, effort expectancy, social influence, and facilitating conditions, with the dependant variable being behavioral intent to adopt agile software development methods. The independent variable of agile software development adoption and dependent variables of project performance were also included as well as predictive models relating adoption to on-time delivery of project functionality and stakeholder satisfaction.
The variables in the study were measured via a 65-item questionnaire based on previous scales, and tested to ensure validity and reliability. The research questions were developed to identify correlations between performance expectancy, effort expectancy, social influence, facilitating conditions, and the behavioral intent to adopt agile software development methods. Additional questions measured the correlation between adoption and key project performance attributes.
The research found positive correlations between performance expectancy, effort expectancy, social influence, facilitating conditions, and behavioral intent to adopt agile software development methods, positive correlations between adoption and on-time delivery of project functionality and stakeholder satisfaction, and weak positive correlations with post delivery defects and project success rates.
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McGregor, Henry Roystan. "A cross sectional study of the capital structures of firms listed on the JSE." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/29088.
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This study examines the capital structures' differences across industry classification for 221 firms listed on the Johannesburg Stock Echange, from 2007 to 2016. A panel multiple regression model which takes into account the determinants of capital structure was used to identify the effect of firm level characteristics on the capital structure across the industrial sectors. The findings indicate that firms in the health care services, utilities and industrial sectors employ a higher percentage of leverage in the mix of capital, compared to the others. From the panel regression analysis, asset tangibility, profitability and firm size were found to have a significant effect on total debt, with varying effects observed for long-term and short-term debt. On the industrial determinants of capital structure, firms in the basic material industry, total debt ratio is mainly determined by the fixed-asset ratio, indicating that firms in this sector rely on tangibility of assets to secure debt financing. Profitability has a negative relationship with total debt, indicating possibly the presence of the pecking order theory. The consumer goods and consumer service industry firms' leverage ratios are mainly determined by the firms' profitability. The health care industry shows signs of the Trade-off Theory being present as the main determinant, being the effective tax rate which has an inverse relationship with the total debt ratio. The industrial industry has an inverse relationship with profitability, also indicating a possible pecking order theory at play. The main determinants for the technology industry are asset tangibility, profit and the effective tax rate. The telecommunication industry determinant of total debt is profit.
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Rule, Sarah Jane. "A cross-sectional study of french interlanguage development in an instructional setting." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364750.
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Du, Jia-Zheng. "Methods and software development for sectional and topological optimization of frame structures." Reims, 2004. http://theses.univ-reims.fr/exl-doc/GED00000024.pdf.
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Afin de satisfaire les besoins industriels en calcul et optimisation des structures, des méthodes de l'optimisation de section et de topologie de structures de poutre ont été étudiées et des logiciels pertinents basés sur ces méthodes ont été développés en utilisant les logiciels MSC/Patran-Nastran comme plate-forme. En combinant la méthode de critère d'optimalité et la méthode de programmation mathématique, différentes méthodes sont utilisées pour traiter les limitations avec différentes propriétés. Le modèle original de l'optimisation de section est transformé en un problème dual selon la théorie duale pour améliorer l'efficacité de résolution. La méthode de "Approximate Scaling Step" et la méthode d'Elimination des Limitations Négatives permettent d'accélérer la procédure d'optimisation. Basé sur la méthode ICM (Independent Continuous Mapping), un modèle de l'optimisation topologique utilisant les variables continues (entre 0 et 1 au lieu de 0 ou 1) est établi. Trois critères de convergence sont introduits pour obtenir rapidement et précisément la topologie optimale d'une structure. Pour ne pas éliminer les éléments ayant leur variable topologique nulle au cours de l'optimisation, la méthode de faible matériau est utilisée et comparée à la méthode de section minime. L'optimisation de topologie dans plusieurs cas de chargement est étudiée sous trois types de limitations : les limitations locales de contraintes, les limitations globales de déplacements et leur combinaison. Les méthodes ci-dessus ont été implantées dans les logiciels MSC/Patran&Nastran. Des exemples ont montré une amélioration importante de l'efficacité et de la précision dans l'optimisation de section et de topologieTo satisfy the requirement on computation and optimization of frame structures in the engineering field, some sectional and topological optimization methods of frame structures are studied and a relevant software based on the present study is developed using the MSC/Patran&Nastran software as platform. Combining the optimality criteria method and the mathematical programming method, several methods are adopted to deal with the constraints with different properties. The original sectional optimization model is transformed into a dual problem according to the dual theory in order to reduce the number of the design variables so speed up the resolution. The methods of Approximate Scaling Step and Deletion of Negative Constraints also largely improve the efficiency. Based on the ICM (Independent Continuous Mapping) method, a topological optimization model with continuous topological variables (between 0 and 1 instead of 0 or 1) is built. In order to quickly and accurately obtain the optimum topological structures, three criteria are introduced and a self-adaptive algorithm is proposed. To deal with the elements with their null topological variable, the weak material method is proposed and compared with the tiny section method. The topological optimization for multi-loading cases is studied with three conditions: the local stress constraints, the global displacement constraints and their combination. According to the above methods, the MSC/Patran&Nastran software is secondly developed. The examples clearly show the notable improvement of the efficiency and accuracy
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Amparbeng, Kofi. "A cross sectional analysis of SME failure within the industrial sector: focus on IDC funded investments." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/29006.
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Small and Medium Enterprises play an important economic role in many countries. In South Africa, for example, a significant proportion of the formal business entities are SMEs; and they contribute between 52 and 57% to GDP, and provide about 61% to employment. However, despite their significance in the local economy, SMEs regularly encounter the threat of failure. Business failure can be disruptive and costly to a large number of stakeholders, which include the owner, the employees, suppliers, customers, investors, bankers, communities, etc. This study examines failed SMEs and compares them with SMEs that are going concerns in order to discover significant differences between the two groups. The study adopted non-parametric tests and binary logistic regression methods. The final data set included 50 failures covering the calendar years July 2009 and June 2012, and 50 going concerns listed in the IDC database on 30 June 2012. The dataset was limited to industrial sector firms from the Chemicals, Metal, Textiles and Wood & Paper industry. The results of this study indicate that, the going concern sample of SMEs were larger than the failures in terms of firm size; led by more experienced management; older in terms of years in existence; and were supported by a stronger equity structure and interest cover ratio. The binary logistic regression results also show that SMEs located in provinces with high per capita income are associated with high probability of failure. But SMEs with increase in annual turnover or increase in equity structure are less likely to fail. Understanding which variables are statistically significantly different between the two groups can enable business owners to develop plans to increase their likelihood of survival. They can also help other stakeholders such as funders implement policies and controls for funding SMEs that mitigate these risk factors.
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Kulceski, Samuel F. "Development of Generalized Trimaran Hullform Design Methodology for a Naval Warship." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1819.
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The purpose of this thesis is to advance research in the development of trimaran hullforms and analyze the feasibility of the hullform for a possible naval surface combatant using current hullform design tools.
The “Generalized” Trimaran Methodology is a new process that focuses on the manipulation of the three hulled system’s total sectional area curve. The methodology is intended for rapid hull form development during the conceptual design phase, and can analyze an infinite number of trimaran hullforms.
The thesis first proposes a new methodology for the design of trimaran hullforms, describes how the process was applied to an existing hullform, presents results of the analysis, and provides validation data from a tow tank resistance experiment.
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Hendrick, David J. "Discordance between cross sectional and longitudinal estimates for the effect of ageing on lung function." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33000.
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To evaluate why discordance may occur between regression coefficients from cross sectional and longitudinal analyses when ventilatory function is related to ageing, a population was created by computer, and modelled to simulate functional change during life. The program incorporated the effects of many factors known to influence lung function measurements, which were adjusted experimentally so that their contributions to any discordance could be assessed. Regression analyses showed that significant discordance could be induced if the oldest birth cohort failed to reach the same maximal level of function as the youngest; if a quadratic ageing term was excluded from the independent regression variables; or if the effects of certain confounders were present. Discordance occurred additionally if cross sectional estimates became imprecise, but then the differences (often marked) from longitudinal estimates were not significant. It is concluded that discordance may be fundamental and unavoidable (though explicable), or merely a consequence of imprecision.
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Gangji, Nazneen. "Phonological development in Swahili a descriptive, cross-sectional study of typically developing pre-schoolers in Tanzania." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/2916.
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Includes abstract.Includes bibliographical references.
Swahili is widely spoken in East African countries, but to date there are no culturally and linguistically appropriate materials available for speech language therapists working in the region. The challenges of assessing and managing Swahili speaking children with speech difficulties are further exacerbated by the limited research available on the typical acquisition of Swahili phonology. This exploratory study aimed to describe the phonological development of 24 typically-developing first language Swahili speaking children between the ages of 3;0 and 5;11 years in Dar es Salaam, Tanzania. A cross-sectional design was used with six groups of four children in six month age bands.
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Maphalala, Zinhle. "Phonological development of first language isiXhosa-speaking children aged 3;0-6;0 years a descriptive cross-sectional study." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/2925.
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Johnson, Nathan Warren. "A cross-sectional in vivo pilot study on the relationship between interproximal wear and facial form." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/2905.
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The main goal of this pilot study was to determine if a correlation was present between interproximal wear rate and facial form and/or interproximal wear surface area and facial form. Additionally, interproximal wear was evaluated with regards to salivary pH. VPS impressions of interproximal tooth surfaces were captured in 29 adolescent volunteers after orthodontic separation and prior to band placement. A positive replica was created using a type IV die stone. The subsequent die stones were scanned, analyzed and interproximal wear surface area measurments were calculated. Correlation tests revealed that there was no clear or consistent relationship between interproximal wear and facial form and interproximal wear and salivary pH. Methodological limitations were discussed and potential changes for future research were presented.
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Cheng, Stephanie Weijung. "An exploratory cross-sectional study of interlanguage pragmatic development of expressions of gratitude by Chinese learners of English." Diss., University of Iowa, 2005. https://ir.uiowa.edu/etd/104.
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The present study is an exploratory cross-sectional study of interlanguage pragmatic development of expressions of gratitude, specifically, gratitude after receiving a favor. Expressing gratitude is a speech act that is taught at an early age and is commonly performed by native speakers of most languages. It is, thus, often assumed that learners can successfully say thank you in the target language. However, studies show that even advanced learners have difficulty adequately expressing gratitude.
The objectives of the present study are: (a) to investigate how native speakers of Chinese and native speakers of English express gratitude as defined by length of speech and use of strategies; (b) to examine whether there is evidence of pragmatic development in the speech act behavior of expressions of gratitude among Chinese learners of English with the increase of the length of residence in the United States; and (c) to examine whether there is evidence of pragmatic influence from L1 Chinese in English expressions of gratitude among Chinese learners of English.
The data were collected through a discourse completion task questionnaire. Subjects' responses were classified into eight thanking strategies. Descriptive and t-test analyses were conducted to identify the pragmatic differences that distinguished the behavior of the three English learner groups, which varied according to their length of stay in the United States, from that of Chinese and English native speakers.
The results show that Chinese and English native speakers have different preferences for thanking strategies in the eight situations. They are significantly different in the length of speech and use of strategies. In addition, there is a positive effect of the length of residence in the United States on English learners' pragmatic development. The results also show evidence of pragmatic influence from L1 Chinese. Moreover, contextual variables, social status, familiarity and imposition, have a significant influence on the length of speech and the use of strategies for all subject groups.
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Karlsson, Jacob, and Peter Reumark. "Future drivers and trends influencing the outbound logistics development : A cross-sectional study focusing on the industrial aftermarket." Thesis, Linköping University, Department of Management and Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9232.
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The main purpose of this thesis has been to explore and evaluate future drivers and trends within outbound logistics. In addition to this it was said that Syncron International AB, which assigned the study, should be able to use the findings to develop their products and services in a way that would satisfy future customer demand.
The thesis was mainly carried out in three steps. Firstly, an extensive theoretical framework was constructed which formed the base for the continuing study. The theoretical framework contributed to both opinions in the studied areas, which were further processed later on in the study, as well as it formed the interview material. Secondly, interviews were held with a selection of Syncron’s customers which had experience from the studied areas. The results from the empirical study were then evaluated and summarized. Thirdly, the empirical and the theoretical results were analyzed and compared to form conclusions regarding the future of outbound logistics. These conclusions included recommendations for how Syncron and similar companies should adjust and prepare for this development.
The future of outbound logistics will be more complex in many aspects due to various reasons. The customers are expected to demand more customized product and service offerings as well as they will demand suppliers to take over responsibility for service and maintenance. Distribution strategies like direct deliveries, cross-docking and transport consolidation are expected to be used to a greater extent in the future, as one method to deal with challenging future demands.
The above mentioned issues, in combination with increased environmental pressures, will demand more from planning and management activities. This will in turn require further developed tools for planning and management, which are expected to be one of the main enablers for the future logistical development. These tools should also be able to increase the visibility throughout the entire supply chain, which is considered to become a crucial prerequisite in planning and forecasting processes in the future. It is important that companies like Syncron are aware of the expected enablers of the future logistical development, since it is within this area their customers will need assistance.
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Ling, Kit Tong. "A cross-sectional study of skeletal age, dental age, body height, body weight and sexual maturity of 12 years old Southern Chinese boys." Hong Kong : Department of Children's Dentistry and Orthodontics, University of Hong Kong, 1988. http://sunzi.lib.hku.hk/HKUTO/record/B38628272.
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Tomiuk, Daniel 1967. "The impact of site-communality on the attitudinal and behavioural components of site-loyalty : a cross-sectional study." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85960.
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We examine whether the precepts of what have been termed 'close', 'intimate', or, more specifically, 'communal' relationships in Social Psychology may be communicated via Web site content and whether this positively impacts Site-Loyalty. We introduce a variable called Site-Communality defined as the extent to which Web site content signals that a company's relationship with its customers goes beyond the formal, 'tit for tat' business dealings that are typically expected from purely commercial exchanges, and instead, more closely abide by the norms and behaviours evocative of friendships and/or family relations. We develop multi-dimensional measures of Site-Communality and Site-Loyalty. Using Structural Equation Modelling (LISREL VIII), we then empirically investigate the influence of Site-Communality on the attitudes and behavioural intentions associated with Site-Loyalty using cross-sectional data collected from 305 subjects asked to explore and evaluate one among many real Web sites chosen so as to maximize variability on Site-Communality.Our results show that Site-Communality has a strong, direct, positive effect on the attitudes and behavioural intentions associated with Site-Loyalty. This directly contradicts conjectures from several authors dismissing as unimportant or irrelevant to Web site design, the affective/relational aspects more closely associated with traditional, interpersonal, face-to-face commercial encounters (e.g., Cox & Dale, 2001; Zeithaml, Parasuraman, & Malhotra, 2001, 2002). Generally, such factors were believed to loose their relevance in self-service, Web-based commercial environments, at best, becoming contingently important only when customer/employee communications actually occurs (i.e., emails/telephone conversations).
However, contrary to our expectations, our results show that the positive relationship between Site-Communality and Site-Loyalty is attenuated (rather than accentuated) by the visitor's 'Communal-Orientation in Traditional Commercial Environments' which is defined as the extent to which a consumer enjoys 'getting to know' employees (i.e., waitress, bank teller, hair stylist) and relating with them on a more personal-level than is typically required for the effective delivery of a service. One possible explanation for this unexpected result is that when highly communally-orientated consumers are exposed to a Web site high in Site-Communality, they may be reminded of what they are missing out on if they choose to conduct their business online rather than in more traditional business environments.
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Bai, Ye. "Sources of cross-sectional variations in stock returns and risk : an empirical analysis of emerging markets." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/8034.
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It is well established in the financial economics literature that potential gains from international diversification are generated from the imperfect correlation between national stock market returns. This empirical study explores the factors that impede perfect integration among national equity markets by examining emerging markets data. The first major topic of the dissertation is to re-visit the debate on the relative importance of country and industry effects in the cross-sectional variation of stock returns. By applying the standard Heston and Rouwenhorst (1994) dummy variable decomposition method to $U. S. nominal returns from 11 industry sectors of 13 emerging markets from 1984 to 2004, this work confirms that country effects do play a dominant role in determining the cross-sectional variation in stock returns in emerging markets but since late 1990s, the industry effects have become increasingly important. This conclusion is robust even after the removal of three potential biases: inflation rate, exchange rate and interest rate effects, all of which may amplify the country effects. The second topic is to investigate the debate from the perspective of stock risk. Stock risk is modeled and calculated independently from a return model with ARCH type errors. By applying the standard dummy variable decomposition method to stock risks, the empirical evidence is found to support the conclusions drawn on stock return decompositions. Finally, in order to find the fundamental sources of the country and industry factors, pure country and industry effects are then regressed on fundamental characteristics of country and industry. The findings show that the change in the variables representing the exchange rate can explain a substantial amount of the country effect variations, while at the same time, banking and stock markets development also contribute to the variations. The regressions also find evidence that the legal origin of the market does matter to stock returns. Regressions on industry effects are not as promising as the results of the country effects regression. Only the geographical concentration of industries is found to explain a small amount of the industry effects.
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Foster, Austin Prescott. "Developmental variation and morphological integration between chondrocranial- and intramembranous-derived craniofacial skeletal components in a cross-sectional sample of C57BL6/J and C3H/HeJ mice." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6103.
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Introduction: Chondrocranial-derived components of the craniofacial skeleton are thought to exert a morphogenetic influence on surrounding intramembranous-derived skeletal structures. In our previous study (Foster and Holton, 2016), we found that the ontogenetic relationship between the nasal septum (derived primarily from the chondrocranium) and surrounding intramembranous-derived facial skeleton was highly variable in BL6 and C3H mice. The purpose of our present study was to examine samples of BL6 and C3H mice from 3 to 15 weeks of age to determine whether the variable interaction noted previously extends to chondrocranial- and intramembranous-derived components throughout the cranium. Methods: Cross-sectional samples of male C57BL/6J (BL6) and C3H/HeJ (C3H) at 3 (n=18) and 15 (n=30) weeks of age were studied. All mouse crania were scanned using a Skyscan 1272 microCT scanner, and a series of three-dimensional traditional and semilandmark coordinate landmarks were collected. Geometric morphometric techniques were utilized for data analysis. Results: During the period of 3-15 weeks of age, there was considerable variation in the ontogeny of chondrocranial- and intramembranous-derived craniofacial regions. Conclusions: During the period of 3-15 weeks of age, C3H mice were characterized by a relative enlargement of the chondrocranial-derived craniofacial skeleton. The chondrocranial morphology of the C3H mice may be a causal factor in the increased magnitude of variation seen in the C3H intramembranous-derived facial skeleton. Developmental variation within specific components of the craniofacial complex may account for taxonomic variation in facial height that accompanies anteroposterior facial skeletal reduction characteristic of taxa such as anthropoid primates.
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So, Lai-ying Lisa. "A cross-sectional study of skeletal, dental, physical growth and sexual maturity of 12-year-old southern Chinese girls in Hong Kong." Click to view the E-thesis via HKUTO, 1988. http://sunzi.lib.hku.hk/hkuto/record/B3195389X.
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Jeggo, Zenia M. "The phonological development of typically developing first language Zulu-speaking children aged 2;6 - 6;5 years : a descriptive cross-sectional study." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20468.
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Background: Zulu, one of the eleven official languages in South Africa, is the most spoken language in the country. However, research on children's phonological development in Zulu is minimal. To date there are no published Zulu speech assessments and associated normative data that speech-language pathologists (SLPs) can use to identify children with speech sound disorders who speak this language. Method: This descriptive, cross-sectional study aimed to document the phonological development of thirty-two typically developing first language Zulu-speaking children between 2;6 and 6;5 years. Participants attended school or crèche in Manguzi, KwaZulu-Natal, and were grouped into six month age categories. A single-word Zulu phonology assessment was developed and used to assess the participants. Assessments were audio recorded, and field transcriptions made using the International Phonetic Alphabet (IPA). Speech development was described in terms of phoneme acquisition, word shape, phonological processes and percentage of vowels (PVC) / consonants correct (PCC). Consonant acquisition was assessed in the penultimate syllable only, according to the structure of Zulu.
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Erkan, Berna. "The Role Of Sais In Promoting Sustainable Development: Environmental Auditing." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12613993/index.pdf.
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This thesis is based on cross-sectional data analyses by using Ordinary Least Squares (OLS) Method in order to determine the main drivers of the environmental performance and specifically the effects of environmental audits conducted by
Supreme Audit Institutions (SAIs) on sustainable development. Two general models are employed throughout the study that have the Environmental Performance Index
(EPI) as dependent variable and various sub-models for different income groups are produced to observe the individual and interactive effects of explanatory variables.
First model includes 150 countries regressing their EPI scores on income, population, literacy rate and indicators of the strength of institutional structure such as corruption
perceptions index or government effectiveness score. Then, second model which comprises 52 countries introduces the number of environmental audit reports as a new explanatory variable. Principal Component Analysis (PCA) is also applied to highly correlated variables and the models are reestimated. The results indicate that well functioning environmental management systems and resulting positive effects on
the environmental performance can only be attained through strengthened governmental institutions with high transparency and accountability as well as rigid
implementation of the related regulations. More specifically, environmental audit reports generated by SAIs are of vital importance for especially improving the environmental management systems of the developing countries.
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Petko, John. "Counselor education doctoral students' levels of Research Self-Efficacy, Interest in Research, and Research Mentoring: A cross-sectional investigation." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5371.
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Doctoral counselor education programs are charged to develop effective researchers; however, limited investigations have examined research constructs in counselor educators-in-training. Therefore, this study will investigate a national sample of doctoral counselor education students' levels of research self-efficacy (Research Self-Efficacy Scale; Greeley, et. al 1989), interest in research (Interest in Research Questionnaire; Bishop & Bieschke, 1994), and research mentoring (Research Mentoring Experiences Scale; Hollingsworth & Fassinger, 2002). A cross-sectional, correlational research design will be used to test if doctoral counselor education students' year of preparation (1st, 2nd, or 3rd year) predicts their research self-efficacy, interest in research, and research mentoring scores. In addition, the study will investigate if doctoral students' research practices, (e.g., publishing refereed journal articles, presenting papers at national conferences) correlates with their levels of the three research constructs. Limitations and implications for the study will be discussed.Ph.D.
Doctorate
Education and Human Performance
Education Counselor Education
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Ling, Kit Tong, and 凌傑棠. "A cross-sectional study of skeletal age, dental age, body height, bodyweight and sexual maturity of 12 years old Southern Chinese boys." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B38628272.
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Vraníková, Radmila. "Současné možnosti regenerace veřejných prostorů v panelových sídlištích." Doctoral thesis, Vysoké učení technické v Brně. Fakulta architektury, 2013. http://www.nusl.cz/ntk/nusl-233245.
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is thesis deals with the new approach to solving the usage of the urban places located at the current build-up area of the block of flats. On experiences from long-term processing of concrete designs there are introduced principles and fundamentals for the regeneration of public places at block of flats, including new structure of functional areas. These principles and fundamentals will serve as the methodical aid for the public service, self-government and for the designers conversant with regeneration of public places.
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Keating, Diane Patrice. "The development of a community based survey methodology for use with children with oral communication impairment." Queensland University of Technology, 2002. http://eprints.qut.edu.au/15839/.
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BACKGROUND: Oral communication impairments (OCIs) are a common childhood problem with often long-term negative outcomes for both the child and society. Despite the growing body of knowledge about the epidemiology of this problem, the shift from traditional treatment approaches to population based approaches to management has been slow. One suggested reason for this is a lack of community based population data on such problems with which to plan services more broadly. AIM: The aim of this thesis is to contribute to the population knowledge of children with OCIs by developing and trialing a data collection method at a community level. LITERATURE REVIEW: One of the major issues in understanding OCIs from a population perspective is the disparate and often incongruent nature of epidemiological data reported in the literature. Five areas of epidemiological research were reviewed in order to critically evaluate the existing evidence base and identify gaps for further research. The five areas reviewed were: Prevalence (Regardless of the methodology used to collect prevalence data, OCIs have been described as a common childhood problem), Life Course (Children with OCIs often have ongoing communication problems and are at risk for poorer life outcomes in social, educational and occupational domains), Comorbidities (OCIs rarely occur in isolation and most children will have other developmental or health issues), Risk factors (There is no one easily definable cause of OCIs, however, genetic and environmental factors appear to increase the risk of OCI in the general population), and Service use (Only around half of children with recognised OCIs will access specialist intervention services).The review concluded that local community data measuring the 'burden', or impact, of the problem, comorbidities and service use in children with and without OCIs would assist in service planning. Therefore a methodology would need to be developed which addressed these issues.A further review of the literature considered this methodology development with specific reference to the issues of study design, sampling and identification of OCIs. The review concluded that a cross-sectional survey design of a community sample could provide the necessary data. Parent and teacher report was suggested as a method for identifying OCIs in surveys, however, a tool needed to be developed and trialed to ensure this method was effective, valid and reliable. PILOT STUDY: A survey tool for parents was designed which included the Child Health Questionnaire (PF - 28), questions relating to socio-demographic features, health and development conditions, service use and specifically developed questions regarding OCIs. The survey methodology was trialed in one school and one childcare centre. The results of the study were reviewed and suggestions made for methodological changes before a community trial was carried out. The reliability and validity of the questions designed to identify OCIs was assessed in a number of ways. Test-retest reliability of parent completed questionnaires proved to be good. Interrater reliability was examined by comparing parent and teacher responses. Parents and teachers agreed on identification of OCI in over 75% of cases for each of the OCIs studied. Criterion validity was assessed by comparing parent report to speech pathologist evaluation in a clinical sample and by comparing parent and teacher report to screening assessments of communication skills in a school sample. Both parents and teachers tended to over-identify children, however, when parent and teacher reports were considered together the validity approached that of the 'gold standard'. Construct validity was assessed by comparing reported OCIs with reports of other developmental conditions known to be commonly comorbid with OCIs. Once again using both parent and teacher report proved to be the most valid method of identifying OCIs using the developed tool. COMMUNITY STUDY: A targeted community survey of 3 to 7 year old children was conducted in a regional centre in Queensland, Australia. Children were sampled through schools and childcare centres. Information letters were distributed to the parents of 898 eligible children. Completed questionnaires were received for 397 children. Teachers completed questionnaires on 375 children which was 42% of the population sampled. Parents and teachers identified OCIs in 16% of the children. However, only 3% of the population were rated by parents or teachers as having severe problems. Over 70% of parents and teachers of children with a reported OCI rated the problem as having an impact on the child's life. Ratings of impact were not related to parent/teacher ratings of severity. Children with OCIs were reported to have significantly more health, developmental and behaviour problems than their peers. Children with OCIs were rated lower by their parents on most aspects of the Child Health Questionnaire (PF-28). In particular, parents reported impacts on their own time and family activities due to the child's problems. No significant differences were found between children with and without reported OCIs on any of the socio-demographic variables studied. Children with reported OCIs used more health and educational services than their peers. Around 60% of children with reported OCIs had seen a speech pathologist, but many parents had also sought advice from a range of other health and educational professionals. Those with two or more OCI conditions were more likely to have seen a professional, however socio-demographic variables did not generally predict service use. Parents reported that the type of service they chose was most commonly influenced by advice from a doctor or teacher. The limitations of this methodology for collecting this type of data are discussed. However despite these limitations data were collected which has major implications for the provision of population based services for children with OCI. CONCLUSION: This thesis has contributed to the understanding of children with OCIs by researching the development of a methodology to study this problem in a defined community sample. The information gained from the literature review and the community study were considered within two models of service provision. The models encompass service delivery from individualised to more population based approaches to the management of OCIs in children. From these models, specific suggestions for the community involved in the study were discussed. This thesis, therefore, provided a survey methodology that is resource efficient in the collection of community data useful in suggesting improved services for children with oral communication impairments.
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Chapman, Benjamin P. "Emotional Intelligence at Mid Life: A Cross Sectional Investigation of Structural Variance, Social Correlates, and Relationship to Established Personality and Ability Taxonomies." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4894/.
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Emotional Intelligence (EI) has been relatively unstudied after young adulthood. Yet there are a variety of reasons to expect that EI may be different at mid life than in young adulthood. Normative life experiences may lead to increases in EI, and as the array of different environments and experiences increases with age, one might expect greater individual differences in EI. Similarly, if EI is located somewhere at the intersection of personality and intelligence, as some have speculated, it may follow a course of structural differentiation similar to cognitive abilities. EI may be more closely linked to social variables such as loneliness and friendships at mid life, and its relation to established personality and ability factors such as the Big Five (Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness) and fluid and crystallized abilities may also vary with age. These hypotheses were investigated in samples of 292 young adults and 246 mid life adults, using the Schutte Self Report Emotional Intelligence Inventory, the NEO-Five Factor Personality Inventory, markers of crystallized and fluid ability from Horn's Crystallized/Fluid Sampler, and a variety of other measures. Mid life adults scored higher on overall EI scores, but evidenced no greater range of individual differences than did young adults. A series of exploratory and confirmatory factor analyses revealed no greater differentiation in the mid life sample either among dimensions of EI or between EI and personality and intelligence variables. Finally, EI appeared equally predictive of social variables in each sample. Results are discussed from the perspective of lifespan and aging literature on emotion, personality, and social functioning. Qualifications for the inference of age-related change in cross sectional designs are considered, along with advantages and disadvantages of factor-analytic and covariance structure modeling methodology. Implications, particularly for psychotherapy with each age group, are discussed.
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Ardeleanu, Dorian. "What are the factors that influence the level of tourism development? : Research based on 130 countries." Thesis, Uppsala universitet, Institutionen för samhällsbyggnad och industriell teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445277.
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This study is based on data regarding the social, economic, and demographic characteristics of 130 countries, and uses fixed effects estimation for the model analysis. It demonstrates that tourism development represents a complex process, which requires the implication of a multitude of stakeholders. Macroeconomic factors, such as GDP per capita growth and economic openness, are having a positive impact because they benefit private ownership and motivate people to open tourism-related businesses. Overall, higher carbon dioxide emissions and worse safety are having a negative effect over tourism development. Human development factors, such as education, are generally beneficial to the long-term tourism growth because they serve as positive externalities. Clustering the initial dataset based on various economic, demographic and social factors brought several new conclusions. Particularly, GDP per capita growth is not an important tourism development factor among developed countries, whereas the dummy variable for the year 2010 is a substantial one. Education and economic freedom are particularly important regressors for post-socialist states. The former is also crucial among African countries and in the Latin American region, where safety has also an essential impact over tourism development. Finally, tourism in small states would benefit the most from lower emissions,whereas in big states the best strategy for the policymaker would be to increase safety measures.
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So, Lai-ying Lisa, and 蘇麗英. "A cross-sectional study of skeletal, dental, physical growth and sexual maturity of 12-year-old southern Chinese girls in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B3195389X.
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Johansson, Amanda, and Josefin Ohlsson. "Vad påverkar priserna på bostadsmarknaden? : En tvärsnittsstudie om prisutvecklingen på småhus över Sveriges kommuner från 1996 till 2015." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-32373.
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En studie gjord av den internationella mäklarfirman Knight Frank placerar den svenska bostadsmarknaden på en fjärde plats i rankingen över världens hetaste bostadsmarknader. Många kommuner i Sverige har upplevt en kraftig prisutveckling på bostäder de senaste åren och det är därför viktigt att studera den svenska bostadsmarknaden och dess priser. Syftet med denna studie är således att undersöka vilka faktorer det är som påverkar prisutvecklingen på småhus i Sveriges kommuner. Studien är en tvärsnittsstudie över 288 kommuner där förändringen i bostadspriserna studeras under åren 1996 till 2015. Studien har utförts med hjälp av en statistisk metod i form av en regressionsanalys som har delats upp i två perioder: 1996 till 2005 och 2006 till 2015. Den beroende variabeln är prisutvecklingen på bostäder och de förklarande variablerna är utbudet av bostäder, förvärvsinkomst, arbetslöshet, befolkning och kommunalskatt. Regressionsanalysen visar att befolkningsökningen är den variabel som är signifikant med prisutvecklingen under den första perioden och alla förklarande variabler utom kommunalskatten ärsignifikanta under den andra perioden. Genom den deskriptiva statistiken kan vi även se ett samband mellan utbud av bostäder per invånare och prisutvecklingen på bostäder.According to a study by the international real estate firm Knight Frank, the Swedish housing market is in a fourth place in the rankings of the world's hottest housing markets. Many municipalities in Sweden have experienced a strong price trend in housing during recent years. Therefore, it is important to study the Swedish housing market and its prices. The purpose of the study is to examine which factors affect the increase in house prices in Sweden's municipalities. We have made a cross-sectional study of 288 municipalities and studying the change in housing prices from year 1996 to 2015. The study was conducted using a statistical method in form of a regression analysis that has been divided into two time periods: 1996 to 2005 and 2006 to 2015. The dependent variable is the change in housing prices and the explanatory variables are the supply of housing, professional income, unemployment rate, population rate and municipal taxes. The regression analysis show that population growth is the variable that is significant to the price trend during the first period. All the explanatory variables except municipal taxes is significant during the second period. Through the descriptive statistics, we can also see a connection between supply of housing per capita and increases in house prices.
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Johann, Victoria Anne. "Development and Implementation of an Automated SEM-EDX Routine for Characterizing Respirable Coal Mine Dust." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73367.
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This thesis describes the development and use of a computer-automated microscopy routine for characterization of respirable dust particles from coal mines. Respirable dust in underground coal mining environments has long been known to pose an occupational health hazard for miners. Typically following years of exposure, coal workers' pneumoconiosis (CWP) and silicosis are the most common disease diagnoses. Although dramatic reductions in CWP and silicosis cases were achieved across the US between about 1970-1999 through a combination of regulatory dust exposure limits, improved ventilation and dust abatement practices, a resurgence in disease incidence has been noted more recently – particularly in parts of Appalachia. To shed light on this alarming trend and allow for better understanding of the role of respirable dust in development of disease, more must be learned about the specific characteristics of dust particles and occupational exposures.
This work first sought to develop an automated routine for the characterization of respirable dust using scanning electron microscopy with energy dispersive x-ray (SEM-EDX). SEM-EDX is a powerful tool that allows determination of the size, shape, and chemistry of individual particles, but manual operation of the instrument is very time consuming and has the potential to introduce user bias. The automated method developed here provides for much more efficient analysis – with a data capture rate that is typically 25 times faster than that of the manual method on which it was based – and also eliminates bias between users. Moreover, due to its efficiency and broader coverage of a dust sample, it allows for characterization of a larger and more representative number of particles per sample. The routine was verified using respirable dust samples generated from known materials commonly observed in underground coal mines in the central Appalachian region, as well as field samples collected in this region. This effort demonstrated that particles between about 1-9μm were accurately classified with respect to defined chemical categories, and suggested that analysis of 500 particles across a large area of a sample filter generally provides representative results.
The automated SEM-EDX routine was then used to characterize a total of 210 respirable dust samples collected in eight Appalachian coal mines. The mines were located in three distinct regions (i.e., northern, mid-central and south-central Appalachia), which differed in terms of primary mining method, coal seam thickness and mining height, and coal and/or rock mineralogy. Results were analyzed to determine whether number distributions of particle size, aspect ratio, and chemistry classification vary between and within distinct mine regions, and by general sampling location categories (i.e., intake, feeder, production, return). Key findings include:
1) Northern Appalachian mines have relatively higher fractions of coal, carbonate, and heavy mineral particles than the two central Appalachian regions, whereas central Appalachian mines have higher fractions of quartz and alumino-silicate particles.
2) Central Appalachian mines tended to have more mine-to-mine variations in size, shape, and chemistry distributions than northern Appalachian mines.
3) With respect to particle size, samples collected in locations in the production and return categories have the highest percentages of very small particles (i.e., 0.94-2.0μm), followed by the feeder and then the intake locations.
4) With respect to particle shape, samples collected in locations in the production and return categories have higher fractions of particles with moderate (i.e., length is 1.5 to 3x width) to relatively high aspect ratios (i.e., length is greater than 3x width) compared to feeder and intake samples.
5) Samples with relatively high fractions of alumino-silicates have higher fractions of particles with moderate aspect ratios than samples with low alumino-silicate fractions.
6) Samples with relatively high fractions of quartz particles have higher fractions of particles with moderate aspect ratios and higher percentages of very small particles than samples with no identified quartz particles.
7) Samples with high fractions of carbonates have higher percentages of particles with relatively low aspect ratios (i.e., length and width are similar) than samples with no identified carbonate particles.Master of Science
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Xu, Danhua. "A Study of magnetic thin film corrosion mechanisms with the development of a novel on-line coupling technique and with Microstructural and Magnetic Cross-Sectional Profiling Techniques." Full text open access at:, 2008. http://content.ohsu.edu/u?/etd,648.
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Hamit-Haggar, Mahamat. "Essays on environmental and development economics." Thesis, Université Clermont Auvergne (2017-2020), 2018. http://www.theses.fr/2018CLFAD005/document.
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Cette thèse comporte quatre essais et porte sur les questions fondamentales sur la relation entre l’environnement et le développement économique. Le premier chapitre cherche à identifier les déterminants individuels et contextuels qui affectent la volonté de contribuer des gens à la lutte contre la pollution environnementale. Nos résultats révèlent que les individus riches, les personnes éduquées ainsi que les personnes possédant des valeurs post-matérialistes sont plus susceptibles d’être préoccupées par la pollution environnementale. On remarque que la caractéristique du pays de ces individus affecte leur volonté à contribuer. Ainsi, dans les pays à forte démocratie avec une forte stabilité gouvernementale, les individus sont réticents à faire des dons pour prévenir les dommages environnementaux. Le deuxième chapitre examine la relation entre la croissance économique et la dégradation de l’environnement en s’interrogeant sur la relation U inversée de Kuznets. Nos résultats empiriques ne révèlent aucune preuve de ladite relation. Cependant, nous notons l’existence d’une relation non linéaire entre la croissance économique et la dégradation de l’environnement. Les émissions ont tendance à augmenter un rythme plus rapide dans les premiers stades de la croissance économique puis dans les dernière étapes, cette hausse persiste mais à un rythme plus lent. Le troisième chapitre étudie la relation de causalité de long terme entre la consommation d'énergie propre et la croissance économique dans un groupe de pays de l’Afrique subsaharienne. Le résultat révèle l'existence d'une relation d'équilibre à long terme entre la consommation d'énergie propre et la croissance économique. En outre, la dynamique de court terme et de long terme indiquent une relation de causalité à la Granger unidirectionnelle de la consommation d'énergie propre vers la croissance économique sans aucun effet rétroactif. Le dernier chapitre de cette thèse cherche à investiguer sur la convergence des émissions de gaz entre les provinces canadiennes. L'étude montre que les émissions de gaz des provinces canadiennes sont caractérisées des convergences de clubs. En d'autres termes, on détecte l'existence d'une segmentation des émissions entre les provinces canadiennesThis thesis comprises four empirical essays on environmental and development economics. In the first chapter, we examine to what extent individual and contextual level factors influence individuals to contribute financially to prevent environmental pollution. We find that rich people, individuals with higher education, as well as those who possess post-materialist values are more likely to be concerned about environmental pollution. We also observe the country in which individuals live matter in their willingness to contribute. More precisely, we find democracy and government stability reduce individuals’ intention to donate to prevent environmental damage mainly in developed countries. The second chapter deals with the relation between economic growth and environmental degradation by focusing on the issue of whether the inverted U-shaped relation exist. The study discloses no evidence for the U-shaped relation. However, the empirical result points toward a non-linear relationship between environmental degradation and economic growth, that is, emissions tend to rise rapidly in the early stages with economic growth, and then emissions continue to increase but a lower rate in the later stages. The third chapter investigates the long-run as well as the causal relationship between energy consumption and economic growth in a group of Sub-Saharan Africa. The result discovers the existence of a long-run equilibrium relationship between clean energy consumption and economic growth. Furthermore, the short-run and the long-run dynamics indicate unidirectional Granger causality running from clean energy consumption to economic growth without any feedback effects. The last chapter of this thesis concerns with convergence of emissions across Canadian provinces. The study determines convergence clubs better characterizes Canadian’s emissions. In other words, we detect the existence of segmentation in emissions across Canadian provinces
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Doyle, Ina-Merle [Verfasser], Jacob [Akademischer Betreuer] Spallek, and Oliver [Akademischer Betreuer] Razum. "Determinants of diet in pregnancy: development of an explanatory model and application to cross-sectional data from a social-epidemiological birth cohort study / Ina-Merle Doyle ; Jacob Spallek, Oliver Razum." Bielefeld : Universitätsbibliothek Bielefeld, 2017. http://d-nb.info/113642217X/34.
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Wallerstein, Lilian França. "Influência dos treinamentos de força e potência nas adaptações neurais, morfológicas e na funcionalidade em idosos." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/39/39132/tde-19082010-164416/.
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Apesar das perdas provocadas pela sarcopenia, o sistema neuromuscular do idoso ainda mantém parte da sua plasticidade. No entanto, as adaptações promovidas pelos treinamentos de força (TF) e de potência (TP) não foram totalmente elucidadas, assim como se existem diferenças entre essas adaptações nessa população. Para responder tais questões, 43 idosos (63,8 ± 4,0 anos; 67,2 ±13,4kg e 160,2 ±8,4cm), inexperientes em treinamento com pesos e independentes participaram desse estudo. Os voluntários foram distribuídos em três grupos: GF (n= 14; 70 a 90% de 1RM), GP (n= 16; 30 a 50% de 1RM) e GC (n= 13, não treinou). Durante 16 semanas o GF e o GP realizaram duas sessões de treino semanalmente. Os resultados significantes foram: aumento de 42,7% em GF e 33,8% em GP no teste de 1RM (leg press) e 31% em GF e 25,4% em GP (chest press); aumento de 6% em GF e 3,6% em GP na ASTq; aumento de 22,4% em GF e 17,1% em GP na CVIM e uma diminuição de 28% em GF e 32% em GP no REM. Não houve diferenças significativas entre GF e GP nas variáveis analisadas. Nenhum dos grupos apresentou aumento no sinal eletromiográfico nem na TDF. Não houve alteração significativa na funcionalidade. Portanto, ainda que com características distintas, o TF e o TP são similares em relação às adaptações analisadas, equiparando-se como estratégias de treinamento eficazes no combate à sarcopenia e seus efeitosIn spite of sarcopenia-induced losses, elderly peoples neuromuscular system keeps its plasticity. However, strength and power training-induced adaptations have not been completely elucidated. It also unknown if these adaptations are related to elderly functionality. Fourty three healthy and independent old men and women (63.8 ± 4.0 yrs; 67.2 ±13.4kg e 160.2 ±8.4cm) with no resistance training experience volunteered for this study. Participants were randomly distributed into three groups: GF (n= 14; 70 - 90%-1RM), GP (n= 16; 30 - 50%-1RM) e GC (n= 13, no training). GF and GP trained twice a week for 16 weeks. Leg-press (42.7% in GF and 33.8% in GP) and chest-press 1-RM (31% in GF and 25.4% in GP), quadriceps cross sectional area (6% in GF and 3.6% in GP), maximal voluntary isometric contraction (22.4% in GF and 17.1% in GP) were significantly increased in both groups. Electromechanical delay decreased 28% in GF and 32% in GP. There were no significant differences between groups. EMG and rate of force development did not change throughout the training period. Only main effect of time was observed for the functional tests. These results suggest that even with different characteristics, both strength and power training induce similar neuromuscular adaptations. Thus, both training regimens are equally effective in preventing and treating sarcopenia
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Arsenault, Caroline. "Development of a new design method for the cross-section capacity of steel slender I-sections." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/33548.
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Ce mémoire présente la recherche effectuée concernant le développement d’une nouvelle méthode de dimensionnement spécifiquement dédiée aux sections en acier en I très élancées par l’entremise de l’Overall Interaction Concept (O.I.C.). Le comportement en section est défini par deux comportements extrêmes, soit la résistance et l’instabilité pure. Les méthodes de calculs couramment utilisées dans les normes nécessitent d’abord de classer la section pour ensuite calculer les propriétés de la section efficace. Ces méthodes comportent quelques incohérences ainsi qu’un manque de précision. Une nouvelle méthode de dimensionnement qui considère la section entière – qui ne requiert donc plus de calculer les propriétés efficaces – et l’interaction entre les plaques peut et doit être développée. La considération des imperfections tant géométriques que matériels permet d’atteindre une plus grande précision, et l’utilisation d’outils numériques performants permet également d’augmenter l’efficacité des calculs. L’Overall Interaction Concept permet de calculer rapidement la résistance en section en fonction de l’élancement relatif généralisée, au moyen de courbes d’interaction. L’objectif principal de cette maîtrise est donc d’adapter l’O.I.C. aux sections ouvertes en I très élancées, comme celles utilisées dans le domaine des ponts, soumises à des cas de chargement simples (compression pure ou flexion d’axe fort seulement). Un modèle numérique a d’abord été développé en réalisant entre autres une étude de densité de maillage et des études sur les imperfections géométriques et matérielles à utiliser. Cette dernière étude doit être fait minutieusement et les choix effectués doivent être justifiés convenablement puisqu’aucune donnée expérimentale n’est disponible pour calibrer le modèle. Une fois le modèle fiable développé, une campagne numérique comptabilisant plus de 3500 simulations a été faite, permettant ainsi d’analyser l’effet de certains paramètres sur la résistance en section. Sur la base de ces simulations numériques, une proposition de méthode de dimensionnement a été faite en fonction des paramètres déterminants, c’est-à-dire le choix des contraintes résiduelles, du type de chargement et des propriétés géométriques géométrique de la section par l’entremise du paramètre μ. La formulation d’Ayrton-Perry a été adaptée pour définir les courbes d’interaction servant à prédire la résistance. En parallèle au développement de la méthode, des études ont été effectuées pour comparer les résultats obtenus pour la résistance en section selon les normes canadiennes, américaines et européennes avec les résultats obtenus numériquement. Ainsi, il a été possible d’observer la capacité d’amélioration des méthodes couramment utilisées tant en termes de précision que de simplicité.This dissertation presents research developments related to the design of very slender open steel sections through the Overall Interaction Concept (O.I.C.). The cross-sectional behaviour is defined by two extreme, ideal behaviours: pure resistance and pure instability. Methods used in the current standards need to classify the section, and, in the case of bridge sections, to calculate effective properties. This method presents some inconsistencies, as well as accuracy issues. A new design approach considering the whole section – and by that interaction between plates – was developed. By including the geometrical and material imperfections, more accuracy can be reached, and using numerical tools can increase the efficiency as well. The Overall Interaction Concept allows to calculate fast the resistance of a cross-section by using a generalized relative slenderness, so-called interaction curves. The main aim of this master is to adapt the O.I.C. to very slender open I-sections subjected to simple load cases (major-axis bending moment and pure compression). A numerical model has been developed by carry out mesh density study, and imperfections studies. This part had to be carefully detailed and assessed since no experimental data can be available to calibrate the numerical models. Once a reliable model was settled, a numerical campaign of more than 3500 simulations has been undertaken, allowing to analyse the effects of many key parameters. Based on these numerical simulations, design proposals were made as based on the identified governing parameters, i.e. the residual stresses pattern, load case and geometrical properties by means of newly-proposed parameter μ. An extension of the Ayrton-Perry formulation is finally used to define crosssection interaction curves. Besides, systematic comparison with Canadian, American and European Standards are done with the results from numerical simulations allowing to observe the improvement capacity of the current methods, in terms of accuracy and simplicity.
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Chousakos, Kyriakos. "Development of an econometric model for dynamic management of recession risk in equity portfolios : construction of an empirical measure of time-varying recession risk : estimation of cross-sectional differences in recession risk exposure among equities and associated differences in risk premia." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66174.
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Thesis (M. Fin.)--Massachusetts Institute of Technology, Sloan School of Management, Master of Finance Program, 2011.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 31).
Recessions are an inherent part of economic cycles. During the last decade we have experienced two extended periods of significant economic slowdown accompanied by major downturns in most of the asset classes and especially in equities. Investors during recessions suffer from severe losses and diversification does not provide the optimal solution. Through the development of an econometric model for dynamic management of recession risk in equity portfolios based on an empirical measure of timevarying recession risk, I plan to estimate cross-sectional differences in recession risk exposure among equities and associated differences in risk premia. The analysis is expanded on an industry level, where among industries clear patterns are identified in terms recession risk exposure. In the last part of the report I explore the possibility of creating a trading strategy which is able to generate significant performance benefiting from the market underreaction to recession risk.
by Kyriakos Chousakos.
M.Fin.
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Paquet, Jeanne. "Development of a new design method for the cross-section capacity of steel open sections at high temperatures." Master's thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/69308.
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À hautes températures, les propriétés de l’acier sont affectées et sa résistance est donc moindre que sa résistance à température ambiante. Des méthodes de calculs différentes doivent donc être utilisées pour prédire la résistance dans la situation exceptionnelle d’incendie. Les normes actuelles proposent des méthodes simplifiées pour prédire la résistance de l’acier à haute température. Toutefois, ces méthodes sont inspirées des méthodes de dimensionnement à froid et ne sont donc généralement pas adéquates pour prédire de façon précise la résistance des éléments en situations d’incendie. Ce mémoire présente les recherches effectuées pour la proposition d’une nouvelle méthode de calcul pour les sections d’acier ouvertes soumises à de hautes températures en utilisant l’Overall Interaction Concept (O.I.C). Cette méthode est basée sur l’interaction entre la résistance et la stabilité et permet de considérer les imperfections géométriques et matérielles. Entre autres choses, l’avantage de cette nouvelle méthode est qu’elle permet d’obtenir des résultats précis et de conserver une continuité entre les prédictions. Un modèle numérique a été utilisé pour prédire la résistance de l’acier à hautes températures. Ce modèle a été validé en comparant les résultats avec des résultats expérimentaux. À la suite de la validation, le modèle a été utilisé pour conduire des simulations dans lesquelles plusieurs géométries, températures, limites élastiques et cas de chargement ont été considérés. Les résultats ont ensuite été utilisés pour proposer de nouvelles équations dans le format O.I.C. La performance de la nouvelle proposition a été évaluée et comparée avec la performance de normes existantes. Cette évaluation a permis de conclure que la proposition donne des résultats beaucoup plus précis. Finalement, l’évolution du comportement de l’acier entre la température ambiante et les hautes températures a brièvement été analysé. Puisque ce point est abordé de façon sommaire, il ouvre la porte vers de futures études sur le sujet.At high temperatures, steel suffers from great lossesin strength and stiffness. Different design methods must therefore be considered to predict the resistance of steel in the exceptional situation of fire. Current standards propose simplified methods to predict the resistance of steel at high temperatures. However, these methods are inspired by steel design equations used at room temperature and are therefore generally not suitable to predict accurately the resistance of steel elements in fire situation. This thesis presents research investigations pursued to propose a new design method for open steel cross-sections subjected to high temperatures by means of the Overall InteractionConcept (O.I.C.). This calculation method is based on the interaction between resistance and stability and allows to consider geometrical and material imperfections. The advantage of this new calculation method is that it allows to obtain precise results and to keep continuity between predictions contrarily to standards that use the cross-section classification. A numerical model, initially developed for open steel cross-sections at ambient temperature,was improved to predict the resistance of steel at high temperatures. It was then verified against experimental test results to ensure its accuracy. After validation, the numerical model was used to conduct simulations using different geometries, temperatures, yield limits andload cases. Results were then used to formulate new design proposals for cross-sections at high temperatures in the O.I.C. format. The performance of the new proposal was then evaluated et compared with the performance of existing standards. This evaluation allowed to conclude that the proposition is much more accurate than existing standards. Finally, the evolution of the behaviour of steel between cold and high temperature was briefly analysed. As this point was only briefly discussed, it opens the door for future studies on the subject.
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Purcel, Alexandra-Anca. "Economic Development and Environmental Quality Nexus in Developing and Transition Economies." Thesis, Université Clermont Auvergne (2017-2020), 2020. http://www.theses.fr/2020CLFAD013.
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Cette thèse aborde l'un des sujets les plus discutés et en vogue dans le domaine de l'économie, à savoir le lien entre le développement économique et la qualité environnementale. En particulier, on met l’accent sur les effets du développement économique—tant dans ses dimensions économique, sociale que politique—sur la qualité de l'environnement pour les économies en développement et en transition. Le chapitre I, divisé en trois phases clés, à savoir la revue de la littérature théorique, la partie empirique et la revue de la littérature empirique, contribue à la littérature en donnant diverses informations sur le lien entre la croissance économique et la pollution de l'environnement dans les économies en développement et en transition. Globalement, les résultats révèlent que des études empiriques récentes, parvenant à réduire certaines lacunes suggérées par la théorie, pourraient en effet indiquer un certain consensus sur la relation entre la croissance et la pollution, à savoir la validité de l'hypothèse de la Courbe de Kuznets Environnementale (CKE). Le chapitre II examine le lien pollution-croissance dans les pays d'Europe Centrale et Orientale (PECO), en ajoutant à la littérature empirique l’utilisation de l'hypothèse étendue de l'CKE comme cadre théorique. D'une part, il révèle un lien de croissance non linéaire entre le PIB et le CO2 agrégé, qui est fortement robuste pour différents estimateurs et variables de contrôle. En revanche, l'analyse au niveau des pays révèle que la relation entre le PIB et le CO2 se caractérise par une grande diversité dans les PECO. Ainsi, malgré une tendance globale à la hausse, certains PECO ont réussi à assurer à la fois un PIB plus élevé et une réduction des émissions de CO2. Du point de vue politique, les décideurs de l'UE pourraient accorder plus d'attention à ces pays, c'est-à-dire envisager une intégration plus rigoureuse des hétérogénéités des pays et, en même temps, soutenir la croissance économique sans nuire à l'environnement. Le chapitre III étudie la réponse des émissions de CO2 agrégées et sectorielles résultant des perturbations externes du PIB et de l'urbanisation, en supposant un canal de transmission qui intègre deux des éléments clés utilisés dans la lutte contre la dégradation de l'environnement—les énergies renouvelables et l'efficacité énergétique. Les résultats, robustes à plusieurs spécifications alternatives, indiquent que la production globale, l'urbanisation et l'intensité énergétique augmentent les émissions totales de CO2, tandis que les énergies renouvelables ont l'effet inverse. Par ailleurs, en ce qui concerne la réponse du CO2 aux chocs de production et d'urbanisation, le modèle suggère que ces pays atteindront le seuil maximum qui conduirait à un changement de la tendance des émissions à la baisse. Cependant, les résultats varient en fonction du niveau de revenu et du statut des pays sur la ratification/l'adhésion au Protocole de Kyoto. Ensuite, l'analyse sectorielle montre que les transports, les bâtiments et les secteurs non-combustion sont plus susceptibles de contribuer à l'augmentation des niveaux futurs de CO2. En général, ce chapitre peut fournir des informations précieuses sur les perspectives de durabilité environnementale dans les pays en développement. Le chapitre IV explore les effets de la stabilité politique sur la dégradation de l'environnement, donnant une perspective renouvelée sur ce sujet dans les pays en développement. Il montre qu'une évolution non linéaire en forme de cloche décrit la relation entre les variables au niveau agrégé. De plus, bien que ce résultat reste stable pour plusieurs spécifications alternatives, nous identifions des hétérogénéités significatives dans les caractéristiques distinctes des pays et les mesures alternatives de pollution. En outre, des estimations désagrégées révèlent des schémas contrastés pour la relation entre le CO2 et la stabilité politique. (...)This thesis tackles one of the most debatable and in vogue topics in economics, namely the economic development and environmental quality nexus. Notably, it studies the economic development's effects—in terms of its economic, social, and political dimensions—on the environmental quality for developing and transition economies. Chapter I, which is divided into three key phases, namely theoretical review, empirical exercise, and empirical review, contributes to the literature by giving various insights regarding the link between economic growth and environmental pollution in developing and transition economies. Overall, it reveals that the recent empirical studies, indeed, succeeding to curtail some of the deficiencies suggested by theoretical contributions, might indicate a certain consensus regarding pollution-growth nexus and Environmental Kuznets Curve (EKC) hypothesis validity. Chapter II examines the pollution-growth nexus in Central and Eastern European (CEE) countries, adding to the related empirical literature using the extended EKC hypothesis as a theoretical background. On the one hand, it unveils an increasing nonlinear link between GDP and CO2 at the aggregate level, which is powerfully robust to different estimators and control variables. On the other hand, the country-level analysis reveals that the relationship between GDP and CO2 is characterized by much diversity among CEE countries. Thus, despite an aggregated upward trend, some CEE countries managed to secure both higher GDP and lower CO2 emissions. From a policy perspective, EU policymakers could pay more attention to these countries and amend the current unique environmental policy to account for country-heterogeneities to support economic growth without damaging the environment. Chapter III investigates the aggregated and sector-specific CO2 emissions' responsiveness following exogenous shocks to growth and urbanization, considering a transmission scheme that incorporates two of the widely used instruments in mitigating environmental degradation—renewables and energy efficiency. First, robust to several alternative specifications, the results indicate that output, urbanization, and energy intensity increase the aggregated CO2 emissions, while renewable energy exhibits an opposite effect. Moreover, regarding the CO2 responsiveness in the aftermath of output and urbanization shocks, the pattern may suggest that these countries are likely to attain the threshold that would trigger a decline in CO2 emissions. However, the findings are sensitive to both countries' economic development and Kyoto Protocol ratification/ascension status. Second, the sector-specific analysis unveils that the transportation, buildings, and non-combustion sector exhibits a higher propensity to increase the future CO2 levels. Generally, this chapter may provide useful insights concerning environmental sustainability prospects in developing states. Chapter IV explores the effects of political stability on environmental degradation, giving a renewed perspective on this topic in developing states. It shows that a nonlinear, bell-shaped pattern characterizes the relationship between variables at the aggregate level. Moreover, while this result is robust to a broad set of alternative specifications, significant heterogeneities are found regarding countries' distinct characteristics and alternative pollution measures. Besides, the country-specific estimates unveil contrasting patterns regarding the relationship between CO2 and political stability. Broadly speaking, the findings suggest that both the formal and informal sides of political stability play a vital role in mitigating CO2 pollution in developing countries, and may provide meaningful insights for policymakers. (...)
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Ffolliott, Peter F., Daniel G. Neary, and Gerald J. Gottfried. "A Brief History of the Hydrology Section." Arizona-Nevada Academy of Science, 2006. http://hdl.handle.net/10150/296616.
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Zarean, Mohsen. "Development of a simulation model for freeway weaving sections /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487330761218135.
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Chatzigeorgiadis, Filippos. "Development of Code for a Physical Optics Radar Cross Section prediction and analysis application." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sept%5FChatzigeorgiadis.pdf.
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Thesis (M.S. in Systems Engineering and M.S. in Electrical Engineering)--Naval Postgraduate School, Sept. 2004.Thesis advisor(s): David C. Jenn, D. Curtis Schleher. Includes bibliographical references (p. 125). Also available online.
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Heasman, Lindsay. "Nutritional and endocrine manipulation of development and thermoregulation in the newborn lamb." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285771.
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N'emedi, Zsolt V. "Development of performance sections for cold-formed steel residential construction." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08222009-040502/.
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Falkingham, Leslie T. "A study of the strategic environment of an R&D section within a larger organisation." Thesis, Cranfield University, 2001. http://hdl.handle.net/1826/838.
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This work addresses the problem of how an R&D section should decide on a strategy to guide its work when there is no strategic direction supplied from above by the company. The work includes a participant observer case study carried out over five years in a single R&D section, an analysis of research papers on the subject of management of section level R&D, and a review of textbooks on strategy, management and organisational behaviour.
From the case study it was concluded that the company itself formed the strategic environment which the strategy of the R&D section had to address, and that the section’s strategic environment was chaotic in the mathematical sense. From the review of management textbooks it was concluded that standard theories do not give usable guidelines for the manager in this situation. A theory was developed that R&D strategy can be thought about in four distinctly different ways. Publications concentrate on two of these, while the case study and surveys of practising managers revealed that the other two were more pertinent in practice.
The analysis of research papers was carried out using a newly developed technique, which showed that this body of literature is in a pre-paradigm state. The new technique was also used to show that the four different ways of thinking about R&D are present in the papers. The new literature analysis technique and the theory that R&D strategy can be thought about in four different way were tested by means of questionnaires filled in by authors of papers and by groups of R&D practitioners.
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Harris, Brandonn S. "Developmental consideration in athlete burnout an exploratory cross-sectional investigation in youth sport participants /." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5789.
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Schenkels, William H. "Development of thin section concrete for marine and aquaculture applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0007/MQ35524.pdf.
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Klimpel, Jill M. "Performing Modernity through Birth: Exploring High Rates of C-Sections in São Paulo, Brazil." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1321638880.
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Keuchguerian, Anait. "Haydn's early symphonic development sections and eighteenth-century theories of modulation." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20894.
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The tonal organization of the first-movement development sections of ten Haydn symphonies (nos. 1, 4, 6, 10, 13, 15, 19, 24, 31 and 72), all in D major composed between 1758 and 1765, is directly linked to eighteenth-century theories of modulation. The recent theoretical or musicological literature, with the exception of H. C. Robbins Landon's Haydn: Chronical and Works (1976--1980), has concentrated on Haydn's later high classical style generally ignoring these earlier works composed during his largely self-didactic, most formative years. After evaluating the analytical procedures established by Webster (1991), Wheelock (1992), Sisman (1993) and Haimo (1995) in chapter one, chapter two reviews tonal theories of some eighteenth-century writers. Chapter three presents analytical observations on the Morzin Symphonies (nos. 1, 15, 4, 10). Chapter four extends the discussion of chapter two and focuses on theoretical concepts that determine rank ordering of scale-steps in relation to the tonic. Chapter five focuses on tonal procedures employed in the developments of early Esterhazy symphonies (nos. 6, 13, 72, 24, 31) all of which feature cadentially-confirmed tonicizations of scale-step vi paired with recapitulatory from the main theme. (Abstract shortened by UMI.)
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Kim, Inn B. "Development and analysis of elastically tailored composite star shaped beam sections." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04062004-164703/unrestricted/kim%5Finn%5Fb%5F200312%5Fphd.pdf.
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Oryema, John Bosco. "Essays in Health and Development Economics." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6343.
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This dissertation examines three health and development issues in Sub-Saharan Africa. It analyzes the impact of policy changes and interventions on child mortality, household food consumption and cesarean section births. The study is motivated by the Millennium Development Goals and policies which could affect their achievement. In the first essay, I investigate the impact of debt relief on under-five mortality rate. A dynamic panel data estimator is employed in the analysis. The result shows that debt relief is associated with a statistically significant reduction in under-five mortality rate. I conclude that conditionality of debt relief or development aid can yield positive outcomes. The second essay examines the impact of private hospitals on the likelihood of cesarean section births in Uganda. The study is motivated by the increase in cesarean section births following the proliferation of private hospitals. The main method of estimation is a bivariate probit model. The results show that delivery at private hospitals increases the probability of cesarean section births, thus there is need to monitor private hospitals so that expectant mothers are protected from physician induced demand for avoidable cesarean section births. The final essay studies the impact of agricultural extension services on household food consumption in Uganda. The study exploits the variation in participation in the NAADS to estimate the impact of the program on household food consumption. I find that NAADS membership and training are associated with an increase in household food consumption, hence agricultural extension services can be used to reduce food insecurity. Policy recommendations and future studies are explored.
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Gao, Sasa. "Development of a new 3D beam finite element with deformable section." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI026/document.
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Le nouvel élément de poutre est une évolution d'un élément de Timoshenko poutre avec un nœud supplémentaire situé à mi-longueur. Ce nœud supplémentaire permet l'introduction de trois composantes supplémentaires de contrainte afin que la loi constitutionnelle 3D complète puisse être utilisée directement. L'élément proposé a été introduit dans un code d'éléments finis dans Matlab et une série d'exemples de linéaires/petites contraintes ont été réalisées et les résultats sont systématiquement comparés avec les valeurs correspondantes des simulations ABAQUS/Standard 3D. Ensuite, la deuxième étape consiste à introduire le comportement orthotrope et à effectuer la validation de déplacements larges / petites contraintes basés sur la formulation Lagrangienne mise à jour. Une série d'analyses numériques est réalisée qui montre que l'élément 3D amélioré fournit une excellente performance numérique. En effet, l'objectif final est d'utiliser les nouveaux éléments de poutre 3D pour modéliser des fils dans une préforme composite textile. A cet effet, la troisième étape consiste à introduire un comportement de contact et à effectuer la validation pour un nouveau contact entre 3D poutres à section rectangulaire. La formulation de contact est dérivée sur la base de formulation de pénalité et de formulation Lagrangian mise à jour utilisant des fonctions de forme physique avec l'effet de cisaillement inclus. Un algorithme de recherche de contact efficace, qui est nécessaire pour déterminer un ensemble actif pour le traitement de contribution de contact, est élaboré. Et une linéarisation constante de la contribution de contact est dérivée et exprimée sous forme de matrice appropriée, qui est facile à utiliser dans l'approximation FEM. Enfin, on présente quelques exemples numériques qui ne sont que des analyses qualitatives du contact et de la vérification de l'exactitude et de l'efficacité de l'élément de 3D poutre proposéThe new beam element is an evolution of a two nodes Timoshenko beam element with an extra node located at mid-length. That extra node allows the introduction of three extra strain components so that full 3D stress/strain constitutive relations can be used directly. The second step is to introduce the orthotropic behavior and carry out validation for large displacements/small strains based on Updated Lagrangian Formulation. A series of numerical analyses are carried out which shows that the enhanced 3D element provides an excellent numerical performance. Indeed, the final goal is to use the new 3D beam elements to model yarns in a textile composite preform. For this purpose, the third step is introducing contact behavior and carrying out validation for new 3D beam to beam contact with rectangular cross section. The contact formulation is derived on the basis of Penalty Formulation and Updated Lagrangian formulation using physical shape functions with shear effect included. An effective contact search algorithm is elaborated. And a consistent linearization of contact contribution is derived and expressed in suitable matrix form, which is easy to use in FEM approximation. Finally, some numerical examples are presented which are only qualitative analysis of contact and checking the correctness and the effectiveness of the proposed 3D beam element