Sediment samples were collected during three Ocean Network Canada expeditions to three hydrothermal vent fields at the Endeavour segment of the Juan de Fuca Ridge. The sediments were collected at variable distances (≤ 1340 m) from the vents fields by push core and, in some cases, by suction sampling from base of a chimney structure. The geochemistry of the sediments was investigated in order to understand their formation and the mass fluxes associated with these hydrothermal systems. Qualitative and quantitative approaches have been applied to deconvolve sediments bulk compositions into mass fractions of the different components that they are made up of. Qualitative analysis identified five different end-member components (hydrothermal plume particles, hydrothermal chimney fragments, terrigenous sediment, basalt fragments and organic matter). Using Q-mode factor analysis only three main components are identified. This is due to the geochemical similarity of (i) the hydrothermal plume particles and hydrothermal chimney fragments which are grouped together in this analysis, and (ii) the terrigenous sediment and basalt which are also grouped. Mass fractions of each component were calculated by using a numerical inversion procedure. The samples collected at the base of the chimney are composed of 20-40% plume particles and 56-72% chimney fragments with little contribution from other sediment sources. With increasing distance from the vent fields the contributions of these “hydrothermal” sources to the sediments drop rapidly to <50% within 90 m of the vents and <25% within 120 m from the vents. The mass fraction and chemical composition of the plume particles component, along with the estimates of the chemical flux out of hydrothermal vents and sedimentation rates in the area, are used to make a preliminary estimation of the chemical flux into the ocean. / Graduate / 0372 / 0996 / 0547 / armaghan.attar@gmail.com

<p>The research studies presented as this dissertation constitute a methodologically diverse and conceptually integrative approach to understanding impulsiveness in the context of cognitive control and decision making. Broadly, these findings address the validity of current conceptions of trait impulsiveness, relationships between those traits and brain or laboratory measures of cognitive control, and links between impulsive traits and economic decisions under conditions of delay or uncertainty. The findings presented in this thesis affirm the multidimensional nature of impulsiveness as a construct, and link individual differences in specific impulsive types to behavioral and neurobiological measures of control function. The nature of motor, attentional, and nonplanning impulsive types are contextualized by reference to evidence supporting a broad theory of behavioral control based on hierarchical organization of action, ranging from concrete acts to abstract plans and strategies. We provide evidence linking concrete forms of urgent/motor impulsiveness to behavior and brain activation during response-related control, and more abstract and future-oriented premedititative/nonplanning impulsiveness to strategic control signals in more rostral PFC. Finally, these findings are complemented by causal evidence from a neurostimulation study linking a contextual control network to risky decision making and attentional impulsiveness.</p> / Dissertation

隨著台灣經濟的成長與金融環境的變化，整個金融體系也做了很大的調整，其中新銀行的開放對整個金融體系的衝擊最大，整個銀行業的競爭情況更為激烈。本研究試圖透過實證分析來了解究竟開放新銀行這十幾年來，新舊銀行彼此在經營績效上的差異到底如何，又在哪些指標上有明顯的差異。除了比較短期財務性指標，再進一步分析長期財務性指標，作一更客觀的比較分析。 本研究採用因素分析方法萃取出財務性指標，作為衡量銀行間經營績效差異的方法，除綜合考量全體銀行績效比較分析外，並依據銀行成立時間的先後做為劃分標準，將銀行的經營型態劃分為新銀行與舊銀行兩大類，並研究兩者經營績效上的差異。本研究的研究範圍，是以90年底在台灣地區營業已滿三年的銀行為樣本，包括15家新銀行與17家舊銀行，共計32家銀行。研究期間自88年年初至90年年底，以每年的年資料進行研究。 實證結果如下：一、新銀行的短期經營績效與舊銀行的短期經營績效並沒有明顯差異。新銀行的加入的確為銀行業造成重大的衝擊，舊銀行無不積極提升競爭力，使得舊銀行與新銀行短期經營績效的差距由負轉正，但新舊銀行短期經營績效差異不大。二、舊銀行的長期經營績效與新銀行的長期經營績效並沒有明顯差異。舊銀行因新銀行加入競爭，雖致力提升經營績效，但因成立時間較早，受限於過去的經營方式，無法在短時間完全改變，使得舊銀行經營績效雖逐年改善，長期而言，新銀行經營績效仍略高於舊銀行，不過新舊銀行的長期經營績效差異不大。三、在全體樣本銀行的經營績效表現上，只有中信銀與台新銀的經營績效表現較好，其餘銀行的經營績效表現較不穩定。

<p>Despite the existence of extensive literature regarding risk management, there still seems to be lack of knowledge in identification of Critical Success Factors (CSFs) in this area. In this research Grounded Theory is implemented to identify CSFs in Risk Management Systems (RMS). Factor analysis and one-sample t-test are then used to refine and rank the CSFs based on the results of a survey which has been performed among Risk Management practitioners in various types of Swedish corporations. CSFs are defined from three different perspectives: (a) the factors that have influence on the inclination and readiness of corporation for implementing RMS. (b) the factors that are important during the design and implementation of RMS in corporation and can significantly affect the success of RMS design and implementation and (c) the factors that are crucially important to successfully run, maintain and administrate RMS after the closure of the project of RMS design and Implementation.</p><p>This systematic approach towards understanding the taxonomy of the success dimension in RMS is important for re-enforcing effective risk management practices.</p>

Dynamic panel data models are widely used by econometricians to study over time the economics of, for example, people, firms, regions, or countries, by pooling information over the cross-section. Though much of the panel research concerns inference in stationary models, macroeconomic data such as GDP, prices, and interest rates are typically trending over time and require in one way or another a nonstationary analysis. In time series analysis it is well-established how autoregressive unit roots give rise to stochastic trends, implying that random shocks to a dynamic process are persistent rather than transitory. Because the implications of, say, government policy actions are fundamentally different if shocks to the economy are lasting than if they are temporary, there are now a vast number of univariate time series unit root tests available. Similarly, panel unit root tests have been designed to test for the presence of stochastic trends within a panel data set and to what degree they are shared by the panel individuals. Today, growing data certainly offer new possibilities for panel data analysis, but also pose new problems concerning double-indexed limit theory, unobserved heterogeneity, and cross-sectional dependencies. For example, economic shocks, such as technological innovations, are many times global and make national aggregates cross-country dependent and related in international business cycles. Imposing a strong cross-sectional dependence, panel unit root tests often assume that the unobserved panel errors follow a dynamic factor model. The errors will then contain one part which is shared by the panel individuals, a common component, and one part which is individual-specific, an idiosyncratic component. This is appealing from the perspective of economic theory, because unobserved heterogeneity may be driven by global common shocks, which are well captured by dynamic factor models. Yet, only a handful of tests have been derived to test for unit roots in the common and in the idiosyncratic components separately. More importantly, likelihood-based methods, which are commonly used in classical factor analysis, have been ruled out for large dynamic factor models due to the considerable number of parameters. This thesis consists of four papers where we consider the exact factor model, in which the idiosyncratic components are mutually independent, and so any cross-sectional dependence is through the common factors only. Within this framework we derive some likelihood-based tests for common and idiosyncratic unit roots. In doing so we address an important issue for dynamic factor models, because likelihood-based tests, such as the Wald test, the likelihood ratio test, and the Lagrange multiplier test, are well-known to be asymptotically most powerful against local alternatives. Our approach is specific-to-general, meaning that we start with restrictions on the parameter space that allow us to use explicit maximum likelihood estimators. We then proceed with relaxing some of the assumptions, and consider a more general framework requiring numerical maximum likelihood estimation. By simulation we compare size and power of our tests with some established panel unit root tests. The simulations suggest that the likelihood-based tests are locally powerful and in some cases more robust in terms of size. / Solving Macroeconomic Problems Using Non-Stationary Panel Data

The aim of this thesis is to investigate empathy for persons from ethnical groups different than one’s own, an ability called ethnocultural empathy. A scale measuring ethnocultural empathy was translated and validated for a Swedish context and tested in a student sample, a majority of which were healthcare students. Three studies were performed. In study I, the validity and reliability of a Swedish translation of the Scale of Ethnocultural Empathy (SEE) was investigated (N=326). The purpose of study II was to investigate the association between basic empathy as measured by the Interpersonal Reactivity Index (Davis, 1983) and ethnocultural empathy as measured by the Scale of Ethnocultural Empathy (Wang et al., 2003). In study III, differences in basic empathy as well as in ethnocultural empathy were explored in a sample of 365 undergraduate students at the beginning and end of four Master programmes in health care education (Medicine, Psychology, Nursing and Social Work). The main results from the present thesis indicate that the central tendency, distribution of scores, intercorrelations, and factor structure in the Swedish version of SEE were well-matched and mainly similar to the American version. A significant strong correlation between basic and ethnocultural empathy was found, suggesting that the two constructs overlap substantially. The results of study III revealed that students from all programmes in health care had fairly high scores on both empathy scales. There were, however, significant differences between the study programmes. Overall, the studies show that ethnocultural empathy is a measurable construct but that it overlaps with basic empathy and further testing of the construct is needed. Implications of the findings for the measurement of empathy are discussed. / Avhandlingens övergripande syfte var att undersöka empati hos personer och grupper som har en annan etnisk bakgrund än den egna, en förmåga som kallas etnokulturell empati. Denna förmåga handlar om kunskap och acceptans av andra etniska individer och gruppers kulturella uttryck. Det amerikanska instrument som anses mäta etnokulturell empati översattes och validerades till svenska språk och förhållanden. Därefter testades instrumentet hos studenter på hälsovårdutbildningar i tre studier. I studie I undersöktes instrumentets validitet och reliabilitet i ett urval av 326 respondenter. I studie II undersöktes sambandet mellan grundempati, som anses mätas med instrumentet Interpersonal Reactivity Index (IRI), och etnokulturell empati som anses mätas med Scale of Ethnocultural Empathy (SEE). Studie III undersökte skillnader i grundempati och etnokulturell empati hos 365 studenter inom fyra program (Läkare, psykolog, sjuksköterska och socionom) i början och i slutet av deras studier. De huvudsakliga fynden i denna avhandling visade att faktorstrukturen och inter-korrelationerna i den svenska versionen av SEE i stor utsträckning liknade den amerikanska versionen. Dock detta inte bekräftades i konformatoriska faktoranalysen (CFA). Resultatet i studie II visade på ett starkt samband mellan grundempati och etnokulturell empati, vilket tyder på att dessa två konstruktioner av empati kraftigt överlappar varandra. I studie III visade resultatet att alla studenter från hälsovårdsutbildningarna hade höga nivåer av grund- och etnokulturell empati. Emellertid fanns signifikanta skillnader mellan programmen. Psykolog- och socionomstudenter hade högre nivåer av både grund empati och etnokulturell empati. Det övergripande resultat från avhandlingen visade att det går att mäta etnokulturell empati, men den nuvarande konstruktionen överlappar med grund empati. Ytterligare studier behövs för att förbättra instrumentet.

Climate change, with the possibility of an ice free Arctic ocean by 2015, has generated a renewed interest in the Arctic. This interest is being driven by the possibility of easier access to the abundant supply of resources such as oil, gas, minerals, and fisheries. Interest in Arctic tourism is also growing. Retreating sea ice will provide opportunities to avail of shorter routes for maritime traffic to and from Asia, North America, and Asia via the Arctic Ocean and Northwest Passage. In addition, the rate of population growth of local inhabitants in the Canadian Arctic is the fastest in Canada and one of the fastest in the world. A growing population will increase the demand for sealift resupply to Canada's northern communities. This work presents the first attempt to examine the role of privatization of icebreaking services in light of the present and projected shortages of infrastructure to support development in the Arctic. A unique combination of multiple methods within marine transportation, comprising of Delphi, grounded theory, and quantitative survey, is applied to investigate the potential for private involvement in the delivery of icebreaking services in the Canadian Arctic. This includes a novel application of Strauss and Corbin's Grounded Theory approach to develop hypotheses and relationships grounded in expert opinion. Although the Arctic Ocean may be ice free during the summers, there is still the issue of winter freezing and the threat of lingering multi-year ice which will impede marine transportation especially during periods of darkness and fog. The research shows that the future growth and development of the Canadian Arctic will undoubtedly require the use of designated icebreakers and ice strengthened vessels. However, Canada's fleet of Arctic icebreakers is ageing and considered unsuitable for future demands. While Canada has earmarked CAD $750M for the construction of one new icebreaker scheduled for delivery in 2017, the research shows that Icebreakers can be built outside of Canada for considerably less money and in less time. Also, the management and operation of the Canadian Coast Guard is under considerable security by the Auditor General of Canada. The research shows that not unlike others Arctic nations, there is potential for the creation of private-public partnerships in the delivery of Canadian Coast Guard services, principally icebreaking, in the Arctic.

There is a paucity of research juxtaposing parental education level and teacher emotional support in a single study which examines their relative impacts on students’ academic achievements. Therefore, the first objective of this dissertation is to study the influence of parental education level, in comparison to the influence of teacher emotional support, on students’ math performance, by using more representative data and a rigorous statistical method. The second objective is to identify and examine how some important psychological traits (both affective and cognitive) mediate the effects of social factors on students’ math performance. The third objective is to examine whether those relationships are moderated by gender. Hong Kong’s survey data is extracted from the Program of International Students Assessment (2003) as organized by Organization for Economic Co-operation and Development (OECD), on the math performances of 4,478 students at the age of fifteen. Measurement invariance was first tested, and then followed by Confirmatory Factor Analysis. Two structural models were tested by Structural Equation Modeling using Linear Structural Relations (LISREL) 8.5 which is computer software for SEM. Results indicated that first, parental education level affects children’s math scores by providing home education resources and enhancing children’s math self-efficacy, and second the Self Determination Theory is applicable in supporting the hypothesis that teachers affects their students’ math scores by providing a cooperative learning environment, which in turn, enhances students’ affective and cognitive factors. Three important mediators, namely cooperative learning environment, math self-efficacy, and home education resources are concluded as significant mediating factors upon the effects of parents and teachers on students’ math performance. The perceived support from parents and teachers are not significantly different across gender in Hong Kong. This is consistent with recent studies that differences favoring males in mathematics achievement are disappearing. Theoretical contributions and practical implications are discussed in the final part of the dissertation.

Recently, sexting has gained popularity in both popular press and academic publications. Despite the prevalence of this communicative behavior, there is limited research that focuses on a theoretical explanation as well as how it can potentially enhance relationships. The purpose of this dissertation was threefold: to utilize the multiple goals theoretical perspective to examine sender goals when sexting, to assess if multiple goals within sexting was associated with relational behaviors and outcomes, and to develop a reliable and valid scale for sexting goals. A two-phase study was implemented. In phase 1, participants provided actual sexting messages they had recently sent to another person, and also provided their goal when they sent that particular message. Participants also answered scales related to relationship, communication, and sexual satisfaction, affectionate communication, and relational maintenance behaviors. Analytic coding was utilized for the open-ended responses regarding message content and goals, and the researcher also used the responses to develop participant- and theoretically-driven scales. Nine themes were identified for the type of goal participants had when sending sext messages. For phase 2, the proposed scale for the multiple goals of sexting was added to the preexisting survey. The researcher coded 204 sexting messages provided by participants as instrumental, relational, or identity goals and conducted multiple regressions to assess how the type of goal influenced each of the five relational outcomes. Multiple regressions revealed no significant associations among multiple goals and outcomes. Finally, exploratory factor analysis and confirmatory factor analysis was used to assess the proposed scale for the multiple goals of sexting. The EFA revealed a four-factor solution and the CFA demonstrated factorial validity for the scale. Post hoc analysis revealed significant associations for the goals from the scale and the relational outcomes. The results of this dissertation demonstrate that multiple goals are utilized in the context of sexting, and that specific goals are important for relational outcomes.

Objetivos: validar una escala para evaluar la contaminación de alimentos en el hogar y, medir la validez y confiabilidad. Métodos: se encuestaron madres o cuidadoras con niños menores a 5 años, en San Juan de Lurigancho en Lima Perú. La escala fue previamente sometida a una calificación de jueces expertos. Se realizó el análisis de factores con componentes principales, la consistencia interna fue medida con Kuder–Richardson Formula 20 (KR-20) y la validez de la prueba con el coeficiente Kaiser-Meyer-Olkin (KMO) y el test de esfericidad de Barlet. Resultados: la muestra tuvo 194 cuidadoras. Se definieron tres componentes (prácticas de limpieza, prácticas de almacenaje y contaminación del niño) con un total de 10 ítems. El ítem Prácticas de limpieza tuvo un KR-20=0.722 prácticas de almacenaje y contaminación de alimentos 0.518 y 0.5 respectivamente. La validez de la prueba tuvo un KMO = 0.549 y un test de Barlet 591.678 , gl =136, (p<0.05). Conclusiones: esta escala puede contribuir a la planificación de intervenciones en el aspecto de contaminación en el hogar y por lo tanto reducir episodios de infecciones en los niños. / Objectives: To validate a scale to assess contamination of food at home and measure the validity and reliability. Methods: mothers or caregivers with children under 5 years were surveyed in San Juan de Lurigancho in Lima Peru. The scale was previously subject to a rating of expert judges. Factor analysis with principal components was performed; the internal consistency was measured with Kuder-Richardson Formula 20 (KR-20) and the validity of the test with the coefficient Kaiser-Meyer-Olkin (KMO) and the sphericity test Barlet. Results: The sample was 194 caregivers. Three components (Practices cleaning, storage practices and pollution of the child) with a total of 10 items were identified. The item Cleaning Practices had a KR-20 = 0.722 storage practices and food contamination 0.518 and 0.5 respectively. The validity of the test was KMO = 0.549 and 591,678. Barlet test, df = 136, (p <0.05). Conclusions: This scale can contribute to the planning of interventions in the aspect of pollution in the home and thus reduce episodes of infections in children.