abstract: Relational turbulence theory (RTT) has primarily explored the effects of relational uncertainty and partner interdependence on relational outcomes. While robust, the theory fails to account for uncertainties and perceived interdependence stemming from extra-dyadic factors (such as partners’ social networks). Thus, this dissertation had two primary goals. First, scales indexing measures of social network-based relational uncertainty (i.e., network uncertainty) and social network interdependence are tested for convergent and divergent validity. Second, measurements of network uncertainty and interdependence are tested alongside measures featured in RTT to explore predictive validity. Results confirmed both measurements and demonstrated numerous significant relationships for turbulence variables. Discussions of theoretical applications and future directions are offered. / Dissertation/Thesis / Doctoral Dissertation Communication Studies 2018

Submitted by Leonardo Freitas (leonardo.hfreitas@ufpe.br) on 2015-04-10T14:27:21Z No. of bitstreams: 2 Tese Marcos Gabriel F Mendes.pdf: 1549891 bytes, checksum: 54640abf22622a7da0d29005cfc63db6 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-04-10T14:27:22Z (GMT). No. of bitstreams: 2 Tese Marcos Gabriel F Mendes.pdf: 1549891 bytes, checksum: 54640abf22622a7da0d29005cfc63db6 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013 / PPGBV; FACEPE; CNPq; / Entender como a Diversidade Funcional (DF) de assembleias de organismos afeta a complexidade estrutural do habitat em paisagens fragmentadas é um passo fundamental para se avaliar o funcionamento adequado do ecossistema e qual valor de conservação desses ambientes modificados pelo homem. Utilizando a DF obtida através de um conjunto de oito atributos funcionais descritos para 1985 indivíduos da assembleia de árvores em 19 comunidades, comparamos dois modelos causais distintos entre a DF e quatro variáveis de complexidade estrutural (produção de serrapilheira, índice de área foliar, área basal e luz transmitida difusa) em dois tipos de habitats: (i) fragmentos florestais < 100 ha e (ii) áreas de floresta primária (controle). Os resultados mostram que a DF afeta estruturalmente o habitat, principalmente no que se refere à produção de serrapilheira e variação da área basal florestal, em grandes segmentos de floresta. Por outro lado, a relação entre DF e complexidade estrutural em fragmentos < 100 ha é inexistente, sugerindo que a estruturação do habitat dependa basicamente do estágio sucessional e pressões provenientes da matriz, as quais os fragmentos são submetidos. Este estudo reforça a importância da DF sobre a estruturação do habitat, mostrando que esta relação em pequenos fragmentos está sujeita à distorções resultantes dos efeitos da frequência relativa de determinadas estratégias de vida favorecidas pela modificação da paisagem e da maior sensibilidade desses habitats aos efeitos físicos provenientes da matriz.

Submitted by Leonardo Freitas (leonardo.hfreitas@ufpe.br) on 2015-04-10T17:22:05Z No. of bitstreams: 2 Tese Marcos Gabriel F Mendes 2013 (PPGBV_UFPE).pdf: 1549891 bytes, checksum: 54640abf22622a7da0d29005cfc63db6 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-04-10T17:22:05Z (GMT). No. of bitstreams: 2 Tese Marcos Gabriel F Mendes 2013 (PPGBV_UFPE).pdf: 1549891 bytes, checksum: 54640abf22622a7da0d29005cfc63db6 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2003 / PPGBV; CEPAN; FACEPE; CNPq / Entender como a Diversidade Funcional (DF) de assembleias de organismos afeta a complexidade estrutural do habitat em paisagens fragmentadas é um passo fundamental para se avaliar o funcionamento adequado do ecossistema e qual valor de conservação desses ambientes modificados pelo homem. Utilizando a DF obtida através de um conjunto de oito atributos funcionais descritos para 1985 indivíduos da assembleia de árvores em 19 comunidades, comparamos dois modelos causais distintos entre a DF e quatro variáveis de complexidade estrutural (produção de serrapilheira, índice de área foliar, área basal e luz transmitida difusa) em dois tipos de habitats: (i) fragmentos florestais < 100 ha e (ii) áreas de floresta primária (controle). Os resultados mostram que a DF afeta estruturalmente o habitat, principalmente no que se refere à produção de serrapilheira e variação da área basal florestal, em grandes segmentos de floresta. Por outro lado, a relação entre DF e complexidade estrutural em fragmentos < 100 ha é inexistente, sugerindo que a estruturação do habitat dependa basicamente do estágio sucessional e pressões provenientes da matriz, as quais os fragmentos são submetidos. Este estudo reforça a importância da DF sobre a estruturação do habitat, mostrando que esta relação em pequenos fragmentos está sujeita à distorções resultantes dos efeitos da frequência relativa de determinadas estratégias de vida favorecidas pela modificação da paisagem e da maior sensibilidade desses habitats aos efeitos físicos provenientes da matriz

Abstract The fundamental choice among governance mechanism is whether to externally organize transactions outside the boundary of the firm in the market, or whether to internally organize transactions within the firm's boundaries. In other words, major decision which is made on the firm's organizational strategy culminates in the make-or-buy decisions. In business and especially in the context of logistics, the worldwide usage and importance of outsourcing has grown dramatically over the last decades and researchers have reported on the outsourcing of logistics functions from several perspectives and a growing interest towards outsourcing is indicated by the volume of writings on the subject in scholarly journals, trade publications and popular magazines. The theoretical framework in outsourcing studies has commonly been the theory of the firm in microeconomics, transaction cost theory, agency theory, marketing or strategic management. However, according to recent studies it seems that several perspectives are needed when studying the development of relationships and the antecedents that underlie outsourcing decisions. Hence, in this study, concepts will be used from several theoretical backgrounds to get an eclectic view of outsourcing. The main research question is to study how the buyers' logistics outsourcing decisions contribute to the accomplishment of goals in business networks. Empirical part of thesis contains two data sets. First data were collected in November 2005 and the target group in this data was northern Finnish companies. Totally 161 acceptable responses were received, corresponding to a 27.4 percent response rate. The second data were collected from industrial companies in Finland during spring 2008. In the second data, 235 acceptable responses were returned, representing a response rate of 22.5 percent. As a result, a two dimensional model was created for describing outsourcing relationships in the logistics service markets. On the one hand, network economies can be gained through horizontal mode of outsourcing, where focus is in unit costs of services and the way to achieve lowest possible unit costs are short-term bidding games among service providers. On the other hand, network economies can be achieved through vertical mode of outsourcing with cooperation and strategic partnership where all participants concentrate on their core competences and thus create network economies through transactional value in long-term. In the middle are hybrid modes of outsourcing where focus is on both unit costs of services and transaction costs. These outsourcing modes are where the outsourcing strategies arise and in this way, the thesis contributes to theoretical development of outsourcing phenomenon and concepts behind logistics outsourcing decision making.

Recently there has been a renewed interest in formative measurement and its role in properly specified models. Formative measurement models are difficult to identify, and hence to estimate and test. Existing solutions to the identification problem are shown to not adequately represent the formative constructs of interest. We propose a new two-step approach to operationalize a formatively measured construct that allows a closely matched common factor equivalent to be included in any structural equation model. We provide an artificial example and an original empirical study of privacy to illustrate our approach. Detailed proofs are given in an appendix.

The World Health Organization and the leading hospice organizations have emphasized the inclusion of family caregivers of hospice patients with cancer into end-of-life care, as these two dyad members may spiritually and emotionally influence each other. Given that depression and spiritual needs, which are prominent in these pairs, may impair quality of life (QOL) of hospice dyads, examining mutuality within dyads is imperative to develop a more accurate model that includes family caregivers. Therefore, the purpose of the study was to elucidate the importance of mutual effects within hospice dyads by examining the contribution of depression and unmet spiritual needs on their personal and their counterparts’ QOL. Structural equation modeling was used to integrate the feature of actor and partner effects in the Actor-Partner Interdependence Model. After eliminating outliers, the final sample was comprised of 660 hospice dyads in which the majority of hospice patients were white (97%) and male (56.6%) with a mean age of 73 years. Most of the family caregivers were white (95.9%) and female (73.5%) with a mean age of 65 years. On average, hospice patients reported a depression score of 4.00 (SD = 1.53), and their family caregivers had a significantly lower mean depression score of 3.65 (SD = 1.48). With respect to their spiritual needs, 25.5% of hospice patients indicated going to religious services was an unmet need, and about 13% of family caregivers also reported that going to religious services was an unmet spiritual need, followed by being with friends, laughing, thinking happy thoughts, and being around children. The results of structural equation modeling revealed that depression and spiritual needs in cancer patients and family caregivers exhibited significant actor effects on the individual’s QOL after controlling for the partner effects. Among the spousal pairs, depression in family caregivers exhibited a positive partner effect on hospice patients’ functional well-being (β = .15, p < .05), implying that as depressive symptoms increase, hospice patients’ functional well-being increases. This study supported the need for considering both as one unit and the mutuality inherent in dyads. The findings of the study suggest the importance of consistent assessment in emotional and spiritual well-being for hospice patients as well as family caregivers, as their concerns may be transmitted to each other due to mutuality existing within the dyads.

Among-individual variation in resource use is pervasive and may have ecosystem-wide effects. This variation between individuals can affect population niche breadth. My study determined if niche breadth was best explained by dispersal of individuals from locations with different prey resources driven by ecosystem level disturbance regimes or competition among individuals inhabiting a site, resulting in dietary partitioning. I used structural equation modeling to examine the direct and indirect effects of several environmental variables spanning gradients of disturbance, competition strength, and food availability on niche breadth of the Eastern Mosquitofish (Gambusia holbrooki). I evaluated two complementary models 1) allowing for only direct effects of disturbance on niche breadth and 2) limiting effects of disturbance on niche breadth to indirect effects via food availability and competitor densities. The partitioning hypothesis excluding direct effects of disturbance on niche breadth was best supported by my data.

No description available.

Thesis advisor: Ina V.S. Mullis / More than ever before, countries are relying on their experts in STEM (Science, Technology, Engineering, and Mathematics) fields to find solutions to serious global problems, such as climate change, hunger, and disease. Unfortunately, the growing demand for these experts is outpacing supply. At each stage in the educational pipeline from the primary grades through university, there is substantial attrition in the number of students studying STEM subjects.From the early grades, students’ home environment has a powerful influence on their science achievement. However, there has been little research into the factors that have the most influence on inspiring young students to continue studying science. This dissertation extended investigations by Swedish researchers who used TIMSS and PIRLS 2011 data and structural equation modeling to show that that fourth grade students with higher achievement in science had well-educated parents who had many books at home, and spent time engaging their child in early learning activities, such that the child began school with basic skills already developed. After replicating the Swedish TIMSS and PIRLS 2011 Common Model with TIMSS 2015 data and finding good agreement, additional variables were systematically examined with a focus on the role of attitudes. Extending the explanation of the influence of parents’ education to include their educational expectations for their child and updating the model to include home digital resources elaborated on this Base Model. However, the hypothesis that parents’ attitudes toward mathematics and science would have a role in explaining science achievement was not supported. Analyzed either as a second independent variable with parents’ education or as a mediating variable, the effect was negligible. Finally, parents’ education levels had little or no relationship with the degree to which students like learning science, but a notable relationship with students’ confidence in their ability to do science. Clearly, more research into how parents’ attitudes and other home factors can influence students’ to study science throughout their academic careers is warranted. / Thesis (PhD) — Boston College, 2021. / Submitted to: Boston College. Lynch School of Education. / Discipline: Educational Research, Measurement and Evaluation.

A research report submitted to the Faculty of Commerce, Law and Management, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Commerce (specialising in Marketing) / The twentieth-century dietary evolution has resulted in livestock being used as the primary source of protein in many countries. This has various implications on the wellbeing of humans, animals, and planet earth itself. The choices consumers make regarding food not only affect our personal health, but it also directly affects the wellbeing of our current ecosystems where modern meat production systems place a worrying burden on the environment. Sustainable consumption practice is often a result of two main driving forces, the first being individual or health (egoistic) motives and the second being animal welfare and environmental concern (altruistic) motives. The growing demand for meat products worldwide is unsustainable and there is a clear gap between our responsible intentions as citizens of the world and our hedonic needs as consumers referred to as the ‘Citizen-Consumer’ gap. Experts argue that technological innovations and more efficient production methods would serve as a future solution for the environmental and social implications of the livestock industry however current scholars emphasise that a technological fix will not be sufficient and that it is imperative for society to undertake a behavioural fix, such as lowering meat intake and discovering more sustainable means of protein consumption Consequently, the purpose of this study is to assess health consciousness, environmental concern and animal welfare as key predictors of consumers’ locus of control and attitudes towards meat consumption among university students, in Johannesburg, South Africa. The study used a design that was quantitative in nature, which resulted in the researcher employing a deductive approach, using a positivistic method. Data was collected by means of a survey questionnaire and was used to test the hypotheses. By means of Partial Least Squares – Structural Equation Modeling (PLS-SEM), the significance of the hypotheses statements was determined from a sample of 172 students enrolled at the University of the Witwatersrand, Johannesburg, South Africa. The findings generated by SmartPLS 3 statistical software revealed that health consciousness was the key predictor of external locus of control and that external locus of control had the most significant relationship with consumers’ attitude toward meat consumption, as compared to the second mediator variable – internal locus of control. It is anticipated that the findings of this study will contribute to both theory and practice in modern society, and it is trusted that the findings of this study will greatly inform future research endeavours. / NG (2020)