Epidemiological models are used to inform health policy on issues such as target vaccination levels, comparing quarantine options and estimating the eventual size of an epidemic. Models that incorporate some elements of the social network structure are used for diseases where close contact is required for transmission. The motivation of this research is to extend epidemic models to include the relationship with a broader set of relevant real world network properties. The impact of degree distribution by itself is reasonably well understood, but studies with assortativity or clustering are limited and none examine their interaction. To evaluate the impact of these properties, I simulate epidemics on networks with a range of property values. However, a suitable algorithm to generate the networks is not available in the literature. There are thus two research aspects: generating networks with relevant properties, and estimating the impact of social network structure on epidemic behaviour. Firstly, I introduce a flexible network generation algorithm that can independently control degree distribution, clustering coefficient and degree assortativity. Results show that the algorithm is able to generate networks with properties that are close to those targeted. Secondly, I fit models that account for the relationship between network properties and epidemic behaviour. Using results from a large number of epidemic simulations over networks with a range of properties, regression models are fitted to estimate the separate and joint effect of the identified social network properties on the probability of an epidemic occurring and the basic reproduction ratio. The latter is a key epidemic parameter that represents the number of people infected by a typical initial infected person in a population. Results show that social network properties have a significant influence on epidemic behaviour within the property space investigated. Ignoring the differences between social networks can lead to substantial errors when estimating the basic reproduction ratio from an epidemic and then applying the estimate to a different social network. In turn, these errors could lead to failure in public health programs that rely on such estimates.

I report on the findings of an inductive, interpretive multiple-case study of organizational cross-cultural adaptation and answer the question of how foreign companies can overcome the challenges of fitting into their host environment. Based on in-depth interview data from nine Chinese firms operating in the United States, I explore the content and drivers of firm-level cross-cultural adaptation. The emergent framework demonstrates a dynamic and comprehensive process at the firm level, involving a multilevel and multidimensional adaptation to fit through social networking. The identified patterns of adaptors reveal the link between cross-cultural adaptation and functional fitness of firms in a foreign environment. The study also identifies the boundary conditions of the cross-cultural adaptation of foreign firms. In addition, the study highlights the previously underserved aspect of functional fitness in a foreign environment and its essential role in influencing a firm’s overseas performance.

This thesis examines development as a catalyst for the decision to migrate. Specifically, the two complementary theories of relative deprivation and social networks are examined to explore possible associations between level of household development and migrants' designation of savings or remittances towards development-related purposes and whether remittances are positively affected by migrants' participation in a hometown association (HTA). The study relied on data from the Mexican Migration Project (MMP), using the historical Mexican sending state of Jalisco. The MMP, using an ethnosurvey method, gathers data on individual migrant experiences, including border-crossing methods, jobs held, and participation in migrant hometown associations, amenities found in individual households, and available services in communities. No support was found for the first hypothesis, which predicted that relative deprivation was a catalyst of migration. Support was found for the second hypothesis, that migrant participation in HTAs, specifically in social clubs, positively influenced designation of savings or remittances for development-related purposes. This same support was not the case for migrant involvement in sport clubs. This thesis contributes to social network theory, pinpointing the positive effect that migrant participation in hometown associations has on designating money towards development. / Master of Arts

This study examines the role of board social and human capital in assessing the market value of firms in the UK context. As the world economy has shifted from manufacturing to service and knowledge-based economies, attributes such as knowledge, expertise, skills, ability and reputation are increasingly fundamental to the success of business enterprises. There is a growing consensus that these attributes are an increasingly valuable form of capital, asset or resource, despite their intangibility. In accounting, there are a number of problems arising from the accountability of non-physical, non-financial capital. Firstly, some forms of capital and certain assets are neither recognised nor presented in the statement of financial position. Secondly, some accounting practices relating to intangible assets are very conservative, resulting in undervalued assets and overstated liabilities. Consequently, there is an increasing gap between the book value and market value of firms. This gap restricts the relevance of information presented in financial statements and suggests that there is something missing in financial statements. This is the research problem being addressed in this study. While prior literature demonstrates that it has proven difficult to operationalise intangible forms of capital, there has been significant empirical attention and theoretical development in social and human forms. This thesis aims to contribute to accounting theory and practice by exploring the impact that board social and human capital have on firm market value. In light of extant research, it is hypothesised that social and human capital possessed at board level are positively related to the market value of firms. This study employs the Ohlson’s (1995) residual income valuation model to test the impact of social and human capital using a sample of UK firms listed on the FTSE All Share index for a period of 10 years (2001-2010). Social and human capital measures are derived from interlocking directorate ties and detailed biographic information of board directors. This study benefits from Pajek and Ucinet network packages to generate network maps and calculate positional metrics such as centrality and structural hole measures.

Prospective education leaders face challenges in a demanding environment often lacking critical resources necessary to make a difference in schools. The potential to acquire these resources may be found in the mentoring relationships formed during internships in educational leadership preparation programs. A lack of understanding exists regarding variations in the nature of these mentoring relationships—specifically in terms of relational embeddedness—the type and degree to which partners form ties embedded within a social relationship. Variations in relational embeddedness may impact mentoring quality and the potential to acquire the resources needed to succeed in demanding school environments. Theoretical frameworks in mentoring and social network theory were used in this quantitative study to examine the nature of relational embeddedness and its association with a variety of internal and external factors, which may influence the potential relational embeddedness developed in these relationships. Internal factors such as sex and behavior characteristics of both the perspective education leaders and their mentor principals, as well as previous relationship history were among the variables associated with relational embeddedness. This study lays theoretical groundwork and suggests directions for future research regarding relational embeddedness as a means to influence the mentoring quality needed to acquire resources for effective school leadership outcomes. This study also provides practical implications for administrators in educational leadership preparation programs regarding the multidimensional nature of relational embeddedness and the internal and external factors associated with its development.

Fueled by ubiquitous access to mobile phones, and a massive population of nearly 3 billion unbanked people around the globe, mobile commerce is evolving as a disruptive technology. Simultaneously, mobile payments are surfacing as a killer application within the mobile commerce context (Hu et al. 2008). Undeniably, the proliferation of wireless mobile technology provides much-needed access to vital information, and financial services for disenfranchised, unbanked populations. In addition, technological innovations offer first-time opportunities for suppliers of goods and services in a market context to gain competitive advantages while enhancing their economic viability. According to Portio Research, the volume of mobile payments rose significantly from $68.7 billion U.S. dollars in 2009, with predictions of $633.4 billion U.S. dollars by the end of 2014 (mobithinking.com 2012). Despite exponential growth in the number of mobile subscribers globally, and widespread adoption of mobile commerce, acceptance rates for mobile payment applications have lagged (Dahlberg et al. 2007, Ondrus et al 2009, Ondrus and Lyytinen 2011). Yet examinations of factors inhibiting the widespread acceptance of mobile payments are relatively sparse. Using Social Network theory, this research examines factors affecting engagement in mobile payments. The researcher posits that four primary elements influence mobile payment engagement: 1) the relationships between and amongst inter-organizational alliance members; 2) the prevailing regulatory environment; 3) the state of existing banking and technology infrastructures, and 4) an assessment of economic opportunity. The research outcomes from this exploratory examination led to the development of a comprehensive model for mobile payment engagement, and strongly suggest that ties between and amongst firms in inter-organizational alliances help ensure the success of mobile payment engagement. Support was found for the following suppositions: 1) similarities and relations (continuous ties) help establish a framework and understanding amongst alliance members as to each party’s goals and objectives; and 2) interactions and flows (discrete ties) between and amongst inter-organizational alliance members strengthen the overall ties between alliance members while solidifying a viable working relationship amongst the alliance members. This study employs a qualitative approach to obtain real world insight into the dynamism of the mobile payment arena. A model is then proposed to practically examine mobile payment engagement opportunities. From a theoretical perspective, the research contributes to the extant scholarly knowledgebase pertaining to engagement in mobile payments.

Collaborative groups are important both in the learning environment of engineering education and, in the real world, the business of engineering design. Selecting appropriate individuals to form an effective group and monitoring a group’s progress are important aspects of successful task performance. This exploratory study looked at using the concepts of cognitive social structures, structural balance, and centrality from social network analysis as well as the measures of emotional intelligence. The concepts were used to analyze potential team members to examine if an individual's ability to perceive emotion in others and the self and to use, understand, and manage those emotions are a factor in a group’s performance. The students from a capstone design course in computer engineering were used as volunteer subjects. They were formed into groups and assigned a design exercise to determine whether and which of the above mentioned tools would be effective in both selecting teams and predicting the quality of the resultant design. The results were inconclusive with the exception of an individual's ability to accurately perceive emotions. The instruments that were successful were the Self-Monitoring scale and the accuracy scores derived from cognitive social structures and Level IV of network levels of analysis.

Fueled by ubiquitous access to mobile phones, and a massive population of nearly 3 billion unbanked people around the globe, mobile commerce is evolving as a disruptive technology. Simultaneously, mobile payments are surfacing as a killer application within the mobile commerce context (Hu et al. 2008). Undeniably, the proliferation of wireless mobile technology provides much-needed access to vital information, and financial services for disenfranchised, unbanked populations. In addition, technological innovations offer first-time opportunities for suppliers of goods and services in a market context to gain competitive advantages while enhancing their economic viability. According to Portio Research, the volume of mobile payments rose significantly from $68.7 billion U.S. dollars in 2009, with predictions of $633.4 billion U.S. dollars by the end of 2014 (mobithinking.com 2012). Despite exponential growth in the number of mobile subscribers globally, and widespread adoption of mobile commerce, acceptance rates for mobile payment applications have lagged (Dahlberg et al. 2007, Ondrus et al 2009, Ondrus and Lyytinen 2011). Yet examinations of factors inhibiting the widespread acceptance of mobile payments are relatively sparse. Using Social Network theory, this research examines factors affecting engagement in mobile payments. The researcher posits that four primary elements influence mobile payment engagement: 1) the relationships between and amongst inter-organizational alliance members; 2) the prevailing regulatory environment; 3) the state of existing banking and technology infrastructures, and 4) an assessment of economic opportunity. The research outcomes from this exploratory examination led to the development of a comprehensive model for mobile payment engagement, and strongly suggest that ties between and amongst firms in inter-organizational alliances help ensure the success of mobile payment engagement. Support was found for the following suppositions: 1) similarities and relations (continuous ties) help establish a framework and understanding amongst alliance members as to each party’s goals and objectives; and 2) interactions and flows (discrete ties) between and amongst inter-organizational alliance members strengthen the overall ties between alliance members while solidifying a viable working relationship amongst the alliance members. This study employs a qualitative approach to obtain real world insight into the dynamism of the mobile payment arena. A model is then proposed to practically examine mobile payment engagement opportunities. From a theoretical perspective, the research contributes to the extant scholarly knowledgebase pertaining to engagement in mobile payments.

Research in the relationship between second language (L2) production and study abroad has largely focused on establishing a connection between exchange studies and the success rate of second language acquisition. This Bachelor's thesis investigates L2 production by studying L2 English speakers' attitudes regarding the target language culture in relation to their production of a regionally typical phoneme by formulating the research question “How does cultural identification with the target language environment influence L2 phonetic production in the L1 language community?” in hopes of contributing to sociophonetic studies. This is done by conducting a qualitative study based on the phonetic production of rhoticity and the experiences of nine Swedish former exchange students to the United States. The study draws on existing research that highlights the saliency of rhoticity, as well as provides insight into the importance of identity in language use and into the relevance of motivation and the establishing of social networks for L2 gains during study abroad. To provide a framework for understanding these issues, the Social Network Strength Scale is applied. The results and data analysis suggest that, opposite to expectation, there is no clear relationship between cultural identification and L2 phonetic production for speakers who are no longer immersed into the L2 environment. However, the results establish a possible connection between maintaining a dense social network with native speaker members of the L2 community, as well as of having an awareness and capacity to understand the L2 culture, and a higher percentage of phonetic production of sounds typical for the L2 environment.

The purpose of this intervention study was to explore how the community volunteers from the Supporting Home Environments in Beating Adversity (SHEBA) research project – in two high-risk school communities in the Nelson Mandela Bay Metropolitan area – valued their social networks. The broader SHEBA participatory and action research project focused on how community volunteers, using their own resources, collaborated with schools in their communities to develop support plans for their communities. I selected interpretivism as the meta-theory for the study and utilised Participatory Reflection and Action (PRA) as the methodological paradigm and research design. The empirical part of this study was conducted in 2012. The data for the study were collected from 35 purposively selected volunteers who, at the time of the study, were involved in volunteer work at schools in their communities. All 35 volunteers participated in one workshop and one brainstorming session. Data were generated through a participatory workshop and follow-up brainstorming session and captured by means of posters and field notes. Inductive thematic analysis was used as the means of interpretation and I related the results to Lin’s Network Theory of Social Capital in interpreting the results. The results of the study suggest that the social networks of the volunteers were valued highly by them in dealing with the various challenges in their communities. The findings suggest also that the community volunteers invested themselves continuously in preserving their social support networks by reaching out to one another in times of crisis and by responding to each other’s needs by supporting one another. The findings suggest further that the volunteers maintained their social support networks by reinforcing the values that held them together and directed them in their efforts to support one another and their communities. The volunteers in the study attributed significant value to each other as sources of support and knowledge. They were able to meet their challenges together by learning from and identifying each other as resources. Modern communication media such as mobile phones were very important to the volunteers in maintaining their support networks with their colleagues and communicating with their communities. I therefore concluded that interventions in high-risk communities should be aimed at assisting community volunteers to gain access to and use such technologies effectively and appropriately in their networking. The value the community volunteers in the SHEBA project attributed to their social networks was clear from the benefits they derived from these networks. The findings of the study suggest that the social networks of the volunteers enhanced their sense of personal wellbeing as well as their sense of social belongingness. I concluded that social support networks could contribute significantly towards people’s overall wellbeing and that community interventions should adopt a holistic approach in high-risk communities thereby enhancing people’s hedonic, eudemonic, and social wellbeing. / Dissertation (MEd)--University of Pretoria, 2017. / Educational Psychology / MEd / Unrestricted