The advances in social media and social computing technologies have dramatically changed the way through which people interact, organize, and collaborate. The use of social media also makes the large-scale data revealing human behavior accessible to researchers and practitioners. The analysis and modeling of social networks formed from relatively stable online communities have been extensively studied. The research on the structural and dynamical patterns of large-scale crowds motivated by accomplishing common goals, named the cyber movement organizations (CMO) or cyber-enabled social movement organizations (CeSMO), however, is still limited to anecdotal case studies. This research is one of the first steps towards the understanding of the CMO/CeSMO based on real data collected from online social media.The focus of my research is on the study of an important type of CMO/CeSMO, the crowd-powered search behavior (also known as human flesh search, HFS), in which a large number of Web users voluntarily gathered together to find out the truth of an event or the information of a person that could not be identified by one single person or simple online searches. In this research, I have collected a comprehensive data-set of HFS. I first introduce the phenomenon of HFS and reviewed the study of online social groups/communities. Then, I present the empirical studies of both individual HFS episodes and aggregated HFS communities, and unveiled their unique topological properties. Based on the empirical findings, I propose two models to simulate evolution and topology of individual HFS networks. I conclude the dissertation with discussions of future research of CMO/CeSMO.

在媒介暴漲的現代社會中，資訊的掌握成為新興權力的象徵。台灣社會的八卦文化，由口語之消息傳播，轉變為媒體大幅腥羶色之報導。其深入公領域生活，挑起個人隱私與公眾求知慾之間的拉鋸戰，學界對於八卦文化之盛行，莫不表現高度之重視，然其觀察取向多由媒體、新聞之角度作一道德價值的反省，鮮少針對八卦之實際行為與互動加以研究。本研究以社會網絡分析方法，針對小團體之成員予以測量觀察，瞭解個人於日常之人際網絡中，加何獲得八卦消息，以期對於八卦之現象做一探索。 本研究以友誼網絡為參照之對象，分析團體內成員由八卦關係組成的網絡，其結構特性、權力角色、成員八卦關係的聚合狀態、八卦互動之模式、八卦者所持有的態度。研究發現，八卦深植於日常生活，由友誼關係發展而來；於日常生活之中掌握八卦資訊的個人，在八卦訊息的溝通中，亦扮演重要的角色，該結果證實學者對於八卦與權力高度相關之看法。其次，團體內個人的八卦關係，遠比友誼關係來得親近，其互動模式呈現放射狀，成員基於交換訊息所組成的八卦次團體，具有單一的核心，這些特性顯示出八卦傳遞的時效價值，以及團體內八卦活絡之現象。最後，本論文檢證學者所提出之八卦理論，並提出八卦之社會功能，予以修正與重新詮釋。 關鍵字：八卦、社會網絡分析、社會功能 / In the modern society, the acquisition of information has become the new way to gain dominant position. In Taiwan, the gossip culture has been transformed from interpersonal communication topic to popular news on mass media. Gossip not only challenges the boundary between public and private realm but also provokes the debate between personal privacy and the right of information access. In the discipline of mass communication, the issue of gossip is examined from the ethical perspective. However, this study takes a sociological approach that adopts the social network analysis. A pre-selected concrete small group is used as a research sample to explore how gossip circulates in our daily interactions. This thesis presents the results from the comparisons between the gossip network to the friendship network. They are demonstrated in the order of network structure, roles, proximity, interaction patterns, and the attitudes of the gossipy people. This study suggests that gossip is deeply rooted in the friendship relations. It further shows that the prominent actors in our daily life occupy an important position in the transmission of gossip, which corresponds to the hypothesis of social control theory. Additionally, the social distance within the gossip network is much more closer than that within the friendship network. Moreover, the gossip network is composed of a single-core structure with a star-shaped interaction pattern. This unique structure is formed by the frequent exchange of information and instant diffusion of gossip. Finally, various theories of the social functions of gossip are reexamined, and new understandings of these theories are provided in the end of this thesis. Keywords: gossip, social network analysis, social functions.

The research is a study of the context of the life and work of John Hooper, Bishop of Gloucester and Worcester, 1551-1555. It charts the nature of his relationships with friends, patrons, mentors, colleagues, and lay and clerical supporters and opponents in England and on the Continent, through the study of ecclesiastical, political, business and economic, intellectual, official and judicial, kinship and social networks in which he was involved. Its purpose is to reveal the complex mix of societal and confessional pressures influencing Hooper's approach and constraining his freedom of manoeuvre, and to a large extent determining how successful he was at achieving change. The study reveals key determinants of the nature and direction of the Reformation in England. It shows that the pressure to change doctrinal allegiances and to accommodate reformed church practices challenged not only personal confessional loyalties but also the very framework of society; that is, familial and social ties, economic, business and judicial groupings, educational affiliations, and ruling oligarchies. Within these societal networks there existed the momentum for, and resistance to, religious change. Confessional allegiances were just part of a complex mix of political and social pressures that included the exercise of patronage and protection, the use of conflict and compromise, the practise of different obligations, allegiances and loyalties, the employment of status and kinship, and the accommodation of various alliances and means of association. All of these influenced Hooper's approach and scope for action. As such, the research provides insight into why and how, in the development of the newly-reformed church in England, thoroughgoing religious change was resisted and contained.

This thesis examines the space use, movement and contact rate patterns of a high- density, group-living, Eurasian badger (Meles meles) population in the UK naturally infected with bovine tuberculosis (bTB). Recently developed proximity logging devices were deployed on a representative sample of 51 badgers from eight different social groups to track their movements using radio-telemetry and to quantify their within- and between-group contact rates. Whilst interactions within social groups accounted for more than 90% of contacts, the entire study population was ultimately connected through interactions among individuals from neighbouring groups. Both within and between-group contacts, and also the use of denning sites, were heavily influenced by seasonal and demographic factors, which appear to be motivated to a large extent by reproductive behaviours. Nevertheless, by using social network analysis I found that badgers that tested positive for bTB were found to interact with fewer of their group members and for a shorter amount of time. Specifically these test-positive individuals were found to associate with test-negative group members significantly less than would be expected by chance. Those animals testing positive for bTB were also found to use outlying setts significantly more frequently than those that tested negative. The within and between-group contact rates of individuals were found to correlate with their sett use patterns. Those animals that spent less time interacting with group members and those that spent more time interacting with members of foreign social groups, were found to spend a greater proportion of their time at outlier setts. The findings in this thesis suggest a link between wider roaming behaviour and the disease status of an individual. This adds support to the argument that the social disruption of badger populations, for example through culling, may promote rather than alleviate the spread of bTB as a result of increased movement and contacts between groups. State-of-the-art technology has enabled me to demonstrate the strong influence that badger social organisation may have on the transmission of an economically significant infectious disease. My findings suggest that disease control measures might be enhanced by taking into account seasonal and individual-level variation in ranging behaviour and use of outlier setts, for example, by identifying and targeting functional groups of individuals, specific areas, or times of the year that contribute disproportionately to disease spread.

Research of social networks has revealed that certain components of network position can have an impact on organizational effectiveness, yet relatively little research has been conducted on network position and individual performance. This study sought to determine if a relationship exists between an employee's social network position and an individual's job performance. The participant organization was a network of individuals within an Information Technology (IT) department at a major defense company. A social network analysis (SNA) was conducted to determine the employee's network position, measured by centrality and constraint. Centrality refers to the extent to which an individual is connected to others. Constraint refers to how constrained or inhibited an individual is within the network. Performance was measured by annual appraisal ratings provided by the employee's supervisor. Hierarchical regression analysis was performed to determine relationships between the dependent variable (performance) and independent variables of centrality and constraint. Secondary variables also studied in relation to the model included education level, service years (tenure), job grade, and age. The overall model revealed 17% of variance explained. The primary predictors of network position, centrality and constraint, were not statistically significant predictors of performance ratings. Three variables, job grade, tenure and age, were found to be statistically significant predictors of employee performance. Further research is suggested to provide additional insight into the predictive value of these variables.

Vermont is widely-regarded as a hub for artisan cheese production, with more cheesemakers per capita than any other US state. Despite significant local and statewide support, out-of-state markets are essential to the long-term success of these small-scale producers. In spatially extended supply chains, retailers occupy a pivotal position. This thesis aims to examine the intermediary role of retailers in building social networks between producers and consumers. Consumers appreciate Vermont artisan cheese, in part, because it is embedded in a complex network of social values and relations related to where and how it is produced. Guided by social theories of consumption, sensory experience, and exchange, a transdisciplinary, mixed-methods study was conducted in order to better understand cheese retailers' role in this network. First, participant observation and ethnographic interviews at a specialty cheese shop demonstrated how highly specialized cheese retail professionals (known as a cheesemongers) communicate social information about Vermont artisan cheese to consumers in practice. Specialized narratives are transmitted to consumers through in-store signage and social interactions. These stories also involve the cheesemonger as traveler, developing specialized knowledge of Vermont artisan cheese by traveling to the place of production. A second site of participant observation at a national conference for artisan cheese professionals added breadth to the study. While cheesemongers appear to agree that a certain level of intrinsic quality is necessary for consumer acceptance and preference, many also see the importance of, and derive pleasure from, knowing and conveying the social story, and perceive this to be an important part of their professional role and identity. Second, social network analysis provided a broader examination of relationships between Vermont artisan cheesemakers and retailers in the region. In order to collect data on these relationships, an online survey was distributed to Vermont artisan cheesemakers and follow-up phone calls were conducted. A combination of statistical and network analyses was used to visualize the social structure of the network, identify key actors, and examine qualities of the relationships. The findings suggest that the social network for Vermont artisan cheese is a multiplex system, in which a cheesemaker's relative position in the network is the result of a complex balance--and sometimes compromise--between a cheesemaker's needs, goals, and desires and their various retailers' needs, goals, and desires. Moreover, geographic proximity, time, experience, convenience, cost, history, loyalty, and regard all appear to be important factors in the type of relationship cheesemakers have with retailers, and whether a relationship is established at all.

User participation and its relationship to system success have been discussed in the information systems (IS) literature from many theoretical and practical perspectives. In reality, most of this discussion is grounded in empirical research that has yielded mixed results on the importance of user participation and its relationship to system success. The goal of this dissertation is to extend the line of inquiry into user participation during information system development by providing information systems researchers and IS practitioners with both a valid theoretical and practical investigation of a successful IS solution. This investigation organizes the study within a descriptive model that emerges from the different traditions of prior research and uncovers the approach to user participation in a successful IS solution. This user participation approach (UPA) model becomes the structure for the systematic arrangement of user participation approaches into a four-fold typology according to criteria or extrinsic information attributed to them in the research literature. A case study analysis and social network analysis of a successful IS solution will be used to describe, map and measure the relationships, activities, processes, and flows between participants, thus providing a descriptive and visual analysis of the relational structure that emerges. Indeed, these methodological approaches conceptualize the attributes and the relations of user participation during information system development and give insightful perspectives on how a successful IS solution is developed and implemented. The resulting outcome is a description of a successful approach to user participation and some practical recommendations on how to increase the chance of success in a system solution.

Role clarity for any individual leads to more successful implementation of his or her job expectations. In a school, there are many individuals with various roles to fill. The Instructional Technology Resource Teacher (ITRT) has multiple roles within a school including: training teachers, designing integrated curriculum, managing learning resources, modeling instructional strategies, acting as a technology resource, assisting content specialists, and preview and recommending software. This study found that stakeholders in schools consistently recognize the ITRT as both a trainer and designer of integrated lessons. Other instructional support roles are recognized only by some stakeholders in schools. When a greater emphasis is placed on 21st Century skills throughout the school, there is greater consistency in the perceptions of the roles of the ITRT by stakeholders.

This thesis examines the relationship between individual differences in learning, personality, and social success in two groups of brown capuchin monkeys (Sapajus sp.) housed at the “Living Links Centre for Human Evolution” at Edinburgh Zoo, UK. Being able to learn quickly and efficiently likely helps primates achieve social success (defined here in terms of centrality within a social network), such as acquiring knowledge of others or learning social skills. Therefore, individuals that are better at learning were predicted to have greater social success than other group members. This prediction, however, contrasts with hypotheses generated from two other disciplines at the individual level: 1) the study of behavioural innovation, and 2) the study of individual differences, i.e. “personality”. In terms of behavioural innovation, better learners should have less social success than other group members because they are expected to rely more on problem-solving, rather than physical combativeness or status, to gain access to socioecological resources. In terms of personality, learning should have little or no direct relationship with social success because other individual differences, like sociability and fearfulness, should mediate primates’ social decision making. This thesis investigates each of these hypotheses. Personality was assessed in 127 capuchins from 7 international sites using the Hominoid Personality Questionnaire, and then validated at Living Links (LL) using behavioural codings; this was the first-ever description of personality structure in brown capuchins. Brown capuchins have five personality dimensions: Assertiveness, Openness, Sociability, Neuroticism, and Attentiveness. Ratings were consistent across observers, and predicted relevant behaviours among the LL capuchins over a year later (e.g. scores on Sociability predicted time spent in close proximity to others). “Social success” in the LL capuchins was assessed in terms of centrality in spatial proximity networks. Individual scores on social network centrality were significantly correlated with scores derived from a Principal Components Analysis of eight affiliative and agonistic behaviours among the LL capuchins, indicating that spatial proximity is a reliable measure of the quality of subjects’ social embeddedness within their groups. Social rank and two personality traits (Assertiveness and Sociability) were positively related to network centrality, while another personality trait (Neuroticism) was negatively related to centrality. Sociability was a significant predictor of network centrality even after controlling for social rank and the other personality traits, highlighting the importance of this personality trait in shaping the social success of capuchins beyond that of basic social rules (e.g. kinship, sex, and rank). Individual learning was assessed in the LL capuchins by administering two operant tasks to subjects under conditions of free choice participation. In Task 1, thirteen monkeys participated, and eight individuals met learning criteria (i.e. >80% trials correct over 3 consecutive sessions). In Task 2, fifteen monkeys participated, and five individuals met learning criteria; the monkeys that learned this second task were also among those individuals that learned Task 1. For monkeys that regularly participated in both tasks (i.e. >50% of sessions), their average performances (i.e. % trials correct) were significantly correlated with individual scores on Assertiveness, but not the other four personality traits, or individual differences in attention span during testing, the percent of sessions subjects participated during testing, the amount of scrounging events subjects directed towards others within their social group, or the percent of observation time subjects spent feeding within their main indoor/outdoor enclosures. In terms of social success, relatively better learners had lower social rank and network centrality compared to relatively poor learners. Also, compared to poorer learners, better learners were generally less likely to direct affiliative acts (e.g. grooming, food sharing, coalitionary support) to other group members. Controlling for Assertiveness (i.e. the only variable related to individual differences in subjects’ average learning performance), individual differences in learning performance were no longer significantly related to social rank, network centrality, or the amount of affiliative acts subjects initiated with others. Collectively, such findings contrast the hypothesis that better learners should (concurrently) be more socially successful than poorer learners, and instead are more reflective of hypotheses pertaining to behavioural innovation and/or the study of individual differences. Social rank and certain traits of personality (Assertiveness, Openness, Neuroticism, and Sociability) appear to interact with capuchins’ patterns of social interaction, and one personality trait (Assertiveness) may mediate how individual differences in learning are associated with differences in social success.

In this thesis, I attempt to apply the network perspective to the study of corruption. First, I deal with current state of theory and research on corruption, which I find to be ignoring relations and interactions among offenders themselves. Then I review literature in the field of covert and criminal networks. The theoretical part of this thesis ends with brief descriptions of two major cases of political corruption in the Czech Republic - so called Nagy case and Rath case. In the methodological part, I introduce basic concepts of social network analysis as well as methods for positional analysis, especially the blockmodelling. In my research, I deal with exploratory analysis of both the aforementioned networks. Using proxy data, I analyse cohesion, centralization, centrality measures and cliques in these networks. Then I use conventional blockmodeling to search for roles and positions within these networks. My results suggest that both networks are dense and centralized with overlapping cliques contrary to other covert networks possibly accounting for their eventual disruption and failure. Positional analysis using varius methods such as CONCOR or different types of cluster analysis reveals a structure resembling the core-periphery model, which is supported by measuring coreness and finding a good...