Abstract 1,000,000,000,000 people use Instagram and many use it on a daily basis, yet surprisingly few studies have been conducted to better understand how this social media platform affects our lives. This study is proposed to better understand how people use specific functions within the application for relationship maintenance. Participants will complete an online survey in which they will be randomly assigned to a hypothetical Instagram post. They will be told to imagine that it is either posted by a close friend or by an acquaintance in order to better understand how people treat in-group or out-group members. Their liking, commenting and unfollowing behaviors will be assessed, followed by various open-ended questions asking them about their reasoning for why they would like or not like the post, and so on. The results are expected to show that participants are more lenient and accepting of their friend’s offensive posts. They will also like and comment more on their friend’s post than on the acquaintance’s post, and will only unfollow an acquaintance. The severity of offensiveness will not matter as much for friend posts as it will for acquaintances. In the open-ended response section, their reasoning for why these findings are true will relate to Social Identity Theory because they will want to support their in-group members more, showing preferential treatment. It will also support Social Exchange Theory as they will run a cost-benefit analysis, evaluating whether or not it would be more harmful to the relationship if they did not interact, or more harmful to their reputation if they interact.

The goal of this study was to understand how a secondary principal uses a distributed perspective of leadership to support informal teacher leaders (ITLs) to improve classroom technology integration. Using a phenomenological lens, I employed a multi-site case study to inform the research goals. A conceptual framework based on Bandura’s (1977) social learning theory and Wenger’s (1998) communities of practice theory was used to guide the study’s methods and data collection. Data were collected in three phases. At each site, the first phase consisted of a digital survey with only closed-ended questions that was administered to all classroom teachers. The survey was analyzed using social network analysis to identify the ITLs at each school. During the second phase, individual interviews with the ITLs and the principal as well as a follow-up focus group interview with ITLs at each school were conducted. During the final phase of data collection, I observed the ITLs at work to understand how they embodied informal teacher leadership. Analyses of diverse data revealed how a principal influences the nature of informal teacher leadership in a school. Findings revealed that principals establish cultural expectations using teacher voice in leadership decisions, modeling the effective use of education technology, providing in-school and out-of-school leadership opportunities for ITLs, and establishing expectations for all teachers to assume roles of instructional leadership. It was clear in this study that although principals are not directly connected to the informal leading and learning network that occurs in a school, they indirectly influence the informal network by establishing school-wide cultural expectations for informal teacher leadership and by personally interacting with the ITLs.

Not only has gang membership been expanding, but the formation of cooperative ties with Mexican drug trafficking organizations (MDTOs) has been increasing as well. Collaborative relationships with MDTOs appear to be the driving force behind the continuing gang expansion and its subsequent effects. Using social network analysis, this study examines the linkage between MDTOs and American-based gang activity and the potential influence that MDTOs may have in U.S. drug market through their associations with American street gangs. Findings show the MDTOs to be extensively linked to each other by their affiliations with U.S. gangs, and a high level of connectivity exists between U.S. gangs and MDTOs. In addition, various centrality measures indicate the Sinaloa Cartel to have the broadest reach into the illicit drug market, as this cartel is affiliated with the highest number of gangs. The current study provides support for the continuance of multijurisdictional collaboration, and reaffirms the need for law enforcement to continue to explore the non-traditional approaches to crime and intelligence analysis.

La presente investigación tuvo como objetivo describir la relación entre la adicción a las redes sociales y la ansiedad manifiesta en adolescentes de un colegio particular en Lima. El diseño fue de tipo no experimental correlacional y transversal. La muestra fue no probabilística intencional y estuvo conformada por 227 participantes de los cuales el 42.3% fueron mujeres y el 57.7% fueron varones. Se aplicaron los cuestionarios de Adicción a las Redes Sociales (ARS) de Salas y Escurra (2014) y la Escala de Ansiedad Manifiesta en Niños (CMAS-R) en la versión adaptada a la población peruana de Domínguez, Villegas y Padilla (2013). Dentro de los principales resultados se comprobó que, existe relación entre las variables estudiadas; por lo tanto, a mayor adicción a las redes sociales existe mayor ansiedad manifiesta. Además, se encontró diferencias entre varones y mujeres, siendo ellas las que puntúan más alto en ambas escalas. Asimismo, se comprobó que a mayor tiempo de conexión a las redes sociales, mayor es la adicción a estas. / The objective of this research was to describe the relationship between addiction to social networks and anxiety manifested in adolescents of a private school in Lima. The methodology was non-experimental correlational and transversal. The sample was not intentionally probabilistic and consisted of 227 participants, of which 42.3% were women and 57.7% were men. The questionnaire of Addiction to Social Networks (ARS) of Salas and Escurra (2014) and the Questionnaire of Manifest Anxiety in Children (CMAS-R) in the adapted version to the Peruvian population of Domínguez, Villegas and Padilla (2013) were applied. Among the main results, it was found that there is a relationship between the variables studied; therefore, the greater the addiction to social networks there is greater manifest anxiety. In addition, differences were found between men and women, with women scoring higher on both scales. Also, it was found that the longer the connection to social networks, the greater the addiction to these. / Tesis

The goal of this master thesis is to design and implement an analytical application for Security Information Service by providing a software prototype. The solution proposes an enhancement of existing graph that allows security analytics to analyse, edit and visualize objects and relations that are saved into a relational database. In the thesis, we walk through the process of development step by step. First, we investigate the current version software and the requirements of the customer. Afterwards, we design the architecture to be easily extendable with new modules and reliable libraries. In the next step, we implement the application, present our solution to the customer and conduct excessive testing. The final step is evaluating our solution by comparing it to the current software solution in use.

O principal objetivo desta dissertação foi analisar a conformação e as características de arranjos intersetoriais, desde a formulação até a implementação dos projetos, considerando o papel dos atores estatais e da sociedade civil e suas relações como dimensões integrantes do estudo. A fim de superar as abordagens normativas em torno da intersetorialidade, analisamos empiricamente dois casos: o projeto Oficina Boracea, cuja análise foi dividida em momento inicial de implementação (T0 2002/2004) e momento atual (T1 2007/2016); e o Programa De Braços Abertos (DBA), desde sua formulação, em 2013, até 2016. Inscritos em contextos e tempos diferentes, ambos foram desenvolvidos pela Prefeitura de São Paulo enquanto experiências inaugurais de acolhida e atenção à população em situação de rua, embora atendam públicos em situações de vulnerabilidade social com nuances distintas. Por meio da metodologia de análise de redes sociais, o trabalho aqui realizado investigou a dinâmica relacional entre os atores e como essas relações estabelecidas ajudaram a definir padrões de intersetorialidade distintos. Em linhas gerais, observamos os fatores que influenciaram a consolidação de três arranjos de intersetorialidade. No caso do Boracea T0, os arranjos intersetorial e de governança apresentaram um claro destaque da pasta de assistência social e de organizações da sociedade civil (OSCs) conveniadas, bem como uma articulação efetiva com a saúde e relações pontuais com outros setores. No Boracea T1 observamos uma intensa articulação entre agentes implementadores das OSCs da assistência social e da saúde, porém com dificuldades para chegar ao alto escalão e influenciar em decisões mais estruturantes. Já no DBA, o arranjo observado envolveu a efetiva articulação de cinco setores de governo e OSCs, com fluxos bem definidos entre os três escalões burocráticos envolvidos. Desse modo, verificamos empiricamente que a intersetorialidade, mais do que um modelo de gestão bem formulado, é produto de interações cotidianas, sendo permeada por combinações distintas de fatores que definem a efetivação de arranjos diversos / The main goal of this dissertation was to analyze both form and characteristics of intersectoral arrangements, from the formulation to implementation instances of the projects, considering the role of state actors and civil society and their relations as inherently dimensions of the analysis. In order to overcome the normative approaches around intersectoriality, we empirically analyzed two cases: the Oficina Boracea project, whose analysis was divided into initial moment of implementation (T0 - 2002/2004) and current moment (T1 - 2007/2016); and the De Braços Abertos (DBA), from its formulation in 2013 to 2016. Registered in different contexts and times, both were developed by São Paulo City Hall as breaking through experiences of homeless welcoming and caring, although attending to public in situations of social vulnerability with different nuances. Through the methodology of social network analysis, this dissertation investigated the relational dynamics among the actors and how these established relationships helped to define different patterns of intersectoriality. In general terms, we observed the factors that influenced the consolidation of three intersectoral arrangements. In the case of Boracea T0, the intersectoral and governance arrangements presented a clear focus on the Social Assistance Department and on the civil society organizations (CSOs), as well as an effective articulation with Health Department and some punctual relations with other sectors. In Boracea T1, we observed an intense articulation between implementing agents from CSOs and from Social Assistance and Health Departments, but with difficulties in reaching the top command in order to influence more structuring decisions. In DBA, the observed arrangement presents an effective articulation of five sectors of government and the CSOs, with flows well defined among the three bureaucratic levels involved. In this way, we empirically verify that intersectorality, rather than a well-formulated management model, is the product of everyday interactions, imbued by distinct combinations of factors that define the effectiveness of diverse arrangements

This dissertation studies bad behavior at large-scale using data traces from online video games. Video games provide a natural laboratory for exploring bad behavior due to their popularity, explicitly defined (programmed) rules, and a competitive nature that provides motivation for bad behavior. More specifically, we look at two forms of bad behavior: cheating and toxic behavior. Cheating is most simply defined as breaking the rules of the game to give one player an edge over another. In video games, cheating is most often accomplished using programs, or "hacks," that circumvent the rules implemented by game code. Cheating is a threat to the gaming industry in that it diminishes the enjoyment of fair players, siphons off money that is paid to cheat creators, and requires investment in anti-cheat technologies. Toxic behavior is a more nebulously defined term, but can be thought of as actions that violate social norms, especially those that harm other members of the society. Toxic behavior ranges from insults or harassment of players (which has clear parallels to the real world) to domain specific instances such as repeatedly "suiciding"" to help an enemy team. While toxic behavior has clear parallels to bad behavior in other online domains, e.g., cyberbullying, if gone unchecked it has the potential to "kill" a game by driving away its players. We first present a distributed architecture and reference implementation for the collection and analysis of large-scale social data. Using this implementation we then study the social structure of over 10 million gamers collected from a planetary scale Online Social Network, about 720 thousand of whom have been labeled cheaters, finding a significant correlation between social structure and the probability of partaking in cheating behavior. We additionally collect over half a billion daily observations of the cheating status of these gamers. Using about 10 months of detailed server logs from a community owned and operated game server we next analyze how relationships in the aforementioned online social network are backed by in-game interactions. Next, we use the insights gained and find evidence for a contagion process underlying the spread of cheating behavior and perform a data driven simulation using mathematical models for contagion. Finally, we build a model using millions of crowdsourced decisions for predicting toxic behavior in online games. To the best of our knowledge, this dissertation presents the largest study of bad behavior to date. Our findings confirm theories about cheating and unethical behavior that have previously remained untested outside of controlled laboratory experiments or only with small, survey based studies. We find that the intensity of interactions between players is a predictor of a future relationship forming. We provide statistically significant evidence for cheating as a contagion. Finally, we extract insights from our model for detecting toxic behavior on how human reviewers perceive the presence and severity of bad behavior.

Social networking for enterprises is the use of emergent social software platforms within or between companies to enable participants to rendezvous, connect or collaborate through computer-mediated communication and to form online communities (McAfee, 2006). It provides a platform for participants to co-create social networks that permit the exchange and retrieval of relevant knowledge on a company-built platform. The objective of this research is to understand the characteristics and development of social network applications in different types of enterprises. We discuss the key factors for companies to develop their own social network using web 2.0. Based on the classification of customizing products (Pine, 1993), this study uses multiple case studies and the characteristics of their social networks such as service, marketing and collaboration to see how social networking on web 2.0 helps customize products for business benefits. The findings of the study are that with different types of customizing products, the company will have a different focus in its value chain. We explored these differences by constructing a two-way model. Using the two-way model, our study separates the different types of products into four sectors: provider, listener, promoter and collaborator. The four sectors can describe the purpose of the product using the social network and gives advice that is relevant to similar types of companies.

It has been said that the XXI century is the century of people; social media, web2.0 applications and other technology breakthroughs have made the world every single day a smaller place. iChina forum takes advantage of all available existing technology to provide seasoned China experts with a platform that help them share their knowledge with the world. Our purpose is to enhance the mutual understanding between east and west towards and harmonic future. This business plan explains how through the use of open source development tools, a network of partnerships and social media marketing a low cost internet startup is possible.

The amount of information on the Web is spreading very rapidly. Users as well as companies bring data to the network and are willing to share with others. They quickly reach a situation where their information is hosted on many machines they own and on a large number of autonomous systems where they have accounts. Management of all this information is rapidly becoming beyond human expertise. We introduce WebdamExchange, a novel distributed knowledge-base model that includes logical statements for specifying information, access control, secrets, distribution, and knowledge about other peers. These statements can be communicated, replicated, queried, and updated, while keeping track of time and provenance. The resulting knowledge guides distributed data management. WebdamExchange model is based on WebdamLog, a new rule-based language for distributed data management that combines in a formal setting deductiverules as in Datalog with negation, (to specify intensional data) and active rules as in Datalog:: (for updates and communications). The model provides a novel setting with a strong emphasis on dynamicity and interactions(in a Web 2.0 style). Because the model is powerful, it provides a clean basis for the specification of complex distributed applications. Because it is simple, it provides a formal framework for studying many facets of the problem such as distribution, concurrency, and expressivity in the context of distributed autonomous peers. We also discuss an implementation of a proof-of-concept system that handles all the components of the knowledge base and experiments with a lighter system designed for smartphones. We believe that these contributions are a good foundation to overcome theproblems of Web data management, in particular with respect to access control.