A presente Dissertação propôs a interação - por meio da criação artística - entre dois grupos de crianças, residentes em Porto Alegre-RS e Cumuruxatiba-BA. A pesquisa de campo consistiu na realização de 12 encontros em Porto Alegre e 10 encontros em Cumuruxatiba realizados entre os meses de junho a dezembro de 2014. O estudo buscou compreender as visões que as crianças produziram sobre si e sobre o outro a partir da correspondência estabelecida pelos grupos. Neste contexto, o principal objetivo do trabalho constou em analisar as possibilidades de criação e de invenção de si mesmo na interação com crianças de um contexto distante. Esta pesquisa discute o deslocamento e o encontro com a alteridade como proposições metodológicas no ensino da arte. Problematizam-se neste trabalho os conceitos de alteridade e deslocamento a partir de Bakthin, Foucault e Onfray; o conceito de infância a partir de Larrosa, Kristeva e Kohan e as proposições artísticas de caráter colaborativo a partir de Bourriaud e Laddaga. Como eixo metodológico, apresenta projetos e obras de artistas e educadores contemporâneos. Dentre os elementos centrais de análise, estão a relação de alteridade e estranhamento a partir da qual as crianças modificam a relação de si para si mesmo e de si para o outro por meio do olhar. A partir destes elementos a experiência estética é apresentada como meio de reconstrução do entendimento do outro. / This Dissertation proposed interaction - through artistic creation - between two groups of children, one living in Porto Alegre-RS and the other living in Cumuruxatiba, Bahia. The field research consisted of 12 meetings in Porto Alegre and 10 meetings in Cumuruxatiba carried out between the months of June and December 2014. The study sought to understand the visions that children produce about themselves and each other from the established correspondence by the groups. In this context, the main objective of the study consisted in analyzing the possibilities of creation and invention of oneself throug interaction with children from a distant context. This research also discusses the displacement and the encounter with otherness as methodological propositions in art education. To problematize in this work the concepts of otherness and displacement from Bakhtin, Foucault and Onfray; the concept of childhood from Larrosa, Kristeva and Kohan and artistic propositions collaborative character from Bourriaud and Laddaga. As a methodological line, the research presents projects and works of contemporary artists and educators. Among the central elements of analysis, are otherness relationship and estrangement from which children change the relation of himself to himself and of himself to the other through the use of the vision. From these elements aesthetic experience is presented as a means for reconstruction of THE understanding of the other (OTHERNESS?).

Os ganhos competitivos adquiridos pela ação coletiva, através do fenômeno de formação de redes colaborativas, podem ser considerados respostas a uma série de pressões do ambiente econômico que limitam ou restringem a competitividade das empresas no início da era da globalização. Estruturada em torno de informações e relações sociais, a partir de 1990 vem se consolidando uma nova abordagem no campo da estratégia, que se propõem a analisar as organizações em âmbito interno, defendendo que as principais fontes de competitividade empresarial são endógenas. Um dos recursos endógenos recorrentes em estudos acadêmicos e empíricos na explicação do desempenho de comunidades e nações, ao longo das últimas duas décadas foi o capital social. Neste sentido, o capital social, torna-se um recurso marcadamente competitivo, funcionando como um potencializador da capacidade individual e coletiva mediante práticas colaborativas podendo tornar-se fonte de melhoria ou manutenção da competitividade em empresas associadas em redes colaborativas. Esta é uma afirmação essencial para o presente estudo, que teve como objetivo geral verificar a relação do capital social com a competitividade das redes colaborativas vitivinícolas da Serra Gaúcha através de estudo nas redes APROVALE e APROBELO, enquanto que os objetivos específicos foram a identificação dos fatores explicativos do capital social, e da competitividade, verificação de características empresariais que interferem na manifestação destes construtos, bem como análise das suas correlações e por fim comparação dos níveis de capital social e competitividade nas duas redes estudadas. Quanto a metodologia, utilizou-se uma survey para medição de capital social e competitividade que foi fruto do trabalho do grupo de pesquisa TSO (Teoria Social em Organizações) e como principais técnicas de análise estatística utilizou-se análise fatorial, regressão linear, correlação bivariada de Pearson, análise de variância e estatísticas descritivas. Como principais resultados do estudo estão à presença de altos índices de capital social no cluster vitivinícola da Serra Gaúcha, distribuídos uniformemente entre as três dimensões estudadas, às altas correlações presentes entre o capital social e a melhoria da competitividade, os altos coeficientes de determinação entre eles, bem como, que estes dois construtos compartilham variáveis determinantes e essencialmente subjetivas. Ainda, perante os resultados tornou-se possível afirmar que diferentes combinações de elementos vinculados aos dois construtos levam a resultados diferenciados, ou a realidades organizacionais idiossincráticas. O estudo finaliza destacando as contribuições confirmadas pela literatura pesquisada, as contribuições discrepantes em relação a literatura pesquisada, contribuições metodológicas, limitações da pesquisa e sugestões para estudos futuros. / The competitive gains acquired by collective action, through the phenomenon of collaborative networks can be considered responses to a series of pressures of the economic environment that limit or restrict the competitiveness of companies in the early age of globalization. Structured around information and social relations since 1990 has consolidated a new approach in the field of strategy, they propose to analyze organizations in the domestic sphere, arguing that the main sources of business competitiveness are endogenous. One of the endogenous resources in academic studies and empirical explanation of the performance of communities and nations, over the past two decades has been the social capital. In this sense, social capital becomes a resource strongly competitive, functioning as an enhancer of the individual and collective capacity through collaborative practices can become a source of improvement or maintenance of the competitiveness of member companies through collaborative networks. This is a key statement for the present study, which aimed to verify the relationship of social capital and competitiveness of collaborative networks of Serra Gaucha Wine cluster by studying networks APROVALE and APROBELO, while the specific objectives were to identify the factors explain the social capital and competitiveness, verification of company characteristics that influence the expression of these constructs as well, analysis of their correlations and finally comparing the levels of social capital and competitiveness of the two studied networks. For the methodology, we used a survey to measure social capital and competitiveness was the result of work of the research group TSO (Social Theory in Organizations) and the main statistical analysis used the factor analysis, linear regression, bivariate correlation Pearson, analysis of variance and descriptive statistics. The main results of the study are the presence of high levels of social capital in the Serra Gaúcha wine cluster evenly distributed between the three dimensions studied, the present high correlations between social capital and improve competitiveness, too distributed on three dimensions, the high correlation coefficients among them, and that these two constructs share determinant variables and essentially subjective. Still, before the results became possible to say that different combinations of elements linked to the two constructs lead two different results, or the idiosyncratic organizational realities. The study concludes highlighting the contributions confirmed by the literature, the differing contributions for literature, methodological contributions, research limitations and suggestions for future studies.

Robots have become increasingly adept at performing a wide variety of tasks in the world. However, many of these tasks can benefit tremendously from having more than a single robot simultaneously working on the problem. Multiple robots can aid in a search and rescue mission each scouting a subsection of the entire area in order to cover it quicker than a single robot can. Alternatively, robots with different abilities can collaborate in order to achieve goals that individually would be more difficult, if not impossible, to achieve. In these cases, multi-robot collaboration can provide benefits in terms of shortening search times, providing a larger mix of sensing, computing, and manipulation capabilities, or providing redundancy to the system for communications or mission accomplishment. One principle drawback of multi-robot systems is how to efficiently and effectively generate plans that use each of the team members to their fullest extent, particularly with a heterogeneous mix of capabilities. Towards this goal, I have developed a series of planning algorithms that incorporate this collaboration into the planning process. Starting with systems that use collaboration in an exploration task I show teams of homogeneous ground robots planning to efficiently explore an initially unknown space. These robots share map information and in a centralized fashion determine the best goal location for each taking into account the information gained by other robots as they move. This work is followed up with a similar exploration scheme but this time expanded to a heterogeneous air-ground robot team operating in a full 3-dimensional environment. The extra dimension adds the requirement for the robots to reason about what portions of the environment they can sense during the planning process. With an air-ground team, there are portions of the environment that can only be sensed by one of the two robots and that information informs the algorithm during the planning process. Finally, I extend the air-ground robot team to moving beyond merely collaboratively constructing the map to actually using the other robots to provide pose information for the sensor and computationally limited team members. By explicitly reasoning about when and where the robots must collaborate during the planning process, this approach can generate trajectories that are not feasible to execute if planning occurred on an individual robot basis. An additional contribution of this thesis is the development of the State Lattice Planning with Controller-based Motion Primitives (SLC) framework. While SLC was developed to support the collaborative localization of multiple robots, it can also be used by a single robot to provide a more robust means of planning. For example, using the SLC algorithm to plan using a combination of vision-based and metric-based motion primitives allows a robot to traverse a GPS-denied region.

A Mobile Ad hoc Network (MANET) consists of a set of communicating wireless mobile nodes or devices that do not have any form of fixed infrastructure or centralized authority. The security in MANET has become a significant and active topic within the research community. This is because of high demand in sharing streaming video and audio in various applications, one MANET could be setup quickly to facilitate communications in a hostile environment such as battlefield or emergency situation likes disaster rescue operation. In spite of the several attacks aimed at specific nodes in MANET that have been uncovered, some attacks involving multiple nodes still receive little attention. A reason behind this is because people make use of security mechanisms applicable to wired networks in MANET and overlook the security measures that apply to MANET. Furthermore, it may also have to do with the fact that no survey or taxonomy has been done to clarify the characteristics of different multiple node attacks. This thesis addresses the aforementioned gap by providing a proper definition and categorization of collaborative attacks against MANET from the various multiple node attacks found. Simulation using OPNET Modeler was used to investigate the performance impact of a collaborative blackhole attack on a mobile ad hoc network. Network throughput, packet delivery ratio and end-to-end delay are the performance metrics used in our result analysis. Based on the analyses of performance metrics made, we realised the consequences of a collaborative blackhole attack on MANET. In order to prevent or reduce these consequences, we also discuss a number of mitigation plans to counteract the different kinds of collaborative attacks. Keywords: MANET, Collaborative Attacks, Multiple Node, Blackhole. / Contact Information: Author(s): Cong Hoan Vu Address: Folkparksvägen 19:08, 372 40 Ronneby, Sweden. E-mail: vuconghoan@gmail.com Adeyinka Soneye Address: Polhemsgatan 27B, LGH 30, 371 40 Karlskrona, Sweden. E-mail: adso07@student.bth.se

The thesis investigates the possibility to enrich standard mobile phone calls with cooperative web applications. Originating from the research field know as Computer Supported Cooperative Work (CSCW) this thesis report introduces and describes the implementation of several applications which can be used by the calling parties together during a phone call. Additionally, the report describes a proof-of-concept prototype for the Android platform, and discusses the performance of cooperative web application running on mobile devices in terms of network and CPU use. The conclusions of the thesis describe a prototype application addressing and implementing the requirements as described by the theory of computer supported collaborated work. The performance of the running application showed to be satisfactory, both regarding to network demand and processor use.

This thesis describes the process of conceptualizing and developing a recommendersystem for a peer-to-peer commerce application. The application in question is calledPlick and is a vintage clothes marketplace where private persons and smaller vintageretailers buy and sell secondhand clothes from each other. Recommender systems is arelatively young field of research but has become more popular in recent years withthe advent of big data applications such as Netflix and Amazon. Examples ofrecommender systems being used in e-marketplace applications are however stillsparse and the main contribution of this thesis is insight into this sub-problem inrecommender system research. The three main families of recommender algorithmsare analyzed and two of them are deemed unfitting for the e-marketplace scenario.Out of the third family, collaborative filtering, three algorithms are described,implemented and tested on a large subset of data collected in Plick that consistsmainly of clicks made by users on items in the system. By using both traditional andnovel evaluation techniques it is further shown that a user-based collaborative filteringalgorithm yields the most accurate recommendations when compared to actual userbehavior. This represents a divergence from recommender systems commonly usedin e-commerce applications. The paper concludes with a discussion on the cause andsignificance of this difference and the impact of certain data-preprocessing techniqueson the results.

Engineering educators have called for research on how best to foster and assess the development of collaborative expertise, particularly around engineering design. Mental models are internal representations depicting understanding. The quality of mental models and their similarity amongst group members have been found to influence performance and group processes in a range of disciplines: For example, flight, military, medical, and business teams. The purpose of this thesis was to examine three attributes (content, structure, within-group similarity) of the mental models of first-year undergraduate engineering students hold about both collaboration and engineering design in the context of a course-based engineering design project. Participants were 251 undergraduate engineering students enrolled in a first-year engineering course. Mental models were measured using relatedness ratings. This exploratory study drew upon network analysis indices and used descriptive, correlational, and comparative statistical techniques. Findings indicate (a) monitoring was viewed as the least central collaborative idea represented in the engineering students’ mental models, (b) quality or expertise is indicated by the level of connection pruning in students’ mental models, (c) performance and the quality of mental models of collaboration are associated, and (d) within-group collaborative mental model compatibility was more related to performance than mental model overlap. This study contributes to engineering education by suggesting mental models of the collaborative process are an essential factor to consider when preparing undergraduate engineering students to engage in collaborative engineering design. / Graduate

Dans ce travail de recherche, nous nous sommes intéressés à la conception et au développement d'un système iNformatIque COmmunautaire mobiLe et AdapTatif, appelé NICOLAT. Ce dernier vise à supporter une CoP dans laquelle l'apprentissage s'effectue via la résolution communautaire de problèmes en offrant des solutions qui permettent de limiter les facteurs qui peuvent aboutir à la démotivation des membres de la CoP.Pour expérimenter et valider les solutions que nous proposons à travers ce système, nous ciblons la CoP des enseignants usagers de la méthode pédagogique MAETIC, qui peuvent rencontrer, en classe, des problèmes dans l'usage de celle-ci.Ainsi, nos principales contributions se résument dans les points suivants : 1) La mise en place du noyau communautaire du système NICOLAT. Ce dernier est sous forme d'un réseau social supportant la résolution communautaire de problèmes, 2) La mise en place d'une couche de résolution de problèmes ayant pour objectif d'aider le membre à résoudre son problème par exploitation de l'historique des problèmes résolus dans le passé. Ceci pour minimiser le nombre de demandes d'aide répétitives. Le cycle du raisonnement RàPC (Raisonnement à Partir de Cas) a été utilisé pour guider ce processus, 3) La mise en place de deux couches d'adaptation permettant de supporter les interactions des membres dans les outils d'interaction qu'ils préfèrent ou avec lesquels ils sont familiarisés le plus. L'objectif visé par cette adaptation est, d'une part, de dépasser les problèmes de prise en main de nouveaux outils d'interaction. D'autre part, de permettre l'accès au système en cas de mobilité et minimiser ainsi le temps de réponse, 4) La mise en place d'une approche de sélection des membres qui peuvent contribuer positivement à résoudre un problème à qui faire aboutir la demande d'aide. L'objectif est de permettre à un membre cherchant à résoudre son problème de recevoir une réponse pertinente / In this research work, we focused on design and development of an adaptive and mobile community system, called NICOLAT (iNformatIque COmmunautaire mobiLe et AdapTatif). The latter aims to support a Community of Practice (CoP) in which learning is done through community problem solving by providing solutions that limit the factors that can lead to the demotivation of the CoP members.To experiment and validate the solutions we provide through this system, we target the CoP of teachers users of the MAETIC pedagogical method, who can meet, in classroom, problems in the use of it.Thus, our main contributions are summarized in the following points: 1) Establishment of community kernel of the NICOLAT system. The latter is as a social network supporting the community solving of problems, 2) Implementation of problems resolution layer that aims to help the member solve his problem through the exploitation of the history of problems solved in the past. This is to minimize the number of repetitive help requests. The cycle of the CBR (Case-Based Reasoning) was used to guide this process, 3) Establishment of an interactions adaptation layer to support the members' interactions in the interaction tools they prefer or with which they are most familiar. The purpose of this adaptation is, firstly, to exceed the problems of interaction tools manipulation. On the other hand, to enable access to the system in case of mobility and thereby minimize response time, 4) Establishment of a dynamic approach of selection of members who can contribute positively to solve a problem, to whom bring the help requests. The objective is to enable a member seeking to solve his problem to receive a relevant answer

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Abstract The focus of this thesis is on perceivable interaction forms that can be utilised in multi-player computer games and Collaborative Virtual Environments (CVEs). Interaction forms are manifestations of user-user and user-environment interaction. These forms convey the actions of the user to others, and to oneself, during synchronous communication and interaction partially resembling face-to-face encounters in the physical world. The communication, co-ordination and collaboration difficulties in current 3D CVEs have yet to be overcome. The aim of this thesis is to conceptualise and delineate the available mutually perceivable interaction forms. The research analyses entertainment industry solutions and examines their potential as providers of design implications for CVE systems in general. Furthermore, games are used as platforms in the construction phases of the research. The research answers the problems of what interaction forms exist in multi-player games and what are their main characteristics and how to apply the understanding of possible interaction forms in order to help the design of games and professionally used CVEs? The problems are approached with conceptual analytical and constructive methods. Delineation and categorisation of various interaction forms in games and CVEs is presented. The gap between theoretical models and practical design is bridged by using several empirical cases as a constructive part of the research. The significance of this research is related to the increasingly important role of CVEs in global organisations and virtual enterprises, as well as in the everyday life of people. The communicational and functional enhancements of the virtual environments and multi-player games make the interpersonal interaction more usable and applicable in computer mediated settings. The research provides a deeper understanding of the concept of interaction forms in the context of CVEs and multi-player games. The results can be used to create more supportive, appealing and communicative applications by applying interaction models and theories in the form of rich interaction design guidelines. The main contributions of this research are the conceptual models of interaction forms and corresponding rich interaction design suggestions. The results reveal important and neglected aspects of interaction forms to the world of game and virtual environment designers. Combined with the descriptions of interaction design processes the overall outcome of the work is applicable to a wide audience designing or using computer systems that support communication, co-ordination and collaboration.