O trabalho evidencia um novo modelo de gestão e funcionamento do sistema da arte no Brasil, considerando a emergência de dois novos atores e de um tipo específico de instituição cultural a partir dos anos oitenta. Nesse sentido, analisa as atuações de curadores, produtores e plataformas culturais articuladas a corporações bancárias no destino de artistas e obras no contexto da história da arte na contemporaneidade. Para tanto, focaliza a atuação do Itaú Cultural, em São Paulo, e do Centro Cultural do Banco do Brasil do Rio de Janeiro, no período de 2000 a 2005, da qual são selecionados para entrevista um grupo de curadores, produtores culturais e artistas, além dos gestores das instituições. O objetivo do estudo é mostrar como o regime de eventos passou a vigorar no sistema, influenciado pela ação do Estado e das infra-estruturas emergentes, responsáveis pela circulação e visibilidade da produção artística. / The current paper highlights a new management and functioning model for the art system in Brazil, considering the emergence of two new agents and a specific type of cultural institution which appeared in the 1980´s. Thus, it analyses the work of curators, producers and also cultural platforms related to bank corporations in the career of artists and their works in the context of contemporary history of art. In order to reach that goal, it focuses on the work of Itaú Cultural in São Paulo and Centro Cultural Banco do Brasil in Rio de Janeiro from the year 2000 to 2005. It was selected a group of curators, producers, artists and managers of the institutions to take part in the interviews. The aim of the study is to show how a policy of events started to exist in the system, influenced by the action of the estate and the emerging infrastructure, which are responsible for the visibility and circulation of artistic production.

À medida que a ciência avança, muitas aplicações em diferentes áreas precisam de grande poder computacional. A computação em grade é uma importante alternativa para a obtenção de alto poder de processamento, no entanto, esse alto poder computacional deve ser bem aproveitado. Mediante o uso de técnicas de escalonamento especializadas, os recursos podem ser utilizados adequadamente. Atualmente existem vários algoritmos propostos para computação em grade, portanto, é necessário seguir uma boa metodologia para escolher o algoritmo que ofereça melhor desempenho, dadas determinadas características. No presente trabalho comparamos os algoritmos de escalonamento: Heterogeneous Earliest Finish Time (HEFT), (b) Critical Path on a Processor (CPOP) e (c) Path Clustering Heuristic (PCH); cada algoritmo é avaliado com diferentes aplicações e sobre diferentes arquiteturas usando técnicas de simulação, seguindo quatro critérios: (i) desempenho, (ii) escalabilidade, (iii) adaptabilidade e (iv) distribuição da carga do trabalho. Diferenciamos as aplicações para grade em dois tipos: (i) aplicações regulares e (ii) aplicações irregulares; dado que em aplicações irregulares não é facil comparar o critério de escalabilidade. Seguindo esse conjunto de critérios o algoritmo HEFT possui o melhor desempenho e escalabilidade; enquanto que os três algoritmos possuem o mesmo nível de adaptabilidade. Na distribuição de carga de trabalho o algoritmo HEFT aproveita melhor os recursos do que os outros. Por outro lado os algoritmos CPOP e PCH usam a técnica de escalonar o caminho crítico no processador que ofereça o melhor tempo de término, mas essa abordagem nem sempre é a mais adequada. / As science advances, many applications in different areas need a big amount of computational power. Grid computing is an important alternative to obtain high processing power, but this high computational power must be well used. By using specialized scheduling techniques, resources can be properly used. Currently there are several algorithms for grid computing, therefore, is necessary to follow a good methodology to choose an algorithm that offers better performance given certain settings. In this work, we compare task dependent scheduling algorithms: (a) Heterogeneous Earliest Finish Time (HEFT), (b) Critical Path on a Processor (CPOP) e Path Clustering Heuristic (PCH); each algorithm is evaluated with different applications and on different architectures using simulation techniques, following four criterias: (i) performance, (ii) scalability, (iii) adaptability and (iv) workload distribution. We distinguish two kinds of grid applications: (i) regular applications and (ii) irregular applications, since in irregular applications is not easy to compare scalability criteria. Following this set of criteria the HEFT algorithm reaches the best performance and scalability, while the three algorithms have the same level of adaptability. In workload distribution HEFT algorithm makes better use of resources than others. On the other hand, CPOP and PCH algorithms use scheduling of tasks which belong to the critical path on the processor which minimizes the earliest finish time, but this approach is not always the most appropriate.

The flexibility offered by mobile agents is quite noticeable in distributed computing environments. But the flexibility comes with a set of new levels of complexity due to their autonomous nature. The mobile agent paradigm introduce additional threats since agents systems are prone to failures originating from bad communication, security attacks, agent server crashes, system resources unavailability, network congestion or even deadlock situations. In such events, mobile agents either get lost or damaged (partially or totally) during execution. In order to gain solid foundation at the heart of today’s e-society, the mobile agent technology paradigm must address the issue of reliability. Making mobile agents fault tolerant is a measure taken to increase the dependability and reliability of agent-based application. Mobile agent’s fault tolerance is gaining momentum and many approaches have been proposed. Despite these efforts, the field still suffers from set backs in the form of persistent challenges. This study analyzes the existing fault tolerance approaches against a proposed generic fault tolerance framework that consists of a monitoring, planning and recovery process execution phases. Following the analysis, this study brings about the state-of-the-art in mobile agent’s fault tolerance approaches and the lingering challenges that affect mobile agent’s fault tolerance implementations from being efficiently and fully realized. The study will serve as a guide to future researches and possible solution for a more reliable and transparent fault tolerance in mobile agents.

This master thesis is the qualitative research with a question whether principles Web 2.0 when implemented, could bring change to organizational knowledge process and influence barriers to knowledge sharing. Nowadays all the constantly growing companies present on the international market has their offices in many countries, separated not only by distance, but also by culture and working hours. This working style brings a lot of benefits to them on local markets, but it also brings some troubles and challenges in terms of management of whole enterprise. The obligatoriness of managing the tacit knowledge sharing is becoming more considerable, because companies face with a problem to bridge the knowledge gap between more experienced employees and new ones. The discussion about how to collect that knowledge and transfer it is still open. This case is sensible for big firms with departments which consult other employees, which are the main focus of this study. In this study there researched and found factors that influence social learning and knowledge sharing in the view of enterprise companies. Research found strong and weak sides of the currently implemented knowledge sharing systems at all and from the point of view of enterprise companies. This research used the qualitative research method as there is the need of exact understanding of how implementing of this system can improve work processes or what discomfort it can bring. In the analysis chapter factors that have direct influence on social knowledge sharing was found and analyzed. In discussion chapter suggestions to the company for further developing and improving present situation was provided.

There exist several known methods for calculation of radio coverage for ground-based systems. As far as we know there are no equivalent methods for the case of flying platforms when the altitudes and speeds are significantly different to those of ground-based systems. This thesis describes the theoretical concepts behind calculations of radio coverage for flying platforms. An investigation is made to sort out what is important and possible to employ in a model for simulations. A method is described and implemented in a program for evaluation of flying radio systems. Two typical cases of flight missions are simulated and discussed. It is found that the free space model is valid most of the mission time. The contribution from the antennas is found to be small in comparison to the path loss. Further investigations suggested are e.g. better ground reflection models and a better model for the flight mechanics.

Purpose: The purpose of this study is to gain in-depth understanding of the influence of booking channels in the hotel sector on the small hotel's organization. Method: The essay is based on a qualitative multidirectional study conducted with 6 semistructured interviews as a data collection method. Previous research: To give the reader an idea of the subject, previous research and studies summarize the influence of booking channels on hotels in this section. The research lies with the theory section as the basis for the final analysis. Theory: The theory deals with two-sided networks in a platform theory to create understanding of the relationship between users and the platform. The section also discusses two businessmodels, B2B and B2B2C, which describe the business process traditionally and how it developed in line with e-commerce. Empiria: The Empiria section begins with a presentation of the 6 cases investigated and these lected respondents interviewed. The hotels that participated in the survey are Lydmar Hotel, Hellsten Hotels, Mälardrottningen, Sky Hotel Apartments, Hotell Hansson and Hotell Anonym. Finally, the respondents' responses are summarized and linked to the themes identified during the course of data collection. Findings: The results of the study indicate that the major booking channels have a big influence on small hotels but that they contributed to the opportunity for the small hotels to market globally and therefore receive higher occupancy rates than before. The booking channels have also played an important part in Stockholm's destination development.

Intellectual capital is the single most important asset owned by any organization. Business continuity and the long term sustainability of every business organization depends partly on how well accumulated organizational knowledge is passed on from generation to generation. Knowledge is hard to capture due to its implicit nature and even harder to manage, thus the deployment of numerous knowledge management systems by organizations in recent times. Knowledge sharing among employees within organizations can sometimes be very problem-atic. These problems stem from issues pertaining to power, secrecy, individualism, time, ignorance and technological issues among others. This paper seeks to investigate how web 2.0 technologies are being used to overcome these problems and facilitate knowledge sharing as well as collaboration. Web 2.0 has been described as the new web which focuses on the use of platforms. Platforms are digital environments in which contributions and interactions are globally visible. The new web technologies which are based on platforms are referred to as emergent social software platforms (ESSP‘s). The use of these web 2.0 technologies (ESSP‘s) within a business enterprise for the achievement of business goals is known as enterprise 2.0 (E2.0). Central to this research is the knowledge sharing cycle model, which has three main stages; internalization, externalization, and objectification. Internalization occurs when individuals acquire or learn from the organization. Externalization is achieved when individual implicit knowledge is made explicit. Objectification is making new knowledge globally accepted. This cycle has been adapted to illustrate the role played by ESSP‘s in facilitating knowledge sharing. A case study of IBM Corporation is used to arrive at the findings which are used to adapt the model. IBM Corporations extensively deploys E2.0. The company uses one central Social networking platform called IBM connections, which incorporates several ESSP‘s. There are seven services on IBM connections which include profiles, Activities, wikis, blogs, bookmarks, Files, and communities. Employing the interview technique, observations and the use of secondary data, the research questions are answered. The findings indicate that ESSP‘s can be used to support knowledge sharing practices and also helps to convert knowledge into its different forms (explicit and implicit). Blogs, wikis, and communities support internaliza-tion and externalization. The process of objectification is supported by wikis. Findings also indicate that the services within IBM connections platform support mass collaboration and foster strong ties among employees. In an objective manner, the paper points out some of the negative consequences of E2.0. Major issues uncovered through the case study include, sensi-tive data, undefined way of working with ESSP‘s, privacy, abuse of use, and lack of interest.

Mobilmarknaden idag består av ett antal aktörer, Nokia är störst, med Samsung, Motorola, LG, Sony Ericsson och HTC bakom sig. Nokias telefoner bygger på operativsystemet Symbian som idag är det största operativsystemet på marknaden för smartphones. Open Handset Alliance har utvecklat ett eget operativsystem för främst mobiltelefoner, kallat Android, som är bygger på Linuxkärnan. Android är framtaget som ett gratisalternativ till de dyra konkurrerande operativsystemen. Examensarbetets syfte är att studera utvecklingsmiljön till Android och se vilka kunskaper som krävs för att effektivt kunna utveckla applikationer. I detta ingår även att identifiera vilka möjliga problem som kan uppstå under utveckling, samt dokumentera vilka utvecklingsverktyg som finns tillgängliga.   Målet har varit att utreda hur applikationer utvecklas effektivt, det innebär att ta reda på svaren till vad som krävs av utvecklare för att kunna utveckla applikationer, vilka utvecklingsverktyg som finns, samt vilka problem som kan identifieras under utveckling. Studien valdes att genomföras med en kartläggning, för på djupet beskriva operativsystemet och hur dess delar samspelar med varandra.   I studien undersöktes hur plattformen är uppbyggd och vilka fundamentala delar som en applikation består av, samt vilka verktyg som används för att utveckla applikationer. I studien ingick även att utveckla två stycken testapplikationer, en musikigenkänningstjänst och en lokaliseringstjänst. Förutom erfarenhet av utveckling i språket Java krävs förståelse för hur plattformen fungerar och är uppbyggd. Förståelse för plattformen man utvecklar för är alltid viktigt, men Android skiljer sig markant från klassiska plattformar. En utvecklare bör därmed ha specifik förståelse för hur plattformen fungerar, hur applikationer är uppbyggda och hur de körs. Vidare lider Android även av att vara ett ungt operativsystem med bristfällig dokumentation och buggar som kan medföra problem under utveckling av applikationer. Som utvecklare för Android är man förvisad till att använda Eclipse som verktyg, något som fungerar smidigt då de flesta utvecklare i Java är bekanta med Eclipse. Till Eclipse finns även ett debugverktyg som man som utvecklare har stor nytta av. Den viktigaste lärdomen att ha när man utvecklar för Android är som nämnts ovan, att Android skiljer sig markant från klassiska plattformar och på vilket sätt måste ses som grundläggande kunskap för en utvecklare.

This study investigates how non-profit organizations market their organizations and persuades their audience on two different social media platforms. The aim is to examine four non-profit organizations’ use of persuasive language in their Facebook and Twitter posts.  in their Facebook and Twitter posts on their social media pages. The aim is to understand if, how and what linguistic means was are used in the posts through Aristotle’s triangle of rhetoric. His theory consists of the three appeals: ethos, logos and pathos. These three appeals all holds a number of individual features.  with a perspective from classic rhetoric, namely Aristotle’s triangle of rhetoric. The persuasion was examined using Aristotle’s triangle of rhetoric and its appeals ethos, logos, and pathos. The research was carried out by classifying the posts by the three appeals and their features. These defined what linguistic means were used and how. All three appeals are equally important when persuading an audience  public through a text as they are necessary to raise an understanding and interest to the text’s focus. Aristotle argued that when including all three appeals, the text has reached its full extent potential of persuasion. The appeals have their unique attributes and may also persuade when used individually. The An author’s credibility and trust applies to the appeal ethos, logic and reasoning in a of the text applies to logos, and a text that moves its reader’s emotions applies to pathos. The research resulted that aWhether a text’s length matters for its persuasion through a comparison of  the two social media platformshas also been examined through comparing the two social media platformsw. Non-profit organizations do not strive for any profit which make it a challenge for them how to market persuade their organization audience in order and actually be able to be able to continue their work. Many of the posts researched included the appeal pathos which aim mainly to evoke emotions with the readers.

The study investigates the rise of online platforms that support teacher-to-teacher knowledge mobilisation. The adoption of the interpretative approach focuses the investigation on how the online platforms, their resources and the learning opportunities they provide are conceptualised by teachers in relation to their broader teaching practice, workplace culture and professional learning. The study is framed by two overarching research questions. (1) What is the nature of the knowledge being shared and reconstructed by teachers in Internet-mediated knowledge mobilisation? (2) What is the nature of the learning arising from teacher-to-teacher Internet-mediated knowledge mobilisation? The study employs a multiple case-study design to investigate two United States based online platforms, which facilitate teacher-to-teacher knowledge sharing. Twenty teachers from across the two cases were selected to participate in the study. A qualitative methodology was utilised. Teachers participated in an individual, face-to-face interview. In the two months following the initial interview teachers completed a weekly journal log detailing their engagement with the platform. Upon the completion of their journal logs, teachers participated in a follow-up interview via Skype. To help to contextualise the individual teachers within the broader case and to enrich their personal stories, observations of the platforms occurred throughout the data collection period. The study proposes a new theoretical model for how to conceptualise Internet-mediated knowledge mobilisation, the knowledge that is produced and the learning that occurs through the reconstruction process. It emphasises the connection between offline and online contexts and the role the platforms play in breaking down the boundaries between teachers' school-based practice and online resources and learning opportunities. The framework encapsulates the combining of the individual and their contexts of action, together with the platform and the information and knowledge it contains, to determine and shape the operation of the knowledge reconstruction process and the learning that transpires. Internet-mediated knowledge mobilisation facilitates the development of teachers' personal, practical knowledge by providing insight into the instructional practice of teachers and exposing teachers to new ideas and perspectives, which support the expansion of their propositional structures and episodic knowledge. Access to relevant, teacher-created materials increases the efficiency and effectiveness with which teachers can undertake elements of their practice, while also promoting learning through participation in work-based tasks. Individualism emerges as the dominant mode of engagement and learning in the study, with individual teachers regulating not only how and when they engage but also determining the outcomes they construct from their actions. The Internet, as a knowledge mediator, opens up new possibilities that are not available in teachers' offline contexts. It not only breaks down boundaries between teachers, but it also collapses boundaries between the various settings of teachers' professional practice and learning, effectively merging the offline and online contexts of teachers' work. The dual contexts of the platforms offer specific affordances that help to shape teachers' engagement, while also acting to promote new learning processes that do not exist in offline knowledge mobilisation.