WiMAX與3G是目前無線行動寬頻接取技術中，最有可能成為主流的兩種技術。3G進入市場的時間較早，優勢在於具備強大的移動性。但是與其配合的終端裝置大部分為無法執行太多任務的手機，因此在內容服務上並無法獲得良好的發展。另一方面，WiMAX以低成本、高傳輸速率、良好行動性為訴求，緊隨著WiFi的成功之後開始進入無線行動寬頻接取服務的市場。不過一般預期WiMAX早期的應用終端裝置以行動性不高的筆記型電腦為主，並逐漸往高行動性的手持裝置發展。本研究主要探討的主題在於，當WiMAX以新進者的形態進入3G已存在的無線行動寬頻市場時，這兩種相近的技術產生何種競爭與合作的關係。 本研究以產業資料及文獻回顧整合出的探討角度來探討WiMAX與3G可能的競合狀況。另外，本研究也採取專家意見法來獲得實務業界對WiMAX與3G競合狀況的看法，以補足僅以文獻與次級資料探討本研究主題的不足。本研究檢視與整理WiMAX與3G在技術上的表現後發現，WiMAX在技術上的表現在目前及未來的兩三年之間都優於3G的相關技術標準。而藉由系統產品的特性與網路外部性、標準競爭與數位匯流的角度來探討WiMAX與3G可能的市場表現特性與競爭合作關係後也發現，WiMAX相對於3G具有低成本的特性，但3G在安裝基礎、線路普及率、全球工作頻段的一致性上，則有WiMAX未能具備的絕對優勢。因此何者能成為市場上主流的無線行動寬頻接取技術，尚未能有明確的定論。 WiMAX與3G在一開始的關係是合作大於競爭，而隨著WiMAX進入市場的時間越長，兩者之間的關係也由合作慢慢轉為競爭。而主要影響WiMAX與3G競爭關係的關鍵變數有四個：政府對WiMAX發展的態度、快速建立消費者期望的能力及對終端裝置產品發展趨勢的掌握、無線行動寬頻服務需求的成長狀況。WiMAX與3G 何者能確實影響或掌握四項關鍵變數的變化，將能真正成為市場上無線行動寬頻接取技術的主流。 / Among all kinds of broadband wireless access technologies, WiMAX and 3G are the 2 most potential candidates to dominate the future broadband mobile date service marrket. On the one hand, 3G moves into the market earlier and has the advantage of high mobility and popular existed 2G, 2.5G subscribers as bases. However, the content service on 3G doesn’t get prospered due to the complemental terminal devices comprise mostly handheld phones which aren’t capable of performing complicated tasks. On the other hand, WiMAX tries to follow the success of WiFi, and positions as the low cost, high data rate, and metropolitan area mobile solution in the broadband mobile data service. The most possible complemental terminal devices for WiMAX in early stage are notebooks which don’t provide high mobility, and will gradually migrate to handsets with high mobility then. This study tried to figure out the competition and cooperation between WiMAX and 3G when WiMAX as a new comer move into the broadband mobile data service market with 3G already existed in it. This study discussed the possible competition and cooperation between WiMAX and 3G based on the industrial data and related literatures. Professions interviews were also included to supplement with the practical viewpoint of telecom operators. From the technical perspective, WiMAX has better performance and will lead 3G for next 2 to 3 years. From the perspective of systematic product, network externalities, standard competition, and digital convergence, WiMAX surpasses 3G in lower cost, and 3G is superior to WiMAX in larger installed base, potential subscribers and consistent international radio band. As a result, there is no clear conclusion can be made which of WiMAX and 3G can dominate the broadband mobie datea service market in the future. WiMAX will cooperate more than compete with 3G in telecom operators at its early movement into the market. As the time pass by, WiMAX will compete more than cooperate with 3G. The four critical variables to influence the competition between WiMAX and 3G are: the government attitude to WiMAX development, the ability to establish the consumers’ expectation, response to mobile terminal devices trend, and the growth of the wireless mobile broadband demand. Either WiMAX or 3G has the potential to be the mainstream in the wireless mobile broadband market provided that which can influence or respond to the four variables above better.

Este trabalho apresenta uma proposta de sistema para permitir o acesso à informações numa estrutura baseada em sistemas computacionais, visando monitoramento remoto. Desta forma, pessoas responsáveis por um ambiente eletronicamente monitorado poderão coletar informações em um ambiente computacional através de telefonia IP, síntese de voz e integração com a rede de telefonia pública comutada, obter informações passivamente ou ativamente de uma estrutura monitorada. Os recursos sugeridos para esse modelo proposto foram escolhidas conforme sua utilização no mercado, ou facilidade na aplicação prática. Sempre que possível, usando software livre (Open Source), de tal forma que o formato apresentado neste trabalho possa fomentar outros estudos e ser utilizado para soluções mais sofisticadas. É possível, também, haver aplicações relacionadas com a acessibilidade para deficientes visuais. Sistemas proprietários para acesso a informações remotas estão cada vez mais comuns, especialmente em soluções corporativas, porém acesso a informações através de voz não é uma prática comum. Sabendo que a telefonia cada vez se torna mais acessível e comum de ser acessada de qualquer local, é possível coletar informações em um sistema eletrônico, transformando-as em frases parametrizada e posteriormente, reproduzidas por um sistema computacional. Foram realizados ensaios práticos do sistema proposto com os elementos básicos de funcionamento. Os resultados apresentados foram satisfatórios e indicam que aplicações deste modelo podem ser realizadas em diversas estruturas, observando as adequações para cada uma delas. / This work presents a proposed system for accessing information in structure-based computer systems, aiming at remote monitoring. Persons responsible for an electronically monitored environment may collect information in a computer environment and through IP telephony, voice synthesis and integration with the PSTN (Public Switched Telephone Network), obtain information passively or actively from a monitored environment. The resources suggested for this model were chosen according to their use in the market or facility in practice. Whenever possible, using Open Source software, so that the format presented in this work could stimulate further studies and be used for more sophisticated solutions. You can also have applications related to accessibility for the visually impaired people. Proprietary systems for remote access to information are increasingly common, especially in enterprise solutions, but to access information through voice is not a common practice. Knowing that the phone becomes ever more accessible and common to be accessed from anywhere, it is possible to collect information in an electronic system, transforming them into sentences parameterized and subsequently reproduced by a computer system. Tests with the basic elements of operation were performed. The results were satisfactory and indicate that applications of this model can be realized in various structures, observing the adjustments for each one.

This diploma thesis deals with digital nomadism (modern way of teleworking, enabled mainly by the existence of internet and social networks) and implications of this phenomenon for journalistic environment and media functioning. In the Czech environment, this issue has been explored so far, and digital nomadism is rapidly changing in view of the rapid technological development of the media environment on the internet. The author wanted to add this gap to the thesis, both in theory and in primary research. Through interviews with specific digital nomads (especially Czechs and Czechs), she tries to answer basic questions about how the digital nomads actually happened, their motivation, the specifics of their work and, last but not least, whether it is possible as a digital nomad - actually a journalist to feed. The concept of digital nomadism first captures theoretically, both in general, in the context of the technological development of the media environment (new media and formats) and changes in the labor market in the journalistic environment, and specifically in terms of media theory. Specifically, it analyzes digital nomadism in the context of technological convergence and media hybridization. In particular, on the basis of available, mainly foreign literature, the concept and concept of digital...

No / Collaboration in art, design and media has traditionally taken place in the studio. Recent experiments in collaboration and interaction have sought to identify the factors that promote productive and creative collaboration and those that do not. It is clear that virtual collaboration mediated by computer networks can include many of the elements that characterise face to face collaboration. This also facilitates international collaboration just as easily as national and local ones. At the same time, digital convergence is producing environments and artefacts that blur the traditional distinctions between art and technology, and which give rise to new creative opportunities and new kinds of creative works. These are described in this paper and their significance is explored. These also cause further reflections on the contributions that science can make to art and vice-versa.

Orientador: Hilda Carvalho de Oliveira / Banca: João Benedito dos Santos Júnior / Banca: Eraldo Pereira Marinho / Resumo: A crescente adoção de sistemas de e-Learning, tanto no meio acadêmico quanto no meio corporativo, vem gerando várias linhas de pesquisas e trabalhos em educação a distância. A criação de conteúdos tem recebido especial atenção, associada a padrões com metadados, que enfatizam a reutilização de objetos de aprendizagem (OAs) e a interoperabilidade entre os sistemas de e-Learning. A realidade da TV Digital Interativa no Brasil pode ser considerada como um meio alternativo eficaz e de baixo custo para levar informações às comunidades mais remotas, favorecendo a inclusão digital. A TV Digital oferece novos paradigmas de usabilidade. Nesta direção, este trabalho teve como principal objetivo investigar a viabilidade de implementação, no ambiente da TVDI, das funcionalidades dos ambientes virtuais colaborativos de aprendizagem já implementados para a Web. O sistema Moodle foi selecionado, por ser mundialmente utilizado, com arquitetura em conformidade com o modelo IEEE LTSA (Learning Technology System Architecture) e mecanismos de suporte ao padrão de OAs SCORM. Foram realizadas análises sobre os módulos do Moodle, convergindo o módulo de QUIZ para o ambiente da TVD aberta brasileira. Foram utilizados o emulador XletView e a API Java TV. / Abstract: The growing adoption of e-Learning systems, both in academia and in corporative areas, is generating many lines of research and works in education. The creation of Learning contents with metadata standards has received special attention. They enhance the reutilizability of Learning Objects (LOs) and the interoperabilility between e-Learning systems. The reality of the Interactive Digital TV (IDTV) in Brazil can be considered as an effective alternative way and of low cost to take information to many remote communities, fostering digital inclusion. The Digital TV offers new paradigms of usability. In this direction, the main goal of this work was investigate the viability of converge the functionalities of Web collaborative virtual environments of learning for the environment of the IDTV. The Moodle system was selected, because it comes world-wide being used, with architecture in according to the model IEEE LTSA (Learning Technology System Architecture) and has mechanisms of support to the standard of LOs SCORM. Analyses on the modules of the Moodle were done. The QUIZ module was converged to the environment of the Brazilian open digital TV. The XletView emulator and the Java TV API were used. / Mestre

A indústria de TVa cabo está num caminho convergente com o setor de telecomunicações por força dos avanços tecnológicos relacionados à informática. As redes das operadoras de cabo têm a possibilidade de se transformarem num elemento central na evolução da sociedade da informação. Essa dissertação investiga a estrutura competitiva atual da indústria de TV a cabo brasileira. Para isso, lança mão dos conceitos de Michael E. Porter (1980). Além disso, são descritos possíveis desdobramentos na evolução da estrutura do setor, na visão de especialistas da indústria. / The Cable Industry and the Telecommunications Industry are converging due to technological innovation mainly related to computer sciences. Cable networks have the potential to become a central element on the information society evolution. This paper investigates the Brazilian cable industry's current competitive structure. To do so, Michael E. Porter (1980) concepts are used. This paper also describes possible outcomes for structural evolution of the sector.

A indústria de TVa cabo está num caminho convergente com o setor de telecomunicações por força dos avanços tecnológicos relacionados à informática. As redes das operadoras de cabo têm a possibilidade de se transformarem num elemento central na evolução da sociedade da informação. Essa dissertação investiga a estrutura competitiva atual da indústria de TV a cabo brasileira. Para isso, lança mão dos conceitos de Michael E. Porter (1980). Além disso, são descritos possíveis desdobramentos na evolução da estrutura do setor, na visão de especialistas da indústria. / The Cable Industry and the Telecommunications Industry are converging due to technological innovation mainly related to computer sciences. Cable networks have the potential to become a central element on the information society evolution. This paper investigates the Brazilian cable industry's current competitive structure. To do so, Michael E. Porter (1980) concepts are used. This paper also describes possible outcomes for structural evolution of the sector.

A indústria de TVa cabo está num caminho convergente com o setor de telecomunicações por força dos avanços tecnológicos relacionados à informática. As redes das operadoras de cabo têm a possibilidade de se transformarem num elemento central na evolução da sociedade da informação. Essa dissertação investiga a estrutura competitiva atual da indústria de TV a cabo brasileira. Para isso, lança mão dos conceitos de Michael E. Porter (1980). Além disso, são descritos possíveis desdobramentos na evolução da estrutura do setor, na visão de especialistas da indústria. / The Cable Industry and the Telecommunications Industry are converging due to technological innovation mainly related to computer sciences. Cable networks have the potential to become a central element on the information society evolution. This paper investigates the Brazilian cable industry's current competitive structure. To do so, Michael E. Porter (1980) concepts are used. This paper also describes possible outcomes for structural evolution of the sector.

近年來科技匯流發展日行千里，新興無線寬頻的接取技術（Broadband Wireless Access）不斷升級，為民眾的生活帶來更便利的創新應用，而寬頻接取服務的亦由以往一種技術提供一種服務的方式，逐漸轉換為涵蓋數據（Data）、語音（Voice）及影音內容（Video）等三種服務的匯流。加速了電信、廣電與網路通訊產業升級的需求，也帶來了新的市場動能與發展契機。 本研究以台灣為研究範本，以個案研究方法來探討在網路為基礎的數位匯流環境下數位生活之發展趨勢、個案公司科技產品未來的發展趨勢及因應策略。 而本研究發現未來家用閘道器產品市場，將會朝向整合家中所有可上網設備的整合性產品特性發展。亦將會是國內網通設備商值得切入的新領域。娛樂型家用閘道器，目前市場上多以機上盒(Set top box, STB)加上Router的功能型態出現，惟必須等待STB零售市場打開後，國內的廠商將會有機會創造更大利潤空間。而個案公司在研發方向應以Cable Docsis的核心技術為中心,從水平方向擴展至家庭網路的Home applications。追求更快的速度,更多元化的網路技術和更方便的寬頻服務。在縱向方面,我們則以完整的解決方案為主軸,往頭端CMTS技術和網管為發展重點。

Orientador: Hilda Carvalho de Oliveira / Banca: Eugenio Maria de França Ramos / Banca: Klaus Schlünzen Junior / Resumo: A construção de Objetos de Aprendizagem (OAs) é um importante processo de Educação a Distância. Padrões têm sido definidos com estruturas de metadados para favorecer a reutilização e portabilidade dos OAs, como SCORM, LOM, ARIADNE, entre outros. Mesmo assim, a portabilidade entre diferentes sistemas de e-Learning requerem conhecimentos específicos. A dificuldade aumenta quando se direciona a diferentes meios digitais e de comunicação, como ambientes da Web e da TV Digital Aberta (TVDA) - um meio alternativo de acesso à Educação que vem sendo integrado à vida dos brasileiros. Nesse contexto, o principal objetivo deste trabalho foi a investigação de um novo modelo, OAX, para implementação de OAs com portabilidade para ambientes Web e para a TVDA. O modelo, baseado em metadados e codificação Base64, foi definido com base na estrutura SCORM. Para a criação e gerenciamento dos OAs, segundo o modelo OAX, foi proposta a arquitetura de um sistema de autoria, SOAX - uma aplicação Web, composta por quatro componentes, visando: encapsulamento do átomo de conteúdo OAX, armazenamento do conteúdo, aplicativos de gerenciamento/visualização de conteúdo e APIs (Application Programming Interface) de importação e exportação para padrões de OAs. O sistema SOAX foi projetado com a finalidade de atender educadores com conhecimentos básicos de Informática, de forma que pudessem construir os OAs preocupados apenas com os aspectos didático-pedagógicos. O sistema converte automaticamente os OAs para os formatos de padrões de OAs e para ambientes da TVDA. Está disponível uma versão beta do SOAX. / Abstract: The construction of Learning Objects (LOs) is an important process for distance education. Standards have been defined with metadata structures to enhance the reutilizability and portability of LOs, such as SCORM, LOM, ARIADNE, among others. The portability between different systems of e-Learning requires expert knowledge. The difficulty increases when different digital media and communication environments are used, for example: Web and Open Digital TV (ODTV) - an alternative means of access to education that is being integrated into daily life of Brazilians. In this context, the main goal of this work was to investigate a new model for implementation of LOs (OAX) with portability to Web and ODTV environments. The model was defined based on the SCORM standard and was based on metadata and base64 encoding. The architecture of an authoring system (SOAX) was proposed for the creation and management of LOs, according to the OAX model. SOAX is a Web application and is composed of four components for: encapsulation of the OAX content atom, content storage, applications of viewing/management of content and APIs (Application Programming Interface) for import and export LOs for standards formats. The SOAX system was designed for educators with basic knowledge of computer. So they could concentrate efforts on didactic-pedagogic aspects of the LOs. The system automatically converts the LOs for the formats of the LOs standards and ODTV environments. A beta version of SOAX is available. / Mestre