Diss. (sammanfattning) Stockholm : Karol. inst., 2004. / Härtill 4 uppsatser.

This report presents an investigation of the possibilities to implement voice over IP (VoIP) in Sony Ericsson cellular phones. The results from this investigation show that it is partially possible to implement such a solution. The best option for doing so is to make use of the support for the Session Initiation Protocol and the Real-time Transport Protocol offered by the architecture. Another goal is to evaluate if Bluetooth is able to handle the requirements needed for the solution. The whole concept is proven by implementing a prototype. Measurements on this prototype show that Bluetooth will be able to handle the requirements of most IP-based voice communication, i.e., in respect to latency and bandwidth.

The aim of this thesis is to propose a new mobile service. At the beginning of this work are listed technologies, which are used in mobile communications. Furthermore, it defines the concept of mobile service, indicating a few examples. The practical part describes a custom design services and its variants. The new service is finally described as a possible new type of business.

[pt] Atualmente um dos setores industriais que mais se desenvolve é a indústria eletroeletrônica. À medida que tecnologias evoluem, barateando os produtos, o consumo de eletroeletrônicos aumenta. O tempo de vida útil de tais produtos é relativamente curto e, em pouco tempo, esse material torna-se resíduo, conhecido como sucata eletrônica. Um tipo de sucata eletrônica comum é o telefone celular. Esta sucata representa uma matéria-prima interessante, pois, contém grande quantidade de metais base, quantidade considerável de metais valiosos e contendo também elementos perigosos. Neste trabalho, as sucatas passaram por várias etapas de processamento mecânico: inicialmente os aparelhos foram separados em lotes (menor 2001; maior 2002) e desmontados manualmente. As placas de circuito impresso foram moídas abaixo de 1 mm, Em seguida, as separações por densidade e magnética foram realizadas. As frações obtidas ao longo do processamento mecânico foram caraterizadas por análises químicas. Realizouse um estudo em caráter preliminar para recuperar prata utilizando processamento hidrometalúrgico. O material concentrado mecanicamente foi lixiviado com ácido nítrico. Em seguida a prata foi recuperada da solução lixiviada por cementação. Com o processamento mecânico foi possível obter frações metálicas de até 80 por cento em peso. A cementação da prata pelo cobre mostrou-se viável, possibilitando obter prata metálica em forma de precipitado e um lixiviado concentrado de cobre. Um ensaio de lixiviação foi realizado com a finalidade de caracterizar o resíduo quanto à sua periculosidade, de modo que, as sucatas de telefone celular devem ser consideradas resíduo perigoso, pois, a concentração de chumbo foi superior ao limite estabelecido pelas normas brasileiras. / [en] Nowadays the electronics industry is the leading sector in developing new technologies. These new technologies lead to cheaper products increasing the consumption. The lifetime of such products is relatively short and soon it becomes waste, known as electronic waste. Cell phone is a common electronic waste. This waste represents an interesting raw material, because it contains large amount of base metals, considerable amount of valuable metals and also those dangerous. In this work, the electronic waste was submitted to mechanical processing: initially the devices were separated into two categories (less 2001,more 2002) and disassembled manually. The printed circuit boards were milled below 1 mm and then submitted to density and magnetic separation processes. The fractions obtained during the mechanical processing were characterized by chemical analysis. Using the mechanical processing was possible to obtain metal fractions of 80 wt per cent. A preliminary study to recover silver using hydrometallurgical processes was carried out. The concentrated material mechanically obtained was leached with nitric acid. Then the silver was recovered from the leached solution by cementation process. The silver cementation with copper was feasible; the precipitate was rich in silver and leachate in copper. A leaching test was carried out to determine if a waste needs to be managed as a hazardous; so that, cell phone waste must be considered hazardous residue because the lead concentration was above the limit established by Brazilian Standards.

This thesis concentrates on the UMTS cellular network and the possibilities of its monitoring. There are several methods of monitoring the UMTS. The technique used in this project is based on monitoring through a cellular terminal. The theoretical part is devoted to the description of the UMTS system and the WCDMA technique. The practical part then deals with the method of UMTS monitoring through a cellular terminal and describes in detail individual screens of the FTD (Field Test Display) program, the Netmonitor functions and their parameters. The next part of this thesis analyses the RRC messages, which were recorded during the realization of services (video calls, calls, data transfers) in the UMTS network. The last chapters of the thesis are briefly dealing with software and hardware servicing of cellular terminals. The attachment then offers two lab tasks, in which the students get acquainted with the UMTS network structure and the behaviour of the cellular terminal in this network.

The main target of this work is to design and to implement unfailable safety appliance for motocycles with use any GSM technology. In my masters’s thesis I applied to individaul fields which I had to knows for realization of this work. The introductory chapter tells the reader about evaluation of former semestral projects and about brief description of the realized mechanism. It is followed by descripctoin of principles of communication between PC and mobile phone. The main part of my work is dedicated to application itself. The applicaton is called motoalarm. The last chapter creates description service of localisation mobil phones which is called Kde je... The conclusion includes evaluation of this master´s project and general description of the realized mechanism.

No description available.

[pt] As revoluções tecnológicas resultaram em grandes transformações no mundo e influenciaram na subjetividade de todos. Esta dissertação busca ouvir profissionais do mercado de trabalho, para entender como estão, no início do século XXI, a vida e o trabalho após a chegada dos celulares. Para tanto, foram entrevistados profissionais com filhos, que possuem telefones celulares concedidos e com contas pagas por suas empresas situadas no Rio de Janeiro. A análise das respostas indica a queda de fronteiras entre o mundo pessoal e profissional. O trabalho entra no cotidiano da família, através do celular, assim como a família consegue penetrar no ambiente de trabalho a qualquer hora. A vida dos participantes da pesquisa passou a ter um ritmo mais acelerado, com agilidade e flexibilidade, já que podem trabalhar ou fazer contato com suas casas e familiares a qualquer hora e em qualquer lugar. Entretanto, esse trabalhador contemporâneo que é contatado facilmente pelo celular, percebe a necessidade de que estejam disponíveis em tempo integral e com respostas rápidas para as demandas constantes do seu dia-a-dia. O celular tornou- se uma ferramenta de trabalho, assim como o computador e o e-mail, e os entrevistados desta pesquisa não conseguem se perceber executando suas atividades sem eles. Na análise das entrevistas pode-se verificar ainda o surgimento de novos hábitos, a partir da utilização constante do celular, tais como a administração da casa e da família à distância e a possibilidade de trabalhar remotamente. / [en] Technological revolutions have brought about dramatic changes in the world and in the ways people live, think, behave and feel. The purpose of the present study is to understand how the arrival of cell phones has affected the ways employees in the contemporary labor market live their private and professional lives. For this purpose, professionals who have children and whose cell phone accounts are paid for by their companies were interviewed. All of them lived and worked in Rio de Janeiro. Their answers showed that there is no frontier between their professional and private lives; cell phone use makes their working and professional lives mingle. In addition, the results revealed that the lives of those who took part in the present study have become more agile due to the fact they can both work and contact their homes and family at any time, no matter where they are. However, these professionals, who can also be easily reached by means of their cell phones, feel that they have to be available to their employers all the time in order to quickly solve their daily demands by phone. The cell phone, in the same way as the computer and the e-mail, has become a working tool. The interviewees admitted they could not imagine their daily lives without those tools. The interviews also showed that new habits have been created as a result of the constant use of those tools. Among these new habits are the administration of home and family from any distance and the possibility of work remotely.

Thesis (M.A. (Translation Studies and Linguistics)) -- University of Limpopo, 2014 / Refer document

[pt] Rendering Baseado em Imagens (IBR - Image-Based Rendering) é um a tendência forte em visualização devido à alta qualidade da imagem. Um dos problemas mais complexos é a composição de objetos (3D ou não) na imagem do panorama. O uso de IBR em plataformas restritas, como os celulares, encontra inúmeras dificuldades e não conta com muitos trabalhos na literatura. Este trabalho analisa as possibilidades de implementação de IBR com objetos ativos em celulares. Um protótipo é proposto e resultados são comentados. / [en] Image Based Rendering (IBR) is a strong tendence in visualization due to the high quality of the images. One of the most complex problems is the 2D/3D object composition in a panorama. The use of IBR in limited platforms, like cell phones, faces a number of problems and the literature is scarse. This work analizes the possibility of implementing IBR with active objects in cell phones. A prototype is presented and results are analyzed.