Made available in DSpace on 2015-03-05T14:01:21Z (GMT). No. of bitstreams: 0 Previous issue date: 27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / A evolução constante da tecnologia computacional e das redes sem fio tem tornado os dispositivos móveis cada vez menores e mais poderosos, provendo serviços em qualquer lugar e a qualquer momento. Neste contexto, áreas de pesquisa como as de educação, medicina, jogos e entretenimentos, automobilístico e atualmente o comércio têm experimentado forte crescimento com a adoção destas novas tecnologias. Esta dissertação propõe um modelo de comércio ubíquo chamado MUCS, que utiliza computação ubíqua para a geração de oportunidades de negócio aos usuários nos papeis de clientes e/ou fornecedores. Também são descritos nesta dissertação diversos cenários do cotidiano onde o modelo MUCS pode ser aplicado, e o protótipo que foi implementado para validá-los. Por fim, são apresentados os resultados obtidos em experimentos práticos, com a participação de usuários, cujos principais objetivos foram o de validar os cenários apresentados, e avaliar a aceitação do modelo proposto. / The constant evolution of computing technology and wireless networks have made the wireless devices smaller and more powerful, providing services anywhere at any time. In this context, research areas such as education, medicine, games and entertainment, automakers and businesses have been experiencing high growth with the adoption of new technologies. This essay proposes a ubiquitous commercial model called MUCS, which utilizes ubiquitous computing to generate business opportunities to users, being them customers and/or providers. It also describes several everyday scenarios where the MUCS model can be applied, and the prototype which has been implemented to validate them. Finally, the results obtained are presented through a practical experiment, with the participation of users whose main objectives were to validate the presented scenarios, and evaluate the acceptance of the proposed model.

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No. of bitstreams: 1 33.pdf: 1765508 bytes, checksum: d921fbdef8015531446e414c52c66bf9 (MD5) Previous issue date: 2012 / Nenhuma / Este trabalho elabora de uma arquitetura de software que contempla dentro de dispositivos móveis na plataforma Android, a coleta de informações de contexto físico de localização (informações que são apenas coletadas em ambientes externos) e geração de contexto lógico de localização (informações que precisam de um processamento dos dados para ser encontradas em ambientes internos), estas informações são armazenadas em uma estrutura Web Semântica a qual sofrerá inferências para gerar mais um contexto lógico de recomendação de uso de recursos disponíveis no dispositivo móvel e anteriormente utilizados pelo usuário em um dado instante e local. A funcionalidade desta arquitetura será verificada com a construção de um protótipo na plataforma Android. Um dos desafios deste trabalho será coletar o contexto lógico de localização do dispositivo em locais internos, como prédios e casas, onde a intensidade do sinal do sistema de posicionamento global (GPS) é insuficiente para ser identificada, portanto neste trabalho será utilizado sensores acelerômetro e giroscópio presentes nos dispositivos móveis para calcular seu deslocamento. A localização interna será integrada a localização externa, formando um percurso contínuo. As informações coletadas no contexto físico são armazenadas em uma ontologia dentro do dispositivo móvel e sincronizadas com um servidor remoto. Outro desafio deste trabalho é o desenvolvimento de um agente de software que através dos dados armazenados na ontologia local, faz inferências nos dados armazenados na forma de Web Semântica e disponibiliza recomendações de uso de um determinado recurso, fundamentado apenas nos dados históricos de utilização destes recursos, relacionando a aproximação em determinado local com a frequência no tempo em relação ao mesmo horário do dia ou ao mesmo dia da semana e ao mesmo dia do mês. O armazenamento do contexto coletado, em uma estrutura Web Semântica, possibilita a união destas informações com demais informações coletadas de outros dispositivos contendo contextos que caracterizem um equipamento, um indivíduo ou uma sociedade. O resultado esperado da arquitetura apresentada neste trabalho, será o maior grau possível de precisão na posição geográfica identificada e a coerência das recomendações de uso de recursos disponíveis no dispositivo móvel em um dado instante e local. / This paper elaborates a software architecture that addresses within mobile devices on the Android platform, collecting information from the physical context of location (only information that is collected outdoors) and generation of logical context of location (information they need processing of the data to be found indoors) and stores this information in a Semantic Web structure which suffer inferences to generate a context logical of recommendation to use resources available on the mobile device and used previously by the user at a given time and local. The functionality of this architecture will be test by construction a prototype on the Android platform. One of the challenges of this work will be to collect the context of logical device location in indoor locations such as buildings and houses where the signal strength of the Global Positioning System (GPS) is insufficient to be identified, so this work will be used and accelerometer sensors gyroscope present in mobile devices to calculate your speed and direction. The location will be integrated inside the external location, forming a continuous path. The information collected in the physical context is stored in the ontology within the mobile device and synchronized with a remote server. Another challenge of this work is the development of a software agent that through data stored in the ontology on device, makes inferences on the data stored in the form of Web Semantic and provides recommendations for use of a given resource, based only on historical data of these resources by relating the approach in a certain place with the frequency in time over the same time of day or the same day of the week and the same day of the month. The architecture of this work is being called and Context Manager is integrated with the other two studies did not present this work: a Semantic Desktop with the task of identifying a resource that is being used to send and manager context; and Context's Federation, serving as a remote server, with the task of receiving context data collected by the context manager. The storage of context collected in a Web Semantic structure enables the union of this information with other context information that characterize a device, an individual or a society. The expected outcome of the architecture presented here will be the greatest possible degree of accuracy in the identified geographical position and consistency of recommendations for the use of resources available on the mobile device at a given time and place.

[ES] Esta tesis doctoral tiene como reto la mejora de precisión de un sistema de localización en interiores cuya aplicación principal es el entorno hospitalario. Se apuesta por una novedosa técnica importada recientemente a la tecnología y especificación Bluetooth denominada AoA, con la que se pretende cubrir todos los casos de uso a los que tecnologías existentes no pueden abordar debido a su limitación en la precisión. Gracias a la combinación de esta nueva técnica de posicionamiento junto con sus predecesoras, la solución puede llegar a cubrir otros escenarios de manera precisa y eficiente como la ubicación a nivel de cama, sillón o consulta, gracias al trabajo realizado en el marco de esta tesis, donde se ha mejorado la plataforma de localización de manera holística en los distintos elementos que la componen, buscando una relación coste-efectividad óptima: electrónica, radiofrecuencia y telemática. / [CA] Aquesta tesi doctoral té com a repte la millora de precisió d'un sistema de localització en interiors l'aplicació principal dels quals és l'entorn hospitalari. S'aposta per una nova tècnica importada recentment a la tecnologia i especificació Bluetooth denominada AoA, amb la qual es pretén cobrir tots els casos d'ús als quals tecnologies existents no poden abordar a causa de la seua limitació en la precisió. Gràcies a la combinació d'aquesta nova tècnica de posicionament juntament amb les seues predecessores, la solució pot arribar a cobrir altres escenaris de manera precisa i eficient com la ubicació a nivell de llit, butaca o consulta, gràcies al treball realitzat en el marc d'aquesta tesi, on s'ha millorat la plataforma de localització de manera holística en els diferents elements que la componen, buscant una relació cost-efectivitat òptima: electrònica, radiofreqüència i telemàtica. / [EN] The challenge of this doctoral thesis is to improve the precision of an indoor location system whose main application is the hospital environment. Work has been done on a new technique recently imported into Bluetooth technology and specification called AoA, which is intended to cover all use cases that existing technologies cannot solve due to their limitation in precision. Thanks to the combination of this new positioning technique together with its predecessors, the solution can cover other scenarios with precision and efficiency such as location at the bed, chair or box, thanks to the work carried out within the framework of this thesis, where the location platform has been improved holistically in the different elements that make it up, looking for an optimal cost-effectiveness relationship: electronics, radio frequency and telematics. / Casanova Murillo, M. (2024). Sistemas de localización en interiores en banda UHF [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/207553

Indiana University-Purdue University Indianapolis (IUPUI) / Pedestrian and vehicle interaction analysis in a naturalistic driving environment can provide useful information for designing vehicle-pedestrian crash warning/mitigation systems. Many researchers have used crash data to understand and study pedestrian behaviors and interactions between vehicles and pedestrian during crash. However, crash data may not provide detailed pedestrian-vehicle interaction information for us. In this thesis, we designed an automatic pedestrian tracking and status analysis method to process and study pedestrian and vehicle interactions. The proposed pedestrian tracking and status analysis method includes pedestrian detection, pedestrian tracking and pedestrian status analysis modules. The main contributions of this thesis are: we designed a new pedestrian tracking method by learning the pedestrian appearance and also their motion pattern. We designed a pedestrian status estimation method by using our tracking results and thus helped estimate the possibility of collision. Our preliminary experiment results using naturalistic driving data showed promising results.

Text in English / In this study, the research problem sought to explore, identify and acknowledge the value of vehicle tracking technology within the South African Police Service (SAPS). National legislation in the Republic of South Africa allows the SAPS and private organisations, such as Tracker, to create partnerships to successfully combat crime, such as vehicle related crimes. Data was collected by means of a literature study, together with semi-structured interviews that were individually conducted with non-commissioned officers of the SAPS: West Rand Flying Squad. These members are deployed daily, in an operational environment, to deal with the recovery of stolen and robbed motor vehicles; they utilise vehicle tracking technology to fulfil this function. A detailed study of literature relating to national legislation, SAPS directives, media and newspaper reports as well as library resources and international studies was conducted. The research indicates the importance of vehicle tracking technology in assisting specialized units within the SAPS to successfully and efficiently track and locate stolen or robbed motor vehicles. It is evident that the use of this type of technology has become an invaluable tool to the SAPS: West Rand Flying Squad members in their daily duties. Furthermore, members at grassroots level understand and appreciate the assistance and value of technology, especially as the technology enables them to effectively recover stolen or robbed motor vehicles, and to successfully arrest the perpetrators responsible for these thefts. The recommendations made in this study may provide a number of solutions to the South African government, SAPS, insurance industry and the general public, regarding the value of vehicle tracking technology. In addition, the study indicates how this technology can effectively assist in curbing vehicle crimes and the recovery of stolen or robbed motor vehicles; in the process, recovery affects the arrests of criminals, thus saving the economy a significant amount of money due to crimes of this nature. / Police Practice / M.A. (Criminal Justice)