2D position system for a mobile robot in unstructured environments

Nowadays, several sensors and mechanisms are available to estimate a mobile robot trajectory and location with respect to its surroundings. Usually absolute positioning mechanisms are the most accurate, but they also are the most expensive ones, and require pre installed equipment in the environment. Therefore, a system capable of measuring its motion and location within the environment (relative positioning) has been a research goal since the beginning of autonomous vehicles. With the increasing of the computational performance, computer vision has become faster and, therefore, became possible to incorporate it in a mobile robot. In visual odometry feature based approaches, the model estimation requires absence of feature association outliers for an accurate motion. Outliers rejection is a delicate process considering there is always a trade-off between speed and reliability of the system. This dissertation proposes an indoor 2D position system using Visual Odometry. The mobile robot has a camera pointed to the ceiling, for image analysis. As requirements, the ceiling and the oor (where the robot moves) must be planes. In the literature, RANSAC is a widely used method for outlier rejection. However, it might be slow in critical circumstances. Therefore, it is proposed a new algorithm that accelerates RANSAC, maintaining its reliability. The algorithm, called FMBF, consists on comparing image texture patterns between pictures, preserving the most similar ones. There are several types of comparisons, with different computational cost and reliability. FMBF manages those comparisons in order to optimize the trade-off between speed and reliability.

Content Marketing: O Poder dos Conteúdos no Marketing Relacional – Estudo Aplicado ao Mercado de Bricolage

A presente investigação pretende demonstrar o poder dos conteúdos no processo de construção de relações entre marcas e consumidores. Se por um lado visa compreender de que forma é que a comunicação integrada de conteúdos – Content Marketing – pode ser uma ferramenta essencial para a empresa ganhar notoriedade, posicionamento e consequentemente receitas, por outro propõese analisar o papel do Content Marketing como uma das dimensões do Marketing Relacional. O estudo foca-se no mercado de bricolage, direccionado para a marca Leroy Merlin. Foi utilizado o método quantitativo através de inquéritos por questionário a uma amostra de 80 consumidores de bricolage em Portugal. Os resultados permitem concluir que no mercado estudado a qualidade intangível é a variável do marketing relacional com impacto na satisfação de clientes, sendo que para efeitos de fidelização, as variáveis significativas são: o compromisso, os factores do meio-envolvente e a notoriedade. O marketing de conteúdos revelou-se pouco significativo para a obtenção de satisfação e fidelização de clientes, no entanto apresentou um impacto indirecto através da notoriedade que depois terá relação com a satisfação e com a fidelização.

Combining WLAN fingerprint-based localization with sensor data for indoor navigation using mobile devices

This project proposes an approach for supporting Indoor Navigation Systems using Pedestrian Dead Reckoning-based methods and by analyzing motion sensor data available in most modern smartphones. Processes suggested in this investigation are able to calculate the distance traveled by a user while he or she is walking. WLAN fingerprint- based navigation systems benefit from the processes followed in this research and results achieved to reduce its workload and improve its positioning estimations.

O papel das Redes Sociais como ferramenta de Marketing: Um estudo das empresas B2B nacionais

O objetivo deste estudo é explorar o impacto e benefícios das redes sociais no setor business-to-business (B2B) – um fenómeno recente e que, por isso, constituiu uma área ainda pouco explorada em termos académicos, particularmente em Portugal. Com base num inquérito realizado a 100 empresas portuguesas a operar em contexto B2B, este estudo demonstra claramente que os benefícios das redes sociais não são exclusivos das empresas business-to-consumer (B2C), contrariando assim a convicção que a aposta nestas plataformas constitui um desperdício para os mercados B2B. As empresas foram aliás unânimes em reconhecer a importância das redes sociais, contudo, nem todas parecem beneficiar ao máximo destas plataformas. Concluiu-se que, mais do que a área ou setor de atuação, fatores como o planeamento e compromisso determinam os resultados obtidos nas redes sociais. Evidência disso mesmo é o facto de 70% das empresas que atualizam o perfil do Facebook diariamente afirmarem já ter conseguido novas oportunidades de negócio com base em contactos feitos através das redes sociais, sendo que esta percentagem diminui consideravelmente (37%) quando se consideram as restantes empresas, com atualização menos frequente. Contudo, fica claro também que as empresas B2B portuguesas parecem não utilizar as redes sociais como veículo primordial para alcançar novas oportunidades de negócio, mas sim para desenvolver a notoriedade e imagem da marca, bem como aumentar o envolvimento e as experiências positivas com os clientes e potenciais clientes. Este estudo revela assim que, em contexto B2B, as empresas portuguesas encontram-se ativamente a fazer negócios através das redes sociais, embora exista ainda margem para se desenvolverem e tirarem ainda mais partido destas plataformas.

The consumption of media contents through mobile devices in Finland

O campo dos media na Finlândia encontra-se num processo de mudanças aparentemente imparáveis, com os dispositivos móveis, tal como os smartphones e tablets, a influenciarem cada vez mais os padrões de produção e consumo de media. Nesta dissertação é defendido que esta situação é influenciada por factores históricos, sociais e culturais: desde os livros e jornais como meio de manter a língua finlandesa até aos benefícios da Segurança Social que permitiram que até as pessoas com menos rendimentos comprassem o jornal para se manterem a par dos desenvolvimentos do país, bem como a grande tradição de leitura que é associada aos finlandeses, assim como as condições que ao longo da história fazem fizeram com que os finlandeses sejam fascinados pelas novas tecnologias. Adicionalmente, presto especial atenção às estratégias que são adoptadas pelas cada vez mais convergentes companhias de media para enfrentarem a competição de elementos como os social media.

Teleoperation of a service robot using a mobile device

Teleoperation is a concept born with the rapid evolution of technology, with an intuitive meaning "operate at a distance." The first teleoperation system was created in the mid 1950s, which were handled chemicals. Remote controlled systems are present nowadays in various types of applications. This dissertation presents the development of a mobile application to perform the teleoperation of a mobile service robot. The application integrates a distributed surveillance (the result of a research project QREN) and led to the development of a communication interface between the robot (the result of another QREN project) and the vigilance system. It was necessary to specify a communication protocol between the two systems, which was implemented over a communication framework 0MQ (Zero Message Queue). For the testing, three prototype applications were developed before to perform the test on the robot.

Mobile payment

Este estudo visa perceber quais os principais determinantes da adopção e recomendação da tecnologia de pagamentos móveis. Para atingir este objectivo, foi desenvolvido um modelo de pesquisa que combinou os modelos de adopção unified theory of acceptance and use of technology 2 (UTAUT2) e diffusions on innovations (DOI), juntamente com a variável perceived technology security (PTS). Foi realizado um questionário online, tendo sido obtidas 301 respostas válidas. Os dados recolhidos foram analisados utilizando a técnica de structured equation modeling (SEM), de forma a testar empiricamente o modelo e pesquisa. As principais conclusões retiradas são que os principais factores, com efeitos directos e indirectos, para a adopção e recomendação da tecnologia de pagamentos móveis são compatibility, perceived technology security, performance expectations, innovativeness e social influence. As conclusões deste estudo fornecem informações úteis às partes interessadas na tecnologia de pagamentos móveis.

Integration of a mobile autonomous robot in a surveillance multi-agent system

This dissertation aims to guarantee the integration of a mobile autonomous robot equipped with many sensors in a multi-agent distributed and georeferenced surveillance system. The integration of a mobile autonomous robot in this system leads to new features that will be available to clients of surveillance system may use. These features may be of two types: using the robot as an agent that will act in the environment or by using the robot as a mobile set of sensors. As an agent in the system, the robot can move to certain locations when alerts are received, in order to acknowledge the underlying events or take to action in order to assist in resolving this event. As a sensor platform in the system, it is possible to access information that is read from the sensors of the robot and access complementary measurements to the ones taken by other sensors in the multi-agent system. To integrate this mobile robot in an effective way it is necessary to extend the current multi-agent system architecture to make the connection between the two systems and to integrate the functionalities provided by the robot into the multi-agent system.

Mobile image processing to support educational geometry games

The mobile IT era is here, it is still growing and expanding at a steady rate and, most of all, it is entertaining. Mobile devices are used for entertainment, whether social through the so-called social networks, or private through web browsing, video watching or gaming. Youngsters make heavy use of these devices, and even small children show impressive adaptability and skill. However not much attention is directed towards education, especially in the case of young children. Too much time is usually spent in games which only purpose is to keep children entertained, time that could be put to better use such as developing elementary geometric notions. Taking advantage of this pocket computer scenario, it is proposed an application geared towards small children in the 6 – 9 age group that allows them to consolidate knowledge regarding geometric shapes, forming a stepping stone that leads to some fundamental mathematical knowledge to be exercised later on. To achieve this goal, the application will detect simple geometric shapes like squares, circles and triangles using the device’s camera. The novelty of this application will be a core real-time detection system designed and developed from the ground up for mobile devices, taking into account their characteristic limitations such as reduced processing power, memory and battery. User feedback was be gathered, aggregated and studied to assess the educational factor of the application.

Marketing plan: How to benefit from the European population ageing and attract the affluent senior segment to choose Lisbon as a tourism destination?

NSBE - UNL

FPC current marketing strategy

Direct Research Internship Course

Internationalization of UniPlaces to the Spanish market: Internationalization plan to Madrid, Spain

Field Lab in Entrepreneurial Innovative Ventures

A marketing plan for an enter into a healthy category: The launch of Lactalis Nestlé bifidus yogurt

Marketing Directed Research

Toyota RAV4 model year marketing plan for the U.K

NSBE - UNL

Numerical modelling of compound channel flow

Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BD/64337/2009 ; projects PTDC/ECM/70652/2006, PTDC/ECM/117660/2010 and RECI/ECM-HID/0371/2012