Development of a virtual personal video recorder based on a set top box

Estágio realizado na Fraunhofer Portugal ResearchTese de mestrado integrado. Engenharia Electrotécnica e de Computadores (Major Telecomunicações). Faculdade de Engenharia. Universidade do Porto. 200

Proposing Information Communication Technology Solutions for a Business Studio Environment

The Studio at Copenhagen Business School is one of the first classrooms to combine studio learning and business education, with the goal of teaching a set of non-traditional skills to address today’s business needs. The Studio has operated for two years with minimal classroom technology. This project proposed Information Communication Technologies (ICTs) to enhance and expand the activities of the Studio. Our team learned about the Studio’s needs through interviews and observations, identified opportunities for improvement, researched technologies that supplement the activities in the Studio, and determined technological solutions that benefit the Studio. This work resulted in a proposal of 21 ICTs and 12 opportunities for improvement that will aid our sponsor as the Studio develops

IoT Application Provisioning Service

Constant development of software requires updating our Internet of Things (IoT) devices regularly. Some services such as transportation, health care, surveillance and electronic payments require high availability, even during a software update. IoT updates in urban scenarios require connectivity based on the Internet Protocol (IP) and long range connection with adequate speed. Normally, these requirements are provided by cellular network (i.e., using a SIM card) to connect to the Internet. This option presents several disadvantages: it is very expensive and it exposes IoT devices to security threats due to the permanent connection to the Internet. These challenges could be addressed by leveraging long-range broadcast communication (e.g., FM broadcast). IoT devices periodically listen for and receive updates through such a communication infrastructure, without actually being connected to the Internet. This thesis presents a system to provide software updates for IoT devices through long-range broadcast communication technologies. A prototype has been developed based on the concept of “seamless updates”. This allows performing software updates in the background, hence ensuring the availability of a device during the installation time of an update. This seamless update process was implemented on an embedded device (i.e., a Raspberry Pi 3) with a Linux-based operating system. Furthermore, a web-based backend has been implemented. Such a backend allows IoT developers to upload their updates targeting a specific class of devices and schedule when the update will be sent. The security goals of integrity and authentication are accomplished by signing the updates in the backend and verifying it at the IoT device. Moreover, a performance evaluation is performed for the system upgrade service with different parameters to sign the updates

IPTV open source

The continuous developments made on the network infrastructures allow to provide quality in multimedia services over-the-top. Also, mobile data traffic has been increasingly growing along with smartphone’s capabilities. This growth motivates the creation of multi-platform solutions that can target not only these devices but, in the case of the IPTV world, also the set-top-boxes, smart televisions and computers. HTTP streaming is a technique directed to stream over-the-top multimedia. Many global platforms make use of HTTP streaming, with names like Youtube or Netflix. In this work, a server architecture for streaming the public Portuguese channels as well as a multiplatform client architecture are proposed. The proposed software can be deployed on any regular server and provide extra functionalities such as tv listings. The client can run on any Media Source Extension (MSE) browser, without the need of any plugin like Flash. Finally, some tests were made on the two entities (server and client) in order to test the performance of the server and behaviour of the client through different network conditions.Os constantes desenvolvimentos a nível de infraestrutura de rede permitem fornecer serviços multimedia de qualidade sobre redes IP. Além disso, tráfego de dados em redes móveis tem crescido com o aumento de capacidades dos dispositivos móveis inteligentes, crescimento esse que motivou a criação de soluçõesmulti-plataformaquepodemdirecionarnãosóessesmesmosdispositivos, mas, no caso do mundo IPTV, também as set-top-boxes, televisores inteligentes e computadores. HTTP streaming é uma técnica direcionada a transmissão de dados multimedia sobre redes IP. Várias plataformas a nível global fazem uso de streaming HTTP, sendo Youtube ou Netflix dos exemplos mais conhecidos. Neste trabalho, é proposta uma arquitetura para um servidor de streaming dos canais públicos Portugueses, bem como, uma arquitetura de cliente multiplataforma. O software proposto pode ser implementado emqualquerservidorregularefornecerfuncionalidadesextra,comogrelhade programação. O cliente é suportado por qualquer navegador Media Source Extension (MSE) sem a necessidade de programas ou extensões adicionais, como o Flash. Finalmente, foram feitos alguns testes nas duas entidades (servidor e cliente) para testar o desempenho do servidor e o comportamento do cliente através de diferentes condições a nível de rede.Mestrado em Engenharia de Computadores e Telemátic

A Preventive Medicine Framework for Wearable Abiotic Glucose Detection System

In this work, we present a novel abiotic glucose fuel cell with battery-less remote access. In the presence of a glucose analyte, we characterized the power generation and biosensing capabilities. This system is developed on a flexible substrate in bacterial nanocellulose with gold nanoparticles used as a conductive ink for piezoelectric deposition based printing. The abiotic glucose fuel cell is constructed using colloidal platinum on gold (Au-co-Pt) and a composite of silver oxide nanoparticles and carbon nanotubes as the anodic and cathodic materials. At a concentration of 20 mM glucose, the glucose fuel cell produced a maximum open circuit voltage of 0.57 V and supplied a maximum short circuit current density of 0.581 mA/cm2 with a peak power density of 0.087 mW/cm2 . The system was characterized by testing its performance using electrochemical techniques like linear sweep voltammetry, cyclic voltammetry, chronoamperometry in the presence of various glucose level at the physiological temperatures. An open circuit voltage (Voc) of 0.43 V, short circuit current density (Isc) of 0.405 mA/cm2 , and maximum power density (Pmax) of 0.055 mW/cm2 at 0.23 V were achieved in the presence of 5 mM physiologic glucose. The results indicate that glucose fuel cells can be employed for the development of a self-powered glucose sensor. The glucose monitoring device demonstrated sensitivity of 1.87 uA/mMcm2 and a linear dynamic range of 1 mM to 45 mM with a correlation coefficient of 0.989 when utilized as a self-powered glucose sensor. For wireless communication, the incoming voltage from the abiotic fuel cell was fed to a low power microcontroller that enables battery less communication using NFC technology. The voltage translates to the NFC module as the digital signals, which are displayed on a custom-built android application. The digital signals are converted to respective glucose concentration using a correlation algorithm that allows data to be processed and recorded for further analysis. The android application is designed to record the time, date stamp, and other independent features (e.g. age, height, weight) with the glucose measurement to allow the end-user to keep track of their glucose levels regularly. Analytics based on in-vitro testing were conducted to build a machine learning model that enables future glucose prediction for 15, 30 or 60 minutes

Telecommunication Systems

This book is based on both industrial and academic research efforts in which a number of recent advancements and rare insights into telecommunication systems are well presented. The volume is organized into four parts: "Telecommunication Protocol, Optimization, and Security Frameworks", "Next-Generation Optical Access Technologies", "Convergence of Wireless-Optical Networks" and "Advanced Relay and Antenna Systems for Smart Networks." Chapters within these parts are self-contained and cross-referenced to facilitate further study

Test automation in designware HDMI RX

The first rule of any technology used in a business is that automation applied to any operation will magnify the efficiency. The second is that automation applied to an inefficient operation will magnify the inefficiency. HDMI (High-Definition Multimedia Interface) is a leading technology in audio/video interface for transmitting uncompressed digital multimedia data. The limelight of this project is to automate the test procedure involved for testing HDMI-RX by using developed or customized software tools (Jenkins, python scripts,..etc.) targeting to reduce engineering manpower effort. The focus is not only on reducing the testing time but also to maintain an effective record of the final design parameters and ensuring exact result reproducibility. The testing of hardware components involves proceeding through several steps based on design parameters, evaluating results, and storing records to a File

EYECOM: an innovative approach for computer interaction

The world is innovating rapidly, and there is a need for continuous interaction with the technology. Sadly, there do not exist promising options for paralyzed people to interact with the machines i.e., laptops, smartphones, and tabs. A few commercial solutions such as Google Glasses are costly and cannot be afforded by every paralyzed person for such interaction. Towards this end, the thesis proposes a retina-controlled device called EYECOM. The proposed device is constructed from off-the-shelf cost-effective yet robust IoT devices (i.e., Arduino microcontrollers, Xbee wireless sensors, IR diodes, and accelerometer). The device can easily be mounted on to the glasses; the paralyzed person using this device can interact with the machine using simple head movement and eye blinks. The IR detector is located in front of the eye to illuminate the eye region. As a result of illumination, the eye reflects IR light which includes electrical signals and as the eyelids close, the reflected light over eye surface is disrupted, and such change in reflected value is recorded. Further to enable cursor movement onto the computer screen for the paralyzed person a device named accelerometer is used. The accelerometer is a small device, with the size of phalanges, a human thumb bone. The device operates on the principle of axis-based motion sensing and it can be worn as a ring by a paralyzed person. A microcontroller processes the inputs from the IR sensors, accelerometer and transmits them wirelessly via Xbee wireless sensor (i.e., a radio) to another microcontroller attached to the computer. With the help of a proposed algorithm, the microcontroller attached to the computer, on receiving the signals moves cursor onto the computer screen and facilitate performing actions, as simple as opening a document to operating a word-to-speech software. EYECOM has features which can help paralyzed persons to continue their contributions towards the technological world and become an active part of the society. Resultantly, they will be able to perform number of tasks without depending upon others from as simple as reading a newspaper on the computer to activate word-to-voice software