Dagens stora miljöutmaningar i form av förbränning av fossila bränslen och medföljande koldioxidutsläpp har också gjort att många individer blivit allt mer miljömedvetna. Avancerade sensor för att mäta koldioxid finns numera på marknaden i form av lågenergiförbrukande alternativ som Senseairs LP8. Att utveckla firmware och att bedriva utveckling med sådana avancerade sensorer är något som inte är speciellt enkelt för vanliga användare. I detta projekt har en plattform byggd på bluetooth och enkla gratis utvecklingsverktyg tagits fram. Denna prototyp ugör en grund för utvecklingen av ett klimatsmycke där CO2 skall rapporteras till en molntjänst via mobiltelefon. Med prototypen har det utförts mätningar av strömförbrukningen genom att mäta urladdningstid av superkondensatorer, spänningsfallmätningar av cr2032 batterier samt kompletterande kapacitansmätningar av superkondensatorerna. Dessa mätningar visar att strömförbrukningen för prototypen ligger i intervallet 1-2 mA, beroende av vilka inställningar som önskas. Metoderna är väldigt enkla men ger en relativt god uppskattning av den totala strömförbrukningen.

Submitted by camilla martins (camillasmmartins@gmail.com) on 2017-01-27T18:46:54Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AmazonsocialdtnIbrDtn.pdf: 7578245 bytes, checksum: 3e04b496168cafca3f479fe18e81df98 (MD5) / Approved for entry into archive by Edisangela Bastos (edisangela@ufpa.br) on 2017-01-30T14:26:02Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AmazonsocialdtnIbrDtn.pdf: 7578245 bytes, checksum: 3e04b496168cafca3f479fe18e81df98 (MD5) / Made available in DSpace on 2017-01-30T14:26:02Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AmazonsocialdtnIbrDtn.pdf: 7578245 bytes, checksum: 3e04b496168cafca3f479fe18e81df98 (MD5) Previous issue date: 2015-05-29 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / A presente dissertação de mestrado tem como objetivo discorrer sobre a maneira como as pessoas acessam informações, ressaltando que apesar da evolução tecnológica ainda existem grupos sociais que são excluídos, estando à margem do contexto social por não terem acesso à informação, devido à sua localização geográfica, por exemplo: as comunidades ribeirinhas da região Amazônica. Esta dissertação tem por base um trabalho que propõe uma extensão para a arquitetura IBR-DTN, de forma que permita a divulgação de informações, incluindo vídeos educacionais curtos e áudio livros. Com o objetivo de facilitar a troca de informações de curto alcance, foi desenvolvido uma camada de convergência Bluetooth para arquitetura IBR-DTN e para melhorar a troca de dados em contatos oportunistas de curta duração entre os nós DTNs, foi agregado um mecanismo para compreensão do Bundle. Foram efetuados também experimentos em um testbed de pequena escala e em um simulador, onde através da extrapolação de valores para uma escala maior podemos avaliar a eficiência da solução AmazonSocialDTN em contatos oportunistas para a troca de uma maior quantidade de dados e, desta forma, permitir às pessoas de comunidades ribeirinhas receberem conteúdo relacionado a serviços de inclusão digital. / Despite the evolution in deployed infrastructure and in the way that people access information, still there are those who are socially excluded and have no access to information due to their geographic location (e.g., riverside/countryside communities). This paper proposes an extension to a DTN architecture implementation to allow the dissemination of information in such communities, including educational short-video clips and audio books. The IBR-DTN architecture is complemented with a Bluetooth Convergence Layer, to facilitate the exchange of information over this short-range wireless technology, and with a Bundle Compression mechanism that aims at improving data exchange in short-lived opportunistic contacts happening among nodes. Experiments in a small-scale testbed and in a large-scale simulator environment show that nodes are indeed able to efficiently use contact opportunities to exchange an increased amount of data, allowing people in riverside communities to receive more content related to digital inclusion services.

This study aims at investigating a central mounted Indoor Positioning System based onBluetooth RSSI values and Kalman filtering where the Bluetooth module is mounted on arotating arm around an axle. The purpose is to investigate how the length of the arm and therotational speed influence on the possible positioning accuracy of the artefact. As requested bythe company Combitech AB, the artefact will also be evaluated whether the design is areasonable alternative to de most common Bluetooth based Indoor Positioning Systems. Thecase study is performed using design science as an artefact is developed and evaluated. Theartefact is tested in a predetermined test environment, in this case an office room. In the testenvironment, measurements will be realized on the different iterations of the artefact. Theresult of the study is the achieved positioning accuracy for the artefact in two and threedimensions. Linear equations describing the relationship between the length of the arm andthe achieved accuracy of the artefact will also be proposed. The best accuracy achieved in twodimensions was 510 centimeters. The best achieved accuracy in three dimensions was 730 centimeters. The observed relationship between the length of the arm and the uncertainty ofthe trilaterated position is that when the length of the arm increases the uncertainty decreasesin both two and three dimensions.

People with disabilities are both functionally and socially disadvantaged and the lack of access to mobile communication technology adds to their disadvantage. Changes and benefits we have seen in our society with the advent of mobile phones and associated electronic communication for people without disabilities have not migrated to people with disabilities. The comprehensive communication capability of a mobile phone can enable users anywhere to independently access a very wide range of communication, information and control systems and services. This research has addressed the key accessibility issues faced by people with disabilities who need or want to use the mobile phone for voice and data communication. The research revealed that: � there exist accessible features on mobile phones that can better assist people with disabilities in using the phone; � through education and training, people with disabilities can develop or be provided with effective and efficient ways to access and use the phone; � current, off-the-shelf telecommunications equipment such as car kits, speakerphone, voice recognition technology, wireless connectivity capability on mobile phones can enable people with disabilities, even severe physical disabilities, to access the telecommunications network and services; and � with a suitable interfacing system in place, Augmentative and Alternative Communication (AAC) device users can operate the phone for voice and data communication, which previously had not been possible. Trials established that people with a range of physical disabilities can use and should have equal access to telecommunications equipment and services. This research has shown that, with the right policies, processes and support through equipment matching, education, training and delivery, current off-the-shelf solutions can help people with disabilities to effectively communicate with other members of our society and to access the same range of information systems and services enjoyed by able-bodied members of the community. An interfacing system has been developed to provide users of AAC technology with the ability to use a mobile phone for voice calls and text messaging (SMS). It is confidently predicted that other features and services on the phone such as speakerphone, digital camera and FM radio, email and internet-based applications, and local or remote appliances and devices, can be controlled via the AAC device. Outcomes and findings have confirmed the main hypothesis of the thesis that, despite very limited mobility, speed, accuracy and vocal communication ability, users will be able to successfully operate the mobile phone itself, and use it for various modes of bidirectional communication with systems to which they choose to connect. The overall outcomes of the research have established that the benefits and usefulness of the mobile phone are so significant that they should become a necessity for people with a disability. It has been successfully demonstrated that, with the proper mechanisms and educational programs in place, the provision of accessible mobile phones for people with disabilities can significantly improve their quality of life through increased range of accessible activities, and will improve their independence, engagement with their peers, safety, security and self-esteem.

Aujourd'hui, les nouveaux appareils électroniques de télécommunications tendent toujours à plus d'innovations, plus de services et le tout dans de faibles dimensions. Face à un nombre de standards toujours croissant, les nouvelles antennes associées doivent être capables de couvrir plusieurs bandes de fréquences avec des caractéristiques de rayonnement variées, en un minimum d'encombrement. Cette thèse a permis la conception de plusieurs antennes combinées à polarisations multiples pour les applications spatiales. À partir d'un état de l'art d'antennes de géométries variées et devant la complexité de disposer de plusieurs types de polarisations au sein d'un même élément, l'étude a été divisée en deux parties. La première présente en particulier une antenne quadribande fonctionnant en polarisation linéaire pour les standards Bluetooth et WLAN. Sa géométrie consiste en un élément de fine épaisseur, replié en forme de U, entouré d'une cavité cylindrique. La seconde partie propose plusieurs antennes bibandes en polarisation circulaire, basées sur le principe d'éléments imprimés carrés à coins coupés: une antenne monocouche pour les standards GPS-SDARS et une antenne bicouche dédiée aux deux bandes de fréquences GPS existantes. Au final, en combinant ces différents éléments rayonnants, on obtient des antennes multistandards regroupant les deux types de polarisations, linéaire et circulaire.

<p>The Swedish National Testing and Research Institute is maintaining the Swedish realization of the world time scale UTC, called UTC(SP). One area of research and development for The Swedish National Laboratory of Time and Frequency is time synchronization and how UTC(SP) can be distributed in Sweden. Dissemination of time information by SP is in Sweden mainly performed via Internet using the Network Time Protocol (NTP) as well as via a modem dial up service and a speaking clock (Fröken Ur). In addition to these services, time information from the Global Positioning System (GPS) and from the long-wave transmitter DCF77 in Germany, is also available in Sweden. </p><p>This master’s thesis considers how different available commercial communication systems could be used for multicast time distribution. DECT, Bluetooth, Mobile Telecommunication and Radio Broadcasting are different techniques that are investigated. One application of Radio Broadcasting, DARC, was found to be interesting for a more detailed study. A theoretical description of how DARC could be used for national time distribution is accomplished and a practical implementation of a test system is developed to evaluate the possibilities to use DARC for multicast time distribution. </p><p>The tests of DARC and the radio broadcast system showed that these could be interesting techniques to distribute time with an accuracy of a couple of milliseconds. This quality level is not obtained today but would be possible with some alterations of the system.</p>

<p>The concept of remote controlling electrical devices is not new; people of today are used to being able to control their household electronic items without making an effort to walk up to the device. </p><p>In this thesis the aim is to use Bluetooth radio signals instead of the traditional infrared light to achieve the remote control functions. As a test application a Sony Compact Disc player is modified in order to be radio controlled with a standard Ericsson T39 mobile phone used as a remote. Since the test application is rather simple without any special requirements the development of a specific radio communication system has not been considered. Instead available pre-manufactured devices were examined. A Bluetooth evaluation kit was purchased and the test project consisted of the goal of linking the evaluation board to the CD player with an AVR microcontroller and getting the whole system to communicate with the mobile phone.</p>

<p>Mobile telephony technology like GSM made portable telephony a possibility. The arising and development of the Internet made a revolutionary change to communication and interchange of information. Bluetooth wireless technology revolutionizes personal connectivity by providing freedom from wired connections. Combining these technologies together brings the concept of Mobile@Home of Ericsson. </p><p>Mobile@Home is a fixed-mobile convergence concept using the fixed network to carry present and future mobile services (e.g. voice, video, mail and Internet access) all the way to the home or office. By combining the high bandwidth of the fixed access network with the wireless technology of Bluetooth, Mobile@Home makes it possible to deliver high bandwidth to the mobile phone. Mobile@Home requires a Bluetooth enabled mobile phone and a Bluetooth enabled HBS (Home Base Station), placed at the home or office. By means of fast IP access (ADSL, cable modem etc.) the HBS connects into the standard mobile core network through a HBSC (Home Base Station Controller). </p><p>The purpose of this thesis is the generation of simulated traffic between the HBS and HBSC and to analyze its behavior. This primary involves generation of signaling through an internal protocol, provided by Ericsson, for management and call control, and generation of GSM EFR (Enhanced Full Rate) voice streams over the RTP (Real Time Protocol) protocol. The simulation will consist of both the HBS and MS (Mobile Station). A set of HBS: s with attached MS will call one another through the HBSC. In this assignment only the GSM signaling will be considered because of time and scope limitations. The goal is to validate the RTP traffic generated towards the HBSC. Parameters like packet loss, packet delay and erroneous packets will be analyzed.</p>

<p>This thesis discusses design of narrowband low noise amplifiers for multi¬standard applications. The target of this work is to design a low noise ampli¬fier(LNA) for DCS1800 and Bluetooth standard frequency bands. Various designs for narrowband multi-standard LNAs have been studied and a new design for tunable multi-standard LNA has been presented and designed using accumulation mode MOS varactors.</p><p>As this design includes on-chip spiral inductors, the design, modelling and layout of on-chip inductors have been discussed briefly. The tool used for this purpose is ASITIC.</p><p>Also ESD protection techniques for RF circuits and their effect on LNA per¬formance has been discussed.</p><p>Finally fully differential LNA has been designed in O.35um AMS thick metal CMOS process using Cadence SpectreRF. The design also includes ESD pro¬tection at the input of LNA.</p>

<p>Title: Creating high awareness – A study in how a company can create awareness with cost efficient marketing methods. (Skapande av hög medvetenhet – En studie i hur ett företag kan skapa medvetenhet med kostnadseffektiva marknadsförings metoder).</p><p>Authors: Alexander Edlund and Fredrik Hansson</p><p>Aim: Our aim is to reveal the pros and cons of cost efficient marketing and decide which cost efficient method works best in creating awareness. We also want to determine if the methods can be integrated in a successful way to achieve greater awareness.</p><p>Method/Material: We have made a qualitative approach by conducting three in depth interviews with the company Bluetooth SIG’s marketing director Anders Edlund. Our theoretical foundation is mainly built on theory from the databases and library supported by Uppsala University.</p><p>Main results: We discovered that co-branding and PR are the two most cost efficient methods in creating awareness for the company Bluetooth SIG. We also found the possibility of integrating the methods in a way that effectively strengthens and reinforces the awareness. We recommend future research in both areas to further examine our results.</p><p>Number of pages: 32 pages including abstract and references</p><p>Course: FEK C, Bachelors thesis</p><p>University: Department of Business Studies, Uppsala University</p><p>Period: 2007, Spring semester</p><p>Tutor: Olivia Kang</p><p>Keywords: Awareness, cost efficient marketing, integrating, Bluetooth, co-branding, PR, online-marketing, word-of-mouth/buzz marketing</p>