The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

This report describes the initial work intended for updating the car sharing service Roadmate. Roadmate is one of the services received by the car rental company Hertz First Rent a Car. The goal was to present the client with design- and structure proposals for a car sharing service that includes high usability and at the same time remains aesthetically pleasing.The work is based on an initial study with data collection, mapping the target user group and its needs. Subsequent structural and design proposals for Roadmates company carpooling service are based on the facts surrounding the target group's needs. The result are well developed and tested design sketches with accompanying visual identity and sitemaps that can be the basis for the further work on the development of the service..

This paper was made together withTechPay AB, by their request.The dissertation has been divided into two separate parts; one of which is fully theoretical, with the focus on the security requirements of a digital cash register, and how to meet these requirements.The second part covers the implementation of anAndroid-oriented Java-library,created with help from the security requirements found in the first part. The purpose of this library is to make it easier to develop a cash register that uses payment terminals from TechPay.This paper also covers different communication protocols, encryption techniques and recommendations from authorities, banks and Android. This paper also contains a small review of how users are validated in applications on the current market that handles money transactions..

Operators and Internet service providers invest in broadband to be able to deliver new services that require higher data transmission rate. A way to make this possible is to use ADSL, Asymmetric Digital Subscriber Line, as the access technology. To be able to handle this technology, the service providers should do a pre-qualification. Methods and tools are needed to analyze the local copper lines and decide if these qualify for ADSL with respect to service availability and possible bandwidth through the lines. This report brings up some methods for pre-qualification of ADSL, the important quality parameters and how to gather them from the available services today.

Ett av målen i LSS är att skapa full delaktighet för de personer som omfattas av denna. För personer med utvecklingsstörning som funktionsnedsättning kan förmågan till kommunikation vara nedsatt. Det kan innebära svårigheter att uttrycka sin vilja och att göra sig förstådd. Individen kan bli beroende av omgivningens förmåga att tyda signaler och tolka kroppsspråk. Det innebär att personal där personer med kommunikationsnedsättning vistas blir ett slags filter ur vilken graden av delaktighet blir möjlig.

Research is a time-consuming endeavor which requires appropriate tools to manage often vast amounts of information. Militarization 2.0 is a research project aiming to explore Militarization in social media. The aim of this project is to design a user interface for supporting researchers in projects involving large amounts of data in qualitative studies. The project will follow the design process of the first version of the Militarization 2.0 research database interface. The design process involves user studies, interviews and design and testing of paper and digital prototypes.

SammanfattningRapporten innehåller en utredning om, hur och på vilket sätt, det är möjligt att minska det reaktiva effektuttaget vid Metsä Boards fabrik i Husum. Detta är inget problem i normalfallet, men om någon av fabrikens tre turbiner på grund av till exempel service inte är i drift så kan det reaktiva effektuttaget bli för stort enligt avtal med elnätsägaren. Om elnätsägarens gräns överskrids måste en straffavgift betalas per varje överskridet kVAr, vilket Metsä vill undvika. Fokus för arbetet ligger på fabrikens papperbruk eftersom detta är problemområdet.Efter genomgång av enlinjescheman och olika mätutrustningar som finns belägna i fabriken inses att det är mest lämpligt att kompensera i anslutning till bestrykningsmaskinen (BM1). Bestrykaren är den enda linjen på pappersbruket som inte har faskompenseringsutrustning.För att hålla sig inom nätägarens gräns beräknades att faskompensering med en kapacitet på 15 MVAr räcker.

Matematiska kunskaper är en central del inom digital spelutveckling. Metoderna hur man lär ut matematik och dess innehåll har dock inte utvecklats i samma takt som hur lär ut hur man utvecklar spel. Jag vill med den här uppsatsen och mitt kandidatarbete utveckla ett unikt kursupplägg av tillämpad matematik for spelutveckling i 2-D. Detta upplägg baseras på analys av tidigare erfarenheter av matematikstudier och samtal med övriga kursansvariga. Den be?ntliga kurslitteraturen som används på tekniska högskolor är väldigt avancerad i sin forklaring av teori.

Allt större och större andel företag väljer att presentera och förmedla varor och tjänster via e-handel. En viktig aspekt vid e-handel är att kunden känner förtroende för e-handelsapplikationen och företaget. Denna rapport redogör för vilken inverkan multimediala inslag har för förtroendet av en e-handelsapplikation, vid initialt användande. En undersökning har genomförts med hjälp av en kooperativ utvärdering av fyra e-handelsapplikationer vilka innehåller olika typer av multimediala inslag har.Resultatet av undersökningen visar att multimediala inslag inverkar positivt på förtroendet för e-handelsapplikationer. Däremot finns indikationer på att för hög grad av multimedialt inslag inverkar negativt på förtroendet för e-handelsapplikationer..

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

This study aims to investigate how and why teachers use social media to reach their students, and how they handle different levels of computer literacy among students.The purpose of this study is to investigate the experience of teachers using social media in their teaching. I have done interviews with two teachers, who use social media in different ways. One of the teachers makes her students publish their work on the Internet on wiki-spaces, and the other one use Facebook for discussions and teamwork. This report uses the pedagogy theories laid forth by Vygotskij as a vantage point to analyze the answers from the teachers. I have also looked at some of the published student texts on the Internet.This study concludes there are students who don?t have access to computers and Internet at home.

I denna rapport undersöks hur elektroniska böcker (eBooks) enligt standarden Open eBook Publication Structure kan komprimeras på ett effektivt sätt. Anledningen till att området valts är att en välanvänd standard för eBooks inte finns för tillfället. Standarden är relativt ny och senaste versionen av specifikationen har kommit ut under 2002. Med i utvecklingen av standarden finns många stora företag som exempelvis Adobe Systems Inc. och Palm Digital Media.

Society today is characterized by the transforming effect IT has had, the majority of the activities we perform on a daily basis involves one way or another digital technology. One area which has not yet seen the positive effects of IT is education. Despite the progress of technology, the school education has barely changed since it first saw the light of day. Our goal with this study is to investigate the possibility of implementing Gamification elements in educational environments and examine whether it could increase our young students learning motivation. We believe that this kind of implementation will have a positive effect for these young people since they have been interacting with games since they were small and are familiar with the driving force of a reward system.With this study we want to examine the opportunities and challenges that Gamification implementation brings out in a learning environment and therefore encourage and motivate our young ones to study even harder..