Due to their complexity and heavy wear from rail traffic, switches are a sensitive part of the railway infrastructure and moreover expensive to maintain. Furthermore, increasing railway traffic not only accelerates the wear rate but also obstructs the necessary maintenance measures. This paper examines the opportunities for a transition to a long-term maintenance strategy in the Swedish railway network. It contains a study of the maintenance strategy of Banverket, and also analyses statistics of errors in the railway infrastructure. The survey was completed utilising interviews with infrastructure managers, maintenance contractors, planners of railway operations and the Banverket material service department.

Detta examensarbete har utförts med begäran från Trafikförvaltningen. Arbetets huvudmål är att undersöka om det är möjligt att använda värmestrålning direkt mot ytan av strömskenan för att hindra isbildning på en kortare tid då absorptiviteten är som bäst..

The Swedish National Rail Administration has changed in the past decade, from its origin after a less dramatic separation from the Swedish State Railways to becoming an authority with its own identity. Today the National Rail Administration is a large organisation with several different departments, each with its own unique function. To operate train services the railway needs to be ?in shape?, leading to a need for maintenance, reinvestments and new investments. For this purpose, the National Rail Administration carries out public procurement where contractors, who are able to perform maintenance and new construction, submit tenders.

This report is a description of a developed educational simulator over rail vehicles and its components. The simulator is a hardware-based prototype over a door system on rail vehi- cles. System specialists and technicians will use the prototype. The Simulator should give the user a technical demonstration on how components work in a door system. The proto- type consists of motor, switch, relay and sensor.

This report is a description of a developed educational simulator over rail vehicles and its components. The simulator is a hardware-based prototype over a door system on rail vehi- cles. System specialists and technicians will use the prototype. The Simulator should give the user a technical demonstration on how components work in a door system. The proto- type consists of motor, switch, relay and sensor.

In this thesis a transport system is sought after thatif realised in the city of Uppsala could provide bothwell-being to all its inhabitants and sustainability,here jointly refered to as liveability. It is found thatthe car dominated transport system that is inoperation today provides two fundamental values,namely accessibility in both time and space, whichsets it apart from other transport solutions. Thesetwo values are of immense importance for theliveability in our modern world. On the other handthe car dominated system decreases the liveabilityof Uppsala in several different ways. Some of theseproblems, it is argued, could be solved within thecar system, through the adoption of moreenvironmentally friendly cars etc., but otherproblems are inherent in the car system and willremain no matter what changes are made.

Cattle have a species specific movement pattern when lying down and getting up. They need sufficient space for their heads to perform these movements normally. The aim of this study was to investigate the lying down and getting up behaviour of beef bulls at a Swedish farm operation. The hypothesis was that bulls older than 10 months (over approximately 400 kg) were disturbed by a horizontal front rail and that the time to lie down and get up differed from what can be regarded as normal based on earlier scientific studies. The bulls were Swedish Red and White (SRB), Swedish Friesian (SLB) or crossbreeds of these two, and were kept in a cubicle system with a stall front design where there was a horizontal rail 40 cm above the stall floor.

The use of technology in today's society is frequent and often necessary, but how, when and where are we supposed to learn how to use it? And if it is such a big and important part of our society, then why don?t teachers get more training in how to use the technology? The purpose of this paper is to examine whether teachers attitudes to technology affects their use of technology in their teaching. In school technology can be a complementary to other material, if teachers have the necessary skills to use technology in a pedagogical way. I have chosen to do a qualitative study in form of interviews and observations at a school outside of Stockholm. The results show that both school and teachers must want to work with technology if anyone will be getting something out of it.

The use of technology in today's society is frequent and often necessary, but how, when and where are we supposed to learn how to use it? And if it is such a big and important part of our society, then why don?t teachers get more training in how to use the technology? The purpose of this paper is to examine whether teachers attitudes to technology affects their use of technology in their teaching. In school technology can be a complementary to other material, if teachers have the necessary skills to use technology in a pedagogical way. I have chosen to do a qualitative study in form of interviews and observations at a school outside of Stockholm. The results show that both school and teachers must want to work with technology if anyone will be getting something out of it.

This thesis examines the reasons to why railway projects conducted by Banverket (Swedish National Rail Administration) could be expected to cause significant effects on the environment, on which grounds the County Administrative Board and Swedish National Rail Administration base their decisions/assumptions and highlight regional differences between the different Swedish national rail administrations regions. Total 24 railway projects, conducted or being conducted, during the time period 2001 - January 2010 have been analyzed and studied. These projects represent eight different measures/activities which are dispersed throughout all five of the Swedish National Rail Administration´s different regions. Swedish legislations demands that the planner of a new railway project shall first conduct a pre-study and then conduct a public consultation which provides the participants an opportunity to provide input. The County Administrative Board shall then decide if the project could cause significant effects on the environment.

Global warming is going to affect our society in many ways. One can say that the problem we face has two different sides. One of those sides has received a lot of attention, namely how we can reduce our emissions of greenhouse gases. However, because of the climate system's inertia the climate will continue to evolve over a period, no matter how much we will cut back on emissions. Because of this, we have to start adapting our society to the climate changes that we cannot influence.

AbstractThe purpose of this study is to see how technology is presented in different fictional picture books that are available in preschool. Six fictional picture books that have connection to technology in picture and text have been analysed. In order to show how technology can be made visible in fictional picture books, the relation between picture and text has been analysed through a technology perspective. Furthermore, the pictures and the texts have been analysed separately in order to show what they show respectively in terms of technology. The fictional picture book has a potential to be a basis for making technology visible in preschool, which is a step in a new direction.

AbstractThe purpose of this study is to see how technology is presented in different fictional picture books that are available in preschool. Six fictional picture books that have connection to technology in picture and text have been analysed. In order to show how technology can be made visible in fictional picture books, the relation between picture and text has been analysed through a technology perspective. Furthermore, the pictures and the texts have been analysed separately in order to show what they show respectively in terms of technology. The fictional picture book has a potential to be a basis for making technology visible in preschool, which is a step in a new direction.

The purpose of this paper is to find out if technology within pedagogy can help pupils with dyslexiaperform on the same level as their peers without using compensatory aid. Is it possible to replacethe compensatory aids with the technology in question? Can the same technology also be used tosupport other pupils as well and in turn removing the stigma of needing compensatory aid?To learn the answers to these questions I have done a qualitative text analysis. This analysis focuson technology in the form of podcasts and Web 2.0 based teaching platforms. The analysis alsofocus on pupils with dyslexia and what kind of help compensatory aids can be.

SammanfattningI utvecklingen av den encylindriga forsknings-diselmotorn Hatz 1H30 på TechnischeUniversität München har tidigare en ottoinsprutare använts i kombination med ettcommon rail-system som en temporär lösning. Ett common rail-system ger möjlighetenatt separera regleringen av insprutningen från de mekaniska komponenterna av motorn.En common rail-insprutare gör det möjligt att göra flera insprut varje arbetscykel ochtillhandahåller möjligheten att elektroniskt variera timingen av insprutningen.Efter att en marknadsundersökning har gjorts bland huvudtillverkarna av injektorerinköptes en Bosch CRI2 injektor från en BMW M47N-motor. Det förra cylinderhuvudetvar anpassat för en ottoinjektor och var därför tvunget att designas om. En konstruktiongjordes för att fästa injektorn och för att försluta förbränningskammaren.För att styra injektorn behövs ett flertal signaler för att utvärdera vevaxelpositionen ochbetämma insprutstimingen. Behandlingen av dessa signaler och mjukvaran för styrningvar först testade med en AFT PROtroniC motorstyrenhet för sig själv i en provrigg meden signalgenerator.