In the last few years people have become more and more aware of how humanity is affecting the climate. In the direction of reducing the greenhouse gases is to design engines with higher tensile properties and reduced weight, in order to achieve lower fuel consumption and cleaner fuel incineration in today's truck engines.In order to achieve these requirements it?s necessary to increase the combustion pressure in the engine. This requires higher tensile properties and high thermal conductivity of the engine material. The department of Component Technology at the University of Jönköping in collaboration with Volvo Powertrain AB, Scania CV AB and DAROS Piston Rings AB has been commissioned to develop this material and to find knowledge of material properties used in truck engines and piston rings used for marine applications.The purpose with this work is to analyze the tensile properties of a series of cast iron, cast under different metallurgical conditions.Four different series of cast irons have been analyzed from four points of view, carbon concentration, nodularity, amount inoculation and cooling rate.After the tensile test all specimen data was analyzed in a mathematic calculation program called Matlab 2006a.

Syftet med det här arbetet har varit att välja ut och integrera en lämplig fysikmotor med öppen källkod i simuleringsprogramvaran EWSim på Totalförsvarets Forskningsinstitut (FOI). EWSim är ett ramverk för duellsimulering i olika telekrigsscenarier. Teorin bakom fysikmotorer och några vanliga tekniker för fysiksimulering har beskrivits kortfattat. Tre fysikmotorer har presenterats och utvärderats med avseende på lämplighet för integrering i EWSim.Fysikmotorn Bullet valdes ut och integrerades i simuleringsprogramvaran. En av de huvudsakliga slutsatserna av arbetet är att fysikmotorer som Bullet mest kan bidra med ökad visuell realism i EWSim.

 AbstractThis Master?s thesis analyses the dynamics of the medieval counterweight lever engine, ortrebuchet, a type of mechanical artillery. The purpose is to study the differences between different types of these machines, and see if computer simulations can be used to validate preserved advice on construction. Simulations include machines with a fixed counterweight, a hinged counterweight and a combination of both counterweights.Due to the almost complete lack of archaeological finds and insufficient historical source material there are still, after more than a century of research, many unanswered questions concerning the design and performance of these machines.The present study is based on an analysis by Jahsman (2004). A more detailed mathematical model employing Coulomb-friction is used.

In this thesis I will propose and test a pipeline for creating in-game animations using motion capture technology, with the aim to export to a 3D game engine, such as UDK or similar. Even though there are already established pipelines for creating in-game animations in the game industry, they are not of public knowledge and dissemination of information is hindered by the severe NDA (non-disclosure agreements) imposed on the studios and artists. I will therefore use my experience with game production and as a student, to research and propose an optimal pipeline for developing in-game animation that may be used by other students, researchers and independent game developers. The methodology used to test the pipeline will be a case study based on the student project Synergy, which I am developing with other third year students also attending the Game design Education at Gotland University..

Syncore Technologies har tagit fram en digital telemetri mottagare som använder sig av USBperiferi anordning som ska kunna etablera oavbruten kommunikation mot sin värddator.Den tidigare designen av USB applikationen till digitala mottagaren är utvecklat av ett annatföretag. Problemet med den designen är att den kan stanna av under överföringen. Ett krav förden nya designen av USB gränssnittet är att den ska kunna etablera ett konstant data flödeutan att under en längre tid stanna av mitt under överföringen. Syftet med detta arbete är attordna en stabil överföring mellan mottagare och dator. Gruppen har valt att användanuvarande kretsuppsättning och utveckla egen mjukvara.

Sweden has distinct seasons with cold winter and temperatures down to minus 25 ?C andpleasant summers with temperatures above 20 ?C. During spring and autumn there could becomechallenges with precipitation. The diverse climate in Sweden affects many homeowners. For thepeople living in leisure boats and permanent housing boats the seasonal changes are clearlyimpacting their economy and the indoor climate.

This master?s thesis describes the development of a model of the catalystsystem aiming at control by an MPC. A well functioning model, which is suitable in control purpose, is important while emission legislation become more and more hard to fulfill for the car manufacturers. Much research has been done in the field of physical modeling of the system, but in this work a linear adaptive time discrete ARX-model is developed and validated.The systems tendency to change its dynamic during usage implies that the model must be adaptive. The developed model proved to be well functioning and shows promising conditions for the MPC design.

Valmets own foundry in Karlstad has during a long period of time had problems being profitable. The goal today is to turn this around. Today there are three different productionlines; engine blocks, Yankeecylinders and components for the wind turbine industry. This master thesis has focused on examining if value stream mapping is a useful tool to use in a foundry, and therefore outside the typical manufacturing industry. The target has also been to evaluate if there is a possibility to improve the flow in the foundry and also the results.During the 20 weeks this work has been done at the foundry data has been collected and analyzed.

LIBRIS is a national library search engine offering information about 6 million books, articles, dissertations and other materials held by Swedish university libraries, research libraries and public libraries. In December 2007 a new version of LIBRIS was launched, developed with focus on usability, simplicity and accessibility. This thesis examines how the new LIBRIS is used, what is working well and what could be improved and also what the users think of LIBRIS. The following report is based partly on a study of usability and partly on a series of tests where librarians, scientists, students and developers have executed a number of tasks while thinking aloud. The users also participated in an interview.

Syftet med arbetet var att undersöka hur lärare och elever interagerar med varandra och hur det naturvetenskapliga innehållet presenteras och kommuniceras under en naturvetenskaplig lektion på gymnasiet. Studien ingår i det nordiska forskningsprojektet Explora som arbetar med naturvetenskaplig undervisning och som har tagit fram en kodbok för detta ändamål. Utgångspunkten är sociokulturellt lärande, där kommunikationen är viktig för lärandet, där lärande innebär att socialiseras in i en diskurs och att språket används olika i olika kontexter. Undersökningen var till största delen kvantitativ och deduktiv men med kvalitativa inslag. Kodboken användes som analysinstrument och därmed gjordes en slags innehållsanalys.

Examensarbetet har gått ut på att genom kvalitativa undersökningar ta reda på hur grafisk form ochinformationsstruktur samverkar för att skapa användarcentrerade webbplatser. Målet var att ta fram en grund för huranvändarcentrerade webbplatser bör byggas. Denna grund är tänkt att fungera som riktlinjer för formgivare som villskapa användarcentrerad webbdesign.Studien visar att det viktigaste för att skapa användarcentrerad webbdesign är att involvera användarna kontinuerligti utvecklingsprocessen. Detta sker genom användartester och intervjuer med representanter för målgruppen. Vi harkommit fram till att graden av användbarhet spelar stor roll för hur målgruppen uppfattar webbplatsen som sådan,men också vilken uppfattning de får om företaget bakom..

 This abstract describes the bachelor degree thesis in computer technology at Växjö University. The company BSR in Växjö has requested an application that can measure a cars performance, with attributes like acceleration times and engine power estimation. The communication between car and computer is via the USB port on the computer and the OBD-II socket on the car with the network protocol CAN, controller area network. Cars from VAG have been the primary focus group and the application has been tested on a Volkswagen Passat CC from 2009. The system is developed in the programming language C# in the environment Visual Studio with the framework .NET.

My work has resulted in an interactive search engine for plants that can be found at www.plantit.se. In the work process I have searched for which search criteria is most important when doing searches on woodland plants. I have done this by an analysis of existing databases and with an survey where leading plant expertise answered questions about woodland plants. I analyzed three search pages that are on the internet today Havenet.dk, Backyardgardener.com and Den virtuella floran. I concluded that there are several flaws but also many positive aspects that I have used when developing the interface of my page. The survey resulted in the basis for my search criteria the answers listed the most important factors when planting woodland plants. From this information I developed a system with five values on every criteria.

Denna rapport behandlar push-teknik, en teknik för att skicka data i realtid inom webbapplikationer.Många gånger i dagens mer interaktiva webb kan ett behov finnas av att behandla data på ett alternativt sätt. På grund av detta kändes det valda ämnet relevant inom ramen för webbutveckling.Syftet är att undersöka hur vida denna teknik skiljer sig mot andra tekniker för att transportera data. För att kunna undersöka push-tekniken har en applikation skapats med hjälp av ett ramverk för detta ändamål. Som ramverk för arbetet valdes APE som innehåller en komplett lösning för push-teknik på webben.Som underlag för rapporten utvecklades en spelapplikation samt en utvärdering av ramverket APE och ett antal prestandatester gjordes..

Dione kullager AB is a company in Uppsala, which sell industrialmachinecomponents, transmissionsolutions and provides repair serviceof hydraulic components.When a hydraulic cylinder is about tobe repaired it needs to bedisassembled. Because hydrauliccylinders usually work in dirtyenvironments and are heavilyworn some types of cylinders arealmost impossible to disassemble.Today the disassemble is made by hand,which means extra work for themechanics. In order to facilitate thedismantling of this type of cylindersa machine is to be developed for thispurpose and this is where this thesisbegins.The thesis has been organized in threephases: Literature study in whichfacts and theories are acquired.Concept generation in which differentconcepts, calculations, and solutionswere identified and selected. Thedesign phase where all the differentconcepts of components were assembledand simulated in SolidWorks. Similarstructures have also been studied inorder to identify necessary functions.The thesis resulted in a structurewhich is believed to meet therequirements.