The purpose of this report is to document the experiments carried out, methods used and results gained during research into how the Silicon content of an aluminium alloy affects the coefficient of thermal expansion (CTE).The goal of this paper is to better understand and to find a relation between Silicon content and the coefficient of thermal expansion.Experiments were carried out using carefully prepared samples of Al Si alloys (0, 7, 10 and 20% Si content). Using these alloys, the CTE could be measured using a dilatometer.Comparative analysis carried out could map the effects of Silicon content on the coefficient of thermal expansion and an equation was created. Using simple graphs and the rule of mixture method, the authors were able to build a simple tool for calculating the CTE of specific aluminum Silicon alloys..

Arbetsmarknaden i Silicon Valley karakteriseras av faktorer som hög personalomsättning, nätverkande och risktagande. Denna arbetsmarknad har vuxit fram på en begränsad geografisk yta och består idag ca 7 500 företag. Mjärdevi Science Park är en av de snabbast växande teknikparkerna i världen, varför vi anser att en jämförelse av de båda arbetsmarknaderna är intressant. Syftet är att med utgångspunkt från de faktorer som karakteriserar arbetsmarknaden i Silicon Valley, genomföra en jämförelse med arbetsmarknaden i Mjärdevi Science Park. Denna uppsats kommer inte att behandla vad det är som gör en teknikpark ekonomiskt framgångsrik.

This report was written by Sofia Ericson and describes the degree thesis with the title: ?Connections between the growing site of bio fuel, the chemical composition of bio fuel ash and the deposit growth in a bio fuel fired boiler.? The purpose of this degree thesis was to avoid melted deposit growth in the bio fuel fired boiler at ENA Kraft in Enköping. Potassium and sodium are known to lower the melting point of bio fuel ashes and are therefore not wanted in the trees in higher amounts than necessary for the growth. Silicon is also known to be important for the deposit growth but it is not possible to say in general if higher or lower contents of Silicon is better. The relation between Silicon and other chemical substances is more important than the total amount of Silicon.

The purpose with our study is to investigate why Capgemini adopts the Rightshore strategy, how they implement this strategy and how it affects Capgemini?s core competence. We also aim to look at how the company?s knowledge management is supporting the offshoring strategey, in addition to how Capgemini ?keeps control of? its core competence in following the trend of offshoring to India?.

This paper describes the work done trying to diminish the noise present in the signal from an IR-detector. The project was aiming towards two different kinds of applications; heat protection and presence detection. The hypothesis was that the signal-noise ratio would decrease if a filter and a proper installation were used for the detector. Some experiments were executed to determine what kind of filter were the most suitable for each application and how these could be installed. After executing the experiments and evaluate the results we recommend to use a specific filter for each application.

This thesis deals with the development of a specification regarding a push-button, which will be used to control the gear-shifting function in an automobile. In addition to this the author will describe different techniques and theories that have been helpful in achieving data and results for the specification.Kongsberg Automotive AB, is located in Mullsjö, Sweden, the company supplies parts to the automotive industry. In the research and development department, R&D, there is a group that works with development of Shift-By-Wire systems. In an automobile with a Shift-By-Wire system the communication between the gear-shifter and the gear-box occurs electronically. The mechanical link is, in most cases, taken away and replaced by the digital system.

The use of Silicon carbide (SiC) as a base material in power electronics has manyadvantages, including high breakdown voltage and excellent temperature endurance.However, the packaging of such electronics presents major challenges and there is aneed for packaging that can operate in higher temperature. The purpose of this thesishas been to develop a test method and verify the functionality of SiC powertransistors prototypes with a new packaging technique developed by Swerea IVF AB.It includes setting up an electrical test-bed for power and high temperature cyclingand analysis of the results. Even though test confirmed functionality after thepackaging process, (at room temperature) the performance seemed to have been reduced. This could be a result of the measurement setup and the packaging process.In higher temperature the transistors failed to operate longer than a couple ofminutes which showed the weaknesses in the design and the challenges with this typeof packaging..

Detta projekt har syftat till att undersöka möjligheten att implementera en dopplerradar för använding av cyklister i trafik med hjälp av radarkomponent TRX_024_06 från Silicon Radar. Tanken är att radarkomponenten skall vara en del av ett varningssystem som uppmärksammar användaren för bakomvarande trafik.En dopplerradar har implementerats med hjälp av TRX_024_06 tillsammans med en USB-ansluten A/D-omvandlare (NI USB-6216), filter, förstärkare och en bärbar dator med studentversion av LabView installerat.De experiment som har utförts har visat radarkomponentens egenskaper i inomhusmiljö och i trafik, där signalbehandling sker med hjälp av program i LabView. De parametrar som har varit föremål för undersökning är hastighet och riktning hos de fordon som befinner sig bakom cykel.Det har även gjorts försök att ta fram tryckta Yagi-Uda antenner för mottagning och sändning av radiovågor. Dessa har tillverkats på kretskortlaminat och testats i nätverksanalysator och tillsammans med radarkomponenten..

This paper goes through solar energy and what uses it has. It is also a guide in the choice of solar collectors forthe real estate that I have drawn for the thesis work.Solar energy is a renewable source of energy from the Sun's light. Energy can be used to produce both heat andelectricity through solar collectors and solar cells. Some of the benefits of solar energy is that it is completely freeto extract, environmentally friendly and virtually maintenance-free. Disadvantages are that the technology isexpensive, does not cover the entire energy needs and takes a long time until it pays.

Medarbetarskapet har på senare tid blivit mer och mer aktuellt i både den privata och offentligasektorn. Organisationer och företag har börjat se sina medarbetare som de centrala aktörerna isina verksamheter, istället för att enbart se till cheferna och deras ledarskap. I stort handlarmedarbetarskapet om hur medarbetarna på en arbetsplats hanterar sin relation till sinarbetsgivare, till det egna arbetet och till sina arbetskollegor. Det medarbetarskap som råder på en arbetsplats kan, enligt litteraturen, beskrivas i termer av öppenhet och förtroende, engagemangoch meningsfullhet, gemenskap och samarbete samt ansvarstagande och initiativtagande.Vårt syfte med den här uppsatsen har varit att undersöka det medarbetarskap som existerar i tvåav Lilla Edets kommuns äldreomsorgsverksamheter. Genom enkäter och intervjuer har vi undersökt medarbetarnas och chefernas uppfattning om det rådande medarbetarskapet, och deras vilja till delaktighet gällande förbättring och utveckling av deras medarbetarskap.

The purpose of this project is to analyze and study the absorption of the substances ivermectin, spinosad and barettin to hydrophobic and hydrophilic surfaces, and to analyze and study if the barnacle larva are effected when they try to settle on the treated surface.Incubation tests with barnacle larva in Petri dishes were performed as well as absorption tests on hydrophobic and hydrophilic surfaces which were tested with ellipsometry. To determine the surface thickness.The barnacles were placed in hydrophobic as well as hydrophilic Petri dishes that had been incubated with ivermectin, spinosad or barettin. After four to six days the larva was counted to analyze the settling. From the results conclusions could be drawn about the adsorption abilities of the substances to the different surfaces.The barnacles were placed in hydrophobic as well as hydrophilic Petri dishes that had been incubated with ivermectin, spinosad or barettin. After four to six days the larva was counted to analyze the settling.

The purpose of this paper is to get a conception how prioritization and decision making works in technologically advanced companies. We wanted to understand how to administrate models and how to prioritize the best ideas and relate these to technologically advanced companies. How does the company make these decisions and who is responsible?We have chosen to observe TranSiC, a Swedish technologically advanced company that manufacture Silicon carbide transistors. They currently have nine employees and mange 10-20 projects simultaneously, but are aiming to expand their business.

The tribo system ice-curling stone was investigated in order to understand the mechanisms behind the stones' behavior on the ice sheet. The problem with non-identical stones should also be addressed.The stone curls, that is, its sliding path deviates from a straight line to the right for a clock-wise rotation and to the left for a anti-clock-wise rotation. Several mechanisms to explain this behavior have been proposed over the years but none has been successful.By carrying out experiments at the local curling rink and studying Silicon castings of ice- and stone-surfaces with scanning electron microscopy and vertical scanning interferometry, it has been decided that the curl is not due to dry friction, ice-debris or the difference in friction on the left and right side of the stone. The side force comes from the fact that the friction is higher at the back of the stone than at the front.The contact between stone and ice is never completely dry, nor in the hydrodynamic lubrication regime. It is probably a combination of hydrodynamic lubrication and a contribution from mechanical scratching of the ice.

The development of defoaming additives is steadily progressing and there are therefore always new and improved additives on the market. Some modern additives provide the desired defoaming effects by themselves, in contrasts to previous additives that needed to be used in combination with other additives. The task of this bachelors thesis was to evaluate the possibility of using these improved defoaming additives, with the aim to find alternatives that give the system better defoaming attributes while, at the same time, using less of the primary products. The tests were carried out in the coating type Teknocryl Aqua Combi 2780. The coating is a waterborne air drying acrylat-latex/alkyd based coating that can be used for both single coat painting and primer.

Problems with the current energy system, which partially relies on non-renewable fuels, are increasingly recognized. Emissions of greenhouse gases from fossil fuels may speed up global warming, which in turn leads to a number of negative consequences. Nuclear energy is risky and relies on consumption of a scarce resource. This leads to a demand of renewable energy that is also economically feasible. One possible renewable source of energy is solar energy.