Hawk Turbine AB tillverkar mindre jetmotorer som ofta används i små obemannade och radiostyrda flygplan. I flygplansmodellen Lockheed T-33 Shooting Star är motorn monterad inuti planet varför luften måste ledas ut till atmosfären. För bästa möjliga prestanda måste ejektorn och utblåsröret som leder luften dimensioneras efter motor och flyghastighet.En 3-dimensionell CAD modell av flygplanets installation skapades och därefter simulerats i en virtuell vindtunnel med hjälp av datorprogrammet SolidWorks Flow Simulation. Flera olika utblåsrör i varierande storlekar samt olika former har testats för att avgöra om ändringar kan förbättra prestandan ytterligare.Simulationsresultat visar att det går att förbättra nuvarande konfiguration med 5,99 % om diametern på utblåsröret minskas från 75 mm till 70 mm med en bibehållen form på utblåsröret..

Background: It is common that children and adolecsents with Aspergers syndrome have impaired motor skills and are less physically active than neurotypical children and adolecsents. Studies conducted on neurotypical children shows that children and adolecsents who are regular physical active also have a good motor control and a good physical self-esteem. The purpose of this study was to investigate the physical self-esteem of children and adolescents with Aspergers syndrome. Study Group: 36 children and adolescents aged 9-15 years with a diagnosis of Aspergers syndrome was asked to participate in the survey. 18 children, 16 boys and 2 girls, responded to the questionnarie about physical self-esteem which 17 of the answers could be used in the study.

When cylinders for motor saws are manufactured there are high demands on the cylinders strength and wearing qualities. Aluminum is a material with low density and is used by Husqvarna AB for their motor saw cylinders. The aluminum is strengthening with nickel that is attached to the cylinders through electrolysis. When aluminum is in contact with oxygen a film of oxide is formed. To eliminate the oxide and to prevent formation of new oxide zinc is used.

The purpose of this work was to determine how important a word?s setting was for the readability of typography in motion. Facts regarding how reading works and the importance of the words formation for the readability were used to form a computer test. This test was performed by 15 test persons and the results were analyzed. The results show that the serif was easier to read than the sanserif.

AbstractThe purpose of this paper is to investigate to what extent LS ? a standard screening test for dyslexia ?is also relevant for the purpose of finding second language students with dyslexia. Starting with an overview of recent studies in the field, I have analyzed texts from parts of the chosen material. After a brief presentation of the test, I have presented it from a second language point of view. Furthermore, I have analyzed the way in which the test measures phonological awareness, lexical accessibility and correctness in language.

Denna underso?kning so?ker ett svar pa? hur den relativt vana lyssnarens bedo?mning av ljudkvalitet pa?verkas av ett sa? kallat o?ppet test, da?r det som bedo?ms a?r ka?nd fo?r lyssnaren, ja?mfo?rt med ett blindtest, da?r detta objekt a?r oka?nt. Fra?gan appliceras pa? kvalitetsbedo?mningen av digitala kodningstekniker, d.v.s. hur lyssnaren pa?verkas av att valet av kodningsteknik som avlyssnas a?r ka?nd eller inte.

Ipendo Systems in Linköping, Sweden, is a small IT consulting firm developing among other things custom portal applications based on Microsoft Sharepoint 2010. The purpose of this thesis is to investigate whether the test tools TestComplete and LoadComplete provide sufficient compatibility for functional and non-functional testing of Ipendo Systems? Sharepoint based applications, as well as design testing related activities to be incorporated into their existing software development framework. A test process maturity framework was chosen and applied for the design of the testing activities, while the test tool investigation resulted in guidelines on how to apply the tools effectively and circumvent any issues discovered..

Rapporten fokuserar på MY500 som är en jetprinter som skjuter lodpasta påkretskort utan att beröra den. Syftet med rapporten är att undersöka möjlighetenatt ersätta den nuvarande skruvpumpen med en spiralpump. Intentionenär att utarbeta en prototyp där spiralpumpen drivs av en positionsåterkoppladlikströmsmotor (DC motor). Prototypen används för att verifierafunktionen hos den tidigare oprövade spiralpumpen och för att fastställa om enstandard DC eller växelströmsmotor (AC motor) kan användas för att ersättaden befintliga stegmotorn.Arbetet börjar med en undersökning av olika motortyper för att sedanskapa en Matlab/Simulink modell med den valda motorn och parametrar förfriktion och tröghetsmoment. Genom simulering används modellen för att undersökaolika reglerstrategier vilka omfattar både hastighets- och positionsreglering.Olika samplingsfrekvenser analyseras för att hitta en lämplig regulator.Prototypen används för att verifiera regulatorns beteende och för att fårealistiska systemparametrar.

The purpose of this project is to get a fully functional, automatic steering system and a variable breaking system with an emergency breaking function to an off road vehicle. This off road vehicle is supposed to work as an aid in military situations. A team of two, Sebastian Attervall and Nichlas Gustafsson, got an order from Jonas Nyårds and the PreeRunners Project to construct a steering system that could manoeuvre an off road vehicle without any human involvement. To make this possible the vehicle would be guided by onboard sensors, cameras and computers. The team where also assigned to construct an automatic breaking system, there also no human would be involved.

The aim of this study has been to examine if an implementation of a One Stop Shop in the public sector and its IT-support can serve as a motor for business development. By examine the relation between the One Stop Shop and the public administrations we have tried to answer this question. The municipality that we have examined underwent a big change, seven years ago, when they implemented a One Stop Shop including a IT-support called Flexite. But despite these seven years and the fact that Flexite has changed approach from a Case Management System to a Support System for Business Development the municipality have not adapted to this change. .

The purpose of our essay is to study the institutional-, demographic and accounting theoretical factors that influence an organisations actuarial commitment.The research was performed through a web based survey, with complimentary telephone interviews, directed to companies listed on Stockholm Stock Exchange A- and O-list on the 30 of November, 2003.Our data was analysed with a Median test, Kolomogorov-Smirnov test, T-test and a Mann-Whitney test. The purpose of the Mann-Whitney test was the low number of respondents that took part in the research. The Kolomogorov-Smirnov test was done to determine whether the population variances was equal or not. The data showed that organisations with a majority of female employees assume a lower salary increase, and a higher average age than other companies with a male majority. Only 2 of 11 hypothesis can be accepted as temporary truths but several other visible relations are indicated in our research, but can not be statistically proved.We think that the major problem with our is the time it was performed.

Mechanical relays are more and more being replaced with semiconductortechnology. In this thesis it is investigated if and how the larger loads couldbe controlled by transistors. The main part of this work aims to create andverify a solution that can control the starter motor, as well as protect it incase of any failure. The different malfunctions that the solution protectsagainst is high current, too high peak current, low current, maximum cranktime and minimum cool off time. The timers also protect indirectly againstoverheating of the starter engine.The transistors used are BTS555, from Infineon.

Examensarbetet behandlar en jämförelse av Server Message Block 3.0 och föregångaren 2.1 i ett befintligt nätverk. Jämförelsen utfördes i fyra laborationsmiljöer bestående av fyra operativsystem: Windows Server 2008 R2, Windows Server 2012, Windows 7 ochWindows 8. Sammanlagt har fyra tester utförts: Förstudie, Test 1, Test 2 och Test 3. Förstudien utfördes för att testa nätverksprestanda mellan två datorer. De andra testerna satte SMB 2.1 och SMB 3.0 på prov.I Test 1 ansågs SMB 3.0 prestera sämre än SMB 2.1, för att bekräfta resultaten kontaktades Jose Barreto på Microsoft.

This thesis for the Master of Science degree was performed at Solectron Corporation in Norrköping. The background for the thesis was a need to develop and build two test fixtures to automatize testing and adjusting of transmitter modules (TX-fixture) and receiver modules (RX-fixture) which are head devices in DWDM-systems. The basic elements for the test fixtures are: Test board, switch board and DC/DC board. The main function of the test board is to handle communication between the transmitter and receiver modules and supply voltage to these modules. The test board was insufficient and modified with a microprocessor to handle the communication between the PC and the receiver module.

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..