AbstractMotor sports have been around as long as motor vehicles have been. Sports are often seen as costly polluter but in the same time the motor sports have encourages a large part of development, both for vehicles and other industries. Inventions like rear mirror and ABS brakes come from motor sports. One way to once again drive development forward while making motor sports carbon-neutral is to run the race cars on hydrogen. In this thesis, the goal is to convert a spark ignition engine for hydrogen operation.

Möbius sequence is a rare condition where affected cranial nervesoften lead to speech deviations due to reduced oral motor functioning. Thisstudy aimed to survey speech deviations, compensatory strategies and selfperceptionof speech in seven people with Möbius sequence, and to linkthese to oral motor function and intelligibility. Additionally, the immediateeffects of smile surgery were investigated in one person. The abovementioneddomains were studied instrumentally, perceptually and throughstructured interviewing. All participants displayed reduced oral motorfunction.

Test bench for air bearingsThis thesis work consisted of bringing forward and defining the test parameters relevant for a test bench and constructing a test bench that can test and verify the largest existing air bearings that are of use in Micronic Laser Systems AB machines. Because the knowledge about air bearings is limited it is thought that with the help of the test bench the knowledge would increase and in that way improve the air bearings.After learning more about air bearings and their purpose at Micronic Laser Systems AB, I started the concept phase for the test bench. For each part in the test bench I consulted my two tutors, Torbjörn Hedevärn and Johan Bergqvist, at Micronic Laser Systems AB. The final concepts where documented as 3D-modells in Solidworks and some of them have been tested in Solidworks FEM-program.The test bench is designed so that, with the help of a pneumatic cylinder, 25 kilo weights are placed on the air bearing to test its stiffness, damping and the pressure performance under its surface area. To test these parameters the test bench has to have a pressure meter, accelerometer and a microcator.

This paper investigates the usability of the intelligence test Wechsler Nonverbal Scale of Ability (WNV). Twenty four children in two different age-groups were tested with WNV, 10 children between ages 5 - 6, and 14 children between ages 9 - 10. The WNV turned out to be a useful test when some verbal communication was used in the test situation. This was especially apparent among the younger children, who needed extra verbal instructions and verbal support through the different subtests. The test also contained standardized verbal instructions for all ages.

A personality test is a useful tool in recruitment contexts. Studies have shown that participants distort their answers in a socially desirable manner. The purpose of this study was to investigate if people respond more or less socially desirable depending on how they rate themselves in a personality test, based on the "big five" personality dimensions.Eighty people, (40 women and 40 men), 19-42 years, (M= 24,1 SD= 3,76) rated themselves on a personality test. Group one, (20 women and 20 men) completed the test on paper. Group two, (20 women and 20 men) completed the test verbally.

This is a study of the national test in 3rd grade. The national test is obligatory and is conducted in 5th and 9th grade, but since the spring of 2009 the tests also become mandatory in 3rd grade. The case study of this research is to find out how children in 3rd grade perceive the purpose of the national test. The survey should also clarify how students think and feel about the national test, and how they feel before the national test and after they have finished writing the test. Has the test positive or negative influence on children? The survey will also show how much teachers clarify what the significance of the national test is for the students.

Examensarbete har utförts på Atlas Copco Tools and Assembly system. Syftet var att utveckla ettkonstruktionshjälpmedel för att underlätta valet av elmotor och växellåda vid nyutveckling avautomatiserade skruvdragarsystem. Ofta görs valet av växellåda och elmotor individuellt vilketkan resultera i ett icke optimalt system. Genom att istället göra valen tillsammans kan ett bättreresultat uppnås.Syftet med examensarbetet var att ta fram ett Matlab- script som ger en bild över hur valet avväxellåda och motor påverkar varandra. Scriptet ska föreslå lämpliga dimensioner på motor ochväxellåda med hänsyn till hela systemet och dess uppgift.

BAE Systems Hägglunds has a long history of producing high performance terrain tracked vehicles (mostly for military applications), and they are now aiming at developing a tracked forwarder with similar techniques.The forwarder will be of series hybrid type where a diesel engine via a generator will power the motors (one for each drive wheel). Thanks to individually controlled motors and the gentle rubber tracks, this forwarder is calculated to have a considerably higher average speed in the terrain and to be more gentle to the soil. The forwarder with a weight of 11 metric tons and a load capacity of 15 metric tons is specified to have an average working speed of 7-10 km/h, a top speed in terrain of 15 km/h and a top speed on roads of 40 km/h.This master?s thesis aims at developing a conceptual design of the forwarder?s drive module which includes electric motor, gear unit, brake and drive wheel.To investigate if the requirements can be fulfilled a study of the dimensioning loading scenarios has been carried out. The resulting needs regarding the torque has been considered in order to determine the required gear ratios for different motor options.

Examensarbetets syfte var att konstruera en reglermekanism till en HCCI-motor. HCCImotornär en motkolvsmotor med variabel kompression. En motkolvsmotor är i teorinbättre än en vanlig motor på grund av att det går att utvinna arbetet från förbränningen itvå riktningar, värmen verkar på två ytor istället för en. Huvudproblemet med dettaexamensarbete har varit att uppskatta de krafter som verkar i systemet, samt att utvecklaett enkelt sätt att reglera fasen mellan vevaxlarna. Beräkningen av de krafter somuppkommer i reglermekanismen är komplicerad på grund av att mekanismen rör sigunder körning.

Att genomföra ett test som alltid ger samma resultat kan i längden kännas omotiverat. Strauss test är ett test som funnits länge för att testa stålets känslighet mot interkristallin korrosion. I detta arbete har Strauss test utvärderats i syftet att få fram ett underlag som kan användas för att starta diskussioner om en förändring i provningsmetodiken. Anledningen till att en förändring behövs är att alla dessa, ej informativa, tester kostar pengar. För att få fram underlaget har en litteraturstudie och experiment genomförts.

This bachelor thesis includes two different manuals and design of an interface box between a test object and a general test station (computer) with ARINC429 communication.There are three different purposes with this project:The first is to setup a general test station with ARINC429 communication using a communications card from DDC (DD-42916i3-300) and software from Ampol Technologies (dataSIMS).The second is to design a new interface between the test computer and the test object. As well as implementing two components in the equipment.The third is to write two separate manuals to guide the users of this equipment. There are two different kinds of users of this equipment, technicians and system engineers. Technicians use the equipment to test and repair flight components. System engineers will implement new components in the equipment.The result of this project is a working test station with a new interface and two manuals..

Hydropower is the largest renewable energy source available in today's society. Operation and production is handled by high-tech electronics. This thesis is done on behalf of Statkraft Sweden AB who wants to explore the possibility of replacing the hydraulic cylinder with an electric actuator, generally as well as a case of a small power station on the river Nissan. Whether it is the chaplain or francis turbine vanes are actuated by hydraulic cylinders. Because of Gustavsberg hydropower is inconstant operation, this report is based on power calculations, which are read and computed according to the available hydraulic diagram.

Syfte: att undersöka om resultatet vid 6-minuters gångtest (6MWT) påverkades av ökad grad av uppmuntran.Metod: 30 friska personer ?60 år rekryterades via bekvämlighetsurval. Alla testpersoner genomförde tre 6MWT. Första testet var en försöksomgång. Ett test (test A) utfördes med standardiserad uppmuntran enligt American Thoracic Society(ATS).

The purpose of this master thesis is to construct a steering transmission, for a trackedvehicle, containing two hydraulic circuits which are connected. The steeringtransmission should be mechanical to avoid steer-by-wire.BAE Systems Hägglunds has in an earlier study examined a system with two hydraulicpumps and one hydraulic motor, but the safety of the system wasn?t sufficient.To achieve sufficient redundancy there must be two hydraulic motors, which arecontrolled separately. When the two systems are connected in one point, this point is acritical part of the system because it directly affects both circuits. If one of the hydrauliccircuits fails the other should be able to operate independently as a steeringtransmission.

Swedish school children exhibit deteriorating knowledge results in terms of reading comprehension. Previous research shows that a method to increase the level of knowledge is the use of evidence-based learning techniques. Test based learning generates what is commonly referred to as a test effect, which proved to strengthen the relationship between learning and memory, as well as being applicable to various test formats. The purpose of this study was to investigate whether test based learning, in terms of learning english words leads to increased performance in a reading comprehension test, more specifically a cloze test. The study was based on a within-group design and was conducted three times over four weeks.