This master thesis was a subtask of a project called EMIR-1. The goal with the thesis was tobuild a system for particulate mass measurements in one of the engine test cells at KTH. Theparticulate mass measurements are planned to be measured with a TEOM.The exhaust gases must first be diluted with air before the sample is sent to the TEOM.Therefore an ejector diluter for this matter also was designed and evaluated in the thesis.Emissions measurements have been done both with and without dilution to determine thedilution ratio. Tests have been done for different speeds and loads.Problems with stability of the dilution ratio have been an issue throughout the process andpressure pulsations in the exhaust pipe are believed to be the cause. More tests have to be done tomake sure that this is the problem.One idea is to make the inner diameter of the diluter nozzle smaller and see if it changes thedilution ratio stability.

The market for heavy duty engines is constantly requiring engines that should be more andmore powerful, while still maintaining low fuel consumption. As a result of increasing enginepower, the engine and coolant temperature increases as well due to insufficient coolingperformance (because of design issues, cost etc.).Also, emission legislations, both current and future, require more and more measures to betaken by engine manufacturers. One way of meeting the legislations is the use of cooled EGR(Exhaust Gas Recirculation), which also lead to increased coolant temperatures.Both these factors also naturally lead to increased engine oil temperatures, the consequencesof which are not thoroughly investigated.This thesis project aims to investigate effects of high temperatures on engine oil degradation,with focus on the greatest degradation process: oxidation. To do this several engine runs havebeen performed on a 310 hp engine with EGR to see what happens to the engine oil in a realengine when exposed to high temperatures. During the tests oil samples have been taken andanalysed for important parameters.As a complement to these engine tests some laboratory oxidation testing have also beenperformed, to be able to compare engine test data with laboratory tests.One goal of the project was to try to formulate an empirical oxidation model, which would beable to predict oil oxidation levels in an engine, given any running parameters.

Glulam is a product that was engineered to make use of timber in a more efficient way. Bychoosing timber of similar quality and discarding natural defects during production, thedevelopment of a stronger cross-section is achieved.Carbon fiber is a relatively new material with a high tension capacity. This feature is used toexamine how the bending capacity of the beams improve by adhering carbon fiber laminateson the lower edge of the beamsThe strength of the material is tested with three experiments: carbon fiber on the bottom of thebeam (a), carbon fiber attached to the lower sides of the beam (b) and carbon fiber in thebeam, covered with a layer of wood (c)The results show that the first case, where the carbon fiber is attached to the bottom of thebeam, gave the best result with an increase in capacity of 59 % compared to the nonreinforcedcontrol. The other two cases also show an improvement in capacity, beam-type 3had a capacity increase of 47% and beam-type 4 increased with 25 %Tests were also made with glulam beams reinforced with fiberglass, but these tests were notanalyzed in depth because the purpose was to compare the capacity to carbon fiber. Thisbeam improved its capacity by 40.3%.The tests show that carbon fiber as a reinforcement material for glulam is a good choice whenthere is a requirement for stronger cross-sections in both new production and renovation ofold buildings.

This study highlights the differences in articulation, nasality and intelligibility between twenty 16-year-olds and thirteen 19-year-olds born with isolated cleft palate and control groups. The test groups are compared in a longitudinal perspective and based on earlier evaluations of velopharyngeal impairment. Significant differences were found between test groups and control groups using quantitative comparisons based on SVenskt Artikulations- och Nasalitets-TEst and NasometerTM. The longitudinal comparison also showed a positive but not significant development of the speech. Differences emerged in the comparisons based on velopharyngeal impairment but no significance analysis was made.

The Swedish state and educational system are secular, so to say they do not depend on the former protestant state church anymore. Many people in Sweden are also secular. Even so, in school teachers meet students with a religious faith. The purpose of this study is to examine how teachers without a religious belonging experience the encounter with religious students. The method used was semistructured interviews with five teachers in a upper secondary school in a multicultural suburb of Stockholm.

We set out to compare two different categories of workers: the, so called, white- and blue collar workers. The studies aim was to measure if there were any observable differences between the two in means of optimism and sense of coherence. There are two tools created for measuring optimism and sense of coherence, the Life Orientation Test ? Revised (LOT-R) measures an individual?s level of optimism and Aaron Antonovsky devised a test for measuring an individual?s level of sense of coherence (SOC). Optimism is best explained like a way to measure anticipation, how an individual expect future events to fall out.

This report present a working model for simulation of what happens to colors displayed on screens when they are observed through optical filters. The results of the model can be used to visually, on one screen, simulate another screen with an applied optical filter. The model can also produce CIE color difference values for the simulated screen colors. The model is data driven and requires spectral measurements for at least the screen to be simulated and the physical filters that will be used. The model is divided into three separate modules or steps where each of the modules can be easily replaced by alternative implementations or solutions.

In this two years master?s thesis I examine the library?s representation of research and its influence upon the relationship between the library practice and the research practice. I also intend to find out what controls the representation and if it is possible to see changes in the representation over time. My source material has been texts published in the Swedish library journal ? and social domain ? Biblioteksbladet during the last decennium (2001?2011).

ResuméDer er en løbende konflikt mellem ytringsfrihed og racistiske krænkelser i dagens samfund. I Danmark er der en del nationale såvel som internationale forpligtelser, som indebærer at samfundet skal bekæmpe racismen, hvilket nødvendiggør indskrænkninger i ytringsfriheden. Dette gøres fremmest gennem Straffelovens § 266 b.Ved at sammenligne Danmark med Sverige ser man mange ligheder imellem de to lande lovmæssigt. Der er derimod en markant forskel i den måde racismen manifisterer sig på i de to lande. Der er videre forskel på i hvor høj grad de to lande vægter statens rolle - og hvilken fremgangsmåde de anvender i bekæmpelsen af racisme.Den bedste løsning bliver at lade domstolene definere de yderste grænser mellem ytringsfriheden og racistiske krænkelser, samtidigt med at samfundet gennem samspil mellem forskellige faggrupper, fastslår at racistiske fordomme bygger på urigtige grunde.

This essay covers the subject of children with language disorders. We are two educators writing an experience-based essay on our preschool experiences and the literature with the subject of speaking disorders and verbal development. The main focus of this essay is how educators can recognize and stimulate children with language disorder. The starting point in the essay is two experience-based events from preschool which tells of two different boys, aged three and four. Both boys have some kind of verbal disorder and one of them also has Down´s syndrome.

More than 1000 Swedish Warmblood foals are shown every year at foal inspections which are arranged around the country. Six traits are evaluated at these inspections: type, head-neck-body, correctness of legs, walk, trot and canter. No previous genetic studies have been done on the data from these evaluations. The purpose of this study was to do genetic analyses of the traits which are evaluated at foal inspections. The purpose was also to see if there are any correlations between the results of the foal inspections and the results from the tests of three-year-old horses.

Studien riktar sig främst till audionomer, och andra med intresse av hörselrehabilitering.Auditiv deprivering kan visa sig som en med tiden försämrad taluppfattning i örat som inte fått adekvat stimulering. Vad som karaktäriserar dem som drabbas är inte klarlagt. Inte heller vet man exakt orsak eller tidsförlopp. Genom att hörapparatanpassa det drabbade örat har effekten kunnat reduceras och i vissa fall har fullständig återhämtning konstaterats.Litteraturstudiens syfte var att belysa fenomenet och aspekter som bör beaktas i audionomens arbete med insatser av både förebyggande och rehabiliterande karaktär. Metoden var att granska artiklar framtagna genom systematisk och manuell sökning, i databaser tillgängliga genom Örebro universi¬tet.Resultatet visar att personer med hörselnedsättning av såväl sensorineural som konduktiv art drabbas.

In the last decades, high speed cutting has become an attractive technology in the wood industry. The possibility of reducing global costs in addiction with an increase in productivity, were the main reasons for the enlargement of the use of this technology. As usual, these advantages are accompanied by disadvantages that should be carefully analyzed. If on the one hand cutting forces are reduced with increasing cutting speeds, on the other hand, the centrifugal forces affecting the tool are higher. Exposed to such high loads, there is a considerable risk of tool failure that embeds hazards for both machine and workers.

Environment friendly transports are one of the main topics in the industry and society today.Shell organizes an annual university competition called Shell Eco Marathon. The goal is to buildthe car that consumes the least fuel during a race. KTH participated for the first time in 2006.The engine for this competition, DoubleTwo, has been developed within the school. Theprinciple is a two stroke counter piston HCCI engine with variable compression ratio. HCCIstands for homogenous charge compression ignition.

The Swedish state and educational system are secular, so to say they do not depend on the former protestant state church anymore. Many people in Sweden are also secular. Even so, in school teachers meet students with a religious faith. The purpose of this study is to examine how teachers without a religious belonging experience the encounter with religious students. The method used was semistructured interviews with five teachers in a upper secondary school in a multicultural suburb of Stockholm.