This report summarize what have been done during the Master of Science Thesis that Klas Schjelderup has written for the company RANOTOR Utvecklings AB. The company is developing modern steam engines and this work should develop a machine to perform tests on a new type of piston seal that hopefully could be used in the future. The steam engines will be both volumetric and energy compact, around 1600hp/literof cylinder volume, and it will have a lot of practical applications.The new type of piston seal is hydrostatic lubricated which means that a fluid is separating two faces that normally is in contact. In this case pressurized water is used to separate the piston seal from the cylinder wall. RANOTOR have earlier formulated that at least the expander in the modern steam engine have to be oil-free, due to other components functionality in the closed water system.

Francisella tularensis, the causative agent of the zoonotic disease tularaemia, is highly contagious and potentially fatal for a wide range of wildlife species of the northern hemisphere, also humans. Although recognized as a pathogen for over 100 years, much still remains to be elucidated concerning the ecology and transmission of the bacterium, hence this literature overview aims at compiling data regarding the aquatic association and the role of mosquitoes in transmission of Francisella tularensis subspecies holartica, the sole subspecies in Sweden. While a linkage between the bacterium and natural waters stands beyond dispute, there is no consensus in the literature concerning its potential as a reservoir. However, two prevailing theories can be distinguished; one proposes the water association being mammaldependent and thus merely the result of contamination from semi-aquatic mammals living in close vicinity to the water source. The other, quite contrary, suggests mammal-independence and hence that water, possibly in association with protozoa, serves as an environmental reservoir for the bacterium.

AbstractThe purpose of this study is to examine whether the individual influence at the working place leads to the perception of decreased stress. Also I looked at whether stress and individual influence is affected by the employees age, sex or employment years. Previous research shows that individual influence decreases stress but strangely enough do the research show that individual influence seem to decrease in today?s work environment. This research is quantitative with questionnaires, answered by 74 civil servants working in a department in the municipality of Karlstad.

Research has concluded that meaningless differentiation with trivial attributes sometimes can be a successful strategy. However, the effect varies with respect to certain aspects such as the price of the product and the decision context. How the characteristics of the consumer influence the effect of trivial attributes has until now been unknown. This thesis investigates how the consumer?s level of knowledge and personal involvement influence the effects of trivial attributes on product preferences and product attitudes.

The main purpose of this Master?s thesis is to develop an understanding of why non-users do not use public libraries by studying their information and culture habits and their relationship to public libraries. One of the motivating factors behind this choice is the lack of earlier research on the subject, particularly qualitative research. The theoretical framework is stratified into three associated levels with Brenda Dervin?s sense-making theory on an individual level, Marianne Andersson?s and Dorte Skot-Hansen?s model of the roles of public libraries on an institutional level and Pierre Bourdieu?s theoretical apparatus on a social level.

This thesis is about practising on a different level to get an insight to what techniques might work for me as a double bass player. It is about discovering how to use your brain into playing at your best level. I practised both talking and singing to myself and read a lot about thinking and hearing not only the music but every note before playing. The thesis idea came from not having a technique that worked for me while practising alone. I wondered why it is such a difference between what we do at the lessons and what I do when practising by myself..

During my practice as a teacher trainee at an upper secondary school it became clear to me that many pupils had difficulties with mathematics. I was surprised to find that many pupils seemed to get stuck on the level of attainment for the senior level of the nine-year compulsory school. As I have not studied anything about difficulties in Mathematics during my training to become a qualified teacher, I would like to get to know more about this.After studying research done on this subject I made the following approach to the problem:? What fields regarding Mathematics do the pupils themselves find most difficult?? What factors have been contributory causes to these problems?? What are the factors that have helped pupils with difficulties in Mathematics to reach the goals for the syllabuses in Mathematics?The answers to my questionnaire and interviews resulted in the following conclusions:? Pupils find theory of equation and conversion of units as most difficult at senior level of the nine-year compulsory school.? Teaching should be done in special instruction groups to give the pupil the opportunity to develop his/her skills on an individual level.? Pupils find it hard to deal with all moments in Mathematics during the time given for each course.? The pace for teaching Mathematics is too high according to the pupils.? Pupils wish for instructions on a lower level.? There is often a lack of contact between teacher and pupil.? The teacher should use more time to help the pupil receive good self-confidence and increase the motivation for instructions in Mathematics..

Every year, KTH participates in the Shell Eco Marathon, a competition whose goal is to design a vehicle that can go as far as possible using only the equivalent energy of one liter of petrol fuel. This year, one of KTH?s contributions to this race is the Agilis prototype; a car powered by a uniquely configured HCCI-engine developed at the university. The engine is dependent of several subsystems in order to work properly, among other, systems for cooling and lubrication.Combustion engines are in need of a cooling system that reduces the heat developed during the combustion. In general, two main types of cooling systems are employed; either air cooling, where the outside of the cylinder is exposed to a flow of the surrounding air, ore water cooling, where water flows in tubes around the engine, and the heat are transferred by the water to the surrounding air through a heat exchanger.The purpose of the lubrication system is to prevent the friction that builds up in the interference between moving parts in the engine.

In coastal wetlands carbon/organic matter can be stored for long periods of time thanks to, among other things, the presence of water which slows down the decomposition. Because of this, restauration and management of such habitats have the potential to decrease the emission of greenhouse gasses and help mitigate climate. Internationally these environments are called ?blue carbon? ecosystems. In Sweden, alder (Alnus glutinosa and Alnus incanata) covered wetlands along the coast is a nature type that potentially could function as a ?blue carbon? habitat.

On commission of the County administrative board in Värmland County a method was developed for analysis of the occurrence of artificial land use at lakes and watercourses. With artificial land use is meant land significantly affected by man. Two bases have been used to carry out the analysis. In one of the analysis the vegetation database and in the other GSD¹-Marktäckedata (land cover data) was used (this method has been used by County administrative board in Jönköping County).The analysis comprises all watercourses within Alsterälven river basin. The digital water bodies are created by the Swedish Meteorological and Hydrological Institute on the basis of GSD-Översiktskartan (general map).

The study has shown that retailers in the mid-price segment differentiate their brand through developing a strong company identity around the brand. The personality involves store atmosphere, merchandise and advertising. Larger companies have chosen to lay the responsibility on management level, which facilitates on store level. By controlling the strategies on a central level the company can make sure that the stores are steered in the direction that the company wants them to be steered in, and also that they follow the positioning-concept. The company can also devote its efforts to working with its core value, which is service.

In this bachelor essay an attempt is done, to recreate a probable Bronze Age landscape on Gotland, with GIS as a tool. The landscape on Gotland is situated with many different monuments dated Bronze Age, such as cairns and stone ships. In creating of the maps, two possible shorelines contemporary with the Bronze Age have been calculated and marked on the maps. Furthermore, peat lands have been drawn upon the maps, by using the information from geological maps.A landscape variable have been compared between Bronze Age places and Early Iron Age houses; the soil type. On Bronze Age places gravel is the most common, while moraine marl is the most common on places with Early Iron Age houses.From a selection that were made, all Bronze Age places where within 3 km from the water, either the recreated shoreline or peat land.

Headwater streams are affected by anthropogenic impacts at multiple scales. One aspect of human impact is sediment transport associated to the abundance of stream structures as large woody debris and the composition of the riparian zone from forest to agricultural landscapes. Riparian buffer zones and stream structures like dead wood are considered as generally important structures for protection against an increasing amount of sediment particles in the water. Hence, in this study these structures were quantified in thirty different stream segments on land and in the water. To measure the transport of sediment Whitlock-Vibert boxes were used in three different types of landscapes; forest, transition and fields. The boxes were left in the stream segments for three months, the taken up and dried and weighed. The results showed that the transition-land in Frösvidalsån had the highest sediment transport. The second highest transport of sediment was in Blackstaån at the fields.

During the migration season in 2013 a study on spawning migrating salmon and the effect of water flow on the behavior was conducted of the salmon at the Forshaga hydropower station in the River Klarälven. The River Klarälven with its nine hydropower plants on the Swedish side, constituting migration obstacles for the migrating salmon. Fortum Generation AB has together with the County Administrative Board restored a salmon trap at the lowermost hydropower station in Forshaga, aiming at making it possible for the salmon to swim into the trap, and thereafter be transported by truck past the power plants and then continue their journey to the spawning grounds on their own. Unfortunately, it is believed that the trap does not work as well as it should. In this study, I focused on salmon position in relation to water flow and if the number of salmon that swam into the fish trap differed between salmon with previous experience of the trap (experienced) and salmon without experience (unexperienced).

With a strong company culture an organisation has relationships with their clients on an organizational level rather than on an individual. This simplifies the ability to change team members in order to enforce creativity and keep clients on a long-term basis. In turn the final product/service improves, which creates long-term relationships. Additionally, relationships on a personal level due to social activities helps Solberg detect early warnings-signs of eventual dissatisfaction from the client?s point of view.