AbstractStudents at Mälardalen University have long performed their lab on a small turbojet engine in the course Aircraft Engine Technology. Since 2011, the engine has been dysfunctional. This was due to lack of maintenance. Since the lab has been an important element in teaching, the University had decided to get the engine functional again. This thesis project has been a request of Mälardalen University.The task we were assigned to was:1.

This work is an experimental study where knock sensor placements are investigated using engine tests. The aim is to studythe quality of the signal from knock sensors and how the signal for engine control is affected at different sensor locations on Scanias, engine DC13. To find out at witch position on the engine youcan get a usable signal for engine control, the engine is running while the knock sensors with advanced measurement equipment is connected to the engine. Evaluation of signals from the knock sensors are made in the computer program Matlab. The program is producing a seriesof plots, from these plots it is visually possible to draw conclusions and find connections.

Syftet med undersökningen var att försöka definiera vad sjömanseleverna i årskurs 2 och 3 på gymnasiet hade för framtidsplaner när det gällde fortsatt arbete till sjöss som matros, motorman. Dessutom undersöktes hur många som planerade att läsa vidare till sjökapten eller sjöingenjör, samt hur stort intresset av att söka arbete utomlands var bland eleverna. Undersökningen byggde på en kvantitativ metod där resultatet baserades på enkätsvar från fyra olika skolor och totalt 114 svarande elever. Intresset för att fortsätta arbeta som matros var något större än att arbeta som motorman. Majoriteten av de tillfrågade eleverna planerade vidare studier medan endast ett fåtal av de tillfrågade planerade att enbart fortsätta arbeta som matros och motorman.

The engine of JAS 39 Gripen, RM12, has recently been equipped with a new flameholder and a new engine inlet. This change has caused an increased noise level from the engine when the afterburner is in use. The noise level reaches its peak when the afterburner is partially used. The problem is thought to be unstable combustion in the regions around the flameholder. A solution to the problem has been proposed by Volvo Aero.

This qualitative study is about the individual supportive conversation with the school welfare officer in upper secondary school. The main aim of the study was to find out what the pupils get out of a series of conversations with the school welfare officer and what it means for the pupils that the welfare officer belongs to the school organization. Six qualitative interviews were held with pupils who had conversation contact with the school welfare officer during their time at upper secondary school.I found that these pupils and welfare officers were oriented towards change and solutions. I found that the most important thing for the pupils was to achieve a good and trusting relationship with the welfare officer. After this the pupil starts a process of change in cooperation with the welfare officer, with the aim that the pupil should be happy and satisfied with the current life situation.

This paper examines whether the American officer?s education at West Point and the Swedish officer?s education at the Military Academy Karlberg have adapted their history of the military art education in accordance to the new requirements of the Armed Forces and its focus on the operational defense. Sweden is evolving towards an operational defense and so is the United States. This in turn requires that training and education keep up with the changes. The National Defense College in Sweden do not focus the teaching of advanced history, which happened beforet he invention of the engine, in the officer?s training program, while the American education is rather advanced, with special focus on events taken place in the 19th century up to the Cold War.

The actual project presents the development of a testing rig for a steam engine. A short overviewabout the development of steam engines is presented, until arriving to the development of thepresent engine, which will require to be tested in different ways.The testing rig studied on this project (based on a Lanchester engine) will be used to testdifferent materials and layouts for the group Piston-Cylinder.The engine is a high performance steam power engine, which is going to have a highpower/dimensions ratio, what will lead to require high performance components and materials.An introduction to the testing rig is presented, and the entire design project is done in order toreplace the disappeared documentation of the current testing rig, built on the 1970?s. Also somemodifications done in the original testing rig are presented, as well as some detected problemsand their possible solutions..

In this master thesis, which is made in a qualitative manner, we have as purpose to investigate the nurses' estimation of the hospital welfare officer. We find it interesting to take a closer look at their opinion, because of our earlier, bachelor thesis, based on the same subject, only then in the welfare officer´s perspective on themselves. We have interviewed ten nurses and our questions at issue were the following four: Where in the hospital´s hierarchy do the nurses place the welfare officer? In what way do the nurses look at themselves and on the fact that they are leagally authorized? How do the nurses define the welfare officer´s occupational sphere and his part of the medical care? Which opinion do the nurses have on the co-operation with the hospital welfare officer? The primary information, together with two maintheories and a collection of litterature on the subject have helped us to answer the four questions of issue. We have found that the results we see, in some ways are compareable to our first investigation.

EPiServer is a content management system where users can publish information on a website by using a web browser. EPiServer has a built-in search engine that is very simple. Many customers using EPiServer web publishing system is in need of more functionality than is offered by EPiServer's built-in search engine. The purpose of this thesis is to develop additional functionality extends that the built-in search engine in EPiServer. The assignment was also to identify what need to be developed in order to give customers a better  opportunity to help their visitors find the right information on their website.Since this thesis was started in 2005, a number of commercial search engine productsentered  the market and it has become more common for companies to invest inthese products instead of using the simple search engine that's built into EPiServer.These products have many of the features that have been developed in this thesis.Another crucial difference between EPiServer?s built in engine and other products isthe method used to index content.

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 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.

The combustion engines in today?s vehicles are getting more and more advanced and there are increasing demands on that the engines should operate during optimal conditions. Examples of internal combustion engine parameters which may be carefully controlled are the rate between fuel and air, that this gas mixture is homogenous enough and that it is ignited at the correct moment. Moreover, the requirements of these parameters vary depending on, among other, engine speed and load. To meet these requirements in all occurring operation conditions, it is required that many subsystems work together.

This bachelor thesis aimed to explore, in a qualitative manner, the relationship and the interaction between the hospital welfare officer and the rest of the nursing staff. We chose this subject because we wanted to explain the phenomena of being a medical outsider in the nursing team. Our questions at issue were the following three: How does the hospital welfare officer define his occupational sphere and how do the rest of the nursing staff define it, according to the welfare officer himself? Is the welfare officer's relation to his own professional role and to the rest of the nursing staff affected by where his office is placed - secluded from or within the clinic? How does the welfare officer himself value his profession in relation to the rest of the nursing crew? To answer these questions we interviewed eight welfare officers, placed in two different hospitals. We used three different theories to explain the primary information.

EPiServer is a content management system where users can publish information on a website by using a web browser. EPiServer has a built-in search engine that is very simple. Many customers using EPiServer web publishing system is in need of more functionality than is offered by EPiServer's built-in search engine. The purpose of this thesis is to develop additional functionality extends that the built-in search engine in EPiServer. The assignment was also to identify what need to be developed in order to give customers a better  opportunity to help their visitors find the right information on their website.Since this thesis was started in 2005, a number of commercial search engine productsentered  the market and it has become more common for companies to invest inthese products instead of using the simple search engine that's built into EPiServer.These products have many of the features that have been developed in this thesis.Another crucial difference between EPiServer?s built in engine and other products isthe method used to index content.

This project was a collaboration with Kajsa Bergström. The projected was to develop the French/English deck of cards. We replaced the knight, queen and king with the numbers 11, 12 and 13. We worked with separate aesthetics and solutions after making that common change. I worked on an idea on how to make the cards look slim, by adapting a handcrafted look, full of details.