This thesis deals with the numerical 3D simulation of a four stroke, spark-ignited, internalcombustion engine, which is mounted on a high performance motorcycle. The work, carried outin collaboration with Politecnico di Milano and MV Agusta, focuses on the simulation of theintake, compression and expansion stroke, including combustion simulation, using an opensource CFD code.Simulation of internal combustion engines offers a great challenge in the field of CFD research.Moving boundaries of the solution domain, caused by the motion of the piston and valves, leadsto deformation of the computational grid, with decreasing quality of the solution as result. Basedon this, a previously developed mesh motion strategy was employed where a number of meshesare used to cover the whole simulation cycle. Within each mesh interval the internal cell pointsof the mesh are moved to account for the boundary motion of the piston and valves. This strategywas previously applied to simplified geometries as well as real engine geometries.

Regulations on the exhaust emissions of HD-diesel engines are becoming more and more stringent, and therefore, emission after-treatment systems are commonly used. These systems rely on catalytic conversion of NOx,CO , and HC emissions, and are thus dependant on temperature. At low load of the engine, exhaust temperatures are not sufficient for the after-treatment components. Therefore, means to increase the exhaust temperature while maintaining low emissions and fuel consumption are needed.The focus of this project has been to develop strategies for the lift profiles of exhaust and intake valves in the engine, with the goal to raise exhaust temperature in combination with low emissions and fuel consumption. The strategies have been tested in a single-cylinder research engine equipped with a hydraulic variable valve actuation system.

This paper is a literature study on search engine optimization (SEO) considering the leader of the search engine market: Google. There´s an introductory background description of Google and its methods of  crawling the Internet and indexing the web pages, along with a brief review of the famous PageRank algorithm. The purpose of this paper is to describe the major important methods for improved rankings on Google´s result lists. These methods could be categorized as on-page methods tied to the website to be optimized or off-page methods that are external to the website such as link development. Furthermore the most common unethical methods are described, known as ?black hat?, which is the secondary purpose of the text.

As emission legislations across the world continuously pushes engine development forward,engineers constantly need to come up with and implement fuel saving technologies. During thelast decade, variable cam phasing has become a popular solution to increase gas exchangeefficiency. This configuration is typically mechanically constrained by camshaft limitations, anda solution to circumvent this problem would be to use a different valve actuation principle.One example of this is to use pressurized air controlled by electrical solenoids. Such a systemhas been developed byCargine Engineering and this provides the starting point for this work. Tobe able to operate the valvetrain on an actual engine, a control system is needed.

The purpose of this paper is to compare the three search engines Web of Science, Google Scholar and MEDLINE in regards of recovery efficiency and the overlap of relevant documents when it comes to information searching for academic purposes. Furthermore, it raises the question whether freely available search engines and licensed search engines are interchangeable with each other. The empirical data in this study were collected through searches conducted in the three search engines Web of Science, Google Scholar and MEDLINE. Twenty search queries were used and the first twenty retrieved documents for each query were examined for relevance using previously designed criteria. The documents were scored by a binary relevancy scale and thereafter a precision value for each search engine was calculated.

There have been significant changes in the agricultural sector during the past 20 years (Jordbruksverket, 2008). The development of today is towards deregulation and adaption to global market conditions. As farmers try to adapt to the changed and more competitive market conditions investments are often necessary (LRF Konsult et al, 2012). Loans to agriculture and forestry businesses have increased to record levels and debt has doubled over the past years. The financial turbulence of the past years has contributed to an increase of the meaningfulness and willingness of the banks to be able to understand and handle risks associated with agriculture and forestry (Breiding, 2010).

AbstractIt is important to choose which spare parts to keep in stock. With the right spareparts in stock the costs for inventory and production loss will decrease. Cavalieri et al. (2008) highlights that the balance between inventory cost and production loss is underestimated.  It affects the company and must be considered before decision on purchase.The problem with spare engines is that they are all more or less critical for the production. That can be a reason for why no previous research targeting engines and classification of with engine should be kept in stock has been found.

Handlingsplan ingår i det systematiska arbetsmiljöarbetet. Det systematiska arbetsmiljöarbetet ska finnas på alla svenska arbetsplatser. Handlingsplanen är ett dokument där mål och strategier som företagen ska följa upp gås igenom..

Author: Linnea BrundellMentor: Gábor BoraCourse: Media and communication studies, C- level, advanced course. Communication, ethical and moral ? a survey based on news exposing companies which does not follow their own communication policies.Plot: In a leader in the newspaper Arbetarbladet, the writer says that the numbers of journalists are going to be reduced, while the numbers of informant officer are going to increase. Theory: The theory which has been used in the essay is Pierre Bourdieu´s field theories, Jürgen Habermas theories on representation and theories about the company?s values.Method: The method used in the essay is a qualitative text-analysis. The material in the essay is articles from the newspaper Svenska Dagbladet and Dagens Nyheter. Also two documentaries from the TV-show Kalla Fakta will be a part of the material. Adocument made by the trade union DIK, which tell about ethical guidelines for information officer, journalistic rules for their work are also a part of the material. Result: The survey shows that the companies have been failing to work after own policy documents. .

The aim of this study was to examine how children in the age of 5 are communicating in play at the preschool and how their fantasy games are different from each other. In this study, I have gained a greater insight on how to control children's imagination games.My approach has been the observation of three fun times where I also used me out of a voice recorder to record children's voices when their children are communicating with each other during the time of play at the preschool.The results of my study showed that children's fantasy games based on children's past experiences in which children use different themes and characters. The children's communication activities are different from each other. Children have different themes but the deck is based on imagination and communication.Fantasy games that children perform is rooted in the experiences that children get through to experience and see the reality.

The thesis work has been carried out at Volvo Aero Corporation (VAC) in Trollhättan. VAC has entered a partnership as developing and producing partner with engine manufacturer Pratt & Whitney and is currently at the starting phase of producing the turbine rear frame (TEC) to the engine PW1000.The purpose of this study was to create a report on process level that describes the conditions and the potential with PW1000 TEC to reach the product cost calculation taking into account lead times and describe alternative method solutions.The report describes a comparison between the present flow (2012), a flow based on product cost calculation (2016) and a potential flow (2016). The work has mainly been based on acquiring the knowledge and information available to inspect the present flow; this has been done by workshop observations, meetings and gathering of the information that is available on the work site for the PW1000 TEC.The information obtained has been merged into an Excel document, called Roadmap. It serves as a roadmap with current situation as the start and the potential flow for 2016 as the goal. With the roadmap as a tool, assumptions have been taken considering the flow and how it will change, where processes have been eliminated, reduced or marked as a problem..

This essay explores to what extent the Swedish language version of Google Images meets the usability requirements of average everyday users. Previously published studies on user behaviour and users? interface and search option preferences define the usability requirements, which are matched against Google Images? actual interface and search options. The retrieval method of Google Images is also briefly discussed, and users? opinions about Google Images too, as they come across in the previously published user studies.The findings are that Google Images lack some of the things that users ask for, but it still seems to be the most used image search engine among average internet users and more appreciated than other search engines.

Utifrån de ställda frågorna under rubriken syfte och frågeställningar sammanfattar jag nedan min studie. De resultat jag kommit fram till och som jag presenterat ovan är att geografiskt rekryterade krigarståndet sina officer- och underofficerare så nära geografiskt som det var möjligt. Tittar man på Upplands regemente rekryterades officer- och underofficerare främst från Uppland och Stockholm. Samma mönster återkommer hos Västgöta kavalleriregemente som var förlagt till Vänersborg. Den största rekryteringen skedde från Västra Götaland och i andra hand från övriga Götaland.På den sociala frågan, dvs vad fadern hade för yrke så dominerade de vars far också hade militär bakgrund rakt igenom hela min studie.

Control of a diesel engine equipped with Variable Geometry Turbine (VGT) and Exhaust Gas Recirculation (EGR) requires a multivariable control method. One problem is that the engine system is non-linear. Furthermore there are strong cross-connections between inputs and outputs and the inputs have alsoboundaries. To be able to manage these control problems, MPC has been used that is a multivariable method. The MPC-controller consists of an optimization problem and therefore MPC can find the optimum control signals in an easy way.

This study focuses the gendered relations of the Military Academy of Karlberg. More specific the study is investigating the experiences among young women and men cadets of suppression techniques. The purpose of the study is to get more knowledge about the work climate and suppression techniques at the officers? training program 2007/2010. The research questions employed for the study were:- Do the women and men officer students/cadets have any experiences of master suppressiontechniques at the officers? training program?- What kind of master suppression techniques occur at the officer?s training program?- What kind of master suppression techniques do women experience?- What kind of master suppression techniques do men experience?The study is a survey and data were retrieved by a questionnaire sent out to the participants.