Future emission legislation puts great emphasis on increasing the efficiency of the engine, thereby reducing fuel consumption. The tribological contact between cylinder liner and piston ring is where an great amount of energy is lost due to friction, and by reducing these losses an reduction in fuel consumption can be achieved.The aim of this thesis was to evaluate the tested piston ring coatings against a plasma sprayed cylinder liner and rank these combinations of materials for friction and wear resistance. The coatings that were tested was Cr + Al2O3, (Al,Cr)N, two types of CrN and WC / C.The experimental tests were performed with a so-called pin-plate, where used oil with addition of an acidic mixture of sulfuric and nitric acid to mimic the acidic condensate formed when exhausts recirculate, were added with a continuous flow. The results were then analyzed by weighing, studies by optical microscopy and scanning electron microscopy (SEM) and profile measurements.The results from each material combination were that the plasma coated cylinder liner wears too aggressively in order to yield a ranking of the piston ring coatings based on the parameters of friction and wear resistance. It is therefore proposed that an alternative coating on the cylinder liner should be developed, lacking the large abrasive wear on piston rings and that can withstand the corrosive environment resulting in engines equipped with EGR.

This report relate a concept study that consider a number of different proposals to improve the overcharging system in BAE Systems Ha?gglunds tracked vehicle series BvS10, to maintain sealevel power at extreme altitude.At high altitude the power losses beacuase of the air density that decreases, which results in less fuel can be burned. The decreasing of air density also gives rise to fatigue failure of the turbocharger unless power is reduced.The proposals shall be as required by BAE Systems Ha?gglunds economically sustainable and defensible from a packing perspective. That means the selected solution must have a reasonable price tag and at the same time a minimal impact on adjacent components.The basis for this thesis is based on benchmarking of both the auto industry as the flight industry, to find inspiration and tips for improvement.Some of the concepts have after gathering facts and calculations been excluded while other solutions has been considered as workable and thus interesting for BAE Systems Ha?gglunds.Initially the current turbochargingsystem was analyzed in order to determine the starting point and thus be able to fix the current problems surrounding high altitude driving.

This thesis aims to discuss how an information system and its users may adapt to each other. The main discussion is how to create an information system that is adaptable without losing its organising properties. The thesis uses a holistic approach to the topic and the areas being dealt with are information architecture, interactive information retrieval and information searching. The practical work consisted of constructing a database for Autoliv?s Research and Development branch.

Simulation is a vital tool during development of JAS 39 Gripen, since money and time can be saved.The Auxiliary and Emergency Power System, AEPS, is a subsystem of the secondary power system in Gripen. It has the function of providing the aircraft with electrical and hydraulical power before activation and after deactivation of the main engine. The system also functions as backup in case of a safety critical problem in the main power supply system. The system basically consists of a control unit and an auxiliary gearbox. The gearbox is driven by an air turbine.

How does a social welfare officer know when a parent with mental illness or behavioral symptoms is harmful to the children? As a social you are confronted with different ethical dilemmas on a daily basis. The social welfare officers have to follow their own authorities, laws, guidelines and regulations while at the same time do everything to satisfy their clients? needs. This inconsistency can sometimes be difficult to handle.

Sedan kalla kriget har inte bara omvärlden och föreställningen av motståndaren förändrats utan även reglementenas utformning. I dagsläget används på kompaninivå ett reglemente för alla manöverkompanier, tidigare har det i försvarsmakten funnits reglementen för specifika typer av kompanier. Denna uppsats behandlar vilken påverkan detta har på tydligheten i reglementena.Arbetet syftar till att undersöka tydlighet i föreställningar om infanteriförbandens taktik på kompaninivå idag jämfört med under mitten av kalla kriget i två vägledande instruktioner. Detta för att diskutera artikulering av taktik och dess implikationer på officersutbildning inom försvarsmakten. Den metod som används är kvalitativ textanalys med en komparativ design.

In published studies it is found that the fuel consumption on a forwarder is relatively constant, on time basis. A certain variation between different sizes of forwarders occurs as well as between different working elements. The aim of the study was to establish a forwarders comparatively fuel consumption when driving on road and in the terrain, loaded and unloaded, with high and low gear and with high and low speed as well as with hydrostatic and hydrodynamic transmission. A hypothesis was that low rpm gives lower fuel consumption on distance basic, at all trials. The test driving was made with a Hemek 750 which is a three geared hydrostatic machine and with a Hemek 700 which is a hydrodynamic machine with six gears.

The visual representation of management (board of directors, chief executive officer and executive management) in annual reports is an area of scholarship that has not been explored much. In the present study a sample of 87 annual reports from business enterprises within a Swedish context, comprising about 300 photographs, was analyzed using an explorative method of analysis based on semiotics and grounded theory. The influence of the context on images raises a question discussed in the study: Should the photographs in the annual report be categorized as portraits, advertisements and others or should the annual report be regarded as a genre of its own? The photographs showed patterns of homogeneity regarding gender, dress, gestures, colours, pictorial compositions et cetera. The position of the (male) CEO is privileged, but he is also connected to the group through various means like dress and style, thereby further underscoring management as a male enterprise and demonstrating the importance of the suit and necktie in creating homosocial bonds.

AbstractThe purpose of this study is to explore how prison officers in Sweden manage their feelings in remand prisons versus inmates and colleagues. Due to changes in the prison officers occupational role and work environment we found it profoundly interesting to study how prison officers perceive and reflect on their emotion management, that relates to the work they perform. The prison officers occupational role includes tasks that corresponds with security work and rehabilitative labor towards inmates, this tend to create a complexity as the occupational role consists of contradictive tasks. They need to uphold safety by physical means simultaneously as they need to become more intimate with inmates to accomplish the rehabilitative tasks. The study proceeds with a qualitative inquiry with six interviews from three different remand prisons around Sweden.

This is a study about employment officers at the Swedish public employment service. The aim of this study was to examine how they understand and use their discretion in their daily work. We used a qualitative method and the data was gathered by semi-structured interviews with eight employment officers working at the same office in a small town in Sweden. Lipskys theory about street-level bureaucracy and Lazarus description of coping theory are applied to analyze the empirical data. The work for the Swedish employment officers have changed over the last years with an increasing focus on control and administration.

This is a final thesis done at BT, considering one of their forklift truck models called Reflex. The first part of this report is about a preliminary investigation investigating what kind of diagnostic systems BTwants to use, and also which demands there are to meet all expectations on such system. Secondly a diagnostic system, which will show if the drive wheel is worn out, will be presented. In the preliminary investigation, two kinds of diagnostic systems were mentioned. These were Model based diagnosis and Predictive analysis.

Future emission legislation puts great emphasis on increasing the efficiency of the engine, thereby reducing fuel consumption. The tribological contact between cylinder liner and piston ring is where an great amount of energy is lost due to friction, and by reducing these losses an reduction in fuel consumption can be achieved.The aim of this thesis was to evaluate the tested piston ring coatings against a plasma sprayed cylinder liner and rank these combinations of materials for friction and wear resistance. The coatings that were tested was Cr + Al2O3, (Al,Cr)N, two types of CrN and WC / C.The experimental tests were performed with a so-called pin-plate, where used oil with addition of an acidic mixture of sulfuric and nitric acid to mimic the acidic condensate formed when exhausts recirculate, were added with a continuous flow. The results were then analyzed by weighing, studies by optical microscopy and scanning electron microscopy (SEM) and profile measurements.The results from each material combination were that the plasma coated cylinder liner wears too aggressively in order to yield a ranking of the piston ring coatings based on the parameters of friction and wear resistance. It is therefore proposed that an alternative coating on the cylinder liner should be developed, lacking the large abrasive wear on piston rings and that can withstand the corrosive environment resulting in engines equipped with EGR.

The web is a constantly growing medium that presumably plays an increasing role in public library reference services. In order to provide high quality reference service the librarians need to be able to master this medium. Therefore it is interesting to get an understanding of how librarians actually use the web. The aim of this Master s thesis is to investigate what web search tools are used by public librarians in reference service. Furthermore, the aim is to get an understanding of how the librarians think about those tools and what background factors influence their selection of tools.

Många anhöriga till officerare som tjänstgjort i internationell insats har upplevt negativa fysiska och psykiska besvär under och efter insatsen. Men hur påverkar detta officeren när denne ska återgå till det ordinarie arbetet eller åka på nästa insats, sett från en psykosocial arbetsmiljöaspekt? Och förändras detta med anledning av de nya lagstadgade kraven om tjänstgö-ringsskyldighet och uppföljningsansvar? Detta handlar en del av studien om. Den andra delen av studien beskriver hur ett framtida anhörigstöd kan utformas, kopplat till de nya kraven.Studien syftar till att ge en ökad förståelse till att officer och anhöriga tillsammans utgör en ge-mensam social ordning och att ge underlag till fortsatt forskning. Vidare syftar studien till att bidra med konkreta förslag till anhörigstöd till myndigheter och organisationer som idag arbetar med det.Studiens empiri erhålls genom djupintervjuer med sex långvariga partner till officerare som kom-pletteras med textempiri.Studien påvisar att det finns tendens till ett meningssamband mellan anhörigas upplevda välbefin-nande och officerens psykosociala arbetsmiljö.

This essay examines the olfactory reading as a possible way to make sense of a fragmented novel, in this case Sara Stridsberg?s debut Happy Sally (2004). Through close reading, the essay identifies the source of the smells, who perceives it, and how this is portrayed in the text. The smell?s position in the text is understood in relation to Maurice Merleau-Ponty?s phenomenology, where the body, as created in the literary text, is considered as a source of knowledge.