Test bench for air bearingsThis thesis work consisted of bringing forward and defining the test parameters relevant for a test bench and constructing a test bench that can test and verify the largest existing air bearings that are of use in Micronic Laser Systems AB machines. Because the knowledge about air bearings is limited it is thought that with the help of the test bench the knowledge would increase and in that way improve the air bearings.After learning more about air bearings and their purpose at Micronic Laser Systems AB, I started the concept phase for the test bench. For each part in the test bench I consulted my two tutors, Torbjörn Hedevärn and Johan Bergqvist, at Micronic Laser Systems AB. The final concepts where documented as 3D-modells in Solidworks and some of them have been tested in Solidworks FEM-program.The test bench is designed so that, with the help of a pneumatic cylinder, 25 kilo weights are placed on the air bearing to test its stiffness, damping and the pressure performance under its surface area. To test these parameters the test bench has to have a pressure meter, accelerometer and a microcator.

This report analyzes and examines a hypothesis for finding a method to optimize thelength of the delubrication process time based on a total charge weight. The work hasfocused on the holding time for delubrication and the total charge weight.An important step in the manufacturing chain of cutting tools is when the greenbodies undergo the sintering process. Today, the delubrication step has the sameprocess time independent of the total charge weight. An implementation of a methodto adjust the delubrication process time would give more consistent quality of thecutting tool´s internal characteristics but also reduce the time course of the sinteringprocess. In the present project two methods for this goal were tested, thedevelopment of an algorithm and a weight interval subdivision with associateddelubrication process times.During delubrication a pressure increase is observed due to the decomposition of thePEG in the powder mixture.

The main aim of the study was to examine the importance of organizational climate for affective job-related wellbeing. A further aim was to investigate potential differences in employee level in the experience of organizational climate and wellbeing. Another purpose was to see if there was agreement in the view of the organizational climate among the employees. Questionnaires were collected from 44 employees at a chain store. Results showed that Integration, Involvement, Supervisory Support, Training, Welfare, Innovation and Flexibility, Goal Clarity, Efficiency, Effort, Performance Feedback, Pressure to Produce and Quality had a great influence on Enthusiasm but only Pressure to Produce and Welfare correlated with Anxiety.

Wildlife is a valuable and renewable resource that promotes economical, ecological and social values. These values are important for developing and maintaining many rural societies. However, growing ungulate populations have led to increased browsing pressure on valuable forest trees and crops. Previous studies have proposed supplementary feeding and gamefields as potential methods for controlling the ungulate foraging and reducing browsing damage by providing other attractive food resources. However, quantitative estimates of potential biomass production of various gamefield crops and browsing pressure on the surrounding forest have been lacking.

Since prehistoric time man has used wood to build their environment. The material?s availabilitycombined with its good mechanical properties has often made it the material of choice. Like allmaterials exposed to natures degradative processes the properties of wood decreases over time.Rot, UV radiation and attacks by insects and pests damage wood if not protected. Since we wantwhat we build to consist, optimizing our building materials durability is of great interest.Techniques and methods for increasing the endurance of wood have been developed in severaldifferent places and for a long time.

ABB Motors and Generators manufacture large AC machines with oil lubricated plainbearings. The machines have occasional problems with oil leakage from the bearings. aproblem that ABB wants to be solved.In this thesis the cause of this leakage were investigated, with focus on the bearingseals.The purpose of this work was also to suggest amndments for preventing thisproblem. , and to suggest improvements that can prevent this. The first step was todo a literature survey of earlier work on this problem, study the theory ofhydrodynamic bearings and different types of seals and their properties.

AbstractWith increasing population and increasing demands for comfort and thus an increase in energy demand, it is necessary to examine various energy-efficiency measures. This work deals with the ability to control the flow through the heating system to achieve the desired comfort with as little energy as possibleA heating system contains of different parts, roughly speaking, you can divide it to three main components: Heat source, Distribution and Heat emitters. All components are working together to bring heat to the building. What is examined in this report are different ways of adjusting the flow and supply temperature and how it affects comfort and energy use in a building.At today ?s date the conventional method is to use a high flow through the heating system, which affects pressure drop and cooling of the fluid.

Background and purpose: Volleyball requires a lot of the human body, andeffective core stability is necessary for the athlete. Our muscles cooperate as achain of motions and core stabilization is the base for the moving muscles.The most well-known stabilization muscle is m.transversus abdominis (TrA).The purpose of the present study was to evaluate the function of TrA inSwedish female elite volleyball players and to observe the influence of eightweeks of stabilization exercise on the TrA. Method: 10 female elitevolleyball players (mean age 24,7 years, range 18-31 years) participated inthe study. TrA was measured in supine position with a pressure biofeedbackunit. Subjects were instructed to draw in the abdominal wall without movingthe pelvis and hold for 10 seconds.

Adaptivt kamouflage är en signaturanpassningsteknik som ger stridsfordon förmågan att anpassa sin värmesignatur utefter omgivningen eller imitera andra objekts signatur, i syfte att undgå upptäckt eller identifiering.I denna studie genomförs en analys om vilka folkrättsliga problem som kan uppstå vid användandet av adaptivt kamouflage.Studiens resultat visar att de folkrättsliga problem som kan uppstå vid användningen av adaptivt kamouflage är distinktionsproblem, då tekniken möjliggör för stridsfordon att imitera signaturen av civila personbilar. Denna användning av adaptivt kamouflage kan anses som brott mot distinktionsprincipen..

When building a house or similar the stress on the ground increases and deformations can arise. The deformations create a foundation that the building is not constructed for and damages on the building arise. The increased stress on the ground can be derived back to the building, but it is possible that the increased stress may well derive from different sources such as other buildings or trees.       The building is an older property, built in the late 19th century alternatively early 20th century, and is today used for rental housing and has suffered severe damages due to subsidence. The goal of the thesis is to find possible causes for these subsidences. The thesis was executed as a combination between literature- and casestudie. After careful studies it has been found that a probable cause for these subsidences is trees. Through field- and lab studies it has been found that the trees has effected the ground through there accumulation of water.

Introduktion: Olika typer av sår skapar stort lidande för den drabbade och Negative Pressure Wound Therapy (NPWT) är en behandlingsmetod som utvecklats för att effektivisera sårläkningsprocessen. Livskvaliteten och hälsan påverkas av såret och dess utveckling, vilket gör omvårdnaden vid sårbehandling grundläggande för patientens välmående. Syfte: Syftet var att belysa hur Negative Pressure Wound Therapy påverkar patientens livskvalitet och hälsa. Metod: Polit och Beck (2012) niostegsmodell användes för litteraturstudien. Artikelsökningarna gjordes i två olika databaser samt manuella sökningar och resultatet grundades på tolv artiklar som genomgick en kvalitetsgranskning.

In this essay, I have interviewed six young women about their views on body image and how their views are affected by their surroundings, massmedia and social media. Also the relationship between body image and eating disorders is relevant in this context and has a part in the study. The purpose of this study is to build an understanding of how young women relate to the body ideal that exists around them. Theoretical auxiliary tools used are George Herbert Mead's theory of the generalized other, Erving Goffman's theory of dramaturgical perspective and impression management, and Du Bois's theory of double consciousness. I have also used two scientific articles to get a deeper understanding of the subject.

The exhaust arrangement on a Scania V8 consists of one manifold at each bank connected to a twin entry turbine (8-2-2). A study in GT-Power has shown improved performance and reduced cylinder to cylinder variations using two manifolds at each bank in combination with a single entry turbine (8-4-1). This thesis work analyses the difference in performance shown in simulation and verify it by engine test.The initial work was focused on simulation in GT-Power. Investigating how exhaust manifold volume and pulses effects the turbine efficiency and the mean effective pressure during the gas exchange. To verify GT-Power simulations four engine tests with different exhaust arrangement have been made.The results from GT-Power simulation indicate that a larger exhaust volume improve the turbine efficiency.

The purpose of this paper is to analyze the driving forces and barriers which may exist at the implementation of green supply chain management (GSCM) within public organizations. Suggestions that may increase or reduce driving forces and barriers to public activities will also be provided, where such is found. The background of the study is that the public sector is such a major customer for many companies / providers, which makes the sector able to highly affect its suppliers. This essay is based on literature studies. The results showed that GSCM is a relatively unexplored area, especially applied on the public sector.

To reduce emissions of carbon dioxide (CO2) Carbon Capture and Storage (CCS) technologieshave been developed. Chemical Looping Combustion (CLC) is a CO2 capture technologywith the CCS framework, and at Chalmers University of Technology in Gothenburg,Sweden, a 100 kW chemical looping combustor has been built.This project aimed to investigate to what degree air can replace helium as the uidizinggas for uid dynamical studies in a CLC cold ow model of the above mentioned 100 kWfacility. Experiments were performed using air and helium separately as uidizing gas andpressure data were obtained, which formed the basis for the comparison. The project alsoaimed to investigate uid dynamics in the uidized bed and study when the risk of sluggingoccuring was greatest. The results were presented in the form of figures and tables dividedinto pressure, concentration and standard deviation of the pressure.The results obtained showed that air as uidizing gas did not create the same uid dynamicsas helium over the entire fuel reactor.