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590 Uppsatser om Wear resistance - Sida 9 av 40
Analys och utveckling av boggi till ramstyrd dumper
Volvo Construction Equipment is one of the worlds largest manufacturer of heavymachinery. In Braås, Sweden, they develop and manufacture articulated haulers inseveral sizes. The biggest, the A40, is capable of loading almost 40 metric tonnes.These haulers have a bogie to distribute the forces of the load evenly onto the two axlesand there wheels. The bogie is constructed using a rigid balance beam on each side ofthe frame connecting the axles or an independent solution using hydropneumatics.An analysis has been made in order to establish the forces created during corneringand through the theory, an estimation of the extensive tyre wear and extra fuelconsumption has been made. All due to the effects of the tyres not being inline with thecornering radius.
Ett Imperium På Nedgång?: En studie av USA: s Imperium
This is a thesis about the American empire. I also focus my work to see if this American empire is declining. The two main questions I ask and want to answer in this thesis are: is America an empire and is it in decline?I first conclude that America has been an empire ever since the end of the Second World War. The sheer military and economic power of the American empire matches and exceeds the ones before them.
Rullarmering - Ett rationellt sätt att armera
This is a degree project performed at Halmstad University in Sweden on the subject carpet ofreinforcement. This project is developed in association with Celsa Steel Service in Halmstad.The purpose of this report is to investigate how much time that can be saved if carpet ofreinforcement is used instead of the traditional way to work with reinforcement and seewhat kind of parameters that is important between the choices. We are also going to seehow this product affects the situation for reinforcement workers from an ergonomic point ofview.Carpet of reinforcement is made by straight reinforcement?s bars that are welded togetherwith steel bands. These rolls are made at a factory with a machine that welds together thebars in determined centre distance, with desired dimensions after the constructionengineers? blueprints.
?Det här är inte hat ? det här är humor!" : En visuell textanalys av makt och performativitet i systrarna Kronlöfs video SÅ JÄVLA PK!
This essay examines how humor is used in the making of stereotypes in the Kronlöf sister?s video SÅ JÄVLA PK! In addition I give my analysis of how power and resistance is shown in the video. Through Michel Foucault?s conception power and resistance together with Judith Butler?s theories about performativity I?d like to show how the characters you can see in the video, in addition to the humor, also put themselves in a public context. I discuss my material in relation to a number of similar and current events that concern sexism and racism in Sweden.
Förekomst av kvalificerade samtal i en kommuns skolor : En enkätstudie kring det specialpedagogiska samtalsuppdraget
Violence is put in a specific context when the police are the perpetrator of violence rendering violence possibly legitimate through sovereignty. The possibility of legitimization of police violence raises important questions of how such violence is legitimized and how resistance is conceived of and defined. I have interviewed seven people in Sweden from different backgrounds, all of whom share the experience of having been subjugated to police violence, including threats, harassments and physical violence.This paper analyzes the performativity of police violence through the relations between police violence, power, sovereignty, subjectstatus and resistance, in order to understand how police violence is being legitimized and to understand its consequenses with respect to those subjugated to it. I?ve also analyzed if this violence is being politicized and, in that case, how politicization is made possible.
Flexible Snowboard System
The project, Flexible Snowboard System, has been carried out by the project group independently and is a module developed for snowboarders, ski rentals and ski schools. The problems of today?s solutions are that they cause the user an inconvenient standing position when riding the ski lift or skating the transportation slope, also mounting, adjustments and disassembling of the bindings are time consuming and brings undesired wear to the screws and screw holes. In addition any adjustments require that the user steps out of the bindings and have tools at hand. Flexible Snowboard System is a universal module which means that it can be assembled with all of today?s snowboards and bindings.
Med kroppen som vapen : en studie av aktivism, mobilisering och motstånd mot en gruva i Gállok
This study departs from Gállok, an area 40 kilometres northwest of the city Jokkmokk, in northern Sweden. This is a place to which local people and Saami reindeer herders have material interests and emotional bonds. The mining company JIMAB wants to prospect for extracting minerals from this area. In the summer of 2013 local people, Saamis and environmental activists gathered in Gállok in order to protest and make resistance against these plans. Activism was made, debate articles were written, demonstrations were organized and information about what was going on in Gállok was shared through social media.The aim of this study is to examine the cultural processes of the anti-mining movement, in particular the happenings in Gállok in summer 2013.
Vad är ?rätt? gjutkvalitet? Hur uppnås det?
Ever since ABB has begun diecasting their rotors instead of permanent mold casting it,variation in the quality of the cast has arisen. Diecasting is performed in three differentmachines, M1, M2, M3 with 400, 660 respectively 800 tons of die locking pressures.The aim of this thesis is to answer the following questions:What is the ?right? cast quality? How is the right quality achieved?For sizes 160-180 solutions will be proposed that consider eccentricity between thelaminate and the short circuit ring as well as elimination of the thin Al film that appearson the outer periphery of the rotors.Through considering the statistic material the most often diverging rotor type has beenidentified and one of the actual rotors has been sent to a laboratory to be analyzed inorder to establish the current defects. The result of the analysis shows that there areplenty of gas- and oxide-porosity.It has been proved that every time the dies temperature decreased below 120°C thecontent of gas porosity increased. It is due to rapid solidification of metal that flowsthrough the ?cold? laminate.It has confirmed that enhanced porosity in squirrel cage causes high impedance in therotors.
Akustisk mätning av U-värde
This pre-study investigates the possibility of U-value measurements through an acoustic method. A hypothesis about an acoustic model built on acoustic theories combined with U-value theories is presented to answer the questions:
? Can U-value theory be combined with acoustic theories?
? Can the coefficient of heat be affirmed trough an acoustic measurement?
The idea for this dissertation begun with a logical idea in mathematical similarity, between the coefficient of heat transmission units and sound intensity units.
The U-value theory is based on assumptions such as initial resistance for inner walls and initial resistance for outer walls. The resistance in the material is interpreted through sound intensity theory.
The argument is built upon mass law theory, which means if the frequency or thickness of the material layer doubles it implies an increase of sound reduction by 6 dB.
Papperslöst motstånd : Om strategier och praktiker i post-välfärdens marginaler
The post-modern western city is going through two central changes in the organization of paid labour. One is the switch from production of goods to production of services, and the other is the increasing rift between well-paid labour with permanent jobs, and temporarily employed workers with low wages. Both of these processes are rasified and gendered, and strike harder against women, young persons and people of emigrant background. The flexible capitalism creates an informalization of the economy, breaking with earlier regulations of the labour markets, in which workers also need to find informal strategies in their individual and collective struggles. In this paper, I search for these ?new? experiences of living and working in late capitalist society, by doing open interviews with three women of Latin-American origin, working without official permission (without documents) in the informal economy of Stockholm.
Hydrofob interaktion : en resurs för att reducera antibiotikaanvändningen
It is important to know what is normal in the wound healing process in order to determine what happens when a wound does not heal as expected. If the amount of bacteria in the wound gets too large the body will not be able to defend itself and it becomes an infection. Colonization and infection are common elements in wound management and it is often the veterinary nurse role to deal with wounds in a proper manner. Antibiotics are drugs that either kill or inhibit the multiplication of bacteria or fungi, and have been in veterinary medicine for approximately 60 years. Very few new antibiotics are introduced and increased resistance is a major problem that requires everyone to take responsibility to reduce the use of it.
Representativa geologiska prover
För att SSAB ska kunna rekommendera rätt slitplåt till rätt applikation utför företaget omfattande slitageanalyser som innebär provtagning och analys av bergmaterial. Den egenutvecklade programvaran ?Wear Calc? används för att beräkna relativt slitage och relativ livslängd för en viss plåt i en viss situation. Genom att jämföra olika plåtar fås skillnaden i livslängd mellan plåtarna. Examensarbetet utfördes på uppdrag av SSAB Oxelösund AB och syftar till att ytterligare stärka säkerheten och ge högre representativitet i slitageanalyserna.
Stålbalkars bärförmåga vid intryckning - orsakad av lokal momentbelastning
This master thesis deals with steel girders subjected to patch loading caused by concentrated moments. There exist no good methods to calculate by hand the ultimate resistance for this load case. In ?tunnplåtshandboken?, (Handbook for sheet metal, which is published by SSAB), one calculation method is presented. It?s however fairly difficult to use, because of many calculation steps and many graphs.
Leaf structure and localization of a transgene protein in barley
Barley is one of the most important cereals cultivated in the Nordic countries. Climate change brings warmer and moisture climate which favors fungal diseases. In the cropland barley can be seriously infested with hard fungus attack. Since it is important that the yield bears a high quality it is of great importance to find varieties more resistant to attacks.Pathogenesis-related (PR) proteins are stress proteins induced in the plant in response to infection and abiotic stress (van Loon, 1997). PRs are shown to have antimicrobial activity differing between bacteria, fungi and oomycetes (Tandrup Poulsen, 2001).
I mötet mellan två världar: En studie om förändrade chefsroller i sjukvården
Swedish healthcare has experienced increased economic pressure during the last decades and organizations have faced many changes. Managers and their roles in organizations have also been affected by the changes. Traditionally, managers in the healthcare sector are highly specialized doctors with a strong medical background. In the thesis, we study a big private healthcare company with an ambition to lead the development in the sector. In order to accomplish its goal, the company is trying to change the organization of managers.