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573 Uppsatser om Flat surface - Sida 13 av 39

Säkring av samtliga kritiska skruvförband i mellanstora asynkronmotorer

The purpose with this thesis is to get a compilation of all the critical bolted joints of all enginesproduced at LV Motors. ABB LV Motors produces induction engines with seven shaft heights. Eachengine size exists several variants of components ex. standard shield and flange shield. Depending onwhich components the engine is equipped with arises various types of strains in the engine's parts,certain assembly ways are more favourable than other.The most critical parts in the engine from a mechanical point of view are the screw units betweenshield/stator, feet/stator and bearing cover/shield.

Simulering av översvämningar i Nedre Dalälven

Mosquitoes are found in extremely large numbers in the lower parts of the River Dalälven. In the year 2000 the mosquito nuisance was especially high, resulting in foundation of the Biological mosquito control project. Since 2001 mosquito larvae are controlled by using a biological pesticide BTI (Bacillus thuringiensis ssp israelensis). The mosquito fauna in the area is dominated by flood water mosquitoes, a group of mosquitoes that are very aggressive and form new generations of mosquitoes during every single flooding event during the summer. To be able to efficiently control the mosquitoes it is essential to know the extension and locality of the flooding.

Optimering av glödgningsparametrar för kromstål

At Sandvik Materials Technology, Argon gas is used as furnace atmosphere when heattreating hot rolled wire. Upon heating chromium steel wire, a rich oxidelayer forms on the wire surface. The abstract of this masters thesis is to enhance the understanding of the constitution of the oxidelayers and the influence of the furnace atmosphere. This will be achieved by performing a number of annealing experiments on laboratory level. Also, the aim is to understand the chemical reactions and physical mecanisms controlling the pickling process.

GRÖNYTEFAKTOR I ETT NYTT PERSPEKTIV - Går ekosystemtjänster att mäta med fjärranalys?

Due to an increased population in cities the need of densification of cities increases. This means that the amount of ecological elements in the city is at risk of decreasing. Ecological services contribute to the city?s climate by softening the negative impacts that densification of cities means. Thus increases the will and ambition in city planning in to preserve greenery.This is an interdisciplinary thesis within the subject of geography that studies Biotope Area Factor (BAF), a planning tool that is used in city planning with the purpose of compensating for lost ecological services associated with new housing estate.

Samarbete, autonomi och stora personalgrupper : En personalvetenskaplig fallstudie om förutsättningar för medarbetare i en grundskola

The study is based on a human science perspective in which we are interested in the school as a workplace for adults and work with personnel issues. The aim is to contribute with new knowledge about what conditions an employee considers important to carry out their work, and employees' experiences of working in large personnel groups.We have made a case study in a Swedish local primary school for students in lower ages, with between 60-70 employees. We conducted nine semi- structured interviews with a hand-picked selection of employees from different occupational groups in the school. The study is empirical data -driven qualitative with abductive approach. To analyze the collected datamaterial, we have used the empirical data -driven thematic analysis.From the results of the study some aspects appear clearly; employees need to be seen by his/her boss, importance of employee autonomy and employee experience of stress.

PERSONLIGHET OCH FÖRMÅGOR I KARAKTÄRSDESIGN : Vikten av personlighetsdrag för förståelsen av fysiska förmågor

Det här arbetet fokuserar på vikten av spelkaraktärers personlighet för förmedlingen av deras fysiska förmågor. Den teoretiska grunden till arbetet ligger i kognitiva och fysionomiska teorier om stereotyper. Det görs skillnad på mjuka och hårda karaktärsdrag, där mjuka karaktärsdrag avser personlighetsdrag och hårda karaktärsdrag avser fysiska egenskaper och förmågor. Arbetet undersöker om karaktärer som formges utan mjuka karaktärsdrag är fria från subjektiva värderingar utan att det förhindrar en korrekt uppfattning av karaktärens syfte.För att undersöka detta skapades åtta karaktärer som delades upp i två karaktärsgrupper. Den första gruppen innehöll både mjuka och hårda karaktärsdrag och den andra gruppen innehöll endast hårda karaktärsdrag.

Trafikklasser för markplattor av natursten : förslag till klassificeringstabell

This report deals with hard surfaces and the factors which are behind the criteria for dimensioning, also dependent on the level, or volume, of traffic. A test was made on slabs of two kinds of natural stone. This was made to see if the values that were reached for breakload was transferable to the same tables that the concrete industry is using for surface dimensions of slabs and paving stones. The test showed very high values and the result, together with the written study, led to the author?s suggestion for a classification table where slabs of natural stone were divided in to different classes depending on traffic, thickness and durability..

Snabbare, högre ...och det Tredje Könet : Om könsgränserna inom idrotten och överträdandet av dessa

This thesis examines the gender boundaries in sports. I do this by exploring three cases in which these boundaries, at least on the surface, have been questioned: the transsexual tennis player Renée Richards, the east European runners Marita Koch and Jarmila Kratochvilova and the Swedish golf player Annika Sörenstam. The results point out different mechanisms that contain the"danger"and restore"security". But they also point out a criticism against the struggle for equality in sports, which is based on the preserving of differences and therefore cannot challenge the ideological assumptions about gender in sports..

Dynamisk massbalansmodellering av fosfor i Östersjön

During the past few years a vast amount of research has been done to increase the understanding of the complex ecosystem of the Baltic Sea. Modelling and simulations are important tools to increase knowledge of the system. A suitable model must be simple to use and the parameters and variables needed in the model must be easy to access.In this paper a dynamical mass-balance model, CoastMab, which is validated for smaller coastal areas, has been used to predict concentrations and transports of phosphorus in three large coastal areas - the Gulf of Finland, the Gulf of Gdansk and the Gulf of Riga. CoastMab uses ordinary differential equations to regulate inflow, outflow and internal flows. To reflect seasonal variations in temperature and different types of flows the model has a temporal resolution of a month.

Verktyg för utveckling av terrängparker inom skidanläggningar. : Shaper

Today we can create digital 3D models which can be realised almost instantly through production methods such as 3D printing and computer controlled milling.What if this same technology could be applied to the development and construction of terrain parks?With snow as the material tools could be developed using similar principles to design and sculpt the surface, only on a larger scale.How would terrain park designers adapt their process to use this new technology? In this Industrial design thesis I explore how the ideas of the terrain park designer can be expressed through such a system with focus on the designers knowledge and skill without the need to learn complicated 3D programs.Sketch, create, ride. .

Vetorätt i FN:s säkerhetsråd : Dess inverkan på humanitär intervention

The purpose of this degree project was to examine which remedies are available to individuals when the State has violated their right to a fair trial as stated in article 6 in the European Convention on Human Rights. Furthermore, the aim was to, in cases where the remedy is determined to money, to clarify the indemnity rates that apply in determining the non-pecuniary damages. The starting point was a review of the European Court practice, domestic Swedish practice and relevant literature.The outcome of the review is that the remedies available to the individual?s disposal can be divided into two categories: primary and secondary remedies. Primary remedies mean compensation not consisting of money, and must be exhausted first.

Kemin bakom framtidens avgasrening : En studie av ureasönderfall under kvävgasatmosfär

The purpose of this work was to provide a better understanding of urea?s decomposition and byproduct formation in an SCR system on heavy trucks. In my experimental setup with TGA-DSC-FTIR (a combination of two thermal analysis methods and a method for gas phase detection), an FTIR method for urea in the gas phase was developed for the qualitative and quantitative determination of urea and its decomposition products. Chemicals such as urea, biuret, cyanuric acid and melamine of p.a. quality were used in this method development. Beforehand, there was no FTIR method available to detect these substances; hence, the aim of this work was to develop an FTIR method to understand the degradation chain of urea. The combination of TGA and DSC was used for analysis of different samples, where urea, biuret, cyanuric acid and melamine in varying amounts have been weighted in for various experiments in order to study the temperature at which a phase transition or reaction occurs, i.e.

Recipientundersökning av Ensjön : Bedömning av sulfidmalmgruvan Enåsens eventuella påverkan på sjöns vattenkvalitet

Ensåsengruvan is a mine situated within Ljusdals municipality in central Sweden. Themine was in use from 1984 to 1991 and has since been undergoing a remediation program. Mine tailings from sulfide rich ore is a potential environmental hazard due to its tendency to cause acid waters and heavy metal leakage. Lake Ensjön is situated one kilometer from the mine area. Due to the hydrological conditions it was not expected to receive inflowing water from the mining area.

Studie av nötnings- och friktionsegenskaper vid höga temperaturer i Kanthal APMT

During this master thesis, wear and friction properties for the high-temperature alloy Kanthal APMT were studied. The results were also compared to 253MA. The initial tests showed, among other things, that the surface fineness of the muffle tubes matters in real applications like conveyor belts. A 253MA-sample wear-tested against a 253MA-tube showed lowest wear at 900°C while a pre-oxidized APMT-sample wear-tested against a APMT-tube had the lowest mean value of the friction force at 1100°C, compared to all other tests..

Avsättningsmöjligheter för slaggrus från avfallsförbränning vid Åmotfors Energi

The incineration of waste is steadily increasing in Sweden and so is the production ofashes. The bottom ash has for many years been used as construction material inlandfills. Now many of the nation's landfills are closed and there is a great need to findanother beneficial use for the ash. Bottom ash is a gravel-like material and with itsmaterial properties it can replace natural gravel in parts of roads and surfaceconstructions. Today this use is only approved within landfill areas where leachate iscollected and checked.

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