En gruva kan orsaka stor påverkan på den omgivande miljön, bland annat påverkas grundvattennivåerna kring gruvan eftersom den länspumpas. För att få starta en gruva i Sverige måste tillstånd erhållas och då krävs en miljökonsekvensbeskrivning med bland annat en utredning om hur gruvan kommer att påverka omgivande grundvatten. Syftet med det här arbetet var att undersöka hur ett teoretiskt djupt vertikalt gruvschakt påverkade grundvattnet i det omgivande berget. Gruvan i den här studien antogs vara omgiven av sprickigt berg. Sprickigt berg har mycket heterogena hydrauliska egenskaper vilket gör beräkningarna av grundvattnets strömning komplicerade.Grundvattenavsänkningen beräknades dels med analytiska metoder, dels med numeriska metoder.

Examensarbetet är ett planeringsprojekt i direkt anslutning till Stockholms innerstad. Planområdet är ett avvecklat stations och spårområde, där framför allt gods har hanterats under det senaste seklet. Den ursprungliga användningen av området har successivt avvecklats, och ersatts av andra verksamheter i de gamla magasinsbyggnaderna i området. Spårområdena har omvandlats till parkerings- och uppställningsplatser. Sedan SJ lämnade området har planer tagits fram för en förnyelse av området.

Att kombinera flera olika undersökningsmetoder i ett projekt är något som sker dagligen. Detta examensarbete har utförts i ett projekt som inom geotekniken kombinerar relativt sällan använda metoder. Samtidigt som i stort sätt hela undersökningsprogrammet är utfört på vatten.I examensarbetet utvärderas de geotekniska undersökningarna som Vectura Consulting genomförde för projektet City Link i Stockholm under tiden hösten 2011 till våren 2012. Undersökningarna utfördes på uppdrag av Svenska kraftnät för konstruktionen av City Link vilken är en TBM driven tunnel som skall gå under Centrala delarna av Stockholm. Examensarbetet är utfört på uppdrag av Vectura i Sundsvall där Per Nilsson har varit drivande i de frågeställningar som examensarbetet tar upp.De använda undersökningsmetoderna i projektet har varit Jb-sondering, reflektion- och refraktionseismik, MWD-styrd sänkhammarborrning och kärnprovtagning.

The low bearing capacity of roads during the spring thaw and periods in the autumn leads every year to increases costs for Holmen Skog. To reduce costs and increase accessibility Holmen Skog decided to install and test a CTI-system. Central tire inflation (CTI) is a system that makes it possible to monitor and vary a vehicle?s tire inflation pressures from the cabin, while the vehicle is in motion. When tire pressures are reduced, the area of the contact surface between the tire and the road increases, thus reducing the ground pressure. The purpose of this study was to evaluate the CTI-equipped vehicle and analyze if the CTI technology is economical defensible during the thaw 2005.

Volvo Construction Equipment is a world leading company in construction machinery. Tomaintain the best products, development is prioritized. The master thesis regards sound reductionof the hydraulic system on a wheel loader. The background to the master thesis is asimulation made on the hydraulic system, performed autumn 2005. The result of the simulationshows that the energy of the pressure ripple is reduced when the paralleled hydraulicpumps are phase shifted and reduces each others pump pulsations.

Drömmen om en tunnel genom Hallandsåsen har funnits sedan tidigt 1900-tal. Syftet med denna järnvägstunnel är att göra västkustbanan mer effektiv och konkurrenskraftigare än vägen. Genom att ta bort flaskhalsen som den nuvarande järnvägen utgör kan tågkapaciteten samt tåghastigheten öka förbi Hallandsåsen. Detta är en riktning med miljön då tågen rullar med 100 % förnyelsebar energi vilket medför att miljöbelastningen kan minska. I projekt Hallandsås används en tunnelborrmaskin (TBM) som är gjord för att både kunna borr i hårt och mjukt bergmaterial.

This thesis has treated a three-axis robot which task is to serve a larger test machine tomove the modules to be tested, from the storage to the test site. The robot is composed ofthree linear actuators; two standard components of ball screw type and a custom-builtactuator of trapezoidal type. The work has mainly focused on the custom-built device to seeif it could be replaced with a standard component. Part of the work has been to look into thepicking tool and to see if there are any possibilities to improve its function.The report presents two different proposals which I decided to call Robot 1 and Robot 2 andthey aim to address the problems arising in the purpose-built linear unit and the X-axislinearity problems. Robot 1 focuses on eliminating the problems that arise around therobot's X-axis, with such simple means as possible and without making excessive materialchanges.

Pekska?rmar anva?nds i allt sto?rre utstra?ckning som interaktionsteknik fo?r hemelektronik. Tekniken har traditionellt sett inte anva?nts i kra?vande miljo?er, exempelvis i miljo?er da?r skakningar och g-laster fo?rekommer. Introduktionen av pekska?rmsteknologi i cockpitmiljo? fa?r konsekvenser fo?r utformningen av fo?rarmiljo?n vilka bo?r utredas.Denna studie syftade till att empiriskt utva?rdera anva?ndarnas prestation med avseende pa? precision vid olika interaktionsmano?vrar pa? en pekska?rm.

The agriculture is today in a development that leads to bigger and bigger units in the primary production. To be able to follow this development many companies chooses to cooperate in different ways. The most radical change is when farmers fuses with other farmers and merge into to a big collectively owned operation firm. The reason behind this idea is that the firms achieve the big companies advantages by being complement to each other. The purpose of this essay is to make an economic analysis of two crop production companies who works together in an operation firm.

The main objective of this thesis was to develop appropriate strategies and find factors that affect the usability of parameterized designs. This was accomplished by investigate the user-interface and how it is designed to meet the user's information needs. The thesis also embraces the basic theories in terms of investigation, cognitive design principles and human behavior patterns in the interaction with the machine. The approach has led to an explorative investigation in this subject area.The thesis also had the purpose to achieve more efficient ways for development of motor chainsaws at Husqvarna AB's department Global Cutting Equipment. That can be achieved through reduce costs of development per sold unit.

Powder Metal (PM) gears are machine element components which operate under the same principle as conventional gears, but, due to their intrinsic material characteristic need to be designed slightly different, and its manufacturing process offers advantages previously unobtainable by conventional steel gear manufacturing methods. The use of PM in similar applications, such as synchronous hubs, makes them a suitable candidate for production in such material. The current master thesis work focuses on gear design using PM by utilizing finite element method (FEM) to reduce weight and inertia taking into account root bending strength and tooth deflection.First a topological optimization is used to determine feasible candidates for different web designs which have as objective to reduce volume, similar topologies were shown during different loading conditions; and hence, this topology was chosen as a suitable candidate. A shape optimization of the topological candidate was performed having as state variables root bending strength, independent for compressive and tensile side of the tooth loading; and tooth deflection, which in concept can be correlated to static transmission error (TE).Another aspect in this thesis analysed is the possibility to incorporate non-trochoid root geometry, a trochoid root is always present when machining with a hob, into the gear root and hence reduce the stress concentration here. Due to the use of PM, a non-symmetric optimized root can be achieved and hence be optimizing compression and tension.Results showed significantly lower inertia, for example certain results showed 40% reduced when compared to solid gear, with adverse effects as increase in tooth deformation and increase in maximum principal stress.

This thesis has been performed at International Aluminum Casting AB in Eskilstuna,Sweden.International Aluminum Casting is currently working with a number of improvementsin their production in order to achieve their vision of being the leading aluminum foundry in Sweden. As a step in their improvement efforts, focus was directed ondeveloping the company's fixtures for machining.Efforts were focused on two main objectives: to develop a complete proposal on afixture which leads to a more rational use of an assigned part and also form general design advice for development of fixtures in the future.During the work progress, discussions have been made with experts at International Aluminum Casting within the field of fixture design. The objective was to obtain sufficient knowledge about the underlying problems with the current fixture for the part. At this stage of the thesis, a number of essential criteria for fixture design were produced. Information and inspiration were obtained by examining the company?s currently developed fixtures.After gathering the necessary information the process of developing three different fixture concepts started.

In Peter Weiss debut Fra?n o? till o? (1947) the ?I? travels from island to island as a castaway. The island here can signify, or work as a synecdoche for exile and the feeling of isolation that exile often induces. But the movement from island to island also implies a restless state: Peter Weiss shifting from painting to writing to filmmaking and theatre, from German to Swedish and then back to German. The years during exile and the years that followed the exile until his breakthrough in Germany with Schatten des ko?rpers des Ku?tchens (1960), Abschied von den Eltern (1961) and Fluchtpunkt (1962), were the formative years of Peter Weiss authorship.

The study investigates questions and considerations emerging when stone in historic buildings needs to be replaced. The focus is on the surface treatment of stone in sandstone façades in pre-industrial buildings. That means buildings constructed by traditional methods and craftsmanship without the use of modern technology.The research issue originates from the extensive stonework that is planned for the façades of the Stockholm Palace. The project includes the replacement of large quantities of damaged stone to newly cut stone. This raises the questions about the use of modern and rational methods for surface treatment on the replacement stone.

Grubbe Ventilation AB is a sheet metal and ventilation company who provides design, installation, service, and repair of ventilation. The company is expanding their business by building a new facility in Umeå, Västerbotten. The property is designed to be used for both office and industrial work.Grubbe Ventelation AB has not yet decided upon wish system which is to be established to provide the building with heating and cooling. The consulting firm Umeå Projekt Team has therefore been asked to investigate the possibilities to invest in geothermal- heating and cooling.If the investigation of a geothermal heating- and cooling system would provide favorable results it would be a very appropriate alternative that provides energy at low costs and are an environmentally friendly option as the energy comes from stored solar energy in the ground is provided by stored solar energy in the ground.The facility ´s heating and cooling consumptions are calculated in the program BV2 and the result indicate a heating demand of 185 000 kWh per year due to thermal transmittance, transmission losses, heating of warm water and a cooling requirement of 5500 kWh.Three different systems of geothermal heating and cooling were tested in the computer program Energy Earth Design. The results show no difference in the dimensioning of the drill hole if merely heating were to be used or both heating and cooling were to be established.