The aim of this thesis was to investigate if the robotized welding method FSW (Friction Stir Welding) could be applied for joining a rotating structure in an aero engine at Volvo Aero Corporation. FSW is expected to introduce less defects than today?s welding methods and could therefore be suitable for critical aero components. The material is the nickel based alloy Inconel 718, however a material experimentation is outside the scope of this report.The main goal of this study is to verify if the ESAB ROSIO robot based FSW-system has a suitable work space to be able to weld the rotating structure, and if the welding tool has accessibility to the joints. The FSW-process needs a rigid fixture, and a number of fix-ture concepts are presented based on a proposed weld sequence.

During the nineties, ecological handling of urban storm water became very popular in Sweden. Together with Chalmers University of Technology and two Swedish communities, DHI Water and Environment has been doing research of storm water ponds and constructed wetlands. This thesis work is a part of that research project. The work has been applied at the Bäckaslöv storm water treatment plant in Växjö, Sweden. The plant consists of one storm water pond and a downstream constructed wetland.

Syfte Syftet med arbetet a?r att so?ka fo?rsta?else fo?r utvecklingen fra?n traditionell till digitalmarknadsfo?ring samt att analysera hur fo?retag praktiskt arbetar med detta.Studien anva?nder en kvalitativ metod och data har inha?mtats fra?n ba?de prima?ra och sekunda?ra ka?llor. Empirin har samlats in genom 10 intervjuer, vilket har analyserats med hja?lp av teori och det har sedan lett till studiens slutsatser.Studien visar varfo?r det finns en o?verga?ng fra?n traditionella marknadsfo?ringsmetoder till digitala marknadsfo?ringsmetoder, hur de kompletterar varandra och vilka verktyg som fra?mst anva?nds av fo?retagen i studien.Fo?rslag till fortsattforskning är Facebook-annonsering, ma?tinstrument, SEO och Web 3.0. Dessa termer ga?r att arbeta vidare med och det a?r na?got som va?r studie har pa?visat vara viktigt.I va?r studie bidrar vi till en fo?rsta?else av va?gen fra?n de traditionella marknadsfo?ringsmetoderna till de digitala marknadsfo?ringsmetoderna.

Inom Radiostyrd Bilsport tävlas det med ett antal olika klasser som drivs av 2-taktsförbränningsmotorer. Dessa blir mycket varma och måste kylas av. Det sker med hjälp av enkylfläns som är monterad ovanpå förbränningsrummet, och som kyls av fartvinden.HP Hobbyprodukter har frågat oss om vi kan hjälpa dem att ta fram en egen kylfläns åt dem.Eftersom det ofta förekommer ovarsam behandling i tävlingssammanhang, är det ett krav attkylflänsens ska tåla detta. Den måste även avleda värme från förbränningsrummet, motorblocketoch övriga motorkomponenter effektivt. Ett önskemål är att kylflänsen ska ha ett unikt utseende,så att den är lätt att känna igen ute på banan.Arbetet har inriktat sig på prototypnivå.

When drivers overnight in the truck lots of electric energy is consumed by heaters, fans, lights and other extra equipment. If the engine is not running, this energy is taken from the lead/acid batteries of the truck which then needs to be recharged during operating hours. The fact that the charge acceptance of the lead/acid batteries is dependent on the temperature makes it hard to fully recharge the batteries at lower temperatures. A negative charge balance can lead to starting problems within a few days use in cold climate.In this thesis work, the effects of different battery charging concept are evaluated on the most common Scania battery (175Ah). A battery model is implemented in Matlab and some simulations of charging are made.

The purpose of this thesis is to examine the performance of different types of queries in the AltaVista query-based search engine. Thirty information needs have been collected from an ask-a-question service on the World Wide Web, which means that they are based on real users information needs. This is done to avoid partiality in the study. The author has invented different types of queries for each and every one of the information needs in accordance with the search syntax available for AltaVista. The types used are Boolean expressions, queries including proximity operators, phrases and queries directed towards a specific field.

The objectives of this research were to determine whether the natural rattan resources in Sulawesi, Indonesia can cope with the strongly increased harvesting pressure that has occurred over the last centuries. I was furthermore looking for patterns in the rattan population dynamics that might give a hint on how the harvesting system could be improved to ensure a maximum sustainable yield. To answer these questions, I developed an individual-based model to analyse the dynamics of rattan growth in connection with rattan harvests by locals to identify sustainable levels of rattan harvests around villages in Sulawesi, Indonesia. Scenarios with different harvesting intensities were run to compare the change in harvest amount. For a given harvesting pressure, scenarios with a high number of harvesters and a low harvesting frequency had the same effect as scenarios with high harvesting frequencies and a low number of harvesters.

Syftet med detta examensarbete var att skapa ett serverprogram i en enkortsdator som arbetar i realtid för att kunna hjälpa människor att köra mer ekonomiskt och miljövänligt i deras vardag.Detta var ett av målen ställda av produktbeställaren Ziggy Creative Colony. Ett mer långsiktigt mål från beställaren är att datorn skall installeras i en bil och kopplas till bilens on-board diagnostic-II (OBD-II)-uttag. Datorn ska sedan, via OBD-II, kunna samla information som till exempel hastighet, acceleration och bränsleflöde från bilens engine control unit (ECU). Serverprogrammet ska bearbeta denna information som sedan kommuniceras och visualiseras till bilföraren via en native mobilapplikation.Serverprogrammet byggdes i en linuxbaserad dator: Raspberry Pi och döptes av oss till Car-Pi. Car-Pi designades enligt arkitekturmönstret Model-View-Controller (MVC) som gör det lätt att underhålla, vidare-utveckla och implementera programmet av produktägaren, Ziggy Creative Colony, i framtiden.

This master?s thesis seeks to examine how a public library use the intranet with regards to the possibilities that today?s intranet technology offer ? especially concerning functionalities that support information, communication and knowledge exchange in the organization. The purpose of the study is to investigate how employees in one specific public library perceive and use the intranet in their daily work. The theoretical framework takes its point of departure in two complementing models regarding the implementation, development and management of intranets and a model of a multi perspective view of the intranet as a shared information space for content, communication and collaboration. The study is based on interviews with eleven of the intranet users, whom with the aid of an interview guide have been asked questions regarding goals, implementation, content, design, applications and advantages/disadvantages with the intranet.

The Multispectral Canopy Reflectance Model (MCRM) by Kuusk (1995) has beenused to simulate the reflectance of a sugarbeet canopy. The simulated reflectancevalues show high absorptance in the VIS area, compared to field measurements, andhigh reflectance values in the NIR area. The errors may be due to overestimation ofclorophyll content in the sugarbeet leaves and scattered light during fieldmeasurements. The estimation of the clorophyll content where carried out using thePROSPECT-model by Jacquemoud & Baret (1990).During the vegetation period, the state of the canopy moves towards a closed canopy,with sparse vegetation in spring. The MCRM-model was used to perform a ?spring?simulation, which was compared to the original simulation.

Stadsmodeller i 3D är en allt mer bidragande faktor inom GIS och vinster i tid för räddningstjänst vid användandet av 3D-GIS har påvisats. Arbetet presenterat i rapporten behandlar nätverksanalyser i 2D och 3D och har utförts på uppdrag av Gävle kommun.  Uppgiften har utförts med två huvudsakliga mål. Det första målet var att jämföra processtiderna för Dijkstras sökalgoritm mellan nätverk (ett mindre baserat på förvaltningshuset i Gävle och ett överdimensionerat nätverk) i 3D och motsvarande nätverk i 2D, för att sedan avgöra skillnaden. Det andra målet var att utveckla en applikation som tillåter vägledning i 3D för besökare från reception till önskad anställd och få rutten visualiserad i en 3D-modell. Arbetet har i huvudsak genomförts med ESRI ArcGIS Desktop 10 och ArcGIS Engine 10 Developer Kit.

The tourism industry is a young industry in Sweden but important for the economy and a large part of the field is mountain tourism. Marketing a place is called destination marketing, which has become a huge phenomenon and an important part of efforts for promotion in the tourism industry. The entrepreneurs in the tourism industry are an important part, as these are a big part of the destination. Their marketing and communication becomes a force to reckon with in order to attract tourists to the area. The purpose of this study is to examine how entrepreneurs through destination marketing reach their target market and with the intention to identify marketing channels that the entrepreneur uses.

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.