To be allowed to sell Z-suspended vehicles with dipped beam Xenon or LED lighting, Scania have to develop automatic headlight level control. This master?s thesis aims to be the foundation to that development.The thesis consists of several parts; a market analysis of how competitors to Scania and the general vehicle industry solve this problem; several available principles for detecting the amount of control needed; the construction of a test station for sensors, a control unit and components connected controlled by the control unit; a further theoretical and practical development of one principle ? one rotational sensor connected between the chassis and the back drive axis; a state flow model programmed in Simulink that produces the control signal for the headlight leveling from the sensor input.Lastly the thesis gives some recommendations to the further development and implementation of automatic headlight level control on Scania vehicles..

AbstractThis report is about the creation of a test system for development of a control system for a off the shelf RC-helicopter, which can be bought for about two thousand SEK. The test system consists of both electronics for controlling the helicopter and mechanical constrainer. The constrainer is used for mounting the helicopter so that it won´t crash.A circuit board including processor and sensors was manufactured. This was used for doing test of the different control algorithms. In this way were we able to analyze the quality of the sensors chosen, and what other sensors that could contribute to the control of the system.Basic helicopter control have been studied and presented in the report.

Denna rapport behandlar ämnet magnetisk resonanstomografi (MR), och kan sägas vara en orientering i ämnet, då många av de inom MR förekommande begreppen behandlas och systemets grundfunktioner tas upp. Det finns mycket litteratur i ämnet och för den intresserade finns alla möjligheter att fördjupa sig, referenslistan längst bak i detta arbete kan tjäna som boktips och guide till att komma igång med vidare studier. Arbetet tar upp den fysik som ligger till grund för magnetisk resonanstomografi och begrepp som protonspinn, nettomagnetisering och relaxationstider gås igenom. Dessutom görs en genomgång av hårdvaran i MR systemet och de olika varianter av system som finns, det vill säga permanenta-, resistiva- och supraledande magneter. Detta arbete fäster störst vikt vid de supraledande magnetsystemen eftersom de är de klart dominerande kliniskt.

Syftet med denna studie var att studera möjligheten att bedöma korrekthet i vittnens utsagor beroende av deltagarnas grupptillhörighet. I studien ingick 120 deltagare som antingen fick se en film med vittnesmål från fyra vittnen med enstaka centrala meningar eller läsa en text med samma meningar. De viktigaste mätningarna i denna studie gjordes efter signal detection theory (SDT). Resultaten visade att deltagarna inte skattade mycket över slumpnivå och ofta till och med under slumpnivå i sina bedömningar. I en hopslagning av betingelserna (text/film) visade analyserna att män generellt var signifikant sämre än kvinnorna på att bedöma vittnesmål, men att kvinnorna gör fler falska alarm än männen i bedömningen av textversionen.  De funna könsskillnaderna i hur vittnesmål bedöms diskuterades..

Jämtkraft AB which is a power production company in Sweden has bought two newhydro power units to their station in Hissmofors. The two new generators are using aconcept with sliding stator feet to handle the thermal expansion.The concept with sliding stator feet on hydro electric generators has not beenworking satisfactory on many hydro power stations in Sweden and has caused a lot ofcosts due to long downtimes.The new station in Hissmofors is very important for Jämtkraft AB, and therefore theywant to know how to make sure that the sliding stator feet are working as theyshould. According to theories and a simplified model of the generator the stator feetdisplacement should be around 1 -1,6 mm.The generators are delivered with a surveillance system that will measure thedisplacement of the sliding stator feet. The signal from the system isn?t accessible forJämtkraft AB but it will alarm when the sliding stator feet are malfunctioning.To secure the function of the sliding feet a logger for the surveillance system or adifferent measurement system must be used; if both systems are used Jämtkraft cansecure the function of the surveillance system..

I denna uppsats undersöker jag om den procentuella löneutvecklingen för de män som fick barn precis efter det att den första pappamånaden infördes, januari 1995, var sämre än för de män som fick barn precis innan reformen genomfördes, december 1994. Med datamaterial från Statistiska centralbyrån, genomförs ett naturligt experiment. Den huvudsakliga slutsatsen då man jämför den procentuella löneutvecklingen av medellönerna är att även då de fäder som fick barn i januari 1995 tog ut mer föräldrapenning har inte deras löneutveckling påverkats. Löneutvecklingen för dessa fäder är densamma som för de fäder som fick barn i december 1994. Därmed finns det inget i denna uppsats som tyder på att om män tar ut en liten andel föräldraledighet sänder det en negativ signal till arbetsgivaren som justerar lönen nedåt för mannen i fråga..

Today?s cell phones include more and more functionality, it is no longer uncommon to be able to connect to the Internet or take photos with the cell phone. In this thesis the question is if the cell phone users are interested in this new functionality. Are there people who are interested in a cell phone that in this thesis is called ?Basmobilen? (the entry level phone), which include the following functions; phone call, SMS, phone book, calling lists, clock and the possibility to change the call signal.

This thesis in Art History and Visual Science is about values to graffiti and graffiti artist Banksy. I have studied values relating to Banksy´s graffiti images through which context they are placed in and where they are located. I have selected two different images of Banksy as an example on the basis of a transnational phenomenon, where the images that circulate in the public arena by street art and other images and imported into the galleries and consumption market. My conclusion is that the values of the images are based on the context in which each room have its surroundings and that therefore the impression will increase. The public space context, signal availability and the white cube context indicates art, and the commercial context signals goods and items that can be bought.

IIR-filter är överlägsna traditionellt skapade FIR-filter på många punkter. De klarar sig med en klart lägre ordning för att realisera ett filter med samma egenskaper. En nackdel är däremot att filtret är klart känsligare för koefficient kvantisering och förlorar sina egenskaper när koefficienterna ändras, detta inträffar även om förändringen är liten. Genom den speciella struktur som vågdigitala filter använder sig av kommer man runt detta problem. Det betyder bl.a.

This Masters thesis work describes a comparison between two different methods for estimation of the down channel (base station to mobile subscriber) in Wide-band Code Division Multiple Access (WCDMA). The first estimation method, Optimal Feed-forward Channel Estimation (OFCE), is a conventional method that bases the estimates on data that is known to both sender and receiver, so called pilots. The second method, Decision Directed Channel Estimation (DDCE), is an elaboration of OFCE. It also uses user data for estimation. Simulations show that DDCE, in comparison to OFCE, does not attain an improvement in signal-to-noise-ratio (SNR) for high bit error rates (BER).

Detta examensarbete har utförts på Örebro universitet och Västerdalarnas Mekaniska Industri AB (VMI) i Malung för Ehrlund Microphones.Ehrlund Microphones tillverkar mikrofoner med sin patenterade kapsel, som bland annat består utav ett triangulärt membran.Under examensarbetets tid var en ny mikrofonmodell under utveckling. Målet med examensarbetet var att bistå Ehrlund Microphones med utförandet av tester och mätningar, samt att komma med förslag till förbättringar på den nya konstruktionen.På VMI i Malung, där kapslarna tillverkas, finns ett mätlabb som är till för att mäta kapslarnas frekvenssvar. Mätutrustningen i detta labb har installerats och konfigurerats för den mätmetod som har tagits fram för att verifiera kapslarnas frekvensgång.Slutsatsen av undersökningen huruvida skyddsgallret påverkar mikrofonens frekvensgång, är att den volym luft som ryms innanför skyddsgallret har större betydelse för frekvensgången än vad den geometriska utformningen av gallret har.Med stor sannolikhet kommer den nya transistorbaserade mikrofonmodellen att ha ett bättre signal/brus-förhållande än vad som visas i detta arbete, eftersom testerna har utförts på en prototyp i utvecklingsskedet..

The pig is unique in the way that it gives birth to a large number of newborns in each litter. Because of this the sow has developed a special behaviour during suckling to ensure that not only a part of the litter gets all the milk. Milk is only available during milk letdown. The piglets have to massage the udder for a long time before letdown and the more piglets at the udder the sooner the milk comes. The sow has developed a special grunting pattern to let the piglets know when she is ready for suckling and to signal milk letdown. Our aim with this study was to investigate if sows have individual grunting patterns repeated over time. We also wanted to know if sows with a more distinct grunting pattern have better growth in their litters.

The project Design analysis and proposals of plastic screw caps in Australia was performed at Högskolan Dalarna incooperation with University of Western Sydney, Australia. The Swedish company Tetra Pak, in Lund, were assigner forthe project that was performed 2006-2007. The commission was to do a survey about the packages for non-carbonateddrinks in Australia. The bottles had to be plastic, able to open in one step and with focus on the caps.The project has result in design analysis and a new proposal of a plastic screw cap for the Australian market. Sixbottles were choosen and they were all testet on 20 consumers each with a Likert-scale test.

During the work at Gateway Security AB in Motala I began examining available antenna models to get a wider perspective, this have given knowledge of their structure, and an understanding of their function. All my necessary fact is based on my observations and notes of these measurings. New antenna models, and available models were examined where measurements at different heights and different distances on the antenna were performed with the help of an oscilloscope and a measure probe, peak ? to - peak was brought on the signal. The measurements are presented in a line diagram.

This thesis in Art History and Visual Science is about values to graffiti and graffiti artist Banksy. I have studied values relating to Banksy´s graffiti images through which context they are placed in and where they are located. I have selected two different images of Banksy as an example on the basis of a transnational phenomenon, where the images that circulate in the public arena by street art and other images and imported into the galleries and consumption market. My conclusion is that the values of the images are based on the context in which each room have its surroundings and that therefore the impression will increase. The public space context, signal availability and the white cube context indicates art, and the commercial context signals goods and items that can be bought.