Sedan radar började användas under första hälften av 1900-talet har duellen mellan radar och signalspaning pågått. Genom att utnyttja radar har alltid en medveten risk tagits, risken att bli upptäckt av motståndarens signalspaning. Duellen gavs möjlighet att ta en paus då radarsystem med låg uteffekt introducerades på marknaden under slutet av 1980-talet, nu fanns plötsligt en möjlighet att använda radar samtidigt som de samtida signalspaningssystemen inte kunde upptäcka dessa radarsystem. I föreliggande magisteruppsats i krigsvetenskap med militärteknisk inriktning undersöks räckviddsförhållanden mellan dessa radarsystem och signalspaningssystem. Genom scenarier i den marina arenan försöker jag värdera de taktiska vinster en användare av radar med låg uteffekt kan göra.

Det är väl belagt att patienter postoperativt och inom intensivvården drabbas av en funktionell sömnbrist i form av störd dygnsrytm, stort antal uppvaknanden och rubbad sömncykel med underskott av djupsömn och REM-sömn. En delförklaring till sömnbristen är de generellt höga ljudnivåerna på intensivvårdsavdelningar. Syftet med föreliggande pilotstudie var att undersöka huruvida öronproppar kunde förbättra den upplevda sömnkvalitén för patienter inom intensivvård och postoperativt. Tjugotvå patienter från två intensivvårdsavdelningar, en hjärtintensivvårdsavdelning och en postoperativ avdelning deltog i studien. I interventions-gruppen sov elva patienter en natt med öronproppar och elva patienter som sov utan öronproppar utgjorde kontrollgrupp.

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).

My interest in examining what happens when you as a teenager are exposed to five or six times the amount of time as ordinary classes to music education derrives from my own experience as a music teacher at a school which has those kind of special music classes. During my career as a music teacher in grades 4 ? 9 in Swedish compulsory school I have taught music classes as well as ordinary classes for 18 years. During this time I have often wondered what this exposure means in retrospect. Is it the conquering and mastering of music skills that students remember when they?ve grown up to young adults, or is it something else?The aim of this study is to find out what it means for teenagers to have music as a school subject every day of their years in Swedish high school.

Ett vanligt förfarande i parapsykologiska s.k. ganzfeldexperiment är attmed hjälp av vitt brus, som spelas upp i hörlurar, försöka omslutaförsökspersoner i ett slags totalt och oföränderligt perceptuellttillstånd. I föreliggande studie undersöks konsekvenserna av attanvända vitt brus som bakgrundsljud. 30 försökspersoner har lyssnattill åtta ljudslingor innehållandes fyra typer av brus vid två olikaljudnivåer, för att sedan i ett enkätformulär uppskatta hur dessa ljudpåverkat dem. Resultatet visar på signifikanta effekter av så välbrustyp som amplitud, och dessutom en signifikant interaktionseffektdem emellan.

KKS includes difficulties hearing speech in background noise although results from pure toneaudiometry are normal. The condition is also called ?Obscure Audiotory Dysfunction? and?Auditory disability with normal hearing?. KKS affects a heterogeneous group. We believethere is a need for synthesis of existing studies to acknowledge the condition in Sweden toimprove rehabilitation for the affected individuals.

Mussel meal is a potential source of protein, with a good composition of amino acids, for laying hens and broiler chickens, and may replace the use of fish meal in organic poultry production. Lead and cadmium are heavy metals which occur in the environment and can be accumulated in mussels. When poultry are exposed to heavy metals, the metals are absorbed in the small intestine and distributed in the body in the form of ions, complexes or bound to proteins. In poultry, lead accumulates in bone tissue, liver and kidneys, while cadmium accumulates in liver and kidneys. Generally very low concentrations of these heavy metals occur in muscles of broilers which have been exposed to feed contaminated with cadmium or lead.

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). An improvement is only seen when the BER becomes much lower than what is common in real situations. In conclusion DDCE is complicated, involves many mathematical operations and gives insignificant improvement of SNR when BER takes common values. It is legitimate to question if it is possible to use the method in a real mobile phone system..

I did my degree project together with Universeum AB. The project had the work title: children?s world and the aim were to give children between 3-8 years old a place that was especially made for them. With their interests and needs in mind the area should trigger play but also learning through a well planned pedagogical environment.I did this project because I thought this was an excellent opportunity to really practise my new gained skills I had learned during my two years in CCD (Child Culture Design). It also gave me the opportunity to actually see how well my knowledge was working when it was put to the test, and I did learn a lot from this.Together with a crew of 6 people I developed and designed the area.

The effects from a planned wind farm on the grid utility Gävle Energis electrical grid have been studied. The wind farm is planned to be built in the forest 15 km north of Gävle and will have 23 turbines with rated power from 2 to 2.5 MW, resulting in a total installed power between 46 MW and 57.5 MW. The grid connection will be made at 70 kV. The aim of the analysis was to determine what effects the wind farm would have on the power grid in the form of electrical disturbances (flicker etc.), need for new investment and raised operational cost. To allow the connection of the wind farm technical solutions (new lines, power stations and grid reinforcements) have been constructed.

The purpose of the following thesis has been to study librarians' attitudes towards comics for grown up people. I have compared the attitudes among the staff in two public libraries in Sweden, Malmö public library and Lund public library. I have conducted five interviews with librarians and observed how the comics are handled in each library. I have also carried out a literary study of the history and theories of comics. Initially a definition of comics is presented, and then an overview of the development of comics and of some theories regarding them is offered.

Image editing software offers unlimited possibilities to alter an image. Provided that digitalinnovation is not altogether positive, it is important to develop knowledge of its negative sides. Thispaper examines the use of digital image processing from a critical IS perspective. Throughqualitative interviews with professional retouchers, the study provides a picture of their ethicalrelation to the software they use for retouching images in advertising. Though, it turns out that thecustomers who order the retouching holds responsibility for what is altered.

Master thesis work at ITN (Department of Science and Technology) in the areas of A/D-construction and RF-circuit design. Major goal of project were to research suitable possibilities for implementations of direct conversion in transceivers operating in the 160MHz band, theoretic study followed by development of components in the construction environment Cadence. Suitable A/D- converter and other important parts were selected at the end of the theoretic study. Subsampling technique was applied to make A/D sample requirements more realistic to achieve. Besides lowering requirements on A/D-converter it allows a more simple construction, which saves more components than subsampling adds.

Sound surrounds us in a great extent, we all have experiences of sound and this phenomena has a great meaning in our lives. High levels of sound might be harmful for your hearing and might also cause related difficulties such as tinnitus and sensitivity to sound. Studies reveal a connection between the attitudes toward high levels of sound and the risk behaviours in these situations. The purpose of this study was to explore the experiences and meaning of sound and whether the attitudes toward sound will reflect in a family consisting parents and adolescents. A family consisting two parents and two adolescents participated each and one of them in an interview in this qualitative study that has been carried out of a phenomenological approach.

The purpose of this study was to examine young offenders? attitudes towards crime, and to the penalty they have been sentenced to as juveniles. More specifically its aim was to examine an intervention program called Galaxen, specifically used  to deal with  juveniles  in Växjö. This intervention program consists mainly of conversations with social workers from social services,  aiming  towards  better  self-awareness  and  the  ability  to  understand  the  consequences  of one?s actions.