Många av dagens dator och TV-spelsljud är anpassade för högtalaruppspelning, i många fall även flerkanalssystem som 5.1 surround och liknande. Få spel är anpassade för uppspelning genom hörlurar och för att få en bra ljudlokalisering i hörlurar behövs ofta någon form av surroundhörlurar. Vi tror att man kan skapa trovärdig (Riktnings)återgivning av ljud i hörlurar genom bara två ljudkanaler genom så kallat binauralt ljud. Vi kommer i detta arbete att beskriva de faktorer som spelar roll i vår stereohörsel, varför de fungerar samt vilka svagheter som finns i detta system. Vi kommer att skapa ett system för att behandla realtidsgenererat binauralt ljud för spel och beskriva de verktyg vi valt och den generella arbetsprocessen.

The aim of this study is to evaluate whether the value of occupant load is over or under estimated when the Swedish general value for department stores, 0,5 person/m2, is used for dimensioning shopping centers. The data that was analyzed derives from seven shopping centers and one department store. A conservative method was used to calculate the occupant load factor. The analysis shows that two groups can be discerned: one group that is characterized by a lower occupant load factor that does not exceed 0,3 person/m2, and one group with a higher occupant load factor. Shopping centers with a higher occupant load factor are located centrally in large urban areas.

Familjeutredare på akut- och utredningshem är en yrkesgrupp som arbetar med utredning av föräldrars omsorgsförmåga. I arbetet träffar familjeutredaren dagligen människor som befinner sig i svåra livsskeenden. Detta ställer krav på familjeutredarens förmåga att hantera emotioner. Studiens syfte var att bidra till en djupare förståelse för familjeutredares emotionella lönearbete, vilka emotionella krav som ställs och hur de hanterar det. Studien utgick från Grundad teori (GT) och datainsamling innefattade sju semistrukturerade intervjuer.

The purpose of this essay was to examine whether there were any differences in social workers way of investigating boys and girls, age 13-15. The main questions we wanted to answer were; which were the factors that the social workers focused on? Did the investigations lead to a measure and if so, which one? How were risk and protection factors described and ana-lysed?To answer our questions we read and analyzed 22 reports, written by social workers 2004 at the department for teenagers and families at a social welfare service in Sweden. We came to the conclusion that there were some differences, but these were few and not extensive. Recreational activities was mentioned in a higher degree in the boys reports while health, housing conditions and network were mentioned more often in the girl´s reports.

This thesis investigates how Ericsson AB should do to achieve fast and secure handover when roaming in a WLAN. It also provides a security analysis of the system that the wireless access point is part of. The reason for this is that Ericsson is selling an access point called the ABS 2200 aimed at the public hotspot market. The premise was that they wanted a standardized way of handling the roaming issue. At the outset the 802.11F standard looked like a good alternative (in fact the only standardized alternative).

This degree project has been carried out in cooperation with Gedevelop in Helsingborg.Gedevelop has developed a camera that can calculate the weight of a liquid glass mass.Because of the density and viscosity changes in the glass, the weight information issometimes incorrect given. Glass industry is today addressing the problem by an operatorperforming a manual weighing of a few bottles which, in turn, calibrates the camera system.The project aimed to develop an automated system to control the weighing of glass bottles forglass industries. This system must be so flexible that it can be easily mounted on plants withdifferent production equipment around the world.The project includes design and construction of equipment that meets the requirementsformulated together with Gedevelop. Work has been done both in Halmstad and Helsingborgand has included both calculations and review of the theory to understand the forces thatinfluence the design of different construction parts. A prototype was produced that meets theoperating requirements for the design and can be used in testing features.

This study is an attempt to examine the information needs and use in everyday tasks inthe work environment of community health nurses. The purpose of this paper is double toexamine the information need and use of the community health nurses and to test and validatea method and a theory for the studying of information need and use in workers everydaytasks adapted from Byström and Järvelin (1995). Most of the data were collected throughdiaries kept by the informants in close relationship to the problem situations and were analysedqualitatively. Furthermore a literature survey was made in nursing infomatics and informationscience and it showed that there is no absolute common ground between the disciplinesin the way they use the information concept.The theory and method were validated in a broad outline and were very useful in the study ofcommunity health nurses' information needs and use. The study also shows that the contextof community health nurses plays an important role in the nurses information behaviour..

Abstrakt Klämning mellan dörrblad och dörrkarm är en frekvent förekommande olyckstyp som drabbar såväl barn som vuxna i alla åldrar. I genomsnitt drabbas var fjärde svensk någon gång under sin livstid av så pass allvarliga skador till följd av klämning i dörr, att sjukhusvård krävs. Som regel är det handens fingrar som skadas. På marknaden finns ett stort utbud av tekniska lösningar som i någon mån syftar till att förhindra klämskador i kontakt med dörrar. Dock är de flesta av dessa lösningar utformade för dörrens gångjärnssida.

Since the beginning of the twenty-first century, China has captivated global attention due to its astonishing economic growth. This development has resulted in an enormous growth in foreign direct investments, as well as the country?s new role aseconomic super power. When joining the World Trade Organization in 2001, China agreed to adhere to the minimum requirements of the organization?s several multilateral agreements.

Abstrakt Klämning mellan dörrblad och dörrkarm är en frekvent förekommande olyckstyp som drabbar såväl barn som vuxna i alla åldrar. I genomsnitt drabbas var fjärde svensk någon gång under sin livstid av så pass allvarliga skador till följd av klämning i dörr, att sjukhusvård krävs. Som regel är det handens fingrar som skadas. På marknaden finns ett stort utbud av tekniska lösningar som i någon mån syftar till att förhindra klämskador i kontakt med dörrar. Dock är de flesta av dessa lösningar utformade för dörrens gångjärnssida. För dörrbladets låssida existerar inget klämskydd som kan göra anspråk på att vara heltäckande.

Camera surveillance can provide good protection against certain types of crime, but it can also invade our privacy. The County Administrative Board monitors compliance with the rules by visiting those places to which the general public has access. They have to issue permits before general camera surveillance to those places which the general public has access. In certain cases, in stores for example, general camera surveillance is permitted only if the Country Administrative Board is notified in advance. The Data Inspection Board is a public authority and responsible for the camera surveillance for those places to which the public not has access.

Today we see a fast developing of the market for mobile communication, both in an increased and changed mobile use, but also in the development of new technologies and services. Much that can be performed on Internet/Intranet today with a PC will in some years also be possible to do with a mobile terminal. Mobile Internet will probable take place when new technologies as GPRS, EDGE and UMTS will be in use. These technologies in combination with the development of new terminals and services will bring new capabilities for both companies and private users. This report describes how a portal should be designed in order to meet the needs on the market.

In this paper I study how the repeal of the Swedish wealth tax (1 of January 2007) has affected people´s labour supply behaviour. This particular issue is relevant because it may help us understand some of the effects of the earnings tax changes that have taken place in Sweden. Accoring to standard economic theory a repealed wealth tax is similar to an income effect for the persons who previously paid the tax. That means that they theoretically will want to consume more leisure, that is decrease their labour supply. The method I am using to test this hypothesis is a difference-in-difference approach where the treatment group consists of persons who previously paid the tax and the control group of comparable persons who did not pay the tax.

Idén till detta arbete uppstod som en följd av att vi på den fartygsförlagda praktiken upptäckt att kunskapen om katodiskt korrosionsskydd är mycket bristfällig hos många ombordanställda. Vi har även gjort en mindre undersökning bland yrkesverksamma maskinister för att se hur kunskapsnivån inom detta område ligger ombord. Undersökningen visar att vår hypotes om kunskapsnivån stämde till stor del. Ytterliggare ett skäl till att vi studerat det här området är att vi själva har velat fördjupa oss i ämnet, då våra egna erfarenheter endast varit att skriva av siffror från en display. Vår huvudfrågeställning har varit, Hur fungerar katodiskt korrosionsskydd ombord på fartyg? För att få svar på denna frågeställning har vi bedrivit litteraturstudier inom ämnet.

This thesis describes a method of measuring axial magnetic leakage flux in an operational hydropower generator. Axial magnetic leakage flux is the magnetic flux at the ends of a rotating generator, which goes through the stator parallel to the rotor axis. This flux can cause circulating currents in the stator iron, giving rise to losses, and can in the worst case overheat a generator, causing it to melt down. To measure the axial flux, and how it affects the generator temperature, a measurement system was constructed on behalf of Vattenfall. The system consists of search coil sensors and a signal-processing unit with amplifiers and active filtering.  To confirm the behaviour of the axial leakage flux and the functionality of the measurement system, a test installation was made.