I detta examensarbete har det undersökts vilken teknik för trådlös kommunikation som passar bäst att användas då en ljudsignal ska strömmas trådlöst till multipla mottagare. De tekniker som jämfördes var Wi-Fi och Bluetooth. Andra tekniker för trådlös kommunikation, ZigBee, ANT+ och NFC, valdes bort för att deras maximala datahastighet eller räckvidd inte var tillräcklig. 3G och 4G valdes bort för att det krävs en licens för att få använda dessa. Som mottagare skulle i första hand Android- och iOS-mobiltelefoner användas.

The telecom and the IT-industry are converging, which creates new possibilities and threats for both existing mobile handset vendors and new entrants originating from the IT-industry. The purpose of this thesis is to explain how IT-players? entrance in the mobile handset industry affects the industry in regards of key success factors and value chain structure. This study has used dynamic theories to describe the mobile handset industry. The theories have helped us in understanding the characteristics and drivers of the industry and thereafter to identify the key success factors.

Title: The lost song. A study of a reconstruction process. I was asked by the daughter of the Swedish composer Svea Welander (1898 1985) for help to reconstruct a now lost song for voice and piano originally composed by her mother, where the melody of the song was used in the second movement of her first string quartett. The song was composed in 1955, words by Wilhelm Ekelund. My aim has been to describe the process of reconstructing the song.

The purpose of this thesis is to create opportunities for an efficient interchange of information between humans and technology, especially for the skilled user, and put the designprincipal for informative structures and features into practice. Informative structures and features in a large number of information items helps the peripheral visual system to automatically capture knowledge through logical patterns.A field experiment was done to evaluate if informative structures and features, implicate efficient human information-processing, even in a small study. The results was ambiguous because the quantitative part of the investigation didn?t show any significant differences, whereas the qualitative showed that people prefer a dynamic document with a high degree of informative structures and features over a dynamic document with a low degree of informative structures and features. Even if this study was inconsistent, probably because to few subjects where used, the implication of the research that?s behind it is solid.

Evaporation is a part of the chemical recovery department at wood pulping mills. The purpose of evaporation is to remove water from the black liquor, which makes the liquor combustible. The process is very energy demanding, and having a well-functioning model of the system is of greatest interest. The model can then be used to study energy consumption and to test different control strategies. Two models have been developed during the master thesis.

Cannibalism can have major influence on fish population dynamics. A prerequisite for cannibalism is that the cannibal and the potential victim meet, and besides density effects, the encounter rate between cannibals and their victims is therefore also largely dependent on habitat use and habitat heterogeneity. In this study I quantified and compared the potential for cannibalism in stream-dwelling European grayling populations in three rivers in Jämtland by means of habitat classifications. I also analyzed population dynamic consequences of varying the potential for cannibalism in terms of intensity, using a physiological structured population model. Findings based on habitat characteristics were that the potential for cannibalism is in general not favourable in these types of streams.

A survey was undertaken to understand sheep management, breeding practices and selection criteria for Red Maasai sheep in Maasai pastoralist communities in Kajiado District, Kenya. Differences between North and South Kajiado District were investigated to gain knowledge about farmers having different prerequisites and how it can affect the sheep production. The reason for keeping sheep and the specific breeds show the multiple objectives of the Maasai farmers. Adaptive traits, such as resistance to diseases and droughts, and productive traits, such as increased growth and carcass weight, were both ranked highly. In addition to this, the sheep has a social and traditional value in Maasai culture.

The purpose of this thesis was to analyse, model and finally generate dynamic vehicular motions in a train. The objective with the analysis was to find important motions for a realistic train experience. The motions from the analysis were then weighted against possibilities for generation in a motion platform.A dynamic motion model was created to model the selected motions. The model was implemented in a simulation environment, more specifically MATLAB/Simulink. The simulation environment was used to simulate the model and to generate outputs to control a motion platform.

Enligt Standish Group är det endast cirka 35 % av alla systemutvecklingsprojekt som avslutas på ett lyckat sätt när det gäller tid, budget och resurser. Inom systemutveckling är fastprisprojekt, där systemets kostnad är förbestämd, allt mer populärt. Dynamic Systems Development Method (DSDM) är en modell för utveckling som fokuserar på fasta resurser och tid med funktionalitet som den flexibla variabeln. Syftet med den här uppsatsen är att se om man kan driva fastprisprojekt med en modell som DSDM på ett sätt som gör det till en bra lösning för både beställare och leverantör.Min slutsats är att det största problemet med DSDM är att få beställaren att godkänna den som projektmodell. Ett annat stort problem är att många projekt med DSDM blir stressiga eftersom tiden är fast.

Vertical hydropower units has a rotating mass of up to 1000 tons. For the generator and turbine to work well the rotating system is required to be centered in relation to the surrounding structure. This is achieved by means of radial bearings. The dynamic characteristics of these bearings have a strong impact on the overall rotational dynamics of the total system and thus influence the vibrations in the unit. At Vattenfall Research & Development in Älvkarleby ongoing research is taking place on how the bearing parameters should be represented in the rotor dynamic calculations.

This thesis treats the subject of a complete steady state and dynamic model of the VSC-HVDC covering both the AC and DC system-side of the converter. The topology of the model is recreated after the scheduled transmission line in the south of Sweden, called SydVa?stla?nken. The topology covers both a simple two terminal connection as well as a multi-terminal one. This model is to be implemented in the power system simulation program ARISTO.

I det här arbetet har jag undersökt möjligheten att synkronisera lagrad kalenderdata mellan två olika system.Mitt arbete beskriver ett API, som i ena änden kommunicerar med Xcerion Baxide-Web Services, och i den andra änden med en mobil enhet med implementerat stöd för Exchange ActiveSync (t.ex. en iPhone eller Android).Med hjälp av Exchange ActiveSync-protokollet kan man synkronisera bland annat kalender, kontakter, e-post, anteckningar och påminnelser mellan flera klienter genom en Exchange Server. Dock hamnade all implementation utöver kalendersynkronisationen av Exchange ActiveSync redan från början utanför examensarbetets ramar.Microsoft tillhandahåller en mycket detaljerad dokumentation över Exchange ActiveSyncprotokollet. Dessutom, bland annat med hjälp av Microsoft Exchange Server 2010 och programmetWireShark kunde trafiken från en redan fungerande implementation av protokollet avlyssnas.Kommunikationen mellan en klient och en Exchange Server kan antingen ske över HTTP eller HTTPS där data transporteras kodat i WBXML. Av säkerhetsskäl är det dock rekommenderat att en Exchange Server inte tillåter trafik över HTTP.Innan själva implementationen analyserades protokollets struktur samt vilka nödvändiga metoder som behövdes för kalendersynkronisationen.

This thesis will show you how to build and construct a interactive website with a web shop and a web based administration system. The website is developed for a company called Varett. Varett will use the website to reach out for a larger group of customers and also for promoting new products. I have develop this site mainly using ASP, MS Access and HTML. I have also developed a graphic profile for the company to use at the homepage and at other commercial products.

Många barn har svårt att tillägna sig ett korrekt uttal och de kan uppvisa olika typer av uttalssvårigheter. Termen verbal dyspraxi används då uttalssvårigheterna är neurologiskt orsakade och den motoriska planeringen och/eller programmeringen av talets rörelsesekvenser är nedsatt. I tidigare forskning har behandlingsmetoden Dynamic Temporal and Tactile Cueing (DTTC) lett till förbättring av uttalet hos barn i 5-8 års ålder med verbal dyspraxi på stimuli (ord/meningar) som de har tränat på. Huvudsyftet i följande studie var att undersöka huruvida behandlingen har effekt på uttalet hos äldre barn med komplexa uttalssvårigheter inklusive verbal dyspraxi då behandlingen genomförs 20- 30 minuter, 3 dagar i veckan i 4 veckor. Åtta skolbarn (8-13 år) med nämnda svårigheter samt eventuell komorbiditet ingick i studien.

Today?s wind power plants are only compensated for their reactive power consumption at no-load. As the wind power plants grow bigger the amount of reactive power they need also increases. This is no longer a problem that can be ignored, especially as the net owners are beginning to charge the reactive power they transport.In this thesis a couple of different methods of compensation and their prices will be discussed and evaluated. Problems, such as self-excitation, that can occur if one fully compensates the wind power plant will also be brought to surface.