This thesis investigates techniques for stealth hydroacoustic communication using Spread spectrum. The Swedish naval defense organisations have a vision that all their units should be able to communicate with each other, even between underwater vehicles. But the properties of water makes it a complex channel to use for wireless communications. Radiomagnetic waves have very limited range in water, therefore acoustic waves are used. In this report the basics of wireless communication systems are described including source coding, channel coding, modulation techniques as well as different techniques for Spread spectrum.

The purpose of this essay is to test for significance between TED- spread and four different macrovariables, housing prices, Federal funds rate, Asset Backes Securities and mortgage volume. Multiple regression has been used to search for significance between the dependent and the four independent variables. Our data consist of quarterly reports from January 1998 to June 2008. Our conclusion is that all of the four variables show a significant relation with TED- spread. The model explains 76 percent of the variation in TED- spread..

Syftet med uppsatsen är att skapa en modell som kan förklara yield spread hos företagsobligationer. För att få en modell som nära återspeglar verkligheten inkluderas både företagsspecifika och makroekonomiska faktorer. Vi utgår från en kvantitativ studie och tillämpat en multipel regression på paneldata innehållande 24 bolag för att förklara yield spread hos företagsobligationer. Den teoretiska referensramen består av forskningsartiklar från främst USA men även Europa som behandlar riskkomponenter hos yield spread. Empirin är kvartalsvis redovisnings- och handelsdata under tidsperioden 2001-2005 som samlas in från finansiella databaser och behandlas med regressioner.

This masters thesis deals with smoke spread via ventilation systems. One aim of the thesis is to investigate and explain the differences in efforts to prevent smoke spread via ventilation systems in different countries. A second aim of this thesis is to investigate how frequently occurring smoke spread via ventilation systems in Swedish buildings are. A third aim is to investigate how uncertainties in input variables to smoke spread calculations will affect the result of calculation. To be able to do this the most important input variables are identified and analysed.

The purpose of this study is to describe and analyze four educators? views and experiences of working with children with Autism Spectrum Disorders in relation to the concept of "One school for all". Research has shown that a segregating perspective is dominant in the school system, but the education act says that all children have a right to an equal education.My starting point for this study has been the concept of term "One school for all" and the problems that can occur in working with children with Autism Spectrum Disorders. A school for all is a school where all children are welcome and where all children sees as equals regardless of what background or disability they have. This study will be important for newly graduated teachers who are not aware of Autism Spectrum disorders.

The use of Spread spectrum signals has increased dramatically in military applications. Finding methods for detecting and positioning of these signals have become interesting research areas for signal intelligence purposes. One method is to measure the time difference of arrival (TDOA) that occurs when two receivers are synchronous and spatially separated. Based on the TDOA-technique an audio-demonstrator has been developed and implemented. This report describes the theory for how sound received in microphones can be used to extract information about the transmitter?s position from the measured time difference.

The parents of a developmentel disordered child live with much sorrow and anguish. Despite that, they often talk about hope, joy and love for their child. The autistic spectrum disorder includes different stands. Three of them are Autism, Aspergers syndrome and Disintegrative disability. An article overview has been made with the purpose to examine parents experiences of having a child that develops autism or a diagnosis within the autistic spectrum.

I have chosen to work with drag hose system and try to find an alternative to spread manure with a usually tank system, see if you can make a profit and what advantage and disadvantage the system has. The purpose whith the project has been to try to make a system that can spread manure at better occasions than farmers do today and above everything make a financial addition. Today it is just a heavy work and takes a lot of time. I have counted on investment costs and carefully examined what equipment you need. I have not the technical details in my project, I have just tried to understand how it is to spread manure with drag hose system today. What is drag hose system? You put a hose in your manuretank, connect it to a pump that is driven by a traktor or stationary engine. You place a hose that reach the field were you are going to spread.

AbstractThe purpose of this study is to investigate teachers? views on play as a method for developing pupil?s communication and interaction in schools for children with severe learning disabilities. I am interested in pupils with autism spectrum disorder and their opportunities for social interaction with peers in playful activities. I focus on the subject communication and the parts about speech, conversation and interaction. My study is based on a qualitative study.

Background: Society of today is characterised by greater dynamics and a constant demand for innovation and fresh ideas. This development is often named "the new economy" or "the knowledge society". Independent of how one chooses to name this society, most individuals seem to agree upon the fact that knowledge grows more and more important. New competencies, such as new knowledge and new forms of organising, will be demanded for corporations to be successful in the future. In recent years it has become more common with corporations based on projects.

I denna uppsats betraktas två olika bandspridningstekniker och vilken påverkan de har på telekrigsförmågan. Uppsatsen svarar på frågan:Vilka möjligheter finns att bedriva signalspaning och störning mot radiokommunikation som använder bandspridningsteknikerna frekvenshopp eller direktsekvens?Inledningsvis beskrivs en modell för telekrig mot radiokommunikation, ?telekrigcykeln?. Därefter beskrivs principer för ett radiosystem samt de två bandspridningsteknikerna frekvenshopp och direktsekvens. Slutligen analyseras bandspridningsteknikernas påverkan med hjälp av telekrigcykeln och resultaten diskuteras.Uppsatsen kommer fram till att båda signalerna går att spana mot, direktsekvens innebär större svårigheter för signalspaningen än frekvenshopp.

The purpuse of this study was to develop knowledge about learning condition that are to be in a context of interaction with persons that have Autism Spectrum Disorder diagnosis are included. The pre-understanding has evidence in that the public very often has a lack of knowledge in understanding persons with this kind of disabilities that can put the social interplay in disharmony. The phenomenological approach was used to reach the essence of the learning influence processes. Seen from the respondents experiences of interaction as a help for the informal learning in a working context. The purpose was to see the result of interplay and the effect of learning condition and to see what help those respondents acctually have experienced.

AbstractIn 2013, the diagnosis of Asperger?s syndrome will be eliminated as a stand-alone diagnosis, to be subsumed into the existing diagnosis of Autism Spectrum Disorder. In this paper, a study with the objective of emphasizing current opinions regarding the change in diagnosis is performed. Another objective is to examine the connection between identity and diagnosis. The study therefore targets people with a diagnosis, in this case Asperger?s syndrome.The empirical material of the study has been collected through a quantitative web-based survey.

The purpuse of this study was to develop knowledge about learning condition that are to be in a context of interaction with persons that have Autism Spectrum Disorder diagnosis are included. The pre-understanding has evidence in that the public very often has a lack of knowledge in understanding persons with this kind of disabilities that can put the social interplay in disharmony. The phenomenological approach was used to reach the essence of the learning influence processes. Seen from the respondents experiences of interaction as a help for the informal learning in a working context. The purpose was to see the result of interplay and the effect of learning condition and to see what help those respondents acctually have experienced.

Autistic Spectrum Disorders (ASD) är ett av de vanligaste intellektuella handikappen hos barn, ungdomar och vuxna. På grund av dessa patienters svårigheter att kommunicera och interagera med andra människor utgör de också en patientgrupp med ett speciellt omvårdnadsbehov och det finns ett behov av ökad kunskap hos vårdpersonal inför mötet med denna patientgrupp. Syftet med denna studie är att identifiera de specifika omvårdnadsbehov barn och ungdomar med ASD har i mötet med hälso- och sjukvård. Studien har utformats som en litteraturstudie där syfte och frågeställning har besvarats utifrån granskade vetenskapliga artiklar. Resultatet beskriver vilka specifika omvårdnadsbehov patienter med ASD har och på vilket sätt vårdpersonal kan vara förberedd inför mötet med barn och ungdomar med ASD och deras speciella behov..