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 aim of this thesis is to analyze and explain the similarities and differences in management control between a private and a public primary care company. A comparative case study was developed based on one public and one private primary care company in Stockholm County Council. The framework of Otley (1999) was used to define and limit the area of management control systems, according to his five factors. For the analysis of the empirical results Hood's (1995) seven doctrines of New Public Management was applied, and customized to fit the purpose of the study. The results indicate that the differences between the two organizations are very limited.

In the digitized world many organizations experience a large flow of information. To sort and manage all the information can be difficult. Individuals may experience a phenomenon called ?Information Overload?, due to the fact that the information flow is too extensive. There are various reasons why individuals are affected by this phenomenon.

I dagsläget finns ett problem med det fällbara kartbord som används i militära ledningsfordon. Större fokus på säkerhet och nya förhållanden har lett till att ett nytt bord behövs som är anpassat för den nya miljön och användarna. Arbetet har utförts i samarbete med BAE Systems Hägglunds och handlar omutvecklingen av ett nytt fällbart kartbord till det bepansrade bandfordonet BvS10 MkII.Utgångspunkten har varit att skapa ett mer användarvänligt bord som dessutom är billigare och väger mindre. Slutresultatet baseras till stor del av energonomianalys där höjd och lutning på bordsskivan analyserades med hjälp av datorsimulerade människor baserade på antropometriska data. Utöver ergonomianalysen har även ett koncept på fällning av bordet samt en hjälpmekanism till denna tagits fram.

Sun Microsystems chose its own Open Source path by not following competitors in their commitment toGNU/Linux. Sun instead created its own Open Source project from the source of Solaris under the name ofOpenSolaris. The business model of OpenSolaris belongs to the new and more commercially viable OpenSource, referred to as OSSg2. This survey was based on articles on the adoption of Open Source in organizationsand István Orci?s publication Kritiska IT-System.

With the volume and availability of information increasing as fast as technological development in society a phenomenon called information overload has emerged. The purpose of our thesis was to investigate how university students experience this increase in volume and ease in access to information. In our study we concentrated our focus on the student?s use of electronic resources. So as not to prejudice our study group our questions focused on different aspects of searching for information.

The Swedish energy companies have several different systems for data collection of the energy consumption of their clients. Often computerized remote meter readers are put in practice in order to register the energy consumption of large companies. The majority of household clients, however, are read off by the assistance of manual methods. Household power consumption is read off once a year. As a result, these clients are not debited for their actual consumption; their invoices during the year are the result of estimations.

This thesis deals with past and present political attitudes towards the Öresund bridge. It describes the decision making process which preceded the construction of the bridge, and has a short historical introduction to it. It then presents the attitudes towards the bridge of five different political parties, all represented by regional politicians. This empirical information was obtained through interviews with politicians and literature studies. The author then analyzes the empirical information with the help of the human ecological triangle developed by Steiner, and the center-periphery theories of Wallerstein and Persson.To conclude, the author describes what the central problem is in the case of the Öresund bridge from a human ecological perspective and analyzes the empirical data collected..

Over the past one hundred years, there has been an increasing globalization and industrialization of the food systems. As a result, the distance between the production and the consumption of food has increased, both in time and space and in the minds of people. There is also an increasing concern for the environmental effects of industrial farming and the long distance transportation of food. Sustainable agriculture and efforts to build more sustainable food systems has emerged in opposition to the global food market. The definitions of sustainability usually include environmental, social and economical aspects. To build more localized food systems is seen as one way towards increased sustainability.

This paper aims to investigate whether a small organization with small development teams can find a value in leaving a functioning development process to follow a formal systems development methodology, if these organizations can find support in an agile systems development method and in such case the method needs to be adjusted according to the organizations unique conditions.A traditional plan-driven system development methodology includes a number of phases that are carried out sequentially and a completed phase can basically not be resumed. All requirements are specified at the beginning of a project and at the end of the project only one delivery of software take place. This can cause difficulties in for example dealing with changing requirements. Agile system development methods intend to deal with changing requirements and to enable continuous delivery of valuable, working software.In this paper, both the traditional plan-driven methods and agile methods will be explained. Research methodology and existing system development theories will be discussed and a company where the study has been conducted will be presented.

The aim of this study was to explore the social background of the people convicted of drunkenness offence in the town of Ljungby between 1936 and 1947. Drunkenness offense was sentenced to those found drunk in public but also societys attempt to control the s subclass. This view was in contrast to the ideal of the well-behaved worker who also spread during the end of the last century. Based on information found in index cards for drunkenness offenses provided by Ljungbys temperance board this studie explores whether alcohol use changes in different social classes. By mapping the offender's profession, age, gender and housing situation, the study shows clear overrepresentation of working class men.

Numerical simulations play a vital role in both static and dynamic stability assessment of electric power systems and the foreseeing of voltage collapse. Simulations performed by Svenska Kraftnät(SvK) are mainly done in the specialized voltage collapse predicting software tool, SPICA and the more all?purpose software tool, ARISTO.The grid operators at SvK use SPICA to predict the maximum transfer limit at specified sections (in this report the section in concerns is the southern part of Sweden i.e. interface1 4). SPICA is mainly used as an online application by using actual states from the grid, these states update every quarter of an hour.This thesis is a continuation of the master thesis SPICA ? ARISTO JÄMFÖRELSE by Jakob Katzman and Johan Fält.

Att bedöma och betygssätta företags kreditvärdighet är en stor och vinstbringande marknad. Ett företags kreditbetyg har visat sig ha stort inflytande när t ex lånevillkor behandlas. Detta ställer höga krav på kreditvärderingsföretagens förmåga att leverera korrekta analyser. Såväl långivare som investerare reagerar på ett ändrat kreditbetyg, vilket ger direkta effekter på det företag som betygssätts. Kreditvärderingsföretagen har kritiserats bland annat för att inte svara tillräckligt snabbt på ny information.

The aim of this thesis is to examine how different kinds of information seekers are evaluating information quality in the information flow online. To address the problem stated, qualitative interviews were carried out with a librarian as a reference person and a group consisting of journalists and scientists. The result of the study implies that the reference person is well aware of the strategies employed by her in the search process. However, the respondents are not aware of the strategies they are actually using. An explanation is the respondents lack of education in information seeking.

Background: The increasing competition on the market demand both companies and supply chains to find optimal solutions. The edeavour to reduce inventory levels is a part of this. Earlier, inventory was seen upon as valuable assets, but today they tend to be more and more negative in the eyes of the companies. Inventory demands capital, handling, and space. Therefore inventory creates unnecessary costs.