This paper was made together withTechPay AB, by their request.The dissertation has been divided into two separate parts; one of which is fully theoretical, with the focus on the security requirements of a digital cash register, and how to meet these requirements.The second part covers the implementation of anAndroid-oriented Java-library,created with help from the security requirements found in the first part. The purpose of this library is to make it easier to develop a cash register that uses payment terminals from TechPay.This paper also covers different communication protocols, encryption techniques and recommendations from authorities, banks and Android. This paper also contains a small review of how users are validated in applications on the current market that handles money transactions..

In this study, we investigate various lighting applications in a virtual environment, where we compare between light based in naturalism (natural light) and pictorialism (artistic light). The purpose of this study is to gain further knowledge in lighting, which is increasingly important for game graphics. Theory are examined to gather information and recommendations on how to use various light settings that convey different emotions. We then use this information to illuminate the environment that we have built. The environment is presented in Unreal 4 for respondents who are allowed to move around freely in the environment.

Due to excess precipitation that cause runoff, all soils in Sweden naturally leaches nitrogen.High leaching from arable land is an environmental problem when the runoff reacheswaters. In the international agreement, Baltic Sea Action Plan, the aim is to reduce therunoff of nutrients. Sweden has agreed to reduce its load of e.g. nitrogen to the Baltic Sea.One of the proposed measures is an increased use of site-specific N-fertilization, which hasbeen shown to increase nitrogen use efficiency and therefore also reduce the nitrogen runoff.Either yields are increased with the same total amount of nitrogen, or the total quantityof nitrogen is reduced with preserved yield levels, which is profitable for the farmers.The dynamics of nitrogen leaching differs between top dressing applications above orbelow the economical optimum. There is a consensus about a difference in the dynamics,but not about its magnitude.

Syfte och frågeställningFöreliggande studies syfte var att jämföra den mobila syreupptagningsutrustningen Oxycon Mobile [OM] vid rodd på roddergometer vid mätningar inomhus och utomhus. Frågeställningen var om OM visar jämförbara värden mellan inomhus- och utomhusmätning vid standardiserad arbetsform. MetodSju manliga roddare från nationell och internationell elit rodde vid två tillfällen 4x4 minuter med stegrande belastning (+30 W) på submaximal (SMx) belastning följt av 4 minuter maximal belastning (Mx) på roddmaskinen Concept 2 modell D. Testtillfället inomhus genomfördes i välventilerad lokal och utomhus genomfördes testet under tak med tre öppna väggar med temperatur 20,5 ± 0,9 respektive 15,3 ± 1,9° C och luftfuktighet 50,2 ± 7,5 respektive 61,0 ± 8,5 %. För att mer likna rodd utomhus på vattnet simulerade en fläkt den fartvind som uppstår vid rodd på vattnet. Syreupptagning (VO2), respiratorisk kvot (RER), ventilation (VE), hjärtfrekvens, takt och skattad ansträngning i ben och andning på Borg skala (RPE) mättes.

This thesis describes the development ofa linear guidance system suited for NORCAN's aluminium profiles. The work took place at LP Innovation, a small technical consulting company, located in Uppsala. The work started with gathering and searching for information. A lot of the information was found in product catalogs, but my supervisor was also a great source of knowledge, as well as the other engineers at the company. I also had the opportunity to work with the rea lprofiles, to get a feeling and greater understanding how they were supposed to be used. With the use of sketching and CAD, a number of concepts were generated.

In industry applications, such as power supply plants, the issue of interaction between fluid and structure is always presented. More precisely, the fluid flow affects the structure by applying force(s) on it and vice versa. As a result, the structure can move (vibrate) or deform. A good understanding of this problem can help to design the system in term of safety, stability and efficiency.This project aims to optimize and test the Unicorn FSI solver from the FEniCS project [1] to simulate the interaction of fluid and structure in an experiment, which was carried out at Vattenfall Research and Development. The target is to improve the Unicorn FSI solver to cope with a real industrial problem.

The purpose of this thesis is to compare if a charter company's attitude and vision of service can be reconciled with the attitudes and visions that the customers have in the same area. In order to carry out the study a qualitative approach is used. The data has been collected by interviews, focus groups and observations. The framework is theories on the subject of customer satisfaction, quality of service at customer meetings, Self-Service technologies, quality assurance and gap in service.The study has concluded that the approach to service is relatively equal between the company and customers, but the future visions differ. Focus group participants have been thinking bigger and further into the future, while the company focuses more on specific functions.

Heat, clock scew and frequency optimization are some of the problems a semiconductor designer must face. By splitting a synchrounous block into multiple pieces which comunicates asynchronously with eachother and provide them with independent clocks, these problems may be reduced. GALS (Global Asynchronous Local Synchronous) is a wrapper that wraps a synchronous block and provides it with a clock. Multiple GALS-elements will make the whole system. The clockfrequency may be independently adjusted between each block.

Syftet med uppsatsen är att analysera mobil operatörernas behov att omsätta och värdera sig till de teknologiska förändringar ch marknadsförutsättningar genom att lägga fram alternativa affärsmodeller. Nya nätverk och teknologier håller på att förändra den stabila mobiltelefonimarknaden och därmed branschförhållandena för opertörerna. För att inte tappa marknadsandelar och attrahera nya kunder måste de vara proaktiva i med sina strategier vilket inte är falle idag. Vi har i analysen kommit fram till tre olika affärsmodeller vi anser vara lämpliga att ta i beaktning vid anpassning till de kmmande marknadsförhållandena..

Minskad effektförbrukning har blivit mer och mer intressant i takt med att fler produkter blir mobila. I artikeln Parallel Implementation of Linear Feedback Shift Registers for Low Power Applications, beskriver Menahem Lowy en metod för att konstruera slumptalsgeneratorer. Dessa är tänkta att vara effektsnålare än en vanlig enkel slumptalsgenerator, med återkopplat skiftregister. I det här examensarbetet har sex slumptalsgeneratorer konstruerats i VHDL. Två är baserade på Lowy?s metod och två är parallella varianter av dessa.

This paper examines the potential benefits of using augmented reality as a tool for visualizing furniture in a buyer?s own environment before buying it. A simple prototype is developed and tested.  The steps for developing the prototype are described in great detail as well as the tools being used. The prototype is tested both on people working in the furniture business as well as people with experience in buying furniture online. In conclusion the results from the user tests are analyzed and the potential benefits are described.

Planet rendering plays an important role in universe visualization and geographic visualization. The recent tools and methods allow better data acquisition, usually with very high resolution. However in computer graphics, there is always the limitation on the resolution of geometry and texture due to numerical imprecision. Not many applications can handle high resolution data effectively.This thesis introduces, Implicit Surface Scene, a level of detail scene management inspired by dynamic coordinate system and SCALEGRAPH? which change over time depending on the current camera position relative to the planet surface.

The objective of this project was to develop an application for mobile phones using the Android operating system. The main goal was, with the help of GPS, to pinpoint locations, measure distance traveled and illustrate the progress on a map. Functionalities for just showing the map, fetching addresses and saving to a database was also implemented. The result of the work was a proper application, called MeasureApp, that fulfills the goals set in the planning stages of the project. MeasureApp can be used to measure distances where accuracy is not a main factor, i.e walks or runs.

Purpose: Exploring the relatively new technology of convolution reverb, to gather knowledge on its limitations when used practically in the production of pop music, and from these findings to learn about applications in other performing arts and sound design. Methodology: This is a case study of creating convolution reverb by doing impulse responses (IR) and then applying them to studio recorded pop music. The empirical data consists of the final song results, notes and journals from during the process and the comparisons, as well as established litterature on acoustics, psycho-acoustics and music production. Results: Convolution reverb can widely and freely be used in the production of music and other audio-based art forms, since our study shows that the result of a well-made impulse response from a particular room is indistinguishable from music that is actually played and recorded in the same space..

Den elektroniska handeln har varit på framfart i många år, den erbjuder stora potentiella affärsmöjligheter för företag. Med hjälp av internet kan företag idag erbjuda produkter och tjänster till kunder över hela världen. Elektronisk handel kan också erbjudas via mobiltelefoner, även kallat mobilhandel. Den handeln har i Sverige haft en trög tillväxt jämfört med den elektroniska, en förklaring till detta kan vara säkerhetsaspekten. Flera forskare uttrycker att det råder en osäkert hos konsumenten i transaktionsutförandet.