It has been established that long term stress can lead to chronic illness of cardiac disease and vascular disorder. In the way people live their lives today they are surrounded by stress and they contribute to the stressful society when they constantly chase the time. The Mobile Life Centre explores how the system Aective Health can get people to reect up on their stress levels and connect that to their everyday activities by using bio sensors and a mobile phone. The bio sensor data visualization in the interface of the system is today tied to time. Since time is perceived dierently from person to person that is something that has caused problems for the design team of Aective Health. This thesis examines how dierent representations of time in user interfaces can be used to mediate the design qualities of subjective time, aliveness and uency in the Aective Health system. As a result from investigating the time aspect and how time can be visualized in a subjective way a suggestion for a design solution was developed.

The number of threats to computers attached to networks continually increases. The focus of preventing security exploits has been on the network, while local exploits has been mostly overlooked. Many security problems in Unix systems stem from the way security is managed; by delegating all security decisions to object owners. There are a number of security frameworks which aim to remedy this in Linux by restricting access to kernel objects, such as files. Ericsson is interested in finding the best possible security frameworks for use with their Linux products.In this thesis, the available security frameworks are evaluated based on criteria given by Ericson. First, the theoretical foundation of computer security is explored to serve for an overview of the security frameworks and their properties. Then specific attributes are refined and their values gathered from each framework. These attributes then serve as a basis for selecting two frameworks for further testing.The selected frameworks are  SELinux  and AppArmor, based on commerical support, ease of integration, and overall protection measures. Tables with the collected attributes are presented for comparison.The frameworks  TOMOYO and SMACK  should have been given more consideration. AppArmor is not useful for the server-centric environment used at Ericsson.

Global positioning systems have been having an increasing interest recently and been integrated and used in many applications to service positioning, navigation and travel planning. This project has set to design and test an interface of a travel planner for cell phones. A pre-study was made to investigate other travel planners to help the design of this application that has targeted a user friendly interface that people can use regardless of their background. A special feature, carpooling, has been introduced to ease the environmental, economical, and social aspects of navigation. The test was done as walk-through mockup images case scenarios. The test subjects were pleased with the interface’s friendliness, invoked carpooling issues, presented contradictory opinions regarding the interface's design, and offered future integration with other applications suggestions all of which were discussed. Overall, the test results were positive and few problems with the overall design were identified. A future study with more participants and a deeper analysis of the interface would be one way to further investigate the proposed interface.

This thesis presents a new robot design paradigm that utilizes evolutionary optimization techniques and advanced physics simulations. This technology makes it possible to design and test robots in virtual environments before the physical robots are built, which enables robot manufacturers to improve the performance of their products and decrease the time and cost for development. In this project, a 3D robot model was defined in geometric, kinematic and dynamic terms. Also, a piece of software was developed in C++ to optimize the robot design, and to simulate and visualize the robot model with the aid of a physics engine. A genetic algorithm was developed for the optimization and used to minimize the average positional error and the total torque magnitude under constraints on speed, and the design variables were the PID controller parameters and the torque actuator limits. Only predefined robots can be programmed and simulated with current software packages for offline-programming and robot simulation. It was concluded that such software packages can be improved by robot design optimization using the software developed in this project, by means of a genetic algorithm and simulations using a physics engine.

Location-based services often include showing Points-Of-Interest on a map and rely on the availability of geo-contextual data. In Pervasive Games, the players' context can be integrated with the game. Games of this character can be used in order to motivate users to collect Points-Of-Interest. This report describes the process of developing a concept and a working Android prototype where the users can have fun while creating Points-Of-Interest. A concept was developed by following the Design Process as well studying existing games and applications. The main goal of the project was to produce a prototype that is considered enjoyable by the users. The result is an Android prototype where the players can create, check-in, sabotage and upgrade Points-Of-Interest. In order to evaluate the game's perceived enjoyability, the Player Enjoyment Model for Pervasive Games was used. According to the validation of the prototype with the Player Enjoyment Model along with the conclusions from studies of similar applications, the authors believe the game has all the properties essential to an enjoyable game.

Real world military and civilian training causes hundreds of lethal accidents each year around the world. Until now the reality has been impossible to replace in civilian and military training. But with the emergence of serious games combined with the latest advances in 3d simulated environments Bohemia Interactive developed the COTS (Commercially Of The Shelf) game VBS2(Virtual BattleSpace 2). BAE Systems Hägglunds’ goal with this thesis is to investigate the potential of using VBS2 as the simulation platform in a new cost effective and realistic vehicle training systems. The major focus of this thesis is to find a way to control vehicles in VBS2. After evaluating the tools available during this thesis project DSF (Device Simulation Framework) is chosen to control VBS2. DSF is used to solve the problem by simulating a USB HID Joystick which controls VBS2 through DirectInput. This thesis therefore contains an in-depth study of the USB2.0 protocol, the HID protocol, and the DSF framework. The thesis shows in the end a prototype that can control VBS2 or any other game that supports DirectInput. The thesis also reveals a general design of the core of the vehicle trainer that connects the hardware simulator SimBas with VBS2.

Car brands are today competing over having the most advanced technology in their cars. The drivers today control the stereo which include radio, CD, MP3 and satellite radio. They also control the climate, the GPS, surf the Internet and show a DVD for the kids in the backseat and so much more from the centerstack. All these functions have clattered the center-stack with buttons, "smart" interaction knobs as well as scroll wheels. The buttons feel the same and thereby force the driver to change focus from the main-task, which is driving, to the center-stack. The same attention demanding situation are with the interaction knobs. In order to see the feedback the interaction knob provides, the driver needs to look at a screen located somewhere in the center-stack. World wide driver inattention causes around 60.000 deaths each year. This master-thesis describes the process of designing a non-distractive center-stack interaction. The reader will be introduced to the background of the problem, the dierent design suggestions that were taken into consideration as well as a given full presentation of the nal result. The paper also presents an in-depth study that provides a few guidelines for designing a detached touchscreen input from output.

This thesis report describes the design and implementation process for a graphical tool generating SQL-queries to extract data from a real estate business database. The software is intended to be used by customers of Vitec Fastighetssystem, a real estate software company. The report further explains the trade-off problem of complexity versus expressiveness and compares the design ideas with previous solutions to similar tasks. It also includes feedback and prototype evaluations by actual users. Concluding the thesis report is a presentation of a software solution and conclusions drawn from the project.

One of the most prominent trends of our time is the emergence of an information society. The amount of data available is absolutely surging, at the same time as we are becoming more and more dependent on constant access to updated and relevant information. To derive high quality information from a large quantity of textual data, we need efficient methods for structuring and querying the data. One way is to use the Vector Space Model (VSM), a mathematical way of representing the relationship between words and documents. Wellknown examples of this approach are Latent Semantic Indexing (LSI) and Random Indexing (RI). This thesis describes the implementation of an information retrieval system based on the VSM that uses fragments of parse trees to index data.

In game development, performance is everything and the Playstation 3 provides a unique platform for utilizing parallelization of code to achieve extremely high performance. In this master’s thesis the issue of animation with smooth skinning is migrated from being a GPU process to becoming a parallelized and 358% faster process. This method is incorporated in an existing commercial game engine and integrated in a currently in development title for the Playstation 3. An in-depth study covers parallel processors, the CELL processor, used in the Playstation 3, and how contemporary industry leading game developers are utilizing the same unique architecture to increase their own games’ performance.