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Problem statement This thesis work was initiated since there are problems with the navigation devices currently used by SEMC, Sony Ericsson Mobile Communications AB. The problems with the currently used navigation devices are lack of ability to keep dust out and they don’t meet the demands from future applications like scrolling through large amounts of data, image editing and advanced web browsin

With many Internet services, it is necessary to distribute information to clients as soon as it is available. Information should not only be delivered, it should be delivered as soon as possible. An example is weblog monitoring. As a weblog is usually updated irregularly, it is impossible to know when to check for updates. Clients do not want to waste resources on checking for new entries, they wa

A mobile phone has several buttons/keys e.g. numerical keys, side keys, camera buttons and navigation keys. SEMC, Sony Ericsson Mobile Communications AB, has mainly used the joystick and the rocker key as their navigation devices since they released their first phone in 2002. These technologies are used in all their phones except smart phones, e.g. W950 and P990. During the years SEMC has experien

As more functionality and complex systems are combined in limited settings the need for resource management is becoming increasingly important. Resources such as computing capacity, battery power and communication channels need to be divided between different applications and hardware to achieve the highest global performance. Traditionally the computing capacity has been handled by the system sch

This thesis presents an implementation of a positioning and navigation system for a mobile robot using ultrasonic pulses and passive sensors that are part of a sensor network. The system uses the Telos Tmote Sky sensor-boards running Contiki. In addition to the Tmote Sky the mobile robot consists of a number of processors and is equipped with position encoders for the wheels in order to be able to

As a part of the RUNES project a robot has been developed and it has as a part of this theses been improved with an obstacle avoidance component. Work has also been done to make room for additional components on the Tmote sky (one of the micro controllers mounted on the robot) such as a power control component developed at KTH. Attempts has also been made to try to enhance the performance of the r

Executive Summary Title Business Models for Mobile Internet Authors Andersson Tobias, Talborn Henric, Weikert Magnus Directors Professor Allan T. Malm Ph D Candidate Magnus Wide Purpose How should mobile operators design their business models for mobile Internet in order to be successful? Method The method used in order to reach the purpose is structured in, theory, empirical and analysis around t

Mobile Stroke Units (MSUs), which are specialised ambulances equipped with brain imaging devices and trained medical personnel, offer the potential for rapid on-site diagnosis and treatment, improving patient outcomes in prehospital stroke care. To fully realise their benefits, it is essential to strategically allocate. However, identifying optimal locations within a region for MSU deployment is t

In this paper we are focusing on the practical, engineering way of evaluating and characterizing the multi-channel antenna solutions on the mobile terminal. Two methods of calculating the parameters, describing the diversity performance, are described and the practical use of the methods in simulations and measurements are presented and evaluated. The time saving aspect of using the scattering par