Transaction execution in mobile environments needs to be flexible to support typical mobile computing characteristics, like movement, disconnections and limited resources, and also to support the variety of transactional properties that might be required by different applications. This paper proposes a solution for flexible transaction processing in mobile applications, and describes a middlewa...

Trajectory tracking is an important behaviour for mobile robots. This paper addresses the nonlinear trajectory tracking control problem for a nonholonomic car-like mobile robot with a constrained state. Compared with the existing works on the nonholonomic car-like mobile robots, the state constraint is emphasized in this work. The controllability of the system under the state constraint is chec...

The growth of the mobile network system of which the cellular systems like Global System Mobile Communications (GSM) and Personal Digital Cellular (PDC) are representative and the IP network attracts worldwide attention. The IP network access through the mobile data network system is required strongly to use the useful IP services anytime and anywhere. Therefore on the mobile data network syste...

This paper presents a development paradigm for Ethiopia, based on appropriate services and innovative use of mobile communications technologies via applications tailored for sectors like business, finance, healthcare, governance, education and infotainment. The experience of other developing countries like India and Kenya is cited so as to adapt those to the Ethiopian context. Notable applicati...

This paper presents experimental analysis of wheeled mobile robots. Mathematical modelling of the mobile robot is presented. The mobile robots consist of an omni-directional and three differential drive mobile robots are tested and moved in given trajectories and the systematic errors of the robots are determined. A new method for omni-direction mobile robot was introduced in which the robot wa...

Networking process, phone sensor like GPS reading, these mobile applications is much expensive in references of energy and due to this, mobile phone not much able to provide better mobile services to the user due to this embedded sensor. In order to provide better mobile application high capacity for computation is required and developer of mobile find many difficulties in the development of mo...

Mobile ad hoc networks (MANETs) are autonomous infrastructure less networks that can establish limited range, low cost networks for sharing data between devices. In MANET every node can access only local network but if a node in MANET want to access the Internet, it need to discover an Internet gateway. To discover the gateway, the node either may depend on periodic gateway advertisement or can...

Permanent Internet access enabled by mobile devices like mobile phones or PDAs is becoming more and more widely used. Mobile technologies open up new challenges for companies which want to benefit from mobile commerce (m-commerce). One of the most important commercial applications in this respect is marketing. Marketing instruments using mobile devices (m-marketing) allow innovative forms of cu...

Mobility of users, transmission of signals through open-air, the requirement of low power consumption by mobile users and smaller data storage area limitation in mobile equipment make mobile wireless networks more vulnerable to security threats like eavesdropping and unauthorized access. This paper proposes a new set of security protocols to enhance the access and data security features of GSM ...