With the miniaturization of projection technology, the integration of tiny projection units into mobile devices is no longer fiction; therefore, such integrated projectors in mobile devices could make mobile projection ubiquitous. These phones will have the ability to project large-scale information onto any surfaces in the real world, and by doing so, the interaction space of the mobile device...

In cellular networks, blocking occurs when a base station has no free channel to allocate to a mobile user. One distinguishes between two kinds of blocking, the rst is called new call blocking and refers to blocking of new calls, the second is called handoo blocking and refers to blocking of ongoing calls due to the mobility of the users. In this paper, we rst provide explicit analytic expressi...

Advances in wireless communication technology allow the development of distributed robotic applications consisting of teams of autonomous mobile units that can cooperate to achieve a common goal. Real-time communication among mobile wireless units, however, requires a careful management of the shared channel in order to achieve a certain level of predictability in message exchanging. This paper...

The paper aims to describe in some details a system called Mobile Eldit (m-Eldit) that is under development at the University of Trento, Italy. It is a mobile version that can be accessed from mobile devices like PDAs, of an existing language learning platform, developed at the European Academy of Bolzano, Italy. The paper also gives description of the theoretical bases behind the system – a ge...

Despite the increasing number of e-music downloads and the large use of mobile devices, the mobile music market is slowly taking off. Prices seem to be the main burden: compared to the wired environment, a song is twice or three times more expensive. Furthermore, mobile network transfer data rate causes the download time to be very long. In this paper we propose Bluemusic, a multi channel archi...

Scarcely is GPRS on the market, before the next development, EGPRS, appears on the horizon. EGPRS is intended to achieve data rates up to 364 kbit/s, thus also covering typical 3G applications. With a view to fast data transmission, network operators in North America in particular have shifted their focus from TDMA IS136 to GSM in recent months, and so given extra impetus to the GSM850 and EGPR...

Future telemedicine systems will exploit mobile communications technology so that patients who are free to move around at home or at work, or in emergency medical situations, can be monitored in a hospital. At present, the GSM mobile telephone cellular network is limited to 9.6 kbps, but with the introduction of the third generation (3G) network, data rates of 144 kbps will be available, giving...

Enterprise users require mobility and secure connectivity when they roam and connect to the services offered in the enterprise. Secure connectivity is required when the user connects to the enterprise from an untrusted network. Mobility is beneficial when the user moves, either inside or outside the enterprise network, and acquires a new IP address. This document describes a solution using Mobi...

In this paper, we develop a new method for Wheeled Mobile Robot (WMR) fault detection. Specifically, we develop kinematic and dynamic models of the WMR in the presence of faults such as a change in the wheel radius (e.g., deformation, broken spoke, flat tire) or general kinematic disturbances that model slipping or skidding faults. Utilizing the WMR models, we employ a torque filtering techniqu...