1. Introduction The popularity of wireless devices, such as laptop computers, mobile phones, personal digital assistants, smartcards, digital cameras etc. is rapidly increasing. Their computing capabilities are growing quickly, while their size is shrinking, allowing many of them to become more and more part of everyday life. These devices can be connected to wireless networks of increasing ban...

From December 2002 to June 2003 I participated in the design, development, and deployment of software for a mobile data card service provider in Tokyo, Japan (henceforth referred to as Company J). Mobile data cards can be plugged into laptop computers or PDAs to enable Internet access via cellular dial-up or, more recently, WiFi. A customer purchases both a card and a service plan from Company ...

A planar monopole antenna suitable for broadband wireless communication is designed and developed. With the use of a truncated ground plane, the proposed printed monopole antenna offers nearly 60% 2:1 VSWR bandwidth and good radiation characteristics for the frequencies across the operating band. A parametric study of the antenna is performed based on the optimized design, and a prototype of th...

Many contemporary servers, personal and laptop computers, and even cell phones are powered by highperformance superscalar processors.A growing body of work has compiled a strong case for employing microarchitecturally diverse superscalar cores in both general-purpose and embedded systems. • Future general-purpose microprocessors will consist of many cores. This makes it possible to provide mult...

The European research project OverDRiVE aims at, among other goals, developing IPv6 protocols to support mobility of hosts, as well as of networks, that are deployed in vehicular environments. The scenarios considered in OverDRiVE envision that future vehicular environments in trains, ships or cars provide on-line information to the driver and passengers; moreover, in some cases, provide even a...

In this paper the elements of the CAPTCHA usability are analyzed. CAPTCHA, as a time progressive element in computer science, has been under constant interest of ordinary, professional as well as the scientific users of the Internet. The analysis is given based on the usability elements of CAPTCHA which are abbreviated as user-centric approach to the CAPTCHA. To demonstrate it, the specific typ...

We discuss micro-mobility, which is the study of the interrelated movements of people, devices, and other actors at a local scale. We also describe an ongoing study that makes use of highly accurate sensing technology to record the paths of residents and their wireless laptop computers. The data from the sensors, along with household interviews, allows us to explore the patterns of everyday beh...

The availability of wireless network connections to laptop computers and PDA’s has created interest in the issues surrounding mobile computing. However, enabling users to be genuinely mobile in their work requires more than a wireless connection. Distributed system services are needed to support the locating of people, equipment and software objects, and, especially for mobile multimedia applic...

Users of three-dimensional computer-aided design (CAD) and gaming applications need to manipulate virtual objects in up to six degrees of rotational and translation freedom (DOF). To date, no 3D controller provides one-handed 6DOF input with miniature size and low cost. This paper presents a prototype of the first one-handed 6DOF motion controller suitable for use in portable platforms such as ...

In this paper, we describe the IBM MASTOR, a speech-to-speech translation system that can translate spontaneous free-form speech in real-time on both laptop and hand-held PDAs. Challenges include speech recognition and machine translation in adverse environments, lack of training data and linguistic resources for under-studied languages, and the need to rapidly develop capabilities for new lang...