We present a framework to measure empirically the size of indirect network effects in hightechnology markets with competing incompatible technology standards. These indirect network effects arise due to inter-dependence in demand for hardware and compatible software. By modeling the joint determination of hardware sales and software availability in the market, we are able to describe the nature...

PURPOSE Handheld computers have potential to improve HIV/AIDS programs in healthcare settings in low-resource countries, by improving the speed and accuracy of collecting data. However, the acceptability of the technology (i.e., user attitude and reaction) is critical for its successful implementation. Acceptability is particularly critical for HIV/AIDS behavioral data, as it depends on respond...

PURPOSE To review the different data collection options available to school-based researchers and to present the preliminary findings on the use of audio-enhanced personal digital assistants (APDA) for use in school-based data collection. METHODS A newly developed APDA system was used to collect baseline data from a sample of 645 seventh grade students enrolled in a school-based intervention ...

This paper describes the concept of a mobile Information System which will be implemented at the Faculty of Business, Economics and Information Systems at the University of Regensburg. The prototype „U-Know“ („Ubiquitous Knowledge Management“) will enable typical functions of Knowledge Management Systems for mobile devices such as Mobile Phones and Personal Digital Assistants. In this way facul...

One of the most promising methods of interacting with small portable computing devices, such as personal digital assistants, is the use of handwriting. In order to make this communication method more natural, we proposed to visually observe the writing process on ordinary paper and to automatically recover the pen trajectory from numerical tablet sequences. On the basis of this work we develope...

This paper describes some preliminary results from a 20-week study on the use of Compaq iPAQ Personal Digital Assistants (PDAs) by 10 senior developers, analysts, technical managers, and senior organisational managers. The goal of the study was to identify what applications were used, how and where they were used, the problems and issues that arose, and how use of the iPAQs changed over the stu...

In this paper, an example of pervasive computing in restaurant, a wireless web-based ordering system is presented. By using mobile devices such as Personal Digital Assistants (PDA) and WebPad, customers can get many benefits when making orders in restaurants. With this system, customers get faster and better services, restaurant staff cooperate more efficiently with less working mistakes, and e...

This Deliverable represents the successful production of the software for a small footprint agent shell. This agent shell is called MicroFIPA-OS. MicroFIPA-OS is a lightweight agent platform for small devices such as personal digital assistants. It is based on the component based FIPA-OS agent-programming toolkit. This Deliverable presents an overview of the MicroFIPA-OS system. MicroFIPA-OS an...

This paper describes our ongoing attempts to build a communityware system by presenting a project of providing digital assistants to support participants in an academic conference. We provided participants at the conference with a personal assistant system with mobile and ubiquitous computing technologies and facilitated communication among the participants. We also made online services availab...

With the rise of global networks like the Internet the importance of workflow environments is growing. Especially the combination with software agents allows to counter deficiencies of traditional client/server based workflow systems. In this setting new trends in hardand software such personal digital assistants (PDAs) and wireless technologies cause a change in the execution of workflow tasks...