This paper revisits the induced innovation literature of the 1960s to which Phelps was a major contributor (Drandakis and Phelps, 1965). This literature was the first systematic study of the determinants of technical change and also the first investigation of the relationship between factor prices and technical change. I present a modern reformulation of this literature based on the tools devel...

CSCW systems provide computer support to facilitate cooperation between users. This paper proposes an approach to the formal speciication of security requirements for CSCW applications, where a CSCW application is viewed as a collection of activities that users may participate in. The speciication approach is straightforward, and can be used to capture a wide variety of security requirements, i...

Permission is herewith granted to university to circulate and to have copied for non-commercial purposes, at its discretion, the above title upon the request of individuals or institutions. This page has been deliberately left blank iv Acknowledgements I would like to convey my heartfelt thanks to Prof. Antonio De Maio, with whom I was privileged to work. I express him gratitude for providing m...

This paper is focused on receivables management and possibilities how to use available information technologies. The use of information technologies should make receivables management easier on one hand and on the other hand it makes the processes more efficient. Finally it decreases additional costs and losses connected with enforcing receivables when defaulting debts occur. The situation of u...

Many business enterprises are characterized by their dynamic nature and transient work arrangements. This in turn requires computer support that goes beyond workflow systems. Instead it is necessary to provide support for process emergence and collaborative work with continually varying team members. Focused organization collaborative work is increasing with work becoming more knowledge intensi...

Self (1999) argues that the essence of having a computer-based learning system that “cares” about its learners is that the system model its learners so as to be able to adapt to their needs. In this paper we discuss the notion of personal agents who care for their “owners” by representing the owners’ interests in the learning system. We contextualise this discussion by showing how such personal...

CSCW systems provide computer support to facilitate cooperation between users. In this paper we propose an approach for the formal speciication of func-tionality requirements and conndentiality security requirements of a CSCW application. These requirements give rise to safety and conndentiality properties that a CSCW system, supporting the application, should uphold. The speciication technique...

This paper describes research-in-progress that examines the dynamics of hybrid R&D organizations in high-tech industry, and compares them to hybrid research organizations in academia. Our preliminary definition of “hybrid organization” is based on funding: it is an enterprise that receives revenues from commercial activity (in goods and/or services), but that primarily sustains its R&D work thr...

This study was designed to ascertain the challenges of improvising instructional materials by Home Economics teachers at the Upper Basic education level in Nigeria, and as a result identify strategies for enhancing improvisation. The study used survey research design based on two research questions. The sample was four hundred and thirty-one Home Economics teachers in Upper Basic schools in Ana...

This paper presents an evaluation instrument for hypermedia courseware. Its design is based on an evaluation framework developed from the integration of a number of important issues emerged from research on instructional design and system evaluation the past fifteen years and is concerned with both social and practical acceptability of hypermedia courseware. The term social acceptability is rel...