Gary Bronson

Improving system performance for stochastic activity network: A simulation approach

An activity network with returning loop activities has a wide variety of applications, but can cause a heavy computational burden for large networks. Moreover, if an activity processing time and/or the probability of taking a particular activity changes when the number of activity visits is added, the computation is very complicated and difficult. We propose a simulation approach to deal with stochastic activity networks consisting of multiple terminal nodes, no limit on looping activities, non-constant activity selection probabilities, and non-deterministic activity times following arbitrary distributions. Probability and time control functions are introduced to reflect the acceleration, or learning effect, of repeated activities. Performance measures such as system success/failure probabilities, time to completion/success/failure times, time between success/failure, and the pth percentile times of a project are obtained. A series of sensitivity analysis was performed to understand the trend and behavior of system performance. A cost function is developed to find an optimal strategy by manipulating control factors. To illustrate the efficacy of this simulation approach a new drug discovery and development project was analyzed. The Promodel simulation language was used for performance evaluations, and the SimRunner optimization tool for obtaining the optimal solution.

Evaluating the Usability of E-Voting Technologies

Voting has been an accepted means for electing candidates, receiving public approval for referendums and budgets, and for many other tasks where the will of the people, whether a broad population or a select group, can be recorded and measured in a tangible way. Because of advances in technology, together with problems inherent in manual forms of voting, the concepts and issues relating to electronic voting (e-voting) and various other technology-based forms, are been proposed, discussed, and examined. The goal of all such systems is the casting and recording of the votes from eligible voters as they intended to be cast, with adequate security. This security requires that there be no identifiable connection between the voter and the vote that is cast, while providing an audit trail that can be used to validate that every vote was counted and tallied, as cast. The focus of this paper is to examine electronic voting technologies from the perspective of usability in controlled environments. Current research has shown that such systems form the majority of the nascent e-voting technologies, primarily because they have come closest to solving the usability and security issues inherent in technology—based voting systems.

E-Voting Technologies Usability: A Critical Element for Enabling Successful Elections

The focus of this paper is to examine electronic voting technologies from the perspective of usability in controlled environments. Voting has been an accepted means for electing candidates, receiving public approval for referendums and budgets, and for many other tasks where the will of the people, whether a broad population or a select group, can be recorded and measured in a tangible way. Because of advances in technology, together with problems inherent in manual forms of voting, the concepts and issues relating to electronic voting (e-voting) and various other technology-based forms, are been proposed, discussed, and examined. The goal of all such systems is the casting and recording of the votes from eligible voters as they intended to be cast, with adequate security. This security requires that there be no identifiable connection between the voter and the vote that is cast, while providing an audit trail that can be used to validate that every vote was counted and tallied, as cast. Current research has shown that such systems form the majority of the nascent e-voting technologies, primarily because they have come closest to solving the usability and security issues inherent in technology-based voting systems.

Effective Knowledge Management Using Wikis

This paper presents a discussion and in-depth exploration of using Wikis for providing support to, and for the effective maintenance of, knowledge management systems. Specific issues, considerations, and relevant areas for which Wikis can be most effective are addressed. This includes identifying both strengths and weaknesses of Wikis as they apply to the various types of knowledge management requirements, including information capture, retention, dissemination, updating, and security concerns. A conceptual and research framework of the major impacts, challenges, and issues is also presented, as well as areas for future research.

Teaching Excel using incrementally reinforced project sets

Excel has been and continues to be an important component of business curriculums. This paper presents an innovative methodology for teaching Excel spreadsheets, consisting of mutually reinforcing sets of case studies. Each set contains a number of integrated and interlocking projects, where one project is designed to introduce one or more topics, and subsequent projects within a set are used to reinforce and incrementally add depth to the topic(s) under consideration. Flexibility, based on time constraints, individual student needs and classroom settings is maintained. The results, benefits, and implications of this method to teaching spreadsheets are discussed.