Many of our conversations are not planned. Instead, they arise opportunistically as we become aware of the common interests and goals of others. We believe communication tools can be built that leverage knowledge of a user’s goals and activities to make users aware of others relevant to them and their work, with the aim of facilitating this kind of opportunistic interaction. We describe a proto...

Existing adaptive educational hypermedia systems have been using learning resources sequencing approaches in order to enrich the learning experience. In this context, educational resources, either expository or evaluative, play a central role. However, there is a lack of tools that support sequencing essentially due to the fact that existing specifications are complex. This paper presents Seqin...

Digital attacks on organizations are becoming more common and more sophisticated. Firms are interested in providing data security and having an effective means to respond to attacks. Accountants possess important investigative and analytical skills that serve to uncover fraud in forensic investigations. Some accounting students take courses in forensic accounting but few colleges offer a course...

From a legal perspective, digital forensics is one of the most potent deterrents to digital crime. While more than a dozen definitions of digital forensics have been proposed in the last ten years, the one common element in all of them is the preparation of evidence for presentation in a court of law. In the courtroom, the expert forensic witness gives personal opinions about what has been foun...

The paper reviewed empirical studies on children’s school achievements. The contributions of parenting attitude and style were examined in relation to children’s school achievement. A strong relationship between children’s school achievement and parenting attitude and style was reported in the paper. Findings from the review revealed that authoritative parenting styles were associated with high...

Intrinsic motivation involves internally governed drives for exploration, curiosity, and play. These shape subjects over the course of development and beyond to explore to learn and expand the actions they are capable of performing and to acquire skills that can be useful in future domains. We adopt a utilitarian view of this learning process, treating it in terms of exploration bonuses that ar...

BACKGROUND The ability to use the Internet as a reporting tool has created important and timely changes in the way registries all over the world can collect data. This article provides a detailed description of the implementation that converted reporting hospitals in New York State from a manual, paper-based reporting system to an electronic, Web-based case reporting and communication system. T...

The basic structure parameters of lower tropospheric inversions (LTIs) have been derived from 10 years (1998–2007) of high vertical resolution (∼50 m) radiosonde observations over 56 United States stations. Seasonal and longitudinal variability of these parameters are presented and the formation mechanisms of LTI are also discussed. It is found that LTI seems to be a common feature over the con...

This paper is dedicated to the modeling of LTI continuous time systems in digital control loops. We consider the digital control problem on non-uniform sampling periods. Moreover we assume that time varying delays that may have a variation range larger than a sampling period affect the closed-loop. Our goal is to present a unique model that is able to include these problems simultaneously and t...

In this paper, we investigate several theoretical and computational aspects of fundamental subspaces for linear, time-invariant (LTI) descriptor systems, which appear in the solution of many control and estimation problems. Different types of reachability and controllability for descriptor systems are described and discussed. The Rosenbrock system matrix pencil is employed for the computation o...