distributed, team-oriented work environment, it is critical that team members should be able to conduct multiparty, multimedia conferencing spontaneously. Spontaneous conferencing is analogous to ad-hoc, drop-in meetings and impromptu discussions in multi-person offices. The knowledge of the presence and availability of team members can be effectively used to facilitate spontaneous conferencing...

In grid environment, resources and users from different administrative domains are integrated and coordinated each other. Grid uses open standard, general-purpose protocols and interfaces to provide nontrivial quality of services. Videoconferencing is communication between two or more people from geographically different locations by simultaneous two-way video and audio transmissions. This is a...

BACKGROUND The great variety of portfolio types and schemes used in the education of health professionals is reflected in the extensive and diverse educational literature relating to portfolio use. We have recently completed a Best Evidence Medical Education (BEME) systematic review of the literature relating to the use of portfolios in the undergraduate setting that offers clinical teachers in...

Most of previous work on robust equity portfolio optimization has focused on its formulation and performance. In contrast, in this paper we analyze the behavior of robust equity portfolios to determine whether reducing the sensitivity to input estimation errors is all robust models do and investigate any side-effects of robust formulations. Therefore, our focus is on the relationship between fu...

We describe the design of a knowledge-building environment and examine the roles of knowledge-building portfolios in characterizing and scaffolding collaborative inquiry. Three classes of Grade 9 students in Hong Kong used Knowledge Forum (KF) under several design conditions. Results showed (1) Students working on portfolios guided with knowledge building principles showed more participation, d...

In this paper, we document that an application of a moving average timing strategy of technical analysis to portfolios sorted by volatility generates investment timing portfolios that substantially outperform the buy-and-hold strategy. For high-volatility portfolios, the abnormal returns, relative to the capital asset pricing model (CAPM) and the Fama-French 3-factor models, are of great econom...

Artists have maintained portfolios for years, often using their collection for seeking further work, or for simply demonstrating their art; an artist’s portfolio usually includes only their best work. Financial portfolios contain a comprehensive record of fiscal transactions and investment holdings that represent a person’s monetary worth. By contrast, an educational portfolio contains work tha...

This paper tests whether information advantages help explain why some individual investors concentrate their stock portfolios in a few stocks. Slock investments made by households that choose lo concentrate their brokerage accounts in a few stocks outperform those made by households with more diversified accounts (especially among those with large portfolios). Excess returns of concentrated rel...

Mimicking portfolios have many applications in the practice of finance. Here, we present a new method for constructing them. We illustrate its application by creating portfolios that mimic individual NYSE stocks. On the construction date, a mimicking portfolio exactly matches its target stock’s exposures (betas) to a set of ETFs, which serve as proxies for global factors, and the portfolio has ...