the portfolio is a perfect combination of stock or assets, which an investor buys them. the objective of the portfolio is to divide the investment risk among several shares. using non-parametric dea and dea-r methods can be of great significance in estimating portfolio. in the present paper, the efficient portfolio is estimated by using non-radial dea and dea-r models. by proposing non-radial m...

the purpose of this research is to evaluate the ability of mutual funds investors to forecast the performance of mutual funds and selecting the best performed funds. it should be mentioned that both individual and institutional investors have been evaluated in this study. in order to answer the question whether the investors have the ability to forecast the performance of mutual funds or not, w...

This study compared the effectiveness of collaborative group composition and instructional method on reasoning gains and achievement in college biology. Based on initial student reasoning ability (i.e., low, medium, or high), students were assigned to either homogeneous or heterogeneous collaborative groups within either inquiry or didactic instruction. Achievement and reasoning gains were asse...

Investors use different approaches to select optimal portfolio. so, Optimal investment choices according to return can be interpreted in different models. The traditional approach to allocate portfolio selection called a mean - variance explains. Another approach is Markov chain. Markov chain is a random process without memory. This means that the conditional probability distribution of the nex...

This study investigates the effects of computer-aided videodisc-based anchored instruction on promoting elementary school students' problem-solving skills in Taiwan. Anchored instruction combines theories such as situated cognition, cognitive apprenticeship, cooperative learning, and constructivist theories. With the help of interactive videodisc and computer technology, anchored instruction pr...

OBJECTIVE To implement and assess a Web-based patient care portfolio system for development of pharmaceutical care plans by students completing advanced pharmacy practice experiences (APPEs) throughout a statewide preceptor network. DESIGN Using a Web database, students in APPEs documented 6 patient cases within 5 disease state categories. Through discussion of the disease states and inclusio...

Second or foreign language (L2) learners’ development of interlanguage pragmatic (ILP) competence to understand and properly interpret utterances under certain social and cultural circumstances plays a pivotal role in the achievement of communicative competence. The current study was designed to explore the effects of synchronous computer-mediated communication (SCMC) and asynchronous com...

the aim of the current study was to examine the effect of metacognitive instruction on efl learners’ metacognitive awareness of listening strategies, listening comprehension, and oral language proficiency. fifty students of two upper-intermediate english courses participated in the study and were sampled as the experimental and control groups. for sixteen weeks the experimental group participat...