In performance evaluation, it is important to identify both the efficient frontier and the critical measures. Data envelopment analysis (DEA) has been proven an effective tool for estimating the efficient frontiers, and the optimized DEA weights may be used to identify the critical measures. However, due to multiple DEA optimal weights, a unique set of critical measures may not be obtained for ...

the stock evaluation process plays an important role in portfolio selection because it is the prerequisite for investment and directly influences on the stock allocation. this paper presents a methodology based on data envelopment analysis for portfolio selection, decision making units which can be stocks or other financial assets. first, dmus efficiencies are computed based on input/output com...

This paper proposes a bacterial foraging based approach for portfolio optimization problem. We develop an improved portfolio optimization model by introducing the endogenous and exogenous liquidity risk and the corresponding indexes are designed to measure the endogenous/exogenous liquidity risk, respectively. Bacterial foraging optimization (BFO) is employed to find the optimal set of portfoli...

Recent thrust of research has focused on non-conventional classrooms for teaching to EFL learners. Amongst the newly developed models, Unplugged Classroom Model (UCM) is the most debated one as textbooks are aside and the syllabus is based on conversation-driven activities. This study sought to determine the pros and cons of unplugged teaching for enhancing EFL learners' oral proficiency. From ...

Marketing and R&D strategies need to be aligned to increase the return from investment in new technologies. Various portfolio techniques have been widely used to support strategic planning. A new portfolio approach integrating market and technology portfolios to support market-oriented R&D planning is developed. The integrated portfolio is based on objective market and patent data and empirical...

Outcome-based education is a topic of growing interest in educational circles today. More performance-oriented than traditional learning approaches, outcome-based education requires students to demonstrate what they know and what they can do. Because of this emphasis, outcome-based curricula will require new methods to assess student achievement. One approach is the portfolio, a repository that...

Writing is a critical literacy skill that emerges in kindergarten. The research literature has only addressed transcription skills of kindergarteners and failed to address text generation. purpose this action-research study was investigate the effect oral language instruction focused on narrative structures kindergarten students’ ability generate written text. We conducted concurrent multiple b...

this study focused on investigating the impact of keeping oral dialogue journals on efl learners’ oral fluency. sixty participants were ed out of 80 undergraduate freshmen who were studying english translation at sanandaj islamic azad university and pre-intermediate students at passargadeh jam language school based on their scores on a piloted proficiency test. they were then randomly divided i...