The concept of demotivation and removing possible barriers of learning has been researched and advocated throughout the ESL/EFL literature but it seems that it has not been well studied at least on Iranian seminary EFL learners. As such, this study aimed at investigating the effect of demotivation on oral performance of Iranian EFL seminary learners and finding possible demotivating factors whi...

abstract portfolio definition is the most important decision for individuals and legal persons that invest in stock. the main objective of this paper is study and determination of optimal portfolio for stock of active food industrial company in tehran stock based on value at risk (var) index. for this purpose, we used weekly static of stock of active food industrial company in tehran from bahma...

This paper provides a review of the methods for measuring portfolio performance and the evidence on the performance of professionally managed investment portfolios. Traditional performance measures, strongly influenced by the Capital Asset Pricing Model of Sharpe (1964), were developed prior to 1990. We discuss some of the properties and important problems associated with these measures. We the...

Most people who contract with financial managers do not have much understanding of how much benefit paid support provides them in terms of investment return. Similarly, most people who manage their own portfolios do not know how well they are doing with respect to the rest of the financial market – they simply define a successful portfolio by a positive return on investment. The goal of this pr...

The present study was conducted to investigate the effects of dietary energy sourcesandlevels on performance and small intestinal morphology in broiler chickens. A total of 600 one-day-old broiler chicks were randomly divided into five treatments with four replicates each. Chicks were fed diet based on corn as main energy source and energy level based on Cobb 500 manual instruction considered c...

This paper introduces a simulation-based numerical method for solving dynamic portfolio optimization problem. We describe a recursive numerical approach that is based on the Least Squares Monte Carlo method to calculate the conditional value functions of investors for a sequence of discrete decision dates. The method is data driven rather than restricted to specific asset model, also importantl...

Markowitz model is the first modern formulation of portfolio optimization problem. Relyingon historical return of stocks as basic information and using variance as a risk measure aretow drawbacks of this model. Since Markowitz model has been presented, many effortshave been done to remove theses drawbacks. On one hand several better risk measures havebeen introduced and proper models have been ...

Efficient portfolio design is a principal challenge in modern computational finance. Optimization based on Markowitz two-objective mean-variance approach is computationally expensive for real financial world. Practical portfolio design introduces further complexity as it requires the optimization of multiple return and risk measures. Some of these measures are nonlinear and nonconvex. The probl...