درخت حوزه‌های تخصصی

Unlike many arbitrations, the arbitration procedure for price reviews in gas industry contracts is not based on allegations that one party has breached a contract or otherwise committed a legal wrong. Instead, arbitrators are asked to determine whether the economics of a contract has been changed in the market, and thus should be adjusted and, if so, to establish a new price formula. Due to the complexity of revision of gas prices, the gas experts have significant role in these arbitrations. Regarding the role of gas experts, gas price arbitrations have specific nature. In this article, the nature of these arbitrations is examined to establish whether they are arbitration or expert determination as one of Alternative Dispute Resolutions (ADR). As Iran has the second proven natural gas resources worldwide and is the third natural gas producer in the world, so, Iran- Turkey case will come under scrutiny in this article.

Today, the strategy of outsourcing management, in economic enterprises and especially in government organizations, is one of the most important issues in the field of procurement chain management and Strategic Alliance Management. This issue is of special importance in public organizations and institutions. Because these organizations usually have a wide range of missions and supply chains, and according to macro policies and strategies, they need a comprehensive plan for outsourcing. Despite this importance, few studies have addressed the models of outsourcing development in firms. The purpose of this paper is to explain the model of outsourcing development management in the oil and gas industry, based on using content analysis method and deductive approach to the theoretical framework developed in practice through case analysis in Iranian Gas Transmission Company as the company with the most physical assets control on Iran. With this aim, the information required for the research, in addition to the researchers' observation and reviewing the related documents, was obtained through interviews with a significant population of senior managers and experts in the Iranian oil and gas industry. Using theme analysis method, this information was analyzed and the expected situation of the outsourcing development management in the industry, and the impact and interactions, were described and explained.

The research on the Markowitz model and optimization of its portfolio using a variety of evaluation indicators and meta-beta-algorithms has always been the focus of attention of accounting and finance researchers. The results of studies carried out by various types of optimization methods are different in the Markowitz modified models. The purpose of this study is to measure the optimal portfolio and its corresponding return, with respect to the portfolio in the traditional Markowitz model, as well as to compare the position of the refining and petrochemical companies versus stock market outperformers, through integrating the operational criteria and the new indicators of liquidity using the genetic algorithm in the Markowitz model. Therefore, financial data related to the research variables for 35 cases of TSE-listed refinery and petrochemical companies from 2012 to 2016 fiscal years were extracted from Rahavard Novin database software and simulated by the genetic algorithm. The results show that returns on the stock portfolio optimized using the genetic algorithm and without considering the liquidity limitations and filters have a significant and positive difference with the return on the stock portfolios optimized with regard to the liquidity limitations and filters. Furthermore, the application of liquidity limitations and filters in the formation of optimal stock portfolios leads to a conservative increase in the choice of stocks (portfolio formation), which leads to a reduction in the risk and return of investment in such portfolios.

As reflective practice has become an influential factor in teacher professional development, teachers need some techniques to enhance their reflective teaching. In this light, this study was intended to examine: (a) whether self-evaluation techniques could promote English as Foreign Language (EFL) teachers’ reflective teaching, (b) whether EFL teachers who used self-evaluation techniques would differ from the teachers who did not use them in the 5 aspects of reflection (practical, cognitive, affective, metacognitive, and critical), and (c) whether EFL teachers’ years of experience and gender would make a significant difference in their degree of reflectivity. To these ends, 20 male and female Iranian EFL teachers participated in the study with its pretest posttest control group design and responded to Akbari, Behzadpour, and Dadvand’s (2010) Teacher Reflectivity Questionnaire. Unlike the control group, the experimental group employed 3 self-evaluation techniques of video recording lessons, advance organizers, and colleagues’ reviews. Results from a one-way analysis of covariance, a one-way multivariate analysis of covariance, and a two-way analysis of variance revealed that the self-evaluation techniques significantly improved the EFL teachers’ reflectivity. Also, the self-evaluation techniques made a significant difference in the practical, cognitive, metacognitive, and critical aspects of the teachers’ reflection. However, the EFL teachers’ years of experience and gender did not make a significant difference in their degree of reflectivity. The findings encourage EFL teachers to join other stakeholders to evaluate and reflect upon their own teaching for positive changes in EFL classrooms

Academic writing is not just about presenting a set of ideas, but through the act of writing, the authors position themselves as individuals having particular identities which mostly reflect the dominant sociocultural values and practices of the discourse communities in which they are living and performing. The present study, using a mixed method approach, attempted to explore the evidences of voice and subject positioning, as reflections of authorial identity, in the argumentative writings of 41 advanced Iranian EFL learners. At first, the relationship between voice intensity and overall writing quality of the participants was assessed and the results indicated a positive relationship between the constructs. The multiple regression analysis conducted also revealed that assertiveness, as one of the main subcomponents of voice in writing, had the highest level of contribution in accounting for the writing competence of the learners. Afterwards, some representative instances of subject-positioning (i.e., ideational, interpersonal and textual) in the written texts were identified and discussed based on the ideological context of the study since it is believed that authorial identity and voice can vividly reflect the overall ideology of the specific discourse community in which they are constructed. Finally, it was suggested that raising the awareness of learners and even instructing them about the significance of authorial identity, voice and subject-positioning in writing can assist them in constructing more authentic texts in terms of idea presentation, consideration of readers and specific textual and linguistic features used.