One of the areas of language, now seen as part of language competence in the light of new theories of language proficiency, is textual competence with two subcomponents: coherence and rhetorical organization. The present study is an attempt to measure Iranian EFL learners' knowledge of rhetorical organization through Structured and unStructured summary writing, and seeks to find out whether text type and test format affect learners' performance on summary writing tests. The validity and reliability of the two test formats are also compared with each other.The results obtained confirm the effect of text type and test format on learners' performance on a summary writing test verifying Kobayashi (2000) and Bachman's (1990) assertions about the effect of text structure and test method on learners' test performance. A significant interaction between text type and test format is also found. Concerning the validity and reliability of the two test formats, higher concurrent validity and inter and intra rater reliability indices are registered for Structured summary writing. However, both test formats show a low face validity index.

The water level control in boiler drums is a crucial process in many process industries. In industries, water spillage or overheated tubes of the water boiler are the serious consequences of extremely high or low-level drum water level maintenance. The boiler drum is a MIMO system, consists of dead time nonlinearity and thereby there exists a transportation lag between the input and the system. Also, they possess high dynamic variations. Hence, the control of the boiler drum level is of great importance. Though, conventional PID controllers are employed in industries, due to the presence of nonlinearity, boiler drum performance can be affected when it is controlled by a PID controller. Moreover, the PID controller produces a larger settling time. Here, a robust controller for the boiler drum level control based on the H-infinity technique is designed. The first-principle mathematical model of the boiler drum is formulated. The uncertainties namely: Structured uncertainty, unStructured uncertainty, and nonlinear uncertainty are modeled by incorporating the boiler drum dynamics including its inherent nonlinearity. The boiler drum level control is carried out using the H-infinity controller scheme with the uncertainties accounted for and the performance is compared with that of a conventional PID controller. The qualitative and quantitative comparison of performances of the above control schemes reveals that the H-infinity controller has a quick rise time and faster settling time.

Introduction: Play is one of the methods for teaching the necessary movement, emotional and social skills, and Structured play is the basis for children's normal communication and learning processes. Aim: The purpose of this study was the effectiveness of a selected movement program of Structured, unStructured, and mixed on the social and psychological development of children aged 4-6 years. Method: The present research method was semi-experimental with a pretest-posttest design. The statistical population included children aged 4-6 years in district-5 of Tehran in 2020. The statistical sample included 60 children who were randomly selected and divided into three groups of 20 children. The studied groups trained for 12-weeks according to their implementation protocol, two session’s per-week and one-hour per-session. The research groups completed Vineland Social Development Questionnaire (1989) and Children Psychological Development (2010) before and after the intervention. A mixed ANOVA and Bonferroni post-hoc tests were used to analyze the data. All statistical analyzes were performed using SPSS version-26 software. Results: The results showed that for social and psychological development, the main effect of levels and the interactive effect of group levels were significant (P<0. 05), but the main effect of group was not significant (P>0. 05). The results of the Bonferroni post hoc test showed that there was a significant difference between the mixed and Structured groups (P<0. 05), but no significant difference between the unStructured and Structured groups and between the mixed and unStructured groups (P>0. 05). Conclusion: Based on the results indicating the effectiveness of the mixed exercises on psychological and social development, it is suggested that professionals and physical education teachers use these protocols to improve and promote these skills.

In this paper two automated and robust algorithms for generation of unStructured grids suitable for multiscale finite volume method in oil reservoirs are presented. The multiscale finite volume method is an efficient numerical method for flow simulation in porous media. The multiscale finite volume method has been extensively studied on Structured grids. In this research multiscale finite volume method is extended to unStructured grids. Development of the MSFV method to unStructured grids provides advantages of flexibility and compatibility with geological structures. In this method calculations are carried out on three grids, fine grid, primal coarse grid and dual coarse grid. One of the main challenges to extend the multiscale finite volume method to unStructured grids is to generate primal and dual coarse grids. In this paper an algorithm for partitioning of unStructured grid and generating primal coarse grid is proposed. Also, a new algorithm for generating dual coarse grid is presented. Finally, the proposed algorithms for generating multiscale unStructured grids are employed for flow simulations in porous media. Numerical results show that the multiscale finite volume method with generated multiscale unStructured grids of this research can accurately predict the fine scale solution.

As Grid systems are distributing geographically, the heterogeneity and dynamicity of their resources are increased. One of the important issues is the discovery services with more scalable and dynamic environments. In this paper, we review the decentralized discovery mechanisms based on peer-to-peer (P2P) technology. We classify the discovery approach into three main categories: UnStructured, Structured, and Super-Peer. We describe the major development in these three categories and provide a discussion in term of efficiently, scalability, and dynamicity features of these approaches.