Evaluating Higher Diploma in English Language Teaching for the Primary Stage from the Teachers' Perspectives

Hashem A. Alsamadani International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.9

This study aims to evaluate the Higher Diploma in English for the Primary Stage from the diploma students' perspectives. A questionnaire was designed consisting of 25 items distributed in two areas: cognitive/academic preparation and professional/skill preparation. The following statistical analyses were used: means, standard deviations, t-test, and one-way analysis of variance (ANOVA). The study results showed that the level of evaluation of the two domains in the program was low. The study also showed no statistically significant differences between the means of educational diploma students when evaluating the Higher Diploma in English for the Primary Stage due to their academic specialization (Arabic language, social sciences, and Islamic studies). In conclusion, the researcher suggested a developmental mechanism derived from the study results to improve the higher Diploma in English for the Primary Stage.

Investigating loading rate and fibre densities influence on SRG - concrete bond behaviour

Hashem Jahangir,Mohammad Reza Esfahani 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.34 No.6

This work features the outcomes of an empirical investigation into the characteristics of steel reinforced grout (SRG) composite - concrete interfaces. The parameters varied were loading rate, densities of steel fibres and types of load displacement responses or measurements (slip and machine grips). The following observations and results were derived from standard single-lap shear tests. Interfacial debonding of SRG - concrete joints is a function of both fracture of matrix along the bond interface and slippage of fibre. A change in the loading rate results in a variation in peak load (Pmax) and the correlative stress (σmax), slip and machine grips readings at measured peak load. Further analysis of load responses revealed that the behaviour of load responses is shaped by loading rate, fibre density as well as load response measurement variable. Notably, the out-of-plane displacement at peak load increased with increments in load rates and were independent of specimen fibre densities.

Comparing type-1, interval and general type-2 fuzzy approach for dealing with uncertainties in active control

Hashem Shariatmadar,Farzaneh Shahabian Moghaddam 국제구조공학회 2023 Smart Structures and Systems, An International Jou Vol.31 No.2

Nowadays fuzzy logic in control applications is a well-recognized alternative, and this is thanks to its inherent advantages. Generalized type-2 fuzzy sets allow for a third dimension to capture higher order uncertainty and therefore offer a very powerful model for uncertainty handling in real world applications. With the recent advances that allowed the performance of general type-2 fuzzy logic controllers to increase, it is now expected to see the widespread of type-2 fuzzy logic controllers to many challenging applications in particular in problems of structural control, that is the case study in this paper. It should be highlighted that this is the first application of general type-2 fuzzy approach in civil structures. In the following, general type-2 fuzzy logic controller (GT2FLC) will be used for active control of a 9-story nonlinear benchmark building. The design of type-1 and interval type-2 fuzzy logic controllers is also considered for the purpose of comparison with the GT2FLC. The performance of the controller is validated through the computer simulation on MATLAB. It is demonstrated that extra design degrees of freedom achieved by GT2FLC, allow a greater potential to better model and handle the uncertainties involved in the nature of earthquakes and control systems. GT2FLC outperforms successfully a control system that uses T1 and IT2 FLCs.

Predicting Audit Reports Using Meta-Heuristic Algorithms

Hashem Valipour,Fatemeh Salehi,Mostafa Bahrami 한국유통과학회 2013 유통과학연구 Vol.11 No.6

Purpose - This study aims to predict the audit reports of listed companies on the Tehran Stock Exchange by using meta-heuristic algorithms. Research design, data, methodology - This applied research aims to predict auditors reports’ using meta-heuristic methods (i.e., neural networks,the ANFIS, and a genetic algorithm). The sample includes all firms listed on the Tehran Stock Exchange. The research covers the seven years between 2005 and 2011. Results - The results show that the ANFIS model using fuzzy clustering and a least-squares back propagation algorithm has the best performance among the tested models, with an error rate of 4% for incorrect predictions and 96% for correct predictions. Conclusion - A decision tree was used with ten independent variables and one dependent variable the less important variables were removed,leaving only those variables with the greatest effect on auditor opinion (i.e., net-profit-to-sales ratio, current ratio, quick ratio, inventory turnover, collection period, and debt coverage ratio).

Measuring functional polycentricity developments using the flow of goods in Iran: a novel method at a regional scale

Hashem Dadashpoor,Sadegh Saeidi Shirvan 서울시립대학교 도시과학연구원 2019 도시과학국제저널 Vol.23 No.4

The debate concerning the polycentricity concept and its related methods has led to numerous studies. However, these studies have focused less on the analysis of polycentricity in developing countries, such as Iran, which is peculiar because of its various socioeconomic and political features. Also, while most of the current studies have measured the polycentricity at one time, only a limited number of them have paid attention to the longitudinal perspective. Thus, this paper intends to examine functional polycentricity developments by exploring a novel method on a regional scale. To do this, we have applied a dynamic method in the case of Iran to measure the polycentricity by using data concerning the flow of goods. Our findings indicate that the polycentricity index of the system raised from 0.24 to 0.81 over a 15-year period. Therefore, theoretically, the spatial system moved towards more polycentricity. The outcome of the socioeconomic flows in Iran was such that they continuously reduced the distance between centres and reproduced moves towards a more polycentric pattern.

Embryotoxic and Teratogenic Effects of Tartrazine in Rats

Hashem, Mohamed Mohammed,Abd-Elhakim, Yasmina Mohammed,Abo-EL-Sooud, Khaled,Eleiwa, Mona M.E. Korean Society of ToxicologyKorea Environmental Mu 2019 Toxicological Research Vol.35 No.1

Tartrazine (TAZ) is one of the most commonly used artificial dyes for foods and drugs. We determined the effect of TAZ on fetal development by examining morphological, visceral, and skeletal malformations in rat fetuses following daily oral administration of TAZ to pregnant Wistar rats at the 6th-15th day of gestation. TAZ at 0.45 and 4.5 mg/kg induced 6.0 and 7.1% fetal resorptions, as well as 10.0 and 10.5% fetal mortality, respectively. Fetal body weight and length were significantly lower in the groups treated with TAZ at 0.45 ($3.97{\pm}0.21g$ and $27.3{\pm}0.54mm$, respectively) and 4.5 mg/kg ($3.48{\pm}0.15g$ and $23.22{\pm}1.02mm$, respectively) than in the control group ($4.0{\pm}0.15g$ and $30.01{\pm}0.42mm$, respectively). TAZ at 0.45 and 4.5 mg/kg induced hepatic damage (20 and 33.3%, respectively), dark brown pigmentation due to hemosiderin in the splenic parenchyma (16.7 and 21.7%, respectively), as well as destructed and necrotic renal tubules (16.7 and 26.7%, respectively) in the fetuses. Moreover, TAZ at 0.45 and 4.5 mg/kg caused one or more missing coccygeal vertebrae (20 and 40%, respectively), missing sternebrae (6 and 10%, respectively), missing hind limbs (24 and 4%, respectively), and irregular ribs (16 and 20, respectively) in the fetuses. We concluded that TAZ has embryotoxic and teratogenic potentials in rats.

Analytical and experimental studies for deformation of circular plates subjected to blast loading

Hashem Gharababaei,Abolfazl Darvizeh,Mansour Darvizeh 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.9

In this paper, experimental responses of the clamped mild steel, copper, and aluminum circular plates subjected to blast loading are investigated. Extensive experimental results concerning variations of central deflection are presented. Approximate energy analysis is used for the analytical modeling of the mid-point deflection thickness ratio of the circular plates. The essence of the model is to describe the deformation profile, which depends on the distribution of impulsive load. By using the present modeling, one can show how the midpoint deflection varies with the variations of the important parameters. The results obtained from the present model show very good agreement with the experimental data.

Bond strength characterization and estimation of steel fibre reinforced polymer - concrete composites

Hashem Jahangir,Danial Rezazadeh Eidgahee,Mohammad Reza Esfahani 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.44 No.6

Composite materials are effective in forming externally bonded reinforcements which find applications related to existing structures repair, attributed to their high strength-to-weight ratio and ease of installation. Among various composites, fibre reinforced polymers (FRP) have somewhat been largely accepted as a commonly utilized composite for such purposes. It is only recently that steel fibres have been considered as additional members of the FRP fibre family, intuitively termed as steel reinforced polymer (SRP). Owing to its low cost and permissibility of fibre bending at sharp corners, SRP is rapidly becoming a viable contender to other FRP systems. This paper investigates the bond behaviour of SRP-concrete joints with different bonded lengths (50, 75, 100, 150 and 300 mm) and widths (15, 30, 40, 50, and 75 mm) using single-lap shear tests. The experimental specimens contain SRP strips with a fixed density of steel fibres (0.472 cords/mm) bonded to the face of concrete prisms. The load responses were obtained and compared in terms of corresponding load and slip boundaries of the constant region and the peak loads. The failure modes of SRP composites are discussed, and the range of effective bonded length is evaluated herein. In the end, a new analytical model was proposed to estimate the SRP-concrete bond strength using a genetic algorithm, which outperforms 22 existing FRP-concrete bond strength models.

Effect of gas detonation on response of circular plate- experimental and theoretical

Hashem Babaei,Tohid Mirzababaie Mostofi,Seyed Hamidreza Sadraei 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.56 No.4

A series of experimental results on thin mild steel plates clamped at the boundary subjected to gas detonation shock loading are presented. Detonation occurred by mixing Acetylene (C2H2)-Oxygen (O2) in various volume ratio and different initial pressure. The applied impulse is varied to give deformation in the range from 6 mm to 35 mm. Analytical modeling using energy method was also performed. Dependent material properties, as well as strain rate sensitivity, are included in the theoretical modeling. Prediction values for midpoint deflections are compared with experimental data. The analytical predictions have good agreement with experimental values. Moreover, it has been shown that the obtained model has much less error compared with those previously proposed in the literature.

Factors Predicting the Physical Activity Behavior of Female Adolescents: A Test of the Health Promotion Model

Hashem Mohamadian,Mohammad Ghannaee Arani 대한예방의학회 2014 예방의학회지 Vol.47 No.1

Objectives: Physical activity behavior begins to decline during adolescence and continues to decrease throughout young adulthood. This study aims to explain factors that influence physical activity behavior in a sample of female adolescents using a health promotion model framework. Methods: This cross-sectional survey was used to explore physical activity behavior among a sample of female adolescents. Participants completed measures of physical activity, perceived self-efficacy, self-esteem, social support, perceived barriers, and perceived affect. Interactions among the variables were examined using path analysis within a covariance modeling framework. Results: The final model accounted for an R2 value of 0.52 for physical activity and offered a good model-data fit. The results indicated that physical activity was predicted by self-esteem (β=0.46, p<0.001), perceived self-efficacy (β=0.40, p<0.001), social support (β=0.24, p<0.001), perceived barriers (β=-0.19, p<0.001), and perceived affect (β=0.17, p<0.001). Conclusions: The findings of this study showed that the health promotion model was useful to predict physical activity behavior among the Iranian female adolescents. Information related to the predictors of physical activity behavior will help researchers plan more tailored culturally relevant health promotion interventions for this population.