مطالب

The present study examined the effect of four types of post reading-based tasks with different index of task-induced involvement load (Laufer & Hulstijn, 2001) on EFL learners’ recognition and recall of unfamiliar L2 vocabularies. To this end, 88 intermediate EFL learners were randomly assigned to four groups and were instructed to employ four different tasks after reading two narrative texts: (1) simple sentence writing; (2) text summary writing; (3) creative sentence writing; and (4) imaginary story writing. A day after the output activity session, the participants took two post-tests: the production test and the recognition test. Three weeks later, the delayed post-tests were administered. Mixed ANOVA (Split-plot) was run to compare the performances of the groups on immediate and delayed post-tests. The results revealed that there were overall significant within-group and between-group differences among four groups of the study both in immediate and delayed posttests. The creative sentence writing group outperformed in comparison to the other three groups. The results of this study turned out to be partially consistent with involvement load hypothesis.

The transformational leadership is known as one of the most important and effective factors on organizational behaviors of the employee. Creation of the motivation and energy in the employees requires a leader with inspirational qualities. On the other hand, the organizational citizenship behavior is a factor in shaping. The current study was aimed at investigating the effects of transformational leadership on the employees’ organizational citizenship behavior. In addition, some personality traits are revealed in this study to be one of the main factors shaping the behaviors and to be moderating variables. The current study is of applied type in terms of the objective and a descriptive-correlational study in terms of data collection procedures. The data needed for the purpose of the study were collected by the use of questionnaire distributed among The 242 persons of statistical population, and these data have been analyzed by Structural Equations Modelling. The results indicated that all six hypotheses of the study were approved. In other words, the transformational leadership has positive and significant effects on both individual and organizational aspects of the organizational citizenship behavior. Also, the positive moderating role of neuroticism and extroversion in effects of transformational leadership on the individual and organizational aspects of organizational citizenship behavior was approved. The results show that the statistical community can utilize its human resources potential to create competitive advantage and develop the voluntary activities of its employees, provided that it is able to optimally implement transformational leadership style.

In this paper, we focus on improving the performance of recommender systems. To do this, we propose a new algorithm named PBloofI which is a kind of hierarchical bloom filter. Actually, the Bloom filter is an array-based technique for showing the items’ features. Since the feature vectors of items are sparse, the Bloom filter reduces the space usage by using the hashing technique. And also, to reduce the time complexity we used the hierarchical version of bloom filter which is based on B+ tree of order d. Since Bloom filters can make a tradeoff between space and time, proposing a new hierarchical Bloom filter causes a remarkable reduction in space and time complexity of recommender systems. To increase the accuracy of the recommender systems we use Probabilistic version of hierarchical Bloom filter. By measuring the accuracy of the algorithm we show that the proposed algorithms not only decrease the time complexity but also have no significant effect on accuracy.

BACKGROUND: The present study was conducted with the aim to evaluate the performance of the applied science centers of the Iranian Red Crescent Society (IRCS) in crisis management. METHODS: In this descriptive-survey study, 167 out of 295 managers and experts of the applied science centers of the IRCS were selected on the basis of the Cochran formula. To examine the study variables, a questionnaire including 37 items and 2 parts evaluating performance and crisis management was employed. The financial, customer, internal processes, and growth and learning performances were measured in the performance assessment section, and the 6 dimensions of flexibility, inclusion, trust, risk perception, fairness, and consistency were measured in the crisis management part. The reliability, content validity, and construct validity of the questionnaires were confirmed by Cronbach’s alpha coefficient, a group of university professo BACKGROUND: The present study was conducted with the aim to evaluate the performance of the applied science centers of the Iranian Red Crescent Society (IRCS) in crisis management. METHODS: In this descriptive-survey study, 167 out of 295 managers and experts of the applied science centers of the IRCS were selected on the basis of the Cochran formula. To examine the study variables, a questionnaire including 37 items and 2 parts evaluating performance and crisis management was employed. The financial, customer, internal processes, and growth and learning performances were measured in the performance assessment section, and the 6 dimensions of flexibility, inclusion, trust, risk perception, fairness, and consistency were measured in the crisis management part. The reliability, content validity, and construct validity of the questionnaires were confirmed by Cronbach’s alpha coefficient, a group of university professors, and confirmatory factor analysis (CFA), respectively. Then, inferential statistical methods such as the Kolmogorov-Smirnov (K-S) test were used to ensure the normal distribution of data, and the structural equation model, Pearson correlation test, chi-square test, two-sample t-test, and one-sample t-test were used in the LISREL and SPSS software to test the hypotheses. RESULTS: The performance of the applied science centers of the IRCS in crisis management was higher than the average level based on the balanced scorecard (BSC) model. In addition, in terms of the 4 characteristics of financial performance, customer performance, internal process performance, and growth and learning performance, the crisis management performance of this organization was at a desirable level. CONCLUSION: It seems that policymakers, while maintaining the current situation, should plan for the development of crisis management, as well as for providing the ground for continuous improvement and better performance in this area. rs, and confirmatory factor analysis (CFA), respectively. Then, inferential statistical methods such as the Kolmogorov-Smirnov (K-S) test were used to ensure the normal distribution of data, and the structural equation model, Pearson correlation test, chi-square test, two-sample t-test, and one-sample t-test were used in the LISREL and SPSS software to test the hypotheses. RESULTS: The performance of the applied science centers of the IRCS in crisis management was higher than the average level based on the balanced scorecard (BSC) model. In addition, in terms of the 4 characteristics of financial performance, customer performance, internal process performance, and growth and learning performance, the crisis management performance of this organization was at a desirable level. CONCLUSION: It seems that policymakers, while maintaining the current situation, should plan for the development of crisis management, as well as for providing the ground for continuous improvement and better performance in this area.

Introduction: Because of the vulnerability of human settlements to natural disasters and damage caused by them, the study of the resilience of settlements has become critical in planning urban areas. The purpose of this paper is to evaluate resiliency of Baghershahr, a town with a population of 65000, locates in 4 km from Tehran city, against earthquake. Methods: The research data were collected by survey method (questionnaire tool) and also by using statistical documents and documentary reports. AHP technique has been used to determine the coefficient of importance of indicators and descriptive statistics methods have been used in data analysis. Findings: The study area has, on average, only 36.6% of the ideal conditions of resiliency. The figure in institutional dimension was 25.5%, indicating that this dimension has lowest resilience compared with other dimensions. After this, the physical dimension has a figure of 31.7%. In case of economic dimension, the figure was 40.5% of the ideal rate of resiliency and the highest level belongs to the social dimension, which was 45.4%. Conclusion: The studied area is an example of Iranian settlements with very low resiliency. On one hand, low level of the resiliency of Baghershahr is due to the threats caused from its vicinity to the oil and gas refinery complex, the thermal power plant, the sulfur industry, and the numerous plastic recycling workshops, the huge stores of petroleum products, gas and crude oil and crude oil pipelines. On the other hand, it is due to sudden formation and uncontrolled rapid growth of the town which has been accompanied by widespread migration of low-income classes over the past few decades.