Allame Tabatabaee University

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Tehran, Iran
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Rashidi H.,Allame Tabatabaee University
Journal of Simulation | Year: 2017

In studying by simulation, choosing an appropriate software would be a difficult task because many are available. On the other hand, few researches focus on classification of simulation tools/languages and their comparison. This paper makes a survey on taxonomies of discrete simulation software and then presents six taxonomies for them. The first taxonomy is in different approaches for worldviews, which includes event scheduling, activity scanning, three-phase and process interaction. The second one is based on how the software handles entities and the third one is to have simulation software with (without) some programming capabilities. The fourth taxonomy is based on how discrete simulation software AIDS in the construction of user's applications. The fifth taxonomy is related to executing the model and sixth one is concerned with the level of autonomy used in elements of simulation models. Afterwards, more than 60 simulation software are evaluated in the taxonomies provided. Finally the major challenges for next generation simulation packages are presented, based on the observations derived from the evaluation. © 2016 The Operational Research Society.


Khalili-Damghani K.,Islamic Azad University at Tehran | Amiri M.,Allame Tabatabaee University
Reliability Engineering and System Safety | Year: 2012

In this paper, a procedure based on efficient epsilon-constraint method and data envelopment analysis (DEA) is proposed for solving binary-state multi-objective reliability redundancy allocation series-parallel problem (MORAP). In first module, a set of qualified non-dominated solutions on Pareto front of binary-state MORAP is generated using an efficient epsilon-constraint method. In order to test the quality of generated non-dominated solutions in this module, a multi-start partial bound enumeration algorithm is also proposed for MORAP. The performance of both procedures is compared using different metrics on well-known benchmark instance. The statistical analysis represents that not only the proposed efficient epsilon-constraint method outperform the multi-start partial bound enumeration algorithm but also it improves the founded upper bound of benchmark instance. Then, in second module, a DEA model is supplied to prune the generated non-dominated solutions of efficient epsilon-constraint method. This helps reduction of non-dominated solutions in a systematic manner and eases the decision making process for practical implementations. © 2012 Elsevier Ltd. All rights reserved.


Moalagh M.,Shahid Beheshti University | Ravasan A.Z.,Allame Tabatabaee University
International Journal of Production Research | Year: 2013

Implementing an enterprise resource planning system is a sophisticated, lengthy, and costly process which tends to face serious failure. Thus, it is essential to perform a success assessment at the post-implementation stage of an ERP project to evaluate how much the system has succeeded in achieving its predetermined objectives. This paper proposes a practical framework for assessing a firm's ERP post-implementation success utilising current models through a fuzzy analytic network process. The construct of ERP success is broken down into three main parts, including managerial success, organisational success, and individual success. Using this framework, the firm's ERP system success can be determined and the required improvement projects can be proposed to promote the success level. The proposed framework has been applied to a real international company, in the field of manufacturing and supplying turbines, to measure the firm's ERP postimplementation success. Finally, the advantages of the model are illustrated. © 2013 Taylor & Francis.


Hanafizadeh P.,Allame Tabatabaee University | Mirzazadeh M.,Allame Tabatabaee University
Expert Systems with Applications | Year: 2011

A common problem for marketing strategists is how to appropriately segment the market and select segment-specific marketing strategies. This paper presents a novel approach which integrates Fuzzy Delphi method, self-organizing maps (SOM) and a visualization technique to cluster customers according to their various characteristic variables and visualize segments by producing colorful market maps. These market maps not only help the managers to see fully visualized clusters of market but also reveal mutual non-linear correlations between different customers' characteristic variables. In this research we studied ADSL service market of an Iranian Telecommunication Company. SOM algorithm and visualizing technique were implemented in MATLAB environment to produce market maps of data set. © 2010 Elsevier Ltd. All rights reserved.


Mohammadi H.,Allame Tabatabaee University
Computers in Human Behavior | Year: 2015

The purpose of this paper is to examine an integrated model of TAM and D&M to explore the effects of quality features, perceived ease of use, perceived usefulness on users' intentions and satisfaction, alongside the mediating effect of usability towards use of e-learning in Iran. Based on the e-learning user data collected through a survey, structural equations modeling (SEM) and path analysis were employed to test the research model. The results revealed that "intention" and "user satisfaction" both had positive effects on actual use of e-learning. "System quality" and "information quality" were found to be the primary factors driving users' intentions and satisfaction towards use of e-learning. At last, "perceived usefulness" mediated the relationship between ease of use and users' intentions. The sample consisted of e-learning users of four public universities in Iran. Past studies have seldom examined an integrated model in the context of e-learning in developing countries. Moreover, this paper tries to provide a literature review of recent published studies in the field of e-learning. © 2014 Elsevier Ltd. All rights reserved.


Aghababaei N.,Allame Tabatabaee University
Mental Health, Religion and Culture | Year: 2014

The relations among religiousness, subjective well-being (SWB) and the HEXACO (Honesty-Humility, Emotionality, eXtraversion, Agreeableness, Conscientiousness, Openness) model of personality were studied in a Muslim population. As expected, Extraversion and Honesty-Humility factors were the strongest correlates of SWB and religiosity, respectively. Religiosity also correlated with higher levels of SWB, and explained variance in SWB beyond personality factors, showing that religion is a unique predictor of well-being. Results have been discussed within the religious orientation paradigm, and the HEXACO model of personality structure. © 2014 © 2014 Taylor & Francis.


Mohammadi H.,Allame Tabatabaee University
Transforming Government: People, Process and Policy | Year: 2014

Purpose – The purpose of this paper is to explore barriers; the mediating role of usability; and the moderating effects of subjective norms, personal innovativeness, self-efficacy and perceived image on users’ attitudes toward loyalty to Internet banking (IB) in Iran. Design/methodology/approach – Based on the consumer data collected from a survey, structural equations modeling and path analysis were used to test the research model. Findings – The results revealed that “low perceived usefulness” and “low perceived ease of use” both had negative effects on users’ attitudes. “Low awareness” and “low system compatibility” were found to be the main factors impeding users’ attitudes toward loyalty to IB. “Perceived usefulness” showed no mediating role in the relationship between ease of use and users’ attitudes. At last, all concerned moderators moderated the relationships between ease of use/usefulness and users’ attitudes. Research limitation/implication – The sample was only composed of IB users of one Iranian bank, and non-users were not studied. Originality/value – Past studies have seldom examined the role of individual drivers such as personal innovativeness and self-efficacy and social drivers such as subjective norms and perceived image as moderating variables in the context of developing countries. © Emerald Group Publishing Limited.


Mohammadi H.,Allame Tabatabaee University
Computers in Human Behavior | Year: 2014

The purpose of this paper is to explore barriers, the mediating role of usability and the moderating effects of personal innovativeness and subjective norms on consumers' attitudes towards use of mobile banking in Iran. Based on the consumer data collected through a survey, structural equations modeling (SEM) and path analysis were employed to test the research model. The results revealed that "system compatibility" was found to be the main factor affecting users' attitudes towards use of mobile banking. "Resistance" showed a significant negative effect on both ease of use and usefulness. "Perceived usefulness" mediated the relationship between ease of use and users' attitudes. At last, both subjective norms and personal innovativeness moderated the relationships between usefulness and attitude. The sample was only composed of mobile banking users and non-users were not studied. Past studies have seldom examined the role of individual drivers like personal innovativeness and social drivers like subjective norms as moderating variables in the context of developing countries. © 2014 Elsevier Ltd. All rights reserved.


Mohammadi H.,Allame Tabatabaee University
Telematics and Informatics | Year: 2015

The purpose of this paper is to examine an integrated model of TAM and IS success model to explore the effects of quality features, perceived ease of use, perceived usefulness on users' intentions and satisfaction and their effects on e-learning outcomes such as actual use and perceived learning assistance, alongside the mediating effect of usability towards use of e-learning in Iran. Based on the e-learning user data collected through a survey, structural equations modeling (SEM) and path analysis were employed to test the research model. The results revealed that "intention" and "user satisfaction" both had positive effects on actual use of e-learning. "System quality" and "information quality" were found to be the primary factors driving users' intentions and satisfaction towards use of e-learning. E-learning outcomes such as actual use and perceived learning assistance were positively predicted by satisfaction and intention. At last, "perceived usefulness" mediated the relationship between ease of use and users' intentions. The sample consisted of e-learning users of four public universities in Iran. Past studies have seldom examined an integrated model in the context of e-learning in developing countries. Moreover, this paper tries to provide a literature review of recent published studies in the field of e-learning. © 2015 Elsevier Ltd. All rights reserved.


Aghababaei N.,Allame Tabatabaee University
Journal of Medical Ethics | Year: 2014

Objective: Altruism is arguably the quintessential moral trait, involving willingness to benefit others and unwillingness to harm them. In this study, I explored how altruism and other personality variables relate to acceptance of euthanasia. In addition, I investigated the role of culture in attitudes to subcategorical distinctions of euthanasia. Methods: 190 Iranian students completed the Attitude Towards Euthanasia scale, the HEXACO Personality Inventory-Revised, and an interest in religion measure. Results: Higher scores on altruism, Honesty-Humility, Agreeableness, Conscientiousness and religiousness were associated with viewing euthanasia as unacceptable. As expected, altruism explained unique variance in euthanasia attitude beyond gender, religiosity and broad personality factors. Conclusions: Cultural and individual differences should be taken into consideration in moral psychology research and end-of-life decision-making.

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