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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Interdisciplinary Journal of Virtual Learning in Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: needs assessment,E-Learning,competency,Distance education,Instructors,Faculty
- چکیده:
- چکیده انگلیسی: Introduction: This paper aims to describe the required competencies for faculties in electronic and virtual learning at the universities of Iran according to the students, faculties, administrators and planners’ viewpoints.Materials and Methods: This research is applied and developmental and is conducted by the quantitative and qualitative method in Iran during 2010 to 2013. Samples of this stage of the research were 325 students based on a sample size of Krejcie and Morgan formula, who were available from random samples and 20 Specialist that have been chosen for targeted. Three questionnaires with closed-ended questions with four-point Likert scale were used in order to collect the students' viewpoint and semi-structured interview to collect the faculties, administrators and planners’ viewpoints. Validity of content, based on the comments of the experts, and the reliability of the questionnaires is calculated using the Cronbach alpha coefficient and Wilcoxons’ test is used for comparing the current and desired status of distance education faculties' required competencies.Results: The mean of survey on the students in both current and desired status indicates that there is a significant difference between two questioned statuses in every 19 listed TPCK competencies, so that the mean scores of current status is much less than the desired status and the students' expectations are not met. Specialist also confirmed these competencies for desired status, and added some competencies to complete them.Conclusion: Universities in developing e-learning and virtual courses need to prepare paraprofessional faculties with competencies of integrating technological, pedagogical and content knowledge that have listed in this research, to be valid According to internal and external observers, especially students.
- انتشار مقاله: 11-10-1398
- نویسندگان: Mitra Daneshvar,Mahmood Mehrmohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of System Management
- نوع مقاله: Journal Article
- کلمات کلیدی: Iranian Scale,Iranian Traits,Consumer Brands
- چکیده:
- چکیده انگلیسی: Nowadays, marketing professionals are increasingly aware of the importance of brands in the success of organizations, as it can be an asset with utmost importance for a lasting competitive advantage. Indeed, what is called a brand is something far more than a name. The brand and its affiliates pave the way for human communication. Brand personification is done in this respect. Although BP can be defined separately from human personality, it is not entirely independent of it. Therefore, in this study, the indicators of the component themes of consumer BP present in Iran’s market are clearly demonstrated.
The present study, which falls into the category of developmental research in terms of objective, is carried out qualitatively. As a developmental research, this study uses a sample of 29 students of management whom were selected by non-probability sampling (purposive and judgemental). The main research tool was an open-ended questionnaire, completed and collected by semi-structured interviews.
The findings consist of 74 indicators that were extracted and compiled from the literature review, theoretical foundations, research background (such as Aaker, 1997 and Geuns et al. 2008) and semi-structured interviews using NVivo software, which could be divided into eight positive and negative dimensions. Furthermore, some of the 74 indicators or personality traits identified for Iranian consumer brands include beautiful, personable, hardworking, always friendly, strong and capable, skilled, attractive, creative, efficient, competent, competitive, friendly to little ones, old friend, funny, dysfunctional, uncommitted, insincere, unfriendly (unkind), bully, tyrant, naughty, narcissistic that actually constitutes the personality themes of consumer brands in Iran’s commodity market.- انتشار مقاله: 26-10-1397
- نویسندگان: Mahmood Mohammadian,Aliakbar Afjeh,Maghsoud Amiri,Mehrzad Kari
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Information Technology Management
- نوع مقاله: Journal Article
- کلمات کلیدی: brand equity,Customer's Services,Internet Company,Marketing Communication
- چکیده:
- چکیده انگلیسی: Lack of appropriate strategies to enhance brand equity of Internet companies needs particular attention in Iran. The aim of this research is to study factors influencing on the brand equity of internet companies. The study is descriptive-survey type. At first, different factors influencing on brand equity were defined. Then the hypothesis was examined via regression analysis (Partial Least Squares Modeling). After that the results were analyzed and discussed. The statistical population was the students of Allameh Tabataba’i University who have had at least one experience of internet shopping. To collect the primary data, questionnaires were distributed and the population was selected using available stratified sampling method; both paper and online questionnaire were used .After collecting acceptable questionnaires, the statistical methods such as Partial Least Squares analysis and Friedman test were used. The finding shows that among factors influencing on brand equity, marketing communication and customer's services had priority. Other factors which affect the brand equity were brand awareness, perceived quality of brand and interactivity.
- انتشار مقاله: 11-10-1348
- نویسندگان: Mahmood Mohammadian,Zohreh Dehdashti,Arash Jalalzadeh Moghaddam Shahri
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Education Experiences
- نوع مقاله: Journal Article
- کلمات کلیدی: Curriculum,Higher Education,pattern,intercultural
- چکیده:
- چکیده انگلیسی: The purpose of this study was to design the curriculum pattern for the higher education of Iran using an intercultural approach with qualitative design and the Grounded Theory (GT) method. To study the characteristics of the curriculum with an intercultural approach, after conducting structured interview with 6 experts in the field of curriculum studies and higher education management, the main categories as well as subcategories of the process were extracted during the coding procedure, and as the research results revealed, the categories identified in the paradigm model with axial phenomenon included requirements (2 dimensions, 1 spectrum), objectives (2 dimensions, 1 spectrum), content attributes (2 dimensions, 2 spectrum), teaching – learning methods (1 dimension, 1 spectrum), teacher’s characteristics (2 dimension, 2 spectrums), assessment (1 dimension, 1 spectrum), causal conditions (dimensions of internal and external factors in the effective–neutral spectrum), contextual conditions (extra-organizational, intra organizational and trans organizational dimensions in broad–limited spectrum), intermediary conditions (dimensions of internal and external factors in the effective – neutral spectrum), strategies (dimension of intercultural paradigm in the stable–unstable spectrum) and consequences (comprehensive development dimension in the advanced–non advanced spectrum) which displayed the components of curriculum pattern in the higher education of Iran using an intercultural approach. In the end, the final model was presented to validate the GT through focus group method.
- انتشار مقاله: 19-11-1398
- نویسندگان: Zahra Shahbazi,Mehdi Kalantari,Alireza Sadeghi,Mahmood Mehrmohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Arsenate,Nanocomposite,Membrane,Drinking Water
- چکیده:
- چکیده انگلیسی: Terms and conditions of current drinking water quality standards, including reducing the maximum arsenic concentration from 50 μgl-1 to 10 μgl-1 and predicted stricter standards in future, reveals the necessity for development of new technologies. This study aimed to prepare and evaluate a new nanocomposite membrane using graphene oxide (GO) thin layer to remove arsenic (v) from water. To fabricate the membrane, initially GO was prepared using the modified Hummers' method and then to gain a narrow-dispersed GO dispersion, several times centrifugation and sonication were performed. Then resultant dispersed GO was coated on a microporous flat-sheet polyethersulfone support by coating/deposition and vacuum filtration process. Performance of the synthesized membrane was assessed using a dead end filtration system. The results showed that pure water flux decreased as the coated GO thickness increased. Among the three prepared membranes, the greatest flux was attributed to M1 membrane with the value of 398.5 lm-2h-1 and the minimum flux was for M3 with a value of 131.3 lm-2h-1 at 4 bar of pressure. Furthermore, by increasing the coated GO, rejection of arsenate ions increased significantly. With initial concentration of 1000 ± 20 μgl-1, percentage of arsenate rejection for M1, M2 and M3 membranes were 41.8%, 73.5% and 86.7%, respectively. Relatively high removal by this novel membrane can be due to the exceptional properties of GO nanostructure and the presence of hydrophilic functional groups.
- انتشار مقاله: 03-12-1394
- نویسندگان: Reza Rezaee,Simin Nasseri,Amir Hossein Mahvi,Ali Jafari,Mahdi Safari,Behzad Shahmoradi,Mahmood Alimohammadi,Mohammad Khazaei,Mohammad Maroosi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Disinfection,Drinking Water,Coliform,Radio Waves
- چکیده:
- چکیده انگلیسی: The most common used methods for water disinfection were chemicals like chlorine, ozonation, ultraviolet radiation, membrane processes, etc. Water disinfection using irradiation techniques is new in water treatment industry which has been developed recently. The aim of the present study was to investigate radio frequency (RF) efficiency for the inactivation of total coliform (TC), fecal coliform, and heterotrophic bacterial count of water pellets. Tap water samples were taken from School of Public Health, Tehran University of Medical Sciences and irradiated using hydropad device, steam KLEAR model S-38 (1.2 W and frequency of 120-200 kHz). Microbial concentration was measured in cycles 1, 5, 10, 15, 20, 25, 30, 35, and 40 in 1 and 2 h contact time. Indicator bacteria were counted using plate count method and multiple fermentation tube technique. According to the microbial results, after 40 cycles and without chlorine residual, TC, fecal coliform, and heterotrophic bacteria were reduced by 86, 90, and 85%, while after 15 cycles and 0.8 mg/L chlorine residual, removal rate was 89, 91, and 89%, respectively. Furthermore, it was observed that after 2 h of contact time, TCs, fecal coliforms, and heterotrophic plate count were reduced by 78.2, 80, and 60%, respectively. Although RF efficiency in water disinfection has not been studied, our findings suggested its possible use due to more than 75% efficiency. From the standpoint of practical use, more studies should be done, especially to find a fine synergist agent, determining power, frequency, and suitable contact time and also the method should be modified.
- انتشار مقاله: 08-06-1393
- نویسندگان: Sommayeh Saadi,Mahmood Alimohammadi,Ramin Nabizadeh,Alireza Mesdaghinia,Hassan Aslani,Shahrokh Nazmara,Maryam Ghani,Babak Mahmoodi,Masoomeh Asgari,Nejat Mousavipour
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Iron,aluminum,Electrocoagulation,Natural Organic Matter,Bipolar and Monopolar
- چکیده:
- چکیده انگلیسی: Natural organic matter (NOM) affects some qualitative parameters of water such as color. In addition, it can deteriorate the performance of water treatment process including coagulation, adsorption, and membranes. NOM also reacts with chlorine in the chlorination process and may form disinfection by-products. The present study was carried out in laboratory-scale in a batch system using a cylinder shape reactor with effective volume of 2 l. The initial NOM concentrations during the study period were 10, 25, and 50 mg/l. After specific time intervals, samples were taken from the reactor and filtered. Finally, the NOM removal according to total organic carbon (TOC) content of the samples that were analyzed with a TOC analyzer. The results showed that the highest NOM removal efficiency for three initial concentrations 10, 25, and 50 mg/l were 91, 94, and 82%, respectively. These removal efficiencies were obtained at pH 7, contact time of 20 min, and electrical current of 0.1 A. The electrical energy consumption was 0.08, 0.06, and 0.03 kWh/m3, respectively. In this study, the application of electrocoagulation (EC) treatment method using combined Al and Fe electrode was examined to remove NOM from aqueous solution. Based on the obtained results, the EC can be used as an effective method for removing NOM from aqueous solution.
- انتشار مقاله: 09-03-1393
- نویسندگان: Masoomeh Askari,Mahmood Alimohammadi,Mohammad Hadi Dehghani,Mohammad Mahdi Emamjomeh,Shahrokh Nazmara
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: heavy metals,Vegetables,Daily Intake
- چکیده:
- چکیده انگلیسی: Concentration and daily intake (DI) of heavy metals [lead (Pb), chromium (Cr), cadmium (Cd) and copper (Cu)] were investigated in four common edible vegetables including coriander, dill, radish root and radish leaf grown at peri-urban sites in Sanandaj, Iran. A total of 120 composite samples of vegetables were taken from ten vegetable farms during six months from May to October 2012. Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used to estimate the levels of heavy metals. The results showed that Pb and Cr concentrations exceeded the safety limits given by Food and Agriculture Organization (FAO) or the World Health Organization (WHO) for human consumption with the exception of copper and cadmium that were lower than the permissible leveling in all of the samples. Furthermore, the results showed that there was a significant variation in the levels of these metals among the examined vegetables (P < 0.001). DI values for Pb, Cu, Cr and Cd could be 0.1, 1.5, 0.94 and 0.004 mg per day, respectively. As respect, DI values for Pb and Cd were also below the international guideline bases. Although Pb level was higher than the permissible standard, it seems that daily intake of these vegetables may not have detrimental health hazards to consumers.
- انتشار مقاله: 13-05-1392
- نویسندگان: Afshin Maleki,Fardin Gharibi,Mahmood Alimohammadi,Hiua Daraei,Yahya Zandsalimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Arsenate,Nanocomposite,Membrane,Drinking Water
- چکیده:
- چکیده انگلیسی: Terms and conditions of current drinking water quality standards, including reducing the maximum arsenic concentration from 50 μgl-1 to 10 μgl-1 and predicted stricter standards in future, reveals the necessity for development of new technologies. This study aimed to prepare and evaluate a new nanocomposite membrane using graphene oxide (GO) thin layer to remove arsenic (v) from water. To fabricate the membrane, initially GO was prepared using the modified Hummers' method and then to gain a narrow-dispersed GO dispersion, several times centrifugation and sonication were performed. Then resultant dispersed GO was coated on a microporous flat-sheet polyethersulfone support by coating/deposition and vacuum filtration process. Performance of the synthesized membrane was assessed using a dead end filtration system. The results showed that pure water flux decreased as the coated GO thickness increased. Among the three prepared membranes, the greatest flux was attributed to M1 membrane with the value of 398.5 lm-2h-1 and the minimum flux was for M3 with a value of 131.3 lm-2h-1 at 4 bar of pressure. Furthermore, by increasing the coated GO, rejection of arsenate ions increased significantly. With initial concentration of 1000 ± 20 μgl-1, percentage of arsenate rejection for M1, M2 and M3 membranes were 41.8%, 73.5% and 86.7%, respectively. Relatively high removal by this novel membrane can be due to the exceptional properties of GO nanostructure and the presence of hydrophilic functional groups.
- انتشار مقاله: 03-12-1394
- نویسندگان: Reza Rezaee,Simin Nasseri,Amir Hossein Mahvi,Ali Jafari,Mahdi Safari,Behzad Shahmoradi,Mahmood Alimohammadi,Mohammad Khazaei,Mohammad Maroosi
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Mathematical Finance and Application
- نوع مقاله: Journal Article
- کلمات کلیدی: Data mining,Genetic Algorithm,financial reporting fraud,fraud detection
- چکیده:
- چکیده انگلیسی: both academic and auditing firms have been searching for ways to detect corporate fraud. The main objective of this study was to present a model to detect financial reporting fraud by companies listed on Tehran Stock Exchange (TSE) using genetic algorithm. For this purpose, consistent with theoretical foundations, 21 variables were selected to predict fraud in financial reporting that finally, using statistical tests, 9 variables including SALE/EMP, RECT/SALE, LT/CEQ, INVT/SALE, SALE/TA, NI/CEQ, NI/SALE, LT/XINT, and AT/LT were selected as the potential financial reporting fraud indexes. Then, using genetic algorithm, the final model of fraud detection in financial reporting was presented. The statistical population of this study included 66 companies including 33 fraudulent and 33 non-fraudulent companies from 2011 to 2016. The results showed that the presented model with the accuracy of 91.5% can detect fraudulent companies. These findings extend financial statement fraud research and can be used by practitioners and regulators to improve fraud risk models.
- انتشار مقاله: 11-04-1398
- نویسندگان: Mahmood Mohammadi,Shohreh Yazdani,Mohammadhamed Khanmohammadi
- مشاهده