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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Future of Medical Education Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Modern Education,Pediatric Interns,Short message service,Cell phone
- چکیده:
- چکیده انگلیسی: Background: Nowadays, due to the emergence of new and advanced technologies, methods of medical education have undergone several changes. Because students often spend many minutes per day using mobile phone and its features, and this is a great attraction for them. This study was an attempt to assess the capabilities of the mobile phone technology to be used for teaching the key points of pediatrics.
Methods: this study is a survey research. The population of this study includes medical students in the 93-92 school year who were selected in three different course of pediatrics. Available samples were selected from extern students (n = 85) and interns of pediatrics department (n=37). In this study multiple-choice questions were designed according to selected topics of courses which were taught during the period of externship and internship. Every day for 30 days one question was send via short message service (SMS) to students of pediatrics department. Students read the question and sent back the correct answers by text message as soon as possible. At the end of the course, also a researcher-designed questionnaire was used to assess the students' attitudes toward the usefulness of this method.
To assess the validity of the questionnaire, content validity was used and the reliability was assessed with Cronbach alpha coefficient of 0.80. Data were analyzed using SPSS16. Data analysis was performed in two levels of descriptive statistics (mean and standard deviation (SD)) and inferential statistics (One-Sample and independent t-test).
Results: Mean (± SD) score of the questionnaire for extern students and interns were 4.44±0.56 and 4.45± 0.59 respectively, and given that these means were significantly higher than 3 (cut-off point), this shows a desirability of the project of sending short messages from the perspective of medical students of pediatrics department. The difference between the average scores of extern students and interns in level of α=0.5 was not statistically significant (p= 0.92, t=0.08).
Conclusions: This study showed that the usage of short message service in the educational system has a positive effect on medical students learning, furthermore, students and interns believed that continuing this educational program has a good efficiency for their future career.- انتشار مقاله: 28-06-1393
- نویسندگان: Anush Azarfar,Rahim Vakili,Yalda Ravanshad,Mahdi Rabiee,Sakineh Mohebi Amin,Samaneh Kouzegaran
- مشاهده
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Interaction,Photovoltaic,Dye-sensitized solar cells,Redox mediator,Cobalt complexes
- چکیده:
- چکیده انگلیسی: The effects of changing ligand structures of cobalt complexes as electrolytes on the performance of the dye-sensitized solar cell were investigated. In this paper, cobalt(II/III) tris(2,2′-bipyridine), cobalt(II/III) tris(4,4′-dimethyl-2,2′-bipyridine) and cobalt(II/III) tris(4,4´-dimethoxy-2,2′-bipyridine) complexes as electrolytes in conjugate with organic dye D149 were investigated to consider the correlation of the cobalt complexes structural on the efficiency of the dye-sensitized solar cell. The Voc values of the prepared cells are related to the redox potential of their complexes and the maximum Voc was observed with cobalt(II/III) tris(2,2′-bipyridine) electrolyte. The obtained results represented that the cobalt(II/III) tris(4,4´-dimethyl- 2,2′-bipyridine) electrolyte has the highest efficiency in the solar cell compared with other cobalt complexes. These observed results have been interpreted by a possible interaction between the dye and cobalt complexes, which is more pronounced in the cobalt(II/III) tris(4,4´-dimethoxy- 2,2′-bipyridine) cell. This interaction should be fine-tuning with the structure of dye and complex to increase the efficiency of the dye-sensitized solar cell. In addition, the results demonstrated that a thinner layer of the TiO2 film decrease both the effects of mass transport issues and the charge recombination, therefore, it has significant advantages for cobalt electrolyte.
- انتشار مقاله: 20-11-1398
- نویسندگان: Zahra Parsa,Pooya Tahay,Navid Rabiee,Nasser Safari
- مشاهده
- جایگاه : پژوهشی
- مجله: Women’s Health Bulletin
- نوع مقاله: Journal Article
- کلمات کلیدی: libido,Menopause,Premenopause,Moods
- چکیده:
- چکیده انگلیسی: Background: One of the most common problems of women especially during transient menopause and post menopause is reduction in sexual desire which affects their social and psychological health. Objectives: The present study attempted to evaluate the impact of some personal and social factors, common age-related complaints, and follicular stimulating hormone and estradiol on sexual desire. Patients and Methods: This cross-sectional study was conducted on 201 females, aged 45-60 years old, without any history of psychological illness, and not receiving any hormone therapy including estrogen-progesterone. They filled three questionnaires; menopausal rating scale (MRS), symptom checklist 90 and their sexual interests and demographic characteristics. The data were analyzed using Pearson Chi-square tests and logistic regression (using SPSS 18). Results: A deceasing sexual desire was observed in 34.7% of the cases. A statistically significant relationship was found between reduced sexual desire and physical complaints and mood changes including anxiety and depression. Women who were widowed or divorced exhibited a significantly higher reduction in sexual desire. There was a significant correlation between sexual satisfaction and sexual desire. However, no significant relationship was observed between sexual desire and hot flashes, dyspareunia and level of estradiol and FSH. Conclusions: Mental and physical health of women and their sexual satisfaction play a more effective role in predicting sexual desire, regardless of age and hormonal changes during this period.
- انتشار مقاله: 11-10-1348
- نویسندگان: Maryam Rabiee,Malihah Nasirie,Nafisah Zafarqandie
- مشاهده
- جایگاه : پژوهشی
- مجله: Teaching English Language
- نوع مقاله: Journal Article
- کلمات کلیدی: feedback,writing skill,Oral-feedback,Teacher- feedback,Written-feedback
- چکیده: بازخورد
- چکیده انگلیسی: For the past several decades, research on L1 and L2 composition has emphasized the importance of the role of composition teachers in providing feedback on students' writings. This article reports on the use of providing different modes of feedback-written/oral-by the teacher and their impacts on Iranian EFL students' writing performances. Sixty Iranian university students-10 males and 50 females, aged between 22 and 25 majoring in English Translation-were assigned to three homogeneous groups based on their scores on the Oxford Placement Test (OPT) and a sample paragraph on a given topic, emphasizing the expository genre by providing some reasons. They covered five topics in a sequence of ten written texts-before and after receiving feedback-over a 15-week period. Then, the researchers scored the papers analytically. The results revealed that: first; feedback had a significant effect on students' revising their first drafts and second, the students benefited from the two types of teacher-provided feedbacks almost equally. The findings also confirmed student- teacher conferences as an effective means of providing comments on students' writings, which in turn, could be employed to improve interaction and socialization among students and contribute to enhanced attitudes towards learning and working with others especially in EFL settings.
- انتشار مقاله: 21-09-1385
- نویسندگان: Parviz Maftoon,Mitra Rabiee
- مشاهده
- جایگاه : پژوهشی
- مجله: Physical Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: fatty acids,aluminum,Contact angle,Surface coating,Superhydrophobic surface
- چکیده:
- چکیده انگلیسی: A superhydrophobic aluminum surface was fabricated through an enhanced low-cost approach and the effects of several relevant factors on static contact angle and sliding angle were investigated. First, the operating parameters including the etching time as well as the reaction time and temperature were varied. Next, the so-called chemical factors including three different fatty acids and five different solvents were examined. The surface was analyzed by means of SEM, ATR-FTIR, EDX, and WCA measurements. The results show that the immersion time of about 5 min and the reaction temperature of about 60 °C were the optimum conditions for the creation of a superhydrophobic Al surface with excellent self-cleaning properties. Overall, the choice of oleic acid and ethanol were found to be the best as the fatty acid and solvent, respectively. The highest contact angle was 163.7° and the lowest sliding angle was about 1°.
- انتشار مقاله: 02-08-1395
- نویسندگان: Mehrdad Fallahah,Ahmad Rabiee,Mohammad Ghashghaee,Amir Ershad-Langroudi
- مشاهده
- جایگاه : پژوهشی
- مجله: AUT Journal of Mechanical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Dryout,Critical Heat Flux,Alumina nanoparticle
- چکیده:
- چکیده انگلیسی: Critical heat flux has been recognized as the upper limit for the safe operation of many cooling systems which may lead to the occurrence of dryout causing a large temperature gradient in the heated wall. One way to increase the amount of the critical heat flux is to put in nanoparticles such as Al2O3 to the base fluid. The current research investigates the nanoparticles effect on dryout phenomenon using computational fluid dynamics. Boiling phenomena are simulated using the mechanistic model organized in Rensselaer Polytechnic Institute which is extended to analyze the critical heat flux by partitioning wall heat flux to liquid and vapor phases. It was shown that the dryout phenomenon can be delayed by increasing the nanoparticles concentration, and in certain concentration of nanoparticles (5 percent), dryout would not take place.
- انتشار مقاله: 29-04-1396
- نویسندگان: A. Rabiee,A. Atf
- مشاهده
- جایگاه : پژوهشی
- مجله: AUT Journal of Mechanical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Boiling,Critical Heat Flux,Mixing vane,Spacer grid
- چکیده:
- چکیده انگلیسی: The necessity and importance of a high heat removal potential in various areas particularly
in nuclear applications are in a direct relationship with the excessively applied heat flux level. One way
to increase the heat transfer performance and subsequently enhance the threshold of the critical heat
flux is to employ spacer grids accompanied by mixing vanes. In this study, the effect of the spacers
with mixing vanes on the critical heat flux characteristics in the dryout condition has been numerically
investigated employing the benefits of the Eulerian-Eulerian framework. In the current research, several
vane angles, including vane with 0, 15 and 25 degrees in comparison with the effect of the bare spacer
without any mixing vanes on the flow characteristics were examined. It was shown that the existence of
the spacer alone, delays the temperature jump under critical heat flux conditions. It was also concluded
that increasing the angle of the mixing vanes, further improves the heat transfer performance of the
system by postponing the sudden temperature jump occurring in the channel; however, the presence of
the spacers and vanes in the flow field imposes an increase of the pressure drop due to the constriction
on the coolant flow area.- انتشار مقاله: 03-03-1396
- نویسندگان: A. Rabiee,L. Moradi,A. Atf
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of System Management
- نوع مقاله: Journal Article
- کلمات کلیدی: Job satisfaction,Brand Identity,Organizational Confidence,Brand Performance
- چکیده:
- چکیده انگلیسی: The purpose of this study was to do an empirical study on the service sector to investigate the effect of brand identity on brand performance and employees’ job satisfaction with the intermediating role of organizational confidence, using Buil et al. (2015) model. In this model, the effect of brand identity on brand performance and employees’ job satisfaction is investigated both directly and indirectly through the organizational confidence. A sample of 273 individuals was selected randomly from employees of Pasargad bank branches in Tehran. The data collection instrument was a standard questionnaire with 26 questions whose validity and reliability were confirmed; it was distributed among the statistical population. Data were analyzed using descriptive statistics and inferential statistics. At the level of descriptive statistics, indices such as frequency and frequency percentage were used. The correlation methods, structural equation modeling, and path analysis were used on the level of inferential statistics; LISREL and SPSS software were used for this purpose. The results of the analysis showed the direct and positive impact of brand identity on brand performance, organizational confidence, and job satisfaction. In general, the ability of Pasargad Bank to improve the brand performance, increase the organizational confidence and satisfy its employees, is directly and indirectly related to the brand identity (p <0.05).
- انتشار مقاله: 03-02-1398
- نویسندگان: Mohammad-Reza Rabiee Mandejin,Mohammad-Reza Rabiee Mandejin,Mohammad-Reza Rabiee Mandejin
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Ultrafine Grained and Nanostructured Materials
- نوع مقاله: Journal Article
- کلمات کلیدی: mechanical alloying,Nanomaterials,Crystallite Refinement,Process Control Agent
- چکیده:
- چکیده انگلیسی: Nanostructured Cu-20Fe alloy was synthesized by mechanical alloying process and the effects of process control agents (PCA) on the phase formation, crystallite refinement and morphology of powder particles were studied. The dissolution of Fe into Cu matrix and the morphology of powder particles were analyzed by X-ray diffraction (XRD) technique and scanning electron microscopy (SEM), respectively. The mean crystallite size was approximated by the method developed by Williamson and Hall. It was found that in the absence of PCA (Toluene in the present work), the iron peaks vanish after 5 h of mechanical alloying process and the mean crystallite size of the matrix decreases to 35 nm and large agglomerated particles are formed during milling. In this regard, it was found that the addition of PCA decreases the rate of crystallite refinement and formation of solid solution but does not affect the final mean crystallite size. It was also found that the addition of PCA during milling decreases the powder particle size considerably and by preventing agglomeration can lead to a finer powder particle size compared with the initial unmilled powders. It was also revealed that the effect of PCA on particle size is much greater than the effect of milling time.
- انتشار مقاله: 27-12-1394
- نویسندگان: Mina Rabiee,Hamed Mirzadeh,Abolghasem Ataie
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Ultrafine Grained and Nanostructured Materials
- نوع مقاله: Journal Article
- کلمات کلیدی: mechanical alloying,Hydrogen desorption,magnesium hydride,Nanocrystalline composite
- چکیده:
- چکیده انگلیسی: Storage of hydrogen is one of the key challenges in developing hydrogen economy. Magnesium hydride (MgH2) is an attractive candidate for solid-state hydrogen storage for on-board applications. In this study,
10 wt.% ZrB2 was co-milled with magnesium hydride at different milling times to produce nanocrystalline composite powder. The effect of milling time and additive on the hydrogen desorption properties of obtained powder was evaluated by thermal analyzer method and compared with pure MgH2. The phase constituents of powder particles were characterized by X-ray diffractometry method. The grain size and lattice strain of β-MgH2 phase were estimated from the broadening of XRD peaks using Williamson–Hall method. The size and morphological changes of powder particles upon mechanical alloying were studied by scanning electron microscopy. XRD analysis showed that the mechanically activated magnesium hydride consisted of β-MgH2, γ-MgH2 and small amount of MgO. It is shown that the addition of ZrB2 to magnesium hydride yields a finer particle size. The thermal analyses results showed that the addition of ZrB2 particle to magnesium hydride and mechanical alloying for 30 h reduced the dehydrogenation temperature of magnesium hydride from 319 °C to 308 °C. This can be attributed to the particle size reduction of magnesium hydride.- انتشار مقاله: 24-10-1392
- نویسندگان: Mona Maddah,Mohammad Rajabi,Seyed Mahmood Rabiee
- مشاهده