Showing 9 results for Mosayebi
Volume 2, Issue 4 (3-2013)
Abstract
Abstract
By emergence of competitive economics, the concepts such as customer orientation and customer satisfaction have become the fundamentals of businesses and any organization that is regardless of these aspects is eliminated from the marketplace. In addition to introducing the indicators of internal marketing, the purpose of this study is to investigate the relationship between internal marketing and customer orientation in Bank Melli Iran at branches of Mazandaran province as a financial-service enterprise. The under study population is comprised of the bank’s employees. The stratified sampling is used to select the sample of this study. Using Morgan sampling table and considering the number of regions and their employees, a sample size of 250 employees is determined. This amount includes a higher percentage to cope with the unreturned or incompleted questionnaires. Gathered data are analyzed using SPSS and Lisrel software and proposed relationships are examined. Research results indicate that the organization vision did not significantly affect the customer orientation, skill development programs affected the customer orientation significantly, and incentive and reward programs affected the customer orientation, either.
Keywords: Internal Marketing, Customer-orientation, Improvement and Development, Reward, Branches of Bank Melli Iran in Mazandaran.
Volume 6, Issue 3 (Fall 2022)
Abstract
Subject
In this study, the steam reforming of the methanol process was analyzed based on three different inputs including temperature, pressure, and H2O/CH3OH ratio with the use of different Artificial Intelligence methods.
Methodology
In the first step, Cu-Zn/ZrO2 catalysts were synthesized via the co-precipitation method, and then experimental tests of steam reforming of methanol were performed at a temperature range of 180 –500 °C, the pressure of 1-11 bar, and the H2O/CH3OH ratio of 0.75-3.75 on the Cu-Zn/ZrO2 catalyst in a fixed bed reactor. Afterward, three different methods of Mamdani fuzzy type-1, Mamdani fuzzy type-2, and Sugeno fuzzy were applied in order to develop the models. Using these methods, the developed models only required the heuristics derived from the expert’s knowledge and some experimental data, without needing the calculation of complex kinetic as well as thermodynamic parameters related to the corresponding process. In addition, the structures of the developed fuzzy models were optimized to improve the model performance according to the analysis of the initial results. The model developments didn’t require a high number of experimental data, and this feature is especially interesting when dealing with the process conditions in which data gathering is expensive or the accuracy of data is low.
The main results
The overall accuracy as well as the properties of the developed models were compared. The type-2 Mamdani fuzzy model proved to be the best model, using which, the methanol conversion, H2 yield, and CO yield were predicted with accuracies of 67%, 91%, and 83%, respectively.
Volume 9, Issue 1 (Winter 2021)
Abstract
Aims: Positive psychology is a new psychology branch that focuses on positive traits leading to freshness, greater concentration, and individuals' satisfaction. This study aimed to extract positivist psychology components and assess the effect of positivist content and theme on school education and improve teachers' and students' psychological capital.
Materials & Methods: In this hybrid (qualitative-quantitative) research, the first positivist components and themes were extracted from Seligman's point of view using open coding, axial coding, selective coding steps, and a network of positive themes were drawn. Then, to assess the effect of positive psychological components and themes on teachers' competencies and their mental health and students' personal and academic abilities, the opinions of 80 high school principals in Isfahan were evaluated using a researcher-made questionnaire. Data were analyzed by comparison of means and sample t-test using SPSS 19 software.
Findings: 104 basic and five organizing themes were extracted from the texts of the Positive Psychology book written by Seligman; positive emotion empowerment, fascination (flow), positive relationships, meaning (goal), and achievement (success). Also, from the perspective of principals, positivist components and themes had a positive and above-average effect on improving teachers' positive mental characteristics, teachers' mental health and efficiency, teachers' organizational behavior and interactions, and improving teachers' abilities and students' overall progress (p<0.0001).
Conclusion: Positive psychology has practical and useful components and themes to enhance teachers' abilities and mental health and can be taught by teachers in various curricula.
Volume 12, Issue 1 (Winter 2024)
Abstract
Aims: The current study aimed to investigate the impact of an educational intervention focusing on positive emotions and anger management on fostering positive emotions, mitigating negative emotions and anger, enhancing emotional regulation, and improving the mental and physical health of teachers.
Materials & Methods: The current research employed a quasi-experimental design with pre-test, post-test, and a two-month follow-up. The statistical population comprised 420 elementary school teachers in the 5th district of Isfahan City in 2021, from which 40 individuals were selected as participants using convenience sampling. They were then divided into two groups; one receiving training on cultivating positive emotions and managing anger, and a control group. Participation was voluntary. Data was collected using a 50-item scale assessing positive and negative emotions, anger management, emotional regulation, mental health, and physical health of teachers. Data analysis was conducted using univariate analysis of variance. A follow-up test to assess the intervention’s impact on fostering positive emotions and anger management was conducted after two months.
Findings: The educational intervention on positive emotions and anger management improved mental health, emotion regulation, and physical health, increased the level of positive emotions, and decreased the level of negative emotions of teachers.
Conclusion: Implementing training focused on cultivating positive emotions and managing anger, rooted in the principles of positive psychology, enhances and boosts emotional regulation, as well as the mental and physical well-being of teachers.
Volume 16, Issue 88 (6-2019)
Abstract
Roasting is an important step in nuts processing and one of the ways to improve the color, flavor and unique aroma and taste, which can, in addition to positive changes, reduce the amount of nutrients in the nuts. So, It is very important to select the appropriate conditions for roasting. In this study, the effect of infrared (IR) power (400-600 W) and roasting time (4-10 min) on energy consumption, color parameters (L*, a*, b* value, ΔE, BI, SI, WI, hº), texture, moisture content and sensory properties of sunflower kernel were investigated. In addition, the regression models for the responses were obtained and the proper roasting conditions were determined using response surface methodology (RSM). Quadratic model was proposed for color change (L*، a* ،ΔE، hº، WI) and linear relation for texture, BI and moisture content and 2FI for energy consumption. Roasting at 492.5 W IR power for 9.1 min were found to be convenient or proper roasting conditions. Also, roasted kernels had acceptable quality in terms of sensory properties compared to the conventional method (hot air).
Volume 16, Issue 88 (6-2019)
Abstract
Roasting is an important step in nuts processing and one of the ways to improve the color, flavor and unique aroma and taste, which can, in addition to positive changes, reduce the amount of nutrients in the nuts. So, It is very important to select the appropriate conditions for roasting. In this study, the effect of infrared (IR) power (400-600 W) and roasting time (4-10 min) on energy consumption, color parameters (L*, a*, b* value, ΔE, BI, SI, WI, hº), texture, moisture content and sensory properties of sunflower kernel were investigated. In addition, the regression models for the responses were obtained and the proper roasting conditions were determined using response surface methodology (RSM). Quadratic model was proposed for color change (L*، a* ،ΔE، hº، WI) and linear relation for texture, BI and moisture content and 2FI for energy consumption. Roasting at 492.5 W IR power for 9.1 min were found to be convenient or proper roasting conditions. Also, roasted kernels had acceptable quality in terms of sensory properties compared to the conventional method (hot air).
Volume 19, Issue 4 (9-2017)
Abstract
Objective: Melanoma differentiation association gene-7 (MDA-7)/IL24 is a tumor suppressor gene. The iNGR peptide sequence, with excellent tropism to surface integrins has been employed for targeting of therapeutic molecules toward tumor cells. The purpose of our study was to construct a plasmid expressing modified MDA-7 fused with an iNGR peptide for better targeting to tumor cells.
Methods: At first, we amplified the MDA-7 sequence by PCR, while the reverse primer contained the iNGR peptide sequence to add it to the end of a new MDA-7 gene. The resultant MDA7-iNGR and MDA-7 were cloned into a pCDNA3.1 eukaryotic expression vector. The accuracy of cloning methods, integrity of the plasmids, and sequence were sequentially evaluated by digestions, colony-PCR, and sequencing. The expressions of the plasmid constructs were assayed by ELISA following their transfection into Ad-293 cells. Next, the plasmids were transfected into Hep-G2 cells and their mRNA were converted to cDNA. We assessed the gene expression levels of Gadd153 and Bax. As the final step, apoptosis induction of Hep-G2 cells following transfection was evaluated by the help of PI/Annexin V staining according to flow cytometry.
Results: The results showed the integrity of construct backbone in addition to reading frame of the MDA-7-iNGR sequence. A suitable expression/secretion of modified the MDA-7.iNGR protein was detected by ELISA assay of the culture supernatant when compared to the control construct that expressed unmodified MDA-7. The viabilty test demonstrated no benefit for this kind of modification of the MDA-7 protein. Real-time PCR and flow cytometry analyses revealed that the addition of iNGR to MDA-7 caused a decrease in its apoptotic effect on hepatic tumor cells compared to the normal protein. The modified protein had significant apoptosis induction compared to the negative control group (P<0.01).
Conclusion:Although the new pCDNA/MDA-7.iNGR plasmid expressed iNGR-fused MDA-7 protein efficiently, it could not improve the natural apoptosis property of normal MDA-7.
Mohammad Reza Bagheri, Masoud Mosayebi, Asghar Mahdian, Ahmad Keshavarzi,
Volume 19, Issue 8 (August 2019)
Abstract
The present paper applies a multi-objective genetic algorithm for optimally design of a vehicle suspension. The vehicle model considers three-dimensional movements of vehicle body. In this full vehicle model having 8 degrees of freedom, vertical movement of passenger seat, vehicle body, and 4 tires as well as rotational movements of vehicle body create the degrees of freedom of the model. In this paper, applicable suspension parameters, consisting of passenger seat acceleration, vehicle body pitch angle, vehicle body roll angle, dynamic tire force, tire velocity, and suspension deflections are considered and optimized in optimization process. Different pairs of these parameters are selected as objective functions and optimized in multi-objective optimization processes, and Pareto solutions are obtained for pair of objective functions. In final optimization process, the Pareto solution related to the summation of dimensionless parameters in one suspension parameters group versus other group, is derived. In these Pareto solutions, there are important optimum points and designers can choose any optimum points for a particular purpose. Pareto optimization is better than other multi-objective optimization methods because there are more optimum points on Pareto front, where each point represents a level of optimization for the pairs of objective functions, and designers can choose any of the points to specific purpose.
A. Mokhtari, ُُs. Yousefi , M. Mosayebi ,
Volume 19, Issue 9 (September 2019)
Abstract
In the wind tunnels, the balance measurement instrument is used to measure six components of force and moment on an airplane model. The balance of measurement consists of two parts of the balance structure and electronic equipment. In this research, a mechanism with flexible hinges is designed to achieve the desired configuration of the balance structure. In the process of designing the geometric structure of this mechanism, an effective arrangement has been implemented for the six load cell - flexure columns. The advantages of flexible hinges in comparison to conventional hinges are the absence of friction, compactness and its linear behavior. The reaction effects of the components of force and moment on each six load cell - flexure columns created the coupling errors. One of the main sources of this kind of error is related to the structure of the balance mechanism. The reason for this type of error is the inadequacy of the axial flexibility to the lateral flexibility of the columns. The aim of this research is to optimize the design of the flexible mechanism in order to achieve the minimum coupling error of the structure. For this purpose, hinge design considerations and analytical equations of the flexible mechanism have been extracted. The design of the balance mechanism is optimized by creating a structure coupling error matrix. To validate the analytic equations and results, the problem is compared with the finite element analysis. The results indicated that the measurement errors decrease in the measurement of six components of force and moment of balance.
