Showing 14 results for Vijeh
Volume 2, Issue 1 (3-2014)
Abstract
Aims: Drug abuse among college students continues as a major public-health concern. Theory-driven research is necessary to address and find causes. The current research investigates the utility of Theory of Planned Behavior (TPB) in designing and implementing a drug abuse educational prevention program among medical college students. Methods: This quasi-experimental study was conducted among 120 college students in two groups: experimental and control, who were randomly enrolled at the baseline survey. We used a questionnaire, which included three sections of background data (11 questions), knowledge about the side effects of drug abuse questionnaire (16 questions), and TPB-based questionnaire (20 questions). Educational planning was based on active learning with using group discussion, printed leaflet, and audio-visual CD. The participants were followed up after 2-month intervention. Data were analyzed by the SPSS software version 16 using appropriate statistical tests such as stepwise multiple logistic regressions and t-test. Findings: Almost 6.7% of the participants had a history of drug abuse. The three predictors of 1) attitude, 2) subjective norms, and 3) perceived behavioral control accounted for 48 % of the variation in the outcome measure of the intention to drug abuse. There was a significant improvement in average response for knowledge about the side effects of drug abuse and TPB variables among the students who were under intervention (P < 0.05). Conclusions: Designing intervention to reduce positive attitude and subjective norms toward drug abuse among college students could be useful to substance abuse prevention.
Volume 3, Issue 1 (3-2015)
Abstract
Aim: Considering the fundamental role of parents' function and family dynamics including the importance role of family communication pattern on preventing early-onset substance use in children, the present study aimed to determine the correlation between family communication pattern and mothers' preventive behavioral intention regarding preventing early-onset substance use in children.
Methods: This cross-sectional study was carried out among 234 Iranian mothers in Tehran who were randomly selected to participate voluntarily in the study. The participants filled out a self-administered questionnaire including I- demographic information; II- family-based behavioral intention regarding preventing early- onset substance use in children; and III- family communication pattern. Data were analyzed by the SPSS software (ver. 21.0) using Pearson's correlations, independent t-test, and ANOVA at 95% significant level.
Findings: The results reported a correlation between conversation (r=0.509**& P≥0.001), conformity orientation (r= -0.150*& P=0.022) and behavioral intention; as well as between conversation conformity orientation (r= -0.382*& P≥0.001), and conversation (r=0.218**& P=0.001), conformity orientation (r= -0.105& P=0.108) and age.
Conclusion: The findings suggest that to develop a preventive program, it will be useful to increase family communication pattern, specially conversation orientation to prevent the onset of substance use in children.
Volume 6, Issue 2 (9-2016)
Abstract
According to great number of experts, having a distinct positioning regarding other competitors in one or more cases, are Critical factors of industrial success. These CSFs can create a golden and exceptional opportunity to gain a competitive advantage. Therefore, main goal of this study is to identify and prioritize CSFs in lubricants industry of Iran. Research method is practical use and as data collecting method is descriptive – survey. Interviews and questionnaires used to collect data in research population which is Iran lubricants industry experts. In this study, Thompson and Strickland models has been used to identify these factors. This model define critical success factors in seven different dimension and sets indicators for each one. Based on those factors and network analysis process a questionnaire has been prepared and has been placed at the disposal of industry experts. Obtained data were analyzed by using "super decision" software and five factors of " experience in product innovation", "technical knowledge", "production quality", "access to raw materials and additives", "access to skilled labor" were identified as critical success factors in this industry. Therefore successful companies in this field can gain the competitive advantages investing on these factors.
Volume 6, Issue 4 (Fall 2018)
Abstract
Aims: Health and behavior are closely related subjects because lots of diseases are rooted in individuals’ unhealthy behaviors and habits. The current study aimed at identifying barriers and strategies of overcoming barriers in healthy nutritional behaviors in women.
Participants and Methods: This qualitative study was conducted in 2014 based on content analysis. The participants were 50 married women with the age range of 18 to 50 years old referring to 4 healthcare centers in Sanandaj, who were selected by purposive sampling. Using semi-structured interviews, the data were collected through group discussions and individual in-depth interviews. A thematic analysis approach was applied for data analyses and MAXQDA 10 software was employed to analyze the data.
Findings: Of the total interviews and discussion groups, 200 initial codes were obtained and they were grouped into 4 categories, including individual barriers, social barriers, overcoming individual barriers, and overcoming social barriers. Lack of awareness and healthy cooking skills, unhealthy diet of parents as a negative role model, laziness of wives and women, lack of time, lack of mental relaxation, illiteracy economic issues, and the role of government were mentioned by the participants as individual and social barriers.
Conclusion: Barriers in healthy nutritional behaviors from women's perspective are devided into individual and social barriers and some strategies are mentioned to overcome these barriers, including learning required skills in terms of healthy diet/nutrition, raising awareness, time management, monitoring the contaminated foods by the government, providing public information, training through media, and resolving economic problems.
Volume 10, Issue 3 (Summer 2022)
Abstract
Aims: Today, it is essential that new technologies such as smartphones and their tools, such as applications, be considered in the design of health interventions. The purpose of this study was to determine the efficiency of educational intervention in promoting communication skills among students using the mHealth approach based on the theory of planned behavior.
Material & Methods: We conducted a quasi-experimental intervention study among 160 university students at Kermanshah University of Medical Sciences in 2020. Data were measured using a self-report questionnaire based on the theory of planned behavior constructs. Results were measured at the beginning and two months after the intervention. Data were analyzed by SPSS 16 using Chi-square, independent samples t-test, and paired sample t-test.
Findings: The mean age of students was 21.88±2.51 years old. Our findings showed the efficiency of the intervention in increasing the scores of attitude (32.05 increased to 32.76; p=0.005), subjective norms (12.19 increased to 12.40; P=0.038), and behavioral intention (10.32 increased to 11.95; p<0.001) towards learning communication skills in the intervention group. Also, the estimated effect sizes for attitude, subjective norms, and intention were 0.48, 0.23, and 0.72, respectively.
Conclusion: We have shown that the tested mHealth program has been effective in promoting attitudes, subjective norms, and intentions to learn communication skills. Given the availability of this technology, it seems that it can lead to useful findings in promoting youth health.
Volume 12, Issue 4 (3-2013)
Abstract
The Direct Torque Control (DTC) of Interior Permanent Magnet Synchronous Motor (IPMSM) offers simple structure and fast torque response. The conventional Switching Table-based DTC (ST-DTC) presents some disadvantages like high torque and flux ripple and also variable switching frequency. This paper investigates the improved ST-DTC strategies to reduce both torque and flux ripple in DTC of IPMSM with emphasis on structure simplicity and fast dynamics. New switching table with only two active vectors for each sector is introduced and the torque control hysteresis band is replaced by duty cycle calculation unit. For flux ripple reduction, conventional hysteresis-based controller is replaced by simple dithering technique. The duty cycle calculation unit is implemented to operate on each selected vector with the aim of torque ripple RMS minimization. The increase of switching frequency in ST-DTC because of delay in torque and flux estimation process, actually, is not possible; even when hysteresis bands are sufficiently diminished. This paper incorporates the combination of duty cycle modulated DTC and dithering technique to enlarge switching frequency. It therefore provides smoother waveform concurrently for the motor torque and the flux. In the proposed method waveform comparison structure for duty cycle calculation is used; hence, the merits of classical ST-DTC, such as fast dynamic and simple structure, are mostly preserved
Volume 13, Issue 1 (4-2013)
Abstract
The most prominent feature of sheet material forming process is an elastic recovery phenomenon during unloading which leads to springback and side wall curl. Therefore evaluation of springback and side wall curl is mandatory for production of precise products. In this paper, the effects of some parameters such as friction coefficient, sheet thickness, yield strength of sheet and blank-holder force on the springback and side wall curl radius in U-bending of dual phase steel sheets were investigated by performing experimental tests and finite element method. ABAQUS software was used for finite element simulation. Comparison of experimental and finite element results shows good agreement. The results of this research shows that increasing of sheet thickness, reduces springback and side wall curl and increasing of yield strength increases springback and side wall curl. Springback and side wall curl initially increase with raising the friction coefficient and blank-holder force but they decrease again when they go beyond certain values.
Volume 14, Issue 3 (11-2024)
Abstract
In recent years, digital transformation has created a revolution in the way companies do business and their relationships with customers, suppliers, and other stakeholders, and has led to the growth of innovation and increased value offered to customers. On the other hand, some organizations, lacking a deep understanding of the concept of digital transformation, consider it a partial and project concept; This is despite the fact that digital transformation is a complex and continuous activity that can significantly affect a company and its activities. In fact, digital transformation can be seen as a deep transformation of business activities, processes and technologies to take advantage of opportunities and changes through a combination of digital technologies. Now, in this article, we are going to examine the digital transformation with the Meta Synthesis method. The present research is applied from the point of view of the goal, and in this research, the Meta Synthesis method and the approach of Barroso and Sandelowski (2007) have been used to review the research literature. The statistical population of the research includes research conducted in the field of digital transformation. The data collection tool is open coding to identify themes and components of digital transformation. In this study, to identify the components of digital transformation, 36 codes were identified as basic themes. Among these, 16 codes were selected as organizing themes and 4 codes were identified and formed as overarching themes with the titles of "planning, soft structures, capabilities, technology and communication".
Mohammad Reza Vijeh*,
Volume 14, Issue 4 (Winter 2011)
Abstract
Nowadays, the Rule of Law has progressed from doctrinal stage into a dominated concept in Public Law. This concept is capable of becoming compatible with any legal system. At the same time, it is flexible and relative enough to be able to accept the legal and social values of different societies. This article has been written to reply to the doubts and questions about the nature and functions of the Rule of Law. To obviate the existing doubts concerning the Rule of Law, initially, the theoretical principles of this concept shall be recognized.
Furthermore, from different aspects, it is made of many parts. Some of these parts conduct the normative shape and cadre of the Rule of Law, which bring this issue to realization in two aspects: they either arrange its structure similar to the principles of Separation of Powers and jurisdictional independence or like the principle of Hierarchy of Norms arrange the normative cadre. Moreover, there are some other items such as Legal Security and Equality, which facilitate to bring into realization the ultimate Rule of Law, supporting the fundamental rights and liberties.
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Volume 16, Issue 6 (8-2016)
Abstract
Simultaneous localization and mapping (SLAM) is a fundamental problem in autonomous robotic. Many algorithms have been exploited to solve this problem, among these algorithms, FastSLAM is one of the most widely used and Unscented FastSLAM is one of the newest. Although in several scientific researches it is stated that Unscented FastSLAM outperforms FastSLAM, there are still unexamined potentials regarding Unscented FastSLAM. Therefore, this paper seeks to improve the overall performance of Unscented FastSLAM. Map accuracy and quality directly depend on the accuracy of localization and observations. In SLAM algorithms, robot pose is predicted using motion model, and then corrected using the difference between map features and recently observed features. Accuracy of pose estimation may improve by comparing two sequential observations and modifying robot pose to result in best match between them. This method is called scan matching and has been successfully combined with FastSLAM algorithm and some other SLAM algorithms not including Unscented FastSLAM. Therefore, this paper seeks to investigate the performance of Unscented FastSLAM combined with scan matching. Simulation results show that combining Unscented FastSLAM with scan match significantly improves accuracy of localization and mapping.
Ibrahim Azizi1*, Mohsen Amiri2, Mohammad Reza Vijeh3,
Volume 17, Issue 1 (Spring 2013)
Abstract
The present study involved a critical investigation of typical judge selection approaches in the legal system of the United States of America (USA), comparatively mapping the results onto Iran’s legal system. The results indicated that despite being a political process, the US’ M.O. of federal judge selection has no consequences for the judges’ procedural independence, owing to the prevailing security of tenure. Like-wise, notwithstanding the judicial independence-related problems and challenges it has effected, state-level judge selection has brought about promising prospects, as evident in the reluctance of the US’s legal system to set aside judicial election procedures. Also the comparative study of the US’s and Iran’s legal systems revealed that the political and beliefs-related prerequisites pre-ordained in the prospective judges’ qualifications list and judge appointment approaches by the Iranian policy-making body has, on the one hand, served to deny Iranian judges’ rights for democratic functioning, and left them owing to key political figures, on the other.
Volume 17, Issue 8 (10-2017)
Abstract
The most essential problem in lapping process is low material removal rate which leads to increase in production costs and time. Thus, in this process, it's essential to select a condition that besides producing pieces with required flatness and roughness, has a high material removal rate. In this research, effects of parameters such as abrasive particle size, abrasive particles concentration in slurry, and lapping pressure on material removal rate, flatness and surface roughness were studied by experimental method in single sided lapping of flat workpieces made of 440c steel. In the following, effect of aforementioned parameters on material removal rate, flatness and surface roughness of lapped surface has been modeled using artificial neural network. Finally, by exerting multi-objective particle swarm optimization, simultaneous optimization of material removal rate, surface roughness and flatness of lapping pieces has been conducted and related Pareto front has been obtained. Obtained results show that by using Multi-objective particle swarm optimization algorithm we can produce workpieces with required surface roughness and flatness with high material removal rate. Consequently, by using this method moreover producing workpieces with desired quality, production cost and time would decrease.
Mohsen Amiri, Mohamadreza Vijeh,
Volume 18, Issue 3 (Fall 2014)
Abstract
As a main path to the implementation of a fair trial and rule of law‚ judicial independence amounts to the judge’s independence of any imposition or interference from the political powers and parties involved. Operationalization of judicial indepdence is‚ on the one hand‚ contigent upon the structural independence of the judicial system‚ and on devising certain approach for ensuring the individual independence of the jugdes‚ on the other. The present study involves the illumination and investigation of the concept of judicial independence and "how" of verbalizing this principle in Iran and France’s legal systems. This comparative study indicates that Iran’s legal systems has‚ compared to france, put forth more reliabe guarantees for the structural independence of the judiciary system. However‚ it still has some drawbacks in terms of judge’s indicidual independence.
Erfan Khalilvandi, Mohammareza Vijeh,
Volume 28, Issue 4 (1-2025)
Abstract
The Social Rule of Law is a type of the rule of law, originating from the tradition of social democracy. The research aims to examine the evolution of the rule of law into a socially-oriented model, focusing on its principles, goals, and structure. Key research questions address the essence, goals, and functions of the Social Rule of Law. The research uses a descriptive method and the data collection tool is library. Hermann Heller, as the founder of the concept, argues that democratic-based approach allows for the harmonization of the rule of law with social orientation, showing similarities between the Social Rule of Law and the Liberal Rule of Law. The findings of the research show that the Social Rule of Law reconfigures the private sphere in order to safeguard the social rights of citizens, eliminating social oppression within civil society. Its primary functions include monitoring private relationships between citizens and ensuring social security through the involvement and control of the government. The critical requirements for this system include expanding the executive, strengthening social legislation, ensuring substantive equality, and increasing the powers of the judiciary and parliament to deal with social rights.
