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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Interdisciplinary Journal of Virtual Learning in Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Smart Schools,Technology Acceptance,TAM model
- چکیده:
- چکیده انگلیسی: Background: The rapid growth of information and communication technology has brought about substantial changes in educational practices and approaches. Education and training have received more attention in view of technological developments and emerging requirements. The aim of this study was to investigate school principals’ application of Technology Acceptance Model (TAM) in smart schools of Qom, Iran. Methods: This was a descriptive-correlational study. The study population included all smart school principals in Qom in 2018. Purposeful sampling was applied to identify and select 70 principals as the participants of the study. Davis’ TAM questionnaire with a reliability coefficient of 0.78 was used for data collection. Descriptive statistics, including mean and standard deviation, were calculated for data analysis, and Pearson correlation coefficient was used in the inferential analysis. Results: Significant positive relationships were observed between perceived usefulness and attitude towards the use of technology (r=73, p <0.01), perceived usefulness and willingness to use technology (r=64, p <0.01), perceived ease of use and attitudes towards the use of technology (r=39, p <0.01), perceived ease of use and perceived usefulness of technology (r=43, p <0.01), and finally the tendency to use and actual use of technology (r=63, p <0.01). Conclusion: In order to improve the performance of smart schools, it is recommended to cultivate a positive and constructive attitude towards technology among principals and teachers in a dynamic way.
- انتشار مقاله: 24-02-1399
- نویسندگان: Shahram Mehravar Giglou,Ali Rashidi,Zahra Manidari
- مشاهده
- جایگاه : پژوهشی
- مجله: Interdisciplinary Journal of Virtual Learning in Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Introduction Positive psychology interventions with focus on strengths of individual, is one of the new approaches in helping people due to develop their ability and emits .the aim of this study was to determine the effectiveness of positive thinking skills on academic procrastination of high school female students. Methods Research type was semi-experimental, pretest-posttest design with control group. Population was all female high school students in 3 section education organization Kermanshah city, 2014-2015. The research sample included 120 female from 22 Bahman high school students who were selected through multistage random cluster sampling method and then based on entrance and existence criteria assigned into two groups (experimental and control) randomly. The instruments used were academic procrastination Scale (validity = 0.65 & reliability = 0.83). The positive thinking skills intervention included 8 sessions, each 90 minutes, twice in week for experimental group. Because of effectiveness these interventions sessions were applied for control groups after posttest. Data analyzed with analysis of covariance using spss-21. Results The results showed that positive thinking skills is effective on academic procrastination of high school female students (P ≤ 0.001). Conclusions Regarding the divergences between two groups' positive skills training scan be effective in reducing procrastination. Findings indicated the necessity of applying positive thinking program training in schools due to reducing academic procrastination and increasing success and progress of their academic performance in students.
- انتشار مقاله: 11-10-1348
- نویسندگان: Somayeh Moradi,Alireza Rashidi,Mohsen Golmohammadian
- مشاهده
- جایگاه : پژوهشی
- مجله: Energy Equipment and Systems
- نوع مقاله: Journal Article
- کلمات کلیدی: Exergy analysis,Biomass gasification,Multiobjective Optimization,Pareto Front,Differential Evolution Algorithm,Local Unimodal Sampling
- چکیده:
- چکیده انگلیسی: Biomass gasification is the process of converting biomass into a combustible gas suitable for use in boilers, engines, and turbines to produce combined cooling, heat, and power. This paper presents a detailed model of a biomass gasification system and designs a multigeneration energy system that uses the biomass gasification process for generating combined cooling, heat, and electricity. Energy and exergy analyses are first applied to evaluate the performance of the designed system. Next, the minimizing total cost rate and the maximizing exergy efficiency of the system are considered as two objective functions and a multiobjective optimization approach based on the differential evolution algorithm and the local unimodal sampling technique is developed to calculate the optimal values of the multigeneration system parameters. A parametric study is then carried out and the Pareto front curve is used to determine the trend of objective functions and assess the performance of the system. Furthermore, sensitivity analysis is employed to evaluate the effects of the design parameters on the objective functions. Simulation results are compared with two other multiobjective optimization algorithms and the effectiveness of the proposed method is verified by using various key performance indicators.
- انتشار مقاله: 29-06-1396
- نویسندگان: Halimeh Rashidi,Jamshid Khorshidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Computational Methods for Differential Equations
- نوع مقاله: Journal Article
- کلمات کلیدی: Convergence analysis,Non-polynomial spline function,B-spline function,Nonlinear Klein-Gordon equation
- چکیده:
- چکیده انگلیسی: In this paper we develop a non polynomial cubic spline functions which we called ”TS spline”, based on trigonometric functions. The convergence analysis of this spline is investigated in details. The definition of B-spline basis function for TS spline is extended and ”TS B-spline” is introduced. This paper attempts to develop collocation method based on this B-spline for the numerical solution of the nonlinear Klein-Gordon equation. The convergence analysis of this approach is discussed, the second order of convergence is proved consequently. The proposed method is applied on some test examples and the numerical results are compared with those already available in literature. Observed errors in the solutions show the efficiency and numerical applicability of the proposed method.
- انتشار مقاله: 20-03-1397
- نویسندگان: Homa Zadvan,Jalil Rashidinia
- مشاهده
- جایگاه : پژوهشی
- مجله: Computational Methods for Differential Equations
- نوع مقاله: Journal Article
- کلمات کلیدی: Convergence analysis,Singularly perturbed boundary-value problems,Tension spline,Boundary formula
- چکیده:
- چکیده انگلیسی: We develop a class of new methods based on modification of polynomial spline function for the numerical solution of singularly perturbed boundary-value problems. The modified spline contains the exponential terms and named by tension spline, which is infinity smooth. Tension spline contain parameter, by choosing arbitrary values of such parameters the various classes of spline can be obtained. The proposed methods are accurate for solution of linear and non-linear singularly perturbed boundary-value problems. Boundary formulas are developed to associate with spline methods. These methods are converging. The analysis of convergence is shown to yield up to O(h^8 ) approximation to the solution of singularly perturbed boundary-value problems. Comparison are carried out, numerical examples are given to showing the efficiency of our methods
- انتشار مقاله: 21-08-1397
- نویسندگان: Karim Farajeyan,Jalil Rashidinia,Reza Jalilian,Nader Rafati Maleki
- مشاهده
- جایگاه : پژوهشی
- مجله: Computational Methods for Differential Equations
- نوع مقاله: Journal Article
- کلمات کلیدی: Gaussian radial basis functions,Eigenfunction expansion,Helmholtz equations,Sylvester system
- چکیده:
- چکیده انگلیسی: Radial basis functions (RBFs) are a powerful tool for approximating the solution of high-dimensional problems. They are often referred to as a meshfree method and can be spectrally accurate. In this paper, we analyze a new stable method for evaluating Gaussian radial basis function interpolants based on the eigenfunction expansion. We develop our approach in two-dimensional spaces for solving Helmholtz equations. In this paper, the eigenfunction expansions are rebuilt based on Chebyshev polynomials which are more suitable in numerical computations. Numerical examples are presented to demonstrate the effectiveness and robustness of the proposed method for solving two-dimensional Helmholtz equations.
- انتشار مقاله: 26-06-1396
- نویسندگان: Jalil Rashidinia,Manoochehr Khasi
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Industrial Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: maintenance,Mathematical Modeling,Aircraft Routing,Ramping
- چکیده:
- چکیده انگلیسی: The problem of routing and maintenance programming is one of the most important complex issues of aviation systems. Therefore, the factors that increase the delays and costs and make the passengers unsatisfied must be identified. Among these factors, is the time required for airplane ramping, inspection and maintenance operations that directly affect flight delay and related costs. This paper provides two new models for maintenance programming based on flight hours and scheduling of airplane ramp operations, which minimizes costs and delays. Two mathematical models are solved in GAMS and sensitivity analysis is performed for each. Results of sensitivity analysis show that an increase in the number of aircraft in maintenance model reduces costs, and an increase in the number of machines in ramping model reduces delays. So, based on the result, good performance of the models reduces the costs and delays.
- انتشار مقاله: 04-03-1395
- نویسندگان: Alireza Rashidi Komeijan,Mahsa Shabankareh
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Industrial Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Gender separation,Integer linear programming,School bus routing problem,Special students
- چکیده:
- چکیده انگلیسی: In our country, school bus routes are determined by experiments of driver without considering the scientific optimum route and location. Traversing additional routes will always result an increase in vehicle movements and fuel consumption and enormous costs. Hence, this paper will study the school bus routing in Tehran considering special students and a model will be presented to minimize traveling distance and to prevent repetitive crossings through the bus stops and to determine the shortest routes by presenting a way to propel several students to a bus stop. The proposed model will solve via GAMS software. Because the model is NP-Hard, the Genetic algorithm is used to solve the large scale problem. The contribution of this paper is to consider gender separation in schools and buses. To solve this problem, an integer linear programming model is developed. The conclusion indicates a decrease in transportation time.
- انتشار مقاله: 15-09-1394
- نویسندگان: Alireza Rashidi Komijan,Peyman Ghasemi
- مشاهده