Showing 6 results for jabbarzadeh
Volume 11, Issue 2 (Spring 2023)
Abstract
Aims: Evaluating diabetics’ health-promoting behaviors is an essential part of nursing care. This study aimed to examine the relationship between health-promoting behaviors and perceived social support from the family in patients with type 2 diabetes.
Instrument & Methods: This was a descriptive cross-sectional study. The data were collected from a foundation university hospital in Tabriz, Iran. The sample consisted of 183 type 2 diabetes patients. Data were collected using the Perceived Social Support from Family and Health-Promoting Behaviors scales.
Findings: The average score of social support was 15.07±6.74 (range: 0 to 20), and the average score of health-promoting behaviors was 49.62±17.74 (range: 0 to 112). There was a significant and positive correlation between the scores of health-promoting behaviors and perceived social support (r=0.28, p<0.001). We predicted the changes in health-promoting behaviors based on the regression analysis of the changes in perceived social support from the family (B=0.563).
Conclusions: Family social support affects health-promoting behaviors in type 2 diabetes patients, and should be considered during interventions to improve health-promoting behaviors by nurses and other healthcare providers. We suggest other descriptive correlational studies with a higher sample size and interventional studies on this subject.
Mehrdad jabbarzadeh, , Mahmood Khosravi,
Volume 12, Issue 5 (1-2013)
Abstract
In this paper, the thermal buckling behavior of circular plates with variable thicknesses made of bimorph functionally graded materials, under uniform thermal loading circumstances, considering the first-order shear deformation plate theory and also assumptions of von Karman has been studied. The material characteristics are symmetric to the middle surface of the plate and, based on the power law, vary along with thickness; where the middle surface is intended pure metal, and the sides are pure ceramic. In order to determine the distribution of pre-buckling force in the radial direction, the membrane equation is solved using the shooting method. And the stability equations are solved numerically, with the help of pseudo-spectral method by choosing Chebyshev functions as basic functions. The numerical results in clamped and simply supported boundary conditions and the linear and parabolic thickness variations are presented. And the influence of various parameters like volume fraction index, the thickness profile and side ratio on the buckling behavior of these plates has been evaluated.
Mehrdad jabbarzadeh, ,
Volume 13, Issue 2 (5-2013)
Abstract
Abstract - In this article , thermal buckling analysis of functionally graded annular sector plate is studied. The mechanical and thermal properties of the functionally graded sector plate are assumed to be graded in the thickness direction . The equilibrium and stability equations are derived based on the first order shear deformation plate theory (FSDT) in conjunction with nonlinear von-karman assumptions. Differential quadrature method is used to discretize the equilibrium and stability equations. In this method a non-uniform mesh point distribution (Chebyshev-Gauss-Lobatto) is used for provide accuracy of solutions and convergence rate . By using this method, there is no restriction on implementation of boundary conditions and various boundary conditions can be implemented along any edges . Finally, The results compared with other researches and the effects of plate thickness, sector angle, annularity, power law index and various boundary conditions on the critical buckling temperature are discussed in details .
Mehrdad jabbarzadeh, Habib Talati, Ahmad Reza Noroozi,
Volume 13, Issue 13 (First Special Issue 2014)
Abstract
In this article, nonlinear bending analysis of single-layered circular graphene sheet is studied. The equilibrium equations are derived based on the nonlocal continuum mechanics and principle of virtual work and first order shear deformation plate theory (FSDT). Differential quadrature method is used to discretize the equilibrium equations. In this method a non-uniform mesh point distribution (Chebyshev- Gauss- Lobatto) is used for provide accuracy of solutions and convergence rate. The effect of nonlocal parameter, thickness, number of grid points and lateral loading are investigated on deflection of graphene sheet. The results are compared with valid results reported in the literature.
Mostafa Ahmadi Nokhandan, Mehrdad jabbarzadeh,
Volume 14, Issue 1 (4-2014)
Abstract
This paper presents the first and third order shear deformation plate theory and von Karman theories to solve Thermo-elastic problems of functionally graded hollow rotating disk. The material properties of the disk are assumed to be graded in the direction of the thickness by a power law distribution of volume fractions of the constituents. New set of equilibrium equations with small and large deflections are developed. Using small deflection theory an exact solution for displacement field is given. Solutions are obtained in series form in case of large deflection. Numerical results are presented for various percentages of ceramic-metal volume fractions and have been compared with those obtained using first-and third-order shear deformation plate theories. Also the results are verified with ABAQUS soft, simulink method and the known data in the literature.
Volume 23, Issue 2 (7-2019)
Abstract
Researchers have focused mainly on the importance and determinability of the front end phase in the continuation of collaboration and renewal of the collaborative processes of the organizations involved, but an exploration of the factors to be taken into consideration at the front has been overlooked. Accordingly, this Paper aims at delineation of a framework for inter organizational cooperation in the front-end phase. Interpretive Structural modeling and structural equation modeling are used to analyze the data. The statistical population of the study consists of 9 experts in the Iranian public and private sectors as well as university professors in the Interpretive Structural Modeling section. For the structural equation modeling, the sample consists of 415 employees and managers of the organizations which have been involved in different Inter organizational projects. It is indicated that top management commitment, communication, motivation, shared vision, inter relationships, consistent goals, cooperation culture, trust, joint planning, power distribution, conflict management, creation of control and monitoring systems, creation of information systems, As well as Political and economic uncertainty affect the effectiveness of inter organizational cooperation. It is also demonstrated that the effectiveness of inter organizational cooperation contributes to the value creation and business success.