Showing 6 results for shaterzadeh
Volume 2, Issue 4 (12-2017)
Abstract
Background: This study aimed to assess the influence of video games on voice learning in students of speech therapy.
Methods & Materials: This study was a clinical trial study in which 102 fifth semester students of speech therapy group of Ahvaz Jundishapur University of Medical Sciences took part and were divided into two groups. The first group included 27students who were admitted in the university from 2008and2009 trained in traditional training and the second group (N = 75) who were admitted in 2010, 2011, 2012, and 2013 spent their traditional training plus using the software of Avaz-e-Ma. at the end of each semester. Students' satisfaction of the learning of each group was obtained through using the qualitative scale and the final exam of each group. The relationship between the learning type and the student scores was analyzed using Pearson correlation coefficient and the difference between of both groups were analyzed by independent T-test.
Results: The mean age of the first and the second group were 20.11 ± 3.02 and 20.25 ± 2.12 years old respectively. The mean score of the students who learned by software were 18 ± 0.2 and the students by traditional way was 12 ± 0.2 that was significant difference (P < 0.001). The majority of the students (90%) believed that the use of software has been useful.
Conclusion: The use of educational games in the classroom leads to an increase in the students' grades and the satisfaction of the students with the quality of instruction. Accordingly, using technology in educational system is recommended.
Volume 3, Issue 3 (Summer 2018)
Abstract
Aims: In this study we examined the use of Virtual Reality (VR) in oral organs assessment training in speech therapy students.
Method: The population of this study included 35 fifth term students of speech therapy in Jundishapur Medical Science University of Ahvaz. The first group was 18 students entering university in 1394 passed oral function assessment course through traditional training method. The second group was 17 students entering university in 1395 passed this course through traditional training method with Virtual Reality. 3D (Three-Dimensional) glasses and a monitor are the tools applied in Virtual Reality technique allowing the student to touch the oral organs and experience various oral functions recognition.
Findings: The first group was 20-22 years old (20.35±2.14) and the second group was 20-22 years old (20.18±3.06). The mean and standard deviation of the final score in students used Virtual Reality was 18.57±1.31 and for the students used traditional method were 14.35±2.15. Independent-T test showed a meaningful difference between the two groups (p<0.001).
Discussion: Using Virtual Reality in classroom resulted in an increase in students' scores. Hence taking into account the great importance of teaching method, its effect on the society and health organization, it is necessary for the education system to use a technology which increases teaching quality and creates more effective learning in students.
Volume 3, Issue 3 (Summer 2018)
Abstract
Aims: This study aimed at examining the effect of caricature on the score of family counseling in the internship training unit and the degree of satisfaction of the trainers of the internship unit from the performance of speech therapy students in Ahvaz.
Materials & Methods: The population of the study consisted of 74 students of the 5th semester of speech therapy of Ahvaz Jundishapur University of Medical Sciences admitted to the university during 2013 to 2016 divided into two groups. The first group consisted of 39 students (2013 and 2014) and had passed patient counseling with the conventional method, the second group included 35 students (2015 and 2016) and had spent patient counseling of the speech disorder course with the help of caricatures. At the end each semester, trainers in both groups scored their satisfaction with the students’ performance, using a 4-degree qualitative scale, the internship scores of both groups were recorded.
Findings: The mean and standard deviation for the internship of students, who passed patient counseling using caricatures was 18.92±0.70, and for the students, who studied the voice topic with the traditional method was 14.84±1.05. Independent t-test showed the significance of this difference between the two groups (p<0.001). 90% of the trainers acknowledged that teaching with caricatures is more effective than the conventional teaching for offering counseling service to patients.
Conclusion: The use of caricatures in classroom has led to an increase in the ability of students to consult a patient with voice disorder. It also leads to increased satisfaction of internship trainers.
Ali Reza shaterzadeh, Kamran Foroutan,
Volume 15, Issue 7 (9-2015)
Abstract
Careful and numerical analysis eccentrically stiffened shells in the industry is a major step forward in the design of these shells. In this paper, a careful analysis of post-buckling behavior of eccentrically stiffened FGM thin circular cylindrical shells is surrounded by an elastic foundation and external pressure is presented. The two parameter elastic foundation based on Winkler and Pasternak elastic model is assumed. Stringer and ring stiffeners are internal. Shell properties and eccentrically stiffened are FGM. Fundamental relations and equilibrium equations are derived based on the smeared stiffeners technique and the classical theory of shells and according to von- Karman nonlinear equations. The three-term approximation for the deflection shape, including the pre-buckling, linear buckling shape and nonlinear buckling shape was chosen that using the Galerkin method, the critical load and post-buckling pressure-deflection curves is calculated. The effects of different dimensional parameters, buckling modes, volume fraction index and number of stiffeners are investigated. Numerical results show that stiffeners and elastic foundation enhance the stability of the shells. Increasing the shell thickness, reducing the volume fraction index, raising the number of Stringer and ring stiffeners and applying foundation elastic, causes the critical buckling load is increased, too.
Sara Karamian, Alireza shaterzadeh,
Volume 18, Issue 2 (4-2018)
Abstract
Exact and numerical solution of eccentrically stiffened panels in the industry is a major step forward in the design of these structures. This paper presents an analytical approach to investigate the nonlinear stability analysis of eccentrically stiffened thin FG cylindrical panels on elastic foundations subjected to hygro-thermo-mechanical loads. The stiffeners are assumed to be spiral-type. The panel has the initial geometrical imperfection. The material properties are assumed to be temperature-dependent and graded in the thickness direction according to a simple power law distribution. The elastic foundation is considered based on Winkler and Pasternak proposed model. Governing equations are derived basing on the Lekhnitsky smeared stiffeners technique and classical shell theory incorporating Von Karman-Donnell geometrical type nonlinearity. Explicit relations of load–deflection curves for FG cylindrical panels are determined by applying stress function and Galerkin method. The effects of angel of stiffener, different dimensional parameters, volume fraction index, initial geometrical imperfection, the stiffness of elastic foundation and moisture concentration on the postbuckling of FG panel are investigated. Also effects of temperature gradient through the thickness and effects of different boundary conditions are investigated for thermo-mechanical loading. The obtained results are validated by comparing with those in the literature.
Mohammad Raeisi, Alireza shaterzadeh, Seyyed Mahdi Hosseini Farrash,
Volume 20, Issue 12 (December 2020)
Abstract
An experimental study on the critical buckling load of aluminum columns reinforced with glass/epoxy composite belts containing carbon nanotubes (CNTs) are presented in this paper. The columns with solid circular cross section are subjected to axially pressure load. Aluminum column specimens reinforced with glass/epoxy and CNT/glass/epoxy are fabricated. CNTs with 0.25, 0.5 and 1 weight percent (wt.%) are dispersed into the epoxy resin. Three layers composite belts are wrapped around the column. Glass fibers are placed along the column axes in each layer. The columns are tested under fix ended boundary conditions utilizing Instron hydraulic universal testing machine. Pressure load with respect to the end shortening are plotted for each specimen. To achieve the average value of critical buckling load, four specimen is examined for each composite belt material. Results show that when 0.5%CNT/glass/epoxy composite belt is used to reinforce the column, the critical buckling load of the column increases by 45% with respect to the column with glass/epoxy composite belt. The proper dispersion of CNTs into the matrix material along with appropriate adhesion between the nanocomposite belt and the aluminum column lead to the increase of buckling load. Furthermore, to validate the results, buckling analysis of aluminum column reinforced with glass/epoxy composite belt was done in Abaqus finite element software. Finite element simulation confirms the experimental results obtained.
