The Body freedom flutter phenomenon is one of the aeroelastic instabilities that occurs due to the coupling of the aeroelastic bending mode of the wing with the short-period mode in the flight dynamics of the aircraft. By using the aeroservoelastic model and applying closed loop control, this phenomenon can be suppressed in the operating conditions of the aircraft and the velocity of this event can be increased. The simplest model aircraft capable of displaying this instability includes the flexible wing and the planar flight dynamics model. For this purpose, the wing structure is modeled using the Euler-Bernoulli beam and, the theory of minimum variable state is used to model unstable aerodynamics to make the conditions suitable for modeling the system in state space. In the control section, the elevator is used as the control surface and LQR theory with Kalman filter is used to Body freedom flutter suppression. Finally, the effect of adding a closed loop control to increase the Body freedom flutter velocity and the limitations of this work are studied.

The purpose of this study was to predict the academic achievement based on academic Self-Concept and locus of control. The design of this study was correlational-descriptive. The population consisted of all male and female pre-university students in public high schools of Tehran majoring in natural sciences in the academic year of 2014-2015. From this population, 560 male and female students were selected using multi-stage random sampling. The instruments were academic Self-Concept scale, and interiority, powerful people and chance scale. Also, the students’ GPA was considered as the criterion of their academic achievement. Data analysis was performed through Pearson's correlation coefficient and regression analysis in SPSS 21. The results showed a positive significant correlation between academic Self-Concept and locus of control with academic achievement (p<0.01). The result of regression analysis also revealed that almost 23% of students’ academic achievement variance was predicted positively based on academic Self-Concept and internal locus of control. Hence, it can be concluded that by increase of the level of academic Self-Concept and locus of control, the academic achievement increases accordingly. In other words, academic Self-Concept and locus of control are the most important variables in academic achievement of the students.

Introduction. The study of gross anatomy has always been confronted with limitations including deterioration, bad odor of cadaver and fixative solutions. one of the modern preservation techniques is plastination. In this project a whole Body was made by plastination technique.Methods. This study was carried out on a fresh human Body after fixation of the cadaver. It was dissected carefully after 6 months. It was then dehydrated and defated in cold acetone (-25˚6) for 2 weeks and warm (35-40˚c) acetone for 4 weeks. finally it was impregnated by polymer under pressure of vaccum. Results. The plastinated specimens found to be immune from infection, deterioration and flexible without bad odor and showing natural color.Discussion. Plastination is a modern techinque that has many advantages to formaldehyde fixation especially for our country with limited source of Body donation. Plastinated specimens can be unique material for teaching and can play a key role in solving our problem of cadaver shortage.  

Introduction: People’s facial appearance can play an important role in their social success. On the other hand, facial appearance-related problems have an important effect on an individual’s quality of life. The aim of this research was to determine the relationship between dentofacial malformations and self-esteem and Self-Concept among male and female students of Isfahan Universities.Materials and Methods: In this cross-sectional research, 159 students, 18-25 years of age, were randomly selected from Isfahan Universities. The subjects consisted of 84 male and 75 female students, selected using easy sampling method. The subjects filled two Rosenberg self-esteem and Rogers Self-Concept questionnaires (A: the real self; B: the ideal self) and were examined in relation to dentofacial deformities. Data was recorded in two groups of dentofacial deformity and free of dentofacial deformity. T-test, ANOVA and Pearson’s correlation coefficient were used for data analysis (a=0.05).Results: The results did not show any relationship between self-esteem (p value=0.342), selfconcept A (p value=0.581) and Self-Concept B (p value=0.720) in the two groups. There was no relationship between deformity type and self-esteem (p value=0.71), Self-Concept A (p value=0.49) and Self-Concept B (p value=0.337). In addition, there was no relationship between sex and selfesteem (p value=0.237), Self-Concept A (p value=0.416) and Self-Concept B (p value=0.081). However, there was a direct relationship between self-esteem and Self-Concept A (r=-0.31).Conclusion: Under the limitations of this research, there was no relationship between dentofacial deformities and self-esteem and Self-Concept.