On the statistical analysis of Feigenbaum constants     

Fatin Sezgin 《Journal of The Franklin Institute》2006,343(7):756-758

We present statistical analysis of blocks in the binary expansions of Feigenbaum constants α and δ for the logistic map. The analysis is carried out on both 1016 and 3400 bit expansions. A χ² test is applied for lumping data and a serial test is applied on gliding data. Contrary to a previous research by Karamanos and Kotsireas, our test results did not indicate any evidence to reject randomness of these constants. Additional 25 randomness tests also support the conjecture of randomness of these constants having transcendental character.  相似文献   

Examining the relationship between teacher organizational commitment and school health in Turkish primary schools     

Ferudun Sezgin 《Educational Research and Evaluation》2013,19(2):185-201

The purpose of this study was to examine the relationships between teachers' perceptions of organizational commitment and school health in Turkish primary schools. The Organizational Commitment Scale and the Organizational Health Inventory were used to gather data from 323 randomly selected teachers employed in 20 primary schools in Ankara. Results indicated that teacher compliance commitment was negatively related to both identification and internalization. Three dimensions of school health, institutional integrity, principal professional leadership, and morale, negatively predicted teacher commitment based on compliance. However, teacher internalization commitment was positively predicted by these 3 health dimensions. Professional leadership was the only school health dimension that was significant in predicting identification commitment. Two other dimensions of school health, academic emphasis and resource support, were not significant predictors of the commitment factors. Results of the study are discussed in relation to developing the organizational health of schools and improving the organizational commitment of teachers.  相似文献   

Biomechanical analysis of the snatch technique in junior elite female weightlifters     

Sezgin Korkmaz 《Journal of sports sciences》2016,34(11):1088-1093

The strength and technical competence of junior female lifters play a decisive role not only for their current but also adulthood performance. The objective of this study was to investigate the three-dimensional kinematics of the snatch technique in junior female weightlifters. Ten elite junior female weightlifters participated in the study. Two cameras operating at 50 fields per second were used to record the lifts. The heaviest successful lifts were selected for the kinematic analysis. The kinematical data were obtained using a motion analysis system. The duration of the first pull was significantly longer than that of the other phases (P < 0.05). Maximum extension angle and velocity of the lower limb joints were significantly greater in the second pull (P < 0.05). The greatest extension angle was found in the knee joint during the first pull, while the greatest extension angle was observed in the hip joint during the second pull (P < 0.05). Maximum extension velocity of the knee and hip joints was significantly greater than that of the ankle in both phases (P < 0.05). In addition, the vertical velocity of the barbell and the absolute and relative power outputs was significantly higher in the second pull than in the first pull (P < 0.05). In the snatch lifting of junior female weightlifters, the angular kinematics of lower limb joints, the linear kinematics and trajectory of the barbell and other energy characteristics are similar to and consistent with the values reported in literature for adult female weightlifters.  相似文献