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한혜원(Han, Hae-Won),원유미(Won, You-Mi),김근국(Kim, Geun-Kook) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.6
This study was aimed for investigating the walking participation of korean youth and identifying their subjective status according to walking participation. The data was extracted from the 2014 Korean Youth" health Behavior Web-based Survey and analyzed by complex sample design, frequency analysis, t-test with complex sample chi-square test and general linear model(p<.05) using SPSS ver.22. The results of the analysis can be summarized as the following. First, walking participation was higher on following factors in general characteristics.; male in gender, first and second year of both middle school and high school in grade, small and medium-sized cities in size of cities, middle school in school levels, Seoul and Kyung-ki in province. Second, youth who participate walking showed positive higher score on all factors of subjective status.
이원유,장지철,김형돈,한부석,Lee, Won You,Jang, Ji Cheul,Kim, Hyoung Don,Han, Bu Seuk 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.3
To study the possibility of attraction magnetic forces to expand maxillary arch, we used 2 big adult dogs, 2 small puppies, 1 small adult dog as experiments, and 1 small adult dog as a control. We measured the intercanine width and intermolar width and histologically observed in the suture and cervical and apex region of teeth and took occlusal X-rays to observe separation of suture line in the maxilla. The results were as follows: 1. Expansion velocities of intercanine (0.25mm/day) and intermolar widths (0.23mm/day) in puppies were faster than those (0.135mm/day, 0.09mm/day) in adults. 2. In all experiments in adults (0.135mm/day) and puppies (0.25mm/day), expansion velocity of intercanine widths were faster than those (0.09mm/day, 0.23mm/day) of intermolar width. 3. In all experiments ectatic changes were observed and cellularities of fibroblast increased in the suture line. Only in adults dogs the separations of palatal suture were observed in the occlusal X-ray view. 4. In the puppies bony deposition was particularly observed in the suture line and micro-bony fragments were often observed. 5. In the all experiments no root resorption was observed in the cervical and root area, but normal root resorption due to eruption of permanent teeth was observed in the puppies.