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김용재,노석규,서국웅 釜山大學校 附設 體育科學硏究所 1998 體育科學硏究所 論文集 Vol.14 No.-
Korean avoid living area on beach side because forigin enermy came in and disturb us historically. We are need marine leisure center. If we close frindship of marina leisure sports and take a pleasure. What was located condition for marine center. 1. Convenient traffic of metropolis which was scenery. 2. Far from commercial port for sailing. 3. Beautiful nature a background. 4. Calm sea and climate. 5. Meteorological observatory and sailing signal equipment. Safety was follow a rule, sailing lane, information of sea condition. Most of all was keep personal safety mind and self responsibility. All drive boat should be take drive licence. This drive licence system was not setting in our contury until now. We emphasis strongly this driving licence system that was control by authorization. Marine leisure sports was a good section for training a mind of human brave. And so we try setting marine civilization and culture for comfortable leisure sports.
서국웅,윤양진,서국은,이중숙,김용재,이언석,이훈식 釜山大學校 附設 體育科學硏究所 1992 體育科學硏究所 論文集 Vol.8 No.-
The purpose of this study was to analyze walking steps to prevent unnecessary energy consuming and prevention of injury from sliding when someone was walking. The questionnaire, high speed video system, E.M.G. system, and force platform system were used to analyze sliding mechanism in biomechanical perspective. Several results were found as following: 1. According to questionnaire regarding sliding, 93.3% of participants have sliding experiences. People have sliding experiences by greasy floor(48.4%) and obstacle (22.5%). Sliding types were found from different kinds of shoes such as sneakers (48.8%) and boots (34.2%). The results were presented as following 44.6% of participants were fall down front direction and 40.3% of people fell down rear side. 2. According to the high speed video system analyzer, step sliding increased with increasing step speed from distance and acceleration speed experiment with 80 steps/min, 100 steps/min, 120 steps/min. Also, the most sliding were occurred with sneakers, boots, and bare feet as order. 3. According to E.M.G. test results, the vastus lateralis M., the vastus medialis m., and the tibialis anterior m. of electric action potential presented strongly when participants fell front, rear, and right side. The vastus lateralis m. and the tibialis anterior m. of electric action potential presented strongly when someone fell left side, but the vastus medialis m. and the gastrocnemius m. of electirc action potential presented as weaker. 4. According to the force platform test results, the most big change of floor antipower of x-axis presented when someone fell the left side. The most of big change of floor antipower of y-axis presented when someone fell down rear side. The most of big change of floor antipower of z-axis presented similarly when someone fell the front, rear, left, and right side.
3차원 분석법의 적용 : DLT 방식 DLT(Dircet Linear Transformation) Method
서국웅,윤양진,김용재,이훈식 釜山大學校 附設 體育科學硏究所 1995 體育科學硏究所 論文集 Vol.11 No.-
The purpose of this study was to maximize the application of 3-d cine-photogrammetry, in which the DLT(Direct Linear Transformation) technique is used, by searching for some practical methods of application, and to develop a comprehensive package of programs of 3-d analyses. The raw digitized coordinate date were processed by a personal computer with the developed package. Two kinds of control-point-frame(pyramid, range pole), and a synchro-timer were designed and utilized in the study. Two theodolites were used of the angle measurements of the control points. The conclusions are as follows 1. Range pole system was much superior to control point pyramid system in the applicability of the control point frame. There was no significant difference between the calculated average length using the range pole system and the actual length of the rotation rod. 2. The automatic numerical aligning technique for the digitizing apparatus reduced the RMS of residuals of the control point space coodinates. But the optional distortion was not corrected by the correction model. 3. The application of the synchro-timer which was designed and used for the study was proved. But the standard deviation of the time interval between adjacent frames was affected by the quality of the image. 4. As a result of adopting unique of calculations of the control point space coordinates, the ratio of the power of the control point reconstruction to the size of the control point frame was reduced greatly
성장기 아동에서의 경추의 화골형태와 두개안면부 성장변화에 관한 연구
한국재,이상호 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2
The purpose of this study was to investigate the growth patterns of craniofacial areas in association with ossification events of cervical in growing children. The subjects used in this study were 476 children, ranging from 8 to 16 years of age, with good health, none of them recieved orthodontic treatment. Cephalometric radiographs were used to evaluate the growth patterns of the craniofacial area and the cervical vertebrae, and their relationships. Data was analyzed by SAS statistical program on computer. The results were as follows. 1. The chronologic age at peak height velocity(PHV) was 13-14 years in male and 12-13 years in female and it’s timing was synchronous with Cervical Vertebral Stage(CVS) 3-4. 2. The increased measurements in accordance with skeletal maturation of vertebrae were anterior cranial base length, posterior cranial base length, ramus height, mandibular body length, anterior facial height, posterior facial height, facial length, facial depth, SNA, SNB, and facial plane angle. In contrast, The decreased measurements were gonial angle, and mandibular plane(SN)Go Gn) 3. There was a close correlation between the linear growth of the craniofacial area and skeletal maturity of the cervical vertebrae but the angular measurements and the denture pattern showed a low correlation with the skeletal maturation of the cervical vertebrae. 4. The growth rate of the cranial area was even but that of the mandibular area was in peak synchronous with pubertal growth spurt of cervical vertebrae. 5. The timing of each skeletal stage of the cervical vertebrae forward in girls than of in boys but the linear measurements of the craniofacial area were larger in boys than those of in girls at each stage of skeletal maturity of the cervical vertebrae.