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장경호,이용재,김광표,안병덕 ( KYung Ho Chang,Yong jae lee,kwang Pyo kim,Byung Duk Ahn ) 한국센서학회 1995 센서학회지 Vol.4 No.3
For the development of liquid density measuring sensor using the natural frequency of a pipe, its principle and construction method were described. The stainless steel pipe, which has length of 3 cm, inside diameter of 2.3 cm and outside diameter of 2.5 cm, was used for the sensor. The exciting coil and the photo sensor were used to excite and to pick-up it, and the feedback circuit was designed to continue its vibrating. The natural frequency was consistent with the result of the spectrum analysis. It had a linearity of 0.0027 % and a sensitivity of 0.032 in liquid density range from 0.8 g/㎤ to 1.4 g/㎤ and its frequency variation ratio was 0.024 %/℃ in temperature range from 10℃ to 35℃.
학급내에서 소외를 당하는 학습장애학생의 이미지 변화를 위한 친구교육프로그램의 효과
장경호(Kyung Ho Chang),박형섭(Hyung Seop Park) 한국발육발달학회 1998 한국발육발달학회지 Vol.6 No.1
This study was conducted to promote a LD(Learning Disabilities) student`s positive classroom behaviors. A peer-teaching program that includes training basic skills and activity reinforcements was constructed. The basic skills were sliding and jumping, while the activity reinforcers include a pizza party, participation in a concert, and skateboard demonstration. The transdisciplinary-team model and the peer-teaching method were applied. The subject`s classroom behaviors were evaluated by 40 classroom mates. Effects of the skateboard program were investigated by pre-post test method. To evaluate the subject`s behavior, a behavioral checklist was developed with validity and reliability test. Results of this study indicates that the subjects` classroom behavior were significantly changed after complete of the skateboard program. However, the subject`s personality characteristics were not changed. Scores of the subject`s classroom behavior that was evaluated by male students was greater than that of female students(p$lt;0.05). The different results by the gender was considered to that the male students more likes the skateboard thant the female students. This study also emphasized that promoting useful classroom behaviors, rather than negative one such as aggressiveness, screeming, and roughing, is important to protect increasing negative images.
경직성 뇌성마비아동의 반사적 움직임 감소를 위한 신체정렬기법의 효과
장경호(Kyung Ho Chang),정유진(Yu Jin Jung) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.44
Children with spasticity cerebral palsy were participated in an Ideokinesiology program to decrease oe control primitive reflexes such as ATNR, Moro reflex, and Righting reflex. An experimental research with 12 subjects in experimental group and 18 subjects involved in a control group were conducted for 10 weeks. Using the QUEST and the BOTMP, subjects` mobility of upper extremity includes hands, neck, arms, and upper body were measured. Results was indicated that subjects` reflexes with hands, neck, and upper body were significantly decreased. However, reflexes with arms were not changed. The Ideokinesiology with image of body parts was an effective methodology to control impropriate mobilities for primitive reflexes of child with cerebral palsy.
스쿠버다이빙 초보자의 부력조절기 사용에 따른 공기사용량과 실패횟수 분석
장경호(Kyung Ho Chang),유진상(Jin Sang Yoo),오문엽(Moon Yeop Oh),설정덕(Jeong Dug Sul) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.46
This is an experimental research to verify a buoyancy compensator`s rolls for a beginner of scuba-diving. Subjects of this study is 66 adults who are participated in the summer camp for the Leisure Sports Events of 2010 Summer(Leports 2010). the 33 subjects are involved in the comp arative group, while the other 33 subjects are in the experimental group. The volume of air consuming was measured at the point of decent, underwater swimming, and ascent to the surface of water. Results of the study indicates as following: Firstly, the non-using buoyancy group uses more air at the point of decent to compare that of the using buoyancy group, that indicates more probabilities of diving related injuries such as sinus squeeze, carotid sinus reflex, breathing resistance, or barotrauma of ear can be developed. Secondly, the non-using buoyancy group uses less air during the underwater swimming from the point of decent to the point of ascent. However, there are many chance of unwished ascent with the non-using buoyancy group. Thirdly, the relationship with a partial correlation between the number of mistake and the submerging at the decent area was significant, that indicates more chances of accidents may happen at the beginning of diving for the novice diver. Discussions regarding that the instructor should teach and request using a buoyancy compensator to the beginner to prevent unexpected accidents are provided.