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토크컨버터 댐퍼 스프링의 강성 변화가 동적히스테리시스에 미치는 영향
윤영길,문윤배 한국기계기술학회 2015 한국기계기술학회지 Vol.17 No.1
The general auto transmission uses the torque converter that has a good vibration damping force by launching performance and damping effect as power transfer unit. The vehicle equipped with auto transmission uses Lock up clutch system to improve the fuel efficiency. The Lock up clutch system is the major factor of the devices that increase the torque from engine to transmission in specific condition and also consist of the damper springs to transfer the torque stably. Damper spring controls the vibration of power transfer units and improve the impression of riding and durability, by being damping function on change torque from engine. In addition, not only the appearance and performance, but also these sensitive qualities as like vibration and noise can also be main factor to buy a car. Recently, in order to absorb the low vibration caused by vehicle structure vibration, the Low-stiffness damper has been on the rise. The damper spring should be considered and designed, considering the engine characteristic and direct connect of lock up clutch due to the stiffness of the spring and hysteresis has a major effects to the damper characteristic. This study can be used for analyzing the major factors to effect the NVH characteristic by evaluating the damper’s hysteresis according to change of spring stiffness.
윤영길 한국스포츠심리학회 2004 한국스포츠심리학회지 Vol.15 No.1
스포츠심리학에서 비교문화 관점이 강조되던 흐름에 이어 최근 스포츠시장의 요구를 적극적으로 반영하려는 움직임이 일어나고 있다. 본 연구는 국내 프로축구단에서 스포츠심리학자으 역할 모형을 탐색하기 위한 목적으로 수행하였다. S프로축구단 선수, 지도자, 자원인력, 프런트 등의 구성원과 S구단의 공식 서포터즈인 H를 대상으로 6개월간 참여관찰, 면담, 설문조사를 진행하였다. 연구결과 스포츠심리학자는 프로축구단에서 상담과 트레이너, 교육자, 연구자, 동료, 중재자 등의 역할을 선수, 지도자, 지원인력, 프런트, 서포터즈 등을 대상으로 수행할 수 있다. 스포츠심리학자의 활동은 물리적 공간, 시간적 공간, cyber 공간, 매체 공간 등에서 이루어질 수 있다. 스포츠심리학자가 프로축구팀에서 역할을 수행하는데 비밀유지와 조율은 중요하다. 또한 스포츠심리학자 스스로 팀에 대한 자신의 공헌을 인정받으려는 기대를 하지 않는 것이 중요하다. After the trend of cross-cultural approach, it has been changing to represent actively the needs of sport market. This study was to explore role model of sport psychologist in professional football team. S professional football players, coaches, staffs, official supporter of S team were observed for 6 months. The results showed that sport psychologist plays various roles as a counsellor, trainer, instructor, researcher, peer, and mediator to players, coaches, staffs, ad supporters in Professional Football Club. Sport psychologists do their roles in physic, time, cyber, and communicating fields. It is very important that sport psychologists are confidential and flexible as doing their roles. In addition, sport psychologists should not expect recognition of their contribution in the team.
肥滿成人型糖尿病患者에서 體重 變動에 따른 糖負荷試驗成積에 關하여
尹榮佶 慶北大學校 醫科大學 1974 慶北醫大誌 Vol.15 No.2
Although the primary effect on glucose metabolism is not exactly known, the diet regulation remains a basis principle in therapeutic means of diabetes mellitus. Thirty obese diabetics were selected for study, who were newly-diagnosed of had been untreated for several years, having no other disease which might affect carbohydrate metabolism except obesity. Standard glucose tolerance tests were performed before and after weight reduction by diet regultion and adequate exercise. The following results were obtained. 1. Among 30 patients who had kept diet regulation with adequate exercise done for the maximum period of 6 monthes. weight reduction could be achieved in 22 patients. 2. Out of these 22 patients whose body weight have reduced satisfactorily, the glucose tolerance tests become normal in 15 cases, improved in 4 cases, and not improved in the remaining 3 cases. 3. On the other hand, among 8 patients in whom weight reduction was failed in spite of diet regulation with apequate exercise, the glucose tolerance tests become improve in 3 cases, and not improved in 5 cases. 4. On the follow up studies done approximately 12 monthes later, 12 out of 17 patients who had initial therapeutic aid remained in their reduced body weight with nearly normal glucose tolerance. 5. In one patient who has failed to reduce body weight glucose tolerance appeared improved and remained so in the follow-up of 12 monthes.