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이수형(Soo-Hyoung Lee),최용범(Yong-Bum Choi),박원조(Won-Jo Park),허선철(Sun-Chul Huh),윤한기(Han-Ki Yoon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
The objective of this study is to investigate fatigue life and fatigue crack propagation behavior. The experiment of fatigue life for MMC have been carried out for the stress ratio R=O.I at 20Hz. Fatigue life limit of AC4CH alloy is about 70 MPa and Fatigue limit of MMC bas been increment to 120 MPa, that is about 71 % higher, than fatigue limit of AC4CH alloy. Crack propagation tests ,on half-size cT specimen of thickness 12.5mm were conducted by using sinusoidal 'waveform. The crack length was monitored by compliance method. Test conditions were at 0.1 and 0.05 of load ratio at 10Hz of loading, frequency and test load was 2.3kN. The effects of stress' ratio on, the fatigue crack propagation behavior for MMC was discussed within the Paris law. As the' results of this study,<br/> Fa~ue crack propagation in~d with increasing the load ratio.
Severe MCA Stenosis로 인한 TIA 환자 1례
윤창준,김종화,이수길,Yoon, Chang-Joon,Kim, Jong-Hwa,Lee, Soo-Gil 대한중풍순환신경학회 2008 대한중풍.순환신경학회지 Vol.9 No.1
Transient Ischemic Attack(TIA) is an important risk factor of stroke but often underestimated by clinicians. In this case, we administered oriental-western cooperative therapy to a 72 years old female TIA patient with severe MCA stenosis. After treatment, all symptoms were disappeared and has not reappeared until 1 year follow-up.
이수인,윤진상,이형영,Lee, Soo-In,Yoon, Jin-Sang,Lee, Hyung-Young 대한수면의학회 1997 수면·정신생리 Vol.4 No.2
본 연구는 수술전일 수면제 필요군의 특성을 파악하고 수면제의 필요성에 기여하는 변인들의 상대적인 중요성을 알아보고자 하였다. 연구자는 수술이 예정된 환자들의 병록지를 검토한 후 반구조적 면담을 시행하였다. 또한 환자에게는 불안, 우울, 통증의 정도를 측정하는 자가평가 질문지와 수면 전 후 설문지를 작성토록 하였다. 설문지에 성실히 응답한 167 명의 환자를 수술당일 기상 후 지난 밤 수면제의 복용이 필요했다고 판단하는 환자군(수면제 필요군)과 필요하지 않았다고 판단한 군(수면제 불필요군)으로 분류한 다음, 양군간에 인구통계학적 특성, 임상적 특성, 수면에 영향을 줄 수 있는 가능한 인자, 심리적 특성, 수술전 주간 상태와 야간 수면 등을 비교하였다. 양군간에 유의한 차이를 보인 변인들에 대해서는 수면제 필요군을 특징짓는 변인들의 예측기여도를 측정하기 위해 판별분석을 하였다. 연구결과는 수면제 필요군과 불필요군 간에 인구통계학적 특성 및 임상적 특성은 차이가 없었다. 그러나 병실환경에 대한 만족도는 수면제 필요군에서 불필요군에 비해 낮았다. 심리적 특성에서 불안의 정도는 양군간에 차이가 없는 반면에, 우울과 통증의 정도는 수면제 필요군이 불필요군에 비해 더 심하였다. 수술전일의 야간 수면에서도 수면제 필요군이 취침 전 수면에 대한 기대가 더 부정적이었고, 실제로 다음날 아침 전일의 수면을 더 불량하게 평가하였다. 판별분석의 결과, '수면에 대한 기대도'와 '통증'이 수면제 필요성을 판별하는 중요한변인이었다. 이상의 결과로 수술전일의 불면을 개선하기 위한 수면제나 진통제의 투여는 치료자의 판단이나 다른 객관적인 지표보다는 수면제의 필요성에 대한 환자 자신의 주관적인 의견이 더 중시되어야 할 것이다. Objects : This study was carried out to investigate characteristics of patients who need hypnotics on the night before elective surgery as well as contributing variables for the necessity of hypnotics. Methods : After reviewing the clinical charts of patients who were scheduled to receive surgery by general anesthesia the following day, researchers had semi structural interviews with patients. In addition, Spielberger's State-Trait Anxiety Inventory(SSTAI), Beck Depression Inventory(BDI), Zung's Self-Rating Pain and Distress Scale(ZPDS), and Presleep and Postsleep Questionnaires were administered to patients. A total of 167 patients, who gave reliable information, were divided into two groups based on subjective judgement regarding the necessity for hypnotics on the night before surgery; 29 eligibles for hypnotics and 138 non-eligibles for hypnotics. Demographic and clinical characteristics of patients, some possible factors affecting sleep, psychological characteristics of patients and daytime status and nighttime sleep before surgery were compared between the two groups. In addition, discriminant function analysis was done to find the variables which would best discriminate among patients who differ in terms of necessity for hypnotics on the night before surgery. Results : There was no difference in demographic and clinical characteristics between the two groups; however, the satisfaction level with ward environment was significantly lower in the eligible group for hypnotics than the non-eligible group. Psychologically, the eligible group for hypnotics, compared to the non-eligible group, showed significantly more severe depression, pain, and distress; whereas anxiety level was not different between the two groups. For nighttime sleep before surgery, the eligible group for hypnotics, compared to the non-eligible group, expected poorer sleep before retiring and in fact, reported poorer sleep the following morning. In discriminant function analysis, 'expectation for sleep' and 'pain and distress' were the most potent contributors to discriminate the necessity of hypnotics. Conclusion : For the improvement of the patient's sleep on the night before elective surgery, giving hypnotics and/or analgesics should be determined by patient's opinion about the necessity of the drugs rather than by the therapist's own judgement or any other objective indices.
선천성 근성 사경증 환아에게 발생한 척추측만증 치험 1례
윤창준 ( Chang Joon Yoon ),임해원 ( Hae Won Lim ),이수길 ( Soo Gil Lee ) 한방재활의학과학회 2009 한방재활의학과학회지 Vol.19 No.4
Objectives: The purpose of this study is to report one case of spinal scoliosis patient with neglected congenital muscular torticollis treated by chuna manual therapy. Methods: The patient had been treated with chuna manual therapy. Full spine anteroposterior X-ray was taken to measure cobb`s angle and cervico-mandibular angle before and after the period of treatment. Results: After treatment, the cobb`s angle has been improved by 12°(31° to 19°) at thoracic level, by 7°(17° to 10°) at lumbar level. The cervico-mandibular angle has been improved by 5°(14° to 9°). Conclusions: Chuna manual therapy was effective for a scoliosis patient with neglected congenital muscular therapy.
류헌식,윤창준,박동수,이수길,Ryu, Heon-Sik,Yoon, Chang-Joon,Park, Dong-Soo,Lee, Soo-Keel 척추신경추나의학회 2007 척추신경추나의학회지 Vol.2 No.1
Objectives : This report is to investigate clinical effects of Chuna treatment on anterior translation of sternoclavicular joint. Methods : The female Patient, 50 years old, had anterior translation of sternoclavicular joint and the local pain. We treated the patient with Chuna treatment. In order to evaluate the improvement, Degrees of pain were measured with Visual Analogue Scale(VAS), and the change of anterior translation was assessed with anterior height of clavicle head. Results : After 3 weeks treatment, In VAS, Degrees of pain decreased 10 to 2. and Anterior height of clavicle head decreased 15mm to 5mm. Conclusions : Chuna treatment is effective on treating anterior translation of sternoclavicular joint and the local pain.
안석환(SEOK-HWAN AHN),이수식(SOO-SIG LEE),김진욱(JIN-WOOK KIM),윤자문(JA-MUN YOON),남기우(KI-WOO NAM) 한국해양공학회 2005 韓國海洋工學會誌 Vol.19 No.5
Fracture behavior and pipe strength are very important to the integrity of energy plants, ocean structures, and so forth. The pipes of energy plants and ocean structures are subject to local wall thinning, resulting from severe erosion-corrosion damage. Recently, the effects of local wall thinning on fracture strength and fracture behavior of piping systems have been the focus of many studies. In this paper, the elasto-plastic analysis is performed by FE code ANSYS on straight pipes with wall thinning. We evaluated the failure mode, fracture strength and fracture behavior, using FE analysis. Also, the effect of the axial strain on deformations and failure modes was estimated by FE analysis.