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오민석,원종식,정윤교 창원대학교 공작기계기술연구센터 1999 연구업적집 Vol.1 No.1
This paper investigates the feasibility of using acoustic emission signal analysis for the detection of built-up edge during machining. Experiments were conducted on a CNC-lathe using conventional carbide insert tools under various cutting conditions. The cutting forces were also measured for comparisons. Experimental evidence is presented which indicates that the presence of a built-up edge can significantly affect the generation of acoustic emission in metal cutting. It is shown that under conditions in which a built-up edge is generated, the variation of AErms signal with cutting speed can be quite different from the generally accepted linear, monotonic increase as previously reported. The feasibility of utilizing AErms in built-up edge sensing is suggested.
이승구,송석환,이주엽,문창윤,오재찬 대한골절학회 2003 대한골절학회지 Vol.16 No.2
목적 : 수부의 중수지 관절 탈구의 관혈적 정복이 필요했던 예에서는 정복을 방해하는 구조물에 대해 분석하고 도수 정복이 가능했던 예에서는 성별 및 탈구 형태에 따른 특성에 대해 알아보고자 하였다. 대상 및 방법 : 총 27예의 수부 중수지 관절 탁구 환자 (무지 11예, 이지 14예, 소지 2예)를 대상으로 연구하였다. 탈구된 중수지 관절의 정복을 방해하는 해부학적 구조는 수술시에 확인을 하였으며, 도수 정복이 가능하였던 예들에서도 연령과 손상된 구조물, 그리고 최종적인 임상 결과를 평균 7개월간 추시 관찰하였다. 결과 : 무지 중수지 관절의 탈구 11예 중 파열된 전방 관절낭, 수장판과 단무지 굴건의 파열을 동반한 복합 탈구가 8예 있어 관혈 정복을 시행하였으며, 2예에서만 도수 정복이 가능하였다. 관절염이 있던 1예는 관절 유합술을 시행하였다. 다른 수지의 중수지 관절의 탈구는 Kaplan의 개념에 따라 탈구를 수술 정복하였고 파열된 수장판을 복원하였으며, 1예에서 수술시 표재 중수 횡인대만의 절개와 이완으로 정복할 수 있었다. 소지 중수지 관절 탈구의 2예에서 파열된 요측 측부인대가 수술시 관찰되었고 이를 복원하여 수지의 불안정성을 예방하였다. 이들의 최종 결과는 특별한 운동 제한이나 불안정성 없이 좋은 결과를 보였다. 결론 : 적절한 국소 마취하에 도수 정복을 1~2회 시행할 수 있지만 단순 정복이 가능한 탈구가 부적절한 견인으로 정복이 불가능한 복합 탈구로 진행할 수 있다. 그리고 복합 탈구는 대부분 관혈적 정복이 필요하기 때문에, 정복 방해 구조물에 대한 충분한 이해와 적절한 조치가 필요하다. Purpose : To analyse the obstacles to prevent the reduction for dislocation of the metacarpophalangeal (MP) joints of the hand and evaluate the relationship between the sex and dislocation type in closed reduction case. Materials and Methods : Total 27 cases of MP joint dislocation of the hand (11 cases of thumb, and 14 index and 2 little finger) were reviewed retrospectively. The anatomical structures to prevent the reduction were confirmed at operation and the cases which were reduced immediately were also analysed for their ages and differences of damaged structures, and finally their complications or outcome were reviewed for average 7 months after reduction. Results : In 11 cases of thumb MP joint dislocations, the complex dorsal dislocations in which the protruded metacarpal neck was caught by buttonhole of torn anterior joint capsule, volar plate and FPB were reduced by open method in 8 cases, and closed reduction was done in 2 cases but one old case required arthrodesis. In other finger MP joint dislocations, the Kaplan's concept to prevent the reduction was confirmed. But reduction of torn volar plate and incision of transverse metacarpal ligament were sufficient to reduce the dislocation with gentle longitudinal traction during the operation. In two cases of little finger MP joint dislocation, the ruptured radial collateral ligaments were noted after open reduction and it must the repaired to prevent the finger instability later. Their overall end results were good without any significant restriction of MP joints motions and finger instabilities. Conclusion : One or two times of closed reduction with proper local anesthesia could be tried, but simple reducible dislocation can be converted to complex irreducible ones by the inappropriate traction method, and so proper reduction technique by closed or even in open way is important with the knowledge of anatomical obstacles to prevent the reduction of the metacarpophalangeal joints.
Youn Jung Oh,Jae-Young Choi,Jong-Oh Lim,Kwan-Ho Sim,Seok-Hee Hong,이명모 물리치료재활과학회 2023 Physical therapy rehabilitation science Vol.12 No.4
Objective: The purpose of this study was to investigate the effects of an exercise program using a gym ball and sling on posturalalignment, shoulder level, pulmonary and respiratory muscle pressure in adults aged 20 years and older. Design: Randomized controlled trialMethods: A total of 32 adults aged 20 years and older participated in the study. Participants were selected through a randomizationprogram and assigned to a gym ball exercise group (n=16) and a sling exercise group(n=18). Each group performed an exerciseprogram using either a gym ball or a sling. All interventions were performed 3 times a week, for a total of 3 weeks. To compareeffects, we measured craniovertebral angle(CVA), cranial rotation angle(CRA), shoulder level, forced vital capacity(FVC),maximum voluntary ventilation(MVV), maximum inspiratory pressure(MIP), and maximum expiratory pressure(MEP) beforeand after the intervention. Results: Both groups had no significant differences in CVA, CRA, and shoulder level at pre-test, and both groups showedsignificant changes from pre- to post-intervention(p<0.05). In the gym ball exercise group, there was a significant change in FVC,MVV, MIP, and MEP, except for MIP, between pre- and post-intervention(p<0.05). In the sling exercise group, there were significant changes in MVV, MIP, and MEP, except FVC, between pre- and post-intervention(p<0.05). Conclusions: An exercise program using a sling and a gym ball is an effective intervention with clinically significant effects inimproving postural alignment and pulmonary
호텔기업의 전략적 인적자원관리가 조직 내재화 및 조직 몰입에 미치는 영향
오석윤 ( Oh Seok-youn ) 한국호텔리조트학회(구 한국호텔리조트카지노산학학회) 2020 호텔리조트연구 Vol.19 No.1
The purpose of this study was to examine the impact of strategic human resource management in hotel organization and hotel employees’ organizational internalization and organizational commitment. In order to achieve the purpose of this study, the study was conducted by establishing a hypothesis through precedent studies and verifying the hypothesis through empirical testing. Survey data were collected form 350 hotel employees. In order to analyze the proposed constructs, factor analysis and regression analysis is required for this research. The results of factor analysis reveal that, five factors of the perception of the communication were derived such as wages and welfare, employee involvement and communication, education and training, career management, and evaluation management. Research findings are summarized as follows. First, employee involvement and communication, education and training, career management, and evaluation management had positive effects on organizational internalization. Second, it was found that evaluation management had positive effects on organizational commitment. Also, it was found that the hotel employees that recognized themselves to have a organizational internalization had a higher level of organizational commitment.