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폴리머 클립 혈관결찰기의 결찰부 구조 개선에 관한 연구
한성호,최복록 한국정밀공학회 2023 한국정밀공학회지 Vol.40 No.8
When laparoscopic surgery is performed, polymer clip blood vessel ligators are widely used to prevent bleeding and secure surgical vision. However, long-term use of such ligators can cause many structural problems, especially in the jaw part where the clip is mounted directly to the blood vessel. For example, jaws of the ligation device might be opened above the design value and upper and lower jaws might be twisted against each other. In addition, buckling or bending deformation can easily occur at the tip of the inner shaft. Due to these problems, the ligation machine cannot ligate the clip properly, which might lead to a medical accident. Therefore, in this study, the design was changed to improve these problems by increasing the pin diameter and contact surface, applying a double pin structure, and changing the structure of the shaft tip. As a result, the modified model showed 12.5% and 10.2% improvements in opening and twisting stiffness compared to the initial model with 7.2% and 58% improvements in critical buckling load and bending stiffness, respectively.
한성호,최성규,Han, Seong Ho,Choi, Sung Kyu 한국시스템엔지니어링학회 2009 시스템엔지니어링학술지 Vol.5 No.1
Korean Tilting trains have been tested on conventional lines since the beginning of 2007 for evaluating its reliability. We achieved some major performance tests which are the maximum operation speed, 180km/h test and the maximum curves increasing speed, over 30 percentage comparing with non-tilling operation train. In order to analysis reliability data of tilting train, we have used the special system engineering frame with interfacing between component suppliers effectively. And also we have developed the data aquisition system which consists of monitor, sensors and depot computer etc. As a results of calculation, until now we realized that the reliability are getting more increasing than starting point of running field test.
한성호,김범수,Han, Seong-Ho,Kim, Beom-Su 대한인간공학회 1999 大韓人間工學會誌 Vol.18 No.3
As speech is the human being's most natural communication medium, using it gives many advantages. Currently, most user interfaces of a computer are using a mouse/keyboard type but the interface using speech recognition is expected to replace them or at least be used as a tool for supporting it. Despite the advantages, the speech recognition interface is not that popular because of technical difficulties such as recognition accuracy and slow response time to name a few. Nevertheless, it is important to optimize the human-computer system performance by improving the usability. This paper presents a set of guidelines for designing speech recognition interfaces and provides a method for evaluating the usability. A total of 113 guidelines are suggested to improve the usability of speech-recognition interfaces. The evaluation method consists of four major procedures: user interface evaluation; function evaluation; vocabulary estimation; and recognition speed/accuracy evaluation. Each procedure is described along with proper techniques for efficient evaluation.
관혈적 방법과 관절경적 방법을 이용한 재발성 견관절 전방 불안정의 치료 결과
한성호,양보규,이승림,정선욱,이동호,오세진,이철호,하권익,Hahn Sung-Ho,Yang Bo-Kyu,Yi Seung-Rim,Chung Shun-Wook,Lee Dong-Ho,Oh Se-Jin,Lee Chul-Ho,Ha Kwon-Ick 대한정형외과스포츠의학회 2002 대한정형외과스포츠의학회지 Vol.1 No.2
목적: 관혈적방법과관절경적방법을이용하여재발성견관절전방불안정환자를수술후추시결과를비교하고자하였다. 대상및방법: 1995년1월부터2000년4월까지관혈적및관절경적Bankart repair를시행하고1년이상추시가가능한68명을대상으로하였으며, 23명은관절경적방법으로45명은관혈적방법으로수술을시행하였다. 추시기간은12개월에서64개월로평균34개월이었다. 결과: 관혈적수술을시행한환자들중2예에서아탈구가발생하여보존적인방법으로치료하였으며관절경적그룹에서는2예에서탈구, 2예에서아탈구가발생하여이중탈구된1예에서관혈적방법으로재수술을시행하였다. Rowe 등에의한기능적평가에서는관혈적그룹에서평균87 점이었고관절경적그룹에서평균85점이었다. 환자의주관적인만족도는관혈적그룹에서84.6 점이었고관절경적그룹에서72.5점이었다. 두그룹간의결과의통계분석상안정성과운동범위점수이외에는통계학적으로유의한차이는없었다.결론: 관혈적수술방법은안정도가높았고, 관절경적수술방법은견관절운동범위에장점이있었다. 견관절재발성전방불안정환자의수술적치료에있어서이학적검사및방사선학적검사, 진단적관절경에의해적절한수술방법을선택하는것이환자의예후에중요한요소가될 것이다. Purpose: To compare the results of open and arthroscopic method in recurrent anterior should erinstability. Materials and Methods: The 68 patients who have been taken the open or arthroscopic Bankartrepair for the period of Jan. 1995 to April. 2000. One group (23 patients) had elected an arthroscopic Bankart repair, the other group (45 patients) had chosen open stabilization. Patients were followed up12 to 63 months (ave. 34 months) after surgery. Results: We found 2 cases of subluxation out of open repair group, and then treated by conservative method. There were another 2 cases of dislocation and 2 cases of subluxation out of arthroscopicrepair group, and we have taken out 1 case of reoperation by open method. Using the functional scales by Rowe, the patients who have taken the open method posted at the average point of 87, while the arthroscopic method posted 85 points. Patients satisfaction points were 84.6 and 72.5 respectively. There were no criteria of statistically significant except stability and motion score. Conclusion: Open Bankart repair would be better in stability, and arthroscopic method in ROM gain. Proper patient selection based on physical examination and arthroscopic inspection to optimize the indications contributed to successful treatment.
박스형 보강효과를 고려한 개선된 PSC Beam교의 구조 안전성 평가에 관한 연구
한성호,신재철,방명석 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 논문집 Vol.11 No.5
노후화된 PSC Beam 교량은 개선된 보강방안이 필요하다. 본 연구에서는 성능저하가 발생된 노후 PSC Beam 교량을 대상으로 PSC Beam 교량의 보강형을 폐단면 박스형태로 변환하여 이차합성 구조화함으로써, PSC Beam 교량의 강성을 안정적으로 증가시킬 수 있는 박스형 보강방안을 제안하였다. 제안된 보강방안과 기존의 외부프리스트레스 도입공법을 결합하여 보강할 경우, 보강효과를 정량적으로 규명하기 위해 시공단계해석에 따른 시간 의존적 정밀해석을 수행하였다. 성능개선을 위해 제안된 박스형 보강방안 적용 시 보강방법에 따라 전단면 및 휨 보강과 같은 다양한 형태의 보강방안을 제시한 후, 각각의 보강방안에 대해 이차합성 효과에 따른 상향캠버 및 부재응력 특성을 평가하였다. 또한 내하력 평가를 수행하여 내하율을 검토함으로서, 개선된 PSC Beam 교량의 구조 안전성을 정량적으로 평가하였다. The deteriorated PSC Beam bridge is necessary improved reinforcement method. In the study, it is proposed the box reinforcing method which could make the stiffness of the PSC Beam bridges increase more stably through the secondary composition effect of open type PSC Beam bridge's girder which is converted into the consolidation box type and the half panel is formed between the lower flange of the PSC Beam about the deteriorated PSC Beam bridge suffering the capacity decline. In case the proposed reinforcement method combine with the existed external prestressed method, the close analysis depending on the time is conducted by the construction stage because of searching the effect of reinforcement quantitatively. The reinforcement method of the box type which is proposed an efficiency improvement in objective in application case, by a reinforcement method after proposing the whole and bend sectional reinforcement method, against a each reinforcement method evaluated the upward camber which it follows in secondary composite effect and a member stress characteristics. Also, the structural safety of PSC Beam bridge is evaluated quantitatively by examining of rating factor through load carrying capacity evaluation.