http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조원철(Wonchul Cho),이수홍(Soohong Lee) (사)한국CDE학회 2011 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2011 No.1
To design a complete car, there must be a close collaboration between car manufacturing company and part suppliers. While they are communicating through the virtual meeting environment, sharing 3D Model is essential to deliver their design purposes clearly. In this study, we covered how meeting participants can share 3D Model effectively and fast. And the view point sharing strategy is suggested for light data transferring reason. With those modules, we are making virtual meeting environment with a collaborative engineering design scheme.
조원철(WON CHUL CHO) 한국해양공학회 2004 韓國海洋工學會誌 Vol.18 No.6
Floating breakwaters have been recently studied to reduce the transmission ratio of wave energy. The numerical study shows how wave pressure and stress act on the rectangular floating breakwater under various regular wave conditions. In order to evaluate hydrodynamic pressure on the floating breakwater, the infinite element is applied to the linear wave diffraction and radiation problems. SAP2000, a structural analysis program, is used to evaluate stress on the floating breakwater.
조원철(Won Chul Cho),이인수(In Soo Lee) 한국정보기술학회 2015 Proceedings of KIIT Conference Vol.2015 No.6
본 논문에서는 마이크로파 도플러 모듈을 이용하여 움직이는 물체의 비거리를 비교적 정확히 측정할 수 있는 시스템을 구현하고자 한다. 골프공을 친 후 혼 안테나에서 발생하는 전자파의 송신주파수와 비행을 시작하는 골프공 표면에서 반사되어 되돌아오는 전자파의 수신주파수를 비교하여 도플러 주파수를 발생시킨다. 도플러 주파수는 증폭기를 통과하여 F/V변환기에 의해 DC전압으로 전환되고, DC전압은 디지털 신호 처리부인 A/D변환기를 통해 마이크로컨트롤러에 입력된다. 사용자가 선택한 골프채의 로프트 각도 등의 데이터를 실험을 통하여 구한 비거리 공식에 대입하여 골프공의 비거리를 구한다. 그리고 이를 세븐 세그먼트에 디스플레이 하여 골퍼가 볼 수 있도록 한다. 본 연구에서 개발한 시스템은 비교적 실측거리를 잘 따라가고 있음을 실험을 통하여 확인하였다. This paper provides that the system is calculated the estimated carry distance of a moving object using a microwave doppler sensor. The golfer uses a keypad to enter the golf club and the units of measure for the output display. A doppler radar module is employed to illuminate the golf ball. A reflected return signal is detected and difference pulses are generated, having a frequency which is proportional to the velocity of a ball. The difference pulses are transformed into DC voltage by a F/V converter. The DC voltage is transferred to the microcontroller by A/D converter. The carry distance can be displayed on the device, on a remote display, and/or can be stored in memory for later recall or transmission to an external computer. The experimental results show that the proposed system is quite track to the real distance.
조원철(Cho, Won Chul) 한국해안해양공학회 2004 한국해안해양공학회 논문집 Vol.16 No.4
본 연구에서는 폭이 좁은 1열 및 다열 잠제 대한 파랑 차단 성능을 폭이 넓은 1열 및 2열 잠제의 파랑 차단 성능과 비교·연구하였다. 파동장은 선형포텐셜 이론으로 모형화 하였으며 유한요소법을 적용하여 수치해석 하였다. 수치해석 결과, 1열 잠제에서는 폭이 좁은 잠제가 폭이 넓은 잠제보다 파랑 차단 성능이 다소 떨어지나 어느 정도 효과적인 파랑 차단 성능을 보여주고 있으며, 폭이 좁은 잠제를 2열 또는 3열로 배치하였을 때에는 폭이 넓은 1열 또는 2열 잠제보다 훨씬 뛰어난 파랑 차단 성능을 보이고 있다. The numerical analysis on the wave screening performance of the submerged breakwater with various crown widths is presented. The fluid motion is considered as linearized two dimensional potential flow and the finite element method is used to analyze the wave screening performance of the submerged breakwater. It is found that single-submerged breakwater with large crown width shows the most effective wave screening performance and single-submerged breakwater with small crown width also shows fairly good wave screening performance but its effectiveness is less than that of single-submerged breakwater with large crown width. However, double- or triple-submerged breakwater with small crown width shows more effective wave screening performance than that of single- or double-submerged breakwater with large crown width. It is expected that the submerged breakwater with small crown width is economical because it reduces the size of structure.
원위 대퇴골 골절의 보존적 치료 후 발생한 슬와동맥의 거대 가성동맥류 -증례 보고-
조원철 ( Won Chul Cho ),박종빈 ( Chong Bin Park ),최영준 ( Young Jun Choi ),이현일 ( Hyun Il Lee ),원희재 ( Hee Jae Won ),황재광 ( Jae Kwang Hwang ) 대한골절학회 2016 대한골절학회지 Vol.29 No.2
A pseudoaneurysm is a contained arterial disruption in the intimal and medial layers of an arterial wall. It may originate from a perforation caused by traumatic or iatrogenic injury or the dehiscence of a surgical anastomosis. Because of its insidious onset and delayed presentation, orthopaedic surgeons should be aware of the possibility of such a lesion after an initial trauma. We report on a case of a delayed huge pseudoaneurysm of the popliteal artery that occurred 11 months after conservative treatment of a supracondylar fracture of the femur in order to keep in mind the possibility of the delayed presentation of vascular injury after a distal femur fracture.