대퇴전자간 골절 정복에 있어 관상면상의 부정 정렬 평가 방법으로서 수술 중 Greater Trochanter Orthogonal Line의 유용성

윤용철 ( Young Cheol Yoon ),오종건 ( Jong Keon Oh ),손원용 ( Won Yong Shon ),김한주 ( Han Ju Kim ),조재우 ( Jae Woo Cho ) 대한골절학회 2016 대한골절학회지 Vol.29 No.1

목 적: 대퇴전자간 골절 수술 중 관상면상에서의 정복의 적정성을 쉽게 판단할 수 있는 평가 방법이 없는 상황이다. 이에 greater trochanter (GT) orthogonal line과 head center (HC) orthogonal line을 이용하여 정복의 내반, 외반 여부를 평가하는 지표로 사용 가능한지 알아보고자 한다. 대상 및 방법: 총 200예(남, 녀 각각 100예)의 standing orthoradiogram을 대상으로 picture archiving and communication system (Infinitt ver. 5.0.9.88)을 이용하여 분석하였다. GT orthogonal line과 HC orthogonal line을 측정하였다. 이 두 선 사이의 간격을 trochanter center distance (TCD)로 측정, 대퇴골의 neck shaft angle, medial proximal femoral angle with reference to anatomical axis (aMPFA), lateral proximal femoral angle with reference to mechanical axis (mLPFA)를 측정하여 이들과의 상관관계에 대해 분석하였다. 결 과: 모든 환자에서 GT orthogonal line이 대퇴골두 중심이나 대퇴골두 중심에서 조금 위로 지나갔고, TCD는 평균 7.22mm (범위, 0-17.57 mm)를 보였다. TCD는 aMPFA, mLPFA, neck shaft angle과 통계적으로 아주 유의한 상관관계를 보였다. 약 90%에서 GT orghogonal line이 대퇴골두 4분할 시 위에서부터 두 번째 분할 범위에 들어감을 확인하였다. 결 론: 전자간 골절 수술 시 GT orthogonal line은 대퇴골두 중심과의 관계를 고려하여 관상면상의 정복의 적정성을 평가하는 지표로 사용할 수 있다. Purpose: There is no consensus on a clear intraoperative guideline for judging the coronal plane alignment following reduction of trochanteric fractures. Complex angular measurements using fluoroscope monitors are tedious. Therefore the relation of the horizontal line from the tip of the greater trochanter (GT orthogonal) and femur head center (HC orthogonal) was studied to define this line as a criterion for predicting varus-valgus malalignment. Materials and Methods: We studied this relation in 200 standing orthoradiograms which included 100 males and 100 females. The images were digitally analyzed using the picture archiving and communication system. GT orthogonal line and HC orthogonal line were evaluated. The distance of these lines was measured as trochanter center distance (TCD) and its correlation with angular parameters like neck shaft angle, medial proximal femoral angle with reference to anatomical axis (aMPFA) and lateral proximal femoral angle with reference to mechanical axis (mLPFA) were analyzed. Results: In all patients, the GT orthogonal line passed either at or above the center of the head. Overall mean of TCD was 7.22 mm, ranging from 0 to 17.57 mm. TCD was found to show strong correlation with angular parameters like aMPFA, mLPFA and neck shaft angle. TCD was less than one fourth of the corresponding head diameter in around 90%. Therefore following reduction of trochanteric fractures, the GT orthogonal line should pass through the superior juxta central quadrant of the femoral head. Conclusion: This line can be represented by a guide wire with fluoroscopy during surgery. The GT orthogonal line can be used intraoperatively as a simplified tool for prediction of varus/valgus malalignment following the reduction of trochanteric fractures.

농촌마을정비시 농촌공간특성별 정비유형 분석

최영완 ( Young Wan Choi ),윤용철 ( Yong Cheol Yoon ),김영주 ( Young Joo Kim ) 한국농촌계획학회 2010 농촌계획 Vol.16 No.2

제3발표장 : 정보처리 및 복합기술 분야 ; 시설원예의 보온을 위한 에어로겔 보온커튼의 총괄열전달계수 분석

유영선 ( Ryou Young Sun ),강연구 ( Kang Youn Ku ),장재경 ( Jang Jae Kyung ),김영화 ( Kim Young Hwa ),강금춘 ( Kang Geum Chun ),이시영 ( Lee Si Young ),김현태 ( Kim Hyeon Tae ),윤용철 ( Yoon Yong Cheol ) 한국농업기계학회 2013 한국농업기계학회 학술발표논문집 Vol.18 No.1

어스앵커의 인발저항력 - 온실의 내풍성에 관한 연구 -

윤용철 ( Yoon Yong-cheol ),서원명 ( Suh Won-myung ),양영호 ( Yang Young-ho ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-

The uplift capacity and displacement of an earth anchor for improving the wind resistance of the 1-2W type plastic film pipe on greenhouse was tested using the steel circular vertical earth anchor with various diameters and embedded depths (L) in dry sand. The diameter (B) of the model anchor is 90mm, 120mm, 150mm, respectively. The model tests were performed embedded depth ratios (L/B) ranging from 1~3 in loose density. In the case of diameter 90mm, as the uplift loading increased, the uplift capacity also increased until the loading was reached to ultimate uplift capacity. After that, the uplift capacity was continually increased or decreased until the experiment was finished. In general, the ultimate uplift capacity was different depending upon the anchor diameter and embedded depth ratios.

온실설비 작동용 태양광발전시스템의 발전 성능 분석

윤용철(Yong Cheol Yoon),배용한(Yong Han Bae),유영선(Young Sun Ryou),이성현(Sung Hyoun Lee),서원명(Won Myung Suh) (사)한국생물환경조절학회 2009 생물환경조절학회지 Vol.18 No.3

본 연구는 온실 운영에 필요한 전력량을 확보함으로서 온실경영비 절감을 목적으로 우선 태양광발전시스템을 온실의 인접한 건물의 옥상에 설치하여 기상상태에 따른 발전량을 실험적으로 검토하였다. 연구결과를 요약하면 다음과 같다. 실험기간 동안 최고, 평균 및 최저온도는 각각 0.4~34.1, -6.1~22.2 및 14.1~16.7℃ 정도의 범위에 있었다. 그리고 일사량의 경우, 최대, 평균 및 최저값은 각각 28.8MJㆍm?², 14,9MJㆍm?² 및 0.6MJㆍm?² 정도였고, 전력은 일사량에 비례해서 증가하지 않고 약 750W 전후에서 거의 일정한 것을 알 수 있었다. 일일 최대, 평균 및 최소 소비전력량은 각각 약 5.2㎾h, 2.5㎾h 및 0㎾h 정도였다. 본 실험에 사용된 시스템의 평균 소비전력량을 기준으로 보면, 온풍기의 용량 및 작동시간이 작은 경우는 충분하지만 큰 경우는 부족한 것으로 나타났다. 온풍기의 용량이 큰 경우, 어레이 면적이 현재의 약 3배인 약 21㎡ 정도이면 평균 전력량으로 충분할 것으로 판단되었다. 물론 어레이의 온도가 높아지는 한 여름철에는 일사량에 비례해서 발생 전력이 증가하지 않은 것으로 나타났지만, 현재까지 실험결과로 보면, 두 인자 간에 상관계수가 0.84 정도로 상관관계가 높은 것으로 나타났다. For the purpose of reducing the cost for greenhouse operation by acquiring the electric power necessary for it, this study installed a solar photovoltaic system on the roof of the building adjacent to green-houses and experimentally examined the quantity of power generation based on weather conditions. The results of the study are as per the below: The maximum, average and minimum temperature while the experiment was conducted was 0.4~34.1, -6.1~22.2, and -14.1~16.7℃ respectively, and the solar radiation was 28.8MJㆍm?² (maximum), 14.9MJㆍm?² (average), and 0.6MJㆍm?² (minimum). The quantity of electric power didn't increase in proportion to the quantity of solar radiation and instead, it was almost consistent around 750W. Daily maximum, average and minimum consumption of electric power was 5.2㎾h, 2.5㎾h and 0㎾h respectively. Based on the average electric power consumption of the system used for this experiment, it was sufficient in case the capacity and the working time of a hot blast heater are small, but it was short in case they are big. In case the capacity of the hot blast heater is big, the average electric power quantity will be sufficient for array area 21㎡, about three times of the present area. In summer when the temperature of the array becomes high, the generation of electric power didn't increase in proportion to the quantity of solar radiation, but this experiment result shows a high correlation between two factors (coefficient of correlation 0.84).

온실단지내 폐영농자재의 처리에 관한 실태조사 (Ⅱ) - 진주, 김해지역을 중심으로 -

윤용철 ( Yong-cheol Yoon ),서원명 ( Won-myung Suh ),김영주 ( Young-ju Kim ),최만권 ( Man-gwon Choi ),배용한 ( Yong-han Bae ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-

The purpose of this study was to suggest effective management plans for farming material waste that is generated inside greenhouse complexes, and to review the management status of the farming material waste for farming facilities. The research results are summarized as follows. The farming waste that is generated in Korea has been treated the same as life waste, and the data for the waste is still being managed however, there was no information about the supply amounts which lowered the reliability. It was not easy to research the management status of the farming equipment supplied to the farms because they are purchased based on need however, it was determined that the system that can manage from the supply, collection, recycling, and treatment steps by using local agriculture association and agriculture technology management centers. Moreover, it was determined that the environmental friendly materials need to be further developed to recycle the farming materials. Especially, for the public dumps, not only financial support but also the support of the local residents is required. The farmer’s groups, villages or local governments can advertise and provide education for residents so they can be the guardians of their local environment.

딸기재배용 단동비닐하우스의 내재해성 검토

윤용철 ( Yoon Yong Cheol ),서원명 ( Suh Won Myung ),김영주 ( Kim Young Ju ),김태균 ( Kim Tae Kyun ),최만권 ( Choi Man Gwon ),이종원 ( Lee Jong Won ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-

This study was carried out to check the structural safety of greenhouses for the four typical types(A-1,A-2,B-1,B-2) based on structural analysis by comparing with both design wind velocity and design snow depth of 15 years recurrence interval. When analyzing structural behaviors under unit snow load and unit wind load, the deflections as well as such section forces as axial forces, shearing forces, and bending moments, shows similar trends regardless of the various greenhouse dimensions. Generally the maximum section forces were commonly found on the sides of windward; maximum axial forces and maximum shear forces were commonly found on each supporter; maximum bending moments were found near the eaves height. And when comparing the estimated potential wind and snow loads with those loads of 15 years recurrence interval, it was found that such modifications as increasing section modulus or narrowing pipe intervals of rafter are required against wind damage. The safe ranges of snow depth and wind velocity per the individual rafter pipe in the aspect of maximum tensile forces and maximum vertical compressions were found to be 11.9~17.4kg and 15.3~29.2kg respectively.

온실단지내 폐영농자재의 처리에 관한 실태조사

윤용철(Yong Cheol Yoon),서원명(Won Myung Suh),김영주(Young Ju Kim),최만권(Man Kwon Choi),배용한(Yong Han Bae) 한국생물환경조절학회 2008 한국생물환경조절학회 학술발표논문집 Vol.17 No.1

한국인에 대한 새로운 관절주위 잠김금속판의 해부학적 적합성: 사체를 이용한 연구

윤용철 ( Yong Cheol Yoon ),오종건 ( Jong Keon Oh ),김영우 ( Young Woo Kim ),김학준 ( Hak Jun Kim ),문홍주 ( Hong Joo Moon ),김남렬 ( Nam Ryeol Kim ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3

Purpose: This study was conducted to confirm the anatomic conformity of the new periarticular locking plates designed by Zimmer on Korean adult bones and to identify the structures at risk during the application of these implants. Methods: The study was performed on the humerus, radius, and tibia of 10 adult cadavers(6 males and 4 females) procured from the cadaveric lab of our hospital. Anteroposterior (AP) and lateral X-rays were taken to confirm that the cadavers were free of any unusual lesions or anatomic variations. We used the 3.5-mm proximal humerus plate, 2.7-mm distal radius plate, 3.5- and 5.0-mm proximal tibia plates, and 3.5-mm distal tibia plate developed by Zimmer, Inc. (Zimmer periarticular locking plate). The longest plate from each group was used to confirm anatomical conformity. Standard approaches were used for each area, and soft tissue was retracted in order to pass the plate beneath the muscle. The position of the plate was confirmed using standard AP and lateral view X-rays. After this procedure had been completed, the region was dissected along the length of the implant to determine the conformity of the implant to bone and the penetrations of screws into the articular surface or violations of any vital structures, such as nerves, blood vessels, or tendons. Results: Excellent anatomical conformity was observed with Zimmer periarticular locking plates for Korean adults. The tibial nerve and the posterior tibial artery were found to be structures at risk when applying a distal tibial plate. Conclusion: Additional posterolateral fixation is recommended when dealing with cases of tibial plateau fracture when the fracture line extends to the posterolateral cortex. We recommend taking proper views using 10~15 degrees of internal rotation to ensure correct screw length and, thus, avoid penetration of vital structures and tendons.

딸기재배 온실용 온습도 계측시스템의 성능개선

정영균(Young Kyun Jeong),이종구(Jong Goo Lee),안은기(Enu Ki Ahn),서재석(Jae Seok Seo),윤용철(Yong Cheol Yoon) (사)한국생물환경조절학회 2020 시설원예‧식물공장 Vol.29 No.2

본 연구는 기존에 사용하여 왔고, 최근에 온습도의 정확도를 검증하였던 강제 흡출식 복사선 차폐장치(Aspirated Radiation Shield; ARS)를 이용하여 모 기업(A 회사)에서 개발한 시스템의 성능을 개선하고, ARS 장치의 풍속이 온습도에 미치는 영향에 대해서도 시험적으로 검토하였다. 그 결과를 요약하면 다음과 같다. A 회사 제품의 시스템을 개선하기 전, A 회사 시스템의 온도는 ARS 장치로 측정한 온도보다 최대 10.2℃정도 높았고, 상대습도는 20.0%정도 낮게 나타났다. 시스템을 개선한 후, 노드 1, 2의 온도 및 상대습도는 거의 일치하는 것으로 나타났다. 개선 후의 노드 2와 ARS 장치로 측정한 온도간의 최고, 평균 및 최저온도를 포함한 온도편차는 각각 0.2~0.7℃정도로써 ARS 장치가 약간 낮거나 높게 나타나는 경향이 있었다. 상대습도의 경우, 일몰 직후 ARS 장치의 상대습도가 약 10.0%정도 높게 나타나는 경향이 있었지만, 그 이외에는 평균적으로 1.9%정도 ARS 장치가 약간 낮게 나타나는 경향이 있었다. 그리고 노드 1을 최소-중간 사이, 중간-최대 사이 및 최대로 설정한 경우, 노드 1, 2의 최고, 평균 및 최저온도를 포함한 편차는 각각 0.1~0.4℃, 0.0~0.2℃ 및 0.0~0.5℃정도였다. 그리고 노드 1의 3개 측점과 ARS 장치의 최고, 평균 및 최저온도를 포함한 편차는 각각 0.2~0.5℃, 0.1~2.2℃ 및 0.1~1.1℃정도의 범위로써 풍속의 크기에 따른 온도편차는 아주 미미한 것으로 나타났다. 또한 선행연구 및 본 연구의 결과를 종합하여 보면, 온도오차를 개선하기 위한 적정 풍속은 1.0~2.0m·s<SUP>-1</SUP> 정도의 범위일 것으로 판단되었다. This study investigates the improvement in the performance of a temperature and humidity measuring system developed by Company A using the Aspirated Radiation Shield (ARS). The shield has been used in the industry and its accuracy was verified recently. The study also experimentally examines the impact of the wind speed of the ARS device on temperature and humidity. The results are summarized as follows. Before the improvement of the system, the temperature of Company A"s system was up to 10.2°C higher than that measured by the ARS device, and the measured relative humidity was approximately 20.0% lower. After improving the system, the temperature and relative humidity of nodes 1 and 2 were found to be almost identical. The temperature deviations including the maximum, mean, and minimum temperatures between those measured in node 2 and by ARS were approximately 0.2 to 0.7°C, respectively; further, the values measured by ARS tended to be slightly lower or higher. In terms of relative humidity, the ARS measurements yielded values approximately 10.0% higher immediately after sunset; otherwise, the values were approximately 1.9% lower. Moreover, when node 1 was set to minimum-middle, middle-maximum, and maximum, the deviations including the maximum, mean, and minimum temperatures of nodes 1 and 2 were 0.1 to 0.4°C, 0.0 to 0.2°C, and 0.0 to 0.5°C, respectively. The deviations including the maximum, average, and minimum temperatures of the three points of node 1 and the ARS ranged from 0.2 to 0.5°C, 0.1 to 2.2°C, and 0.1 to 1.1°C, respectively, indicating that the temperature deviation according to the wind speed was negligible. In addition, considering the results of the previous study with those from this study, the optimal wind speed to improve the temperature deviation is considered to be in the range of 1.0~2.0 m·s<SUP>-1</SUP>