다분절 경추 유합 및 내고정 수술결과

전우열,배장호,정병우,김성호,김오룡,최병연,조수호,Jeon, Woo-Youl,Bae, Jang-Ho,Jung, Byoung-Woo,Kim, Seong-Ho,Kim, Oh-Lyong,Choi, Byung-Yon,Cho, Soo-Ho 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.1

Objective : The purpose of the present study was to examine neurologic changes, fusion rate and degree of kyphosis from the surgical results of those patients who underwent multi-level anterior interbody fusion and internal fixation. Methods : Among 63 cases of the patients who received multi-level anterior interbody fusion and internal fixation in 5 years between 1995 to 1999 at the neurosurgery department, we performed a retrospective study in 52 cases that could be followed up with dynamic view imaging ; the results were compared and analyzed. The analysis was based on the results of history taking, physical findings and radiologic findings, and Odom criteria were used to classify those cases with neurologic changes. Results : Among those 52 cases in whom the follow-up was possible for at least a year and dynamic view imaging was possible, bone fusion was seen in 93% of the trauma cases and 95% in the non-trauma cases and overall bone fusion was observed in 94% of the cases. Bone fusion was seen in 93% of the autobone cases, 95% of the allobone cases, and 94% of the Mesh cases. Radiologic changes were observed by comparing the lateral view after surgery ; kyphosis was seen in 53% of the autobone cases, in 70% of the allobone cases, and in 35% of Mesh cases ; in 45% and 60% of the non-trauma cases and trauma cases, respectively ; and in 55% of the 2 level fusion cases and 46% of the 3 level fusion cases. Neurologic changes classified according to Odom criteria showed excellent result in 48% of all the cases, good in 23%, fair in 4%, and poor in 25%. Conclusion : Even those cases with multi-level fusion, a high fusion rate could be obtained by performing anterior interbody fusion and internal fixation ; those cases with kyphosis were related more with the presence or absence of posterior compartment injury rather than the fusion level ; and those trauma cases showed not much difference in the fusion rate compared with non-trauma cases but had a high possibility of kyphosis.

경접형골동으로 수술한 뇌하수체 선종의 치료성적

전우열,김오룡,김성호,배장호,최병연,조수호,Jeon, Woo-Youl,Kim, Oh-Lyong,Kim, Seong-Ho,Bae, Jang-Ho,Choi, Byung-Yon,Cho, Soo-Ho 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.11

Objective : Transsphenoidal approach(TSA) has been used as useful operative method for pituitary tumor but is still controversal in case of cavernous sinus invasion or severe suprasellar extension. This study was performed to evaluate the surgical result, recurrence, effect of adjuvant treatment, especially in cases of suprasellar extension or cavernous sinus invasion. Material and Methods : We studied 56 cases of surgically treated pituitary adenoma that we were able to follow up, treated by TSA from 1993 to 1998. There were 24 cases of suprasellar extension and 11 cases of cavernous sinus invasion. The medical records and radiological findings were reviewed. Surgical results including hormonal function and recurrence rates were analyzed according to extent of tumor invasion. Mean follow-up period was 19.1 months. Results : Tumors with suprasellar extension were removed totally in 54%, whereas total tumor removal was possible only in 38% with cavernous sinus invasion. Overall of recurrence rate was 14% and recurrence rate was 25% in suprasellar extension and 9% in cavernous sinus invasion. In cases of both suprasellar extension and cavernous sinus invasion, tumors that were treated by TSA and radiation showed recurrence rate of 7%, whereas those treated by surgery alone showed 28% of recurrence. Conclusion : Transsphenoidal approach is safe and useful operative method for pituitary adenoma and adjuvant therapy including radiation therapy is effective means to decrease the recurrence in cases of suprasellar extension or cavernous sinus invasion.

재해영향평가등의 협의 계약현황 분석

전우열(Jeon, Wooyeol),김민조(Kim, Minjo) 대한토목학회 2020 대한토목학회 학술대회 Vol.2020 No.10

방재분야 표준품셈 대비 재해영향평가등의 협의 대행업무 계약금액 비교 분석: 협의 대상 규모 및 협의 주체별 분류를 중심으로

전우열(Jeon,Wooyeol),장광진(Jang,Kwangjin) 한국방재학회 2021 한국방재학회논문집 Vol.21 No.1

본 연구는 재해영향평가등의 협의제도와 관련하여 표준품셈 대비 계약금액 현황을 비교⋅분석해보고;그 결과를 제도 개선을 위한 기초자료로 제공하는 것이 목적이다. 자료의 신뢰성을 확보한 총 640건을 대상으로 한 저가계약 비율은 협의대상 규모별로 재해영향성검토 76.2%;재해영향평가의 경우 100%;소규모재해영향평가는 86.7% 등 전체적으로 저가계약 비율이 70% 이상으로 나타났다. 특히 용역금액이 큰 재해영향평가가 재해영향성검토 또는 소규모재해영향평가에 비하여 저가로 계약되는 경향이 높은 것으로 나타났다. 협의 주체에 대해서는 지자체 협의 건에서 저가계약 비율이 높았으며;민간 발주 사업이 공공 발주 사업보다 저가로 계약되고 있음을 알 수 있었다. 본 연구를 통해 그간 드러나지 않았던 재해영향평가 대행 계약현황을 정량화된 수치를 통해 확인할 수 있었으며;분석결과를 토대로 인과지도 개발을 통해 저가계약의 근본 원인을 도출하였다. This study compares and analyzes the contract amount and Standard for Calculating Expenses (SCE) concerning the Disaster Impact Assessment System (DIAS) and provides the results as basic data for improving the system. The current status of low-cost contracts based on a contract price ratio of 70% or less compared to the standard cost was analyzed. A total of 640 cases with reliable data were examined. The result indicated that the ratio of low-cost contracts was more than 70% of the total: the ratio of low-cost contracts of DIR was 76.2%;DIA 100%;and SDIA 86.7%. In particular;DIA with a large project area tends to be contracted at a price lower than that of DIR or SDIA. Further;this study found that the ratio of low-cost contracts of local government was higher than that of the central government;and private ordering projects were contracted at a cost lower than that of public ordering projects. Moreover;it verified the current contract status of DIAS agency through quantitative figures;which heretofore has not been revealed. The analysis results were used as basic data for the development of causal loop diagram.

2축 솔라셀 센서모듈을 이용한 태양광 추적시스템의 설계 · 제작

전우열(U-Yeol Jeon),강민정(Min-Jung Gang),이승환(Seung-Hwan Lee),김힘찬(Him-Chan Kim),문동윤(Dong-Youn Moon),김희수(Hee-Su Kim),손민정(Min-Jung Son),이지은(Ji-Eun Lee),이주현(Ju-Hyun Lee),우혁재(Hyeok-Jae Woo),신규재(Kyoo-Jae Shin) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6

Solar tracking system has the asembly of remote servo control and remote monitoring. It is composed of solar illumination of the solar azimuth one solar cell sensor device for detecting a value and integrated control device including the integrated control panel for remote transmission by the wireless communication by the servo control and solar module assembly to follow the sun azimuth in response to the control signal. The proposed algorithm is verified through experimental results.

교량밀집 구간의 흐름특성과 하상변동 모의

조홍제(Cho Hong Je),전우열(Jeon Woo Yeol) 대한토목학회 2010 대한토목학회논문집 B Vol.30 No.6B

하천단면의 형상이 복잡하고 교량이나 보등과 같은 수리구조물이 짧은 구간에 연속해서 설치되어 있는 경우, 흐름특성이나 하상변동 양상에 대한 분석이 매우 중요하다. 울산광역시를 관통하는 태화강의 삼호교 부근 약 250 m 구간에는 3개의 교량이 설치되어 있고, 상 · 하류에 각 l개씩의 지천이 유입되고 있어 홍수시 수위변화와 세굴 등에 의한 단면 변화가 크게 나타난다. 그럼에도 불구하고 태화강이 삼호교(구)를 기준으로 국가하천과 지방하천으로 나뉘는 구간이라는 이유로 상 · 하류 구간을 1차원 모형을 통해 따로 구분하여 분석하고 있다. 본 연구에서는 1차원 HEC-RAS 모형과 2차원 SMS 모형의 RMA2 모형을 이용하여 교량밀집과 지천유입에 따른 흐름특성을 상 · 하류 연계하여 비교 · 분석하였으며, SMS 모형의 SED2D 모형을 이용하여 같은 구간에 대한 하상변동 양상을 분석하였다. 그 결과 연속된 3개 교량에 대한 HEC-RAS 모형과 RMA2 모형의 수위차는 0.87 m였고, SED2D 모형에 의한 하상변동 모의결과는 교각간격이 좁고 중간에 위치한 삼호 교(문화재)에서 최대 0.231 m가 세굴되는 것으로 나타났다. 그러므로 하천기본계획시 교량밀집 지역이나 단면 및 흐름 변화가 심한 구간에 대해서는 2차원 모형에 의한 홍수위 산정과 교각의 세굴에 대한 대책이 필요하고, 국가하천 및 지방하천에 대한 통합적인 분석이 필요하다. When the hydraulic structures, such as bridge and weir, are consecutively installed to a short section of a river with com-plicated cross section, analyzing the flow characteristics and the riverbed change modality of the river is very important. In the 250 m section of the Taehwa river near the Samho-bridge, which passes through Ulsan city, three bridges has been installed, and the tributary water is flowing into both up and downstream of the section, Due to these factors, when the flood occurs, the cross section of the river changes vastly by the water level change and scour, Even so, due to the fact that the Samho-bridge divides the section into two parts, the national river and the regional river, each part is being analyzed separately by the one-dimensional model. In this study, the flow characteristics due to the bridge concentration and the tributary water inflow were jointly analyzed for both up and downstream by using the one-dimensional HEC-RAS model and the two-dimensional SMS model, such as RMA2, The riverbed change modality of the section was also investigated by using the SED2D model. The results showed that the water level difference between the HEC-RAS and RMA2 was 0.87 m when applied to the three con-secutive bridges. The riverbed change simulation using SED2D showed that the maximum scour was 0,231 m and it occurred at the Samho-bridge, which located in the middle and has short pier distance, 1n conclusion, when planning the river maintenance for the regions with concentrated bridges or the sections with severe changes in cross-section and flow, estimating the flood elevation by two-dimensional model and establishing countermeasures for the scouring of the bridge are required. In addition, an integrated analysis on both the national river and the regional river is necessary.

하천 둔치의 침수양상 분석 연구

안동희(Donghee An),전우열(Wooyeol Jeon),고현수(Hyunsoo Ko) 한국방재학회 2022 한국방재학회논문집 Vol.22 No.5

도시지역의 둔치는 활발한 친수활동 및 커뮤니티의 공간으로 활용되고 있다. 본 연구에서는 둔치가 물에 잠기는 현상을친환경 사회기반시설의 유지관리 위험요인으로 특정하였다. 현재 국내외의 연구에서는 둔치의 침수 양상에 대한 분석 및둔치 복원력 회복의 구체적 방안은 제시되지 않고 있다. 따라서 본 연구에서는 태화강국가정원 일원의 수치모델링을 통해둔치침수의 양상을 분석하고자 한다. InfoWorks ICM 모형을 이용한 분석결과 동일한 수위라 하더라도 수위곡선의 상승부기울기가 가파를수록 침수범위가 증가하는 현상 및 침수의 시작지점의 특정과 확산의 양상을 확인하였다. 이러한 결과를통해 둔치 내 각종 기반시설물의 계획 및 유지관리와 예⋅경보 매뉴얼 구축 등 도시 재난 복원력 강화에 기여할 수 있을것으로 판단된다. River terraces are utilized as a space for water-friendly leisure activities in urban areas and communities. In this study, river terrace flooding was defined and selected as a maintenance risk factor for ecofriendly infrastructure. Previous studies did not propose specific measures for analyzing the pattern of river terrace flooding and restoring river terrace resilience. Therefore, this study attempted to analyze the pattern of river terrace flooding through numerical modeling of the entire Taehwagang National Garden. Based on the analysis results obtained using the InfoWorks ICM model, the higher the slope of the rising part of the water level curve, the higher the inundation range, even if the same water level conditions. Moreover, the specifications of the starting point of the inundation and the diffusion pattern were confirmed. This study contributes to strengthening urban disaster resilience, such as the planning and maintenance of various infrastructural facilities and the provision of forecast and warning manuals.