두부손상이 동반된 슬관절 인대손상의 보존적 치료

최영철,최영안,김준영,공보석 대한골절학회 1989 대한골절학회지 Vol.2 No.1

Operative treatment has been used in unstable ligamentous imjury of knee joint. We experienced three cases of ligamentous injury of knee that was accompained with head trauma and other organ injury. Despite of surgical candidate, we did only conservative treatment due to poor general condition and difficulty of anesthesia, The result was relatively better than we expected. We reported these cases.

서·남해 EEZ 골재채취단지 운영 및 해양환경영향조사 현황

최영철 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6

In-DEBS 현장시험 시스템 구축

최영철,김진섭,윤석,이창수 한국방사성폐기물학회 2019 방사성폐기물학회지 Vol.17 No.Special

The paper describes the process of developing and implementing In-DEBS (In-situ Demonstration of Engineered Barrier System) for analyzing thermal-hydraulic-mechanical (THM) coupled behavior characteristics of an engineered barrier system in a high-level waste disposal system. The engineered barrier system is composed of a disposal canister, buffer, and near field rock. In-DEBS is designed to analyze the THM coupled behavior due to the inflow of underground water and the heat of disposal canisters in the buffer and near field rock. Since it is difficult to assemble the buffer block while installing sensors and heaters in a disposal hole, the buffer blocks were assembled from the outside. OBPA (One-Body Pre-Assembly) assembled with buffer blocks, sensors and heater requires special transport equipment to accurately insert it into the disposal hole because the total weight is about three tones. In this study, the fully assembled buffer block was inserted by developing a crane exclusively for In-DEBS, which can be moved into an accurate position by lifting more than five tones. To analyze the THM coupled behavior of the near field rock, 4 test holes were cored around In-DEBS and a total of 40 temperature sensors and 5 pore pressure sensors were installed in the test hole. A total of 185 sensors for temperature, relative humidity, pressure and displacement sensors were installed in the In-DEBS. All sensors were connected to a multichannel measuring system that stores field data in real time. 본 논문은 고준위폐기물 처분시스템에서 공학적방벽의 열-수리-역학적(Thermal-hydraulic-mechanical) 복합거동 실증을 위한 In-DEBS (In-situ Demonstration of Engineered Barrier System) 를 개발하여 구축하는 과정에 대해 설명한다. 공학적방벽은 크게 처분용기, 완충재 그리고 근계암반으로 이루어져 있는데, In-DEBS는 완충재 및 근계암반을 대상으로 지하수 유입 및 처분용기의 발열에 의한 THM 복합거동을 분석할 수 있도록 설계되어 있다. In-DEBS 현장시험은 A-KRS의 1/2.3 규모로 설계되어 있기 때문에 처분공의 지름이 약 860 mm로 작게 굴착하였다. 따라서, 처분공 안에서 센서와 히터를 삽입하면서 완충재 블록을 조립하는 것은 힘들기 때문에 완충재 블록 일체형 설치 틀(OBPA)를 개발하여 외부에서 모두 조립하였다. 완충재블록, 센서 및 히터가 조립 완료된 일체형 설치 틀은 총 무게가 약 3톤으로 매우 무겁기 때문에, 처분공에 정확히 삽입하기 위해서는 특별한 운송기구가 필요하다. 본 연구에서는 레일을 이용하여 5톤 이상의 무게를 들어서 정확한 위치에 정치시킬 수 있는 In-DEBS 전용 크레인을 개발하여 조립완료된 완충재 블록을 삽입하였다. 근계암반의 THM 복합거동을 분석하기 위해 In-DEBS 주위로 4개의 시험공을 굴착하여 총 40개의 온도 센서와 5개의 간극수압계를 설치하였다. 또한 근계암반의 변위를 측정하기 위해 원거리에서 두 개의 경사공을 굴착하여 총 10개의 변위 센서를 삽입하였다. In-DEBS에는 공학적방벽시스템에 온도, 상대습도, 압력, 그리고 변위 센서 등 총 185개의 센서가 설치되어 있으며, 이 센서들은 모두 다채널 동시 측정이 가능한 계측시스템에 연결되어 실시간으로 현장데이터를 저장하게 된다.

[미쉬나: 유대인과 함께 읽는 성서 05] 미쉬나 제4권 ‘네지킨’: “반드시 배상할지니라”

최영철 대한기독교서회 2019 基督敎 思想 Vol.725 No.-

GAODV 라우팅 프로토콜의 연결성

최영철,Choi, Youngchol 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.7

Ad-hoc on-demand distance vector (AODV) 경로요청 패킷의 브로드캐스트 스톰 문제를 개선하기 위해 제안된 라우팅 프로토콜들은 경로 요청 패킷을 선택적으로 재방송하는데, 노드 밀집도가 낮은 시나리오에서 이러한 선택적 재방송 기법들의 연결성은 AODV보다 작아지게 된다. 경로 요청 패킷을 선택적으로 재방송하는 라우팅 프로토콜의 동작 요구 조건을 명확하게 하기 위해서는, 연결성과 노드 밀집도 사이의 관계 규명이 필요하다. 본 논문에서는 노드들이 균일 분포로 배치되었다는 가정 하에, 임의의 위치에서 geographical AODV (GAODV)의 연결성이 손상되지 않을 확률을 유도한다. 또한, 연결성이 손상되지 않을 확률을 이용해서 GAODV의 종단 간 연결성을 근사할 수 있는 직관적인 방안을 제시한다. 시뮬레이션을 통하여 0.9 및 0.99의 연결성을 보장하기 위한 노드 밀집도를 도출하고, 이론적인 결과와 비교함으로써, 이론적으로 유도된 연결성의 유효성을 보인다. The route request (RREQ) packet is selectively re-broadcasted in the routing protocols that improve the broadcast storm problem of the ad-hoc on-demand routing protocol (AODV). However, in a low node density scenario, the connectivity of these selective rebroadcast schemes becomes less than that of the AODV. In order to clarify the requirements of these selective re-broadcast routing protocols, it is necessary to investigate the relationship between the node density and the connectivity. In this paper, we drive a probability to preserve the connectivity of the GAODV at an intermediate rebroadcast node. In addition, we present an intuitive method to approximate the end-to-end connectivity of the GAODV. We draw the required node density to guarantee the connectivity of 0.9 and 0.99 through computer simulations, and verify the validity of the derived theoritical connectivity by comparing with the simulation results.

Microstructure and Electrochemical Characterization of Polyazomethine-derived Carbon Nanofibers

최영철,정영규 한국고분자학회 2019 한국고분자학회 학술대회 연구논문 초록집 Vol.44 No.1

Fabrication and Electrochemical Characterization of Hybrid Carbon Nanofibers Containing Lanthanum Manganate

최영철,정영규 한국고분자학회 2019 한국고분자학회 학술대회 연구논문 초록집 Vol.44 No.2

The Value of Initial Ionized Calcium as a Predictor of Mortality and Triage Tool in Adult Trauma Patients

최영철,황성연 대한의학회 2008 Journal of Korean medical science Vol.23 No.4

Ionized hypocalcemia is a common finding in critically ill patients, but the relationship between ionized hypocalcemia and mortality risk in trauma patients has not been well established. The aim of this study was to assess the usefulness of initial ionized calcium (iCa) in predicting mortality in the trauma population, and evaluate its superiority over the three other triage tools: base deficit, systemic inflammatory response syndrome (SIRS) score, and triage-revised trauma score (t-RTS). A proand retrospective study was performed on 255 consecutive trauma patients admitted to our Emergency Medical Center from January to December, 2005, who underwent arterial blood gas analysis. Multivariate logistic regression analysis confirmed iCa (≤0.88 mM/L), low Glasgow coma scale score, and a large transfusion amount to be significant risk factors associated with mortality (p<0.05). The sensitivities of iCa, base deficit, SIRS score, and t-RTS were 82.9%, 76.4%, 67.1%, and 74.5%, and their specificities were 41.0%, 64.1%, 64.1%, and 87.2%, respectively. Receiver operating characteristic curve analysis determined the areas under the curves of these parameters to be 0.607±0.062, 0.736±0.056, 0.694±0.059, and 0.875 ±0.043, respectively (95% confidence interval). Although initial iCa (≤0.88 mM/L) was confirmed as a significant risk factor associated with mortality, it exhibited a poorer discriminative power for mortality prediction than other predictors, especially t-RTS.

봄의 희(喜) 외 2편

최영철 오늘의 문예비평 1995 오늘의 문예비평 Vol.- No.-

이스라엘 정착촌 건설운동과 구쉬 에무님(Gush Emunim)

최영철 한국외국어대학교 중동연구소 2002 중동연구 Vol.21 No.-

The study examines the issue of the Jewish settlement movement and Gush Emunim. Gush Emunim (B1oc of the Faithful), an extra-parliamentary religious Zionist movement, advocates the extension of Israeli sovereignty over the West Bank and Gaza Strip which were occupied in 1967 by Israel as a vital goal of Zionist fufillment. They seek to create a massive Jewish civilian presence throughout these occupied territories engaging in settlement activities. Gush Emunim, which was founded in February 1974, draws its ideological inspirartion from the teachings of the Rabbi Zvi Yehuda Kook who is the son of the first Ashkenazi Chief Rabbi during the British mandate and was head of the Merkaz Harav Yeshiva. Rabbi Zvi Yehuda Kook taught that the main purpose of the Jewish people is to attain both physical and spiritual redemption by living in and building up an integral Eretz Yisrael(Land of Israel). This study attempts to explicate the ideological origin and political attitude of the Gush Emunim and explain how Gush Emunim has been developed and its settlement activities have been conducted in the West Bank and Gaza Strip. This paper also examines the trend of the settlement construction and relates it to the Oslo peace process which was launched in 1993.