흙사면의 체적함수비 계측을 통한 사면파괴 예측기법 개발

김만일 ( Man Il Kim ),( Makoto Nishigaki ) 대한지질공학회 2006 지질공학 Vol.16 No.2

강우에 의한 사면파괴의 초기단계 및 과정을 규명하기 위하여 실내 사면모델 시험결과를 분석하였다. 이 파괴 초기단계와 관련된 수리학적 상호관계를 파악하기 위해 인공강우 살포동안 사면모델 내 체적함수비 변화를 측정하는데 목적을 두었다. 사면파괴의 과정은 인공강우동안 사면 하단부의 유출면 발달에 의해 파괴를 발생시키는 요인으로 작용하였다. 따라서 국부적인 사면파괴를 예측하기 위해서는 강우에 의해 발생된 침투수의 침투특성에 대한 장기적인 계측이 매우 중요하다. 사면 내에서 강우에 의한 침윤선의 침투 및 지하수위 상승과 밀접한 연관성을 갖는 체적함수비 변화를 3가지의 침투변화(phase I, phase II, phase III)로 나누어 사면파괴를 계측할 수 있는 수리학적 측면으로 접근하였다. 따라서 체적함수비가 급격히 증가하는 phase III 단계부터는 사면파괴 발생 가능성이 매우 증가함을 파악하였다. 그러므로 사면 내체적함수비 변화를 연속적으로 계측함으로써 강우에 의한 사면파괴의 발생을 효율적이고 실질적으로 예측할 수 있을 것으로 판단된다. This study presents the results of a series of laboratory scale slope failure experiments aimed at clarifying the process and the condition leading to the initiation of rainfall-induced slope failures. For the evaluation of hydrologic response of the model slopes in relation the process of failure initiation, measurements were focused on the changes in volumetric water content during the initiation process. The process leading to failure initiation commences by the development of a seepage face. It appears reasonable to conclude that slope failures are a consequence of the instability of seepage area formed at the slope surface during rainfall period. Therefore, this demonstrates the importance of monitoring the development seepage area for useful prediction about the timing of a particular failure event. The hydrologic response of soil slopes leading to failure initiation is characterized by three phases (phase I, II and III) of significant increase in volumetric water content in association with the ingress of wetting front and the rise of groundwater level within the slope. The period of phase III increase in volumetric water content can be used to initiate advance warning towards a failure initiation event. Therefore, for the concept outlined above, direct and continuous monitoring of the change in volumetric water content is likely to provide the possibility for the development of a reliable and effective means of predicting the occurrence of rainfall-induced slope failures.

원발성 중추신경계 림프종의 치료전략

김일만,이창영,손은익,김동원,임만빈,김상표,Kim, Il-Man,Lee, Chang Young,Son, Eun Ik,Kim, Dong Won,Yim, Man Bin,Kim, Sang Pyo 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.3

Objective : We have currently changed treatment strategies to methotrexate(MTX)-based preirradiation chemotherapy with subsequent planned radiation for the initial therapy of primary central nervous system lymphoma (PCNSL). The aim of this study was to evaluate the results of treating PCNSL with chemotherapy plus radiotherapy (CRT) or radiotherapy(RT) alone. Method and Material : This study involved 10 females and 3 males patients with a mean age of 54.2 years. All patients underwent surgery, open(8 cases) or stereotactic biopsy(5 cases) for histological diagnosis. Eleven tumors were diffuse large B-cell lymphomas. Tumor volume change in the follow-up images and survival time were evaluated in patients treated with CRT and RT alone. In the beginning, two patients received ProMACE-Cytabom chemotherapeutic regimen, but did not complete the course and died of progressive tumor 8 and 9 months after diagnosis, respectively. One patient died at 6 months before chemotherapy. These three were excluded from the survival analysis. Five patients(RT group) completed full courses of cranial irradiation with or without boost. For the current combined modality treatment, high-dose MTXbased chemotherapy(systemic and intrathecal MTX, IV vincristine, and oral procarbazine) followed by whole brain irrdiation to 45Gy to tumor was introduced in 5 patients of CRT group. Result : A complete response was achieved in three of five who received RT only and in all of five who received CRT. All patients in CRT groups are in disease free status at a mean 23 months following therapy. The RT group patients refused any additional salvage therapy at tumor relapse and survived at mean 20 months from diagnosis. The Karnofsky performance status improved in eight of ten patients with treatment. The treatment toxicity included leukoencephalopathy in RT group and severe leukopenia, transient hepatitis, avascular necrosis of femoral head, hearing loss, and amenorrhea in CRT group, respectively. Conclusion : The combined modality therapy of MTX-based chemotherapy plus radiotherapy for PCNSL may enhance tumor response and improve patient survival. The patients who received CRT should be carefully followed up because of the higher risk of treatment-induced late neurotoxicity.

가변형 회전질량 시스템을 이용한 부유체 안정화

김평강(Pyungkang Kim),변성원(Sung Won Byun),김도완(Do Wan Kim),오용삼(Yong Sam Oh),장호규(Ho Gyu Chang),곽병만(Byung Man Kwak),김경수(Kyung-Soo Kim),김수현(Soo Hyun Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5

해상에 떠있는 부유체는 파도와 바람의 영향으로 항상 흔들린다. 그 중에서도 파도의 영향이 지배적인데, 파도는 사인파 형태로 주기가 거의 일정하다. 이러한 파도의 특징을 생각해보면, 흔들리는 부유체는 사인파 형태의 모멘트를 생성하는 회전질량 시스템을 이용하여 안정시킬 수 있다. 가변형 회전질량 시스템은 기본적으로 모멘트를 생성하는 시스템으로써 네 개의 같은 질량들이 비대칭으로 배치되어 회전하며 한방향으로 모멘트를 생성하도록 구성된다. 그 모멘트의 크기는 각 질량들의 상대거리를 조절함으로써 가능하다. 본 논문에서는 가변형 회전질량 시스템을 이용하여 주파수 및 파고가 변하는 파도에 대하여 부유체를 안정화하는 법과 그 결과를 논의한다. A ship on the sea rolls constantly due to wind and waves. Wave which is the major factor for the rolling can be modeled as a sine wave with a constant frequency. Considering these characteristics of wave, it is possible to stabilize a ship by compensating the wave using rotating mass system (RMS), which generates a sine-shaped moment. An RMS consists of four masses which are placed asymmetrically so that they produce only one-directional moment. The magnitude of the moment is proportional to the relative distance among the masses and the variable RMS (VRMS) is capable of changing the distance to adjust the moment. This paper will discuss how to stabilize a ship against frequency-and amplitude-varying waves using a VRMS.

자발성 뇌내혈종의 음압배액술

김일만,손은익,김동원,임만빈,Kim, Il-Man,Son, Eun Ik,Kim, Dong Won,Yim, Man Bin 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.6

Objectives : The less invasive stereotactic surgery of hypertensive intracerebral hematoma has been preferred. Many techniques were developed to facilitate aspiration of a dense blood clot in acute stage. Authors describe a method for evacuation of putaminal hematoma via computerized tomography(CT)-aided free-hand stereotactic infusion of urokinase and frequent negative pressure aspiration. Patients and Methods : A total of ten patients with spontaneous putaminal hematoma underwent surgery with negative pressure aspiration in the three-year period. All procedures were performed within 12 hours of insult. A silicone ventricular catheter was inserted into the center of hematoma through a burr hole at the Kocher's point under local anesthesia. In a typical case of putaminal hematoma, the trajectory of catheter was pointed the center of hematoma parallel to sagittal plane vertically and the external auditory meatus posteriorly. Immediately after the first trial of hematoma aspiration low-dose urokinase solution(2,000IU/5ml saline) was administrated through the catheter and drain was clipped for 30 minutes. Subsequently, the partially liquified hematoma was manually aspirated using a 10ml syringe with a negative pressure of less than 2 to 3ml. The procedure was carefully repeated every 1 hour until the hematoma was near totally evacuated. Results : The patients population consisted composed of 4 men and 6 women with a mean age of 61.6 years. All had major neurological deficits preoperatively. The mean hematoma volume was 44.3 ml and hematoma was drained for 20 to 48 hours. No complications such as rebleeding, meningitis, or malplaced catheter were noted. Outcome was moderately disabled in four patients and good recovery in three patients. Conclusion : Although the frequent negative pressure aspiration and low-dose urokinase infusion has the disadvantage of possbility of rebleeding and infection, it is consisdered to be an effective method because it allows a simple, safe, and complete removal of hematoma.

심전도 패턴을 분류하기 위한 신경망 특성 평가

김만선 ( Man Sun Kim ),김원식 ( Wuon Shik Kim ),노기용 ( Gi Young No ),이상태 ( Sang Tae Lee ) 한국감성과학회 2003 춘계학술대회 Vol.2003 No.-

본 논문에서는 심근허혈 질환을 효율적으로 분류하기 위한 신경망을 설계하였다. European ST-T DB의 심전도로부터 ST 분절의 특징을 추출하여 입력노드를 결정하고 10개의 학습률과 학습 횟수에 따른 신경망의 MES를 계산하였다. 실험 결과 특징 파라미터의 조합을 ST0, ST80, Slope, Area로 하였을 때 MSE를 가장 작았다. 이러한 특징 파라미터를 이용하여 신경망의 입력으로 학습시킨 경우 학습 횟수의 증가에 따라 MSE가 지수합수적으로 감소하였으며 1,000회 이상에서는 둔하게 감소하였다. 또한 학습 횟수가 5,000회, 10,000회, 15,000회 각각의 경우에 대하여 학습률을 0.01부터 0.7까지 증가시키면서 MSE를 계산한 결과 학습 횟수가 증가할수록 MSE를 최소로 하는 최적학습률이 0.1부터 0.04까지 감소하였다.

독일-러시아간의 戰時掠奪文化財 返還에 관한 事例硏究

金炯晩(Hyun Man KIM) 대한국제법학회 1998 國際法學會論叢 Vol.43 No.2

6축 휠 동력계의 구조설계 및 평가

김만기(Man Gee Kim),주진원(Jin Won Joo) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.1

자동차 주행 중 도로면으로부터 차량 바퀴에 전달되는 동하중을 측정하기 위해 휠 동력계가 사용된다. 본 논문에서는 전단 변형과 굽힘 변형을 이용한 두 가지 타입의 6축 휠 동력계를 설계하고 비교평가하였다. 유한요소해석을 이용하여 휠 동력계 기본 구조에 대한 전단 변형 거동과 굽힘 변형 거동을 분석하였으며 이로부터 전단형 휠 동력계와 굽힘형 휠 동력계를 설계하였다. 변형률 해석을 반복 수행하여 각 하중에 대한 출력변형률이 미리 결정된 비슷한 값이 되도록 하고 상호간섭 변형률이 최소화 되도록 설계를 수정하고 브리지 회로를 구성하였다. 전단형 휠 동력계는 균일한 변형률 분포를 얻을 수 있어 제작시 안정된 특성치를 얻을 수 있는 반면에, 굽힘형 휠 동력계는 각 하중에 대한 출력 변형률값이 더 일정하여 균일한 감도의 좋은 성능을 얻을 수 있을 것으로 예측된다. Wheel dynamometers are used to measure dynamic load that is conveyed from the road to a vehicle while driving. In this paper, two types of six-component wheel dynamometers utilizing shear deformation and bending deformation were designed and evaluated. Prior to designing the shear and bending type wheel dynamometers, the shear and bending deformation behaviors of the basic structure of the wheel dynamometer itself were analyzed using finite element analysis. Strain analysis was performed repeatedly in order to obtain a similar output sensing strain for each load component. The design was modified with a bridge circuit in order to minimize coupling strain. The results indicated that the shear type dynamometer was expected to obtain stable characteristics due to uniform strain distribution while the bending type dynamometer was expected to obtain high-quality sensitivity performance due to consistent output sensitivity.

지속적인 경구용 Acyclovir 억제요법이 요구된 미숙아의 재발성 단순포진 바이러스 감염 1례

김성석,홍기웅,김은령,김영돈,이규만,Kim, Sung Seok,Hong, Ki Woong,Kim, Eun Ryoung,Kim, Young-Don,Lee, Kyoo Man 대한소아청소년과학회 2003 Clinical and Experimental Pediatrics (CEP) Vol.46 No.9

Acyclovir 정주요법에도 불구하고 출생 2개월 이내에 2회 재발되었던 HSV 2형에 의한 신생아 SEM 질환의 치료 및 발생억제를 위한 지속적인 경구용 acyclovir 억제요법을 실시하여 장기간 억제효과를 보았던 재발성 HSV 감염 1례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Neonatal herpes simplex virus(HSV) infections result in significant morbidity and mortality. Although acyclovir treatment has improved survival, severe neurological sequelae can occur in the majority of survivors. HSV infections limited to the skin, eyes and mouth(SEM) can cause neurologic impairment. A direct correlation exists between the development of neurologic deficits and the frequency of cutaneous HSV recurrences. National Institutes of Allergy and Infectious Diseases(NIAID) Collaborative Antiviral Study Group conducted a phase I/II trial of continuous oral acyclovir therapy for the suppression of cutaneous recurrences. We describe a preterm infant who had two recurrences after neonatal SEM disease had been treated with intravenous acyclovir, and there were no more recurrences after continuous oral acyclovir suppressive therapy for six months. We report this case with a review of related literature.

창의 인성 교육에 대한 디지털 큐레이션 시스템 개발

김정인(Jung-In Kim),김병만(Byung-Man Kim),김정주(Jung-Ju Kim) 한국멀티미디어학회 2016 멀티미디어학회논문지 Vol.19 No.9

국내 토석류재해 대응을 위한 시설기준의 현안 및 대책

김만일 ( Man Il Kim ),이문세 ( Moon Se Lee ),장범수 ( Buhm Soo Chang ),방돈석 ( Don Seok Bang ),이종건 ( Jong Gun Lee ) 대한지질공학회 2011 대한지질공학회 학술발표회논문집 Vol.2011 No.-