[NEWS] 신진연구자 소개_이준호 Joon-Ho Lee

이준호(Joon-Ho Lee) 대한화학회 2023 화학세계 Vol.63 No.5

정맥용 면역글로불린 투여 후 발생한 무균성 수막염 3례

이준호,송은경,이진아,김남희,김동호,박기원,최은화,이환종,Lee, Joon Ho,Song, Eun Kyoung,Lee, Jin A,Kim, Nam Hee,Kim, Dong Ho,Park, Ki Won,Choi, Eun Hwa,Lee, Hoan Jong 대한소아감염학회 2005 Pediatric Infection and Vaccine Vol.12 No.2

IVIG 투여에 의해 무균성 수막염은 그 기전이 밝혀지지 않았으나 IVIG 투여와 관련된 신경학적 부작용 중 가장 중한 합병증의 하나이다. 저자들은 서울대학교 어린이병원에서 2003년부터 2004년까지 3명의 환아에서 확인된 IVIG 투여와 관련된 무균성 수막염 4례를 경험하여 보고하였다. 3명의 환아는 ITP, 가와사키병, 중증 근무력증으로 기저질환은 각각 상이하였으나 기저질환에 대한 치료를 위해 모두 고용량의 IVIG를 투여받았으며, IVIG를 투여받은 후 1~2일 이내에 심한 두통과 뇌막자극 징후를 보였다. 척수액 소견상 백혈구 수는 $100/{\mu}L$ 미만에서부터 $1,000/{\mu}L$ 이상까지 다양하였으나 주로 다핵구로 구성된 척수액 백혈구 분포를 보였고(66~98%), 세균 배양검사와 장바이러스 배양과 PCR 검사에서 음성 결과를 보였다. 3명의 환아 모두 수막염 발생 2일 후까지는 증상이 호전되었으며, 후유증 및 장애가 없었다. Intravenous immune globulin(IVIG) is widely used for immune thrombocytopenic purpura (ITP), Kawasaki disease and other autoimmune neuromuscular disease. Aseptic meningitis was one of the most serious neurologic complications reported following the use of IVIG. We experienced 4 episodes of aseptic meningitis associated with IVIG usage in 3 patients from 2003 to 2004. Underlying disease of each patients was ITP, Kawasaki disease and myathenia gravis and all of them received high dose IVIG treatment for their underlying disease. Within a days, they started to complain severe headache and diagnosed meningitis by cerebrospinal fluid analysis. Cerebrospinal fluid leukocyte counts varied from 92 to over a thound per microliter with dominance of polymorphonuclear leukocytes. Microbiologic studies revealed no organisms. All of them were free from headache within 2 days and did not suffer any neurological sequelae.

A 37Ch Visible Adaptive Optics System for Wavefront Compensation

이준호,Byung Tae Choi,Eung Cheol Kang,Hae Seog Kho,Ho Jung Cheon,Jae Il Lee,Joon Won Kim,Kyung Muk Lee,Sung Jin Kim,Young Cheol Lee,Young Il Cho 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.1

A visible adaptive system was developed to compensate for phase distortions of a visible (He-Ne) laser. The visible adaptive optics (AO) system consists of 5 subsystems: a Shack-Hartmann wavefront sensor, a deformable membrane mirror of 15 mm with 37 actuators, a high-speed tip/tilt mirror of 20 mm, a position sensor and a control & display unit. The lab-developed Shack-Hartmann sensor was experimentally shown to have a measurement accuracy of better than RMS /50 at 0.6328 μm over the maximum phase distortion that the deformable mirror could generate, i.e., approximately /4. The adaptive optics system operated the deformable mirror at 10 Hz and the tip/tilt mirror at 30 Hz, which were, respectively, closed by the Shack-Hartmann sensor and the position sensor. The closed adaptive optics system was demonstrated to compensate for time-varying wavefront aberrations of PV (Peak-to-Valley) 1.2 μm with a time frequency of 1.4 Hz. The residual RMS wavefront error was shown to be smaller than 0.014 μm, i.e., /45 at 0.6328 μm.

판상형 격간벽 시스템 건물의 반응수정계수

이준호,전용,김진구,Lee, Joon-Ho,Jeon, Yong,Kim, Jin-Koo 대한건축학회 2011 대한건축학회논문집 Vol.27 No.7

In this study seismic performance and response modification factors of rectangular reinforced concrete staggered wall system (SWS) structures were evaluated. To this end, 5, 9, 15, and 25-story SWS structural models were designed and were analyzed by pushover analysis to observe the force-displacement relationship up to failure and the location of plastic deformation. The response modification factor was computed based on the overstrength and the ductility capacities obtained from capacity envelopes. The analysis results showed that the 5- and 9-story SWS structures failed due to yielding of columns and walls located in the lower stories, whereas in the 15- and 25-story structures plastic hinges were more widely distributed throughout the stories. The response modification factors obtained by multiplying overstrength factor and ductility factor increased as the number of stories decreased.

하천복원을 위한 하천평가기법의 적용성 연구

이준호,강태호,성영두,윤세의,Lee. Joon-Ho,Kang. Tae-Ho,Sung. Young-Du,Yoon. Sei-Eei 한국방재학회 2003 한국방재학회논문집 Vol.3 No.4

본 연구의 목적은 하천 관리자들에게 하천의 자연성 증진의 중요성을 이해시키고, 하천을 자연스러운 상태로 되돌리는 과정에서 하천이 처한 상황에 대한 진단과 처방을 위한 하천자연도 평가 방법을 개발하는 것이다. 본 연구에서는 하천의 자연도평가와 그 적용성의 확인을 위해 수로의 발달, 종방향, 횡방향, 하상구조, 저수로변 구조, 하천주변, 수질 등 7가지 자연도 평가기법의 항목을 제안하였다. 자연도평가를 위해 복하천을 대상하천으로 선정하였다. 복하천에서 자연도지수는 <TEX>$2.2{\sim}3.8$</TEX>정도였고, 평균지수는 3.1로 대부분이 3등급을 나타내었다. 7개 지수 중에서 횡단면이 가장 높은 등급이었고, 수로의 발달이 가장 낮은 등급이었다. 본 연구에서는 하천의 자연도 등급을 통해 하천의 자연성을 파악할 수 있었으며, 복원해야 할 하천의 선택과 훼손된 하천의 복원구간 및 방법을 결정할 수 있었다. The purpose of this study was to develop a new method for evaluation of stream naturalness in order to promote stream managers` understanding on importance of improving stream naturalness, and in order to appraise and prescribe for streams effectively in the process of ecological restoration of stream corridors. In order to analyze the evaluation method of stream naturalness and its applicability to streams, stream naturalness index(SNI) which has seven factors such as channel development, longitudinal profile, lateral section, stream bed structure, low flow channel structure, stream surroundings and water quality was suggested in this paper. For case studies, Bokha stream was selected for the evaluation of stream naturalness. At the Bokha stream, the scores of SNI factors were in range of <TEX>$2.2{\sim}3.8$</TEX>, and the average of SNI was 3.1, and the most frequent grade of SNI factors was grade 3. Among the 7 factors, the best was lateral section, and the worst was channel development. In this study, SNI grade can represent the characteristics of stream naturalness well and select the streams which will be restored, and can also decide the segment and the method of restoration for deteriorated streams.

A Case of Direct Invasion of the Parotid Gland by Cutaneous Squamous Cell Carcinoma

이준호,신혜경,최진수,장태정,Lee, Joon Ho,Shin, Heakyeong,Choi, Jinsu,Jang, Tae Jung Korean Cleft Palate-Craniofacial Association 2013 Archives of Craniofacial Surgery Vol.14 No.2

Cutaneous squamous cell carcinoma is the second-most common skin cancer and represents 20% of all skin cancers. Cutaneous squamous cell carcinoma often spreads to the parotid gland through lymph nodes, but, direct invasion of an adjacent organ may also occur. We present the case of 78-year-old man with ulcerated mass on the right infra-auricular area. The histopathologic finding was squamous cell carcinoma. There was no evidence of distant metastasis, but the mass was found to invade the superficial lobe of the right parotid gland. The mass was widely excised and superficial parotidectomy was performed while preserving the facial nerve. The defect was covered by primary closure. Postoperative radiotherapy was performed. At 20 months after surgery, our patient had no facial palsy, local recurrence, or metastasis. Cutaneous squamous cell carcinoma involving the parotid gland is an aggressive, rapidly advancing lesion, which if not recognized and treated early will result in high morbidity and mortality. Squamous cell carcinoma of the parotid gland has shown that patients who receive adjuvant radiotherapy have a lower recurrence rate and a higher survival rate than patients treated with surgery alone. The role of elective neck dissection remains controversial.

지진 취약도 분석 및 보수 비용 평가

이준호,Lee, Joon-Ho 한국공간구조학회 2019 한국공간구조학회지 Vol.19 No.2

특성화고 조경과 학생들의 기능인력 양성에 관한 연구

이준호,정태열,Lee, Joon-Ho,Jung, Tae-Yeol 한국조경학회 2013 韓國造景學會誌 Vol.41 No.2

특성화 고등학교(이하 특성화고)의 교육 목적은 행복한 직업인이 되기 위한 직업 기초능력의 배양에 있고, 학생들은 배운 직업 기초능력을 토대로 사회에 진출하여 자신의 적성과 흥미, 가치관에 맞는 직업을 찾아야 한다. 그래서 특성화고의 목적 달성과 비전제시를 정확히 하기 위해 정부가 많은 노력을 하고 있으며, 정부 주도의 구조 지향적 방향 제시는 사회구조와 개인의 인식에 많은 영향을 미칠 것으로 생각된다. 다가오는 선진 한국 사회에서 직업인으로서 행복하게 살아가기 위하여 사회구조의 핵심이 될 수 있는 사회편견(차별)과 인식이 전환되어야 하고, 그 해결점은 배우는 학생의 올바른 가치관 형성과 더불어 그들이 안정적인 미래를 보장 받을 수 있는 직업선택의 구조를 만들어 주는 것이 중요하다고 생각한다. 본 연구는 목적을 벗어난 무조건적 진학 위주의 특성화고 문제점을 안고 있는 조경과 학생들을 대상으로 기능인력 양성 만족도에 관한 분석을 수행하고자, 조경과가 설치된 전국 11개 지역의 특성화고 교육계획서, 공통으로 배우고 있는 교과서, 특성화고 직업교육 정책과 관련한 정부간행물, 특성화고에서 조경을 전공하고 있는 학생들의 설문조사를 활용하였다. 그 결과, 교육계획서 분석을 통하여 각 학교별 교과 및 직업교육과정에 대한 프로그램 유형과 빈도를 알 수 있었고, 교과서 내용 분석에서는 취업 시 필요한 전문적인 기능을 양성할 수 있는 교과서 내용의 수준과 가감의 필요성을 확인하였다. 또한, 교육과학기술부의 특성화고 직업교육 정책 분석에서 직업교육 과정 및 체제의 특징을 밝혔으며, 11개 학교 조경전공 학생들의 설문 조사를 통해 교육계획서, 교과서, 정부직업정책, 진로선택으로 나누어, 실제 학교에서 교육 수요자인 학생들이 느끼고 있는 진로 직업교육에 대한 비교 분석을 하였다. The goal of vocational school is to provide students with basic skills and help develop them to have satisfactory careers. With the knowledge they have learned, it helps them to find their interests and aptitudes when they graduate. The government is putting a lot of effort into clarifying the goal accomplishment and the vision proposals of vocational schools, and the structure-oriented guidance controlled by the government is thought to be very influential to the social structure and individual perceptions. Social stereotypes(discrimination) and perceptions that can be the core of a social structure need to be transformed for people to be fulfilled in their careers in the upcoming advanced Korean society. The important solution is to form correct values and a system of career selection which can ensure a stable future for students. Therefore, to carry out research regarding training human resources in terms of students from vocational schools' landscape architecture majors in an approaching method with a new perspective, we analyzed education plans from vocational schools in 11 regions, textbooks used in common, governmental publications regarding career education policies of vocational schools and questionnaires from students who are majoring in landscape architecture at vocational schools. As a result, we were able to find out the types and the frequencies of career-occupation education at each school through analysis of education plans and the necessity to control the amount and the level of the contents for high school students to have careers in analyzing textbooks. In addition, in Ministry of Education, Science and Technology's analyzing career education policies of vocational schools, we figured out the government's policies and directions of training. From the questionnaires from students majoring in landscape architecture, we were able to compare and analyze the satisfaction level of students on career education(education plans), textbooks, governmental career policies and career selection.

복합 슬릿-마찰 감쇠장치가 적용된 철근 콘크리트 특수 모멘트 저항골조의 내진성능 평가

이준호,김기철,김진구,Lee, Joon-Ho,Kim, Gee-Cheol,Kim, Jin-Koo 한국공간구조학회 2017 한국공간구조학회지 Vol.17 No.4

This study develops a new hybrid passive energy dissipation device for seismic rehabilitation of an existing structure. The device is composed of a friction damper combined with a steel plate with vertical slits as a hysteretic damper. Analytical model is developed for the device, and the capacity of the hybrid device to satisfy a given target performance is determined based on the ASCE/SEI 7-10 process. The effect of the device is verified by nonlinear dynamic analyses using seven earthquake records. The analysis results show that the dissipated inelastic energy is concentrated on the hybrid damper and the maximum interstory drift of the SMRF with damping system satisfies the requirement of the current code.

국내 도시하천에 대한 식수허가지도의 적용성 검토

이준호,윤세의,Lee, Joon-Ho,Yoon, Sei-Eui 한국방재학회 2005 한국방재학회논문집 Vol.5 No.3

도시하천의 관리와 계획에 있어 식수에 따른 수리학적 특성의 변화는 명확히 분석되어야 한다. 본 연구에서는 도시하천의 식수기준을 분석하고, 도시하천의 고수부지내 식수가 가능한 지역을 표시한 식수허가지도 제작 방법을 검토하였다. 또한 식수에 따른 수리학적 영향을 준2차원 수치모형, HEC-RAS, FESWMS 모형을 활용하여 분석하였다 중랑천의 장안교부터 군자교까지의 구간을 대상으로 선정하여 100년 빈도 홍수량에 식수허가지도를 제작한 결과, 교목의 식수시에는 하천의 우안에 $0.5{\sim}1$본/ha 정도의 식수가 가능하였으며, 관목의 경우에는 좌안 및 우안의 중요수방구간을 제외한 지역에 식재가 가능하였다. 또한 관목의 식재에 따른 수리학적 영향은 약 12cm 정도의 수위상승 결과를 나타내었다. 따라서 대상구간에 식수에 따른 수위 상승은 적은 것으로 판단되므로 식수허가지도에 따라 식수가 가능할 것으로 판단된다. In order to design and manage the urban streams, the change of hydraulic characteristics by vegetation must be analyzed clearly. Planting criteria of vegetation in a urban stream were investigated and the design method of vegetation permission map was analyzed in this study. In addition, variations of water level due to vegetation are calculated by quasi two dimensional numerical model, HEC-RAS model and FESWMS model. Joongrang stream(Gunja bridge${\sim}$Jangan bridge reach) was selected as the case study stream. According to the criteria of vegetation, it is decided that vegetation density was $0.5{\sim}1.0$ tree/ha for selected tall tree in right floodplain and shrubs can be planted in the right and left floodplain area except the important hydraulic structures site. The selected shrubs planting simulations with three models show that water level in selected floodplain area increase approximately 12cm for the 100 year return period flood. The applicability of vegetation permission map in Korean urban stream was analyzed in this paper.