양측성 관상동정맥루 1예

최용원,오석규,이재훈,이상재,권경희,최은경,김남호,정진원 圓光大學校 醫科學硏究所 2002 圓光醫科學 Vol.17 No.1

저자들은 호흡곤란, 흉부불쾌감, 심계항진 등을 주소로 내원한 환자에서 경흉부 및 경식도 심초음파 검사상 주폐동맥에서 이완기에 전행하는 지속적인 혈류의 흐름을 관찰하고, 관상동맥 조영술을 통해 좌전하행지 중간부위와 우관상동맥 근위부에서 각각 기시하여 공통경로를 이루면서 주폐동맥으로 유입되는 양측성 관상동정맥루를 보이는 드문 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. A coronary arteriovenous fistula is infrequently encountered vascular communication between a coronary artery and a cardiac chamber, a great artery or the vena cava. It is the most common congenital anomaly that can affect coronary perfusion. Bilateral involvement of coronary fistula constitutes an uncommon subgroup of coronary arteriovenous fistulas. A 69 year-old female patient presented with chest discomfort, palpitation, and dyspnea. In the echocardiography, doppler color flow imaging visualized abnormal flow signals with mosaic appearance in the main pulmonary artery during diastolic phase. Coronary angiography revealed arteriovenous fistula arising from the left anterior descending artery and the right coronary artery. Both coronary arteriovenous fistulas drained into the main pulmonary artery. We report a case of bilateral coronary arteriovenous fistula that was confirmed by echocariography and coronary angiography.

고속 HMC 이송계의 운동특성 평가 및 운동오차 예측

최헌종,허남환,강은구,이석우,홍원표 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

Recently, the evolution in production techniques (e.g. high-speed milling) and the complex shapes involved in modern production design has been increasingly popular. The key to the achievement is a drastic improvement of the dynamic behavior of the machine tool axes used in production machinery. The more complex these tool paths the higher the speed and acceleration requirements. But it is very difficult to reach the target for high speed machine tool because of the limitations of servo system and motion control system. However the direct drive design of machine tool axes, which is based on linear motors and which recently appeared on the market, is a viable candidate to meet the ever increasing demands, because of these advantages such as no backlash, less friction, more mechanical simplicity and very higher acceleration and velocity comparing to the traditional system. This paper focused on the performance tests of the high speed horizontal machine tool based on linear motor. Especially, dynamic characteristics were investigated through circular test and circular form machining test is carried out considering many important parameter. Therefore these several experiments is used to be evaluated the model for prediction of circular motion error and circular machined error.

사후분해 시체에 대한 법의학적 접근

최영식,이상용,김유훈,조갑래,이봉우,양경무,정낙은,서중석,이한영,이원태,강현욱 大韓法醫學會 2000 대한법의학회지 Vol.24 No.2

Disposal of a homicide victim by dismemberment is rare, but individual cases are on record in most major medicolegal departments. Recognition of postmortem mutilation may be of importance in the interpretation of certain murders committed by sexual perverts and other mentally deranged individuals and sometimes performed for the sole reason of easier disposal of the body. Postmortem dismemberment is usually readily recognizable as such; The edges of the injuries are dry and lack evidence of bleeding. The joints may be disarticulated without fracture, or the use of an axe or saw may be evident from examination of bones. Parallel horizontal or oblique furrows in the bone surface are caused by skipping of the saw prior to establishing depth. Such patterns on the bone may assist in identifying the particular saw involved. So we report 25 dismembered corpses that autopsied in National Institute of Scientific Investigation. This paper can help in attempting to establish not only the first criminal investigation steps but also the medicolegal approach methods in unidentified and dismembered deaths.

고속가공에서 2중 신경망을 이용한 표면거칠기 예측과 가공DB 구축 효율화 방안

원종률,남성호,유송민,이석우,최헌종 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

In this paper, a double artificial neural network (ANN) approach and the efficient machining database building scheme are presented for the prediction of surface roughness in high-speed machining. In this approach, 4 machining parameters and used for the prediction of cutting force components, and the combinations of 4 parameters and the predicted cutting force components are finally used for the prediction of surface roughness. The experimental results comparing the these results with the predicted values using simple 4 input nodes have been also investigated to verify the effectiveness of the proposed approach.

한국의 지방자치제와 지방분권운동 : 부산지역을 중심으로

최원석 신라대학교 부산학연구센터 2018 부산연구 Vol.16 No.1

This paper begins with the recognition that local autonomy in Korea was not properly operated despite the resurgence of the local autonomy system in 1991, and that the development gap between the national capital region and the province grew larger. Therefore, this paper aims to examine followings: first, what role of central government, local governments and civil society organizations in the region was for the development of local autonomy and decentralization; second, what was the decentralization movements in Busan; third, what are the institutional reform tasks in the next. Despite the implementation of the local autonomy system, Korea stays in the '20 percent autonomy' because of the lack of awareness of the central government on the local autonomy and the lack of will to implement the local autonomy in the local government.There are two decentralization movement groups in Busan's: including “the Busan Innovation Center for Decentralization Movement” and “The Busan Citizens' Solidarity for Decentralization”. While these organizations are making great efforts to decentralize, their organizational capacity does not seem significant. On the other hand, an amendment to the constitution to be made in the future can be an important opportunity for the development of local autonomy and decentralization. Therefore, local governments, local NGOs, and local residents should endeavor for building institutional foundations for substantial development of decentralization, even if the achieving them is difficult. 이 글의 문제인식은 우리나라의 지방자치제가 부활했음에도 불구하고 지방자치는 제대로 시행되지 않았고, 수도권과 지방의 발전 격차는 더 커졌다는 것에서 출발한다. 따라서 이 글의 주요 목적은 첫째, 그러한 상황 속에서 중앙정부와 지방자치단체, 지역사회단체는 어떤 역할을 했는지, 둘째 부산의 지방분권운동은 어떠했는지, 셋째 앞으로 제도적 개선과제는 어떤 것들이 있는지를 살펴보는 것이다. 이를 위해 먼저, 우리나라의 지방자치의 역사와 부활에 대해 살펴보고, 다음으로 지방자치의 의의와 지방분권에 대해 살펴보고, 현재 우리나라 지방자치제도의 문제점과 한계에 대해 살펴보았다. 끝으로 시민운동으로서 부산지역 지방분권운동의 흐름에 대해 살펴보고 향후 제도적 개선과제에 대해 살펴보았다. 우리나라는 지방자치제를 실시했음에도 불구하고 지방자치에 대한 중앙정부의 인식 결여, 지방자치단체의 실천의지의 부족 등으로 ‘2할 자치’에 머무르고 있다. 부산의 분권운동 단체로는 「부산분권운동혁신본부」와 「지방분권부산시민연대」가 있다. 이들 단체들이 지방분권을 위해 많은 노력을 기울이고 있지만, 조직적 역량은 그리 커 보이지 않는다. 한편, 앞으로 있을 개헌은 지방 자치와 분권의 발전을 위한 중요한 계기가 될 수 있다. 그렇기에 지방정부, 지역 시민단체, 지역의 주민들이 많은 역량을 투입해서라도 실질적 지방분권을 마련할 수 있는 제도적 기반을 정초하는 데 앞장서야 한다.

충남지역 석불의 암석학적 풍화특성에 관한 연구

최석원,채상정,이효민 공주대학교 문화재보존과학연구소 2003 문화재과학기술 Vol.2 No.1

충청남도내의 중요문화재로 지정된 석불 중 역사적 중요성을 가지고 구조적으로 보아 위험성이 있는 것으로 판단되는 석불 31개를 대상으로 암석학적 특징, 풍화에 의한 암석의 조직 및 광물학적 변화, 풍화에 따른 물성 변화 등, 석불을 이루고 있는 암석의 풍화특성을 파악하였다. 석불을 이루고 있는 암석은 대부분이 중립 내지 조립질의 화강암류이며, 소수 석불만이 편마암으로 이루어져 있다. 시료채취가 가능한 12개 화강암류 석불의 모드분석 결과, 흑운모화강암 8개, 반상화강섬록암 3개, 화강섬록암 1개로 분류되었다. 이것들은 암석자체에 많은 절리, 박리조직과 심한변색을 보이고 있다. 편광현미경하에서의 관찰 결과, 장석류는 견운모화작용이 심하고, 흑운모는 녹니석화작용으로 주변광물을 변색시키며, 석영은 일정한 방향으로 균열이 발생하는 등의 조직변화가 일어나고 있다. 석불을 구성하고 있는 암석은 풍화가 많이 진행되어 카올리나이트화 되었으며. 풍화등급은 MW에서 HW에 속한다. 따라서 대부분의 석불들은 풍화를 많이 받은 상태이고, 각 석불의 풍화특성을 고려하여 과학적이고 비파괴적인 보존방법이 연구되어야 할 것이다. This study was carried out the survey of the petrological weathering characteristics as the petrological texture and the mineralogical alteration and the change of rock physical properties by weathering for 31 Stone-Buddhist images designed as important cultural property in Chungnam province. Most rocks composing Stone-Buddhas are classified into granite which is medium to coarse, but some Stone-Buddhist images comprise in gneiss. As the result of modal composition for 12 Stone-Buddhist images being possible to take samples, they are classified into 8 biotite granite, 3 porphyritic granodiorite and 1 granodiorite, which are showed with many joints, exfoliation and intensive discoloration. Referring to the result of observation under the polarizing microscope, some feldspar are being sericitizated and some biotite are being changed to chlorite Under the observation with SEM, some feldspar are changed into lamella-kaolinite by the weathering. Most rocks composing the stone Buddhist images are being weathered much and kaolinited, and its weathering level is classified into MW to HW referring to the result of these studies. Accordingly it is required studying scientific and undestructive method considering the weathering distinction of Stone-Buddhist images.

미생물 컨소시엄에 의한 페놀수지 Resole의 분해

최원식,차민석,오계헌 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.1

Microbial consortia were screened for their ability to degrade resole at the sole carbon source. Five microbial consortia were derived from a plant site where a biological treatment of liqid waste stream of a manufacturing facility was located. Among the consortia, the test consortium, designated as MS2, displayed approximately 70% degradation of the substrate, 0.1 g of resole per liter, within the first twelve days of incubation but the degradation did not proceed to completion. pH was decreased and resole degradation was inhibited under the conditions. UV-spectroscopy was used quantitatively to monitor the residual concentrations of resole in the present work. UV-scans of spent culture showed that wavelength of maximum absorption was 216nm for resole.

Aspergillus oryzae를 이용한 캡슐형 메주의 품질특성

최재훈,권선화,이상원,남상해,최상도,박석규 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 한국식품저장유통학회지 Vol.10 No.3

전통메주의 표면에서 발행하는 야생곰팡이 착생, 유해곰팡이에 대한 mycotoxin 생성 및 메주 표면의 과도한 건조 등을 해결하기 위하여 메주 외층에 Aspergillus oryzae로 만든 쌀 종국(0.3%, w/w)을 혼합시킨 증자 검정콩으로 얇게 코팅한 후, 25℃, 상대습도 80%에서 14일간 발효시킨 캡슐형 메주를 개발하였다. 캡슐형 메주의 표면에서 야생곰팡이의 오염은 발견되지 않았으나, 대조구 메주는 12일 이후에 푸른곰팡이가 많이 관찰되었다. 메주의 수분 함량은 평균 32.7%로서 34.7~29.4%의 범위를 나타내었다. 적정산도는 캡슐형 메주가 대조구 메주보다 높게 나타났으며, 대두 캡슐형 메주와 검정콩 캡슐형 메주는 비슷하게 나타났다. 유리당의 함량은 검정콩 캡슐형 메주가 123.98㎎%로 대조구 메주 15.02㎎%와 대두 캡슐형 메주 59.85㎎%보다 각각 10배, 2.1배, 높게 나타났다. 아미노산성 질소의 함량은 대조구 메주에서 147.00㎎%였으며, 검정콩 캡슐형 메주는 255.50㎎%로서 대두 캡슐형 메주 187.25㎎%보다 약 1.37배 높은 함량을 나타내었다. 총 유기산의 함량은 캡슐형 메주(대두 119.98㎎%, 검정콩 95.94㎎%)가 대조두 메주(26.44㎎%)보다 함량이 높게 나타났으며, 캡슐화에 따라 lactic acid와 malic acid 가 가장 큰 변화를 나타내었다. 색차계 색도는 검정콩 캡슐형 메주가 대두 캡슐형 메주보다 명도값(L)이 크게 나타났으며 지방산 조성은 메주의 종류에 따라 큰 차이를 나타내지 않았다. 총 유리 아미노산의 함량은 검정콩 캡슐형 메주(1039.70㎎%)가 대두 캡슐형 메주 (556.07㎎%)와 대조구 메주(236.45㎎%) 비하여 각각 2.4배, 4.4배 높았다. In order to improve some problems such as contamination of undersirable mold, mycotoxin production and excessive drying on the surface of traditional meju, we developed a capsule type-meju(CM) coated with steamed black bean and Aspergillus oryzae - rice koji(0.3%, w/w) mixture to surface of traditional meju and fermented at 25℃ for 14 days under 80% relative hunmidity. Contamination of undersirable mold on the surface of CM was not detected within 2 weeks and some genus Penicillium molds on control meju without koji were found naturally after 12 days of fermentation. The moisture content of meju was showed to be in the range of 34.7 - 29.4% being 32.7(w/w) of mean value. Titratable acidities in CMs prepared with black bean(BCM) and soybean(SCM) were much higher than that in control meju, and BCM was similar to SCM. Free sugar content in BCM(123.98 ㎎%) was 10 times and 2.1 times higher than that in control meju(15.02 ㎎%) and SCM(59.85㎎%), respectively. Amino type nitrogen content in control meju was 147.00 ㎎% and its content in BCM(255.50㎎%) was 1.37 times higher than that in SCM(187.25 mg%). Total organic acid content in BCM(95.98㎎%) and SCM(119.98㎎%) were much higher than that in control meju(26.44 ㎎%), and then latic and malic acid contents were markedly changed according to capsulation of meju. Lightness value(l) of Hunter color index was much higher in BCM than in SCM. Fatty acid composition of CM was not different as compared to control meju. Total free amino acid content in BCM(1039.70 ㎎%) was 4.4 times and 2.4 times higher than that in control meju(236.45 ㎎%) and SCM(556.07 ㎎%), respectively.

수술로 유도된 관절원판의 전방변위시 하악과두 관절연골의 Proteoglycan과 결합단백의 변화에 대한 연구

최원석 대한 두개하악 장애학회 1997 대한두개하악장애학회지 Vol.9 No.1

The purpose of this study was to test the hypothesis that surgical induction of anterior disc displacement(ADD) in the rabbit craniomandibular joints(CMJ) will lead to degenerative osteoarthritic changes in the articular cartilage of the rabbit mandibular condyle by analyzing alterations of proteoglycan molecules and link protein. The quantities of cartilage proteoglycans such as chondrooitin-4-sulfate(C4S), chondroitin-6-sulfate(C6S), keratan sulfate(KS) and link protein(LP) were measured using immunogold labeling technique at the electron microscopic level. The right joint of each of five rabbits was exposed surgically, and all discal attachments were severed except for the posterior attachment. The disc was then displaced anteriorly and sutured to the zygomatic arch. The left joint served as a sham-operated control. Ten additional joints were used as non-operated controls. Deeply anesthetized rabbits were perfused with 2% buffered formalin two weeks after surgery. The mandibular condyles were excised and decalcified in ethylenediaminetetraacetic acid(EDTA). Water-soluble plastic embedded sections were incubated in monoclonal antibuodies directed against C4S, C6S, KS and LP. After incubation in the appropriated colloidal gold conjugated secondary antibodies, tissue sections were studied with electron microscope. The results of the immunocytochemistry using colloidal gold conjugates at the electron microscopic level showed statistically significant declines in C4S, C6S, KS, LP (p<0.05) in the osteoarthritic cartilage. It is concluded that surgical induction of ADD in the rabbit CMJ leads to alterations of the proteoglycan molecules in the articular cartilage of the mandibular condyle similar to those described previously in human ADD and in osteoarthritis of other synovial joints. The results of this study provide evidence that the loss of the shock absorber function of the disc, and the exposure of the condyles to overloading may cause the injured chondrocytes to secrete degenerative cytokines as indicated by the loss of proteoglycans and LP. These molecular changes are expressed at the subcellular and cellular levels as osteoarthritis or degenerative joint disease.

실기간 운영 체제의 성능 평가를 위한 벤치마크 프로그램의 개발

최석원,강희국,박윤용 선문대학교·중소기업기술지원연구소 1998 선문공대 연구/기술 논문집 Vol.3 No.1