肝吸蟲症에 있어서 Praziquantel 投與 前後의 抗體價變動에 관한 硏究

李權海,嚴基善,林漢鍾 고려대학교 의과대학 1986 고려대 의대 잡지 Vol.23 No.3

The changes of antibody to adult worm of Clonorchis sinensis were studied using ELISA before and after treatment. Sera from 93 cases of confirmed human clonorchiasis were examined before treatment and at six months after treatment with a single dose of praziquantel 40 mg/kg bwt. Serum IgG level against C. sinensis (mean absorbance values at 488 nm) of 30 healthy controls from non-endemic area were 0.202±0.099, Sera of clonorchiasis patients showed significantly higher level of serum IgG (1.397±0.583) before treatment comparing with those of healthy controls. At after treatment the IgG levels were lower (0,858±0.408) than those of before treatment. At before treatment, the serum IgG level was highest in the group of very heavy infection (1.937±1.428), followed by heavy (1.860±0.297), moderate (1.491±0.579) and light (1.109±0.507) infection. The serum IgG level decreased significantly in heavy infection group (1.015±0.448) and in very heavy infection group (1.143 0.506) after treatment, then followed by moderate infection group (0.849±0.412) and light infection group (0.753±0.341). The egg discharge of thirty four out of ninty three clonorchiasis patients was negatively converted in stool examination and showed much decreased serum IgG level (0.718±0.356) as well as in the egg reducted fifty nine patients (0.943± 0.409). And the high antibody level groups showing the absorbance value higher than 1.50 (n=45) revealed more significant decrease of serum IgG level after treatment than the low antibody level group with less than 1.50. Conclusively, it was observed that serum specific IgG level was decreased at six months after treatment and the decreasing tendancy was more significant in higher E.P.G. group.

GPS주행자료를 이용한 퍼지형 자동운전 알고리즘 개발

이종달,배건환,권기욱,이영욱 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1

So as to develop an automatic driving model for ITS, 4 driving courses have been set up to examine the reasonable driving pattern of experienced drivers who are using GPS driving data. The Sugeno-type fuzzy model was constructed by inputting the actually measured driving data, and its suitability was examined.

흙의 파괴시 체적변화 효과

정진섭,권영언,김찬기,이종천 圓光大學校 1993 論文集 Vol.27 No.2

본 연구는 흙이 파괴할 때 전단에 의하여 발생 하는 채적변화에 의한 응력을 보정하는 세개의 방정식을 유도하여 문헌상에서 얻은 시험결과에 적응하여 본 결과 Bishop의 에너지를 고려한 보정방법이 가장 합리적인 것으로 생각되어 Bishop의 방법을 선택하여, 흙이 항복 및 파괴 할 때에 채적변화에 대한 응력보정의 효과를 Poorooshasb모델과 Lade모델에서 검토하였다. 그 결과 전단할 때 채적변화에 대한 응력보정은 흙의 파괴상태를 합리적으로 나타내지 못한다는 사실을 알았다. The effect of volume change at failure and equations worked out to aollow for their contribution to the stresses. Two models for the failure and yield of soil are discussed in this paper and the effects of the corrections are considered in these models. The corrections for volume change do not produce a reasonable change in the stresses. They do not make the task of modeling the soil any simpler, and so not nessecery for consideration. The best method developed so far, describing the failure of the soil is Lade`s model. It describes the failure of the soil very well without volume correction. In fact when volume corrections are applied, the model no longer describes the failure. Poorooshasb`s model, though base on much consideration does not describe the true failure of the soil.

외배엽 이형성증 환자의 임상적 치험례

오소희,권순원,김종수,김용기,임헌송 대한소아치과학회 2000 大韓小兒齒科學會誌 Vol.27 No.2

Ectodermal dysplasia(외배엽 이형성증)은 외배엽성 기관에 한가지 이상의 선천적 이상소견을 특징으로 하는 질환이다. Ectodermal dysplasia는 약 120종류 이상이 보고되고 있고, 이 중 Hypohidrotic ectodermal dysplasia가 가장 잘 알려져 있으며 이는 성염색체 열성인자에 의해 유전되며 남성에서 호발한다고 한다. 임상증상으로는 무한증, 감모증, 무치증 혹은 핍지증이 가장 특징적이다. 이외에도 무피지증, 손톱이형성증, 가늘고 성긴 머리카락, 두드러진 이마, 안장코, 돌출된 안와상부, 입술의 돌출과 함께 피부가 건조하고 땀샘이 결핍되어 있어서 더위를 참지 못하고 발열이 일어나기 쉽다. 본 증례의 환자는 단국대학교 치과병원 소아치과에 내원한 6세 6개월된 남아로써 무치증을 보이는 Hypohidrotic ectodermal dysplasia로 진단되었고 환자의 심미적, 기능적 결함을 해소하기 위해 총의치로 치료를 시행하는 동안 다소의 지견을 얻어 이를 보고하는 바이다. 주요어 : 외배엽 이형성증, 무치증, 총의치

河川調査를 위한 GIS 및 GPS 應用

강창모,권기욱,이종달 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

This study deals with the techniques of Geographic Information Systems(GIS) and Global Positioning Systems(GPS) which belong to relatively new survey techniques related both the possibilities of their use and the limits of their application. Especially, it tried to build the maintenance management of river and applied LANDSAT data to use landuse data for hydrology analysis. It is important that our nation's geoid model is established immediately by means of the result of it. And if it will be carried, we can survey river with GPS. Also, the integral data of GIS and LANDSAT can be really useful for suveying, the maintenance management of river.

몇가지 작물중 침투성 살충제 Carbofuran의 잔류량 분석

이재구,최신종,경기성,안기창,권정욱 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-

In order to ascertain the safety of the systemic insecticide carbofuran - treated crops. garlic, peanut and potato were collected randomly from markets near the major producing farms and analyzed for the residues of carbofuran and its main metabolite, 3-hydroxycarbofuran. The in vitro metabolism of carbofuran in phosphate buffer extracts of the crops was investigated. The results obtained were as follows. 1.The recoveries of carbofuran and 3- hydroxycarbofuran from the spiked samples were 92~ 100% in all samples. The detection limit and minimum amount of carbofuran detected were 0.02ppm and 0.1ng, and those of 3-hydroxycarbofuran 0.06ppm and 0.3ng, respectively. 2.Two mature garlic samples out of 20 contained 0.13 and 0.07ppm of carbofuran, respectively, showing a detection frequancy of 10%. The residue level was less than the maximum residue limit(0.5ppm) set by the health authorities in Korea. Only one mature garlic sample out of 20 contained 0.13ppm of 3-hydroxycarbofuran. 3.The residues of carbofuran and 3-hydroxycarbofuran in the immature garlic, peanut and potato samples were less than the detection limits. 4.The application of carbofuran to the fields of garlic, peanut and potato would be safe, considering that the estimated maximum acceptable daily intake of carbofuran from garlic was 0.0007mg which is 0.13% of the maximum acceptable daily intake(0.55mg) . 5.Carbofuran was hydrolyzed in vitro mainly to carbofuran phenol(m/z 164) in phosphate buffer extracts of the three crops in contrast to the major oxidative metabolism in situ. The amount of the metabolite increased with the incubation time.

스트레인 게이지법을 이용한 복합레진과 컴포머의 중합수축 평가에 관한 연구

김윤철,김종수,권순원,김용기 大韓小兒齒科學會 2002 大韓小兒齒科學會誌 Vol.29 No.1

본 연구의 목적은 다양한 중합과정에 따른 복합레진과 컴포머의 수축 양상을 스트레인 게이지법(strain gauge method)을 이용하여 평가해보고자 하는 것이었다. 광중합기는 기존의 할로겐 시스템인 XL 3000(3M, USA)과 최근 소개된 plasma arc curing 시스템인 Flipo(LOKKI, France)를 사용하였고, 충전 재료는 복합레진인 Z-100(3M, USA)과 컴포머인 Dyract AP(Dentsply, Germany)를 사용하였다. 주형과 치아 와동 내에 충전된 실험재료의 중합수축을 각각 측정하였으며, 만능 시험기를 이용하여 압축강도를 측정하였다. 중합수축 측정 결과 모두 중합 초기에는 일시적인 재료의 팽창을 나타냈고, 그 후 약 1분간은 수축량이 급격히 증가하다가 증가의 폭이 점차 감소하는 양상을 보였다. 전반적으로 컴포머를 사용한 군에 비해 복합레진을 사용한 군에서 중합수축이 크게 나타났으며, plasma arc curing 시스템을 사용한 군에 비해 기존의 광조사 시스템 군에서 더 큰 중합수축을 보였다. 압축강도의 측정결과는 컴포머 군에 비해 복합레진 군에서 크게 나타났다. 이상의 결과를 종합해 볼 때, plasma arc curing unit와 컴포머의 사용은 시술시간의 단축과 항우식 효과를 감안한다면 소아치과 영역에서의 사용이 긍정적으로 고려될 수 있다고 생각된다. The purpose of this study was to compare the polymerization shrinkage and the compressive strength of composite and compomer cured with two different light sources; conventional halogen-light curing unit and recently developed plasma arc curing unit. The 'strain gauge method' was used for determination of polymerization shrinkage and the compressive strength was measured by universal testing machine. The results of the present study can be summarized as follows: 1. Filling materials in polyethylene molds showed the initial expansion in the early phase of polymerization. This was followed by the rapid contraction in volume during the first 60 seconds and gradually diminished as curing process continued. 2. The polymerization shrinkage in tooth samples was generally lower than in the mold samples. 3. The generally lower amount of linear polymerization shrinkage was observed in compomer and plasma arc curing unit group when compared to composite and conventional curing unit. 4. The higher compressive strength values was found in composite groups reagrdless curing methods. The results of this study strongly support the application of plasma are system and fluoride-containing compomer in the field of clinical pediatric dentistry claiming its effectiveness in curing the esthetic dental materials and the anticariogenic capacity.

상아질 결합제가 컴포머의 불소유리에 미치는 영향에 관한 연구

윤여상,김종수,권순원,김용기 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.2

본 연구의 목적은 와동 충전시 충전재와 지질 사이에 개재되는 상아질 결합제가, 수복물에서 유리되는 불소가 와동 벽으로 침투하는 과정에 어떠한 영향을 주는지를 조사함이었고, 부가적으로 레진 강화형-글라스 아이오노머 시멘트의 접착에도 상아질 결합제를 도포하는 것이 체질과의 결합력을 강화시킬 수 있는지에 대해 평가하고자 하였다. Fuji II LCR와 Dyract APR를 선정하여 상아질 결합제의 도포 여부에 따른 불소 유리량 측정과 전단 결합 강도도를 비교분석하였으며, 치질 내로의 불소 침투 양상은 교환 시기에 있는 재2유구지에 Fuji II LCR와 Dyract APR를 충전하고 3주내에 발거하여 EPMA필 분석하였다. 상아질 결합제는 불소 유리량을 현저하게 감소시키는 것으로 나타났으며(p<0.05) Fuji II LCR의 경우 상아질 결합제의 도포가 결합강도를 증가시키지 못하였다. EPMA분석결과 상아질 결합제는 충전재로부터 유리되어 나오는 불소가 치질 내로 확산되는 것을 방해하는 것으로 확인되었다. It is well known that glass-ionomer cement and compomer can release fluoride which can inhibit the progresion of dental caries. The purposes of thins study were to evaluate whether the fluoride from fluoride-containing ailing materials can penetrate the dentin bonding adhesive and the dentin bonding adhesive can increase the bond strength of resin-modified glass lonomer. The amount of fluoride release from resin-modified glass lonomer and compomer was measured during 28 days of period find statistically analyzed by t-test. The bond strength of each material with/without dentin bonding adhesive was measured and also statistically analyzed by t-test. The distribution of fluoride from each material into the tooth was explored by electron probe microanalysis system (EPMA). The expenmental teeth used were second primary molars about to exfoliate. The amount of fluoride from each material was diminished by dentin bonding adhesive during 28 days(p<0.05) and the bond strength was not increased by dentin adhesive in resin-modified glass ionomer. The bond strength of group VI was not detectable. The distribution of fluoride from earth material into teeth was according to dentino-enamel junction and dispersed into pulp from pulpal floor. The widest distribution was shown in resin-modified glass ionomer cement filled without the application of dentin bonding adhesive.

Low Temperature Two-Step Atomic Layer Deposition of Tantalum Nitride for Cu Diffusion Barrier

Kwon, Jung-Dae,Jeong, Seong-Jun,Kang, Jae-Wook,Kim, Do-Geun,Kim, Jong-Kuk,Rha, Jong-Joo,Nam, Kee-Seok,Kwon, Se-hun The Electrochemical Society 2009 Journal of the Electrochemical Society Vol.156 No.11

6ㆍ7세기 중국불교의 흐름

권기종(Kee-Jong Kwon) 한국불교연구원 2005 불교연구 Vol.23 No.-

  The 6th and 7th centuries are considered as a settlement period for Chinese Buddhism. At this time, Chinese Budd hism was born and its unique doctrines had been develope d. It is not much to say that this is the most decisive era for Chinese Buddhism due to the important events and cha nges occured at that time.   However, this study mostly has a look on the denominati ons in the period of North and South Dynasties and Su(隋) and Dang(唐) Dynasties. Hence it"s inevitable not studying many denominations such as Satyasiddhi school, Sanlun sch ool, Tientai school, and Seon school. Especially in the case of S?n school, it is difficult to be studied seperately becau se much more developments and changes happened afterw ard.   As the Buddhism, which was originally born in India, sett led in China, both Indian culture and Chinese culture had merged together. During this merger there were a lot of at tempts and risks, so it is not right judging only by its resu lt. Those attempts and risks themselves are developments and outcomes.   Different from India, Buddhism needed different relations hip with the government power in the strongly centralized and authoritarian ancient Chinese Dynasties.   Chinese governments sometimes fully supported and som etimes forcefully suppressed this highly developed religion of Buddhism. Through these repetitions the religion had st abilized and expanded.   The reason why the Chinese Buddhism could continuousl y change its colors must have been the efforts of the sutr a translating monks, and the enlightment searching monks. They kept supplying and experimenting on new marasikara through collecting and translating Dharma-Sh?stra.   This brought not only theoritical development of Buddhis m but also new form of the religion and its discipline. The new translated Dharma-Sh?stra and the experiments of ma nasikara bore unique understand on Buddhism, moreover it became sects of Buddhism.   The various characteristics of Buddhism of Su and Dang Dynasties can be explaned in this way. Buddhism does not contain only doctrines and ascetic practices. Its the most i mportant appointed task is liberating sentient beings. The p opularizing movement of Buddhism was based on this conc ept. The apperance of Triloka can be a good example.   The Chinese Buddhism on the 6th and 7th centuries sho ws several possibilities of Buddhism at once.