치성 각화낭에서 매복치 동반 여부에 따른 Ki-67 발현 비교

박철우,김도경,안상건,김수관,윤정훈 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1

Odontogenic keratocysts(OKCs) are frequently associated with erupted or impacted tooth. In such instances, the radiographic features simulate those of a dentigerous cyst. The purpose of this study was to evaluate a comparative immunohistochemical expression of Ki-67 as a proliferative marker in the OKC associated with or without impacted tooth. In addition, we have also been investigated with regard to the proliferative activity comparing the unilocular and multilocular varieties of the OKC. The material for this study consisted of thirty-two cases of OKCs (OKC with impacted tooth, n=16; OKC without impacted tooth, n=16) and ten cases of dentigerous cysts as a comparison. The results revealed that the proliferative activity of OKCs with impacted tooth was higher than those of dentigerous cysts. However, there was no correlation between Ki-67 immunoreactivity and association with or without impacted tooth in 32 cases of OKCs. In addition, this present study showed that there was no correlation between the unilocular and multilocular varieties of the OKCs imn proliferative activity.

羅里洞. 白鹿澤 火口內의 植物 分布 調査硏究

都象學,朴壽現 同德女子大學校 1975 同大論叢 Vol.5 No.1

Research of the Plants Distribution in the Na-Ree Dong of Dagelet Island and Baik-Rok Dam of Cheiu Islard. I found out 143 genera, 187 species of plants in the Na-Ree Dong of Dagelet island by four tinges of exploration during the years of 1961 to 1971. From 1957 to 1974 I found out 113 genera, 174 species of plants in Baik-Rok Dam of Cheju Island by five times of exploration and also I had a comparative study of Crater-Plants in Baik-Rok Dam and Na-Ree Dong.

LED를 이용한 복합레진의 광조사시, 중합수축의 속도와 양, 미세경도에 관한 연구

박성호,김수선,조용식,이순영,김도현,장용주,문현승,서정원,노병덕 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.4

This study evaluated the effectiveness of the light emitting diode(LED) units for composite curing. To compare its effectiveness with conventional quartz tungsten halogen (QTH) light curing unit, the microhardness of 2mm composite, Z250, which had been light cured by the LEDs (Ultralume LED2, FreeLight, Developing product D1) or QTH (XL 3000) were compared on the upper and lower surface. One way ANOVA with Tukey and Paired t-test was used at 95% levels of confidence. In addition, the amount of linear polymerization shrinkage was compared between composites which were light cured by QTH or LEDs using a custom-made linimeter in 10s and 60s of light curing, and the amount of linear polymerization shrinkage was compared by one way ANOVA with Tukey. The amount of polymerization shrinkage at 10s was XL3000 > Ultralume 2, 40, 60 > FreeLight, D1 (P<0.05) The amount of polymerization shrinkage at 60s was XL3000 > Ultralume 2, 60 > Ultralume 2, 40 > FreeLight, D1 (P<0.05) The microhardness on the upper and lower surface was as follows; <본문 참조> It was concluded that the LEDs produced lower polymerization shrinkage in 10s and 60s compared with QTH unit. In addition, the microhardness of samples which had been cured with LEDs was lower on the lower surfaces than the upper surfaces whereas there was no difference in QTH cured samples.

GO에 의해 유도된 培養 脊髓感覺神經細胞 독성에 대한 鎭肝熄風湯의 방어효과

박광수,이호승,김인수,강길성,김인규,김인섭,류도곤 한국전통의학연구소 2003 한국전통의학지 Vol.13 No.1

To evaluate the effect of Jingansikpungtang water extract on cultured mouse spinal sensory neuron which was inhibited by glucose oxidase(GO)-induced cytotoxicity, NR assay and TBARS assay for lipid peroxidation were carried out after the cultured mouse spinal sensory neuron were pre-incubated with various concentrations of Jingansikpungtang water extract for 3 hours prior to exposure of GO. GO, a oxygen radical, decreased the survival rate of the cultured mouse spinal sensory neuron cells on NR assay. Jingansikpungtang water extract have efficacy of decreasing lipid peroxidation increasing by GO in cultured mouse spinal sensory neuron. From above the results, it is concluded that Jingansikpungtang has marked efficacy as a treatment for the damages caused in the GO-mediated oxidative process.

기계시각을 이용한 강구 자동 검사장치

김윤수,박수우,임병훈,김태균,최병재,박철영,이문락,도용태 대구대학교 정보통신연구소 2008 情報通信硏究 Vol.5 No.1

Metal balls are commonly used in mechanical elements and systems including bearings. If there is a defect in a metal ball, it can cause a serious machine failure. By this reason every balls produced are required to be inspected, and the inspection is usually done by human eyes. However, the inspection by human eyes is always with the risk of mistakes, and a need to automate the inspection process is arisen. This paper describes a design of an automatic inspection system for detecting defects on ball surface. A machine vision system is used, and design process and techniques are described in detail. 강구는 베어링을 비롯한 기계 요소 및 장치에서 널리 사용되는 부품이다. 만약 강구에 결함이 있을 시, 이를 사용하는 기계에서 치명적인 결함이 초래될 수 있다. 따라서 제조된 강구에 대해서는 전량검사가 요구되고 있고, 검사과정은 사람의 육안에 의한 검사가 주를 이루고 있다. 그런데 사람에 의한 검사에는 항상 실수의 가능성이 있으므로, 이를 자동화하는 것이 필요하다. 본 논문에서는 강구의 표면 결함을 자동적으로 검사할 수 있는 장치를 설계한다. 기계시각 장치가 사용되었고, 설계에 따른 구체적 절차와 기술들이 서술된다.

β-agarase를 생산하는 해양균의 분리 및 효소 특성연구

김문수,김도만,박혜영,강미화,천종훈 전남대학교 촉매연구소 2000 觸媒硏究 論文集 Vol.21 No.-

An agar degrading bacteria was isolated from the south ocean of Korea and was identified as Aeromonas sp. This strain produced the amount of agarase (1.4U/ml) with agar as a carbon source and casamino acid as a nitrogen source. The optimum concentration of NaCl for both cell growth and enzyme activity was 2.5%. The agarase was purified by DEAE-cellulose and hydroxyapatite column chro-matograpy. The purified agarase showed a single protein band upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) and its molecular weight was estimated to be 50 KDa. The optimal temperature and pH for the enzyme activity were 28℃ and 7.2, respectively. The agarase was stable at pH 6.5 - 8 and 22 - 37℃. The agarase activity was notably inhibited by EDTA, Mn2+, Hg2+, Fe2+ and slightly activated by Na+ and Ba2+.

GPS 측위법을 이용한 차량추종자료 측위방법간 정확성 비교

김도균,이종달,김성훈,정광수,박관 嶺南大學校 工業技術硏究所 2003 工業技術硏究所論文集 Vol.31 No.2

The purpose of this study is to examine GPS data accuracy on traffic behavior analysis and to investigate GPS measurement in the real road condition. This measurement uses GPS hardware and software for collecting speed and position of two model cars at the same time. Data of Disto meter and GPS data which are bases of GPS data value are compared for judging through t-testing and correlation analysis. GPS data is used for calculating car moving distance and speed change. It is useful to traffic control in a city by analyzing basic traffic behavior appeared on leading car and following car.

비정질/다결정규소 적층형 태양전지

김도영,김상수,박용관,이준신 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1

본 연구는 최근의 지상전력 응용을 위한 Metal/a-Si:H(n-i-p)/poly-Si(n-p)/Metal 구조를 가지는 적층형 태양전지를 연구하였다. 이 전지는 두 층의 동종접합이 적층된 전지구조로 구성되었다. 상부는 1.8eV의 큰 에너지 밴드갭을 가지는 n-i-p형 a-Si:H와 하부전지는 1.1eV의 작은 에너지 밴드갭의 다결정 규소 전지의 n-p형 접합이다. 태양전지의 효율 영향요소를 PC-1D 태양전지 모의실험을 통해 조사한후 실제 소자 제작에 적용하였다. 주요 연구 분야는 3가지로 구분되며 첫째는 p-n접합 다결정 규소의 하부 전지, 둘째는 p-i-n접합 수소화 비정질 상부규소, 세 번째로 적층형 전지의 계면층에 대한 영향이다. 하부전지의 효율은 900℃의 전열처리, 표면처리, 0.43㎛의 에미터 두께, 상부 Yb 금속, 7% 정도의 태양전지 그리드 면적으로 향상되었다. 최적화된 전지 공정으로부터 약 16%의 변환효율을 달성하였다. 상부전지는 이온에 의한 박막의 손상이 없고 우수한 p/i-a-Si:H 계면층을 가지는 광-CVD 시스템을 사용하여 성장하였다. 적층형 계면효과는 세가지의 화학적인 표면처리, 열산화에 의한 표면처리, 그리고 Yb 금속의 상태등의 경우를 연구하였다. 열산화막에 의해 표면처리된 전지는 높은 광전류의 생성과 향상된 분광반응도를 보이고 있다. We investigated multi-stacked solar cells with a structure of metal/a-Si:H(n-i-p)/ poly-Si(n-p)/metal for the terrestrial applications. This cell consists of two component cells: a top n-i-p junction a-Si:H cell with wide-bandgap 1.8eV and a bottom n-p junction poly-Si cell with narrow-bandgap 1.1eV. The efficiency influencing factors of the solar cell were investigated in terms of simulations and experiments. Three main topics of the investigated study were the bottom cell with n-p junction poly-Si, the top a-Si:H cell with n-i-p junction, and the interface layer effects of multi-stacked cell. The efficiency of bottom cell was improved with a pretreatment temperature of 900℃, surface polishing, emitter thickness of 0.43μm, top Yb metal, and grid finger shading of 7% coverage. The process optimized cell showed a conversion efficiency about 16%. Top cell was grown by using a photo-C JD system which gave an ion damage free and good p/i-a-Si:H layer interface. The multi-stacked interface effect was examined with three different surface states; a chemical passivation, thermal oxide passivation, and Yb metal. The oxide passivated cell exhibited the higher photocurrent generation and better spectral response.

거대첨규 콘딜로마로부터 속발된 음경암 1치험예 : A Case Report

김수현,정충식,노준,박도영,장대수 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

The giant condyloma or carcinoma-like condylima is relatively rare. Although the disease is considered clinically mailgant. the possiblity of maligant changes from them are controversial even among the investigators but cannot be entirely overlooked. Most authorists consider that they get the possibility of malignant change. A case of malignancy of the penis which have apparently been transformed from giant condyloma acuminatum of the penis is herein presented with review of literature.

유리섬유 폐재가 첨가된 플라이 애쉬계 인공경량골재의 소성특성

김도수,박종현,박병배,노재성 공주대학교 자원재활용신소재지역협력센터 2000 2차년도 센터 사업 성과집 Vol.2000 No.1

The lightweight aggregate was artificially pelletized, with use of fly ash, obtained from coal power plant, and waste glass wool as a flux, by sintering process in electrical muffle furnace. Those were fired at 1,000℃ and 1,100℃ for 3 and 6 minutes respectively. IDT(Initial Deformation Temperature) of fly ash, was appeared 1,360℃, but fly ash, when mixed with 50wt% of waste glass wool and 5wt% borax as fluxes, came into 1,156℃. Absorption ratios of sintered pellets for 24hrs had the lower values in the range of 4.3 to 6.3% than 16.8% of ILA(imported lightweight aggregate). Increasing of sintering temperature and time, absolute dry specific gravity of sintered pellet tended upward. Absolute dry specific gravity of pellet sintered at 1,000℃ for 3 minutes was 1.36 and this value was similar to that of ILA. SEM showed that the fractured surface of pellet, sintered at 1,000℃, had more fused phases in outer region rather than inner. It was shown, however, that the pellet, sintered at total pore surface was increased because large pores transfer into small pores by increasing sintering temperature.