시멘트의 종류에 따른 포스트의 인장강도 및 제거의 난이도에 관한 연구

박정원,노병덕,이정석 大韓齒科保存學會 1997 Restorative Dentistry & Endodontics Vol.22 No.1

연직배수공법의 교란효과의 배수저항에 관한 고찰

박용원,김병일,류태하 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

Vertica1 drain method is being used as effective ground improving technique for soft clay layer with small shear strength and high compressibility. Theoretically, consolidation time of ground can be decreased by decreasing drainage path and increasing well diameter. In reality, however, smear effect due to the drain installation and the well resistance cause consolidation time delay. In this study, we have studied on the inf1uence of the smear effect and the well resistance of vertical drain on the consolidation time. Theories of Barron, Hansbo, Onoue are used in the estimation of the consolidation time and compare the results changing weak layer thickness, diameter ratio of smear zone, coefficient ratio of consolidation with respect to sand drain, paper drain, pack drain, and SCP. In this paper we found that the well resistance has great influence on increasing the consolidation time in paper and pack drain. And sand drain and SCP, the smear effect has great influence on increasing the consolidation time and well resistance effect is negligible.

GIS를 利用한 土地情報시스템構築 方案에 關한 硏究

박병춘,장지원 木浦大學校 工業技術硏究所 1999 工業技術硏究誌 Vol.9 No.-

The land one of elements that consist of the nation, a foundation of all activity to an indivisual and society. This was limited to supply, on the other hand what the demand increase in value for a reality increase in population, development in economy and society the immediate make use of the land in correct and quick. Accordingly so that centering around a map in order to manage integration in use of the land rationally and point to future, the subject local in where yeo-su city, chollanamdo which collected various kinds of information systematically so as to the largest for a various analysis that it has made use of GIS and established the Land Information Management System by input a relation with the land. Above the method must be preceded numerical value cadastral that foundation of the land information, also all information take centering around a land-number into consideration make use of land-number in discernment information in order to standard and correction with computerization for use cooperation reach to a conclusion that it must have found a new system the land.

기관지천식에서의 Mabuterol의 임상효과

박인원,최병휘,허성호 최신의학사 1989 最新醫學 Vol.32 No.3

黃連湯이 CCl4로 유도된 간중독 흰쥐에 미치는 영향

高元島,朴賢俊,尹炳局,鄭成伊,朴宣東 대한본초학회 1999 大韓本草學會誌 Vol.14 No.2

The purpose of this study is to observe the effects of Hwanglyuntang on serum reactions of CCI₄ treated rats. In this study the experimental rats were divided five groups(Normal, Control, Sample A, Sample B and Sample C). Under the same condition Normal group was fed basal diet and water, the Control group was injected with carbon tetrachloride(CCI₄, 0.5㎖/㎏) and fed a basal diet for 2 weeks, the Sample A group was injected with carbon tetrachloride(CCI₄, 0.5㎖/㎏) and fed the Hwanglyuntang extract(10㎖/㎏) for 2 weeks, the Sample B group was fed the Hwanglyuntang extract(10㎖/㎏) for 2 weeks and injected with carbon tetrachloride(CCI₄, 0.5㎖/㎏), the Sample C group was fed on the Hwanglyuntang extract(10㎖/㎏) for 2 weeks. The change in GOT, GPT, γ-GPT, ALP, LDH activity and Bilirubin level in blood serum were preasured. The obtained results are summarized as follows : It was found that GOT, GPT, γ-GPT, ALP LDH activity and Bilirubin levels in the blood serum of the sample groups, as compared with control group, sample group was significantly decreased.

反應性 加熱 蒸着法에 依한 水素化된 非晶質 게르마늄의 電氣的 特性

李原鎭,梁承勳,朴奉斗,羅炳旭 慶北大學校 師範大學 1985 敎育硏究誌 Vol.27 No.-

Reactive thermal evaporation of high purity polycrystalline germanium was carried out in an atmosphere of hydrogen plasma. Deposition temperature (T_s) and hydrogen pressure (P_(H_2)) were proved to be important parameters to determine the electrical properties of samples, as expected, and the optimum T_s was determined as 200℃. Evaporation onto a substrate at 200℃ in an atmosphere of 1 torr hydrogen plasma has been shown to yield a film which shows a low RT conductivity (10^-6Ω^-1㎝^-1) and an activation type conduction (with an activation energy of 0. 38 0. 42eV) in measuring temperature (above RT). And for optimized samples, germanium hydrogen bonds were proved to be stable even after annealing at 400℃.

선인장 양심실 보조장치의 설계 및 임상적용을 위한 평가

민병구,박찬영,최재순,이혁수,황창모,김삼성,윤걸중,김종원,선경,이경갑,정종태,김원곤 제주대학교 인공심장이식연구소 2001 인공심장 연구 Vol.2 No.1

현재 개발되고 있는 맥동형 이식형 인공심장은 완전이식형 인공심장과 좌심실보조장치 뿐이다. 좌심실보조장치를 장착한 환자의 10~15%가 우심실의 보조를 필요로하고 완전이식형 인공심장의 장착을 위해서는 자연심장을 제거해야하는 상황에서 이식형 양심실보조장치에 대한 필요성이 대두되고 있다. 본 연구진은 완전이식형 인공심장으로 개발된 한국형 인공심장을 개선하여 양심 실 보조장치를 개발하였다. 양심실보조장치는 이동형 작동기식 미케니즘을 이용하고 있으며 에너지 변환장치와 감속기로 구성된 작동기와 혈액주머니, 그리고 내장형 제어기로 구성되어 있다. 선인장 펌프로 명명된 KAH350은 캐뉼라의 연결을 위한 커넥터를 포함하여 길이 177mm, 폭 164mm, 높이 67 이고 무게 780g이며 최대 심박출량은 5L/min 이다. 양심실보조장치로 개발된 선인장펌프는 좌심실보조장치로도 응용이 가능하다. 이식적합성과 생체적합성을 평가하기 위하여 좌심실보조장치로 5회, 양싱실보조장치로 6회의 동물실험을 수행하였다. 각각 최장 28일간 생존하였으며 11회의 동물실험중 장치의 결함에 의한 것이 3회 있었는데 이들은 모두 전자장치의 결함과 방수처리문제였다. 현재 이식적합성과 일박출량을 향상시킨 KAH400모델이 개발중이다. The types of pulsatile implantable artificial hearts that are on the way of development and have been developed are totally implantable artificial heart and implantable left ventricular assist device (LVAD). Approximately 10% to 15% of all patients Implanted with wearable VADs have required right heart support with another device. And it is reluctant to patient who should remove his or her own heart to be implanted with total artificial heart. These situations drive the development of implantable bi-ventricular assist device (BVAD). The Korean BVAD was develophed by modifying the moving actuator type Korean artificial heart. This electro-mechanical BVAD comprises actuator including energy converter and reduction gear train, blood sacs, and internal motor and energy controllers. The KAH350 which is named as 'Cactus Pump' is 177mm in length, 164mm in width, and 67mm in thickness including connectors and nuts. The weight and maximum cardiac output of Cactus Pump is 780g and 5L/min, respectively. The Cactus Pump that was developed as BVAD could be used as LVAD by attaching compliance caps on the 2 ports of one ventricle. The animal experiments were undergone 5 times for LVAD, and 6 times for BVAD. The best records were 28 days survival in both applications. There were 3 times of device failure and they were all associated with electrical connection and hermetic sealing. The KAH400 that has improved anatomical fitting characterisitcs and stroke volume is on development.

연약지반 성토사면의 안정해석에 관한 연구

신성호,박용원,김병일 明知大學校 産業技術硏究所 1997 産業技術硏究所論文集 Vol.16 No.-

When structures are constructed on soft ground, the counterplans have to be considered since the ground cylindrical slip failure by embankment, excessive settlement and lateral displacement cause the damage to structures and underground objects. In this study the lateral displacement are compared with the minimum safety factor that is considered by cylindrical slip failure for not-treated ground, Pack Drain treated ground and SCP treated ground. Numerical results show that the design of embankment by lateral displacement criteria is safer than that by safety factor of cylindrical failure. In considered larger than 1.8. when an important structure is designed, allowable lateral displacement for design of embankment has to be considered since every structure has different allowable lateral displacement.

와동의 형태가 상아질과 복합레진 사이의 미세인장결합강도에 미치는 영향

김예미,박정원,이찬영,송윤정,서덕규,노병덕 大韓齒科保存學會 2008 Restorative Dentistry & Endodontics Vol.33 No.5

이 실험의 목적은 동일한 깊이의 상아질에서 제 6세대의 self-etching system을 사용하여 C-factor가 상아질과 복합레진 사이의 미세인장결합강도에 미치는 영향을 알아보는 것이다. 건전한 대구치 80개를 선정하여 와동의 바닥면적은 각각 16㎟로 동일하게 하고 깊이를 조절하여 C-factor가 각각 0.25, 2, 3, 4인 4개의 군으로 나누었다. 각 군별로 총 20개의 치아를 할당하였으며 접착제와 복합레진의 조합에 따라 다시 4개의 소군에 치아 5개씩을 배정하였다. 상아질 접착제는 AQ Bond Plus또는 Xeno III를 사용하였고, 복합레진은 Fantasista또는 Ceram-X mono를 사용하였다. 제조사의 지시대로 상아질 접착제를 도포한 후 60초간 광중합하였다. 24시간 동안 증류수에 보관 후 단면적이 1.0 x 1.01㎟인 복합레진-상아질 beam을 형성하여 1 mm/min의 속도로 미세 인장결합강도를 측정하였다. One-way ANOVA와 Tukey test, 그리고 Pearson correlation test로 통계처리하여 다음과 같은 결과를 얻었다. l. Xeno III와 Ceram-X mono군에서는 C-factor가 증가할수록 미세인장결합강도가 유의하게 감소했으나 (p < 0.05), 나머지 재료군에서 C-factor군간에 미세인장결합강도의 유의한 차이가 없었다. 2. C-factor 3군에서는 AQ Bond Plus와 Fantasista군이 XenoIII와 Ceram-X mono군에 비해 높은 결합력을 보였으나 (p < 0.05), C-factor 0.25군, 2군, 4군에서 4가지 접착제와 수복 레진의 조합 간에 유의한 차이가 없었다. 3. Fantasista군에서 C-factor와 미세인장결합강도 사이에 일정한 상관관계를 발견할 수 없었고, Ceram-X mono군에서 C-factor가 증가할수록 미세인장결합강도가 감소하는 경향을 보였다 (p < 0.05). 이번 연구의 결과로 상아질의 깊이가 동일하고 6세대의 self-etching system을 사용하여 복합레진을 충전하는 경우와동의 C-factor가 수복물의 미세인장결합강도에 크게 영향을 미치지 않음을 알 수 있었다. This study was conducted to evaluate the influence of the C-factor on the bond strength of a 6th generation self-etching system by measuring the microtensile bond strength of four types of restorations classified by different C-factors with an identical depth of dentin. Eighty human molars were divided into four experimental groups, each of which had a C-factor of 0.25, 2, 3 or 4. Each group was then further divided into four subgroups based on the adhesive and composite resin used. The adhesives used for this study were AQ Bond Plus (Sun Medical, Japan) and Xeno III (DENTSPLY, Germany). And composite resins used were Fantasista (Sun Medical, Japan) and Ceram-X mono (DENTSPLY, Germany). The results were then analyzed using one-way ANOVA, a Tukey's test, and a Pearson's correlation test and were as follows. 1. There was no significant difference among C-factor groups with the exception of groups of Xeno III and Ceram-X mono (p < 0.05). 2. There was no significant difference between any of the adhesives and composite resins in groups with C-factor 0.25, 2 and 4. 3. There was no correlation between the change in C-factor and microtensile bond strength in the Fantasista groups. It was concluded that the C-factor of cavities does not have a significant effect on the microtensile bond strength of the restorations when cavities of the same depth of dentin are restored using composite resin in conjunction with the 6th generation self-etching system.

목탄분말의 입자크기가 양파 생육과 토양 이화학성에 미치는 영향

윤봉기,박인진,유영권,허원영,김병운,김용웅 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.3

토양개량용으로 적합한 목탄의 입자크기를 구명하기 위하여 양파 재배 토양에서 참나무 목탄분말과 소나무 목탄분말의 입자크기를 각각 1 ㎜이하, 1~5㎜, 5~10㎜의 3처리로 하여 목탄분말을 500㎏/10a 수준으로 사용하고 2001년에 시험 한 결과는 다음과 같다. 1) 시험에 사용된 목탄의 화학적 특성은 참나무 목탄은 pH10.1, T-N 0.04%, P₂O_(5) 1.63%, K₂O 0.34%이었으며 소나무 목탄은 pH 9.3, T-N 0.24%, P₂O_(5) 2.18%, K₂O 0.33%이었다. 2) 수확기의 양파 생육은 초장 50.0~62.6㎝, 엽수 6.0~6.5매, 줄기직경 11.2~16.4㎜이었으며 1 ㎜이하 크기의 목탄 시용구에서 초장. 염수, 줄기직경 등 생육이 좋았다. 3) 목탄 입자크기에 따른 수량 구성요소는 1 ㎜이하 시용 구에서 구고. 구 직경, 구중 등이 좋았으며 수량도 목탄 입자크기 1 ㎜이하 시용구에서 많았다. 4) 시험후 토양 화학성은 토양 pH 5.9~6.3, OM 14.7~15.5 g ㎏^(-1), CEC 15.6~16.8 c㏖^(+)㎏^(-1), Avail. P₂O_(5) 147~186㎎ ㎏^(-1), Exch. K 0.35~0.41c㏖^(+) ㎏^(-1)으로 시험전 토양에 비하여 OM, CEC가 증가하고 Avail. P₂O_(5), Exch. K의 축적이 경감되었다. 5) 시험후 토양의 물리성은 용적밀도 1.20~l.24g ㎝^(-3), 고상 45.1~46.6%, 공극율 53.4~54.9% 이었으며 목탄 입자크기 1 ㎜이하 시용구에서 좋아지는 경향이었다. 6) 시험후 토양의 미생물상은 세균 64.3~200.4(×10^(5))cfu g^(-1),방선균 26.4~70.3(×10^(5)), 사상균 16.9~186.2(×10³))이었으며 <1㎜, 1~5㎜ 크기의 목탄 시용구에서 세균, 방선균, 사상균이 많은 경향이었다. This experiment was conduct to find out moderating particle size of wood charcoal powder for soil improvement in 2001 year. The wood charcoal material was a black oak and pine. The particle size of wood charcoal was 1㎜ below, 1~5 ㎜ and 5~10 ㎜. An amount of wood charcoal application was 500 ㎏ l0a^(-1), Chemical properties of a black oak charcoal used experiment was pH 10.1, T-N 0.04%, P₂O_5 1.63% and K₂O 0.34%. That of pine charcoal was pH 93, T-N 0.24%, P₂O_(5) 2.18%, K₂O 033%. At harvest stage of onion, plant height was 50.5~62.6㎝. The number of leaf was 6.0~6.5ea. Stem diameter was 11.2~16.4 ㎜. Plant height, the number of leaf and stem diameter of plot treated 1 ㎜ below wood char-coal were be longer, more or bigger than those of any other particle size. Onion height, diameter and weight of plot treated 1 ㎜ below wood charcoal was higher or bigger than that of any other particle size. Yield was similar to yield component. Soil chemical properties of after experiment was pH 5.9~63, OM 14.7~15.5 g ㎏^(-1), CEC 15.6~16.8 c㏖^+ ㎏^(-1), Avail. P₂O_(5) 147~486 mg ㎏^(-1) and Exch. K 035~0.41 c㏖+ ㎏^(-1). OM and CEC was increased than that of before experiment. Avail. P₂O_5 and Exch. K was decreased than that of before experiment. Soil texture after experiment was bulk density 1.20~4.24 g ㎝^(-1), solid phase 45.1~46.6%, porosity 53.4~54.9%. Soil texture was trend to be improved by l㎜ wood charcoal. Soil microflora after experiment bacteria 64.3~200.4(×10^(5))cfu g^(-1) actinomycete 26.4~70.3(×l0^(5))cfu g^(-1) and fungi 16.9~186.2(×10³)cfu g^(-1) Bacteria, actinomycete and fungi was much at plot treated with <1 ㎜, 1~5 ㎜ wood charcoal with out relation to wood charcoal material.