• 대한한의학회지
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• 제25권2호
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• pp.9-21
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• 2004

Objectives : To evaluate the anti-tumor and synergic effect of Bojungikkeehapdaechilki-tang (BJDC) with doxorubicin. Methods : The inhibitory concentration (IC), $IC_{50}{\;}and{\;}IC_{90}$ of single use of doxorubicin and BIDC with their concomitant treatment against Colon-26 (murine rectum carcinoma) cell line were observed using MTT (microculture tetrazolium test) assay. In addition, their anti-tumor effects were also observed in xenograft nude mice models against Colon-26 cell line. Results : BJDC had only minimal direct anti-tumor effect against Colon-26 cell line but it reduced general depressed signs induced by implantation of the tumor cell lines and increased the total WBC and lymphocyte numbers. Conclusions : It is considered or expected that BJDC extract is reducing the critical toxicity of doxorubicin and has favorable synergic anti-tumor effect when administered conconitently with doxorubicin.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.482-486
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• 1995

Generally, a great deal of attention is given to the maintenance of consistent surface roughness. Therefore one of the major goals of research in this area has been the development of models which can predict the surface roughness obtainable on a machined metal part over the simultaneous variation of cutting condition. A comparison is also made between the theoretical and actual values of surface roughness to calculate the overall variance in the developed models, Mathematical models developed from the experimental data in the course of this work can be employed to control the cutting conditions in order to achieve the desired surface roughness and deep quality.

• 한국가구학회지
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• 제27권4호
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• pp.375-382
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• 2016

This study focuses on the shape of the bottle, the Chinese Qing Dynasty porcelain decoration. Consideration given to understand the basic form of the catheter, and the basic division. To study the binding form to the principles of the design work to prepare a lacquer on the basis of the results obtained here. When classified by type illness Qing Dynasty porcelain decorative porcelain six types, semi-porcelain could be classified into five types. Production form to pursue work in this study design is produced in the form of asymmetrical vases object type curve. These bottles of Qing Dynasty porcelain for decoration. The basic type of pottery types and selected six of its basic and applied work. Production design work was produced Hyupjeotae production techniques that facilitate formative representation.

• 보존과학회지
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• 제5권2호
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• pp.25-34
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• 1996

The essential point to be considered when restoring lacquered ware is to know its materials and properties, and prior studios from the conservational and scientific examination is the way to achieve it. Recently, to get a close examination of its materials and methods involved in lacquered ware making, cross section microscope studies are being applied. Cross section microscope studies shows that lacquering process has been simplified and that bone and earth substances have been added to the materials, a method also traced from the lacquered wooden coffin excavated from the 'Nak Rang Tomb' and by the lacquered wares of the 'Kyongjoo An Ap' areas. The significance of this Chosun Dynasty lacquered wares's inlaid with mother-of pearl restoration can be found in that we have been able to harmonize the very traditional and the very modern scientific method of our time and that we were able to launch a step forward from using only the synthetics to open up a new range of natural materials such as lacquers, bone and earth substances, oxhide-glue and nacres and of referring to the traditional methods.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2002년도 춘계학술대회논문집
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• pp.151-155
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• 2002

Memory의 공정기간은 2∼3개월 정도, 공정은 수백가지에 이를 정도로 많기에 defect은 존재할 수밖에 없다. 많은 defect이 있다면 어쩔 수 없겠지만 적은 defect이 발생한 경우에는 해당 die를 reject시키는 것보다는 repair해서 사용하는 것이 memory생산 업체 입장에서는 보다 효율적이고 원가 절감 차원에서 필수적이다. 이와 같은 이유로 laser repair라는 공정이 필요하고 laser repair공정의 정확한 target을 설정하기 위해 redundancy analysis가 필요하게 되었다. 지금까지 redundancy analysis는 장비 개발 업체에서 제공하는 경우가 대부분 이었고 각 장비 제조 업체별로 redundancy analysis algorithm을 개발하여 제공하여왔기에 동일한 defect 유형에 분석하는 redundancy analysis time이 각 장비 업체 별로 다른 경우가 대부분이었다. 이에 본 연구에서는 기존의 redundancy analysis algorithm의 개념에서 벗어나 defect 유형별로 simulation한 후 redundancy analysis를 진행함으로써 redundancy analysis에 소요되는 시간을 절약함으로써 원가 경쟁력 강화를 하고 correlation 개념을 업무에 적용하는데 목적이 있다

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.827-831
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• 1997

Conductive veramic matrix composite(CMC) workpiece of TiC 33%/Al /sab 2/O /sab 3/ 66% Y /sab 2/ O /sab 3/ was machined by die sinking electrical discharge machining(EDM) according to different pulse duration and suty factor for reverse polarity of electrode. Material removal rate(MRR) was examined by process under various operating conditions. The surface morphology was evaluated by surface roughness values and scanning electron microscopy(SEM) research. The more MRR was obtained according to increase pulse duration and duty factor. Also the maximum surface roughness(Rmax) of EDMed surface was slightly changed with increased pulse duration and duty factor. The SEM photographs of EDMed surface showed wide recast wide recast distribution region of melting materials in purse duration 0.130(ms) than 0.048(ms).

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
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• pp.180-182
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• 2001

기존의 디지털 계전기 교육/훈련 방법은 적절한 교육용 소프트웨어 및 기기의 부재로 인해 교육을 받는 훈련생들을 단기간 내에 이해시키는데 어려움이 있었다. 본 연구의 목적은 GUI 환경에서 다양한 모의 고장 발생, 모의 고장 시나리오의 입력, 편집 수정, 삭제가 가능하고 디지털 계전기의 교육/훈련 기능과 함께 훈련 결과의 평가와 훈련일지의 작성 기능을 포함하는 디지털 계전기 시뮬레이터의 개발이다. 본 논문에서는 고장종류, 고장발생 각, 고장거리, 데이터의 샘플수에 따라 EMTP를 이용하여 모의한 후, 디지털 신호 처리를 이용하여 직류 성분과 고조파 성분을 제거하고, 기본파 성분을 추출한다. 그리고 추출된 데이터를 사용하여 임피던스 궤적을 도시하고. 그 결과를 사용자에게 보여주도록 하였다. 특히, GUI 환경으로 구성하여 알고리즘의 수행과정을 보다 쉽게 이해하고. 사용할 수 있도록 함으로써, 교육/훈련의 효과가 극대화되도록 하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(2)
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• pp.41-44
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• 2002

The Semiconductor Industrial are developed after 1940. It was called “Rice of Industrial”. It needs great effect in Electronics. It was developed highly in recent several years with semiconductor manufacturing equipments. Semiconductor manufacturing devices are developed “In-line” type in the first stage. But It was non-effective in modem many type process. Because this reason, Cluster type manufacturing equipments are proposed. Cluster have ability of many-type-process and effective-scheduling by circular type process chamber In this paper. we propose a real-time 3D monitoring and simulation of this semiconductor manufacturing equipments. By proposed monitoring method, we have capability real visual maintanance & virtual simulation. This effective visual 3D monitoring could apply another dangerous environment in entire industrial.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.489-493
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• 2000

Turbine blade has trouble of cracking at root region. Fracture surface of blade root is surveyed by SEM and AFM to clear relation between fracture mechanical parameter and surface parameter (striation width and surface roughness). Service stress is predicted by maximum height roughness $R_{max}$, on fractured surface and stress analysis on turbine blade. It is to thought that turbine blade is fractured by abnormal condition such as incorrect fittings between pin and pin hole but isn't fractured by normal service conditions such as steam pressure, centrifugal force and torsional force.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.875-878
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• 1997

Electrical discharge machining is the method of using thermal energy by electrical discharge. Generally, if the material of workpiece has conductivity even though it is very hard material and complicated shape which are difficult to cut such as quenching steel, cemented carbide, diamond and conductive ceramics, the EDM is favorable one of possible machining processes. But, the process is necessarily required of finish cut and heat treatment because of slow cutting speed, no mirror surface, brittleness and crack due to the residual stress for manufactured goods.