• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.115-115
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• 2004

최근에는 자동차용 범퍼(Bumper), 인판넬(In-panel), 도어판넬(Door panel), 도어가니쉬(Door Garnish) 등과 같은 대형 사출성형품을 성형하기 위한 금형설계에 핫 러너 시스템(Hot Runner System)에 밸브 게이트(Valve Gate)를 채용한 밸브 게이트 시스템을 많이 사용하고 있다 이 시스템을 사용함으로서 성형 싸이클타임의 단축, 수지 스크랩의 감소 등의 말은 장점이 있으나, 실제 성형작업 적용 시 밸브 게이트의 작동순서 및 개폐시간의 제어 등에 정확한 표준이 없어 시험 사출시 최적 성형조건의 셋팅이 많은 시간을 소모하고 있는 문제점이 있다.(중략)

• Journal of Intelligence and Information Systems
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• v.2 no.1
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• pp.1-9
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• 1996

사출 성형의 초보자도 이용할 수 있으며 사출 성형기의 이력 관리를 할 수 있는, 플라스틱 사출 성형의 진단과 불량대책을 위한 지식 기반 전문가 시스템을 ATR-IM 이라는 범용 전문가시스템 쉘을 이용하여 구현하였다. 지식베이스(knowledge base)는 수지 회사와 관련 서적, 전문가의 경험을 토대로 구축하였으며, 구현된 시스템은 크게 사출 공정 조건 설정 시스템, 사출기 ID에 따른 이력 관리 시스템, 사출성형 불량진단 시스템의 세부분으로 나누어 구성하였다. 본 연구를 통해 제안된 방법에 따라 업체별 사출기 성능에서 오는 공정 조건값의 차이를 사출공정 조건값의 저장에 의해 고려할 수 있으며, 불량 해결에 대한 전문가시스템이 추론 순서 결정을 경험적 확률에 따라 이루어지도록 함으로써 현장에서의 작업 환경을 고려한 전문가시스템이 되도록 하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.22-25
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• 2010

재구성형 프로세서는 파워를 적게 사용하면서도 높은 성능을 낼 수 있는 프로세서이다. 재구성형 프로세서는 하드웨어에 최대한 많은 계산 자원을 넣으면서도 구조를 최대한 간단하게 하여 저전력 소모와 고성능을 동시에 추구하였다. 하지만 구조를 최대한 간단히 하는 과정에서 프로그램의 수행을 관리하는 많은 하드웨어 로직이 빠지게 되었는데, 이 부분은 컴파일러에서 코드를 생성할 때 스케쥴링과 수행 순서까지 정해지도록 소프트웨어적 관점에서 처리하기로 하였다. 이를 사용하기 위해 컴파일러는 입력된 프로그램을 분석하고 재구성형 프로세서에서 수행될 수 있는 형태로 코드를 각 계산자원에 매핑하는 작업을 수행해 주어야 한다. 재구성형 프로세서의 레지스터는 이 매핑 과정에서 데이터의 전달을 위해서 주로 사용되게 된다. 이 논문에서는 다양한 멀티미디어 응용 프로그램을 사용하여 멀티미디어 환경에서 재구성형 프로세서가 사용될 때 레지스터 개수가 성능에 미치는 영향을 제시한다.

• Composites Research
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• v.30 no.6
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• pp.410-415
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• 2017

This paper predicted deformation due to thermal residual stress in composites using finite element analysis. Temperature cycle, Model shape, Laminate angle, Stacking sequence, chemical shrinkage of resin, and thermal expansion are affect composite deformation. Compare the results of the analytical model with the actual model of the same shape. This paper suggests that the analytical results can be applied to actual Model.

• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.1
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• pp.190-198
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• 1989

Some Developments in computer aided procedures for cold forging process and tool design of rotationally symmetric cup shape parts are described. The developed system enables appropriate forging sequence to be determined automatically, together with details of corresponding preform, die and punch design. The computer program developed is interactive and written in BASIC. This system not only assist the heavy work of designers but greatly shorten the time of design.

• Korean Journal of Psychosomatic Medicine
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• v.7 no.1
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• pp.3-9
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• 1999

Abnormal external appearance may cause psychiatric trauma or problem in social adaption. The plastic surgeons should consider the patient's quality of life, and their roles are correcting psychiatric and emotional trauma as well as external appearance which help the patient adapting social life. Because the patients in plastic surgery have higher level of expectation for the result of their operation, it is necessary for the surgeons to explain precisely the procedure and possible complications precisely at preoperative meeting and to maintain the good doctor-patient relationship at postoperative follow-up period. In case if the patient dissatisfy the postoperative result, it is recommended to listen the second opinion from another plastic surgeon. If the patient still dissatisfy, then the patient should be consulted to psychiatrist.

• Journal of the Korea Convergence Society
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• v.2 no.2
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• pp.27-34
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• 2011

This study is making a product for the development of one process worm wheel of making a shape for gear for worm wheel without hobbing manufacturing process. Because of removing a hobbing process, plastic worm wheel for increased productivity and equivalent quality is produced in the result. As the result, this product is selling to Hyundai Mobis, Mando, TRW, KOYO/NSK/Showa(Japan), Delphai(America). The core technology and different strategy are as follows. The technology protection for molding of worm whee is currently patent process "Molding process of helical gear(No. 10-2008-0105908). Further patent procedure for "molding system for positioning decision of inserting boss is currently prepared. As gear molding procedure in hobbing machine without gear machining procedure, most of all, core development technology which is making a gear tooth is main topic. So that, in case of currently developed worm wheel, because core and mold base are not developed in the first procedure, gear is machining in hobbing M/C as the second procedure. In the later, patent for mold base structure will be prepared in this study results.

• Korean Journal of Food Science and Technology
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• v.41 no.5
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• pp.566-571
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• 2009

The principal objective of this study was to use a fermentation and extrusion process in order to improve the antioxidant properties of original Sangmaksan (ES), containing maekmoondong, omija, and white ginseng. The antioxidant activities of fermented Sangmaksan prepared with different types of ginseng [white (FSW), red (FSR), and extruded white (FSE)], were investigated. The white ginseng powder was extruded at 20% moisture content and $120^{\circ}C$ of the maximum process temperature at the barrel. The antioxidant properties of Sangmaksan were increased after fermentation. Interestingly, the fermented Sangmaksan containing the extruded white ginseng evidenced more potent antioxidant properties than the fermented Sangmaksan containing white ginseng. The content of total phenolic compounds, DPPH-radical scavenging activity, acidic polysaccharide, reducing power, and total anthocyanin were highest with FSR, followed by FSE, FSW and ES, respectively. Additionally, superoxide dismutase-like activity and total flavonoid contents were highest in the fermented Sangmaksan containing extruded white ginseng. In conclusion, it can be asserted that the fermentation and extrusion process utilized in this study may prove to be an effective new process for the production of high-quality Sangmaksan.

• The Korean Journal of Food And Nutrition
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• v.10 no.2
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• pp.234-240
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• 1997

Agar has widely been used as medical aids and food ingredients due to its pecular physicochemical and rheological properties. In this paper, the effects of spray drying and extrusion drying on functional properties of agar were investigated to clarify the sol-gel transition mechanism at low temperature and microstructure of agar gel by measuring phase transition by differential scanning calorimetery, structural differences by light microscope and scanning electron microscope observation. The lowest endothermic onset(To), peak(Tp), conclusion(Tc) temperature and enthalpy($\Delta$H) using differential scanning calorimetery were showed in extrusion-dried agar wic were checked in 41.30, 61.72, 80.50 and 0.73cal/g. In cases of unmodified and spray-dried, the values were 81.20, 95.51, 112.14 and 3.22cal/g, and 60.11, 76.45, 89.54 and 1.53cal/g, respectively. When all samples were reheated using differential scanning calorimetery after gelling fully, no significant differences of endothermic To, Tp, Tc and $\Delta$H appeared. The surface structure of unmodified agar powder observed by light microscope and scanning electron microscope appeared a continuous surface without any indication of small pores, gaps or point of discontinuity. In cases of spray-dried agar, the unstable structures with pores was resulted. The microstructures of extrusion-dried agar, however, was solid with large gaps and areas of discontinuity in the surface. From the results above, it was suggested that significant differences in phase transition and surface microstructures were clearly related to the physicochemical changes and rheological properties, solubility and gelling ability of the types of agar gel.

• Journal of Korean Society of Steel Construction
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• v.15 no.3
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• pp.321-329
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• 2003

To effectively use the cross section of concrete decks, analytical and experimental studies on prestressed steel-box-girder bridges were performed in this study. The method of applying prestress was determined in the analytical study and the longitudinal behavior of the prestressed steel-box-girder bridge was considered in the experimental study. The object model for these studies was a two-span continuous bridge. The method of applying prestress determined herein was divided into two parts: one is that apply prestress to the concrete deck at its intermediate support, and the other is that apply prestress to the lower flange of the steel-box-girder bridge at its end support. The prototype bridge for the experiment was simulated based on the rule of similitude and was fabricated according to construction steps to apply prestress effectively. From the results of the experimental study, it has demonstrated that the prestressed steel-box-girder bridge provides better performance than the general steel-box-girder bridge in view of the increase of the design live load, the reduction of the tensile stress of the concrete deck at intermediate support, and the reduction of the displacement.