• 디지털산업정보학회논문지
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• 제4권2호
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• pp.93-100
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• 2008

After free trade, it is increasing to import crops, aquatic products, and livestock which are produce in a foreign land. But it is affect negatively to trust relationships and markets of Jeju's foods because of breaking it out that foreign productions exchange domestic. Therefore, this paper designed and implemented the Genuine Quotation system of Black pigs using UHF RFID. This system is developed for distinguishing spuriousness, then searching information of the product through EPC ONS in EPCIS to print within a screen. Moreover, this intuitional and efficient system is constructed by connecting various sensors and lights. It can be contributed income increase thorough the security for the quality authority of the agricultural & stockbreeding products with FCS, FCG Certificate and the genuine certificate of the black pig which is the one of most typical agricultural & stockbreeding products in the pure Green Province, Jeju.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.329-333
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• 2005

In this study paper, a 3[kW] Fuel Cell Generation (FCG)system with Fuel Cell(FC)simulator has been proposed. The developed FC simulator generates the actual voltage and current output characteristics of the Proton Exchange Membrane Fuel Cell (PEMFC), so that the overall performance and the dynamics of the proposed system could be effectively examined and tested. In this paper, at first, the system configuration and operational principle of the developed FC simulator has been investigated and the design process of the FCG system is explained in detail. In addition, the validity of the proposed system has been verified by the informative simulation and experimental results.

• Macromolecular Research
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• 제9권6호
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• pp.319-326
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• 2001

Fatigue crack growth (FCG) behavior of natural rubber/ethylene-propylene-diene rubber (NR/EPDM) blend vulcanizates under dynamic tearing condition was investigated by using a fracture mechanics approach. It appeared that variation of crack growth rate with blend compositions was dependent on the level of imposed tearing energy G. At low tearing energy region, the FCG rates of the blend were lower as the EPDM content was increased, while at high tearing energy region, the trend was reversed. Over the measured range of tearing energy G, all blend compositions showed the lower crack growth rates compared to the average of properties of component elastomers. When the blends were thermally aged, the fatigue resistance of the blends was deteriorated in proportion to the concentration of EPDM phase. Fatigue crack growth behavior of the blends was supposed to be associated with the inhomogeneities of the crosslink structure of the blends arising from cure incompatibility of the EPDM and NR when they are sulphur cured.

• 제어로봇시스템학회논문지
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• 제10권5호
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• pp.450-457
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• 2004

In this research, the automatic synthesis of knowledge models is proposed. which are the basis of the methods using qualitative models adapted widely in fault diagnosis and hazard evaluation of chemical processes. To provide an easy and fast way to construct accurate causal model of the target process, the Role-Behavior modeling method is developed to represent the knowledge of modularized process units. In this modeling method, Fault-Behavior model and Structure-Role model present the relationship of the internal behaviors and faults in the process units and the relationship between process units respectively. Through the multiple modeling techniques, the knowledge is separated into what is independent of process and dependent on process to provide the extensibility and portability in model building, and possibility in the automatic synthesis. By taking advantage of the Role-Behavior Model, an algorithm is proposed to synthesize the plant-wide causal model, Fault-Causality Graph (FCG) from specific Fault-Behavior models of the each unit process, which are derived from generic Fault-Behavior models and Structure-Role model. To validate the proposed modeling method and algorithm, a system for building FCG model is developed on G2, an expert system development tool. Case study such as CSTR with recycle using the developed system showed that the proposed method and algorithm were remarkably effective in synthesizing the causal knowledge models for diagnosis of chemical processes.

• 한국해양공학회지
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• 제27권1호
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• pp.37-42
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• 2013

The presence of a crack can increase the local stress or strain, which can cause inelastic deformation and significantly reduce the life of a component or structure. Therefore, in this study, the fatigue crack growth (FCG) behaviors of friction stir welded Al 2024-T3 and Al 7075-T6 specimens were examined, with fatigue cracks growing parallel to the dynamically recrystallized zone at variable ${\Delta}K$ values and an R ratio of 0.3. In addition, the FCG values of the base metal Al 2024-T3 and Al 7075-T6 were tested under the same conditions and parameters as comparative groups. The results showed that compared with the base metal Al 2024 specimen, which had the best fatigue property, the welded specimen had only 88% of the fatigue cycles.

• 한국인지과학회:학술대회논문집
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• 한국인지과학회 2000년도 한글 및 한국어 정보처리
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• pp.383-389
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• 2000

본고는 한영번역기 개발을 위한 기초 작업으로 '와/과'구문에 나타나는 여러 가지 패턴을 정리하고 이들 구문에서 보이는 중의성 문제를 해결하고자 하였다. 이러한 작업을 위해서는 자료 수집 및 분석이 우선이기 때문에 코퍼스에서 '와/과'구문을 뽑아서 분석하여 규칙을 마련하였다. 여기에서 사용된 자질연산문법(FCG)은 자연언어처리를 위한 문법으로 변형규칙과 수형도의 개념 없이 자질을 이용한 연산 체계로서 언어처리를 하고자 하는 문법이다. 이 이론을 바탕으로 규칙을 세우고 실제 언어 자료를 뽑아서 테스트를 하여 95%의 성공률을 보여주었다. 그러나 여기서의 연구는 '와/과'구문의 처리를 위한 가장 뼈대가 되는 기초연구이며, 앞으로 좀 더 많은 처리가 이루어져야 하리라 생각된다.

• 한국콘텐츠학회논문지
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• 제8권3호
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• pp.32-40
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• 2008

수입자유화 이후 외국에서 생산된 농수축산물의 수입이 급증하고 있다. 그러나 질이 낮은 수입산이 국산으로 둔갑하는 일이 자주 발생하면서 제주산 농수축산물의 신뢰도 및 판로에 부정적인 영향을 미쳐왔다. 이에 생산이력관리에 대한 필요성이 많이 요구되어지고 있다. 따라서 본 논문에서는 RFID를 활용한 흑돼지 출하이력관리 시스템을 설계하고 구현하였다. 제안 시스템은 청정 제주의 이미지를 한층 더 고양시킬 수 있게 지역 특산물인 흑돼지의 사육에서부터, 도축, 가공, 출하에 이르는 전 과정을 RFID 태그로부터 입력받아 관리하도록 설계하였다. 또한 사용자가 구현 시스템으로부터 관리되는 출하이력관리 정보를 언제 어디서든지 웹을 통하여 제공받을 수 있다. 이를 통하여 농가 소득 향상과 FCS, FCG, HACCP인증과 함께 제주산 농수축산물의 품질 보증 확보 및 안정적인 공급에 기여할 수 있다.

• 대한기계학회논문집B
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• 제35권6호
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• pp.633-640
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• 2011

본 연구에서는 고온의 미소농도구배 조건에서의 에지화염의 안정화 및 화염 강도 변화를 실험적으로 관찰하였다. 실험 연소기는 크게 혼합기가 투입되는 슬롯과 석영 채널 및 채널 내부 가열을 위한 추가적인 예혼합 연소기로 구성되어 있다. 실험의 정확성을 위해 각 경계 조건에 대한 정량적인 검증 절차가 수행되었다. 결론적으로 연료 농도 구배의 정량적인 제어와 질소 희석비율을 조절하여 고온의 조건에서도 에지화염을 임의의 위치에 안정화 시킬 수 있었다. 에지화염 내부에 존재하는 확산화염의 화염 강도가 채널 내부의 온도증가에 따라 증가하고 질소의 희석비율 증가에 따라 감소하는 것을 보였다. 연료에 따른 화염 강도 변화를 살펴본 결과 프로판의 경우가 메탄에 비해 강도 변화율이 큰 것을 알 수 있었다.

• 한국식품영양학회지
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• 제21권2호
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• pp.210-217
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• 2008

This study evaluated the hypolipidemic effects of Eleutherococcus senticosus combined with several oriental medicinal herbs. In addition, it addressed whether consuming a diet of healthy food along with a daily supplement of this composite could affect the health status of individuals suffering from diet-related disease such as obesity and hyperlipidemia. The effects of the combined medicinal herbal extracts(MHE) extracted with hot water on reducing serum lipids and improving blood parameters were examined in rats fed a high-fat diet for 5 weeks. Sprague-Dawley rats were randomly assigned to 4 groups: basal diet only(BDG), high fat diet without MHE(FCG), high fat diet and 10% MHE(F10E) and high fat diet and 20% MHE(F20E). Serum lipid contents and blood variables were examined after the experimental period. The results of were as follows. The hematological data for the 4 groups were similar indicating no significant differences. There were moderate level of serum GOT activity in the F10E and F20E groups as compared to the FCG group. Total cholesterol, LDL-cholesterol, triglyceride in serum and the atherogenic index were remarkably reduced in the MHE-supplemented groups as compared to the control group. However, F10E and F20E groups had significantly higher HDL-cholesterol levels than the control group. These results imply that combination of several medicinal herbal extracts could be used to reduce of serum lipid concentrations. The data from this study will be used as basic information with the field of functional food research to address how we can apply oriental medicinal resources to foods. Such research currently drawing considerable attention world-wide.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.333-337
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• 2008

This study investigates crack propagation behavior of Sn-3.0Ag-0.5Cu solder under pull-push loading conditions. Fatigue Crack Growth (FCG) tests were conducted on Center Cracked Plate (CCP) specimens in fast-fast (pp) strain waveform. The fast-slow (pc), slow-fast (cp) and slow-slow (cc) strain waveforms were also used to study the effect of strain rates. The crack propagation rates for the four strain waveforms were correlated with J-integral range and a scatter band of factor 4 was found. The crack growth rates for the pc waveform was highest, followed by cp, cc and then pp waveforms.