• 제목/요약/키워드: Chang Hyun-kwang

검색결과 962건 처리시간 0.03초

오픈마켓에서 의류분야 매출 증대를 위한 전자상거래 모델 (An Electronic Commerce Model for Increasing Sales in Open Market Area of Clothes)

  • 이현창;서신림;왕하양;신성윤;이양원
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2011년도 제44차 하계학술발표논문집 19권2호
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    • pp.269-271
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    • 2011
  • E-commerce done by between buyers and sellers mainly rely on computer networks and business transactions are carried out according to certain standards of various business activities. E-commerce is based on modern information technology and network technology, financial electronic collection, management, information technology, business and trade information networks into one, aimed at logistics, capital flow and information flow of harmony and unity of the new trade, trade activities of the entire process, electronic, networking and digital. In this paper, we investigate for online shopping, for example, to illustrate the current problems in an area of clothes market. Also we proposed an ideal model appropriate to increase sales and show the analysis results compared to conventional clothes market in open market.

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근치적 절제술 시행한 난소암 환자에서 항암치료 후유증 치험 1례 (A Case Report : Complications of Chemotherapy after Curative Resection in Patient with Ovarian Carcinoma IV)

  • 이지현;김건희;최창민
    • 대한한방부인과학회지
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    • 제27권3호
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    • pp.124-134
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    • 2014
  • Objectives: We designed this study to evaluate the effect of Korean medical treatment on complications of chemotherapy after curative resection in patient with ovarian carcinoma IV. Methods: The patient got total abdominal hysterectomy and bilateral salpingo-oophorectomy (TAHBSO) on 9/4 and received chemotherapy on 10/7, 10/28, 11/18. During this period, the patient suffered from anorexia, dyspepsia, nausea, weight loss and insomnia. We treated the patient with herbal medicine and acupuncture. The efficacy of treatment was evaluated with visual analog scale (Vas), weight and 36-item short form health survey instrument (SF-36). Results: After treatment, although the scale values went ups and downs according to chemotherapy schedule, abdominal pain Vas changed 7 to 0, weight changed 46 kg to 51 kg. Also, SF-36 scores increased. Conclusions: This case report shows that the Korean medical treatment is useful in the treatment of complications of chemotherapy after curative resection in patient with ovarian carcinoma IV.

2MVA급 배터리 에너지 저장 시스템 개발 (A Development of 2MVA Battery Energy Storage System)

  • 김수홍;김윤현;임창진;김광섭;권병기;최창호
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2011년도 전력전자학술대회
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    • pp.5-6
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    • 2011
  • 본 논문은 POSCO ICT에서 개발한 2MVA/500kWh급 BESS(Battery Energy Storage System)에 대해 기술하였다. 개발된 BESS는 상위 EMS(Energy Management System)와 연계를 위한 주제어부, 전력변환을 위한 PCS(Power Conditioning System)부, 에너지 저장을 위한 BCS(Battery Conditioning System)부로 구성되어 있다.

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자동 자기 동조 PID 제어기의 전문가 제어 (A study on Expert control of Self-Tuning PID Controller)

  • 채창현;이창훈;우광방
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1987년도 정기총회 및 창립40주년기념 학술대회 학회본부
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    • pp.79-81
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    • 1987
  • Expert systems have a variety of potential applications in process control. The application domain ranges from the entire plant system to a single loop system. Both, off-line and real-time problems may be realized. In this paper, expert system is employed as a part of a single control loop of PID Controller with self-tuning. The goal of expert system in the present study is to build up the necessary process knowledge required for efficient control. In order to achieve this process, the development of an expert system and a prototype model is carried out. OPS5, a rule based production system, is utilized in experiment, and common LISP is used for man-machine interface.

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지능형 제어 기법에 의한 공정 제어 (Process Control Utilizing the Method of Intelligent Control)

  • 채창현;이창훈;임은빈;우광방
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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    • pp.930-933
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    • 1988
  • This paper demonstrates an AI application for representing operator's heuristic knowledges in implementing process control. AI controller constitutes servo and regulatory controller, respectively. The knowledge base for servo controller was designed to obtain the process output with respect to the desired set-point in short period. The regulatory controller was to provide smooth output near the set-point. The AI controllers was implemented in Turbo-PROLOG on IBM-PC. For the parallel processing, Turbo-C was linked to calculate the process output. The result shows that this AI controller can be well suited not only for minimum phase but also for non-minimum phase. This controller may be used as a back-up controller for rather extensive expert system.

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자기 부상형 정밀 저울의 자계와 힘을 선형화하기 위한 최적 설계 (Optimal Design of Magnetic Scale for Linearizing Field and Force)

  • 안광옥;이창환;임창환;정현교
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.141-143
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    • 2001
  • 자기 부상력을 이용한 정밀 저울은 화학 실험실과 같이 정밀한 측정을 필요로 하는 곳에서 사용되고 있다. 이 정밀 저울은 저울의 측정대가 초기 위치로부터 이동하는 거리와 자속 밀도와의 상관관계를 이용하여 무게를 구하는 방식을 사용한다. 그런데 기존의 정밀저울은 힘이나 자속 밀도가 측정대의 이동하는 거리에 대해서 비선형적인 특성을 갖고 있기 때문에 거리에 대한 무게를 계산하는데 어려움이 있었고, 따라서 이동 가능 범위가 제한되어 있다는 단점이 있었다. 본 논문에서는 이런 문제점들을 해결하기 위해서 자기 부상형 정밀저울의 자석 표면에 부가적인 금속 구조를 덧붙인 새로운 모델을 제안하였고, 유한요소법과 진화 알고리즘을 사용하여 금속 구조의 형태를 최적화하였다. 그 결과 기존 자기 부상형 정밀 저울의 문제점인 비선형적 특성을 해결하고 이동 가능 범위도 향상시켜 더 간단하면서도 정화하게 무게를 계산할 수 있게 하였다.

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Hypoglycemic Acitivity of Medicinal Plants

  • Kim, Chang-Johng;Cho, Seung-Kil;Shin, Myung-Su;Cho, Hyun;Ro, Dong-Suk;Park, Jong-Sei;Yook, Chang-Soo
    • Archives of Pharmacal Research
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    • 제13권4호
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    • pp.371-373
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    • 1990
  • The hypoglycemic activity of water extracts of fifty six medicinal plants were evaluated in the streptozotocin-induced diabetic mice. Twelve medical plants have significantly antidiabetic activity ; Mori RADICIS cORTEX, Kwang Fang Chi Radix, Paeoniae Radix, Eugeniae Flos, Atractylodis Rhizoma, Opiopogonis Tuber, Rosae Multiflorae Fructus, Glycyrrhizae Radix, Tetrapanacis Medulla, Bigno, Forsythiae Fructus Sophorae Radix.

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A STUDY ON MEMBRANE TRANSPORT OF BRAZILIN USING PRIMARY CULTURED RAT HEPATOCYTES

  • Moon, Chang-Kiu;Park, Kwang-Sik;Kim, Seonh-Gon;Moon, Chang-Hyun
    • Toxicological Research
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    • 제7권2호
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    • pp.173-181
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    • 1991
  • Membrane transport of brazilin was investigated i primary cultured rat hepatocytes. Brazilin was transported into hepatocytes very slowly and reached plateau at about 60 minutes. Saturation of transport process was not observed and the transport was not affected by ouabain, metabolic inhibitors, and its structural analog. The amount of brazilin transported into hepatocytes was decreased when the environmental temperature was decreased. These results suggest that brazilin might be transported into hepatocytes by simple diffusional process.

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동원내상증(東垣內傷證)에 대한 온병학적(溫病學的) 해석(解析) (A Study on Dongwon(東垣)'s Internal Injury Syndrome in the Aspect of the Study on Epidemic Febrile Disease)

  • 양광열;백유상;장우창;정창현
    • 대한한의학원전학회지
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    • 제21권1호
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    • pp.235-255
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    • 2008
  • Byeollyangchamsa has been a key factor in formation of Dongwon(東垣)'s theory on internal injuries. The majority regarded Byeollyangchamsa as just epidemic disease, while Dongwon(東垣) regarded it as internal injuries by improper diet and overstrain. However, an analysis of Dongwon(東垣)'s internal injury syndrome revealed that it was a kind of external affections caused by damp-heat. In particular, heat rather than dampness have developed as the disease got worse. Therefore It can be regarded as the serious syndrome to show the impairment of Gi(氣), blood, fluids and humors for pathogenic fire.

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적층 압전변압기용 저온소결 PMN-PZT 압전세라믹의 $Li_2CO_3$ 첨가에 따른 유전 및 압전특성 (Dielectric and piezoelectric properties of low temperature sintering PMN-PZT ceramics for multilayer piezoelectric transformer with $Li_2CO_3$ addition)

  • 이창배;류주현;박창엽;정광현;정영호;백동수;정회승
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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    • pp.821-825
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    • 2004
  • In this paper, in order to develop the low temperature sintering ceramics for multilayer piezoelectric transformer, PMN-PZT ceramcis using $Li_2CO_3$ and $Bi_2O_3$ as sintering aids were manufactured, and their microstructural, dielectric and piezoelectric properties were investigated. The sintering aids were proved to lower the sintering temperature of piezoelectric ceramics due to the effect of $LiBiO_2$ liquid phase. At 0.1wt% $Li_2CO_3$ added specimen sintered at $970[^{\circ}C]$, electromechanical coupling factor(Kp), mechanical quality factor(Qm) and dielectric constant showed the optimum values of 0.50, 2,413 and 1,245, respectively, for multilayer piezoelectric transformer application.

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