• Nuclear Engineering and Technology
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• 제23권4호
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• pp.401-409
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• 1991

본 연구에서는 길이 방향의 핀이 달린 봉 다발의 난류 마찰계수를 예측할 수 있는 해석적 모델이 개발되었다. 현재 KMRR의 연료봉으로 핀이 달린 봉다발이 고려되고 있다. 본 모델에서는“Law of the Wall”이 전체 수로에 적용 가능하다고 가정하였다. 전체 수로를 작은 요소 수로와 핀 간 수로로 나누고 각 요소 수로마다“Law of the Wall”속도 분포 곡선을 적분하여 난류 마찰계수를 예측할 수 있는 해석적 방정식을 얻는다. 이 방법을 KMRR 연료봉에 적용한 결과 6핀 실험결과는 잘 예측하고 8핀 실험 결과는 15％ 정도 높게 예측하였다.

• 대한조선학회 특별논문집
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• 대한조선학회 2007년도 특별논문집
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• pp.107-117
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• 2007

A surface piercing propeller (SPP) in tunnel has been proposed recently as a new propulsion system for a high speed air cavity ship. The purpose of the present study is to investigate the characteristics of the SPP in tunnel through a series of model tests. A model propulsion system is placed on a dummy body made of Acrylics. The tunnel is divided into two regions by a guide vane extending from the inlet to the center of the propeller shaft. Air has been supplied from an air nozzle placed at the bottom of the dummy body and the changes in propeller performances caused by the air flow are investigated. The measurements are done for open water and in-tunnel conditions, both for fully and partially submerged propeller. The influence of the guide vane configurations on the propeller performance is also studied. The experiments are performed at the variable pressure circulation water channel of Inha University.

• 혜화의학회지
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• 제10권1호
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• pp.79-92
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• 2001

According to the literatural study on the Acupuncture & Moxibustion and Traumatherapyof hysterorrhea, the results were as follows. 1. The acupuncture & moxibustion of hysterorrhea is focussed on bloody uterine discharge, leukorrhea and we must carefully diagnose the etiology & the machanism of disease. 2. The causes of hysterorrhea are dampness, impairment of seven emotion, irregular food intake, excessive intercourse and they are impotantly related to liver, spleen, kidney, the ren channel, the chong channel. 3. The diagnosis is grossly divided into the flowing downward of damp-heat, the weaknessof the qi of the spleen, dificiency of yuan of the kidney and according to the each diagnosis, we should select adquate points representing the treatment of cooling(zhongji, yinlingquan, xingjian, etc), desiccation, heiping qi(qihai, zusanli, sanyinjiao, etc), tonificating yang (guanyuan, mingmen, shinshu, etc). 4. The moxibustion is the warming the lower jiao and eliminating the cold, the points are the mingmen point, the zhongji point, the guanyuan point, etc. 5. Besides the acupuncture & moxibustion of hysterorrhea, we can make use of acusetor, ear acupuncture, endermosis, dong shi shen fa. 6. As of traumatherapy of hysterorrhea, fumigation,abluent and soppository are generally used. and the prescriptions as GAMISASANGSAN, BANSUKSAN are used. 7. The medical herbs used on the treatment of hysterorrhea are the tonificating yang, dissipeting, desiccating medicines generally composed of CNIDII FRUCTUS, ALUMEN, ZANTHOXYLI FRUCTUS.

• 한국방재학회 논문집
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• 제7권1호통권24호
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• pp.57-66
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• 2007

본 연구에서는 WMS를 이용하여 소유역 분할에 따른 수문지형정보의 변화와 강우-유출모의를 통한 효과적인 분할방법을 제공하는데 있다. 대상유역은 금강수계의 미호천 유역으로 선정하였으며 유역의 분할 방법은 유역면적, 하천경사, 하천연장에 대하여 분할하였다. 소유역 분할 방법에 대한 유역의 수문학적 적용은 Clark 단위도법, SCS 무차원단위도법, Snyder 단위도법으로 실제 관측수문곡선과 비교하였다. 적용결과 유역면적에 의해 5개의 소유역으로 분할할 경우에 SCS 단위도법이 가장 좋은 결과를 나타났으며, 본 연구는 미호천유역의 유출변동에 대한 기초 자료로 활용될 수 있다.

• Journal of Ginseng Research
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• 제31권2호
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• pp.69-73
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• 2007

Since chemical structures of ginsenoside as active ingredient of Panax ginseng are known, accumulating evidence have shown that ginsenoside is one of bio-active ligands through the diverse physiological and pharmacological evaluations. Chemical structures of ginsenoside could be divided into three parts depending on diol or triol ginsenoside: Steroid- or cholesterol-like backbone structure, carbohydrate portions, which are attached at the carbon-3, -6 or -20, and aliphatic side chain coupled to the backbone structure at the carbon-20. Ginsenosides also exist as stereoisomer at the carbon-20. Bioactive ligands usually exhibit the their structure-function relationships. In ginsenosides, there is little known about the relationship of chemical structure and biological activity. Recent reports have shown that ginsenoside $Rg_3$, one of active ginsenosides, exhibits its differential physiological or pharmacological actions depending on its chemical structure. This review will show how ginsenoside $Rg_3$, as a model compound, is functionally coupled to voltage-gated ion channel or ligand-gated ion channel regulations in related with its chemical structure.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.237-243
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• 2004

A multichannel smart sound sensor capable to detect and identify sound events in noisy conditions is presented in this paper. Sound information extraction is a complex task and the main difficulty consists is the extraction of high­level information from an one-dimensional signal. The input of smart sound sensor is composed of data collected by 5 microphones and its output data is sent through a network. For a real time working purpose, the sound analysis is divided in three steps: sound event detection for each sound channel, fusion between simultaneously events and sound identification. The event detection module find impulsive signals in the noise and extracts them from the signal flow. Our smart sensor must be capable to identify impulsive signals but also speech presence too, in a noisy environment. The classification module is launched in a parallel task on the channel chosen by data fusion process. It looks to identify the event sound between seven predefined sound classes and uses a Gaussian Mixture Model (GMM) method. Mel Frequency Cepstral Coefficients are used in combination with new ones like zero crossing rate, centroid and roll-off point. This smart sound sensor is a part of a medical telemonitoring project with the aim of detecting serious accidents.

• 혜화의학회지
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• 제13권2호
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• pp.303-315
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• 2004

1. The acupuncture & moxibustion of hysterorrhea is focussed on bloody uterine discharge, leukorrhea and we must carefully diagnose the etiology & the machanism of disease. 2. The causes of hysterorrhea are dampness, impairment of seven emotion, irregular food intake, excessive intercourse and they are impotantly related to liver, spleen, kidney, the ren channel the chong channel 3. Using external medical treatment for Leucorrhea is washing and fumigation on vagina, to wash vagina, to insert vagina, cleansing theraphy and use with Suppository such as YONGYEOMGO(龍鹽膏), KAMISASANGJASAN(加味蛇床子散), SASANGSACHUNGSEJE(蛇床子洗劑). 4. The efficacy of medicines to use external medical treatment is as follow to helpcirculation of blood, to warm spleen and stomach, to warm blood, to warm uterus and remove cold, to remove heat and dry moisture, to down heat-product, to contract bloodvessel, to counteract poison and destory virus, to make enerey and blood.. 5. The diagnosis is grossly divided into the flowing downward of damp-heat, the weaknessof the qi of the spleen, dificiency of yuan of the kidney and according to the each diagnosis we should select adquate points representing the treatment of cooling(zhongji, yinlingquan, xingjian, etc), desiccation, heiping qi(qihai, zusanli, sanyinjiao, etc), tonificating yang (guanyuan, mingmen, shinshu, etc). 6. The moxibustion is the warming the lower jiao and eliminating the cold, the points are the mingmen point, the zhongji point, the guanyuan point, etc 7. Besides the acupuncture & moxibustion of hysterorrhea, we can make use of acusetor, ear acupuncture, endermosis, dong shi shen fa.

• 대한기계학회논문집
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• 제16권8호
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• pp.1545-1551
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• 1992

본 연구에서는 벽면의 법칙(law of the wall)을 이용하여 봉다발의 난류 마찰 계수를 예측하는 간단한 방법이 제안되었다. 이 방법은 전체 유로를 요소 유로로 나 누고 각 요소유로에 벽면의 법칙을 적용하여 마찰 계수를 구한다.이 방법을 사용 하면 마찰 계수가 간단한 산술식의 형태로 나타나므로 복잡한 형상의 봉다발의 마찰 계수도 손쉽게 구할 수 있다.

• 한국정보통신학회논문지
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• 제7권8호
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• pp.1674-1683
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• 2003

Markovian 신호의 간섭(interruption)하에서 Stop­-and-­Wait ARQ protocol을 적용한 패킷 데이터 다중화기의 성능을 분석한다. 시스템 모델을 살펴보면 입력 프로세스는 Poisson 프로세스로, 출력 채널은 연속되는 시간 슬롯(slot)으로 분할되고 데이터 패킷은 이 슬롯 시간 동안에 전송된다. 이 시스템에서, 프레임 시간은 왕복 지연 시간으로 정의되었다. 이 모델에서 출력 채널은 Markovian 간섭에 의해 데이타 전송이 중단되는 blocking state와 간섭이 없는 non-­blocking state로 구분된다. Markovian 간섭신호를 고려하면서, 2개의 연속적인 프레임이나 slot사이에 버퍼 상태에 관한 관계식을 고려하여 전체적인 시스템이 분석되었다. 분석된 자료 값이 시뮬레이션과 비교적 잘 일치함을 확인하였다.

• 동의생리병리학회지
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• 제17권4호
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• pp.1050-1053
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• 2003

This study was carried out to investigate effects of Kamiguibi-tang extract on learning ability of ethanol-treated rats. The rats were divided into 3 groups; normal, control and sample group. Control group administered ethanol at a dose of 3g/kg bw.(25 v/v %), while sample group administered the Kamiguibi-tang extract(200mg/kg) 30 min. before treating same dose of ethanol as control group orally. All groups were subjected to trials of straight channel on the 1 st day and to those of multiple T-maze during the following 3 days. The time required in normal group for the straight or T-maze of the 2nd and 3rd trials was significantly shorter than that of the 1 st, while the control group showed no significance. But in the straight channel or multiple T-maze trials, the sample group showed significant decrease in the time required against the control group and also showed significant decrease in the number of selecting errors.