애엽(艾葉) (Artemisia asiatica Nakai)의 혈압강하작용(血壓降下作用)

김윤호,신홍기,김기순,Kim, Yun-Ho,Shin, Hong-Kee,Kim, Kee-Soon 대한생리학회 1981 대한생리학회지 Vol.15 No.2

The wormwood is one of the plants which occur widely throughout the world. Though the precise data on the entire chemical composition of mugwort leaves are not available, the major principles which have been found so far include inulin, alkaloid, thujon, sesquiterpene and several vitamins. Santonin, a parasiticide, is one of the glucosides extracted from the limited species of wormwood. It has long been known in herb medicine that the plants of this family has not only strong hemostatic, analgesic and parasiticidal actions but also therapeutic effects for diarrhea, stomachache and asthma. In recent pharmaceutical botany the wormwood is introduced to have antipyretic and astringent actions also. The mugwort(Artemisia asiatica Nakai) is the most common species of wormwood that occurs in Korea. The usage of this edible leaves of mugwort is rather various. It is used not only for wormwood bath but also as forage, moxa and medicinal agents. Recently Kim et al reported from their study on the effect of mugwort on the motility of isolated intestine of rabbits that tonus and motility were markedly enhanced by mugwort but this effect of mugwort on intestinal motility was almost completely blocked by atropine suggesting that activity of mugwort was exerted through its cholinergic effect. It was the findings of Kim et al that prompted the authors to do the present experiment. The present study was undertaken to investigate effects of mugwort(Artemisia asiatica Nakai) juice on the respiration and blood pressure in cats. And also studied was the mechanism of depressor action of Artemisia asiatica Nakai Juice (AAJ). The results obtained are as follows; 1) It was observed that mean arterial blood pressure and heart rate were decreased markedly by AAJ. Following administration of 0.15 ml/kg and 0.3 ml/kg AAJ into cats the maximum depressor responses observed were $77.5{\pm}2.2\;mmHg$ and $94.0{\pm}3.7\;mmHg$ respectively. 2) Depressor responses to AAJ were blocked markedly by atropine whereas the responses were not affected by propranolol and dibenamine. Therefore it is strongly inferred that depressor action of AAJ results mainly from its cholinergic effect. This inference was further substantiated by the fact that heart rate change which invariably accompanies depressor responses to AAJ was almost completely abolished by atropinization. 3) After administration of AAJ into cats frequency of respiration was markedly increased while depth of respiration decreased during first 2-3 seconds.

초등수학 교과서 표현의 학습자 이해 가능성 분석

김윤호,최창우,Kim, Yun Ho,Choi, Chang Woo 영남수학회 2019 East Asian mathematical journal Vol.35 No.2

The purpose of this study is to analyze expressions in the first and second grade math textbooks in elementary school in the aspect of possibilities of learners' understanding and propose proper directions for expressions in math textbooks to increase the possibilities of their understanding. The findings show that there were four types of expression errors and five types of mathematical errors in the aspects of expression method and content, respectively.

OTFT 절연체용 폴리이미드 기반 고안정성 유기절연소재 기술

김윤호,Kim, Yun-Ho 한국전기전자재료학회 2021 전기전자재료 Vol.34 No.1

RGB Motion Segmentation using Background Subtraction based on AMF

김윤호,Kim, Yoon-Ho Korea Information Electronic Communication Technol 2014 한국정보전자통신기술학회논문지 Vol.7 No.1

Motion segmentation is a fundamental technique for analysing image sequences of real scenes. A process of identifying moving objects from data is a typical task in many computer vision applications. In this paper, we propose motion segmentation that generally consists from background subtraction and foreground pixel segmentation. The Approximated Median Filter(AMF) was chosen to perform background modeling. Motion segmentation in this paper covers RGB video data.

공심법에 의한 $BaTiO_3$ 분말제조

김윤호,이준,한일호,Kim, Yoon-Ho,Lee, Joon,Han, Il-Ho 한국세라믹학회 1986 한국세라믹학회지 Vol.23 No.4

$BaTiO_3$ ceramics powder was prepared by coprecipitation method either in oxalic acid solution or in potassium hydroxide solution. Thermal decomposition of coprecipitated $BaTiO(C_2O_4)_2$.$4H_2O$ powder in oxalic acid solution was investigated by means of Themogravimetry Differential Thermal Analysis and X-ray Diffraction Analysis. Low temperature decomposition of coprecipitated $BaTiO(C_2O_4)_2$.$4H_2O$ caused narrow particle size distribution whereas high temperature decomposition caused fairly wide particle size distribution by partial sintering. As the reaction time increased the average particle size of coprecipitated $BaTiO_3$ powder in KOH solution was increased. The most narrow paticle size distribution was obtained when the coprecipi-tates were ripened for 4hrs.

IT 혁신과 한류열풍

김윤호,송학현,윤병민,Kim Yoon-ho,Song Hag-hyun,Yoon Byong-min 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.4

시장의 세계화와 실시간화가 급속히 진행되면서 우리나라의 정보기술(IT) 은 세계시장을 겨냥하여 발전하고 있고, 아시아 지역에서는 문화컨텐츠(CT)를 통한 문화의 전파가 자연스럽게 이루어지고 있다. 한류는 90년대말 중국의 동북 3성에서 형성되어 그 열풍이 동남아로 확산되었고, 드라마 $\cdot$ 대중음악 중심에서 최근에는 게임$\cdot$ 음식 $\cdot$ 패션 등 대중문화 전반으로 확산되고 있다. 본 논문에서는 지식기반 경제 사회에서의 IT 혁신과 한류 열풍과 연계한 성과를 분석하였다. 또한 한류열풍과 IT가 접목되어 자원이 빈약하고 시장규모가 영세한 우리나라의 효과적인 세계시장 진출방안을 몇 가지 관점에서 고찰하였다. As a rapidly progressing of globalization and real time Prcessing in market, Korea's IT is developing, which is aimming at world market. In addition, propagation of cultivation is forming natually by lead to CT in the Asia. Latest in '90's hallyu(korean culture wave) was generated from in the east-north China province and moved to the east south Asia. It is also spreading form TV drama, music to movie, game, food, fashion and so on. This paper analyzed the outcome related with hallyu and IT innovation in knowledge-based economic society. It also addressed some effective strategies for advancing world market incorporating hallyu waves into IT.

중소기업의 기술혁신 지원을 위한 전문가(Project-Specialist)제도 도입 방안

김윤호,Kim Yoon-ho 한국정보통신학회 2004 한국정보통신학회논문지 Vol.8 No.7

IT중소기업(Small and Medium-size Enterprises)의 기술개발은 대학, 출연연구소 및 대기업의 기술 개발과는 달리 인력, 재원, 규모 둥에서 환경이 매우 열악하다. 중소기업들이 열악한 환경은 정부가 지원하는 기술개발 출연사업에 대한 과열경쟁을 불러오고, 기술개발 규모는 과제당 3억원 내외로 적은 예산을 다수의 기업에 나누어 지원하는 현상이 발생하고 있다. 다수 소액과제를 지원관리하면서 연구개발 내용보다는 기업의 부실화 둥 기술개발 외적인 관리에 치중하게 된다. 따라서 실태조사 등 불필요한 현장 감사가 진행될 수밖에 없는데, 감독목적의 실태조사보다 기술개발을 주관하는 중소기업의 기술애로 해소 및 상업화 등 노하우 지원이 시급한 실정이다. 따라서 중소기업의 실질적인 기술개발 지원을 위해서 대학이나 연구소 등에 근무하는 기술개발 및 상용화 전문가들을 중소기업의 기술개발 지원 전문가로 활용하는 방안을 제안한다. Small and Medium-size Enterprises's R & D Program progress is hard than the university, government R & D agency and big enterprises. this environment make heat competition among the small and medium-size enterprises and subsidies little budget for many enterprises. from the management agency of the Institute of Information Technology Assessment(IITA)'s most of the activities focusing to the enterprises management not R & D Program. so, this paper suggestion an adaption on the project specialist system for the small and mediumlTenterprises'stechnologyinnovation'.

Seoul IT Park를 건설하자

김윤호,Kim, Yun-Ho 한국과학기술단체총연합회 2005 과학과 기술 Vol.38 No.8

판형열교환기의 세브론각에 따른 증발 열전달특성 및 압력강하에 대한 실험적 연구

김윤호,이규정,Kim, Yun-Ho,Lee, Gyu-Jeong 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.2

Experiments on the evaporation heat transfer and pressure drop in the brazed type plate heat exchangers were performed using refrigerants R410A and R22. To investigate the geometric effect, plate heat exchangers with the same pitch and height but different 45$^{\circ}$, 35$^{\circ}$and 20$^{\circ}$chevron angles are used. Tests were conducted fur the ranges of the mass flux of refrigerant from 13 kg/m$^2$s to 34 kg/m$^2$s, the evaporation temperatures of 15$^{\circ}C$, 1$0^{\circ}C$ and 5$^{\circ}C$, vapor quality from 0.15 to 0.95 and the heat flux from 2.5 kW/m$^2$to 8.5 kW/m$^2$. The evaporation heat transfer coefficients and pressure drops were measured. Most of flow patterns are in the chum flow regime and become close to the annular flow for increasing the mass flux and the vapor quality. The heat transfer coefficient increases with increasing the evaporation temperature at a given mass flux in all plate heat exchangers. Also, the pressure drop increases with increasing the mass flux and the quality and decreasing the evaporation temperature and the chevron angle.

액정형 유기반도체를 이용한 유기트랜지스터(OTFT) 적용 기술

김윤호,Kim, Yun-Ho 한국정보디스플레이학회 2015 인포메이션 디스플레이 Vol.16 No.2