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.

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.

IT기업의 신성장 체계 구축을 위한 성과분석

김윤호,강희조,박경열,Kim Yoon-ho,Kang Hee-jo,Park Kyong-ryol 한국정보통신학회 2004 한국정보통신학회논문지 Vol.8 No.8

IT Technology Paradigm Sift from hardware, software, networking to digital contents. In year 2001, IT small and medium size manufacture occupied 3.8% of gross domestic product(GDP). In the mean time, owing to the acceleration of global competition in information and communication technology, life cycle is reduced and global M&A is increased. The aim of this research is to analyze the performance of potential small and medium sized IT enterprise which can be adapt the change of new paradigm. and Also to work out a program of government's supports plan. Finally, It is to study a better plan that promote a new shape enterprise, which aimed to reform the industrial system. Some kinds of investigation, namely, ground investigation as well as questionnaire are performed in order to analyze not only the results of potential small and medium sized IT enterprise but also it's promoting plans. IT산업의 기술발달이 하드웨어, 소프트웨어, 네트워킹에서 콘텐츠기술로 패러다임이 변화함에 따라 중소벤처기업들의 기술개발전략 또한 변화하고 있으며, IT중소기업은 2002년말 GDP의 3.8%를 기여하고 있다. 주력 IT산업의 지속적이고 목표지향적인 경쟁력 제고를 위해서는 IT기업들의 기술, 성장가능성 등의 성과 분석 및 향후, 시장창출 및 확산의 성공/실패 요인이나 각종 정부지원내용의 실효성 등에 대한 조사가 필요하다. 또한 정부에서 추진하고 있는 미래 정보통신 산업에 대한 선택과 집중방식의 정책의 실현을 위해서는 중소 IT기업의 글로벌 육성 방안도 모색되어야한다. 본 연구에서는 IT기술 개발 계획의 중점 분야 및 기술 분야를 기반으로 유망 IT기업의 경영전반에 대한 성과를 분석을 함으로써 정보통신 산업 구조개혁 및 새로운 형태의 중소기업지원 및 육성 방안을 위한 전략을 제안한다.

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.

UML 다이어그램을 위한 다이어그램 레포지토리의 정보구조화

김윤호,Kim, Yun-Ho 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.12

본 논문에서는 UML 다이어그램에 대응되는 코드 생성을 위하여 요구되는 정보를 저장하기 위한 레포지토리를 구축하는 방법을 제시한다. 객체 지향 프로그래밍에서는 객체 간의 상호 작용이 핵심이므로, UML 다이어그램들 중에서 클래스 다이어그램과 시퀀스 다이어그램에 대해서 논의를 전개한다. 클래스 다어어그램을 기반으로 실행 시간에 객체가 상호 동작하는 절차를 보이는 시퀀스 다이어그램으로부터 상응하는 코드를 생성하게 되며, 이를 위해서는 코드생성에 필요한 정보를 추출하여 정보 저장소인 레포지토리를 구축하여야 한다. 따라서 본 논문에서는 시퀀스 다이어그램의 메시지 유형을 다섯 개로 분류하고 이들로부터 각각의 레포지토리를 구성하기 위하여 필요한 항목과 그 값에 대한 정보를 추출하여 구조적으로 정보를 저장하는 방법을 제시한다. 시퀀스 다이어그램은 이들 메시지들로 구성되므로, 각 메시지에 대한 구조화된 레포지토리를 순차적으로 수집하여 최종적인 레포지토리를 구성한다. This paper presents the technique on structuring information of the diagram repository for UML diagrams. Because object interactions are the body of object-oriented programming, this paper handles especially the sequence diagrams and class diagrams among UML diagrams. Based on class diagrams, sequence diagrams represent the procedure of object interactions in run-time and then the corresponding codes are generated from the contents of those sequence diagrams. To do this work, this paper presents a method to construct the information repository for generating code from the contents of sequence diagrams. This paper classifies the five message types of sequence diagrams and then extracts the needed information including items and values on the corresponding message types for constructing message repositories. Because sequence diagram is composed of messages included, the final repository is constructed by collecting each of structured repositories on messages sequentially.

Maxent 모델을 이용한 양봉꿀벌의 서울시 수분 잠재환경 분석

김윤호,조용현,배양섭,김다윤,Kim, Yoon-Ho,Cho, Yong-Hyeon,Bae, Yang-Seop,Kim, Da-Yoon 한국환경복원기술학회 2020 한국환경복원기술학회지 Vol.23 No.4

The honeybee serves for most entomophilous flowers. They are a core species for maintaining the ecological system. Though the urban ecological system needs bees' mediation of pollination as well, we have little understanding on how the honeybee reacts to the physical environments of an urban city. This study is a basic research to enhance the potential environment for pollination in an urban area and aims to review the urban environmental variables which are highly linked to the pollination mediations by the honeybee. The study composed a Maxent model by adopting nine urban environmental variables and the locations of the Apis mellifera's appearances around 52 spots in Seoul. The variables reflect the ecology of the Apis mellifera. Of the urban environmental variables used for the model composition, six variables were found as not having meaningful correlations with the Apis mellifera's appearances and finally, building coverage, actual vegetation and land cover were selected as the appearance variables of the Apis mellifera. The AUC, the reliability indicator of the final model was 0.791 (sd=0.077). And the importance data of the variables used for the model were 55.6%, 27.9%, and 16.5% for building coverage, actual vegetation and land cover, respectively. The result of the study showed that the building coverage has the highest correlation with the appearance of the honeybee. And, as per the actual vegetation, the artificially tree planted area as well as the cultivated field and meadow in an urban area were functioning as the most important environmental conditions for the honeybee to be inhabitable. The study is expected to be utilized as the base material for the urban planning and park green area planning to enhance the potential environment for pollination in an urban area.

OTFT 절연체용 폴리이미드 기반 고안정성 유기절연소재 기술

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

액정형 유기반도체를 이용한 유기트랜지스터(OTFT) 적용 기술

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

서비스 지향 아키텍처를 위한 경량 ESB 엔진의 설계 및 구현

김윤호,조성환,Kim, Yoon-Ho,Cho, Seong-Hwan 한국인터넷방송통신학회 2014 한국인터넷방송통신학회 논문지 Vol.14 No.6

Service Oriented Architecture(SOA) is a flexible structure which does not affect other services even when a specific service is changed. It provides the platform with neutral interfaces independent of any others, where services are loosely coupled in a standard way. While ESB (Enterprise Service Bus) is a key technology for service-oriented architecture, few research and development for ESB has been done. In this paper, we designed and implemented the key components of ESB such as mediation service, message oriented middleware service, operation service, monitoring service, application connection service, and database connection service. The performance evaluation was done by measuring the message processing time for the number of messages with various sizes. 서비스 지향 아키텍처란 서비스들이 표준 방식에 의해 서로 느슨하게 연결(loosely coupled)되어 특정 구현에 종속되지 않은 중립적인 인터페이스를 제공함으로써, 특정 서비스를 변경 하더라도 연결된 다른 서비스에는 영향을 주지 않는 유연한 구조를 의미한다. ESB(Enterprise Service Bus)는 서비스 지향 아키텍처를 실현하기 위한 중요한 관련 기술 중 핵심요소로서 위치를 확보해가고 있으나, 국내 서비스 지향 아키텍처를 위한 ESB에 대한 개발과 연구는 부족한 실정이다. 본 논문에서는 ESB의 중계 서비스, 전송서비스, 운영서비스, 모니터링 서비스, 애플리케이션 접속 서비스, 데이터 접속 서비스를 가능하게 하는 각 주요 응용 컴포넌트의 설계 및 구현을 하였으며, 메시지 건수에 대한 데이터의 크기별에 따른 처리시간을 측정하여 성능평가를 실시하였다.

저온 Cu/Ag-Ag/Cu 본딩에서의 Ag 나노막 효과

김윤호,박승민,김사라은경,Kim, Yoonho,Park, Seungmin,Kim, Sarah Eunkyung 한국마이크로전자및패키징학회 2021 마이크로전자 및 패키징학회지 Vol.28 No.2

차세대 반도체 기술은 이종소자 집적화(heterogeneous integration)를 이용한 시스템-인-패키징(system-inpackage, SIP) 기술로 발전하고 있고, 저온 Cu 본딩은 SIP 구조의 성능 향상과 미세 피치 배선을 위해서 매우 중요한 기술이라 하겠다. 본 연구에서는 porous한 Ag 나노막을 이용하여 Cu 표면의 산화 방지 효과와 저온 Cu 본딩의 가능성을 조사하였다. 100℃에서 200℃의 저온 영역에서 Ag가 Cu로 확산되는 것보다 Cu가 Ag로 확산되는 것이 빠르게 관찰되었고, 이는 저온에서 Ag를 이용한 Cu간의 고상 확산 본딩이 가능함을 나타내었다. 따라서 Ag 나노막을 이용한 Cu 본딩을 200℃에서 진행하였고, 본딩 계면의 전단 강도는 23.27 MPa로 측정되었다. System-in-package (SIP) technology using heterogeneous integration is becoming the key of next-generation semiconductor packaging technology, and the development of low temperature Cu bonding is very important for high-performance and fine-pitch SIP interconnects. In this study the low temperature Cu bonding and the anti-oxidation effect of copper using porous Ag nanolayer were investigated. It has been found that Cu diffuses into Ag faster than Ag diffuses into Cu at the temperatures from 100℃ to 200℃, indicating that solid state diffusion bonding of copper is possible at low temperatures. Cu bonding using Ag nanolayer was carried out at 200℃, and the shear strength after bonding was measured to be 23.27 MPa.