현행 중등학교 과학 실험 , 실습 교육 실태 조사 및 그 운영 진단 (Ⅱ) : 고등학교 과학 실험 , 실습 교육을 중심으로

김영호,이윤종,정원우,강용희,양승영,윤성효,안병호,윤일희,권용주,임성규,오철한,기우항,전명남,김중욱 한국과학교육학회 1998 한국과학교육학회지 Vol.18 No.3

본 연구는 96년도에 실시한 우리 나라 중학교 과학 실험·실습 교육의 실태 조사 연구에 따른 계속 연구의 일환으로 고등학교 과학 실험·실습 교육의 실태를 조사하기 위한 것이다. 연구내용은 고등학교 과학 교과서의 분석, 실험·실습 실시 현황 분석, 현행 실험·실습 교육의 문제점 분석, 현행 학교 구성원들의 실험·실습 교육 운영 실태 조사 및 현행 실험·실습 교육의 개선을 위한 연구과제 도출을 주요 연구내용으로 다루었다. 연구방법은 전국의 고등학교 80개교를 대상으로 이들 학교의 학생 1,977명, 교사 165명, 학교장 80명에게 적용하였다. 본 연구에서 밝혀진 결과를 중심으로 우리 나라 고등학교 과학 실험 실습 교육의 정상화를 위한 실험 내적인 연구과제를 제시하면 다음과 같다. (1)교재 개발에 대한 연구, (2)실험 킷트 개발에 대한 연구, (3)교사교육 및 재교육 프로그램 개발에 대한 연구, (4)교실 밖 실험·실습 활동 프로그램 개발에 대한 연구, (5)과학 실험·실습 소재의 개발에 대한 연구. This study was accomplished to analysis and survey on the experimental and practical science education of high school in korea for the consecutive study of the an analysis and survey on the experimental and practical science education of middle school in korea(Lee, Yoon-Jong et al., 1997). The status of facilities, management for the experiment, practices, teaching methods in high schools have been investigated. The present status and reasonable management of the high school science education have been grasped from the questionaires. To do this 165 high school science teachers, 1977 students and 80 principals of high schools in Korea are administered questionaires of Science Education Research Institute of Kyungpook National University(1997). The results of this study are as follows : The reasonable management for experiments and practices of science education were scanty in the high school around the urban and rural school owing to the shortage of facilities and equipments, crowded class, excessive class works for teacher, excessive contents of present textbooks and insufficiency of the administrative supports etc. The current teaching method of high school science has emphasized knowledge. This fact does not satisfy the objective of learning due to lack of the teaching method. Desirable directions for the improvement of present status of high school science education were proposed in this paper.

Print motor의 特性에 관한 考察

尹良雄,徐在鎬 圓光大學校 1981 論文集 Vol.15 No.1

Print Morer Junior Series is Compact High-quality D. C Motor with uniquue stamped-Conductor disc armatures ideally suited for use in Simple Adjustable speed drives. The armature has insolation placed between armature Conductors stamped from Copper steets, and the ends of the Conductors are to from an armature Circuits. Without iron Core or Commutator Segments, the motor has excellent features of low Commutation reactance good Commutation and no electrical or magnetical unbalance.

PeerToPeer기반 자원공유시스템에 대한 고찰

양광민,정윤호 中央大學校經營硏究所 2001 經營學論集 Vol.28 No.1

갑상선 질환에서 혈청 Microsome 항체 측정의 의의

윤영옥,장순모,박호자,이준열,양기화,정인숙,강석진 대한임상병리사협회 1984 임상병리사회지 Vol.16 No.1

효과적인 다차원 분석을 지원하는 스프레드시트 방식의 OLAP 인터페이스 설계 및 구현

윤민희,김진호,문양세 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

OLAP systems support effectively data analysis over a large volume of business data to make decisions for an enterprise. In order to process data analysis efficiently, OLAP systems pre-compute the summary of business data over various dimensions and store them into data warehouses. Several specialized tools have been developed to display and to browse the results of complex analytical queries on data warehouses. In this paper, we developed a spreadsheet-like tool to support OLAP operations and to browse the results of analytical queries. Spreadsheet is one of the most popular and user-friendly data analysis tool. It also has lots of advantages, which is interactive, easy to learn, etc. Thus this paper implemented an OLAP tool using spreadsheet-style interface to analyze large OLAP data on World-Wide Web. Through this tool, users can process OLAP activities easily and effectively by using the same ways as well-known shreadsheet tools like Microsoft Excel.

제주연근해 식물플랑크톤 군집의 계절변동과 기초생산

윤양호 濟州大學校海洋硏究所 1993 해양과환경연구소 연구논문집 Vol.17 No.-

A brief review of principal features of the studies on phytoplankton ecology in Cheju coastal waters is presented below: The publications on phytoplankton in Cheju coastal waters reaches 21 artcles from the 1933 to 1993. The great part of reports were carried out in the 1980s and the 1990s. A check-list of phytoplankton species in Cheju coastal waters are more than 428#species belonging to 128 genera, that is, 8 genera 10 species of blue-green algae, 1 genus 1 species of crytomonads, 31genera 116 species of dinoflagellates, 3 genera 6 species of silicoflagellates, 81 genera 291 species of diatoms, 1 genus 1 species of chloromonads, 2 genera 3 species of euglenoids and 1 genus 1 species of green algae. The dominant species are centric diatoms, Skeletonema costatum, Chaetoceros diadema, Ch. socialis and Ditylum brightwellii, through the year, while they are dinoflagellate, Prorocentrum triestinum and chloromonad, Heterosigma akashiwo in the summer seasons and pennatic diatom, Bacillaria paxillifer in the winter seasons. Cell density of phytoplankton standing stock fluctuated between 1.8×10³cells/1 in winter and 1.2×10 cells/1 in summer, and the annual average works out at roundly 105 cells/1 . Seasonal variation of phytoplandton communities are occupied by the small diatoms in spring, while by the largely species in the warm seasons. The occurrence of primary productivity maximum in the spring is associated with diatom blooming and the annual average indicates 274 gC/㎡/year in Cheju coastal waters.

하계 실내 및 실외환경의 공기 중 휘발성 유기화합물 농도 및 개인노출

양원호,손부순,박종안,장봉기,박완모,김윤신,어수미,윤중섭,류인철 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9

Volatile organic compounds (VOCs) are present in essentially all natural and synthetic materials from petrol to flowers. In this study, indoor and outdoor VOCs concentrations of houses, offices and internet-cafes were measured and compared simultaneously with personal exposures of each 50 participants in Asan and Seoul, respectively. Also, factors that influence personal VOCs exposure were statistically analyzed using questionnaires in relation to house characteristics, time activities, and health effects. All VOCs concentrations were measured by OVM passive samplers (3M) and analyzed with GC/MS. Target pollutants among VOCs were Toluene, o-Xylene, m/p-Xylene, Ethylbenzene, MIBK, n-Octane, Styrene, Trichloroethylene, and 1,2-Dichlorobenzene. Indoor and outdoor VOCs concentrations measured in Seoul were significantly higher than those in Asan except Ethylbenzene. Residential indoor/outdoor (I/O) ratios for all target compounds ranged from 0.94 to 1.51 and I/O ratios of Asan were a little higher than those of Seoul. Relationship between personal VOCs exposure, and indoor and outdoor VOCs concentrations suggested that time-activity pattern could affect the high exposure to air pollutant. Factors that influence indoor VOCs level and personal exposure with regard to house characteristics in houses were building age, inside smoking and house type. In addition insecticide and cosmetics interestingly affected the VOCs personal exposure. Higher exposure to VOCs might be caused to be exciting increase and memory reduction, considering the relationship between measured VOCs concentrations and questionnaire (p<0.05).

제주북방, 함덕 연안해역에 있어서 식물플랑크톤 군집의 계절변동 특성

윤양호,노홍길,김영기 제주대학교 해양연구소 1992 해양자원연구소연구보고 Vol.16 No.-

Field survey for oceanographic conditions and the seasonal succession of phytoplanktan were carried out in the Hamdok port from April 1989 to February 1990. Water temperature ranged between 11.4℃ in January and 27.3℃ in August, and salinity fluctuated greatly, with a maximum of 35.6960 in August and minimum of 21.8% in April. A total of 120 species of phytoplankton belonging to 69 genera were observed in which, at least, 8 genera, Oxyphysis, Amphidinium, Cochlodinium, Torodinium, Nematodinium, Katodinium, Ebria and streptoheca are first records in the Cheju coastal waters. The predominant species are centric diatoms. Skeletonema costatum, Chaetoceros spp. through the year, while they are unarmoured phytoflagellates, Heterasigma akashiwo, Gymnodiniurn sp., Gyrodinium sp. in warmer seasons. And phytoplankton cell number fluctuated between 4.1~10^(3) cells/l in winter and 2.4~10^(4) cells/l in spring blooms, and it was under the control of centric diatoms for a year. On the other hand, it is occupied by phytoflagellates including some unarmoured dinoflagellates in summer season.

효과적인 다차원 분석을 지원하는 스트레드시트 방식의 OLAP 인터페이스 설계 및 구현

윤민희,김진호,문양세 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

OLAP systems support effectively data analysis over a large volume of business data to make decisions for an enterprise. In order to process data analysis efficiently, OLAP systems pre-compute the summary of business data over various dimensions and store them into data warehouses. Several specialized tools have been developed to display and to browse the results of complex analytical queries on data warehouses. In this paper, we developed a spreadsheet-like tool to support OLAP operations and to browse the results of analytical queries. Spreadsheet is one of the most popular and user-friendly data analysis tool. It also has lots of advantages, which is interactive, easy to learn, etc. Thus this paper implemented an OLAP tool using spreadsheet-style interface to analyze large OLAP data on World-Wide Web. Through this tool, users can process OLAP activities easily and effectively by using the same ways as well-known shreadsheet tools like Microsoft Excel.

주성분분석에 의한 거금수도의 수질환경 및 식물플랑크톤 변동 요인 해석

윤양호,박종식 한국환경과학회 2000 한국환경과학회지 Vol.9 No.1

A study on the variational characteristics of water quality and phytoplankton biomass by principal component analysis(PCA) was carried out in Kogum-sudo from February to October in 1993. We analyzed PCA on biological factors such as chlorophyll α and phytoplankton cell numbers for centric and pennate diatoms, phytoflagellates, and total phytoplankton as well as physico-chemical factors as water temperature, salinity, transparency, dissolved oxygen(DO), saturation of DO, apparent oxygen utilization(AOU), chemical oxygen demand(COD), nutrient (ammonia, nitrite, nitrate, phosphate and silicate), N/P ratio and suspended solid(SS). The source of nutrients supply depended on the mineralization of organic matters and inputs of seawater from outside rather than runoff of freshwater. The phytoplankton biomass was changed within short interval period by nutrients change. And it was controlled by the combination of several environmental factors, especially of light intensity, ammonia and phosphate. The marine environmental characteristics were determined by the mineralization of organic matters in winter, by runoff of freshwater including high nutrients concentration in spring, by ammonia uptake and high phytoplankton productivity in summer, and phosphate supplied input seawater from outside of Kogum -sudo in autumn. And Kogum-sudo was separated with 2 regions by score distributions of PCA. That is to say, one region was middle parts of straits which was characterized by the mixing seawater and the accumulated organic matters, other one region was Pungnam Bay and the water around Kogum Island which was done by high phytoplankyon biomass and productivity year-round.