신호분리를 위한 Diplexer에 관한 연구

성정현,김성균,김상혁,김호섭,박준석,안달 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1

본 논문에서는 신호의 분리와 합성이 가능한 Diplexer를 제작하였다. 저역 통과 여파기와 고역 통과 여파기의 특성을 정합하여 Diplexer로 구현함으로써 신호의 분리와 합성이 가능하다는 것을 시뮬레이션을 통해 확인하였다. 또한 신호의 분리와 합성의 가능성을 입증하기 위해 실제 마이크로스트립구조의 Diplexer를 제작, 측정한 결과 각각의 통과 대역폭 내에서 0.4dB, 0.8dB이내의 삽입손실과 -20dB의 반사손실이 됨을 실험결과를 통해 알수 있었고 또한, 인덕터의 구현 방법을 마이크로스트립으로 하여 주파수 특성과 재현성을 높였다.

한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고

최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1

The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.

경연 대회를 통한 초ㆍ중고생의 창의력 신장 효과에 관한 연구

이희복,육근철,류해일,김현섭,김희수,박달원,유병환,김선효,김여상,서광수,변두원,서명석,배성효,박종석,심규철,이성희 공주대학교 과학교육연구소 2001 과학교육연구 Vol.32 No.1

미래 사회를 대비하기 위한 개인의 개성을 존중과 창의적인 능력을 지닌 인간을 양성을 목적으로 충청남도 지역의 초 ㆍ 중고등학생들을 대상으로 한 창의력 경연대회가 공주대학교 과학교육연구소에서 개최되었다. 충청남도 초 ㆍ중 ㆍ 고등학생들을 대상으로 실시한 창의력 경연대회는 창조적 아이디어를 내어 스스로 문제를 해결해 나갈 수 있는 교육 프로그램을 제공하는 좋은 기회였음이 확인되었으나, 일부의 팀에서만 참신하고 재미있는 아이디어들이 제안되었다. 여학생의 참가자 수가 상당히 증가하였으며, 대체적으로 입상권의 학생들의 상당 부분이 여학생이라는 것이 특이할만하다. 학년이 올라감에 따라서 창의적인 아이디어를 내는 양이나 질에 있어서 뒤떨어지는 것으로 분석되었으며, 토론 학습의 적응력이 미흡하고 발표력 및 청취력에 있어서도 떨어지는 것으로 나타났다. 따라서 중 ㆍ고등학교의 학교교육에서도 학생들에게 프로젝트형 탐구학습 프로그램의 적용은 물론 토론식 수습을 통한 학생들의 사고의 전환의 기회를 제공해야 할 것으로 사료된다. The creativity competition was held to foster the creativity of elementary and secondary school students in the Institute of Science Education, Kongju national University. It was found that the creativity competition effected on the improvement of inventing creative ideas and problem solving activities. But, only some competitors participated in semifinal and final contests, presented original and interesting ideas. More female students participated in competition than last year. More female participants were awarded a prize than males. Totally, participants were defective in discussion and communication, and presentation and listening ideas. Increasing grades correlated inversely with creativity and originality. There is need of inquiry project teaming programs and presenting opportunities of conversion of thinking by discussing instructions in school

消費者保護運動과 마아케팅

尙戊達,金相佑 嶺南大學校附設 社會科學硏究所 1992 社會科學硏究 Vol.12 No.2

Tomato果實의 收穫時期 調査

金聲達 대구효성가톨릭대학교 1978 연구논문집 Vol.20 No.1

This experiment was carried out to investigate the change of respiration, fresh weight moisture content, pigment content and free acid content, in order to determine the optimal harvest time of tomato fruits during growth. the results obtained were as follows: 1) Based on the climacteric pattern, the optimal harvest time of tomato fruit for storage was showed about 40th day after flowering and it coincide with the optimal harvest time based on changes of fresh fruit weight. 2) The changes of pigment content showed, about 40th day after flowering, that chlorophill content was decreased and not yet appear lycopene, and this grow stage comes under mature-green stage. 3) Free acid content gradually increased through mature-green stage to pink stage, became maximum, after that it decreased.

토마토果實의 貯藏에 따르는 Etyhlene의 生成과 物成의 變化

金聲達 대구효성 가톨릭 대학교 1988 연구논문집 Vol.36 No.1

The ethylene production and changes of texture in tomato fruits during storage was investigated to study the softening of tomatoes. Climacteric maximum of respiration was on 5days and 12days after storage at 25℃ and 15℃, respectively. the ethylene production rate was similar to respiration pattern. The content of protopectin was decreased rapidly, while the content of WSP(water soluble pectin) was increased rapidly during storage and these changes were related with respiration and ethylene production. PG(polygalacturonase) activity was increased at later stage of storage and it was seemed to bring the changes in pectic substances. The textural changes of tomato fruits during storage was made with texturem eter. Hardness was higher than fracturability at early at early stage of storage but this was reversed after middle stage, with the decreasement of hardness and fracturability, cohesiveness, adhesiveness and gumminess were decreased rapidly during storage. These changes were more rapid at 25℃ and seemed to related with changes of PG activity and pectic substances. From these results, the softening of tomato fruits during storage considered as a sequential process, i.e. ethylene triggers PG activity and PG changes pectic substances in fruits cell wall, so hardness and other textural parameters decrease during storage.

高等學校 新地球科學 敎科書의 分析的 硏究

金相達,金彦住 부산대학교 사범대학 과학교육연구소 1990 科學敎育硏究報 Vol.17 No.-

The purpose of the present study is to figure out the characteristics and differences among eight textbooks of high school ScienceⅠB (Earth Science) which are currently used in high school, by comparing and analysing the contents of them. The conclusions are as follows : 1. The contents of each unit are not much different among textbooks since they are written according to the curriculum ordinance and textbook guidelines of the Ministry of Education. However, the contents and the sizes of the newly introduced unit 1 on "Exploration of the Earth" are found to vary significantly from one to another. This unit is also found to be rather formally and inattentatively written. 2. In many instances certain identical concepts and phenomena are found to be described with different terminology in different textbooks. 3. some physical quantities are found to be described in different ways for the identical concepts and phenomena in different textbooks. 4. The amount of figures and tables are similar to each other, but two textbooks contain significantly smaller amounts. 5. Similar amounts of experiments observations and investigations are included among different textbooks, but less than half of such contents are included in two textbooks. 6. The amount of pages devoted to each field is found to be ordered as follows : Geology, astronomy, Meteorology, Geophysics, Oceanography, etc., However, the relative amount vary significantly among different textbooks A and D. This is believed to be caused by preponderance of authors in certain fields instead of balanced composition. Therefore, the education authorities are urged to unify the terminology and physical quantities that are used differently for identical concepts and phenomena by consulting with textbook writers and professional institutions so that efficient teaching and learning can be achieved in the school. In addition, considering the multi-science nature of Earth Science which emphasizes the interdisciplinary approach as well as the importance of Earth Science as a basic science, the textbook should be written without preponderating of certain field over others.

생물방제균 Bacillus subtilis YB-70이 생산하는 항진균성 항생물질의 분리 및 구조결정

김용수,손종근,문동철,김상달 영남대학교 약품개발연구소 1997 영남대학교 약품개발연구소 연구업적집 Vol.7 No.-

인삼근부균 Fusarium solani의 생육을 강력히 저해하는 생물방제균을 저병해 인삼경작지 근권토양에서 분리, 선발하여 Bacillus subtilis로 동정한 바 있고, 이 생물방제균 B. subtilis YB-70의 식물근부균 F. solani의 생육에 대한 길항기작이 항진균성 항생물질에 기인된다는 사실을 배양생산물의 분자량별 활성도 검증, 열처리에 의한 잔존 활성도 측정 등에 의해 열에 강한 저분자성 항생물질로 재확인하였고 in vivo test에서도 F.solani에 의한 근부병을 강력히 억제할 수 있음을 하였다. 생물방제균 Bacillus subtilis YB-70이 생산하는 항진균성 항생물질을 pH 침전, 용매추출, silica gel chromatography, LH-20 column chromatography 등을 통해 항생물질 YBS-1A, B로 분리, 정제 할 수 있었으며, 이 물질의 구조를 MS, NMR, amino acid analysis로 추정해 본 결과 YBS-1A는 5종 7개의 amino 산으로 구성된 itulin A 계열 항생물질로 규명되었으며, YBS-1B는 7종 11개의 amino 산으로 구성된 분자량 1,500정도의 itulin A 보다 좀 더 큰 항생물질로 추정되었다. A potential biocontrol bacterium, YB-70 was isolated from a rhizosphere in suppressive soil and identified as strain of Bacillus subtilis. In several biochemical and in vitro antibiosis tests on Fusarium solani with the culture filterates from B. subtilis YB-70, we found that antifungal mechanism of B. subtilis YB-70 was mediated by antibiotic substances produced from the bacterium. These antifungal substances were appeared to be beat-resistanl, micromolecular, and ethyl alcohol soluble. Antifungal agents produced by B. subtilis YB-70 showed strong inhibition against root-rotting fungi F. solani in in vivo pot test. An antifungal substance, YBS-1s, was purified from the culture broth of B. subtilis YB-70 by isoelectronic precipitation, silica gel column chromatography and Sephadex LH-20 column chromatography. Three antifungal agents were isolated from the culture broth of B. subtilis YB-70. Various instrumental analysis by Fab-MASS, ¹H-NMR, ¹³C-NMR, DEPT, and amino acid analyzet revealed that the YBS-1A was a peptide antibiotics of iturin class containing seven amino acids from five different groups, and the other(YBS-1B) was an analogue of iturin class containing seven amino acids from five different groups, and the other(YBS-1B) was an analogue of iturin group composed of 11 amino acids with larger molecular weight of about 1,500 dalton, which was lager than that of iturin A.

제6차 교육과정의 공통과학 및 지구과학 교육과정 내용에 관한 연구

김상달,박수경,김해동 부산대학교 사범대학 과학교육연구소 1995 科學敎育硏究報 Vol.22 No.-

The purpose of this is study to investigate the background of revision, educational objectives, organization, contents of the high school common science and earth science curriculum in the sixth curriculum, and to analyze problems of this curriculum by making a comparative study between fifth curriculum and sixth curriculum. The characteristics and problems of the common science and the solving methods for these problems are as follows. First, in regard to objectives of common science, the expression of solving capacity for real life should be changed to issues concerning phenomena and changes of environment life. Second, in regard to the contents of common science, degree of integration should be reexamined, because the present common science curriculum is integrated formally, externally. Besides, contents about science history should be included in contents of the present common science curriculum. Third, the problems in teaching common science is to produce teachers who are able to teach integrated curriculum effectively for this in-service for teachers should be implemented near-sighted and the system of science teacher education should be reorganized far-sighted. Forth, available teaching-learning model of common science should be developed for preparing effective teacher's guides and materials. The implication of this study is that it is more necessary to consider problems of sixth common science curriculum and to implement the curriculum in high school.

가공 송전선의 부식진단시스템 개발

김성덕,심재명,정원일,장석구,이승호,김영달 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1

A diagnosis method to inspect deterioration in overhead ACSR conductors is discussed in this paper. Corrosion would be occurred by various and complex factors such as atmospheric indices, installation environment and metallic configuration, but must of corrosions are mainly due to atmospheric corrosion, galvanic corrosion and crevice corrosion. Such corrosion in ACSR would lead to be zinc loss of galvanized steel strand and reduction of cross section area of aluminum strand and it may be mechanical strength of power conductor in service to reduce. Global corrosion can be treated as average corrosion occurring on the conductor and it would appear to any material variations by the elapsed years of the conductor in the atmosphere. Therefore, as estimating the loss rate of tensile strength of aged conductor corresponding to the elapsed years, it would be possible to quantify global corrosion indirectly to a prediction function. Through such results, loss degree for ACSR 97[mm2] is classified to 4 ranges. i.e., no loss, possible loss, partial loss and sever loss. Both local and global corrosion could not be detected by visual inspection, but we proposed a corrosion detector system using a solenoid eddy current sensor in order to inspect such corrosion for old conductor. Corrosion detecting system is constituted to a corrosion detector and a ground station controller. Corrosion detector consists of sensor coil and sensing head, signal processing unit, data communication system, motor driver and controller, u-processors and power supply. After considering operation and manipulation in the field, motor, battery and wheels were selected and designed in order to reduce the weight of corrosion detector. Programs for u-processors, measurement program operated in a PC were also developed. Before testing the corrosion detector in the field, several experiments were carried out in the laboratory for artificial corroded samples. Sensor performance, mechanical tests such running ability and weight, and RF data transmission as well as measurement program were examined. After testing a simple corrosion detector system in the laboratory, several filed tests were carried out in practice transmission lines installed in domestic area. Finally, the suggested corrosion detecting system shows an effectiveness to detect local corrosion in acted conductor in practice.