전국 단위 감시체계의 현황과 전망

강성규,안연순,지영구,김형옥,하미나,권호장,백남종,김성아,홍윤철,김재용,강대희,정혜선,하은희 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.2

國內飼育 犬에 있어서 心臟絲狀蟲의 感染率에 관한 調査 硏究

Ji Hee Seong(成知禧),Hwa Joong Yoon(尹和重),Won Chang Lee(李元暢),Kwang Ho Kim(金光浩),Seung Won Kang(姜承遠) 한국예방수의학회 1996 예방수의학회지 Vol.20 No.2

The purpose of this study was carried out an epidemiological survey on the prevalence rate of the canine heartworms in Seoul City and the districts of Pa-Ju, Seong-Nam and Po-Chon in Kyonggi province of Korea from September 1994 to the end of September 1995. The blood samples from 292 male and 193 female dogs (pet, 363 ; fighting dogs, 60 ; working dogs, 62) were examined for the adult heartworms cuticle antibodies using the enzyme-linked immunosorbent assay (ELSA) kits. The test was designed to detect the antibodies of the host against the specific cuticle antigens produced with the adult heartworms.

현행 중학교 과학 실험·실습교육에 대한 교사들의 견해와 개선방안

이윤종,기우항,김영호,정원우,양승영,강용희,안병호,임성규,윤일희,김중욱,강동진 경북대학교 과학교육연구소 1996 科學敎育硏究誌 Vol.20 No.-

The status of facilities, management of the experiment, practices, and Science education teaching method in middle school have been investigated. The present status and reasonable management of middle school science education have been grasped from the questionaires. The results are as follows : The reasonable management for expeiments and practices of science education were scanty in the middle school around the urban and rural schools owing to the shortage of facilities and equipments, crowded class, excessive classes, work for teachers, excessive contents of present textbook and insufficience of administrative support etc. The current teaching method of middle school science has emphasized knowledge. This fact does not satisfy the objective of learning due to lack of teaching method. Desirable directions for the improvement of present status of middle school science education were proposed in this paper.

고등학교 지구과학 실험·실습 요목 비교 분석

정원우,이윤종,기우항,김영호,양승영,강용희,안병호,임성규,윤일희,김중욱,윤성효,강동진 경북대학교 과학교육연구소 1997 科學敎育硏究誌 Vol.21 No.-

The purpose of this study is to investigate the status of the experimental and practical education in high school earth. The present status and reasonable management of the experimental and practical education in high school earth science have been grasped from the questionaires. To do this, eighty eight earth science teachers in Korea are administered questionaires. The frequency of the experimental and practical items in the seven kind of earth science text books were investigated. The problems and the reasonable management for experimental and practical education were proposed in this paper.

지구과학의 개념형성학습에 관하여 : 변화에 대한 개념을 중심으로 Especially Concerning to Concepts about Changing Phenomena

姜用熙,林成圭 경북대학교 과학교육연구소 1989 科學敎育硏究誌 Vol.13 No.-

By analyzing Earth Science textbooks currently used in high schools. we tried to establish a basic conceptual system concerning to changing phenomena based on the ESCP's structuralizing scheme. Investigating facts about time and change, we have found 21 basic concepts which should be understood through concept-forming teaching and learning. By classifying the basic concepts to fit the four principles suggested by NSTA as a scientific basic-system. we also tried to generalize the selected concepts. We made test problems in order to test high school students' understanding about earth science concepts especially concerning the changing phenomena in the field of astronomy. Using questionnaire method, we applied the test problems to 160 high school students in Taegu and Kyungpook areas. The results were as follows : the mean score of concept-learned group was 56.0 and that of unlearned group was 48.5. This means that the learned-group had been improved by concept-forming teaching.

초임계 이산화탄소를 이용하는 친환경 공정에 의한 다공성 고분자의 제조

강세란,홍성수,이민규,이석희,천재기,주창식 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3

An experimental study on the preparation of monolithic porous polymers by environmentally friend process in supercritical carbon dioxide has been carried out. Polymerization mixture composed of a cross-linking monomer, initiator and functional co-polymer was charged in the reactor with sapphire window. After the system was purged with a flow of CO₂ for 15 min, the reactor was pressurized with liquid CO₂ up to 100 bars. The reactor was isolated from and placed back to the system via quick connector for shaking until the mixture had become fully homogeneous. The reactor was then heated and pressurized to the required reaction conditions and left overnight. After cooling and CO₂ evacuation, the polymer was removed from the reactor as dry, white, continuous monoliths. The effect of experimental conditions on the physical properties of porous polymer was systematically examined, and it was found that monomer content had a major effect on the physical properties of the polymers.

원격영상강의에서 발생하는 상호작용의 빈도와 유형이 학습 동기유발에 미치는 영향

강명희,김서영 한국교육정보방송학회 1996 교육정보미디어연구 Vol.1 No.2

본 연구에서는 원격영상 강의를 시범적으로 실시하고 있는 '한국방송대학교'의 2개 강좌-사회과학 계열 1개 과목과 인문과학 계열 1개 과목-를 모국과 자국 모두 관찰함으로써 원격교육에서 상호작용이 어떠한 빈도와 형태로 나타나고 있으며 이는 학습자의 동기유발에 어떠한 영향을 미치는가를 조사하였다. Flanders의 상호작용 분석법을 활용하여 비디오로 촬영한 강좌 상황을 분석한 결과는 다음과 같다. (1) 사회과학 계열의 과목이 인문과학 계열 과목보다 교사 대 학습자 (T-S), 학습자 대 교사(S-T), 학습자 대 학습자(S-S) 상호작용이 많이 일어난 것으로 관찰되었다. (2) 모국과 자국의 비교에서는 모국이 자국에 비해 일반적으로 상호작용이 많이 일어나며, 그 유형은 교사 대 학습자(T-S) 상호작용이 주를 이루었다. (3) 상호작용이 많은 것이 학습자의 동기를 전반적으로는 유발하지 않았으나. T-S 유형은 학습자 의 주의력에 S-T 유형은 학습자의 자신감에 의미있는 영향을 주는 것으로 나타났다. The purpose of the study is to investigate the frequencies and patterns of teacher-student interaction and gain insight on the student motivation regarding interaction through two video conferencing courses being implemented at Korea Open University during the fall semester of 1995. The results revealed the lecture K provided much more interaction than lecture M. In lecture K, teacher-student interaction was prevalent. On the other hand, student-teacher interaction was more observed in lecture M. The on-site location showed more interaction than remote-site in both lecture. On-site location, teacher-student interaction was more frequently observed and student-teacher interaction was shown more in remote-site. Analysis of the relationship between interaction pattern and student motivation revealed that there was no correlation between interaction pattern and student motivation. All pattern of interaction could not be directly correlated to overall students motivations. However, it was elucidated that the Teacher-Student pattern enhanced attention of the students and the Student-Teacher pattern positively influenced confidence of the students.

만성 스트레스에 대한 뇌 및 위장관계의 Polyamine반응 : 단일성 및 복합성 스트레스의 차이 Differences between Single and Complex Type Stress

강영우,김희철,이성룡 대한생물치료정신의학회 2001 생물치료정신의학 Vol.7 No.2

Objectives : There is a hypothesis that subject may adapted to same kind repetitive stress. Polyamine(putrescine, spermidine, and spermine) is one of the stress responses in brain and peripheral organs. Therefore, we designed this study to investigate the differences between single and complex type of chronic stresses by examining the changes of polyamine levels in brain and peripheral tissues. Method : There are four groups in this study. 1) control group(n=5) : animals with no stress, 2) immobilization stress group(n=5) : animals with 10 times of immobilization stress, 3) cold-water swimming stress group(n=5) ; animals with 10 times of swimming stress in cold water, 4) complex stress group(n-5) : animals with immobilization and cold-water swimming stress. For immobilization stress(10 days), rats were placed in restrainers once daily, for 3 hours, For cold water swimming stress, rats were placed in ice-cold water once daily for 3min(10 days). For complex stress, rats were alternately underwant immobilization stress and cold swim stress, for 10 days(5 times, respectively). For polyamine analysis, polyamine extracted from brain tissue(frontal cortex and hippocampus) and gastrointestinal tract(gastric and duodenal mucosa) and measured with high performance liquid chromatography and ultraviolet detector at 242nm. Results : Putrescine levels in frontal cortex were significantly decreased by immobilitation stress and complex stress, respectively. Putrescine levels in hippocampus were significantly decreased by immobilization stress. Spermidine levels in duodenal mucosa were significantly decreased by cold swimming stress. However, spermine levels were not changed by any type of stress. There were no differences in polyamine reponses between single type and complex type stresses. Conlusions : Attenuations of putrescine and spermidine levels after chronic stresses seem to be a adaptation process of polyamine responses. In our experimental conditions, there are no differences in polyamine responses between single type and complex type stresses.

휴대 전자파 탐지기

강성준,박종연,황희용 강원대학교 산업기술연구소 2007 産業技術硏究 Vol.27 No.A

This paper presents a miniaturized electromagnetic wave detector. The dimension is reduced down to 31×18×13.5 ㎣ by using common OP-AMPs for amplification and oscillation. The strength from wave radiators is indicated by a color LED; green, orange and red colors mean the low, the middle and the high level, respectively. An alarm bell rings as the wave strength becomes above high level. The detector uses 3V battery. The detector could be used for a cellular phone decoration, a necklace pendant and a key holder.

카올린으로부터 합성된 고순도 알루미나의 γ→α변태에 미치는 Fe₂O₃첨가의 영향

강효경,박성수,박희찬 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

국내산 카올린으로부터 알루미늄황산염수화물을 합성하고, 이의 특성 및 열분해에 따른 알루미나의 γ→α변태에 미치는 Fe₂O₃의 첨가효과가 X-선회절분석, 시차열중량분석, 주사전자현미경, 플라즈마분광분석, BET법을 이용하여 검토하였다. 합성된 2 ㎛정도 크기의 판상입자형태로 구성된 고순도 알루미늄황산염은 Al₂(SO₄)₃·18H₂O로 동정되었으며, 이는 150℃ 부근에서의 탈수반응과 750℃부근에서의 탈황산반응을 경유하여 1000℃에서 결정성이 낮은 γ-Al₂O₃로 변화하였고, γ→α변태는 1200℃정도에서 일어났다. 0.1 wt% Fe₂O₃를 첨가한 경우의 1200℃하소물에서 생성된 FeAl₂O₄스피넬은 알루니마의 γ→α변태를 억제시켰으며, 그 이상의 양을 첨가한 경우와 1300℃로의 하소온도를 증가시킨 경우는 FeAl₂O₄의 α-Al₂O₃와 Fe₂O₃로의 분해 및 이온확산속도의 증가로 인하여 α-Al₂O₃생성이 촉진되었다. Aluminum sulfate hydrate has been prepared from the domestic kaolin, and its characteristics and the effect of Fe₂O₃addition on the γ→αtransformation of the resulting alumina have been investigated by means of the XRD, TG/DTA, SEM, plasma spectrometer, and BET methods. The aluminum sulfate having high purity and 2 ㎛-sized plate-like structure particles was identified as a crystalline Al₂(SO₄)₃·18H₂O, and decomposed to γ-Al₂O₃at 1000℃ via dehydration at ∼150℃ and desulfurization at ∼750℃. γ-Al₂O₃transformed to α-Al₂O₃at 1200℃. After calcination of the aluminum sulfate with addition of 0.1 wt% Fe₂O₃at 1200℃, the formation of FeAl₂O₄spinel prohibited the γ→αtransformation of the alumina. However, the addition of > 0.1 wt% Fe₂O₃and the increase in calcination temperature to 1300℃ accelerated the γ→αtransformation, due to the decomposition of FeAl₂O₄to α-Al₂O₃and Fe₂O₃and the velocity of ion diffusion, respectively.