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지하구조물의 코어 압축강도를 고려한 비파괴강도 추정 결과 비교 고찰
김현우 ( Kim Hyoun-woo ),고정 ( Ko Jung ),하명호 ( Ha Myung-ho ),김준형 ( Kim June-hyeong ),박시현 ( Park Si-hyun ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
이 연구는 지하구조물의 정밀안전진단 수행 중 채취한 콘크리트 코어 압축강도 시험결과를 활용하여 코어 개수에 따른 추정강도와 기존 제안식의 추정강도들을 비교하여 신뢰도 높은 비파괴강도 평가 방안을 고찰하였다. 검토결과 코어강도 개수가 작은(년도별) 평가시 표준편차 크게 발생하며, 20개상 코어 시편 활용시 표준편차가 작아지는 것으로 확인되었다. 또한, 기존 제안식 중 일본재료학회 제안식의 결과가 가장 유사한 것으로 검토되었다.
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박시현,우종옥 한국교원대학교 과학교육연구소 1994 청람과학교육연구논총 Vol.4 No.1
In this study, with the problem of "What is the desirable illustrations?", the problem points of the existing textbooks were analyzed, and the opinions of experts concerning desirable illustrations were examined through questionaire survey, and by developing 'Analysis Frameworkof Illustrations', and Korean-Japanese 'science' textbooks were analyzed and compared with. The conclusions for the direction of korean 'science' textbooks are summarized as follows: 1) The numbers of korean illustrations should be more about two than one of per one page of the existing textbooks. 2) The korean illustrations for the 6th grade should be more largely inserted. 3) The more econmic space utilizing measure should be groped for looking at from the such side. 4) Though the kinds of Korean illustrations are mostly composed of photographs, pictures, illustrations, cartoons, etc. should be positively utilized, and the shapes of photographs should be diversified by such as square, round shape, omissions of background and others. 5) The distribution of players by sex should be considered envenly for male and female from the ascendency of male (1.5:1). 6) It was found that it is desirable for the formation of role of illustrations of 20% for motive inducement, 45% for guidance for experimentation, 30% for presentation of data, and 5% for presentation of the results of experimentation. 7) The illustrations for guidance for experimentation should present important stages of experimentation process regardless the number of illustration. 8) It would be advantageous for motive induction to find the subject matters as possible as from the children's close actual life. 9) It is necessary to induce more freely method in utilizing printing plate for inserting illustrations. 10) It is the result of research that the existing Korean textbooks are not suitable in inducing interest, and the positive strategy to induce interest is demanded. 11) It is required to select their location freely in accordance with the content regardless the. 12) In order to develop such illustrations, it is required to cultivate expert illustrators, and more economic investment is required for development of illustrations, The emphasis matters of revision of the 6th educational process of 'Inducement of study motive and emphasis on interest' is the change of presenting form and method of illustrations, which is expected to be rewarded with much good fruits.
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