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      • SCOPUSKCI등재

        (65)Pb(${Mg_{1/3}}{Nb_{2/3}}$)$O_3$-(35)$PbTiO_3$의 입자성장과 치밀화에 미치는 과량 PbO의 영향

        이종봉,허태무,이호용,최균,김도연,Lee, Jong-Bong,Hur, Tae-Moo,Lee, Ho-Yong,Choi, Kyun,Kim, Doe-Yeon 한국세라믹학회 2000 한국세라믹학회지 Vol.37 No.7

        The effect of excess PbO(0, 1, 2, 4, and 8 mol%) on grain growth and densification of (65)Pb(Mg1/3Nb2/3)O3-(35)PbTiO3 [mol%] ceramics has been investigaetd. With increasing the amount of excess PbO and sintering time, densities of sintered samples decreased gradually. The samples containing less than 1 mol% of PbO showed normal grain growth behavior, however abnormal grain growth was observed to occur in the samples with more than 2 mol% of PbO. In the samples with more than 2 mol% of PbO, the number of abnormal grains decreased and thus the average grain size became smaller with increasing the amount of excess PbO. These results demonstrated that the abnormal grain growth started to occur when a critical amount of excess PbO was added to a (65)Pb(Mg1/3Nb2/3)O3-(35)PbTiO3 sample. Since PMN-PT grains in a liquid matrix were angular, the observed abnormal grain growth was explained to proceed through the two dimensional nucleation process.

      • KCI등재

        Comparing Korean EFL International High School Learners’ English Production and Korean EFL General High School Learners’ Production: A Discourse Analysis of 11th Graders’ Written Narratives

        이종봉 한국현대영어영문학회 2012 현대영어영문학 Vol.56 No.4

        English immersion has become a highly‐acclaimed medium of instruction in South Korea, not only for English language education but content-based instruction. The international high school curriculum in South Korea, instructed by way of English immersion, and the effects of English immersion on students’ production, have also been spotlighted recently. This study was designed to investigate the effects of English immersion on L2 writing of personal narratives. By performing a narrative task L2 learners demonstrate their writing skills and styles in their L2. And by comparing international high school students’ and general high school students’ written discourse curricular differences in the use of narrative structural features may be demonstrated. The findings revealed that significant group differences are found in narrative length, events, duratives, evaluation and complicating actions. However, with regard to the proportion of narrative length, few significant differences regarding the narrative structure and evaluative devices were found between the two groups. The findings suggests that both groups’ students preferred structural elements that are similar, even though international high school students have been more exposed to the target language and its culture. However, compared with general high school students, international high school students endeavored to develop the high point of the story by producing more clauses in their narratives. The results may be used to judge or guide the further study of L2 students' discourse competence as well as to guide L2 writing instruction.

      • KCI등재
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      • KCI등재

        실험교육의 현상학적 이해: 밀리컨 기름방울 실험과 홀 효과 실험을 중심으로

        이종봉,이경호 한국물리학회 2016 새물리 Vol.66 No.7

        This study explores an alternative understanding of laboratory education that one of the researchers experienced as an instructor for a laboratory class in the Department of Physics Education. First, the researcher describes students’ different responses to two experiments - a Millikan oil-drop experiment and a Hall-effect experiment - that were included in the laboratory-class curriculum and their different experiences with the two experiments. Second, based on the instructor's experience, we discuss the limitation of current studies on laboratory activities, which have been mainly focusing on “inquiry”. Third, we try to address those limitations from a phenomenological approach (specifically, in this study, Don Ihde’s philosophy of technic). Finally, we discuss the implications of a phenomenological approach to laboratory education. 본 논문은 대학교 물리교육과 학부 학생들의 실험 수업을 지도한 연구자의 경험을 논의의 출발점으로 삼아 실험교육을 이해하는 새로운 대안을 제시한다. 우선 연구자는 실험 수업에서 이루어진 밀리컨 기름방울 실험과 홀 효과 실험에 대한 학생들의 반응 차이 및 두 실험을 통한 경험 차이를 기술한다. 다음으로, 연구자는 이러한 경험을 근거로 “탐구”를 중심 주제로 진행되어온 기존의 실험교육 연구들의 주된 논의 내용과 제한점을 검토한다. 세 번째로, 연구자는 실험교육에 관한 논의의 한 가지 대안으로서 Don Ihde의 기술철학을 중심으로 한 현상학적 접근의 가능성에 관하여 논의한다. 마지막으로 연구자는 실험교육에 관한 현상학적 접근이 갖는 과학교육적 의의에 관해서 논의한다.

      • KCI등재

        韓末 度量衡制의 개혁과 성격

        이종봉 동아대학교 석당학술원 2016 石堂論叢 Vol.0 No.64

        The reform of the weights and measures system in the late Korean Empire is summarized as follows. First, because the weights and measure system in the 19th century have had a variety of problems in its production and usage process, its reorganization plan was to be presented. Its first reform proceeded during the Gabo Reformation period. One the one hand, the government abolished Pyongsiseo(平市署) and made the Gongeobgwa(工業課) in Sanggongguk(商工局), Nongsangamun(農商衙門) administer the weights and measures system as a part of the reform of government organization. In line with this, although the government intended to revise the system, the actual reform was not conducted at all. In this process, the western metric system became a center of attention as a possible alternative. Second, the Korean Empire established Pyongsikwon(平式院) as an affiliated organization of Gungnaebu(宮內府) and issued regulations for the weights and measures system in order to prosecute its reform in 1902. Even though the regulations, which stipulated that measurements were to be written using metric system, were supposed to be implemented from July 1 of the following year, the reform could not be implemented due to the limitations in the production of tools for the system. The regulations were legislated based on Japanese weights and measures system law. Third, after the repeal of Pyongsikwon, Pyongsikgwa(平式課) in Nongsanggongbu(農商工局) was in charge of controlling the weights and measures system. Nongsanggongbu promulgated the law of the weights and measures system in the first law in order to reform the system on March 1905 and the government operated its secretariat from November of the same year. It seems that this law was partly in effect for some regions around Seoul and Incheon, considering that the new tools for the weights and measures system were sold in the number of 240,000 in the late October around those areas. In addition to this, the petitions to revise the law were filed on December 1905. Consequently, the government distributed the law of weights and measures system in the 26th law on September 20, 1909. This law started to implement in the partial areas of Seoul and Gyeonggido from November 1, 1909 and then were applied in Gangwondo, Hamgyeongnamdo and Hamgyeongbukdo, which means that the law could be implemented universally throughout the Korean peninsula. To sum up, the history of the weights of measures system underwent substantial changes during the late Korean Empire period: the regulations of 1902 stipulated the measure(尺) based on the Japanese measure(曲尺); the law of 1905 standardized the unit system and volume of tools with those of Japan; the law of 1909 unified the unit system and weight based on the Japanese unites, Mun(匁) and Gwan(貫); in addition, the square measures—Gyeol(結), Bu(負), Sok(束), and Pa(把)—were replaced with Pyeong(坪) and Jeong(町); the law of 1909 accepted the Japanese unit system of the law of Cheokgwan(尺貫法). 19세기 도량형은 여러 문제들이 나타났는데, 이를 개혁하기 위한 방안이 제시되었다. 첫 번째 도량형의 개혁은 갑오개혁 때 추진되었는데, 하나는 平市署를 폐지하고 농상아문 상공국 工業課에서 도량형을 관장하게 하였고, 다른 하나는 도량형의 개혁이었는데, 이는 도량형의 개혁을 시도하였지만, 전혀 이루어지지 못하였다. 이에 따라 도량형의 문제점에 대해서는 계속 제기될 수밖에 없었고, 갑오개혁 이후 『獨立新聞』을 비롯한 신문에서 도량형의 개혁을 요구하였는데, 이를 해결하는 대안으로 서구의 미터법에 대한 관심이 많았다. 대한제국은 1902년 궁내부 관하에 도량형을 관장하는 平式院의 설치하였고, 도량형 규칙을 반포하여 도량형 개혁을 추진하려 하였다. 각 단위에 미터법의 명칭을 병기한 도량형 규칙은 끝내 도량형 개혁을 이루지 못했다. 도량형 규칙은 일본의 법률 제3호 도량형법을 참고하여 제정되었는데, 1904년 평식원이 폐지되면서 계속 추진할 수 있는 동력을 상실하였을 뿐만 아니라 量器更定의 문제가 제기되면서 새로운 법안으로 대체될 수밖에 없었다. 농상공부는 도량형 개혁을 위해 법률 제1호의 도량형법(1905.3)을 반포하였고, 동년 11월 1일부터 동법을 시행하기 위해 도량형법사무국 직제를 운영하였다. 각 단위에 미터법의 명칭을 함께 병기한 동법은 그해 10월말 24만여개의 도량형기를 제작하여 서울과 인천지역에 판매한 점을 고려할 때 이 지역에서 일부 시행되었다고 보아야 한다. 그런데 1905년 12월 11일 도량형법 개정 청의서가 제출되었는데, 형제를 통일하기 위해 1909년 9월 20일 법률 제26호의 도량형법을 반포하였다. 도량형법은 1909년 11월 1일부터 서울과 경기도의 일부 지역에서 실시되었고, 그 후 연차적으로 시행하다가 1912년 전면적으로 시행되었다. 1909년의 도량형법은 ‘尺貫法’이란 일본 도량형의 개념을 수용하였고, 이는 우리 도량형사에 큰 변화였다.

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