1950년대 한미합동경제위원회의 운영과 역할

이현진 한국민족운동사학회 2006 한국민족운동사연구 Vol.48 No.-

The operation and roles of Combined Economic Board in 1950s’Lee, Hyun Jin 1950년대 한미합동경제위원회의 운영과 역할이현진

LMDS대역을 위한 광대역 마이크로스트립 패치 안테나 설계

이현진,김태홍,임영석,Lee, Hyeon-Jin,Kim, Tae-Hong,Im, Yeong-Seok 대한전자공학회 2000 電子工學會論文誌-TC (Telecommunications) Vol.37 No.10

마이크로스트립 패치를 이용하여 안테나의 대역을 증가시키는 방법이 꾸준히 연구되고 있다. 본 연구에서 구형 패치를 이용하여 LMDS용 안테나를 설계하기 위하여 패치의 구조를 변형시킨 형태로 구형 패치 외부 에 밴드를 설치하여 프린징 효과에 의한 전자계의 외부 발산을 최소화하였으며, 이로 인한 안테나 효율의 증가와 원하는 대역의 안테나의 설계 파라미터 값과 실제 시뮬레이션 결과와의 차를 줄일 수 있는 장점을 갖고 있다. 또한 종래의 적층 패치 안테나구조에 비하여 본 연구에서 제시한 외부 밴드를 갖은 구조의 대역폭이 더 넓어짐을 확인 할 수 있었다. There has been a constant effort to study methods for increasing the bandwidth of antenna by microstrip patch. In this paper, we propose a special type of the external rectangular patch, for design and analysis of an antenna using a local multi-point distribution system (LMDS). We minimized electromagnetic emissions from the fringing effect. As a result, we obtained an increase in antenna efficiency and frequency bandwidth. We were also able to design the wide band antenna easily, because of the difference in parameter between the aimed and the simulated antenna was reduced greatly. In comparison with the rectangular patch antenna, the banded one has a wider bandwidth.

공동체 돌봄으로서 사회적 농업의 특성 : 완주와 제주의 사회적 농장 사례를 중심으로

이현진,김흥주,김자경 한국농촌사회학회 2024 農村社會 Vol.34 No.1

한국에서 사회적 농업은 정책적으로 빠르게 추진되고 법 제도가 정비되면서 양적으로 성장하였지만, 사회적 농업 실천 현장에서 느끼는 정체성의 혼란은 가중되고있다. 농업과 돌봄 활동이 한 공간에서 이뤄지기 때문이다. 이 연구의 목적은 사회적농업의 정책과 제도화 경로의 과정에서 사회적 농업의 정체성 확립을 위해 사회적농업이 나아가야 할 방향과 가치를 공동체 돌봄의 논의를 통해 파악하는 것에 있다. 이를 위해 첫째, 사회적 농업의 정체성을 구축하는데 중요한 개념인 공동체 돌봄에대해서 분석했다. 공동체 돌봄은 개인과 가족에게 지워진 돌봄을 국가와 시장에만의존하지 않고 지역에서 함께 대응하는 것이다. 공동체 돌봄의 특성으로 사회적 농업의 정체성을 정리하면 다음과 같다. 사회적 농업은 당사자와 지역주민이 지역에서 더불어 살아가는(주체성) 일상 속에서, 서로 의지하면서 다양하게 상호지원할 수있는 연결망을 구축하고(연결성), 연결된 이들이 강한 유대감을 형성하거나 느슨하지만, 친밀감을 느낄 수 있도록 농업 활동을 통해 교류하는(관계성), 사회 인프라로서 돌봄의 장(자산기반성)이라 할 수 있다. 둘째, 공동체 돌봄의 특성을 4가지로 추출하여, 이 특성이 실제 사회적 농업을 실천하는 현장에서 어떻게 구체화하는지 완주와 제주의 사회적 농장 사례를 분석했다. 두 곳의 사례를 통해 공동체 돌봄의 특성이공통으로 발현되는 것을 확인할 수 있었다. 즉 지역주민들이 핵심 주체로 등장하며, 농업과 비농업 분야와 다양한 연결망을 형성하고 있는 것을 확인할 수 있었다. 결속적 관계를 통해 사회적 농장의 지속가능성을 담보하고, 교량적 관계를 통해 참여자들의 삶의 변화를 가져오기 시작했다. 그리고 돌봄의 장소로서 농장은 지역 공동체의 소중한 자산이 되고 있음을 확인할 수 있었다. 사회적 농업은 공동체 돌봄으로서가능성을 보이는 것은 확실하다. 물론 이 연구에서 다루지 않은 사회적 농업 현장에서 겪는 어려움도 상당히 많다. 이 연구 결과를 통해 사회적 농업의 실천 현장에서느끼는 혼란을 해소하는 데 다소나마 도움이 될 수 있기를 기대한다. In Korea, social agriculture has experienced rapid quantitative growth and institutionalization through policy initiatives and legal frameworks. However, there is increasing confusion regarding the identity of social agriculture in practical settings due to the convergence of agricultural and care activities within the same space. The objective of this study is to establish the identity of social agriculture during the process of policy and institutionalization by understanding the direction and values it should pursue through discussions on community care. To achieve this, firstly, the concept of community care, which is crucial for constructing the identity of social agriculture, was analyzed. Community care involves collectively addressing care needs in the local community rather than solely relying on the state or market. Summarizing the identity of social agriculture through the characteristics of community care, we can define it as follows: (Agency) Stakeholders and local residents living together in the community's everyday life. (Connectivity) Building interconnected networks enabling diverse mutual support, relying on each other. (Relationality) Fostering a strong sense of solidarity or, albeit loose, intimacy among connected individuals through agricultural activities. (Asset-based community care) Serving as a social infrastructure for care. Secondly, four characteristics of community care were extracted and analyzed through case studies of social farms in Wanju and Jeju to understand how these characteristics are embodied in the practice of social agriculture. The analysis revealed that these characteristics are commonly manifested in both cases. Local residents emerge as central agents, forming diverse networks across agricultural and non-agricultural domains. Through enduring relationships, social farms ensure sustainability, while transitional relationships initiate changes in participants' lives. Moreover, as sites of care, farms emerge as valuable assets to the local community. It is evident that social agriculture holds potential as a form of community care. However, it's worth noting that there are significant challenges faced by social agriculture in practical settings, which were not extensively covered in this study. It is hoped that the findings of this research will contribute, albeit to some extent, to resolving the confusion experienced in the practical implementation of social agriculture.

『右大臣實朝』에 나타난 사네토모(實朝)의 인물 분석

李賢珍 한국일본학회 2002 日本學報 Vol.51 No.-

ISM대역용 마이크로스트립 패치 배열 안테나 설계

이현진,임영석 대한전자공학회 2004 電子工學會論文誌-TC (Telecommunications) Vol.41 No.8

In this paper, we are designed and fabricated circular polarization microstrip patch antenna of 5[GH]z bandwidth for the wireless LAN and the ISM. We are proposed new structure that removed the section which intersected at a right angle and were composed to four separated slots. The antenna of proposed structure could solve parasitic elements from intersected in a right angle and weak coupling efficiency from asymmetry between feed line and a slot. The proposed cross slots antenna is easily impedance matching and increased impedance bandwidth. Also this is increased efficiency and a bandwidth of antenna and reduce back lobe of radiation pattern. We designed 2${\times}$2 array antenna of 5[GHz] band. It took impedance bandwidth 280[MHz](VSWR < 1.5) and gam 12.5[dBi] 본 논문에서는 무선LAN 및 ISM용을 위한 5[GHz]대역 원편파 마이크로스트립 배열안테나를 설계 제작하였다. 원편파를 위한 기존의 십자형 슬롯 안테나 구조를 수정하여 두 개의 슬롯이 직각으로 교차하는 부분을 없애고 분리된 4개의 슬롯으로 구성된 안테나 구조를 제안하였다. 기존의 구조에서 급전선로와 슬롯간의 비대칭으로 전자기적 결합의 약화와 슬롯의 비대칭으로 발생되는 기생요소의 증가로 안테나 효율이 약화되는 문제가 있는 반면, 제안된 구조의 안테나는 대역폭 증가와 후방 방사의 감소를 확인하였다. 제안된 안테나는 공진 주파수가 5[GHz]대역의 2${\times}$2 마이크로스트립 배열안테나를 제작하여 최대 12.5[dBi]의 이득과 280[MHz]의 대역폭(VSWR < 1.5)를 얻었다.

광대역 이중 폴디드 마이크로스트립 안테나 설계

이현진,임영석 대한전자공학회 2004 電子工學會論文誌-TC (Telecommunications) Vol.41 No.7

본 논문에서는 MMIC 및 LTCC등과 같이 집적화 회로에 이용할 수 있는 단일 평판 구조의 광 대역 안테나를 설계 및 제작하였다. 무지향 패턴의 광대역 마이크로스트립 안테나의 새로운 구조를 제안하였다. 안테나 구조는 다이폴 안테나구조를 응용한 폴디드(folded) 마이크로스트립 안테나이며 CPW급전 방식을 사용하였다. 이 때 단일 평판구조의 접지면의 유한성에 의한 안테나 특성의 안정성에 영향을 미치게 된다. 따라서 본 연구에서 접지면을 증가시키고자 마크로스트립 루프 안테나의 외곽에 폴디드 구조의 접지면을 확장하였다. FDTD방법을 이용하여 안테나의 특성을 해석하였다. 제안한 안테나는 PCS 대역(1.75∼1.87㎓)과 IMT2000(1.92∼2.17㎓) 대역 및 ISM 대역에 적합한 주파수 대역을 얻었다. In this paper, a single plane wide band microstrip antenna for integrated circuit as MMIC and LTCC is designed and fabricated. A new configuration for a wide band microstrip antenna with omni-directional pattern is proposed. This antenna consists of two rectangular folded dipoles, which are fed by a coplanar waveguide(CPW). It was effected stabilization ground that a signal plane of CPW feed have been limited ground plane. Therefore, a ground plane of folded structure should be extended outside folded antenna in this research. The characteristics of the proposed antenna were analyzed by using an FDTD methods. The return loss and radiation patterns were simulated and measured. The proposed antenna is get 120MHz bandwidth of PCS band and 250MHz bandwidth of IMT2000 band, used ISM band.

Fe₂O₃가 코팅된 판상 mica의 적외선 반사용 적색안료 제조 및 차열도료의 열특성

이현진,김대성,이승호,임형미,최병기,강광중,정재일,조금성,Lee, Hyun Jin,Kim, Dae Sung,Lee, Seung-Ho,Lim, Hyung Mi,Choi, Byung-Ki,Kang, Kwang-Jung,Jeong, Jae Il,Cho, Kum-Sung 한국재료학회 2015 한국재료학회지 Vol.25 No.2

$Fe_2O_3$ coated plate mica($Fe_2O_3$/mica) for infrared reflectance red pigment was prepared under hydrothermal treatment. $Fe_2O_3$ was perfectly coated on mica via the difference of surface charge between $Fe_2O_3$ and mica particles at pH 3. $Fe_2O_3$/mica was then calcined at $800^{\circ}C$ to stabilize the coated layer on mica. The infrared(IR) reflectance pigments were characterized by X-ray diffraction, FE-SEM, zeta potential, and a UV-Vis-NIR spectrophotometer. In particular, the CIE color coordinate and IR reflectance properties of $Fe_2O_3$/mica pigments were investigated in relation to the thickness variation of the $Fe_2O_3$ layer coated on mica of various lateral sizes. The isolation-heat red paints containing the pigments were prepared and optimized with a thinner, settling agent, and dispersant. Then, the films were made. The thermal property of isolation-heat on these films was observed through the relationship of the IR reflectance value, which was based on the variation of the $Fe_2O_3$ layer's thickness coated on mica and mica's lateral size as IR reflectance pigment. With an increase in IR reflectance on these films, the thermal property of isolation-heat was effectively enhanced.

전주지방 배추흰나비(Pieris rapae L.)의 염색체

이현진,김창환 한국곤충학회 1976 Korean journal of entomology Vol.6 No.1

전주지방에서 채집한 Pieris rapae의 5령 유충의 정모세포에서 핵형분석을 하였다. Pieris rapae 는 n=25인 개체와 n=26인 개체가 있는데 전자는 62.7% 후자는 39.2%의 비율로 분포되고 있다. n=25인 개체의 핵형은 중부 15차중부 7단부염색 3체개로서 구성되어 있다. n=26인 개체는 m-염색체 1개를 더 가지고 있다. The chromosomes of the Pieris rapae from Chonju were observed in meiotic Spermatocyte with application of the aceto-orcein squash method. There were two types of the chromosome number represented by n=25 and 26, and the distribution ratios were 35% and 65% respectively. The karyotype of n=25 individuals were described of metacentric 15, submetacentric 7 and terocentric 3, in chromosome numbers while those of n=25 individuals had one exceptional m-chromosome.

부분 집합 원리의 심리적 실제

이현진 한국정보과학회 언어공학연구회 1990 한국정보과학회 언어공학연구회 학술발표 논문집 Vol.1990 No.11

시지각 능력 향상을 위한 소묘학습 프로그램 개발 : 초등학교 4학년을 대상으로 4th Graders in an Elementary School

이현진 이화여자대학교 교육대학원 2000 이화교육논총 Vol.11 No.-

The purpose of this study is to develop a curriculum that helps elementary school students draw rough drawings better. Human being has been lived seeking the beautiful. Even graffiti is a way of expressing ourselves. We express our thoughts or feelings by using dots, lines, surfaces, forms, and colors. However, most people think that art is not for them, but for some artists. No wonder they usually don't care about art. It's partly due to current art education system that focuses on "expressing process." Students have been taught to make their efforts only to improve their ability in expression, without learning methods of using tools materials, visual sense and perceptibility. That's why I developed a program of enhancing rough drawing abilities for elementary school students. Rough drawings are the basic activity that takes a big part of art activities. The better students have their abilities in expressing themselves with rough drawings, the more students can lift up their artistic abilities. The program is based on Tyler's Educational Developmental Model that includes the establishment of educational objective selecting and organizing educational contents and evaluating learning experience. The program is in line with the needs of teachers, students, and social situation. Elementary school students become to have physical function to objectively grasp the structure and shape of an object and express it by the development of visual sense and perceptibility. The goal of the program is "to make students have their eyes for the beautiful, to teach them how to use their visual sense and perceptibility and artistic knowledge with the program." It includes the ways of teaching students about how they use dots, forms, brightness, proportion, expressing specifically, how to use their perception, feeling and psychological fields towards drawing space. All of these elements are related to each other. The time break between classes is about one to three hours and it's flexible. Teachers could have their students make some plans for drawings, especially pencil rough drawings. It could makes students get more excited about drawings. It also includes some activities - students need to talk about drawings and learn about artistic facts, and they are taught how they can express their feelings or thoughts with an aesthetic point of view, and students draw some objects, and they evaluate their drawings. The program was applied to 40 students who are fourth graders at H elementary school in Seoul. The program was revised constantly when there were problems with it during the practice period. Students had essay tests in "perception field" after the program was finished. Students estimated their works and teachers observed their student's works in "feeling field" Students got their scores based on their portfolios in "psychological field." SPSS/PC+, a statistic program, were used to analyze the test results, using t verification. First, students had essay tests that they need to find something wrong on some drawings, which is useful for evaluating whether students are capable of having "perception" abilities. The test gave the students their percentile award points. Second, the students were marked based on how they keep their interests, how they use their knowledge, how they cooperate well each other, how much they respect drawings, using the students' evaluation and teacher's check lists. Third, the students' drawings were given marks according to their works when they were in classes for chapter 1 & 7. The results are as follows: there was significant difference (p<.01) between the students in the treatment group and in the control group. The results turned out well with the essay test, self-evaluation test, teacher's observation tests, and students' works. This is a proof that the program performed in this study is a better way of fostering rough drawing skills for students than the existing traditional system.