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

주제: 소외된 학생들을 위한 과학교육의 연구와 실천 : 포스터 발표 ; 과학 탐구능력 요소에 대한 초등학교 5, 6학년 학생들의 경험적 위계 분석

이현진,백성혜 한국과학교육학회 2006 한국과학교육학회 학술발표 및 세미나집 Vol.2006 No.-

캠퍼스에서 학생들 인격에 관한 소고

이현진 한국전자파학회 2006 전자파기술 Vol.17 No.2

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.

『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.-

コミュニケーション方略の明示的指導の事例硏究 -韓国人日本語学習者を対象として-

이현진 한국일본학회 2005 日本學報 Vol.65 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.

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.

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.

녹용약침이 백서의 제2형 Collagen 유발 관절염에서 iNOS 발현과 NO 생성 억제에 미치는 영향

이현진,조현석,황민섭,정찬영,이동건,김은정,김갑성,김경호 대한침구의학회 2008 대한침구의학회지 Vol.25 No.5

Objectives : The objective of this study is to investigate the suppressing effect of the cervi pantotrichum cornu pharmacopuncture on the expression of iNOS mRNA and production of NO in synoviocytes from artificially arthritis-induced mice. Methods : In vitro test, synoviocytes extracted from a knee joint of a mouse were cultivated, and the herbal extract of cervi pantotrichum cornu(0.4㎎/㎖, 0.6㎎/㎖, 0.8㎎/㎖, and 1.0㎎/㎖) was added into the wells of synoviocytes to suppress the expression of iNOS mRNA and production of NO. In vivo test, each ten mice were allocated into three groups; Normal group, CIA-elicitated group(CIA), and group treated with cervi pantotrichum cornu pharmacopuncture after CIA elicitation(CCA). The extract of cervi pantotrichum cornu was injected into the acupoint of SP10 to observe the changes of foot thickness in mice and the suppression of MIF, TNF-α, NF-κB p65, and iNOS. Results : In vitro test, the expression of iNOS mRNA and production of NO were dose-dependently decreased in the wells of synoviocytes treated with PMA. In vivo test, the suppression of MIF, TNF-α, NF-κB p65, and iNOS was clearly shown in the pieces of the synovial joint treated with the extract of cervi pantotrichum cornu. The foot thickness also decreased dose-dependently. Conclusions : It is speculated that the cervi pantotrichum cornu pharmacopuncture can be applicable to the therapy of rheumatoid arthritis by suppressing the expression of iNOS mRNA and production of NO.