Anomalous Beam Splitting Phenomena Based On Negative Refraction in Photonic Crystals

Chung, Kyo-Bang,Kim, Ahyoung Research Institute of Science and Technology HONGI 2005 Hongik Journal of Science and Technology Vol.9 No.-

We report an anomalous Y-branching phenomenon for normal incidence of light, in a 2D photonic crystal composed of dielectric rods arranged on a square lattice in air. From the calculation of the band structure and the corresponding equi-frequency contour, we examine the origin of this anomalous beam splitting. By performing the finite-difference time-domain simulation, we present the time evolution of the electromagnetic wave for the Y-branching phenomenon.

해방전 이북지역 개신교 주요인물 및 종교지형 연구: 주요인물의 상호관련성 및 ‘기독교 민족주의’ 사상 공유를 중점으로

정교진 ( Kyo Jin Jung ),임호정 ( Ho Jung Lim ) 기독교학문연구회 2022 신앙과 학문 Vol.27 No.1

It was none other than Protestantism that became the medium of progress against Neo-Confucianism in the northern region after the enlightenment period. The leaders of the major forces in the northern region specifically addressed in this study, such as Ahn Chang-ho, Cho Man-sik, Han Kyung-Chik, Kim Kyo-shin, and Kim Chai-joon, can be referred to as Korean Protestant nationalists. In some respects, “Christian nationalism” can be said to be the common denominator of these Protestant leaders. This ideology has a strong antagonistic character to 'exclusive nationalism' based on Neo-Confucianism. Of course, early nationalists like Ahn Chang-ho were under the inf luence of Neo- Confucianism. However, as they came into contact with Christianity, they grafted nationalism into the Christian faith and advocated “Christian nationalism.” It is a fact that the “Christian nationalism” established by early Christian nationalists under the influence of conservative theology also had some influence on the Protestant leaders who pursued liberal theology. It appeared as a movement to establish a national identity and capacity-building movement. However, the religious landscape in which they stood was clearly different, and due to this influence, conservatism and liberalism are still on the opposite side until today in Korean Protestantism. Nevertheless, both early Protestant leaders dreamed the same dream which is self-reconstruction and society-reconstruction, further national-reconstruction, and nation-reconstruction through Personality discipline and capacity-building based on the spirit of 'Christian nationalism' and in a larger category 'nationalism'.

선비정신의 비극적 淨化

이경교 동국대학교 국어교육과 1994 동국어문학 Vol.6 No.-

江原道 旌善郡의 地名에 관한 연구 : 촌락명을 중심으로

文恩京,盧美慶 동국대학교 지역환경연구소 1994 地域環境 Vol.- No.12

굴착 주변의 지반침하 예측

김교신,류제천,김송만,박춘수 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.2

Ground settlement and displacements of support structures due to deep excavation in urban area affect the stability of adjacent structures and retaining walls. Especially, the magnitude and distribution of ground settlements may directly give effects on the behavior of adjacent structures. So it comes to be important to judge precisely the effects on adjacent grounds and structures due to excavation. This can be achieved by means of ground settlements and differential settlements of structures, but present evaluating method on the ground settlement neglect the presence of adjacent structures. In this study, I have made Bowles and Bauer Method programs in order to find adjacent ground settlements. The results of program are like these. First, when you use measured horizontal displacement, the ratio of settlements of Bowles Method programs to Bauer is 0.86. Secondly, when you use measured horizontal displacement, settlements which Bowles Method program find is 5 times larger than settlements which Bauer Method program find when you use evaluated horizontal displacement.

Clay 또는 은 나노 입자를 함유한 불포화 폴리에스테르 수지의 물성에 관한 연구

인교진,목진규,신동현,김주영 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

본 연구에서는 불포화 폴리에스테르 수지에 clay 또는 평균 10 nm의 은 나노 입자를 분산시켜 나노 복합체를 제조하여 그 물성 변화를 관찰하였다. clay를 함유한 나노 복합체에 대하여 XRD 분석을 한 결과, clay 층상 구조에 해당하는 회절 피크가 나타나지 않는 것으로 보아 clay의 층간 거리가 벌어져 있음을 알 수 있었다. 그러나 TEM 관찰 결과를 보면 clay 층이 완전히 박리 된 것은 아니고, clay 층 사이에 고분자 사슬이 삽입되어 있는 삽입형 나노 복합체임을 확인할 수 있었다. 또 불포화 폴리에스테르 은 나노 복합체의 경우 수지 내에 은 나노 입자가 고르게 분산되어 있음을 알 수 있었다. clay를 함유한 나노 복합체의 기계적 물성을 DMA로 분석한 결과 저장 탄성률(E´)은 최대 57% 증가함을 보였다. TGA로 분석한 열적 물성에서는 열분해 온도가 최대 18℃ 정도 증가하였다. 이는 clay가 불포화 폴리에스테르 수지의 기계적, 열적 성질에 영향을 주었기 때문인 것으로 판단되었다. 불포화 폴리에스테르 은 나노 복합체의 경우도 은 나노 입자가 고분자 매트릭스와의 상호작용으로 인해 기계적, 열적 물성이 향상되었다. 또, 은 나노 복합체의 경우 은 특유의 성질인 항균성에 있어서 매우 우수한 물성을 나타내었다. In this study, made nanocomposites that dispersed clay or silver nanoparticles of average 10 nm is unsaturated polyester resins and observed change of the properties. According to the result of XRD analysis about nanocomposites containing clay, diffraction peak that correspond to structure of layerd-clay does not appear and could know that exfoliation of distance between layerd-clay. But, seeing TEM image, layerd-clay is not exfoliated perfectly, and could confirm Intercalated Nanocomposites that polymer chain is intercalated between clay layer. Also, it could know that silver nanoparticles is dispersed in unsaturated polyester resins in the case of unsaturated polyester-silver nanocomposites. The result that analyze mechanical properties of nanocomposites which containing clay by DMA showed Storage Modulus(E´) increased maximum 57 %. Also, Pyrolysis temperature increased maximum 18 ℃ in thermal properties that analyze by TGA. Because clay influenced in mechanical and thermal property of unsaturated polyester resins. In case of UP-silver nanocomposites, advanced mechanical and thermal properties because silver nanoparticles interacted with polymer matrix. Also, it appeared properties in Antibacterial that is silver characteristic property in silver nanocomposites.

忠孝思想의 本質에 관한 硏究

池敎憲,李常容,李鐘春 淸州敎育大學校 1977 論文集 Vol.14 No.-

노인의 과거 여가활동 경험이 현재 여가심화에 미치는 영향 : Godbey의 여가정의에 따른 접근 approach of godbey's leisure definition

구교만,이은석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

This study aims at investigating the influence of past leisure activty a experience on present leisure deepening of the old. Specifically, this study aims at investigating the influence of non-participation, irregularty participation and regularity participation in past leisure activities of older adults on present leisure deepening stage from the Godbey's leisure definition. This study Were used quality research method. The subjects of this study was selected by purposeful sampling method from the non-participants and participants in leisure activities 2004 residing in Seoul area. They m re above 65 year old. The using 8 data for approach quality method. The analysis methods utilized constant comparative method form case record analysis and inductive categorical system). From the analyses of the data, this study reaches the following conclusions: Firstly, the non-participation in past leisure activities influence on present leisure deepening stage. In groups of non-participation, past leisure activities were leisure deepening stage into leisure as time. Secondly, the irregularity participation in past leisure activities influence on present leisure deepening stage. [n groups of irregularity participation past leisure activities were leisure deepening stage into a part of leisure as activity and pleasure to pursue. Thirdly, the regularity participation in past leisure activities influence on present leisure deepening stage. In groups of regularity participation past leisure activities were leisure deepening stage into value of existence definition.

錦江流域 住民의 肝吸蟲 感染에 對한 疫學的 調査硏究

安僑燦,沈雲澤 충남대학교 의과대학 지역사회의학연구소 1982 충남의대잡지 Vol.9 No.1

A study was carried out from the epidemiological aspects on the Clonorchis infection in a certain area along the main stream of the Geum River, which exercised for three times between June 10, 1980 and May 27, 1981. The subjects were chosen 6,950 people who inhabit in 49 Ri along the Geum River. For the beginning of the examination, we had intradermal test for 6,950 people. The next was the stool examinaton for 2,213 people who showed the positive reactive reaction at the first test. Finally we got the response of fheir understanding about Clonorchiasis from 1,929 by the means of questionaire among the 2,213 people who received the stool examination. The follwing results are obtained : 1. From the examination, the 31.8% of the examinee appeared to be positive in the intradermal test. The rate of male(44.7%) showed three times higer than that of female(13.3%). By the age distribution, the postive rate increased sharply in 3rd decade, reached its peak at 4th decade and decreased thereafter. By the areal distribution, the inhabitant in the upper area of the river showed positive rate more highly than the middle or lower area. 2. As a result of stool examination, the egg finding rate of Clonorchis sinensis was 45.2% among the positive reactors by intradermal test. 3. Among the subjects, the 27.3% of them did not know the infection route of Clonorchis sinensis and the 59.9% of them uneducated the health guidance of Clonorchis sinensis.

Bacillus megaterium이 생산하는 응집제어에 관하여

김교창,정준영 한국식품영양학회 1998 韓國食品營養學會誌 Vol.11 No.6

미생물 응집제 생산균주를 토양에서 분리하고 응집활성이 가장 높은 CH-23 균주를 분리하여 Bacillus megaterium CH-23으로 동정하였다. 분리균의 응집제 생산조건을 조사한 결과 수크로오스 2%, NaNO_3 3%, K_2HPO_4 0.1%, NaCl 0.5%, MgSO_4·7H_2O 0.5%, tryptone 0.01%의 구성된 배지를 pH 7.0으로 조절하고 25∼30℃에서 120rpm으로 배양하였을 때 정상기에서 응집활성이 가장 높았다. 배지에 Mn^2+(0.01% MnSO_4)을 가하면 약 57%의 응집활성이 증가되었고 Mg^2+(0.01% MgSO_4·7H_2O)와 Ca^2+(0.01% CaCO_3)도 응집활성을 48%와 33%씩 증가시켰다. Microorganisms isolated from soil were tested for their flocculating activity in kaolin suspension. Identification of the best producing CH-23 strain showed that the strain belonged to the Bacillus megaterium. The maximum production of the flocculating from Bacillus megaterium CH-23 was observed in the culture medium containing 2% sucrose, 3% NaNO_3, 0.1% K_2HPO_4, 0.5% NaCl, 0.5% MgSO_4·7H_2O and 0.01% tryptone at initial pH 7.0 and 25∼30℃. Flocculating activity was improved to 57% when the culture medium contained Mn^2+(0.01% MnSO_4). In the culture medium containing Mg^2+(0.01% MgSO_4·7H_2O) and Ca^2+(0.01% CaCO_3), flocculating activity were reached to 48% and 33%, respectively.