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대칭적인 유전체 메타표면에서 나타나는 가시광선 영역의 높은 품질계수 공명 모드
최보성,정지윤 한국물리학회 2022 새물리 Vol.72 No.1
유전체 메타표면의 미 공명 모드는 광발광 및 비선형 광학 현상 등 빛과 물질의 상호작용을 증폭하는데 활용이 될 수 있으며, 증폭되는 정도는 공명 모드의 품질계수에 강하게 의존한다. 메타표면에서 높은품질계수의 공명 모드를 얻는 가장 잘 알려진 방법은 대칭적인 진동자에 미세한 비대칭성을 도입하여연속체 속 속박상태를 깨는 것이다. 다만 이와 같은 방법으로 메타표면을 제작하는 것은 기술적으로매우 어려울 뿐 아니라 유도되는 근접장의 분포가 매우 복잡해지는 단점이 있다. 본 연구에서는 완전히대칭적인 형태의 진동자로 이루어진 메타표면에서도 높은 품질계수의 공명 모드가 나타날 수 있음을보이고 이를 분석하였다. 정사각형 도넛 모양의 진동자에서 양변의 길이와 구멍의 크기를 조절하면품질계수를 조절할 수 있음을 확인했으며, 최대 243,290의 품질계수를 이론적으로 얻을 수 있었다. 이처럼높은 품질계수는 2차원 구조에서 발생하는 토로이드 쌍극자와 자기 사중극자 사이의 상쇄간섭으로 인해연속상태 내 속박상태가 형성되기 때문임을 확인하였다.
지역 인물기념관의 대중관람 활성화 방안: 의암류인석기념관을 중심으로
최보성,지윤호 (사)한국관광레저학회 2023 관광레저연구 Vol.35 No.-
The local personnel memorial hall is difficult to attract public attention and interest because it is located geographically far away and has a stereotype of a reverent and solemn atmosphere. Exhibitions and hands-on activities should be revised and supplemented to suit the views and needs of the public, and it is necessary to develop historical content that arouses interest that can offset geographical disadvantages. The purpose of establishing the Personnel Memorial Hall of the Memorial Facility shall be maintained. However, it shall be activated as a space for natural self-introspection in relaxation, walking, and outing by providing sufficient opportunities for psychological and physical access to provide participants with fun and historical interest. As a way to induce and revitalize the revisit of public visitors, this study presented four major strategic categories: expanding memorial research, raising historical awareness of visitors, creating a leisure culture for visitors, and revitalizing memorial education programs. In conclusion, it is necessary to develop historical content that the public can be interested and interested in, create an easily accessible space, and devise activation measures to induce revisi
중년여성에서 등속성 운동 시 세트간의 휴식시간이 등속성 근기능 및 생리적 변인에 미치는 영향
최보성,한상완 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.3
The purpose of this study was to investigate the effects of resting periods between exercise sets during isokinetic contraction on recovery from muscle fatigue, strength, heart rate, blood pressure, and lactate level. Sixteen women performed 10 repetitions of isokinetic exercise for three sets in three different conditions. During the sets, they rested 50, 100, and 150 seconds in each condition. And the results were: 1) In this population, the peak torque of extensor during the isokinetic exercise in 100 second resting condition was significantly higher than that in 50 and 150 second resting conditions (p<.01). The total work of extensor was significant in the second and third sets in 50 and 100 second resting conditions (p<.01). 2) During the isokinetic exercise, the heart rate was progressively increased as the sets were advanced in all resting conditions (p<.01). And the increase was significant during the second and third sets than the first in 50 second resting condition (p<.01), while it was significantly greater after the third set than the first in 100 and 150 second resting conditions (p<.01). 4) No difference was found between the resting periods in blood lactate level and blood pressure during the isokinetic exercise. However, differences were found between the sets in these variables (p<.01).
Upform 공법을 이용한 사이드 실 인너 패널의 스프링백 저감
최보성(Bosung Choi),김목유(Mokyou Kim),주재혁(Jaehyck Joo),이덕영(Dugyoung Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Springback, an elastic material recovery after the unloading of stamping tools, causes variations and inconsistencies of final part dimensions. The higher the tensile strength of steel sheets goes up, the larger the springback of them occurs. Recently, automotive industry has given much more attention to high-strength steel sheets in order to obtain high fuel efficiency and impact safety. To reduce springback of steel sheets, upform method is proposed. Its main concept is to strike the end of steel sheets normally during stamping process. The feasibility of upform method is verified by stamping analysis of side sill inner panel using PAMSTAMP 2G. The portotype sample panel is made by press steel die and the analysis data is compared with the measurement data of 3D CMM.