• 복식
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• 제57권2호
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• pp.59-68
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• 2007

It seems that Balhae(渤海) had built up its national power through the international relationship from the early years of an establishment of a dynasty. And the envoys that were sent with the official duties dressed up the official uniform for a diplomatic courtesy. Accordingly, this study will be considered about the official uniform in the early years of the Balhae era. The system of the official uniform of Balhae was classified into two form as the starting from $739\sim742$ A.D. The official uniform of the early years of the Balhae($698\sim739$ A.D.) was based on the costume of the three Kingdoms[三國時代], that is, Yu, Go(待), Jo-u-gwan(鳥羽冠). These results were available owing to the reasons that the Balhaehad succeeded the culture of Go-gu-ryo(高句麗), which was the basis for the development of Parhae's own culture, and the most of the governing group and the ruling class in Balhaewere the drifting people from Go-gu-ryo. After that, which the 3th King Mun(文王), acrepted the Tang's culture positively, assumed the reins of government ascended the throne and the brisk exchange with Tang(唐) by the envoys and Suk-wui(宿衛) were dispatched to Tang, the official uniform of the Balhaewas transformed into the system of Tang. This system was similar to that of Tang in point of using a four colors and the items as Danryeong(團領), Bokdu.

• 한국건축시공학회지
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• 제23권5호
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• pp.547-558
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• 2023

초고강도 콘크리트의 강도와 유동성 확보를 위해 실리카흄(SF)를 사용하는 전통적인 방식에서 벗어나 산화 그래핀 나노플레이트릿(Oxidized graphene nanoplatelet, GO)와 유공유리분말( Hollow glass powder, HGP)를 사용한 초고강도 콘크리트를 개발하였고 본 연구에서는 자기수축 특성에 대해 검토하였다. 그 결과 SF를 사용한 Ref 배합보다 SF를 사용하지 않고 cGO(C사의 GO)와 HGP를 사용한 NewMix 배합의 자기수축이 13% 정도 감소하였다. NewMix의 자기수축에 의한 균열발생은 Ref 보다 1일 정도 지연되었고 균열발생 시의 인장응력은 가장 높았다. cGO의 높은 비표면적과 우수한 분산성으로 콘크리트 내의 공극들이 충전 되어 자기수축이 감소하고 cGO에 의한 균열저항 성능이 증가하여 초고강도 콘크리트의 자기수축 균열 제어에 효과가 있을 것으로 판단된다.

• Journal of Astronomy and Space Sciences
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• 제20권1호
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• pp.83-94
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• 2003

천문유초(天支類抄)는 조선시대 대표적인 천문서적으로 세종대(世宗代) 천문학자 이순지(李純之 \ulcorner-1465)가 편집하였다. 우리는 이 책의 첫 부분에서 지금까지 잘 알려지지 않은 28수(宿) 별자리를 사신-동물모양(이하 '사신동물천문도')으로 표현한 자료를 찾아 연구하였다. 사신동물천문도(四神動物天文圖)는 사방으로 나누어진 네 개의 별자리를 사신으로 잘 알려진 동-창룡(蒼龍), 서-백호(白虎), 남-주작(朱崔)그리고 북-현무(亥武)의 모습으로 표현하고 있다. 일반적인 사신과 달리 특이한 것은 백호 옆에 동양의 전설 속 동물인 기린(離離)이 같이 표현되어 있다. 각각의 동물들은 동양의 전통적 별자리 표현법인 28윤의 2 ~ 7숙의 별자리를 통해 표현되어 있다. 조선시대의 대표적 천문도인 천상열차분야지도(天象列次分野之圖)의 논설(論說)에도 나와 있듯이 고구려는 조선과 천문학적으로 많은 연관성을 가지고 있는데, 그 대표적인 것이 고구려 무덤 벽화이다. 이 벽화에 많은 별, 별자리와 함께 천문유초에서 설명하고 있는 사신동물들도 그려져 있음은 이미 고구려 시대에도 하늘을 사신동물 별자리로 보았음을 추정할 수 있다. 그래서 본 연구에서는 천상열차분야지도의 28寫와 고구려 무덤 벽화에 그려져 있는 사신과 기린을 이용해 철문유초에서 설명하고 있는 사신동물천문도도 형상화시켜 보았다.

• 폴리머
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• 제36권1호
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• pp.22-28
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• 2012

그래핀의 우수한 열적 특성을 이용하여 에폭시 수지의 열전도 특성을 향상시키며 전기 절연성질을 유지하는 기능화된 그래핀/에폭시 복합체를 제작하여 전기 및 열전도도를 측정하였다. 기능화된 그래핀은 Hummers법을 이용하여 산화그래핀(GO)을 얻어낸 후 aluminum isopropoxide를 졸-젤 반응을 통해 $Al(OH)_3$를 그래핀 표면에 도입하여 제작하였다(Al-GO). GO와 Al-GO의 기능화 여부 확인을 위하여 XPS, FE-SEM, FE-TEM 분석을 시행하였으며 GO 표면에 $Al(OH)_3$ 층이 생성된 것을 확인하였다. 기능화된 그래핀/에폭시 복합체는 bisphenol A(DGEBA) 계열의 에폭시에 1, 3 wt%의 GO와 Al-GO를 첨가하여 전기저항을 측정하였으며 Al-GO가 GO와 비교하여 전기 절연성질이 우수하였다. 또한 DGEBA와 bisphenol F(DGEBF) 계열의 에폭시에 1 wt%의 GO와 Al-GO를 첨가하여 열전도 특성을 비교하였으며 순수 에폭시 레진과 비교하여 Al-GO/DGEBF는 23.3%, Al-GO/DGEBA는 21.8%의 열전도도 증가를 보였다.

• 한방재활의학과학회지
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• 제30권3호
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• pp.117-127
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• 2020

Objectives The purpose of this study was to compare the effect of herb medication based on 'Go-bang' treatment, 'Huse-bang' treatment for patients with acute neck pain caused by traffic accidents. Methods We studied 40 patients with acute neck pain after traffic accidents who had admitted to Department of Korean Medicine Rehabilitation, College of Korean Medicine, Daejeon University from November 25, 2018 to November 25, 2019. 20 patients had received Herb Medication Based on 'Go-bang' and 20 patients had received herb medication based on 'Huse-bang' three times a day. The study was conducted as a retrospective observation study which analyze the patient's medical records. We used visual analogue scale (VAS) to evaluate pain reduction and neck disability index (NDI) to evaluate function improvement twice (hospitalization day and 5 days later). Statistical analysis was performed using the IBM SPSS statistics 25 program. Result The VAS scores, NDI scores decreased statistically significantly after treatment in all patients. Both 'Go-bang' and 'Huse-bang'groups showed a statistically significant VAS reduction and improvement of NDI on the fifth day of hospitalization. In the 'Huse-bang' group, there was a statistically significant improvement of NDI than in the 'Go-bang' group. Conclusion We found that both types of herbal-medication were significantly effective on acute neck pain and neck disability after traffic accident. Further study is needed about the comparison of effectiveness between Go-bang' and 'Huse-bang'groups.

• 한국통신학회논문지
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• 제31권7C호
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• pp.725-734
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• 2006

이 논문의 1부에 이어, 수신안테나 다양성을 쓰는 직접수열 부호분할 다중접속(direct-sequence code division multiple access: DS/CDMA) 시스템에서 의사잡음(pseudonoise: PN) 부호를 획득할 때 평균값(cell average: CA), 큰값(greatest of: GO), 작은값(smallest of: SO) 일정 오경보 확률(constant false alarm rate: CFAR) 처리기의 성능 특성을 비균질 (nonhomogeneous) 잡음 환경에서 얻고 견주어 본다. 균질 잡음 환경에서와는 다르게, 비균질 잡음 환경에서는 큰값 일정 오경보 확률 처리기가 가장 성능이 좋고, 평균값 일정 오경보 확률 처리기가 그 다음으로 성능이 좋다는 것을 볼 수 있다.

• 대한조선학회논문집
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• 제47권2호
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• pp.196-209
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• 2010

For the analysis of Acoustic Target Strength(TS) that indicates the scattered acoustic intensity from the underwater vehicles, an analysis program that is applicable to scatterers insonified by spherical wave source in near field is developed. In this program, the Physical Optics(PO) method is embedded as a base component. To increase the accuracy of the program, multiple bounce effects based on Geometrical Optics(GO) method are applied. To implement multiple bounce effects, GO method is used together with PO method. In detail, GO method has a concern in the evaluation of the effective area, and PO method is involved in the calculation of Acoustic Target Strength for the final effective area that is evaluated by GO method. For the embodiment of near field spherical wave source originated multiple bounce effects, image source concept is implemented additively to the existing multiple bounce algorithm which assumes plane wave insonification. Various types of models are tested to evaluate the reliability of the developed program and finally, a submarine is analyzed as an arbitrary scatterer.

• 한국수학사학회지
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• 제29권1호
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• pp.1-16
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• 2016

This study analyzes the contents and expression methods of Jeong Yag-yong's "Gugo Wonlyu". The 530-page long "Gugo Wonlyu" discusses 1541 formulas about Gu, Go, Hyun, Hwa, Gyo; however, it has only the results of formulas and no explanations about their inducement method. Therefore we do not know how he derives and verifies the formulas. In addition, it did not follow the basic form of oriental mathematics textbooks: problem-answer-solution, and presented all the formulas only with characters without using numbers. This is a very distinctive aspect compared to other mathematical textbooks. In addition, the formulas about 5-Hwa and 5-Gyo are addressed exactly in fixed order and covers a formula in various directions. This is a clear evidence that Jeong Yag-yong analyzed and studied the Gugosul thoroughly.

• 대한전기학회논문지:시스템및제어부문D
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• 제50권4호
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• pp.161-167
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• 2001

Camera calibration is very important problem in 3D measurement using vision system. In this paper is proposed the simple method for camera calibration. It is designed that uses the principle of vanishing points and the concept of corresponding points extracted from the parallel line pairs. Conventional methods are necessary for 4 reference points in one frame. But we proposed has need for only 2 reference points to estimate vanishing points. It has to calculate camera parameters, focal length, camera attitude and position. Our experiment shows the validity and the usability from the result that absolute error of attitude and position is in $10^{-2}$.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.782-785
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• 2004

In the Well-being age, many people use a city park for rest deeply think and constitutional walk. The city park is located at near side by traffic road in urban. Citizens are not satisfied with it's fuction as a haven of peace due to road traffic noise. Thus, this study is for a research on the actual noise condition of a city park in Nowon go. This study uses a prediction method called ASJ-model in order to calculate PWLs of road traffic noise. Using calculated PWLs, noise levels in a park are predicted and compared with measured values.