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역사주의관점으로 본 실내공간의 복고적 성향 변화에 관한 분석
천정현(Cheon, Jeong-Hyeon),정석연(Jung, Suk-Yon) 한국실내디자인학회 2019 한국실내디자인학회 학술대회논문집 Vol.21 No.1
This study analyzes the change of retroactive tendency of interior space from the viewpoint of historicalism. All our lives are accompanied by historical contexts, and we must consider socio-cultural aspects to understand them. Based on the overall historical context of design, it is assumed that retro design will also exist in the historical flow and that similar forms will occur repeatedly. In connection with the socio - cultural background of our country, we analyze the retroistic tendencies in interior space from 1970 to the present through case studies. As a result of research, the retro trend of interior design was not in the ephemeral trend but in the historical trend, It was found that the anxiety, lack, future instability, and self - expression need arising from the socio - cultural context lead to retro trends. Looking at the retro expression of the interior, the retro of the 80s and 90s and modern retro showed a little difference in ornamentality, sensuality, and mixture, but expressed the desire to return to the past as imitation, reconstruction, reinterpretation, We can see that there is a similarity in the emotional change through these spaces On the other hand, it is expected that the subtle differences according to the subjects who enjoy the social culture can create some differentiation in the design style. This study has significance as a basic data to grasp the change of modern retro design tendency.
역사주의관점으로 본 외식공간의 복고적 경향에 관한 연구 - 1970년대와 2010년대를 중심으로 -
천정현(Cheon, Jeong-Hyeon),정석연(Jung, Suk-Yon) 한국실내디자인학회 2020 한국실내디자인학회논문집 Vol.29 No.2
The purpose of this study is to analyze the eating out space where the trend of retrofit is displayed from the viewpoint of historicalism, it is to provide the basic data of retro design for the dining room in Korea by revealing the basics of the retro trend of interior design. The historical scope of th study is limited to the 1970s and 2010s. The method of study was literature research, categorized interior design elements and retro types. Dining spaces in the 1970s conducted a literature survey and Dining spaces in the 2010s conducted field surveys, such as indoor observation and photography. Afterwards, the results were derived through case analysis of eating spaces by period. The results of the study, it was found that the retro tendency of eating out space presents a common expression by citing past styles, and changes in retro expressions are made in accordance with social and cultural trends and demands. First, the retro trend of eating out spaces is a phenomenon that appears repeatedly in relation to social and cultural phenomena. Second, in the dining room, the retro expression of the interior design elements tended to quote Western classical style and Korean elements. Third, in quoting the past styles, the retro-type of eating space tends to change the shape and material of the structure, the shape of the original furniture elements, or to change the shape of the original form and to convert of the existing functions. In the 1970s, the retro trend of dining out space was somewhat indiscriminate in the past, focusing on the structure, and limited in the formative reproduction. On the other hand, the retro trend of the 2010s has empirical characteristics compared to the 1970s, and the expression of interior design improves the quality of interior design through variation rather than simple imitation and reproduction. It is also moving in a positive direction to strengthen awareness of time and history through the continuous structure and materials.
항공 통신 기술 : L-대역 디지털 항공 통신 시스템의 수신 성능 분석
천정현 ( Jeong Hyeon Cheon ),윤경한 ( Kyung Han Yoon ),장수현 ( Soo Hyun Jang ),정윤호 ( Yun Ho Jung ) 한국항행학회 2015 韓國航行學會論文誌 Vol.19 No.2
최근 항공 통신의 데이터 트래픽 증가로 인하여, 대륙 간 항공통신을 위한 L-band 대역 디지털 통신시스템인 LDACS가 제안되었다. LDACS 모델은 LDACS type-1과 LDACS type-2의 두 가지 규격으로 정의 되었으며, 향후 면밀한 검토를 바탕으로 한 가지 시스템을 선정하여 운용하기로 하였다. 이에 본 논문에서는 두 LDACS 시스템의 규격 분석과 함께 채널 환경에 따른 수신 성능을 비교 및 평가함으로써 항공 통신 시스템에의 적용 가능성을 분석하였다. 분석결과, 두 시스템 모두 airport 채널 환경에서 큰 성능 열화를 보였으나 LOS 환경의 en-route 채널의 경우에 우수한 성능을 보임을 확인할 수 있었다. 또한, en-route 환경에서 LDACS type-1과 LDACS type-2의 비교 분석 결과, LDACS type-2 대비 LDACS type-1의 수신 성능이 BER 기준 1 dB 우수함을 확인 할 수 있었으며, 이는 보다 강력한 채널 부호가 적용되었기 때문으로 판단된다. Due to the increase in the data traffic for the aeronautical communications, LDACS has been proposed to support the data link in the continental domain. LDACS is defined in two standards of LDACS type-1 and LDACS type-2, which are going to be selected through the intensive comparison. In this paper, we analyzed two types of standards and evaluated their performance for various channel models. Simulation results show that both LDACS type-1 and LDACS type-2 have a good performance in the en-route channel model, while they have a poor performance in the airport channel model. In the comparison results for LDACS type-1 and LDACS type-2, LDACS type-1 shows the better performance of 1dB than LDACS type-2 owing to the stronger channel coding technique.
김헌영(H.Y.Kim),강기봉(K.B.Kang),신윤재(Y.J.Shin),천정현(H.Cheon) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_2
The deployment process of fully folded airbag is analyzed by using commercial finite element program, PAM-SAFE. Folding methods are presented for flat driver side airbag and 3-dimensional passenger side airbag. 'Initial metric' is used to fold 3-dimensionaJ passenger side airbag before deployment analysis. The pressure waveform obtained from simulation are compared to the test results adopting 125mm-30ms criteria. The results of simulation can be applied to the design of airbag module.<br/>