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홍주표 한국사진학회 2000 AURA Vol.7 No.1
The main objective of this study is to analyse how the tendency of postmodernism in contemporary fashion photography is expressed, and it faces and searchs for the direction the 21 th century's fashion photography should take. After thorough examination and analysis, there have been revealed such a notable characteristic as follows. 1. The expression of using for photo's mechanism. 2. The expression of using for Surrealism. 3. The expression of separating from product. 4. The expression of using for the disharmony of fashion and materials, backgrounds. Understanding the consumer's consciousness and sensibility, it should be able to need the direction of the true meaning in contemporary fashion photography. The postmodernism plays an important role in expanding fashion photography's expression of the 20th century as it makes fashion photography a creative idea, and in new millennium, the postmodernism will go far toward presenting the new tendency of fashion photography, and the postmodernism images will satisfy the public demand for novelty and were effective sales tools.
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에디토리얼(editorial) 패션사진의 구성요소와 표현형식에 관한 연구
홍주표 현대사진영상학회 2002 현대사진영상학회논문집 Vol.5 No.-
A Study on Constituent Unit and Expression of Editorial Fashion Photography Most of the editorial fashion photography consists of the fashion shots that accompany the articles(theme, concept, credit line) of text and photographies in fashion magazines. This kind of work forms an international sounding board for the talents of fashion photographers. Advertising art directors use magazines as a source book from which to select new photographers. The fees for editorial work are not as high as those for advertising. But fashion photographers are credited for their work - their names appear alongside their photographs - and they are less restricted artistically. The present study was conducted to analyze constituent unit and expression of editorial fashion photography in women's fashion magazine. The results of this study were as follow : 1. The editorial page's constituent units were composed of theme, concept, credit line, photography. Besides, emotional appeal types were usually used in life-style, eroticism expression. 2. The editorial page's expressions of life-style and eroticism were used more often for product expression because of consumer preference.
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쌍 체임버 기반 장비의 로드락 구성에 따른 생산성 분석
홍주표,이기석,Hong, Joo-Pyo,Lee, Ki-Seok 한국반도체디스플레이기술학회 2008 반도체디스플레이기술학회지 Vol.7 No.2
Productivity is one of the performance indices of the semiconductor equipment in manufacturing viewpoint. Among many ways tried and adopted for improvement of the productivity of the FAB equipment, variation of equipment configuration was considered and its effect on the throughput was analyzed. Parallel machine cycle charts that were generated based on the equipment log were used in the analysis. Efficiency of the equipment due to change of the structure and the probability of the usage in the manufacturing process were examined. The results showed that the modification of the control algorithm in the equipment and the redistribution of the process time for each process and transfer module along to the change in the structure enhance the throughput of the equipment.
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커터수명지수 예측을 위한 다중선형회귀분석과 트리 기반 머신러닝 기법 적용
홍주표,고태영 한국암반공학회 2023 터널과지하공간 Vol.33 No.6
TBM 공법은 굴착면 안정성 확보 및 주변환경에 비치는 영향을 최소화하기 때문에 도심지나 하・해저터널 등에서 적용 사례가 증가하는 추세이다. 디스크 커터의 수명을 예측하는 대표적인 모델 중 NTNU모델은 커터수명지수(Cutter Life Index, CLI)를 주요 매개 변수로 활용하지만 복잡한 시험절차와 시험장비의 희귀성으로 측정에 어려움이 있다. 본 연구에서는 다중선형회귀분석과 트리 기반의 머신러닝 기법으로 암석물성을 활용하여 CLI를 예측하였다. 문헌 조사를 통해 암석의 일축압축강도, 압열인장강도, 등가석영함량과 세르샤 마모지수 등을 포함한 데이터베이스를 구축하였고 파생변수를 계산하여 추가하였다. 다중선형회귀분석은 통계적 유의성과 다중공선성을 고려하여 입력 변수를 선정하였고 머신러닝 예측 모델은 변수 중요도를 기반으로 입력 변수를 선정하였다. 학습용과 검증용 데이터를 8:2로 나누어 모델 간 예측 성능을 비교한 결과 XGBoost가 최적의 모델로 선정되었다. 본 연구에서 도출된 다중선형회귀모델과 XGBoost모델을 선행 연구와 예측 성능을 비교하여 타당성을 확인하였다. TBM (Tunnel Boring Machine) method is gaining popularity in urban and underwater tunneling projects due to its ability to ensure excavation face stability and minimize environmental impact. Among the prominent models for predicting disc cutter life, the NTNU model uses the Cutter Life Index(CLI) as a key parameter, but the complexity of testing procedures and rarity of equipment make measurement challenging. In this study, CLI was predicted using multiple linear regression analysis and tree-based machine learning techniques, utilizing rock pro- perties. Through literature review, a database including rock uniaxial compressive strength, Brazilian tensile strength, equivalent quartz content, and Cerchar abrasivity index was built, and derived variables were added. The multiple linear regression analysis selected input variables based on statistical significance and multicollinearity, while the machine learning prediction model chose variables based on their importance. Dividing the data into 80% for training and 20% for testing, a comparative analysis of the predictive performance was conducted, and XGBoost was identified as the optimal model. The validity of the multiple linear regression and XGBoost models derived in this study was confirmed by comparing their predictive performance with prior research.
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Rotational plating process design with computational fluid analysis
홍주표,이기석,정믿음,송경섭 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.12
During the semiconductor manufacturing process and equipment development, we designed a face-up type electro-plating process and equipment including technologies of single wafer processing, wafer handling, and cyclic fluid delivery. In this study, with the help of computational fluid dynamics, we presented the flow effect on the wafer from the viewpoint of the coating uniformity. Process and hardware parameters, such as the electrode rotating speed, the gap between the electrode and the wafer, and the electrode shape were considered. The electrode height of 10 mm exhibited the best results, and this may be caused by the shoulder gap location to the outlet duct. A rotating speed of 5 rpm was shown to produce better results than those at other speeds. The butterfly wing and the meshed disk electrode showed a similar tendency in terms of the rotating speed and the gap. However, the butterfly-wing-type might show less uniform results than those of the meshed disk due to its original non-uniformity in the circumferential direction in case of lower rotating speed.
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