http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
가상 미술관에서의 길 안내 ‘흐르는 선’ 제안: FoMO와 몰입을 중심으로
최대식(Daeshik Choi),박재완(Jaewan Park) 한국디자인학회 2024 디자인학연구 Vol.37 No.1
Background : In traditional art museums, designers use various visual guidance strategies to direct visitors, optimizing their experiences in alignment with the artist’s vision and exhibition’s design. These strategies include exhibit placement, graphic design, and lighting. However, as virtual exhibitions grow in popularity, there’s a notable lack of studies on visual guidance within virtual museums. Methods : In our study, 31 participants(17 males and 14 females) engaged with a virtual art museum through a display monitor, responding to various visual guidance stimuli, including fixed lines, fixed arrows, pointing arrows, and flying butterflies. These stimuli fell into two categories: World-referenced stimuli, which were centered on the user’s environment, and Screen-referenced stimuli, designed around the user’s display screen. Upon exploring the virtual museum, participants then completed a questionnaire probing their experiences of fear of missing out(FoMO), their reactions to the visual guidance(Visual Guidance Questionnaire, or VGQ), and their sense of flow or engagement with the exhibit. To analyze the gathered data, we employed the RM MANOVA, allowing us to empirically evaluate these constructs. Results : In a comparative analysis of comparative analysis of methods to visual guidance in a virtual art museum, we found that: 1)The distinction between world-referenced methods of visual guidance, centered on the user’s perspective, and screen-referenced methods did not show a significant correlation with VGQ, FoMO, or Flow. 2)A comparison of the four methods of visual guidance showed significant differences in VGQ, FoMO, and Flow. For FoMO, participants felt less guided by a ‘fixed line’ compared to a ‘pointing arrow’ and ‘butterfly’(F= 8.31). For Flow, the score was higher when using the ‘fixed line’ than the ‘pointing arrow’ and ‘butterfly’(F= 5.38). Lastly, the VGQ results showed that using the ‘fixed line’ received significantly higher scores compared to the ‘pointing arrow’ and ‘butterfly’, and the ‘fixed arrow’ also received a significantly high score(F= 18.8). These results indicated that the way visual guidance in a virtual art museum affects the user’s experience in the museum, preventing them from becoming lost and allowing them to immerse themselves in the artwork. Moreover, the ‘fixed line’ method of guiding attention was found to be the most positive for experiencing the virtual art museum. Conclusions : Based on the experimental results, our study proposes a new ‘flowing line’ visual guidance method for path guidance in virtual art museums. The ‘flowing line’ offers intuitive understanding of navigation without requiring users to interpret graphics or text, unlike traditional signage or maps used in virtual art galleries. It also represents the sequence of the exhibition through the flow of gradients, enabling sequential navigation and compensating for the shortcomings of the ‘fixed line on the floor’. Furthermore, The ‘flowing line’ is less forceful than the arrows traditionally used in visual guidance, and seamlessly integrates into the art museum without disrupting the appreciation of artwork. These findings provide foundational data that can be utilized in future virtual art museum planning, suggesting ways to enhance user’s art experiences by implementing efficient path guidance through visual guidance.
최대식(Dae-Sik Choi),김인혁(In-Hyuk Kim),손영익(Young-Ik Son) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.11
DC 모터의 전류 제어는 회전에 의해 발생하는 역기전력을 외란으로 취급하여 역기전력을 보상하는 방법이 많이 사용된다. 본 논문에서는 속도 센서를 사용할 수 없는 모터 응용 분야에서 상태 관측기를 사용하여 전류 제어기를 구성하는 문제를 다룬다. 제안된 관측기는 간단한 1차 모델에 대한 PI 관측기로 설계되며 역기전력을 추정하는 형태로 구성된다. 실험을 통해 제안한 관측기가 1차 모델만을 고려하여 설계되었음에도 DC 모터의 불확실성에 강인한 성능을 보임을 확인한다.
Random forest 를 이용한 RNA 에서의 단백질 결합 영역 예측
최대식 ( Daesik Choi ),박병규 ( Byungkyu Park ),채한주 ( Hanju Chae ),이욱 ( Wook Lee ),항경숙 ( Kyungsook Han ) 한국정보처리학회 2016 한국정보처리학회 학술대회논문집 Vol.23 No.2
단백질과 RNA 의 상호작용 데이터가 대량으로 늘어남에 따라, 단백질과 RNA 의 결합부위를 예측하는 계산학적인 방법들이 많이 개발되고 있다. 하지만, 많은 계산학적인 방법들은 단백질에서 단백질과 RNA 결합부위를 예측한다는 한계점이 있었다. 본 논문에서는 RNA 와 단백질의 서열정보를 모두 사용하여, 단백질과 결합하는 RNA 결합부위를 예측하는 기법과 그 결과를 논한다. WEKA random forest(http://www.cs.waikato.ac.nz/ml/weka/)를 이용하여 예죽 모델을 개발하였고, RNA 서열의 서열 프로파일, 서열 composition, 결합 상대방의 단백질의 특성 등을 특징으로 표현하였다. Random forest 기법을 사용한 cross validation 의 결과로서 1:1 모델에서 제일 높은 성능인 92.4% sensitivity, 92.0% specificity, 92.2% accuracy 를 보였고, independent test 에서는 72.5% sensitivity, 90.0% specificity, 92.1% accuracy 를 보였다.
최대식(Daesik Choi),김석우(Seokwoo Kim),염태영(Taeyoung Yeom),이승배(Seungbae Lee) 유공압건설기계학회 2021 드라이브·컨트롤 Vol.18 No.1
This paper presents research on methods for the reduction of forklifts’ noise level for the increased comfort and safety of its operator. A cooling fan with a high air volume flow rate installed in the forklift acts as an important design parameter which efficiently cools the heat exchanger system, helping to transfer internal heat from the engine room to the outdoors with both transmitted and diffracted opening noises. The cooling fan contributes significantly to both the forklift’s emitted sound power and the operator room’s noise level, thereby necessitating research on the forklift"s reduction of acoustic power level and transmission. A noise analysis for various fan models with a biomimetic design based on eagle-wing geometry was conducted. In addition to the acoustic power generation, the aerodynamic performance of the cooling blade is also strongly influenced by the design of airfoil distribution, thereby requiring optimization. The cooling fans were fabricated and installed in the forklift in order to check the efficacy of the forklift engine’s cooling, and the final version of the fan was measured for its ability to lower acoustic power level and cool the engine room. This study explains the aerodynamic and acoustic features of the designed fans with the use of BEM analysis and forklift test results.
최대식(Choi Dae Sik),성장환(Seong Jang Hwan) 한국도시행정학회 2010 도시 행정 학보 Vol.23 No.1
This study aims to forecast the future demand for residential land in each municipality and the whole country. To this end, this study develops two separate models: a per capita living space estimation model and a population projection model. For the former, the whole country is classified into seven municipality groups and a model is established for each group. According to the results, county residents in the non-capital region are expected to have the largest per capita living space of 32.93m' in 2020, while city residents in the capital region to have the smallest of 25. 39m'. The future population of each municipality is projected with the use of Cohort survival method and regression method. In terms of the population increase rate, Yongin ranks the highest, followed by Gwangju(Gyeonggi), Paju, Hwaseong and Ansan. All of them are located in the capital region. Based on these results, the future demand for additional housing space and residential land is derived. By 2020, an additional housing space of 50lkIn', or 5.9 million housing units, are expected to be needed, with the demand for new residential development area reaching 767km', By city, Bucheon is found to have the highest ratio of the demand for new residential area in comparison with 'urban area' designated by the National Land Planning Law, followed by Anyang, Suweon, Seoul and Seongnam. By municipality group, Seoul/Incheon ranks the highest with the annual rate of 0.79 percent, followed by cities in the capital region, and metropolises in the non-capital region. Counties in the non-capital region are forecasted to have the annual rate of 0.06 percent, far lower than other groups.
최대식(D. S. Choi),김석우(S. W. Kim),김재덕(J. D. Kim),유한성(H. S. Yoo),이승배(S. B. Lee) 유공압건설기계학회 2020 유공압건설기계학회 학술대회논문집 Vol.2020 No.12
This study is an example of each improvement activity of driver noise and sound power for a 4 ton class forklift.. To reduce the noise power of the forklift, it is necessary to reduce the noise of the cooling fan. Noise analysis was carried out by applying the optimal design of the cooling fan to simulate nature and applying the eagle wing airfoil. An analysis of noise reduction was conducted through the experimental results mounted on an actual forklift. In order to reduce driver noise, a sound absorbing and insulating material was attached inside the cabin to reduce engine radiation noise. Acoustic BEM analysis and acoustic camera equipment were used to understand the effects on sound absorbing and insulating materials.