• Journal of Information Processing Systems
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• 제15권2호
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• pp.399-409
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• 2019

Three-dimensional (3D) human pose reconstruction from single-view image is a difficult and challenging topic. Existing approaches mostly process frame-by-frame independently while inter-frames are highly correlated in a sequence. In contrast, we introduce a novel spatial-temporal 3D human pose reconstruction framework that leverages both intra and inter-frame relationships in consecutive 2D pose sequences. Orthogonal matching pursuit (OMP) algorithm, pre-trained pose-angle limits and temporal models have been implemented. Several quantitative comparisons between our proposed framework and recent works have been studied on CMU motion capture dataset and Vietnamese traditional dance sequences. Our framework outperforms others by 10% lower of Euclidean reconstruction error and more robust against Gaussian noise. Additionally, it is also important to mention that our reconstructed 3D pose sequences are more natural and smoother than others.

• 한국의류학회지
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• 제33권7호
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• pp.1128-1139
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• 2009

This study is on the works of Hussein Chalayan that is an expression of his idea and abstract concepts such as culture, history, time, space, nature, and humanity. The perspective of E. H. Gombrich is studied to understand the works of Chalayan who is the one of representative fashion designers in the present age. The 'schema and correction' process of E. H. Gombrich provides a suitable interpretation frame that considers the variety of works of art and the deconstruction of genre in the after 20th century. Hussein Chalayan attempts to combine clothes with other territories to show the spirit as materiality. He expresses the clothes that speaks the form of nature, symbolizes the combination of culture, visualizes time and space, and investigates the existence of human beings. Hussein Chalayan poses an endless question about the existence of human beings. He has put a question about the relationship of the human being and time, space, history, and nature. His trial to visualize the metaphysical conception of 'ego' and 'self' through his works makes him the representative designer of the 21st century.

• 한국멀티미디어학회논문지
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• 제8권1호
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• pp.9-18
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• 2005

본 논문에서는 MPEG-4부호화기에서 인트라 프레임의 양자화 레벨을 구하는 방법을 제안한다. 인트라 프레임은 GOP 내에서 참조 프레임으로써 다른 프레임에 계속 전파되므로 이 프레임의 성능에 의해 전체 GOP의 성능이 크게 영향을 받을 만큼 중요한 부분이다. 본 논문에서는 인트라 프레임 의 양자화 레벨을 효과적으로 구할 수 있도록 할당된 비트 수와 입력되는 영상의 복잡도, 그리고 GOP의 구조를 이용하는 방법을 제안한다 실험 결과에서는 기존의 방법들이 고정된 값을 사용하여 효율이 저하되거나 영상의 특성에 따라 상이한 성능을 보이는데 비하여 본 논문의 방법은 다양한 영상에 대하여 안정된 결과를 보였다. 제안한 방법을 MPEG-4검증모델에서 선택한 Q2 알고리듬과 비교할 때 영상의 특성에 따라 조금씩의 차이는 있지만 높은 비트 율에서 최대 3.49dB 정도의 높은 이득을 얻을 수 있었다.

• 복식
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• 제59권2호
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• pp.42-58
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• 2009

This study researches previous aesthetic categories and organizes new one which is applied to fashion design. With the frame of the new aesthetic category, a survey about aesthetic consciousness and aesthetic enjoyment are conducted. Also, this study discusses about the variety of the aesthetic consciousness and aesthetic enjoyment which are arisen from peculiarity of fashion and the necessity of the systemized criticizing theory. Through the survey of aesthetic consciousness about fashion designer's clothes, there are possibilities of varieties in visions and critics about fashion works. But it is necessary to read in right way about kunstwollen and symbolic meaning of designer. In order to read aesthetic consciousness inside of a fashion designer's works properly, the interpretation method which follows in systematized phases such as iconology and semiology is necessary. Contemplation for the 'clothes' which is a part of an art Is not just simply see the object and judge subjectively but examine the factors which have influenced to the formation, kunstwollen, and symbolic meaning. Also, the process and the attitude which enjoy the aesthetic value have to be analyzed and criticized which based on systemized interpretation frame. The 'Clothes' is one artistic object which expresses kunstwollen of fashion designer and he or she puts in a sentiment and an ideology into the clothes and which reflects the present society and effects to the descendant.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제52권8호
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• pp.405-412
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• 2003

This paper presents a three-phase Line-Interactive uninterruptible power supply (UPS) system with series-parallel active power-line conditioning capabilities, using synchronous reference frame (SRF) based controller, which allows an effective power factor correction, source harmonic voltage compensation, load harmonic current suppression, and output voltage regulation. The three-phase UPS system consists of two active power compensator topologies. One is a series active compensator, which works as a voltage source in phase with the source voltage to have the sinusoidal source current and high power factor under the deviation and distortion of the source voltage. The other is a parallel active compensator which works as a conventional sinusoidal voltage source in phase with the source voltage, providing to the load a regulated and sinusoidal voltage with low THD (total harmonic distortion). The control algorithm using SRF method and the active power flow through the Line-interactive UPS systems are described and studied. The simulation and experimental results are depicted in this paper to show the effect of the proposed algorithm.

• 만화애니메이션 연구
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• 통권45호
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• pp.75-99
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• 2016

애니메이션은 다른 매체와는 구별되는 독특한 미학적 특성들을 지니고 있다. 우선적으로 애니메이션은 분절 촬영으로 손에 의해 만들어진 창조적 이미지이다. 또한 '변형'을 통해 생성된 애니메이션 이미지는 특유의 '운동성'으로 새로운 시공간을 얻는다. 본 논문에서는 애니메이션의 시공간의 표현성을 크게 두 가지로 나누어 다룬다. 첫째는 변형 이미지와 둘째는 운동성에서 이루어지는 이미지이다. 이를 구체화하기 위해서 본 논문은 조르주 슈비츠게벨의 작품을 분석하였다. 슈비츠게벨의 작품들은 애니메이션의 이러한 구조적 특성을 잘 반영하였다. 특히, 슈비츠게벨의 , < La course ${\grave{a}}$ $l^{\prime}ab{\hat{i}}me$ >은 다양한 변형과 운동성이 그의 표현방법과 함께 잘 결합했다는 점에서 애니메이션 시공간 분석의 좋은 사례가 되는 작품들이다. 이들 작품의 이미지들은 위의 주된 표현장치들을 통해 끊임없는 변형적 흐름을 지속한다. 본 연구는 이 작품들 속에서 변형과 운동성이 어떤 기능을 하면서 의미를 만드는가를 분석하는데 초점을 맞춘다. 이들 작품들은 변형과 다양한 움직임으로 이루어져, 관객에게 다양한 영화적 형식을 지각하도록 만든다. 여기서 우리는 공간과 시간, 정지와 운동, 2차원과 3차원, 해체와 재구성, 추상과 구상 등 무수한 이중적 구조를 체험하게 되는데, 그 주된 장치는 변형과 애니메이션의 운동성을 강화한데서 기인한다고 할 수 있다.

• 한국철도학회논문집
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• 제8권5호
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• pp.425-433
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• 2005

For the design of welded bogie frame, the concept of multidisciplinary engineering activities, i.e. static, fatigue and dynamic analysis, has been applied, in which the sharing of design parameters related with each analysis and the collaboration of the working parts in charge should be fulfilled. However, in spite of these necessities, the multi-disciplinary engineering activities couldn't be performed in practice due to tack of the automation of the required analysis. In this paper, an automation of fatigue durability analysis of welded bogie frame according to UIC-Code was proposed by using the Model Center, which enables to integrate the several tools for the fatigue durability analysis, i.e. I-DEAS, ANSYS and BFAP, and to perform iterative analysis works in relation to the geometrical change of transom support bracket. Besides, the wrapping programs to control I/O-data and interfaces of these tools were developed. The developed automation technique brings not only significant decreasing man-hour required in the durability analysis, but also providing a platform of the multidisciplinary engineering activities.

• 정보저장시스템학회논문집
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• 제1권2호
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• pp.161-168
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• 2005

This paper optimizes the optical flying head(OFH) suspension using the integrated optimization frame, which automatically integrates the analysis with the optimization and effectively implements the repetitive works between them. The problem formulation for the optimization is suggested to improve the dynamic compliance of OFH and to shift the resonant frequencies caused tracking errors to high frequency domain. Furthermore, the minimization of the effective suspension mass that leads to decrease the so-called 'lift-off' as the disk-head separation acceleration divided by the suspension load is taken into consideration. In particular, this study is carried out the optimal design considering the process of modes tracking through the entire optimization processes. The advanced suspension that reduces the effective mass of the suspension and increases the resonant frequencies of sway and $2^{nd}$ torsion over 10kHz is achieved by using the integrated optimization frame.

• 천문학회보
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• 제36권2호
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• pp.132.2-132.2
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• 2011

We are developing Adaptive Optics (AO) system for astronomical use. The He-Ne laser works as an artificial light source. The tip-tilt correction servo is added to our AO system. The tip-tilt term, among the Zernike terms, is the biggest contributor of wavefront deformation caused by atmospheric turbulence at small telescopes. The tip-tilt correction servo consists of a Piezo tip-tilt platform with a mirror, a quadrant photodiode as a tip-tilt sensor, and controllers. The Shack-Hartmann wavefront sensor measures the residual wavefront errors and they are corrected by the MEMS (Micro Electro Mechanical System) deformable mirror. The MEMS deformable mirror allows the compact size at low cost compare to adaptive secondary mirror and other deformable mirrors. As the frame rates of the MEMS deformable mirror is about tens of kHz, the frame rates of the detector in wavefront sensor is the bottleneck of the wavefront correction speed. For faster performance, we replaced a CCD which provides frame rates only 70 Hz with a CMOS with frame rates up to 450 Hz.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.30-37
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• 2020

In the building construction, the steel-frame work occupies an important position in terms of structure, cost and quality. Especially in Japan, steel frames have traditionally been the main structure of many buildings. For steel-frame works in such positions, this paper investigates an existing steel fabricator to clarify the actual conditions of design decision making process and management method in steel production process. This study focuses on a steel fabricator (Company M in the following sentences), whose main market is Japan and which has facilities in Thailand, China, and Japan. Company M uses QR codes to control the production status of products, and exchanges all information between inside and outside the company via specialized departments in the form of documents. The authors have already analyzed the relationship between production lead time and defect rate based on actual project data at Architectural Institute of Japan in 2016. In 2019, we expressed the process from the confirmation of the design information of the current steel frame to the production by WBS, and clarified the relationship between the production lead time and steel frame product quality structurally. In this paper, the authors reoport the progress of the survey conducted so far, the positioning of the collected data, and the future survey policy.