• 제어로봇시스템학회논문지
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• 제8권3호
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• pp.275-280
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• 2002

A new algorithm for gradual scene change detection in MPEG based frame sequences is proposed in this paper. The proposed algorithm is based on the fact that most of gradual curves can be characterized by variance distributions of edge information in the frame sequences. Average edge frame sequences are obtained by performing "sober" edge detection. Features are extracted by comparing variances with those of local blocks in the average edge frames. Those features are further processed by the opening operation to obtain smoothing variance curves. The lowest variance in the local frame sequences is chosen as a gradual detection point. Experimental results show that the proposed method provides 85% precision and 86% recall rate fur gradual scene changes.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XIII)
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• pp.815-820
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• 2003

A huge database resulted from whole genome sequencing has provided a possibility of new information that is likely to extent the scope and thus changes the way of approach for the functional assigning of putative open reading frames annotated by whole genome sequence analyses. These are mainly realized by ease, one-step identification of putative genes using genomics or proteomics tools. A major challenge remained in biotechnology may translate these informations into better ways to screen or select a gene as a representative sequence. Further attempts to mine the related whole genes or partial DNA fragment from whole genome treasure, and then the incorporation of these sequences into a representative template, will result in the use of putative genes that can be translated into functional proteins or allowed the generation of new lineages as a valuable pool. Such screens enable rapid biochemical analysis and easy isolation of the target activity, thereby accelerating the screening of novel enzymes from the expanded library with related sequences. Information-based PCR amplification of whole genes and reconstitution of functional DNA fragments will provide a platform for expanding the functional spaces of potential enzymes, especially when used mixed- or metagenome as gene resources.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4438-4460
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• 2017

The Kernelized Correlation Filters (KCF) tracker has caused the extensive concern in recent years because of the high efficiency. Numerous improvements have been made successively. However, due to the abrupt motion between the consecutive image frames, these methods cannot track object well. To cope with the problem, we propose an extended KCF tracker based on swarm intelligence method. Unlike existing KCF-based trackers, we firstly introduce a swarm-based sampling method to KCF tracker and design a unified framework to track smooth or abrupt motion simultaneously. Secondly, we propose a global motion estimation method, where the exploration factor is constructed to search the whole state space so as to adapt abrupt motion. Finally, we give an adaptive threshold in light of confidence map, which ensures the accuracy of the motion estimation strategy. Extensive experimental results in both quantitative and qualitative measures demonstrate the effectiveness of our proposed method in tracking abrupt motion.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1249-1249
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• 2022

The facade, an exterior material of a building, is one of the crucial factors that determine its morphological identity and its functional levels, such as energy performance, earthquake and fire resistance. However, regardless of the type of exterior materials, huge property and human casualties are continuing due to frequent exterior materials dropout accidents. The quality of the building envelope depends on the detailed design and is closely related to the back frames that support the exterior material. Detailed design means the creation of a shop drawing, which is the stage of developing the basic design to a level where construction is possible by specifying the exact necessary details. However, due to chronic problems in the construction industry, such as reducing working hours and the lack of design personnel, detailed design is not being appropriately implemented. Considering these characteristics, it is necessary to develop the detailed design process of exterior materials and works based on the domain-expert knowledge of the construction industry using artificial intelligence (AI). Therefore, this study aims to establish a detailed design automation algorithm for AI-based condition-responsive exterior wall panels and their back frames. The scope of the study is limited to "detailed design" performed based on the working drawings during the exterior work process and "stone panels" among exterior materials. First, working-level data on stone works is collected to analyze the existing detailed design process. After that, design parameters are derived by analyzing factors that affect the design of the building's exterior wall and back frames, such as structure, floor height, wind load, lift limit, and transportation elements. The relational expression between the derived parameters is derived, and it is algorithmized to implement a rule-based AI design. These algorithms can be applied to detailed designs based on 3D BIM to automatically calculate quantity and unit price. The next goal is to derive the iterative elements that occur in the process and implement a robotic process automation (RPA)-based system to link the entire "Detailed design-Quality calculation-Order process." This study is significant because it expands the design automation research, which has been rather limited to basic and implemented design, to the detailed design area at the beginning of the construction execution and increases the productivity by using AI. In addition, it can help fundamentally improve the working environment of the construction industry through the development of direct and applicable technologies to practice.

• 한국언론정보학보
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• 제27권
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• pp.63-91
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• 2004

이 연구는 한국 언론의 젠더담론을 살펴보기 위해 ${\ll}$조선일보${\gg}$ ${\ll}$한겨레신문${\gg}$을 사회면에 실린 여성관련 범죄뉴스의 프레임을 분석하였다. 스트레이트 기사형식을 선호하는 사회면의 범죄기사는 대부분 일화 중심적 뉴스 프레임을 취하고 있었다. 일화 중심 프레임의 기사들이 피해 여성의 이미지를 형성하는 프레이밍 기제들은 가해자 중심의 서술 및 여성 피해자의 타자화, 남성필자의 가부장적인 시선, 선정적 묘사, 여성의 신체적 취약성과 수동성 강조, 피해자 여성 비난하기 등이었다. 주제 중심적 프레임 기사의 특성은 선정성 부각과 함께 사회구조 탓하기와 구체적 대안의 부재로 분석되었다. 후속보도가 이어진 하양피살사건에 대한 사례분석의 결과에 의하면, 사건의 내용이 바뀌었음에도 불구하고 사건발생 초기에 설정된 흥미위주의 여성에 대한 선정적 프레임은 지속되었으며, 이는 한국언론의 내재된 여성관을 확인시켜주는 대표적 사례였다. 이러한 결과는 선정성을 강조하는 언론의 상업주의적인 태도와 경직된 취재보도체제에 비롯되며, 특히 남성편향적인 프레임들은 경찰발표를 그대로 받아쓰는 관행적인 뉴스제작 관습과, 남성기자와 남성적인 뉴스조직의 가치판단에 의해서 형성된다. 두 신문은 정치적 노선의 차이에도 불구하고 여성을 다루는 방식에서 여성문제에 대한 무관심을 드러내는 동시에 가부장적인 여성관을 보여준다. 이는 우리사회의 보수세력과 진보세력의 담론 모두가 남성적 담론으로서 여성은 담론상의 위치에서 사회적 약자로서 소외되고 있음을 반증한다.

• Steel and Composite Structures
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• 제29권1호
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• pp.1-22
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• 2018

Multi-storey precast concrete skeletal structures are assembled from individual prefabricated components which are erected on-site using various types of connections. In the current design of these structures, beam-to-column connections are assumed to be pin jointed. Welded plate beam to-column connections have been used in the precast concrete industry for many years. They have many advantages over other jointing methods in component production, quality control, transportation and assembly. However, there is at present limited information concerning their detailed structural behaviour under bending and shear loadings. The experimental work has involved the determination of moment-rotation relationships for semi-rigid precast concrete connections in full scale connection tests. The study reported in this paper was undertaken to clarify the behaviour of such connections under symmetrical vertical loadings. A series of full-scale tests was performed on sample column for which the column geometry and weld arrangements conformed with successful commercial practice. Proprietary hollow core slabs were tied to the beams by tensile reinforcing bars, which also provide the in-plane continuity across the connections. The strength of the connections in the double sided tests was at least 0.84 times the predicted moment of resistance of the composite beam and slab. The secant stiffness of the connections ranged from 0.7 to 3.9 times the flexural stiffness of the attached beam. When the connections were tested without the floor slabs and tie steel, the reduced strength and stiffness were approximately a third and half respectively. This remarkable contribution of the floor strength and stiffness to the flexural capacity of the joint is currently neglected in the design process for precast concrete frames. In general, the double sided connections were found to be more suited to a semi-rigid design approach than the single sided ones. The behaviour of double sided welded plate connection test results are presented in this paper. The behaviour of single sided welded plate connection test results is the subject of another paper.

• 방송공학회논문지
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• 제11권4호
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• pp.533-540
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• 2006

본 연구에서는 2개의 CMOS 영상 센서가 탑재된 스테레오 시각 모듈을 사용하여 얼굴 움직임 및 표정을 효과적으로 추적할 수 있는 얼굴용 모션 캡쳐 기술을 제안한다. 제안한 추적 알고리즘에는 신경회로망 기반의 중심점추적기법 및 상관추적기법을 사용한다. 실험 결과, 일반 얼굴 표정에 대해 스테레오 시각 모션 캡쳐를 사용한 두 추적기법 모두 15, 30프레임율에 대해 각각 95.6%, 99.6%의 추적성공률을 가진다는 것을 보여준다. 그러나 '입술 떨림'의 경우, 입술부위는 중심점추적기법(82.7%/15frame, 99.1%/30frame)의 추적성공률이 상관추적기법(78.7%/15frame, 92.7%/30frame)보다 높다는 것을 보여준다.

• Wind and Structures
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• 제5권1호
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• pp.49-60
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• 2002

This paper describes a simple method for evaluating the design wind loads for the structural frames of circular flat roofs with long spans. The dynamic response of several roof models were numerically analyzed in the time domain as well as in the frequency domain by using wind pressure data obtained from a wind tunnel experiment. The instantaneous displacement and bending moment of the roof were computed, and the maximum load effects were evaluated. The results indicate that the wind-induced oscillation of the roof is generally dominated by the first mode and the gust effect factor approach can be applied to the evaluation of the maximum load effects. That is, the design wind load can be represented by the time-averaged wind pressure multiplied by the gust effect factor for the first mode. Based on the experimental results for the first modal force, an empirical formula for the gust effect factor is provided as a function of the geometric and structural parameters of the roof and the turbulence intensity of the approach flow. The equivalent design pressure coefficients, which reproduce the maximum load effects, are also discussed. A simplified model of the pressure coefficient distribution is presented.

• 한국기계가공학회지
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• 제18권1호
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• pp.46-51
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• 2019

As the industry develops and quality of life increases, the concept of leisure is also changing. Bicycling is a healthy sport for exercising while enjoying nature, facilitating the enjoyment of a healthy life. As a result, the awareness surrounding bicycles has increased, and so has the interest in lighter and more luxurious carbon bikes. The number of domestic companies producing carbon bicycles frames is nil. In this study, we analyze the frames of existing foreign brands and analyze the deformation and stress concentration area according to the load of the frame, using the finite element analysis. In addition, we set up the range of stiffness based on the content of the structural analysis, to localize the carbon bicycle frame and famous foreign products, and compare the prototype with the stiffness by using bicycle molds for track races.

• 디지털융복합연구
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• 제11권12호
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• pp.735-745
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• 2013

관광산업은 여가시간의 증가와 함께 질적으로나 양적으로 큰 성장을 보이고 있다. 지역을 대표하는 관광콘텐츠 개발이 활발하게 이루어짐에 따라 관광콘텐츠는 지역을 방문하는 관광객에게 단순한 여행서비스를 제공하는 것을 넘어 최고의 경험을 제공하는 단계로 발전을 했다. 하지만 이러한 관광콘텐츠는 지역성의 차이 이외에는 그 구성이나 속성에 크게 차별성이 없는 명목상의 관광콘텐츠도 적지 않다. 관광콘텐츠가 개인에게 감동을 주고 이것이 소비로 이어지기 위해서는 개인에 대한 이해, 개인의 경험에 대한 이해가 필요하기 때문에 서비스 경제사회를 넘어 체험경제사회로 접어든 현재에 '경험'은 관광콘텐츠를 상품으로 기획, 개발하는 하나의 기준이 될 수 있다. 이러한 맥락에서 이 글에서 다루는 체험경제이론의 체험4요소와 몰입론의 Challenge-skill 모델은 양질의 관광콘텐츠를 기획/개발하는 단계에서 관광객의 경험을 구체화시켜주는 틀을 제공해줄 수 있다. 이 글은 결과적으로 콘텐츠를 일종의 체험으로 보았을 때, 체험4요소를 통해 최대의 즐거움을 제공할 수 있는 4가지 요소를 제안하였고, 몰입론을 통해 콘텐츠의 수준과 관광객의 이해라는 측면에서 제공되어야 하는 균형 잡힌 콘텐츠에 대해 제안하였다.