• Journal of Digital Convergence
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• v.15 no.11
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• pp.497-511
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• 2017

The purpose of this study was to explore players' perception and emotional reaction toward referee's judgment. The participants of this study were six players (three male and three female) in 2016 national team. The results of this study are as follows: First, the differences in referee judgement were dependant on referees' subjective view point, rapid judging capability, qualification and experience. Second, we found that the a referee's judgement less affected match's results. The countermeasures against the adverse referee judgment include excitement, appeal, flow interruption, thought conversion, and concentration. Third, there were many opinions that both the degree of influence of the referee's judgement and the countermeasures was such that athletes were "not affected". In conclusion, the major determinant of players' performance were game strategy and accuracy of skill although the referee's judgement affected player's emotional reaction both in positive and negative ways.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.2
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• pp.230-235
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• 2009

This paper describes an automatic finite element mesh generation for finite element analysis of three-dimensional structures. It is consisting of fuzzy knowledge processing, bubble meshing and solid geometry modeler. This novel mesh generation process consists of three subprocesses: (a) definition of geometric model, i.e. analysis model, (b) generation of bubbles, and (c) generation of elements. One of commercial solid modelers is employed for three-dimensional solid structures. Bubble is generated if its distance from existing bubble points is similar to the bubble spacing function at the point. The bubble spacing function is well controlled by the fuzzy knowledge processing. The Delaunay method is introduced as a basic tool for element generation. Automatic generation of finite element for three-dimensional solid structures holds great benefits for analyses. Practical performances of the present system are demonstrated through several mesh generations for 3D geometry.

• Journal of Digital Convergence
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• v.11 no.11
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• pp.233-242
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• 2013

Securing the appropriability strategy of R&D funding for technology innovation is very important because R&D needs a lot of time and money. Appropriability means the environmental factors that govern an innovator's ability to capture profits generated by an innovation. Generally appropriability mechanism has five kinds, including patent, secrecy, lead time advantage, complementary sales & service, complementary manufacturing. In this paper, we surveyed domestic software industry professionals about appropriability mechanism strategy, and presented a result of priority of each factor and difference between previous research and this study, using the pair-wise comparison method. The result of study showed that domestic IT manufacturing companies prefer patent better than other appropriability mechanism.

• Journal of Korean Society of Steel Construction
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• v.25 no.3
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• pp.307-320
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• 2013

This paper proposes a new hybrid support structure by the driven piles which removes disadvantages of the existing type of support structure for offshore wind turbines. The hybrid type of support structure is combined with concrete cone and steel shaft, and is supported not only by gravity type foundations but also by driven piles. For three dimensional analysis of the huge and thick concrete structure, a solid-shell element that is capable of exact modeling and node interpolations of stresses is developed. By applying wave theory of stream function and solid-shell element in XSEA simulation software for fixed offshore wind turbines, a quasi-static analysis and natural frequency analysis of proposed support structure are performed with the environmental condition on Southwest Coast in Korea. In the result, lateral displacement is not exceed allowable displacement and a superiority of dynamic behavior of new hybrid support structure is validated by natural frequency analysis. Consequently, the hybrid support structure presented in this study has a structural stability enough to be applied on real-site condition in Korea. The optimized structures based on the preliminary design concept resulted in an efficient structure, which reasonably reduces fabrication costs.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.22 no.2
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• pp.163-172
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• 2009

BIM technologies based on three-dimensional parametric solid modeling can provide building industries with a wide range of information, and then enable not only to automate architectural drawings, detect clashes between building components, and estimate building materials, but also to manage effectively architectural and engineering information about building spaces, structures, energy, just-in-time delivery, facility management, and code checking. This paper presents an implementation to extract geometric data from IFC files, and validates the system with simple and complex buildings.

• Journal of Korean Society of Forest Science
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• v.106 no.4
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• pp.509-517
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• 2017

This study was conducted to assess effect of thiacloprid fogging on non-target insect communities in Korean white pine forests. In addition, we assessed effect of thiacloprid fogging on mortality of Monochamus saltuarius as a vector of pine wood nematodes, and Apis mellifera as a non-target species. We compared abundance, species richness, and compostion of insects, and mortality of two insects among four treatment groups (control and thiacloprid-fogged groups with 3 different doses) located in the Kangwon National University Forest. For sampling of insects, 6 pitfall and 2 multi-funnel traps and 3 waterproof cloth sheets were placed in each study plot. In addition, M. saltuarius and A. mellifera were put into each meshed cage which installed at 7 m and 15 m heights in center of each study plot. Thiacloprid was fogged only once (middle May) in each plot using a fogging machine. Overall, thiacloprid fogging was appeared to be low toxicity to the abundance, species richness, and compostion of insects and mortality of A. mellifera, while it seems effectively impact on the mortality of M. saltuarius. However, thiacloprid fogging seems more influenced by microclimates in forests because the mortality of M. saltuarius in mesh cages was different according to heights and spatial locations. To control the population density and dispersal of M. saltuarius using by fogging techniques, therefore, it may be necessary to minimize the uncertainty about the effectiveness of thiacloprid fogging by improving the fogging techniques.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.07a
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• pp.250-251
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• 2010

디지털 카메라의 보급으로 이미지처리 분야에서 정지영상을 이용한 다양한 기술 개발이 화두가 되고 있다. 스테레오 영상은 정지영상보다 소비자의 시각적 욕구를 충족시킬 수 있는 영상을 표현하기 때문에 스테레오 영상기술에 대한 관심이 높아지고 있다. 본 논문에서는 하나의 카메라로 같은 객체를 다른 위치에서 찍은 2장의 정지영상을 통해 스테레오 영상을 제작하는 방법을 제안한다. 실험 영상으로 디지털카메라로 찍은 좌측 영상과 우측영상을 사용한다. 두 영상의 제어점이 될 코너를 검출한 후, 유클리드의 좌표로 바꿔준다. 이 좌표들을 통해 각 제어점에 인접해 있는 좌표 4개를 추출한다. 이 인접 좌표들이 우측 정지 영상의 인접 좌표에 매칭 되는 횟수를 계산하여, 가장 많은 매칭 좌표를 갖는 스케일 요소로 좌측 정지영상을 회전과 이동시켜 목적 영상인 우측 영상에 매칭시킴으로써 스테레오 영상을 구현한다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1997.03a
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• pp.209-222
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• 1997

생산시스템에 있어서 스케쥴링 문제에 관한 이론적 연구는 종래부터 많이 연구되어 왔지만, 그 대부분은 작업의 가공시간이 확정적(deterministic)인 경우의 평가척도(criterion)를 고려한 것이었다. 그러나 실제 노동집약형 산업이라든가 고장율이 높은 자동화 공장등에 있어서는 가공시간 또는 제조 리드타임이 확률적인 변동을 갖는 경우가 많다. 이러한 가공시간의 변동은 각 작업의 가공완료시각의 변동으로 되어 후공정의 작업계획에 중대한 영향을 미치게 된다. 따라서 가공시간이 확률적(probabilistic)인 경우의 생산 시스템을 대상으로 한 스케쥴링 문제에 관한 연구는 최근에 와서 연구되고 있는 실정이다. 본 연구에서는 종래의 단일 공정의 생산 시스템을 대상으로 n개의 작업이 확정적인 가공시간을 갖는 경우의 총체류시간(total flow time)과 납기(due date)의 평가척도에 관한 스케쥴링 문제를 가공시간이 확률적인 분포를 갖는 경우로 확장시킨 스케쥴링 문제를 제안한다. 그리고 납기에 있어서 평균 납기지연확률(mean probability of tardiness)을 최소화하는 스케쥴링 문제의 휴리스틱 해법을 제안하여 그 실용성을 검토하였다.

• Journal of Korea Society of Industrial Information Systems
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• v.2 no.1
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• pp.19-34
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• 1997

샌산시스템에 있어서 스케쥴링 문제에 관한 이론적 연구는 종래부터 많이 연구되어 왔지만, 그 대부분은 작업의 가공시간의 확정적인 경우의 평가척도를 고려한 것이었다. 그러나 실제 노동집약형 산업이라든가 고장율이 높은 자동화 공장 등에 있어서는 가공시간 또는 제조 리드타임이 확류적인 변동을 갖는 경우가 많다. 이러한 가공시간의 변동은 각 작업의 가공완료시각의 변동으로 되어 후공정의 작업계획에 중대한 영향을 미치게 된다. 따라서 가공시간이 확률적인 경우의 생산시스템을 대상으로 한 스케쥴링 문제에 관한연구는 최근에 와서 연구되고 있는 실정이다. 본 연구에서는 종래의 단일 공정의 생산시스템을 대상으로 n 개의 작업이 확정적인 가공시간을 갖는 경우의 총체류시간과 납기의 평가척도에 관한 스케쥴링 문제를 가공시간이 확률적인 분포를 갖는 경우로 확장시킨 스케쥴링 문제를 제안한다. 그리고 납기에 있어서 평균 납기지연 확률을 최소화하는 스케쥴링 문제의 휴리스틱 해법을 제안하여 그 실용성을 검토하였다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.27 no.6
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• pp.557-564
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• 2014

In this study, we present an algorithm that conducts an unique naming process for the bridge object through the solid object identification focused on 3D straight bridge model. For the recognition of 3D objects, the numerical algorithm utilizes centroid point, and solid object on the local coordination system. It classifies the object feature set by classifying the objects and members based on the bridge direction. By doing so, unique names, which contain the information about span, members and order of the object, were determined and the suitability of this naming algorithm was examined through a truss bridge model and a bridge model with different coordinate systems. Also, the naming process based on the object feature set was carried out for the real 3D bridge model and then was applied to the module on local server and mobile device for real bridge inspection work. From the comparison of the developed naming algorithm based on object identification and the conventional one based on field inspection, it was shown that the conventional field inspection work can be effectively improved.