• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2417-2419
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• 2001

A path planning is one of the main subjects in a mobile robot. It is divided into two parts. One is a global path planning and another is a local path planning. This paper, using the formal two methods, presents that the mobile robot moves to multi-targets with avoiding unknown obstacles. For the shortest time and the lowest cost, the mobile robot has to find a optimal path between targets. To find a optimal global path, we used GA(Genetic Algorithm) that has advantage of optimization. After finding the global path, the mobile robot has to move toward targets without a collision. FLC(Fuzzy Logic Controller) is used for local path planning. FLC decides where and how faster the mobile robot moves. The validity of the study that searches the shortest global path using GA in multi targets and moves to targets without a collision using FLC, is verified by simulations.

• 대한가정학회지
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• 제48권1호
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• pp.41-54
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• 2010

The purpose of this study was to investigate the relationships among children's important self-domain, self-evaluation and global self-esteem by gender. Information was collected on 376 5-6th graders from elementary schools in Busan. The major findings were that 1) The self-evaluation of peer domain was the most powerful determinant on self-esteem in both boys and girls 2) The percentage that valued domain of family self was higher than the other groups in both boys and girls(boys 36.3%, girls 55.4%). 3) In boys' domains of peer self and computer self, important self-domain moderated the effect of self evaluation on global self-esteem.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.19-24
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• 2008

Many types of disasters are related to environmental problems. Today, frequently occurring disasters and global environmental problems have begun to threaten human life and welfare. Consequently, building sustainable communities requires assessing relationships between environmental problems and disasters using a broad, open approach and with a long-term perspective. This paper attempts to identify the need for conceptualizing disasters and environmental problems together by comparing mechanisms of both disasters and environmental problems, and attempts to integrate both of these seemingly different types of phenomena as similar types of risk threatening human existence. Based on this work, a chart is proposed for qualitatively organizing disasters, environmental problems and their mutual influences, as well as providing a framework for potential quantitative analysis. It is hoped this research serves to contribute to effective mitigation to both disasters and environmental problems in today's age of global environmental issues.

• 한국군사과학기술학회지
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• 제16권4호
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• pp.473-480
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• 2013

The purpose of this paper is to demonstrate that the genetic algorithm can be useful for the global path planning when the obstacles and current field data are given. In particular, the possibilities for a novel type small AUV mission deployment in tidal regions, which experience vortical currents, were examined. Experimental simulations show feasibility and effective in generate the global path regardless of current and obstacles. By choosing an appropriate path in space, an AUV may both bypass adverse currents which are too fast to be overcome by the vehicle's motor and also exploit favorable currents to achieve far greater speeds than motors could otherwise provide, while substantially saving energy.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 전력전자학술대회 논문집
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• pp.248-249
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• 2012

PV 어레이에 부분적으로 음영이 발생하면 그 P-V 특성은 여러 개의 MPP를 보인다. 이런 상황에서는 global MPP를 찾아내기 위한 특수한 기법이 요구된다. 본 논문에서는 기존에 제안된, 부분 음영 조건 발생 시 global MPP를 찾아내는 MPPT 기법을 개선하고 실험을 통하여 유효성을 검증한다.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제17권1호
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• pp.93-106
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• 2010

We employ the methods of Lattice Dynamical System to establish a global model extending the Walrasian evolutionary cobweb model in an independent single local market to the global market evolution over an infinite chain of many local markets with interaction of each other through a diffusion of prices between them. For brevity of the model, we assume linear decreasing demands and logistic supplies with naive predictors, and investigate the traveling wave behaviors of global price dynamics and show that their dynamics are conjugate to those of H$\acute{e}$non maps and hence can exhibit complicated behaviors such as period-doubling bifurcations, chaos, and homoclic orbits etc.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제16권2호
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• pp.243-254
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• 2009

The main purpose of this paper is to use the methods of Lattice Dynamical System to establish a global model, which extends the Walrasian evolutionary cobweb model in an independent single local market to the global market evolution over an infinite chain of many local markets interacting each other through a diffusion of prices between them. For brevity of the model, we assume linear decreasing demands and quadratic supplies with naive predictors, and investigate the spatially homogeneous global price dynamics and show that the dynamics is topologically conjugate to that of well-known logistic map and hence undergoes a period-doubling bifurcation route to chaos as a parameter varies through a critical value.

• 한국멀티미디어학회논문지
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• 제19권9호
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• pp.1659-1668
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• 2016

Understanding 3D structure of scenes is of a great interest in various vision-related tasks. In this paper, we present a unified approach for estimating depth from a single monocular image. The key idea of our approach is to take advantages both of parametric learning and non-parametric sampling method. Using a parametric convolutional network, our approach learns the relation of various monocular cues, which make a coarse global prediction. We also leverage the local prediction to refine the global prediction. It is practically estimated in a non-parametric framework. The integration of local and global predictions is accomplished by concatenating the feature maps of the global prediction with those from local ones. Experimental results demonstrate that the proposed method outperforms state-of-the-art methods both qualitatively and quantitatively.

• 한국IT서비스학회지
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• 제2권1호
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• pp.17-24
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• 2003

The rapid growth of Korean SI(System Integration) Industries have established the largest marketplace in Korean software markets. It is the high value added industry, which is knowledge-centered and technology-intensive. Korean SI industries are going on participating the global market as well as the foreign high technical services are introduced to Korea by WTO's contracts. In this thesis, we analysis Korean SI industries present state and characteristics, futhermore suggest the plan to expand the SI industries of Korea in the global competitive market.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2015년도 추계학술발표대회
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• pp.1455-1458
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• 2015

위 논문은 전방 카메라에 촬영된 내차의 전방 보닛 영역을 인식하는 알고리즘을 제안한다. 현재 스마트카나 무인카 등에서 사물인식을 위한 영상처리의 필요가 증가하고 있는데 영상처리의 실시간성을 위해서 ROI를 잘 한정할 필요가 있다. 이때 본 연구에서 제안한 보닛 영상을 효과적으로 검색 대상에서 배제하면 속도와 정확도에 도움이 될 것이다. 제안된 보닛 검출 방법의 핵심은, 사다리꼴을 형성하는 3개의 직선을 검출하여 보닛 영역 후보들을 찾고 이를 여러 프레임에 걸친 일관성을 관찰하여 종합 판단하는 것이다. 다양한 블랙박스 카메라에 촬영된 영상에 대해서 실험한 결과 실제 보닛과의 인식결과의 차이는 평균 5 픽셀이다.