• Proceedings of the KGS Conference
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• 2003.11a
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• pp.100-105
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• 2003

최근 정보통신기술의 발달과 그에 따른 변화에 있어서 가장 주목할만한 점은 인터넷의 확산이라고 볼 수 있다. 인류역사상 가장 빠른 속도로 확산된 미디어로 '제3의 혁명' 이라고까지 일컬어지고 있는 인터넷은 세계적으로5.4억 명 이상의 사용자가 있으며, 국내 이용자도 약 2,500만 명에 이르고 있다. 이러한 인터넷은 단순한 정보교환의 수단만이 아니라 새로운 시장을 창출하고 기업의 비용을 혁신적으로 절감시키면서 인터넷 관련 산업들이 새로운 경제의 주축을 차지하게 되면서 디지털 경제, 인터넷 경제, 또는 신경제라는 신조어들이 등장하고 있다. (중략)

• Journal for History of Mathematics
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• v.20 no.4
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• pp.49-60
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• 2007

In this article, the concept of rigidity of smooth surfaces in the three dimensional Euclidean space which naturally arises in elementary geometry is introduced, and the natural process of the development of rigidity theory for compact surfaces and its generalizations are investigated.

• Journal of the Korean Geographical Society
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• v.5
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• pp.31-40
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• 1970

도시지리학은 도시사회학으로, 또한 공간경제학의 측면에서 계통화되어가고 있음에도 불구하고, 우리나라에서는 2, 3의 지리학자에 의하여 도시분류를 시도하는 단계에 있고, 일부 사회학자에 의하여 토지이용, 지역배치 등이 개척되었으나 도시구조에의 approach는 미흡한 면이 많다. 근래 지역개발이 고창되고 도시화에 따르는 제문제를 해결하려는 노력의 일환으로 여러 분야에서 많은 실적이 발표되어가고 있다. 본고은 이와 같은 시점에서 도시문제해결의 제1수단이 되는 도시역, 도심, 폭도심의 형성, 구심과 난심등에 걸쳐 서울의 예를 들어 조사분석을 시도하였다.

• Archives of design research
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• v.11 no.2
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• pp.83-92
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• 1998

If the Industrial Revolution had been the first industrial revolution. our 21st century will witness a second industrial Revolution. Namely. we will attest to a revolution whereby we will be freed from brain work by automation systems. computers and artificial intelligence. The technological revolution of the Information society has also resulted in various changes in the area of design. Designers almost depend on the newest computers of advanced functions to drastically reduce the production time. maximize the effects. save the cost and differentiate the design products for a stronger competitiveness. Accordingly. the media of design expression are changing. In short. the design works which had been done on the plane are now being expressed on the three-dimensional cyber space. Thus, this study alms to review the effects. positive and negative. of such a trend on the design.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2004.03a
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• pp.71-75
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• 2004

텔레매틱스 서비스를 통합적이고 원활하게 제공하기 위해서는 개별 시스템 구성 요소들 간의 연관관계를 규정하는 아키텍쳐의 수립이 필요하다. 현재 부분적, 개별적으로 연구 및 개발되고 있는 여러 시스템들의 기반이 되는 프레임워크(framework)로서의 텔레매틱스 아키텍쳐는 서비스가 활성화되기 전에 구축되는 것이 바람직하다. 본 논문에서는 외국의 국가 수준의 텔레매틱스 아키텍쳐의 구축 사례와 인접 분야인 ITS 분야의 국가 아키텍쳐를 고찰하여 텔레매틱스 아키텍쳐 구축을 위한 기본 방향을 제시하고자 한다. 본 논문은 총 4장으로 구성되었으며, 제1장 서론에 이어 제2장에서는 핀란드의 국가 텔레매틱스 아키텍쳐와 우리나라의 국가 ITS 아키텍쳐를 고찰하였다. 제3장에서는 제2장의 사례 고찰을 통하여 우리 나라의 텔레매틱스 아키텍쳐 구축 기본 방향을 제시하고 제4장에서 텔레매틱스 아키텍쳐 구축의 기대 효과와 향후 연구를 언급함으로써 결론을 맺었다.

• Journal of Korea Port Economic Association
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• v.24 no.3
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• pp.1-22
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• 2008

This paper deals with the waterfront development in Gwangyang Port (GP), Korea. This study aims to identify the waterfront development type and suggest its policy direction of international GP, Korea. It consists of three main sections: basic theory of port waterfront development, analysis of the experiences in port waterfront development, and the type and its policy directions of waterfront development in GP. This research is mainly based on a review of current reports / papers, an analysis of secondary data and a consultation with related experts. Port waterfront is an important area for increasing Gwangyang's attractiveness and strengthening its competitiveness. Considering port function in urban area, Gwangyang should thus implement the comprehensive plan for the port waterfront.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.30 no.2
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• pp.188-202
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• 1997

The seasonal variability of the sea surface winds over the last Sea of Korea (Japan Sea) is investigated by means of empirical orthogonal function (EOF) analysis. The combined representation of fields of three climatic variables by empirical orthogonal functions is discussed. The eigenvectors are derived from daily sea level pressure, wind speed and 10-day mean sea surface temperature (SST) during 15 years $(1978\~1992)$. The spatial patterns of the mean pressure are characterized by the high pressure in the western part and the low pressure in the eastern part. The spatial distribution of the standard deviation (SD) of pressure are characterized by max SD of 6.6 mb near the Vladivostok, and minima along the coast of the Japan. In Vladivostok, the maxima of SD of SST and south-north wind (WV) were also occurred. The representation of fields of individual meteorological variables by EOF shows that the first mode of the west-east wind (WU) explain over $47.3\%$ of the variance and the second mode of WU represents $30\%$. Especially, the first mode of the WV explain $70.9\%$ of the variance and their time series coefficients show 1-cpy, 0.5-cpy frequency spectrum. The spatial distribution of the first mode eigenvectors of SST are characterized by maximum near Vladivostok. The combined representation of fields of several variables (pressure, wind, SST) reveals that the first mode magnitudes of the variance of the combined eigenvectors (WU-PR) are increased. By means of this result, the 1-year peak and the 6-months peak are remarkable. In the three combined patterns (wind, pressure, SST), the second mode of the eigenvector (wind) is affected by the SST. Their time coefficients of the first mode show noticeable 1-year peak. The spectral analysis of the second mode shows broad seasonal signal with the period of 4-months and a significant peak of variability at 3-month period.

• Korean journal of applied entomology
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• v.24 no.1 s.62
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• pp.1-6
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• 1985

The data on the striped rice, borer populations, collected in the four years from 1973 to 1976, was reanalyzed to study the characteristics in the aggregation pattern of the insect larvae in the paddy fields. The distribution pattern of the larvae was well fitted to the negative binomial model in both the first and the second generation. With reference to the Green's coefficient of dispersion estimated, the aggregation of the larvae was categorized into three phases: initial high aggregation, changing, and dispersed stable phase. Except the changing phase, each phase in each generation could be defined by a common k. The phase-change was initiated by the larval dispersal between hills of the rice plants: the larvae of the third stage and those of the fifth stage, for the first and second generation, respectively. The characteristics of the aggregation pattern were stable in the second generation. In the first genaration, the pattern was more or less variable, indicating that the life system of the insect in the first generation was more susceptible to the variations of the external physical factors than that in the second generation.

• The Journal of the Acoustical Society of Korea
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• v.35 no.3
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• pp.216-222
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• 2016

Generation of a quiet zone in noisy environment is undoubtedly of considerable realistic significance. This paper describes development and implementation of a multichannel real-time active noise control (ANC) system for 3 dimensional noisy environment to enhance the quiet zone performance in terms of size and noise cancellation gain. The proposed ANC system employes a multichannel delay-compensated filtered-X least mean square (FXLMS) algorithm; its real-time implementation is designed in TMS320C6713 digital signal processor (DSP) board. The system is evaluated for cancelling various tonal frequency noises in the range from 100 to 500 Hz, and the performance is then illustrated by measuring the quiet zone in terms of sound pressure level (SPL) attenuation. Experiment results show that a quiet zone of quiet with satisfactory size and maximum 24 dB noise attenuation is successfully generated.

• Journal of the Korea Computer Graphics Society
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• v.25 no.2
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• pp.31-41
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• 2019

Extended Reality (XR), such as virtual and augmented reality, has huge potential for immersive data visualization and analysis. In XR, users can interact with data and other users realistically by navigating the shared virtual space, allowing for more intuitive data analysis. However, creating a visualization in XR also poses a challenge because complicated, low-level programming is required, which hinders broad adaptation in visual analytics. This paper proposes an interactive visualization authoring tool based on hand gesture for immersive data visualization-Gadget Arms. The proposed system provides a novel user interaction to create and place visualization in the 3D virtual world. This simple, but intuitive, user interaction enables user designs the entire visualization space in the XR without using a host computer and low-level programming. Our user study also confirmed that the proposed user interaction significantly improves the usability of the visualization authoring tool.