• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 D
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• pp.1441-1443
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• 1998

In this work, the effects of space charge was analyzed in removal efficiency of pollutant using dielectric barrier discharges. In order to investigate effects of space charge, two dielectrics(XLPE and TR-XLPE) was chosen which are different in space charge distribution. The simultaneously measurement of space charge and discharge current was carried out in XLPE and TR-XLPE with air gap by Pulsed-Electro-Acoustic Method in ac. Also, the removal efficiency is measured by classical ozone generator(von Siemens 1875). From the experimental results, we knew that the space charge distribution affects the discharge patterns. The more space charge is in surface, the quickly discharge initiates and the magnitude of discharge is increased when polarity changes. And these affect the removal efficiency of pollutant.

• 한국컴퓨터그래픽스학회논문지
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• 제20권3호
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• pp.9-17
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• 2014

본 논문에서는 대상이 되는 디지털 캐릭터가 기존 애니메이션 파이프라인에서 사용되는 수준의 복잡한 리깅을 가졌더라도, 해당 리깅의 리깅 공간(Rig-space)에 모션을 리타겟팅 할 수 있는 안정적이고 새로운 리타게팅 방법을 활용한다. 이를 위하여 다양하고 복잡한 방식으로 리깅된 서로 다른 캐릭터의 리깅 공간과 캐릭터 관절값 공간(Joint Parameter Space)간의 상관관계를 분석하고, 원본 모션을 최대한 보존하면서 효율적으로 리타게팅을 수행할 수 있는 비선형적 최적화 기법을 제안한다. 이로 인하여 애니메이터는 모션 캡쳐 등으로 얻어진 원본 모션을 수정할 때, 기존의 키프레이밍 작업과 동일한 리깅 파라미터를 사용할 수 있게 되어 직관적이면서도 빠르고 쉽게 모션을 수정할 수 있게 된다. 이 과정에서 애니메이터가 선호하는 작업 방식을 관찰한 후, 해당 과정을 최적화 과정에 반영함으로써 애니메이터가 수정하기에 매우 용이한 형태의 리타겟팅 결과물을 만들어 낼 수 있다.

• ETRI Journal
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• 제17권4호
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• pp.25-35
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• 1996

This paper derives the symbol error probability for quadrature amplitude modulation(QAM) with L-fold space diversity in Rayleigh fading channels. Two combining techniques, maximal ratio combining(MRC) and selection combining(SC), are considered. The formula for MRC space diversity is obtained by averaging the symbol error probability of M-ary QAM in an additive white Gaussian noise(AWGN) channel over a chi-square distribution with 2L degrees of freedom. The obtained formula overcomes the limitations of the earlier work, which has been limited only to deriving the symbol error rate(SER) of QAM with two branch MRC space diversity. The formula for SC space diversity is obtained by averaging the symbol error probability of M-ary QAM in an AWGN channel over the distribution of the maximum signal-to noise ratio among all of the diversity channels for SC space diversity has been reported yet. Analytical results show that the probability of error decreases with the order of diversity gain per additional branch decreases as the number of branches becomes larger. On the other hand, the performance of 16 QAM with MRC becomes much better than that of SC as the number of branches becomes larger. By giving the order of diversity, L, and the number of signal points, M, we have been able to obtain the SER performance of QAM with general space diversity. These results can be used to determine the order of diversity to achieve the desired SER in land mobile communication system employing QAM modulation.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2009년도 한국우주과학회보 제18권2호
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• pp.37.4-38
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• 2009

Rho et al.(2008) showed that the eccentricity parameter of a CME is an important indicator for forecasting CME geoeffectiveness. In this study we have tested a capability of the eccentricity parameter as an indicator of CME direction. For this work we considered 11 CMEs observed by both SOHO/LASCO and STEREO/SECCHI (2007-2008 from Temmer et al. 2009) coronagraphs. We have estimated earthward direction angles for these CMEs based on two different methods: (1) the eccentricity parameter from a single coronagraph SOHO/LASCO and (2) the triangulation technique using a pair of spacecrafts LASCO/STEREO-A and LASCO/STEREO-B. As a result, we have found that for 7 out of 11 CME events their direction angles are consistent with each other within $20^{\circ}$. This result demonstrates that the earthward direction based on the eccentricity parameter can be a good potential indicator for CME propagation direction.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2005년도 추계학술대회 논문집
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• pp.185-188
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• 2005

With the development of digital technology and the advent of the concept of well-being, kitchen will be worked as the center of housing and turn into multi-functional space. So a research is requested to consider the users' needs for kitchen based on their life characteristics. The purpose of this study is to find out housing lifestyles, and to search and analyze users' needs for kitchen planning according to their lifestyles. And then plans for kitchen design are suggested. The findings are as follows. (1) Housing lifestyles of users living in apartment are categorized into the type of network and trial & development, pursing the new environment and technology, the type of high quality and convenience, seeking the way to make housework easy and comfortable, the type of housework oriented and the type of unspecification. (2) The type of network and trial & development requests home automation, confrontation layout of counter-top, the type of high quality and convenience requests enlargement of kitchen space, the newest appliance and kitchen island, the type of housework oriented requests the efficiency of space utilization with a counter-top style table, and the type of unspecification asks space for study and office work. All of the types have needs for water use space, larger storing space and a Kimchi refrigerator.

• Journal of Astronomy and Space Sciences
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• 제39권3호
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• pp.87-98
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• 2022

The Far-UltraViolet (FUV) imager onboard the Ionospheric Connection Explorer (ICON) spacecraft provides two-dimensional limb images of oxygen airglow in the nightside low-latitude ionosphere that are used to determine the oxygen ion density. As yet, no FUV limb imager has been used for climatological analyses of Equatorial Plasma Bubbles (EPBs). To examine the potential of ICON/FUV for this purpose, we statistically investigate small-scale (~180 km) fluctuations of oxygen ion density in its limb images. The seasonal-longitudinal variations of the fluctuation level reasonably conform to the EPB statistics in existing literature. To further validate the ICON/FUV data quality, we also inspect climatology of the ambient (unfiltered) nightside oxygen ion density. The ambient density exhibits (1) the well-known zonal wavenumber-4 signatures in the Equatorial Ionization Anomaly (EIA) and (2) off-equatorial enhancement above the Caribbean, both of which agree with previous studies. Merits of ICON/FUV observations over other conventional data sets are discussed in this paper. Furthermore, we suggest possible directions of future work, e.g., synergy between ICON/FUV and the Global-scale Observations of the Limb and Disk (GOLD) mission.

• 천문학회보
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• 제46권1호
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• pp.49.3-49.3
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• 2021

The 76 cm telescope in Kyung Hee Astronomical Observatory is participating in the small telescope network of the SomangNet project, which started in 2020. Since the installation of the telescope in 1992, the system configuration has been changed several times. The optical system of this telescope has a Ritchey-Chrétien configuration with 76 cm in diameter and the focal ratio is f/7. The mount is a single fork equatorial type and its control system is operated by TheSkyX software. We use a science camera with a 4k × 4k CCD and standard Johnson-Cousins UBVRI filters, which cover a field of view of 23.7 × 23.7 arcmin. We are also developing the Kyung Hee Automatic Observing Software for the 76 cm telescope (KAOS76) for efficient operations. In this work, we present the standard star calibration results, the current status of the system, and the expected science capabilities.

• 한국엔터테인먼트산업학회논문지
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• 제15권4호
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• pp.141-155
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• 2021

본 연구는 벨기에 출신의 연출가 이보 반 호브(Ivo van Hove, 1958~)의 연출적 시노그래피의 특성을 고찰하고 그의 연출작 <파운틴헤드>(The Fountainhead)를 통해 시노그래피의 수행적 실제를 규명하는 것을 목적으로 하고 있다. 반 호브는 파격적이고 화려한 무대 연출과 관객참여를 동반한 작품 <로마 비극>(Roman Tragedies)을 통해 전 세계적으로 명성을 떨치게 되었다. 그의 공간적 특성들을 자세히 들여다보면 작품의 정수를 담아내면서도 관객의 수행적 전환을 이끌어내는 요소들을 발견할 수 있다. 따라서 반 호브의 대표작들의 수행적 공간 특성에 관해 상세히 고찰하고, 이것들이 작품 <파운틴헤드>에 어떻게 적용되었는지에 관해 논의하고자 한다. 이 작품은 반 호브만의 공간 연출의 특성을 드러내고 고유한 무대 언어를 보여주고 있으며 그의 독창적 연출미학을 공간에 투영한다. <파운틴헤드>의 공간적 특성을 네 가지로 나누어 고찰하였다. 첫째, 상호 병립하는 미디어와 아날로그의 현존의 공간, 둘째, 에너지로 채워진 배우의 물질성의 공간, 셋째, 새롭게 활성화되어 배우와 관객이 신체적으로 공동 현존할 수 있는 공간, 넷째, 환유작용을 통해 살아 움직이는 내러티브의 공간이 그것이다. 추후 반 호브의 공간미학에 대한 활발한 연구가 이루어지길 바라며 본 소고가 그의 연출적 시노그래피 연구의 작은 시발점이 되길 바란다.

• 한국실내디자인학회논문집
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• 제26권3호
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• pp.45-54
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• 2017

A social phenomenon that occurs in a physical space is said to be a complex system. However, space syntax, which is commonly employed by researchers to identify such social phenomena, has various limitations in interpreting their complexity. On the other hand, agent-based modeling considers a variety of factors including the personality of the agent, objective-oriented work flows, estimation according to time flows and better prediction of space use through diverse parameters depending the situation, as well as the characteristics of the space. The agent-based method thus has the potentials to be developed as an alternative to space syntax techniques. In particular, discrete event driven simulation(DEVS), which is part of the agent-based modeling method, embraces the concept of networks just like space syntax, which allows a possible theoretical linkage in the future. This study suggests a procedural model of agent-based DEVS reflecting two different connection methods, i.e. connections between adjacent areas and those of the entire space, and attempts to identify the relationship between the local and regional indices of space syntax. A number of spaces were selected as examples-one for a preliminary experiment and eight modified for the main experiment-and space syntax and DEVS were applied to each of them. The comparative analysis of the results led to the conclusions as follows: 1) Adjacent connections were closely related to local indices, while the whole-space approach to regional indices. Local integration shows both characteristics. 2) Observation of the time flow model indicated a faster convergence with the range of 1 to 3-fold of the total time of one lap, with the error of less than 10%. 3) The heat map analysis showed more obvious characteristics of using the space for the entire space rather than adjacent connections. 4) Space syntax shows higher eligibility than ABM.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 1999년도 가을 학술발표논문집 Vol.26 No.2 (2)
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• pp.227-229
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• 1999

과거 대부분의 CSCW(Computer-Supported Cooperative Work) 시스템은 특정 플랫폼에 의존하여 개발되었기 때문에 일반적으로 해당 플랫폼 환경이 구축되어진 조직 내에서만 사용이 가능하였다. 최근 어디서나 접근 가능할 수 있도록 플렛폼에 독립적인 환경을 지원하는 웹의 급속하고도 지속적인 성장에 따라 많은 CSCW 시스템들이 웹 환경을 통하여 사용할 수 있도록 구축되었고 또한 현재 개발중에 있다. 본 논문에서는 그러한 웹 기반 CSCW 시스템인 CoSpace 시스템의 설계와 구현에 대해 기술한다. CoSpace 시스템은 작업 그룹의 구성원들이 공동작업을 위해 웹 브라우저를 사용하여 정보를 쉽게 공유할 수 있는 공유 작업공간을 지원한다.