• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2005.04a
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• pp.381-384
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• 2005

암반의 단열은 현재까지의 대상암석에 기록된 변형이력의 하나로서, 이는 지하수유동이나 암반의 안정성 해석에 중요한 정보가 된다. 본 연구에서는 대전 유성지역의 암반의 단열 파악을 목적으로, 초음파 텔레뷰어(BHTV) 검층 자료를 선정하여 D/B를 구축하였다. 구축한 D/B를 토대로 시추공의 속성 자료를 3차원 가시화하여 단열분포에 대한 이해를 증진시키고자 하였으며, 3차원 가시화는 GIS의 소프트웨어인 ArcGIS의 AML (ArcMacro Language)을 이용하여 표현하였다. 이러한 연구방법을 통하여 사용자는 암반의 단열 분포를 정확하고, 효과적으로 파악할 수 있을 것이다.

• Proceedings of the CALSEC Conference
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• 1999.11a
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• pp.687-701
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• 1999

“Create Data Once, Manage Effectively, Use Often” ◆ DoD(Department of Defense) “기술정보 및 비지니스정보를 정부와 민간 기업이 협동하여 개발하고, 이의 관리, 교환 및 운용을 위해 최신의 기술과 표준을 사용하여 데이터 공유체계를 구축하는 것 ” (중략)

• Journal of Digital Convergence
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• v.12 no.10
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• pp.265-270
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• 2014

Existing speech recognition algorithm have a problem with not distinguish the order of vocabulary, and the voice detection is not the accurate of noise in accordance with recognized environmental changes, and retrieval system, mismatches to user's request are problems because of the various meanings of keywords. In this article, we proposed to event based semantic ontology inference model, and proposed system have a model to extract the speech recognition feature extract using ERB filter. The proposed model was used to evaluate the performance of the train station, train noise. Noise environment of the SNR-10dB, -5dB in the signal was performed to remove the noise. Distortion measure results confirmed the improved performance of 2.17dB, 1.31dB.

• 한국정보통신설비학회:학술대회논문집
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• 2005.08a
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• pp.56-59
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• 2005

광가입자망의 궁극적인 목표라 할 수 있는 FTTH 서비스가 일부 지역에서 시범사업이 진행되고 있고, 금년 8월부터는 KT가 PON을 이 용한 FTTH 서비스를 제공할 예정이다. FTTH 서 비스를 위해서는 전송장치 및 서비스 개발과 동시에 전화국사에서 가입자까지 이르는 전송매개체인 광선로시설에 대한 효율적이고, 경제적인 구축 기술을 필요로 하게 된다. 본 논문에서는 FTTH구축을 위해 소요되는 선로시설을 대상으로 기술적 특징을 조사 분석하고, 주요 시설별 기능요구사항 및 선로시설 구축에 요구되는 특성 등을 분석하였다.

• Journal of Navigation and Port Research
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• v.27 no.4
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• pp.359-366
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• 2003

The paper describes on the construction and analysis of marine casualty numerical D/B (N-D/B) to implement Korean MArine Casualty Forecasting System (K-MACFOS). The main target of K-MACFOS is to broadcast the prediction number and risk level of marine casualties as like daily weather forecasting. The data relating to a total of 724 ship casualties in the west-southern sea area (33oN∼35oN, 124oE∼127oE) of Korean peninsula for 11 years (1990∼2000) have been compiled and converted into quantitative data with 14 numeric conversion scales. Through the statistical analysis using contour-map visualization, the usability of N-D/B and the casualty features of the target sea areas are discussed. In addition, the optimum year-band selection method is also proposed to provide correct N-D/B analysis and precise prediction of the number of marine casualties.

• The KIPS Transactions:PartB
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• v.11B no.6
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• pp.709-716
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• 2004

According to the current increase of the usefulness of information by Internet Communication network, several methods are proposed in which a specific domain information nay be efficiently constructed and serviced. This paper proposes Relationship Grouping of Fuzzy Filtering Objects for Multimedia Statistic Post-office Box Construction. The proposed method exploits RelCRO( $D_{omain}$, Gi), RelSRO( $D_{omain}$, Gi) and FAS in order to group using (equation omitted)-cut. To know how well the proposed method is able to work, this paper have test against the methods with 1600 items of multimedia type information, and our system are compared with Random-Key, OGM and the proposed method. The results shows that the proposed method provides the better performance than the other methods.

• Korea lubricating oil industries association bulletin
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• no.99
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• pp.22-26
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• 2001

• Aerospace Industry
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• v.75
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• pp.41-41
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• 2001

산업자원부와 산업연구원은 대내외 경제환경의 변화에 대한 한국산업 및 기업의 대응능력 수준과 결정요인, 전망 등을 실태조사하고 이에 기초한 산업 및 기업의 경쟁력 강화정책을 수립하기 위해 다음과 같이 산업내부구조에 대한 통계 데이터베이스(DB)를 구축하고자 합니다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.9 no.3
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• pp.330-337
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• 1998

In this paper, we fabricated a pair of circulaly polarized conical horn antennas for evaluating the scattering characteristics of a hemispherical reflector and of propagation characteristics in in-building environments, which is required for constructing a new wireless in-building communication system of microwave band consisted of a hemispherical reflector installed on the ceiling. The measurements show the fairly good features such that cross-polarization discremination more than 27 dB and axial-ratio less than 1.25 dB.

• Journal of Satellite, Information and Communications
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• v.7 no.1
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• pp.82-85
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• 2012

In this paper, we present the forward link ACM method to improve the link availability and system throughput. Also, we compare the prediction algorithm between slope based prediction and LMS algorithm. The simulation results show that the 99% of predicted values in LMS algorithm is within 3dB and that of predicted values in the slope based prediction method is within 4.5dB.