• 한국통신학회논문지
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• 제35권9B호
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• pp.1416-1427
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• 2010

국내 스마트그리드 관련 기술 수준은 일부 분야를 제외하고 선진국들의 수준에 미치지 못하는 것으로 평가되고있다. 이러한 상황 하에서, 본 연구는 스마트그리드 발전의 필수요소인 관련 IT기술을 조망해보고, 스마트그리드 분야에서의 유망 IT R&D분야를 도출하고자 하는 목적으로 수행되었다. 유망 IT R&D 분야의 도출을 위해 스마트그리드 관련 IT기술들의 경제성, 정책부합성, 기술타당성을 평가하는 2단계의 과정을 거쳤고, 그 결과 (1) 센서, (2) 정보보호, (3) AMI 미들웨어, (4) 전력관리의 4대 분야가 유망 분야로 선정되었다. 이 가운데 센서와 AMI 미들웨어 분야는 경제적으로 타당성이 높은 분야이기 때문에 핵심기술 개발에 집중하여 선도적 제품을 타국가보다 세계시장에 빨리 내놓는 전략(Focusing & First Mover Strategy)이 요구된다. 정보보호 분야에서는 국가 기간산업 차원에서의 전력망 안정성 확보 기술 분야와 전력사용자 측면에서의 개인 기업정보보호 기술 분야로 나누어 R&D를 수행하는 R&D Sharing 전략이 기술개발의 효율성을 증대시킬 수 있겠다. 그리고 전력관리 분야는 한국전력 주도로 관리시스템의 요소기술들을 공동 개발하는 전략적 제휴(Strategic Alliance)가 바람직할 것이다.

• 에너지공학
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• 제19권2호
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• pp.57-61
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• 2010

국내 에너지자원 자급률을 높이기 위해서는 적극적인 해외유전개발투자를 통한 생산 유 가스전 매입, M&A, 기존 생산광구 증산 등을 추진해야할 것이다. 이를 위해서는 생산 유 가스전 평가, 설계, 운영 등과 관련된 핵심 전략 기술에 대한 확보가 필수적이라고 할 수 있다. 향후 지속적인 연구개발 지원을 통한 생산광구평가와 생산 최적 설계.운영 기술 축적으로 해외 매입 가능한 유 가스전의 증가와 기존 유 가스전의 생산량 증대, 효율적인 광구 운영을 통한 석유 가스 자주개발률 제고를 기대할 수 있을 것이다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.757-759
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• 2003

Understanding the area of the rice paddy fields is important, and suitable for it the remote sensing. SAR is effective to the monitor in Southeast Asia with the rainy season. The detection of the filled rice paddy fields by RADARSAT was tried in the north part of Bangkok Thailand, and in the Mekong river valley Cambodia, which ware the main rice production country in Southeast Asia. We get observation data by RADARSAT and fields all through a year around Bangkok. However, because the flood had occurred on the study area in 2002 observed, the detection only of the rice fields ware difficult.

• 대한산업공학회지
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• 제43권1호
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• pp.39-48
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• 2017

In a digital economy, users actively express their needs in many ways. Thus, many researchers analyze what users need and whether they are satisfied or not through opinion mining. In addition, they begin to find technology opportunities in heterogeneous technology fields. But they did not connect users' opinion to technology development process, only focused on natural language processing or marketing or manufacturing area. Also, heterogeneous technology fields are focused on fusion technology. Thus, this study suggests a novel approach that is based on sentimental value and can be applied to exploring technology opportunities in heterogeneous fields. Sentimental value is calculated from users' opinion through sLDA. The heterogeneous technology opportunity is explored by patent analysis. This research contributes to suggesting a hybrid methodology through patent and users' opinion. In addition, it can provide managerial efficiency by suggesting base data onto decision making.

• 정보보호학회논문지
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• 제19권4호
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• pp.137-142
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• 2009

최근까지 암호기술에 대해 알려진 공격이나 안전성 저하현상에 의해 국내외 주요기관들은 권장되는 암호기술의 종류, 사용기간, 안전성 파라미터 등을 명확하게 명시하고 있다. 이에 따라 국내 금융권에서도 일부 암호기술을 교체하기 위한 작업이 이루어져야 할 것이다. 본 논문에서는 금융권에서 시급히 이루어져야하는 금융권 암호기술 적용 현황파악 및 취약 암호기술 선별 등 선행작업과 금융권 암호기술관리 방안에 대해 살펴보고, 향후 암호기술의 안전성에 대한 급격한 변화에도 금융시스템의 신뢰도를 유지할 수 있도록 중장기적인 관점에서의 암호기술 관리방안에 대해 제시한다.

• Water Engineering Research
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• 제4권4호
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• pp.193-202
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• 2003

SWAT model was applied to estimate daily stream flow for Yongdam and Bocheong watersheds in Korea. The model was calibrated and validated for the two watersheds and a new routine was added to analyze runoff process in paddy fields. The model efficiencies for two watersheds were 0.77 and 0.65 for the calibration period, and 0.76 and 0.50 for the validation period, respectively. It showed that water balance method simulated the runoff from paddy fields more precisely than CN method in SWAT. As results, the SWAT model is applicable to Korean watersheds, and more accurate estimation is possible using daily water balance method in paddy fields.

• 천문학회지
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• 제31권2호
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• pp.89-93
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• 1998

An attempt is made to find the boundary tangential components of potential magnetic fields without constructing solutions in the entire domain. In our procedure, the magnetic energy is expressed as a functional of tangential and normal magnetic fields at the boundary and is minimized by the variational principle. This paper reports a preliminary study on two dimensional potential fields above a plane.

• 기술혁신학회지
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• 제6권3호
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• pp.373-390
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• 2003

With limited resources, proper allocation of the national R&D budget is very crucial matter for reinforcing the national competence, and the importance of selecting strategic R&D fields have been increasingly emphasized by technology policy-makers and CTOs. This paper deals with technology relevance/cluster analysis, which measures technological dependency and relevancy among technologies, and how it can be used for selecting the strategic R&D fields especially satisfying SMEs(small and medium enterprises)' specific needs. As a result of this study, technology-product tree composed of 7 major technology fields, 22 clusters, 41 groups, 335 core-need technologies and hundreds of related business items are produced that can be used for designing SMEs' R&D/business portfolio as well as R&D investment decision-making of the Ministry of Small and Medium Business Administration.

• Journal of Information Processing Systems
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• 제16권5호
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• pp.1001-1007
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• 2020

In recent years, machine learning algorithms are continuously being used and expanded in various fields, such as facial recognition, signal processing, personal authentication, and stock prediction. In particular, various algorithms, such as deep learning, reinforcement learning, and Q-learning, are continuously being improved. Among these algorithms, the expansion of deep learning is rapidly changing. Nevertheless, machine learning algorithms have not yet been applied in several fields, such as personal authentication technology. This technology is an essential tool in the digital information era, walking recognition technology as promising biometrics, and technology for solving state-space problems. Therefore, algorithm technologies of deep learning, reinforcement learning, and Q-learning, which are typical machine learning algorithms in various fields, such as agricultural technology, personal authentication, wireless network, game, biometric recognition, and image recognition, are being improved and expanded in this paper.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2015년도 학술발표회
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• pp.238-238
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• 2015

There are demands for water environmental analysis of discharge processes in paddy fields, however, it is not fully understood in nutrients discharge process for watershed modeling. As hydrological processes both surface and ground water and agricultural water managements are so complex in paddy fields, the development of lowland paddy fields watershed model is more difficult than upland watershed model. In this research, the improvement of SWAT (Soil and Water Assessment Tool) model for a paddy watershed was conducted. First, modification of surface inundated process was developed in improved pot hole option. Those modification was evaluated by monitoring data. Second, the monitoring data in river and drainage channel in lowland paddy fields from 2012 to 2014 were analyzed to understand discharge characteristics. As a case study, Imbanuma basin, Japan, was chosen as typical land and water use in Asian countries. In this basin, lowland paddy fields are irrigated from river water using small pumps that were located in distribution within the watershed. Daily hydrological fluctuation was too complex to estimate. Then, to understand surface and ground water discharge characteristics in irrigation (Apr-Aug) and non-irrigation (Sep-Mar) period, the water and material balance analysis was conducted. The analysis was composed two parts, watershed and river channel blocks. As results of model simulation, output was satisfactory in NSE, but uncertainty was large. It would be coming from discharge process in return water. The river water and ground water in paddy fields were exchanged each other in 5.7% and 10.8% to river discharge in irrigation and non-irrigation periods, respectively. Through this exchange, nutrient loads were exchanged between river and paddy fields components. It suggested that discharge from paddy fields was not only responded to rainfall but dynamically related with river water table. In general, hydrological models is assumed that a discharge process is one way from watershed to river. However, in lowland paddy fields, discharge process is dynamically changed. This function of paddy fields showed that flood was mitigated and temporally held as storage in ground water. Then, it showed that water quality was changed in mitigated function in the water exchange process in lowland paddy fields. In future, it was expected that hydrological models for lowland paddy fields would be developed with this mitigation function.