김제 벼-보리 이모작 논에서 벼 재배기간동안의 CO2 및 에너지 플럭스의 계절적 변화

민성현 ( Sung Hyun Min ),심교문 ( Kyo Moon Shim ),김용석 ( Yong Seok Kim ),정명표 ( Myung Pyo Jung ),김석철 ( Seok Cheal Kim ),소규호 ( Kyu Ho So ) 한국농림기상학회 2013 한국농림기상학회지 Vol.15 No.4

본 연구는 전라북도 김제시 부량면 신용리의 벼-보리 이모작 논에 설치된 플럭스 관측시스템에서 2012년 벼 재배기간동안(6월 9일~10월 20일)에 연속적으로 관측된 플럭스자료를 활용하여, 논 생태계와 대기간의 CO2 및 에너지(현열, 잠열) 교환량의 계절적 변화를 분석하였다. CO2 및 에너지의 교환량은 미기상학적인 에디공분산법으로 추정하였고, 환경인자(순복사, 강수량 등)와 작물체 생육량(엽면적지수, 초장 등)도함께 측정·조사하였다. 관측된 플럭스자료는 보정과 결측보충의 과정을 거친 후 분석에 활용되었다. 결론적으로, 벼-보리 이모작 논 생태계에서 벼 재배기간동안의 CO2의 순생태계교환량(NEE)과 총일차생산량(GPP) 및 생태적호흡량(Re)은 각각 단위면적(m2)당-277.1, 710.3, 433.2g C로 분석되었다. Based on the results of continuous flux measurements at the Gimje paddy flux site in the southwestern coast of Korea, carbon dioxide and energy exchanges between customarily cultivated rice-barley double cropping paddy field and the atmosphere during the 2012 rice growing season (from 9th Jun. 2012 through 20th Oct. 2012) were analyzed. Carbon dioxide and energy (H, LE) fluxes were estimated by the eddy covariance method. Environmental parameters (net radiation, precipitation, etc.) and plant biomass (LAI, plant height, etc.) were measured along with fluxes. After the quality control and gap-filling, the observed fluxes were analyzed. The results have been showed that net ecosystem exchange (NEE), gross primary production (GPP), and ecosystem respiration (Re) during the rice cropping period were -277.1, 710.3, and 433.2 g C m-2, respectively.

심층 강화학습을 활용한 산업디자인

현민성(Min Sung Hyun),곽노준(No Jun Kwak) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.12

Deep Reinforcement Learning has developed rapidly in recent years and is likely to be applicable to a variety of real-world problems. In this paper, we examine the problems of industrial design and construct a reinforcement learning environment. In addition, we apply a representative Deep Reinforcement Learning methodology to examine experimentally whether industrial design is possible without human intervention. In the experiments, we achieved increased rewards in the reinforcement learning environments and better design results for the given tasks.

김제 벼-보리 이모작 논에서 보리재배 기간의 CO2 교환량의 계절적 변화

민성현 ( Sung Hyun Min ),심교문 ( Kyo Moon Shim ),김용석 ( Yong Seok Kim ),황해 ( Hae Hwang ),정명표 ( Myung Pyo Jung ),최인태 ( In Tae Choi ) 한국농림기상학회 2014 한국농림기상학회지 Vol.16 No.2

Rice-barley double cropping system is typical in southwestern part of South Korea. However, the information of carbon dioxide (CO2) exchange for barley growing season has still limited in comparison with rice. Using the eddy covariance (EC) technique, seasonal variation of CO2 exchange was analyzed for the barley growing season at a rice-barley double cropping field in Gimje, Korea. The effects of environmental factors and biomass on the CO2 flux also were investigated. Quality control and gap-filling of flux data were conducted before this analysis and investigation. The results indicated that CO2 uptake increased rapidly at tillering stage and maximum net ecosystem exchange of CO2 (NEE) occurred at the early of May, 2012 (-11.2g C m-2 d-1), when the heading of barley occurred. NEE, gross primary production (GPP), and ecosystem respiration (Re) during the barley growing season were -348.0, 663.3, and 315.2 g C m-2, respectively. In this study, an attempt has been made to measure NEE, GPP, and Re with the help of the EC system for the barley growing season for the first time in Korea, focusing on CO2 exchange between the biosphere and the atmosphere.

이종 시스템의 실시간 가상 통합 및 통합 쿼리 시스템

민성현(Seong-Hyeon Min),이상준(Sang-Joon Lee),곽호영(Ho-Young Kwak) 한국컴퓨터정보학회 2016 韓國컴퓨터情報學會論文誌 Vol.21 No.10

In this paper, we propose the building method for the unified IoT service platform between the variety of legacy systems with the heterogeneous structures and the operating environments. To accommodate the structural diversity of legacy systems, we develop a virtual integrated structure and interface abstracting method. By this, the new platform can use the data sources of the legacy systems as if the data source is in the new platform. In a manner without modification of the legacy systems with performing minimum tasks, we proposes a model that can be integrated without affecting the availabilities of the legacy systems.

ICT 공급망 보안기준 및 프레임워크 비교 분석

민성현(Seong-hyun Min),손경호(Kyung-ho Son) 한국정보보호학회 2020 정보보호학회논문지 Vol.30 No.6

최근 ICT 기업은 제품과 서비스들을 직접 설계, 개발, 생산, 운용, 유지 보수, 폐기 등을 직접 수행하지 않고 이를 외부에 위탁하거나, 외주업체가 담당하는 경우가 많아지고 있다. 위탁과 재위탁되는 과정에서 제품 및 서비스에 대한 취약점 관리 어려움 등으로 이로 인해 발생하는 공격 또한 증가하는 추세이다. 이에 대응하기 위해 해외에서는 ICT 공급망 보안 위험관리를 위한 기준과 제도를 만들어 운영 중이며, 다양한 사례 연구를 진행하고 있다. 또한, SBOM(Software Bill of Materials)등 기술적으로 공급망 보안 문제를 해결하려는 연구도 진행하고 있다. ISO등 국제표준화기구에서도 ICT 공급망 보안을 위한 기준과 프레임워크도 만들어졌다. 본 논문에서는 미국, EU 등 주요 국가와 국제표준으로 개발된 ICT 공급망 보안기준과 제도를 비교 분석하여 국내 실정에 적합한 ICT 공급망 보안 관리 항목을 제시하고 ICT 공급망 보안제도 수립을 위한 사이버 보안 프레임워크의 필요성을 설명한다. Recently, ICT companies do not directly design, develop, produce, operate, maintain, and dispose of products and services, but are outsourced or outsourced companies are increasingly in charge. Attacks arising from this are also increasing due to difficulties in managing vulnerabilities for products and services in the process of consignment and re-consignment. In order to respond to this, standards and systems for security risk management of ICT supply chain are being established and operated overseas, and various case studies are being conducted. In addition, research is being conducted to solve supply chain security problems such as Software Bill of Materials (SBOM). International standardization organizations such as ISO have also established standards and frameworks for security of ICT supply chain. In this paper, we presents ICT supply chain security management items suitable for domestic situation by comparing and analyzing ICT supply chain security standards and systems developed as international standards with major countries such as the United States and EU, and explains the necessity of cyber security framework for establishing ICT supply chain security system.

oneM2M 데이터 필터 규칙 확장을 위한 육하원칙 기반 자원 관리 모델

민성현(Seong-Hyeon Min),곽호영(Ho-Young Kwak),이상준(Sang-Joon Lee) 한국컴퓨터정보학회 2016 韓國컴퓨터情報學會論文誌 Vol.21 No.9

In this paper, we study the domain-independent sensor data structuring method and the derivations about ‘ Filter Criteria’ expansion factors of heterogeneous domain systems. For this purpose, we propose a 5W1H based information search and retrieval method without knowledges about the target domains. And we also suggest a resource management model that can support expanding search of information. By the suggested method, the oneM2M standard able to implement the use-cases like ‘data exchanging between the heterogeneous domains’.

개인용 스마트기기의 알림강도 최적화를 위한 휴리스틱 상황정보 처리

민성현(Seonghyeon Min),이상준(Sang-Joon Lee) 한국지능정보시스템학회 2013 한국지능정보시스템학회 학술대회논문집 Vol.2013 No.6

본 논문에서는 사용자의 상황정보를 바탕으로 개인용 스마트기기의 알림 강도를 최적화하는 휴리스틱 기법을 제시한다. 개인용 스마트 기기들이 널리 보급됨에 따라 다양한 상황 정보가 생산되고 있으며, 이런 정보들은 서비스 개인화 및 최적화에 활용될 수 있다. 특히 스마트폰의 확산과 함께 SNS알림, 이벤트 알림과 같은 각종 알림 기능의 사용 빈도도 함께 증가하고 있는데, 상황에 맞지 않는 알림 서비스로 인해 사용자가 불편을 겪을 수 있다는 문제가 있다. 이 문제의 해결을 위해, 먼저 알림 서비스와 관련 있는 사용자 정보를 정의하고, 각 정보를 유형별로 점수화하여 활용한다. 그리고, 사용자의 반응을 바탕으로 정보 유형별 점수를 최적화함으로써 사용자의 상황에 더욱 적합한 서비스를 제공할 수 있는 모형을 제시한다.

김제 벼-보리 이모작 논에서 보리재배 기간의 CO₂ 교환량의 계절적 변화

민성현,심교문,김용석,황해,정명표,최인태,Min, Sung-Hyun,Shim, Kyo-Moon,Kim, Yong-Seok,Hwang, Hae,Jung, Myung-Pyo,Choi, In-Tae 한국농림기상학회 2014 한국농림기상학회지 Vol.16 No.2

전라북도 김제시 부량면 신용리의 벼-보리 이모작 논에 설치된 플럭스 관측시스템에서 보리 재배기간동안(2011년 10월 27일~2012년 6월 8일) 연속적으로 관측된 플럭스 자료를 활용하여, 보래재배 논 생태계와 대기간의 $CO_2$ 교환량의 계절적 변화를 분석하였다. $CO_2$ 및 에너지의 교환량은 미기상학적인 에디공분산법으로 추정하였고, 환경인자(순복사, 강수량 등)와 작물체 생육량(엽면적지수, 초장 등)도 함께 측정 조사하였다. 관측된 플럭스 자료는 보정과 결측보충의 과정을 거친 후 분석에 활용되었다. 결론적으로, 벼-보리 이모작 논생태계에서 보리 재배기간동안의 보리생육은 $CO_2$의 순생태계교환량(NEE)에 큰 영향을 주는 것으로 분석되었다. 보리 건물중이 급격하게 증가되는 분얼단계에서 가장 많은 $CO_2$가 흡수되었으며, 출수개화기가 관측된 5월 상순에 가장 높은 NEE ($-11.2gCm^{-2}d^{-1}$)가 관측되었다. 보리 재배기간중의 누적 순생태계 교환량(NEE)과 총일차생산량(GPP) 및 생태적 호흡량(Re)은 각각 단위면적($m^2$)당 -348.0, 663.3, $315.2gCm^{-2}$로 분석되었다. 본 논문은 국내에서 보리 재배기간의 $CO_2$ 플럭스를 에디공분산기법으로 정량화한 최초의 연구결과이며, 향후 벼-보리 이모작 논 생태계의 $CO_2$ 수지 평가의 기초자료로 활용될 것으로 기대한다. Rice-barley double cropping system is typical in southwestern part of South Korea. However, the information of carbon dioxide ($CO_2$) exchange for barley growing season has still limited in comparison with rice. Using the eddy covariance (EC) technique, seasonal variation of $CO_2$ exchange was analyzed for the barley growing season at a rice-barley double cropping field in Gimje, Korea. The effects of environmental factors and biomass on the $CO_2$ flux also were investigated. Quality control and gap-filling of flux data were conducted before this analysis and investigation. The results indicated that $CO_2$ uptake increased rapidly at tillering stage and maximum net ecosystem exchange of $CO_2$ (NEE) occurred at the early of May, 2012 ($-11.2gCm^{-2}d^{-1}$), when the heading of barley occurred. NEE, gross primary production (GPP), and ecosystem respiration (Re) during the barley growing season were -348.0, 663.3, and $315.2gCm^{-2}$, respectively. In this study, an attempt has been made to measure NEE, GPP, and Re with the help of the EC system for the barley growing season for the first time in Korea, focusing on $CO_2$ exchange between the biosphere and the atmosphere.

Modal Stiffness reduction method의 개념을 적용한 보행자 보호용 Hood Structure의 Passive Design

표정현(JungHyun Pyo),홍정화(JungHwa Hong),김훈희(HunHee Kim),민성기(SungKi Min),고은영(EunYoung Ko) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

There have been many studies of passive systems in an effort to decrease the worst fatal head injuries in pedestrians from car accidents. A passive system of structural improvements in vehicles has been a major focus in the motor industry in an attempt to reduce the number road deaths and injuries. The HIC (head injury criterion) is a quantity for head injuries that was obtained by integrating the acceleration that is measured by a head-form impactor for a fixed amount of time. In general, the hood should be designed with lower stiffness to decrease the HIC value. This study introduced a method for decreasing the hood stiffness by making a hole on the inner hood panel. To determine the most effective hole position on the inner hood panel, the concept of modal stiffness was considered. The FRF (frequency response function) results for vehicle model on head-form impact simulation were obtained. In addition, modal analysis of the entire vehicle model was carried out simultaneously. Subsequently, using the results of these two analyses, adequate hole positions at each modal frequency were selected and the inner hood panel was improved by making a hole on these positions. Finally, through head-form impact simulations on the improved vehicle model with the hole, it was demonstrated that the new method applied in this study is acceptable and useful. In conclusion, the improved vehicle model with a 40㎜ diameter hole on the inner hood panel showed a significant reduction in the HIC; approximately 12.2% compared to the original vehicle model. A significant reduction in the HIC can be achieved by making only a single hole on the inner hood panel. In addition, this new method is incredibly effective and simple, and can be applied immediately to currently produced vehicles as well as to various impact studies including head-form impacts.

실리카 코팅 AuNPs의 Langmuir-Blodgett 박막 제조

박민성 ( Min Sung Park ),최재유 ( Jae Yoo Choi ),정재연 ( Jae Yeon Jung ),정걸 ( Jie Cheng ),현진호 ( Jin Ho Hyun ) 한국 접착 및 계면학회 2010 접착 및 계면 Vol.11 No.4