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계층적 센서 네트워크에서 균등한 에너지 소비를 위한 클러스터링 기법에 관한 연구
김요섭(Kim, Yo-Sup),홍영표(Hong, Yeong-Pyo),조영일(Cho, Young-Il),김진수(Kim, Jin-Su),은종원(Eun, Jong-Won),이종용(Lee, Jong-Yong),이상훈(Lee, Sang-Hun) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.9
에너지 효율성이 중요한 무선 센서 네트워크에서 클러스터링 기술은 클러스터 헤드 노드가 클러스터 멤버 노드의 데이터를 병합하여 싱크노드로 전송함으로써 센서노드와 싱크노드 사이의 통신 횟수를 줄여 에너지 효율을 얻는다. 본 논문에서는 분산형 클러스터링 라우팅 기법 중 대표적 프로토콜인 LEACH(Low Energy Adaptive Clustering Hierarchy)와 HEED(Hybrid, Energy-Efficient Distributed Clustering Approach)의 클러스링 기법에 대하여 분 석하고 이를 토대로 데드노드의 최대 지연 발생과 네트워크 라이프 타임을 증가하기 위한 새로운 에너지 효율적 클 러스터링 기법을 제안한다. 제안 방식은 클러스터 헤드가 각 멤버노드의 잔여에너지 정보와 싱크노드와의 위치 정보 를 기반으로 최적의 전송 효율을 위한 노드를 선출 하고, 선출된 노드는 이후 데이터 전송과정에서 클러스터 헤드로 부터 데이터를 전송받아 싱크노드로 전송하는 방식으로, 네트워크를 형성하는 개별 노드의 에너지 소비를 균등하게 하여 네트워크의 전체 수명을 증가시키는데 본 연구의 목적이 있다. 제안한 방식의 성능을 검증하기 위해 시뮬레이션 을 통해 기존의 클러스터링 기법과 비교 분석하였다. 그 결과, 기존의 기법에 비해 네트워크의 생명주기가 약 5~10% 향상되는 것을 확인 할 수 있었다. The Clustering technology of Energy efficiency wireless sensor network gets the energy efficiency by reducing the number of communication between sensor nodes and sink node. In this paper, First analyzed on the clustering technique of the distributed clustering protocol routing scheme LEACH (Low Energy Adaptive Clustering Hierarchy) and HEED (Hybrid, Energy-Efficient Distributed Clustering Approach), and based on this, new energy-efficient clustering technique is proposed for the cause the maximum delay of dead nodes and to increase the lifetime of the network. In the proposed method, the cluster head is elect the optimal efficiency node based on the residual energy information of each member node and located information between sink node and cluster node, and elected a node in the cluster head since the data transfer process from the data been sent to the sink node to form a network by sending the energy consumption of individual nodes evenly to increase the network's entire life is the purpose of this study. To verify the performance of the proposed method through simulation and compared with existing clustering techniques. As a result, compared to the existing method of the network life cycle is approximately 5-10% improvement could be confirmed.
유승흠,이용호,조우현,홍영표,진병원,김상재,Yu, Seung-Hum,Lee, Yong-Ho,Cho, Woo-Hyun,Hong, Young-Pyo,Jin, Byoung-Won,Kim, Sang-Jai 대한예방의학회 1986 예방의학회지 Vol.19 No.1
A Nationwide health care utilization survey was conducted from March 11 to September 19, 1985 to assess the level of illness and the magnitude of medical care utilization. A probability sample of 15,427 persons was taken from 180 Enumerated Districts designated by the Economic Planning Board. Of those 4,500 housewives were proxy respondents. A interview was conducted with pre-tested questionnaire schedule which was recorded by well trained interviewers. Age and sex compositions of the study population were similar to those of general population structure in 1985. The major findings of this survey are as follows : 1) A total of 64.5% of the study population lived in city area and 35.5% lived in county area. 2) While no difference was observed in interview rate between city and county area, it showed statistically significant difference in the medical security program coverage rate between the two areas(44.7% and 37.1%, respectively) 3) Morbidity rate was 79 per 1,000 persons during the two week periods. There was difference in age and sex adjusted morbidity rates between city and county area. Furthermore morbidity rates by the status of the program were significantly difference between the two areas. 4) Average ambulatory care utilization rate was 7.2 visits per person per year and average admission rate was 1.8 per 100 persons per year. There was significant difference in average ambulatory care utilization rate by the program. but no significant difference in medical utilization rate between city and country area. 5) The major symptoms of the perceived illness was the respiratory system(44.1%). 6) A total of 50.4% of the perceived illness among the covered group by the program were treated at the hospital and clinics, but those who are not covered used primarily drug stores(61.3%).
여성농업인의 경영주 등록 결정에 대한 일.생활 분야 영향요인
한지영(Jiyoung Han),남중수(Jungsoo Nam),김용(Yong Kim),홍영표(Young Pyo Hong) 한국농촌지도학회 2021 농촌지도와 개발 Vol.28 No.4
This study aims to identify the factors influencing the registration of managers or co-managers in agricultural management in the field of work and life of female farmers and to derive implications for expanding the regis-tration of female farmers as managers and securing the status of women. In this study, binomial logit analysis was conducted with 1,043 questionnaire responses collected on&offline to achieve the research purpose. As a result of the analysis, it was found that the duration of farming, decision-making initiative, the experience of the supporting policies for farming activity, the activities of the crop group/research or female farmer’s group, and the experience of supporting policies for self-development and leisure activities had a statisticallty significant effect on the registration of female farmers.
신도시 개발단계에서의 수열에너지 수요예측 및 적용 타당성 분석
이태구(Tae Gu Lee),강한기(Han Ki Kang),문정환(Jung Hwan Moon),박용성(Yong Sung Park),홍영표(Young Pyo Hong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
Feasibility of the application of hydrothermal energy was carried out during the development stage of the new city. The construction cost was calculated and the district heat source was compared on the basis of the same area. The energy usage has excellent thermal efficiency at the level of 48% compared to the district heat source, and the annual operating cost is also about 23%. Hydrothermal energy demand prediction was established and the evaluation items, impact factors, weights and scoring criteria were refined. Demand assessment by building was re-selected by forecasting demand, and optimizing the hydrothermal network.