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金英夫 中央醫學社 1974 中央醫學 Vol.26 No.3
Author studies on the microbial contamination in strawberries sold- at markets in Busan. This research is considered to be of great significance because straw-. 1erries is closely related to public health. For this study all samples were collected -at ten markets of Busan city in June 1973. The results obtained were as follows: 1) All samples were showed to the bacterial contamination of the coliforms. And twenty strains of Escherichia coli isolated from seven samples of strawberries. 2) In strawberries were found the general bacterial numbering from high 106.8X 106 to low 1.5 X 106 and average viable counts were 18.88 X 106 organisms per, gram. The coliform bacterial numbering from high 68X106 to low.1.0X105 and average viable counts in strawberries Were 10.4 X 105 organisms per gram. These numbers were very higher 'than that of international security limit in public health. 3) The excrement of men and animals were usually fertilized to the farm land, it, seemed possible for the strawberries to show such high contamination of the coliform bacteria.
김영부,한치문,Kim, Yeong-Bu,Han, Chi-Mun 한국전자통신연구원 1992 전자통신동향분석 Vol.7 No.2
현재 B-ISDN은 각국의 통신 사업자들에 의해 급속도로 개발 추진되고 있으나, system implementation시 시스팀의 대용량화 및 switch network의 throughput 향상 등 다양한 어려움을 극복하지 않으면 안된다. ATM 관련 선진 기술을 보유하고 있는 유럽과 일본의 통신 사업자에 의해 개발된 ATM 시험 모델 시스팀의 구성을 살펴봄으로써 B-ISDN의 상용화를 위한 제반 문제들의 일반적인 해결 방향을 파악하고자 한다.
무선랜 기반 e-Healthcare 시스템에서의 의료용 트래픽의 서비스 품질 보장을 위한 채널 접속 차별화 방안
김영부(Young Boo Kim),박은찬(Eun-Chan Park) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.6
The IEEE 802.11e EDCA (Enhanced Distributed Channel Access) mechanism has been proposed to improve the QoS (Quality of Service) of various services in WLANs (Wireless Local Area Networks). By differentiating the channel access delay depending on ACs (Access Categories), this mechanism can provide the relative service differentiation among ACs. In this paper, we consider that WLAN is deployed in medical environments to transfer medical traffic and we reveal that the quality of the medical traffic (in particular, ECG signals) is significantly deteriorated even with the service differentiation by IEEE 802.11e EDCA. Also, we analyze the reason for performance degradation and show that IEEE 802.11e EDCA has difficulty in protecting the transmission opportunity of high-priority traffic against low-priority traffic. In order to assure medical-grade QoS, we firstly define the service priority of medical traffic based on their characteristics and requirements, and then we propose the enhanced channel access scheme, referred to as DIFF-CW. The proposed scheme differentiates CW (Contention Window) depending on the service priority and modifies the channel access procedure for low-priority traffic. The simulation results confirm that the DIFF-CW scheme not only assures the QoS of medical traffic but also improves the overall channel utilization.