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상향링크의 프레임 크기와 경쟁슬롯에 따른 BWA 프로토콜의 성능평가
오성민,김재현,Oh Sung-Min,Kim Jae-Hyun 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.11B
DOCSIS and IEEE 802.16 define the usage and element of a MAP which is uplink control message. Standards does not include the details of MAP size and the number of contention slots affecting the performance of MAC protocols for DOCSIS and IEEE 802.16. In this paper, we analyzed the performance of throughput and access delay according to the MAP size and contention slot size. Based on the analytical results, we found the optimal MAP size and the number of contention slots. We found that the protocol shows best performance when the MAP size is 2msec and the number of contention slots is 8. The simulation results can apply to the network system parameters. The simulator can be used to optimize the system parameters in cable network, BWA and WiBro. DOCSIS와 IEEE 802.16 MAC 프로토콜의 MAP 메시지는 CM의 상향 채널 데이터 전송 영역을 할당하므로 프로토콜 성능에 영향을 미치게 된다. 하지만 MAP의 구성요소와 용도에 대한 정의만 표준안에 언급이 되어있고, MAP 메시지의 크기나 MAP 메시지 내의 경쟁슬롯의 수에 대한 정의는 언급되어 있지 않다. 본 논문에서는 MAP의 크기와 경쟁슬롯의 수에 따른 프로토콜의 성능을 분석하곤 분석 결과를 바탕으로 최적의 MAP 크기와 경쟁슬롯의 수를 구하였다. 실험 결과로 MAP의 크기는 2msec이고 경쟁슬롯의 수는 8개일 때 최적의 프로토콜 성능을 보임을 알 수 있었다. 본 연구의 결과는 네트워크 시스템 파라미터로 사용할 수 있으며 실험에 사용하였던 시뮬레이터는 케이블 네트워크, BWA 및 WiBro 시스템 파라미터의 최적화에 사용할 수 있다.
오성민 ( Sung-min Oh ),최지완 ( Jee-wan Choi ),박광현 ( Gwang-hyeon Park ),남하석 ( Ha-seok Nam ),이연수 ( Yeon-su Lee ),박성찬 ( Seong-chan Park ),한민우 ( Min-u Han ) 국군의무사령부 2019 대한군진의학학술지 Vol.50 No.1
Aedes albopictus(Skuse) is known as the major vector of human arboviruses that can transmit approximately 22 virus belonging to Togaviridae, Flaviviridae, Bunyaviridae families. Recently, Aedes albopictus has been suggested to be involved in the transmission of Zika virus in several countries, including Southeast Asia. In this study, Among the military units stationed in Incheon, two coastal units were selected and three inland units were selected, we used BG sentinel trap to collection mosquitoes from May to October. We have collected mosquitoes at intervals of 2 weeks and the total population of mosquito is 15,959. From among these 11,406 mosquitoes were Ae. albopictus, this accounted for 71.5% of the total mosquitoes which has greatly exceeded the national average of 23.8%. After we collected mosquitoes, we move immediately to the laboratory, classified mosquitoes and tested the pathogen in the way(1 pool contains maximum 50 mosquitoes) of a standard inspection method(Real-time PCR) by Korea Centers for Disease Control and Prevention. Although a total of 257 pools from the collected Ae. albopictus was performed. Flavivirus including Zika virus was not detected during study period. According to the study, white-rooted mosquitoes living in military areas have not yet been contaminated with pathogens such as Zikavirus.
오성민 ( Sung-min Oh ),최지완 ( Jee-wan Choi ),한민수 ( Min-su Han ),이연수 ( Yeon-su Lee ),정해도 ( Hae-do Jung ),유민상 ( Min-sang Yoo ),이지훈 ( Ji-hoon Lee ) 국군의무사령부 2018 대한군진의학학술지 Vol.49 No.1
Objectives : The unhygienic management for barracks restaurants causes distrust of civilians in peace time and loss of combat power in peace and war time. Although the restaurants are modernized by remodeling or construction, the sanitation checklist in the army regulation is still not revised for decades. So, this study was performed to improve the sanitary level of barracks restaurants by developing the sanitary checklist. Methods : We made the sanitation checklist based on the Food Hygiene Act and the reference literature and were consulted by Ministry of Food and Drug Safety and Korea Agency of HACCP Accreditation and Services. To verify effectiveness of the checklist, sanitary inspection was carried out for 28 barracks restaurants and 4 private foodservice centers by one inspector. Results : In the case of barracks restaurants, the hygienic level among the restaurants was different, with the average of 81.39, the highest point of 93, and the lowest point of 60. So, we could confirm that we needed to revise the sanitary checklist. The private foodservice centers also showed the average of 87.75, the highest point of 97, and the lowest point of 78. Therefore, even if this sanitary checklist developed in this study was applied to a private foodservice center, it was confirmed that a differentiated evaluation was possible. Conclusions : By using this checklist by the managers, inspectors, and commanders at each level, we expect to improve the sanitary level of the barracks restaurants and prevent non-combat losses caused by food poisoning accidents.