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- 저자 : 최관수 ( Choe Gwan Su ) (검색결과 2 건)
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노승환,기장근,박성균,최관수,No, Seung-Hwan,Gi, Jang-Geun,Park, Seong-Gyun,Choe, Gwan-Su 대한전자공학회 2000 電子工學會論文誌-TC (Telecommunications) Vol.37 No.4
무선 ATM은 이동 멀티미디어 단말기에 광대역 서비스를 제공할 수 있는 차세대 기술이다. 본 논문에서는 핸드오버 발생시 다시 새로운 셀에서 인접하는 셀로 핸드오버가 발생하는 경우를 대비하여 새로운 셀 내에 경로 재설정 COS에 관한 정보를 보관시켜 실제 핸드오버 발생시 COS를 찾는 시간을 감소시킴으로써 핸드오버 지연시간을 감소시키는 고속의 순방향 핸드오버 방식을 제안하였다. 또한 제안된 핸드오버 절차는 in-band 시그널링에 의해 셀의 순서를 보장한다. 제안된 알고리즘에 따라 핸드오버 지연시간이 시뮬레이션에 의해 분석되었으며, COS를 예약하지 않는 기존의 방식에 의한 핸드오버 지연시간과 비교하였다. Wireless ATM is the next-generation technology which can provide broadband services for mobile multimedia terminals. Proposed in this paper is a method of enabling fast handover by forming one cell group with the cell having the mobile terminal (MT) at present and six adjacent cells and storing information on COS which is to perform re-routing between new cell to which MT is moved when handover occurs and adjacent cells to which the MT can be handed over in new cells in advance. And the order of data cells is guaranteed by using the in-band marking cell during handover. Also the handover delay is analyzed and compared to the conventional handover method without COS reservation.
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한국인 산모에서 B형 간염 바이러스의 보유율 변화에 관한 연구
오은아 ( O Eun A ),정숙애 ( Jeong Sug Ae ),정만 ( Jeong Man ),심승식 ( Sim Seung Sig ),양인애 ( Yang In Ae ),최관수 ( Choe Gwan Su ),정남기 ( Jeong Nam Gi ) 대한내과학회 1990 대한내과학회지 Vol.38 No.6
N/A In an attempt to investigate the yearly changes of the HBsAg carrier rate by observing the HBsAg positive rate in full-term pregnant women who are definitely related to the vertical transmission of the hepatitis B virus, as well as to analyze the epidemiologic factors which influence the HBsAg positive rate in pregnant women, we tested HBsAg and checked the histories of about 20 epidemiologic factors in 10,359 prgnant women .who delivered at St. Columban`s Hospital in Mokpo City from April 1, 1985 to June 30, 1989. The results were as follows: 1) Overall HBsAg positivity in all 10,359 pregnant women was 7.9%. 2) The positive rate of HBsAg was unrelated to the frequency or degree of alcohol drinking,smoking, income, nutritional state, hygiene, education, religion, occupation, locality or, injections at home in pregnant women. 3) The positive rates of HBsAg were higher in cases who had acupuncture, venereal disease, who had more than four siblings, and who worked as an institutional worker or hospital staff. The positive rates of HBsAg increased significantly in cases who had blood transfusions(0.025<p<0.05), who had injections at hospitals(p<0.005), who had no hepatitis B vaccination(p<0.005), who had a family history of liver disease(p<0.001) and who were much older(p<0.005). 4) The positive rate of HBsAg was decreased significantly from 9.2% to 7.0% for five years(p<0.001). There were several factors which influence the HBsAg positivity every year. First, the rate of hepatitis B vaccination increased significantly(p<0.001), second, the number of pregnant women who had more than six siblings increased significantly(0.025<p<0.05) and third, the number of pregnant women who had acupuncture decreased significantly(p<0.001). But the number of pregnant women who were over 30 years old increased significantly(p<0.001). 5) The positive rate of HBsAg increased significantly from 7.2% to 13.0% as the age increased(p<0.005). There were several factors which influenced HBsAg positivity by age group. Although the rate of hepatitis B vaccination increased significantly in the older age groups(p<0.001), the positive rate of HBsAg increased more in the older age groups because the numbers of pregnant women who had acupuncture(p<0.001) and a family history of liver disease(p<0.005) increased significantly. The results suggest that the number of HBV carrier pregnant women in Korea decreased progressively every year. Although the rate of hepatitis B vaccination increased significantly, it was not so effective due to the small total number. The number of pregnant women who had acupuncture and a family history of liver disease increased significantly, especially those over 30 years old. So it is important to have a nationwide program of hepatitis B immunization and to educate people on how to interfere with the transmission route in order to eradicate hepatitis B in Korea.
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