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건강돈(健康豚)의 혈액상(血液像)에 관(關)한 구연(究硏)
조충호,Cho, Choong-Ho 대한수의학회 1962 大韓獸醫學會誌 Vol.2 No.2
The blood samples of 280 suckling pigs and of 300 adult pigs were studied in a hope to establish normal hemograms of swine as reared in Korean local conditions. The examination included total counts of erythrocytes, leukocytes differential count, hemoglobinometry, and reticulocyte count. The results of this study are summarized as following. 1. Higher erythrocyte count was observed in adult pigs as compared with the values reported by other workers. The normal erythrocyte value for malewas $8.4{\pm}0.9$ millions with approximately 0.6 million less for female. 2. Relatively higher hemoglobin concentration was measured in the piglets at birth, which slightly decreased in piglets of 2nd and 3rd weeks. The Hb concentration was highest in piglets of 5th week amounting to 15.8gm/100ml of blood, and it gradually decreased to the adult-level thereafter. 3. The average diameter of erythrocyte was $6.6{\pm}0.72{\mu}$ in suckling pigs and $6.3{\pm}0.11{\mu}$ in adult pigs. This shows that erythrocytes of piglets are larger than those of adult pigs and the mean diameter is also arger than reported by other investigators. 4. The lower mean percentages of eosinopils, basophils, monocytes were found both in the blood of suckling and adult pigs. 5. The other blood values were in general agreements with the values reported by other workers.
컴퓨터 엔지니어의 입장에서 본 전문가 시스템의 구현방법론
조충호(CHO Choong-Ho),이광형(LEE Kwang-Hyung) 한국정보과학회 1991 한국정보과학회 학술발표논문집 Vol.18 No.1
본 연구는 처음 전문가시스템을 만들때, 컴퓨터 엔지니어의 입장에서 현장전문가들과 대화 속에서 발생할 수 있는 어려움을 제거하기 위한 방법론을 전문가 시스템 AID [1]를 만들면서 느낀 실제 경험을 토대로 서술한다. 이를 위해 개발기간을 여러 단계로 나누어 각 단계별로 생길 수 있는 문제점과 이를 해결하기 위해 필수적으로 거쳐야 할 과정과 해결 방법을 제시한다. 따라서 제시된 방법론은 전문가시스템을 만들고 있거나 앞으로 만들려고 하려는 사람들에게 참고가 될 수 있을 것이다.
조충호(CHO Choong-Ho),임덕빈(IM Duk-Bin) 한국정보과학회 1991 한국정보과학회 학술발표논문집 Vol.18 No.2
IN(Intelligent Network)구조는 급변하는 기술사회에서 새로운 통신 서비스에 대한 가입자의 요구에 유연하게 대처할 수 있도록 설계되어져 있다. NICS(Network Information Control System)은 ETRI에서 개발한 IN 구조이다. 본 연구에서는 NICS의 실시간 서비스 관리 시스템 SCP(Service Control Point)에 대한 성능평가 문제를 다룬다. 성능은 트래픽 부하 변화에 따른 mean response time, throughputs, processors usage, average queue length의 변화율, 평균, 표준편차를 얻었다. 이 결과는 실시스템의 실측치와 비교 검증 되었으며, 과부하제어(overlond control)를 위해 결정되어야할 과부하 원인 factor결정을 위한 기준으로 제공된다.
소의 비외과적 수정란이식에 있어서 수태율에 영향을 미치는 요인
황우석,조충호,Hwang Woo-Suk,Cho Choong-Ho 한국임상수의학회 1988 한국임상수의학회지 Vol.5 No.1
An observational study was conducted to evaluate the effect of anterior pituitary gonadtropin on super-ovulation in donors, embryo quality, development stage of embryo, transfer location, corpus luteum quality of recipient, ease of transfer and induced versus natural estrus on pregnancy rates. The data were collected from 451 non-surgical transfers of fresh and frozen bovine embryos. 1. The average number of CL, formed in ovaries which were stimulated with follicular stimulating hormone, and/or APG, were 11. 1${\pm}$1.21, 12.3${\pm}$1.84, respectively. The numbers of embryos recovered were 8.2${\pm}$1.35, 8.7${\pm}$ 1.39, and the numbers of transferable embryos were 6.4${\pm}$0.98. 6.6${\pm}$1.01. respectively. 2 There was no effect of spontaneous versus prostaglandin-induced estrus of recipients on pregnany rates of either fresh (61.5% vs. 59.5%) or previously frozen(54.5% vs. 58.5%) embryos. 3. There were significant differences(p<0.05) in pregnancy rates for embryo grade 1(63.6%), grade 2 (45.4%) and grade 3 (30.4%) in fresh group and for grade-1 (60.5%), grade-2 (47.8%) and grade-3 (18.1%) in previously frozen embryos. 4. The recipients transfered with embryo morulae were found to have a lower (p<0.05) pregnancy rates than those transfered with embryos of blastocyst in be th fresh and previously frozen embryos. 5. There was no significant difference between transfer locations in pregnancy rates using both fresh and frozen embryos. 6. Attempts to select recipients for high pregnancy rates on the basis of corpus luteum (CL) quality were performed. CL were classified into 3 quality grades, on the basis of size and prominence. Quality grades 1 and 2 group had higher (p<0.05) pregnancy rates than grade-3 group using both fresh and frozen embryos. 7 Ease of transfer was ranked to a scale of one to three on the basis of increasing difficulty (time required). Transfers ranted as ease score 1 and 2 had significantly higher (P<0.05) pregnancy pregnancy rates (45.8%, 66.6%) than ease score 3 (27.7%, 31.8%) using both fresh and frozen embryos respectively.
WPAN 환경에서 AFH 알고리즘을 사용하는 블루투스 피코넷의 패킷 간섭과 주파수 충돌 회피를 위한 적응적 Frequency Hopping Algorithm
김승연,이형우,조충호,Kim, Seung-Yeon,Lee, Hyong-Yoo,Cho, Choong-Ho 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.9b
본 논문에서는 AFH 알고리즘을 사용하는 블루투스로 이루어진 피코넷이 WLAN과 공존할 때 피코넷 패킷 간의 충돌을 다중 경로 페이딩 채널을 고려하여 수학적으로 분석하였다. AFH에 의해 줄어든 블루투스의 홉 수와 패킷 주변의 피코넷의 신호 세기에 따라 패킷의 충돌 확률에 영향을 줄 수 있음을 알 수 있다. 또한 본 논문에서는 AFH이 갖는 한계를 인식하고 이를 극복하고자 AAFH 알고리즘을 제안하였다. AAFH은 계속적인 채널 사용 여부에 따라 채널 상태의 확인 여부(scanning)를 결정하게 되는데 AFH 와 비교했을 때 collision와 waste 양에서 큰 차이를 보이지 않으면서도 채널 scanning 수가 최대 50% 감소하게 되어 블루투스의 에너지 낭비가 줄어들게 됨을 보였다. In this paper, we present an analysis of the throughput when there are multiple piconets and WLAN sharing the ISM bands. The analysis takes channel propagation characteristics and the capture effect. We also propose an algorithm which can be used to reduce the amount of channel scanning. By using traffic prediction of the interfering WLAN, we are able to maintain a reasonable performance in terms of fraction of time channel is wasted due to collisions or unused channel. Through computer simulation, we demonstrate that the proposed algorithm achieves reduced scanning frequency.