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정영한,류재정,Jeong, Young-Han,Ryoo, Jae-Jeong The Korean Society of Analytical Science 2010 분석과학 Vol.23 No.1
(R)-N-3,5-dinitrobenzoyl (DNB) phenylglycinol로 부터 만들어진 키랄 선택제가 라세미 Nacylnaphthylalkylamines의 분리에 HPLC 키랄 정지상으로 이용된 바 있다. 본 연구에서는 (R)-phenylglycinol 유도체 키랄 선택제를 이용하여 키랄 크로마토그래피와 NMR 분광법에 의한 광학순도를 측정하였다. NMR과 HPLC 실험결과를 참값과 비교하여 각 광학순도 측정값의 정확도와 정밀도를 계산하였다. NMR 방법의 오차는 +2.2%, 평균 RSD는 4.54% 이었고, HPLC 방법의 오차는 -3.5%, 평균 상대표준편차는 3.23% 이었다. (R)-N-3,5-dinitrobenzoyl (DNB) phenylglycinol derived chiral selector was used as a HPLC chiral stationary phase (CSP) for the resolution of racemic N-acylnaphthylalkylamines. In this study, determination of optical purity was performed by both chiral chromatography and NMR spectroscopy by using the (R)-phenylglycinol derived chiral selector. The data of accuracy and precision of each optical purity value are calculated from the results of NMR and HPLC experiments by comparing with true value. Average error of the NMR method was +2.2% with average RSD of 4.54%, while that of HPLC method was -3.5% with average RSD of 3.23%.
정영한(Young Han Jeong),박은철(Eun Cheol Park),박종연(Chong Yon Park),손명세(Myoung Sei Sohn),이지전(Jee Jeon Yi) 한국병원경영학회 2000 병원경영학회지 Vol.5 No.1
This study is to identify factors affecting public relations(PR) activities through newspapers among hospitals. 53 acute hospitals with more than 500 beds were surveyed by telephone interview, and hospital-related articles on 4 major daily newspapers were searched in KINDS(Korea Intergrated Newspapers Database System). Hospitals` PR scores were evaluated by weighting the direction and the number of hospitals mentioned in an articles. The scores were analysed as the outcome of PR activities by some general characteristics. The mean of PR score was 4.64, most hospitals(22, 41.5%) fell on the group scored more than 0 and less than 5. Hospitals with score under zero were 7(13.2%) and the hospitals scored over 20 point were 3(5.8%). The number of beds and area, two general characteristics of hospitals, had decisive effect on PR activities. Analysis showed hospitals over 1000 beds scored 17.06 point and this group accounted for the highest. Hospitals from 600 to 799 beds scored 2.86, with 800 to 900 beds scored 1.93 and with 500 to 599 beds scored 0.59. Along with area, hospitals in Seoul scored 11.50 point, in Kyong-Ki and Incheon scored 1.50 and in the other areas scored -0.23 point. Department for PR and the number of workers in PR activities made hospitals active in PR. Hospitals with PR department scored 7.05 point, without PR department scored 0.98 Hospitals with workers who is whole responsibility over 5 scored 13.67, from 3 to 4 scored 6.54, from 1 to 2 scored 1.02, and the hospitals without workers who is whole responsibility scored 0.53. Among the characteristics related with PR activities, the assignment of a report in individual hospital had significant effect on the outcome of PR. Hospitals with assigned reporters scored 8.31 point, without them scored 1.89. Finally, the factors affecting PR score were identified by multiple regression analysis. The number of beds and the area(Seoul) were significantly associated with the score in positive direction.
설 상추에 대한 Rhodobacter sp. SA16 처리 효과
이영한 ( Young Han Lee ),정한택 ( Han Taek Jeong ),윤한대 ( Han Dae Yun ) 한국환경농학회 2008 한국환경농학회지 Vol.27 No.2
This experiment was conducted to determine the development of mixed organic fertilizer using photosynthetic bacteria and mass production of mixed microbial compound for the environment -friendly agriculture. Photosynthetic bacteria, Rhodobacter sp. SA16 was isolated from soil collected by plastic film house. The SA16 strain was identified based on 16S rDNA sequence analysis and it is closely related to Rhodobacter sp. (100% similarity). The mixed organic fertilizer using SA16 was made of N-P2O5-K2O=60-10-20 g kg-1 with combined soybean cake, sesame cake, powdered blood, fish meal, powdered bones and red-yellow soil. The mixed organic fertilizer 0.45, 0.90 and 1.35 Mg ha-1 application in Ihyeon series was treated based on soil testing for lettuce cultivation in plastic film house. These results showed that the yield was increased the 18 and 19% over control by the mixed organic fertilizer application 0.45 and 0.90 Mg ha-1, respectively. In the physical properties of the soil, the porosity of mixed organic fertilizer 1.35 Mg ha-1 treatment was highest at 58.8%. Our results clearly revealed that the organic fertilizer using Rhodobacter sp. SA16 and mass production of mixed strains could be a useful technology in pursuing environment-friendly agriculture.
Current Mode Signaling 방법을 이용한 $0.18{\mu}m$ CMOS 3.2-Gb/s 4-PAM Serial Link Receiver
이정준,정지경,범진욱,정영한,Lee, Jeong-Jun,Jeong, Ji-Kyung,Burm, Jin-Wook,Jeong, Young-Han 대한전자공학회 2009 電子工學會論文誌-SD (Semiconductor and devices) Vol.46 No.10
본 논문은 $0.18{\mu}m$ CMOS 공정을 이용하여 3.2 Gb/s serial link receiver를 설계하였다. High-speed links의 performance를 제한하는 가장 큰 요소는 transmission channel bandwidth, timing uncertainty가 있다. 이러한 문제점을 해결하기 위한 방법으로 multi-level signaling(4-PAM)을 이용하였다. 추가적으로 전송속도를 높이고 BER를 낮추기 위한 방법으로 current-mode amplifier, CML sampling latch를 사용하였다. 4-PAM receiver의 최대 데이터 전송속도는 3.2 Gb/s이다. BER은 $1.0{\times}10^{-12}$ 이하이며 chip size는 $0.5\;{\times}\;0.6\;mm^2$이고 1.8 V supply voltage에서 49mA current를 소모한다. The design of a 3.2 Gb/s serial link receiver in $0.18{\mu}m$ CMOS process is presented. The major factors limiting the performance of high-speed links are transmission channel bandwidth, timing uncertainty. The design uses a multi-level signaling(4-PAM) to overcome these problems. Moreover, to increase data bit-rate and lower BER, we designed this circuit by using a current mode amplifier, Current-mode Logic(CML) sampling latches. The 4-PAM receiver achieves 3.2 Gb/s and BER is less than $1.0\;{\times}\;10^{-12}$. The $0.5\;{\times}\;0.6\;mm^2$ chip consumes 49 mA at 3.2 Gb/s from a 1.8-V supply.