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韓國에서 流行한 인플루엔자 바이러스 , 1968 - 1977
장기봉(張起峰),조양벽(趙양璧),서준석(徐俊錫),백승복(白承福),김경호(金慶浩) 대한바이러스학회 1977 Journal of Bacteriology and Virology Vol.7 No.1
Since 1968, A/Hong Kong/68(H3N2) new pandemic strain of influenza virus type A isolated at Hong Kong, many new antigenic variants of Hong Kong/68 have appeared in most areas of the world. In Korea there were influenza epidemics by it's variants from Febrauary to May in the years '69, '71, '72, '74, '75, '76, and '77 and identificated by means of hemagglutination-inhibition (H-I), neuraminidase-inhibition (N-I), and double immunodiffusion (DID) tests. Also influenza type A and B virus strains were isolated during the epidemic seasons in 1977. The epidemic and isolated virus strains in Korea from 1968 to 1977 were experimented by antigenic analysis. Summarized results were as follows.
Effect of IPMSM d-q Axis Parameters According to Magnetic Saturation and Armature Reaction
장기봉 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.2
FEA was used to analyze inductance and torque of IPMSM. Torque and inductance areanalyzed on the dq-axis. It was shown that Ld and Lq have harmonic components, and magnitude aswell as phase of the harmonics varies according to the current values. This paper shows therelationship between these inductance harmonics and the 6th harmonic component of torque.
컨버터 구동용 전동기 효율 측정을 위한 규격에 관한 연구
장기봉(Ki-Bong Jang) 대한전기학회 2020 전기학회논문지 Vol.69 No.10
Efforts to reduce energy consumption and carbon dioxide emissions continue to be made to cope with growing climate change and environmental problems. To this end, improving the efficiency of the motor has become an important part. Regulations on the efficiency of electric motors around the world continue to increase, and in recent years, the efficiency of the converter-fed electric motor has also been included in the regulation. In Korea, only the efficiency of electric motors operated directly by grid is subject to regulation. However, it is expected that it will gradually expand into a converter-fed motor. In this regard, KSCIEC 60034-2-3 was also established in Korea in 2019 as a standard for measuring the efficiency of converter-fed motor. In this paper, the current status of the international standard related to the efficiency measurement of electric motors and the domestic standard corresponding thereto are reviewed.
단부효과에 의한 PMLSM의 디텐트력 저감을 위한 보조코어 최적설계
장기봉(Jang Ki-Bong),안호진(An Ho-Jin),김규탁(Kim Gyu-Tak) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
There are produced the detent force caused by slot-teeth structures, end-effect and parallel magnetization of permanent magnet in permanent magnet linear synchronous motor. In this paper, we proposed to establish the auxiliary core for reducing detent force which is generated the discontinuity of magnetic circuits by end effect. The optimal design of the auxiliary core used a finite element analysis and design of experiment. To demonstrate the validity of the paper, the experiment results are compared with analysis ones.
미량대사류제시험(微量代謝柳制試驗)에 의(依)한 폴리오바이러스 중화항체측정(中和抗體測定)에 관한 연구(硏究)
장기봉 ( Key Bong Chang ) 대한임상검사과학회 1981 대한임상검사과학회지(KJCLS) Vol.13 No.1
Micro-metabolic inhibition test for the determination of poliovirus neutralizing antibody titeration were tested. The effects of varying in antibody titers both the duration and the temperature of incubation of the virus serum mixtures were examined. Overnight incubation at 4℃ resulted in a 2~4 fold increase in the titer of the hyper immune sera and children sera. This method is simple and economical and appears to be suitable for antibody surveys, particulary sero-epidemiology of polio viruses than C.P.E. observation and test tube tests.
영구자석의 overhang 길이 및 skew 효과를 고려한 LSM 추력함수 도출
장기봉(Jang Ki-Bong),표세호(Pyo Se-Ho),김규탁(Kim Gyu-Tak) 대한전기학회 2009 전기학회논문지 Vol.58 No.6
This paper deals with a polynomial thrust equation of a permanent magnet linear synchronous motor that is considered by a skew and overhang effects of permanent magnet. The skew length, the overhang length, the width and height of permanent magnet, the teeth length and air-gap length which effect to the flux density of air-gap are selected as variables of the polynomial thrust equation. Polynomial thrust equation is elicited by the 6 parameters. The results are satisfied that the values by polynomial thrust equation are compared ones by using 3-dimensional finite element analysis and experiment.
張其鳳 한국서예학회 2016 한국서예학회 학술대회 논문집 Vol.2016 No.1
중국 당대 서예는 1981년 5월에 중국서협이 창립된 이후로 점차 활기를 띠며 번영의 길로 나아갔다. 이 36년간의 여정은 ‘서협(書協)’, ‘전시’, ‘교육’, 이 세 단어로 압축할 수있다. 구체적으로 말하자면 중국 당대 서예는 각종 서협 기구의 창립, 특히 중국서협의 창립을 기점으로 해서, 열렬했던 전시붐이 지표가 되고, 점차적으로 고조되었던 교육열이 지속적 발전의 근거가 되어 부흥의 길을 걸었던 것이다. 그러나 지금은 전시붐은 점차 사그라들고 교육열은 점차 고조되는 방향으로 변화되어 가고 있다.