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이중구조형 z-슬롯 안테나의 슬롯 형상에 따른 방사패턴 분석
강광원(Gwang-Won Kang),박종안(Jong-An Park),강성관(Sung-Kwan Kang),천종훈(Jong-Hun Chun),안영은(Young-Eun An) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.9
In this paper, the dual-structure z-slot antenna with radiation pattern according to the shape of slot for UHF RFID Reader was analyzed. In order to analyze characteristics of the dual-structure z-slot antenna, the 12 slots on the radiation plate were shaped under different parameter conditions with diagonal length (L), line length (d), the slot gap (t). The designed antenna and the standard antenna were rotated in the horizontal and vertical directions respectively and then the isotropic pattern was measured by 48 kinds of experimental methods and we have obtained the antenna prameter with optimal isotropic pattern characteristics. It was showed to improve the efficiency of the antenna, as well as to improve the miniaturization of antenna size and the receive sensitivity as a range of the tag through characterization analysis of the dual-structure z-slot antenna for UHF RFID Reader with optimal isotropic pattern.
이관석(Kwan Suk Lee),임현교(Hyeon Kyo Lim),장성록(Seong Rok Chang),이광원(Kwang Won Rhie),김유창(Yu Chang Kim) 대한인간공학회 2006 대한인간공학회 학술대회논문집 Vol.- No.-
Though a lot of industrial accidents resulted from human errors, conventional researches on human errors concerned on their own research objectives so that they were not applicable directly to industrial fields which require derivation of countermeasures as well as causal factors of human errors. To assist industrial workers who look for a comprehensive model which can explain true causes of human errors in order to prevent industrial accidents, this research aimed to develop a new integrative analysis model by synthesizing conventional models and to validate it with some industrial accident cases.
산업현장의 휴먼에러 예방을 위한 통합적 분석모델의 개발
이관석(Kwan Suk Lee),임현교(Hyeon Kyo Lim),장성록(Seong Rok Chang),이광원(Kwang?Won Rhie),김유창(Yu?Chang Kim) 대한인간공학회 2008 大韓人間工學會誌 Vol.27 No.1
A lot of models have been developed for prevention of human errors. Nevertheless most of them failed to attract attention of industry which has been looking for an integrative model that can show practical countermeasures as well as causal factors of human errors. This research aimed to develop a comprehensive model that can mainly be applied to industrial fields. Therefore, in the model, it was tried to explain sequences of an operator's information process that might cause human errors on one hand, and life cycle stages of facilities involved when human errors occur on the other hand. This model was validated by using a typical accident case. With the comprehensive model presented in this research, one could follow up the sequence of human errors caused by operators, and errors made at the design stage which might cause accidents could be tracked. As a consequence, it is expected that much attention would be paid to preventing human errors in industrial fields since safety personnel can easily find out cause of human errors throughout life cycle stages of man-machine facilities if utilizing the suggested model.
결핵성 및 비결핵성 흉막삼출액에서 TNF-$\alpha$ 농도의 진단적 의의
나현주,박석채,강광원,박형관,김영철,최인선,박경옥,Na, Hyun-Joo,Park, Seog-Chea,Kang, Kwang-Won,Park, Hyeong-Kwan,Kim, Young-Chul,Choi, In-Seon,Park, Kyung-Ok 대한결핵및호흡기학회 1997 Tuberculosis and Respiratory Diseases Vol.44 No.3
연구배경 : 결핵성 흉막염의 감별 진단 목적으로 널리 이용되고 있는 검사는 adenosine deaminase와 INF-$\gamma$를 세포성 면역에 또다른 중요한 매개체로 알려진 TNF-$\alpha$의 진단적 의의를 조사하고, 현재 임상에서 유용한 지표로 사용되고 있는 adenosine deaminase와의 감별력을 비교하고자 본 연구를 시행하였다. 방 법 : 삼출성 흉막염 80예(결핵성 : 39예, 암성 : 31예, 부폐렴흉막염 : 10예)를 대상으로 흉수의 기본적인 세포조성, 화학 검사와 더불어 ADA와 TNF-$\alpha$(Medgenix IRMA kit)를 측정하였다. 결 과 : 흉수내 ADA농도는 결핵성 흉막염에서 $48.7{\pm}32.7U/L$로 비결핵성 흉막염 $26.0{\pm}41.3U/L$에 비해 유의한 차이로 높았고(p < 0.05), TNF-$\alpha$치 또한 결핵성 흉막염에서 $184.1{\pm}214.2pg/mL$로 비결핵성 흉막삼출액 $44.1{\pm}114.2pg/mL$에 비해 유의하게 높았다(p < 0.01). ROC 곡선을 이용하여 ADA와 TNF-$\alpha$의 감별력을 가장 높일 수 있는 기준치를 정하였을 때, ADA는 30U/ml, TNF-$\alpha$는 15pg/ml로 측정되었고, 각각의 기준치를 이용하여 감수성과 특이도를 구하였을때, ADA는 감수성 66.7%, 특이도 85.0%, TNF-$\alpha$는 감수성 69.2% 특이도 87.1%를 보였다. 두 검사의 민감도와 특이도를 비교하기 위한 ROC 곡선에서, ROC 곡선아래의 면적(area under curve)은 ADA와 TNF-$\alpha$사이에 유의한 차이가 없었다(ADA 0.83, TNF-$\alpha$ 0.82). 다중회귀분석(multiple stepwise regression)에서 ADA가 가장 유용한 지표로 계산되었으나 TNF-$\alpha$의 추가가 분별력에 더 이상의 기여함은 없었다. 결 론 : 결핵성 흉막염과 비결핵성 흉막염을 감별 진단하는데 ADA와 함께 TNF-$\alpha$도 유용한 지표로 이용될 수 있으나 두가지 검사를 함께 시행함에 따른 진단에 있어서의 잇점은 없었다. Objectives : The differentiation of tuberculous effusion from the other causes of exudative pleural effusion remained difficult even with aids of biochemical analyses and pleural biopsy. As the pathophysiology of tuberculous pleural effusion is an enhanced cell mediated immunity, Adenosine deaminase(ADA) and various eytokines including Inteferon-$\gamma$, tumor necrosis factor alpha(TNF-$\alpha$) are considered as useful diagnostic tools in differentiating exudative pleural effusion. The author would like to demonstrate the diagnostic usefulness of TNF-$\alpha$ in the differentiation of exudative pleural effusion, and compared the discriminating ability of TNF-$\alpha$ with ADA. Methods : Pleural fluids obtained from 80 patients (tuberculous : 39, malignant : 31, parapneumonic : 10) with exudate pleural effusions were processed for cell counts and biochemical analysis including ADA and TNF-$\alpha$. Results : Tuberculous pleural fluid showed higher levels of ADA and TNF-$\alpha$, $48.7{\pm}32.7U/L$ and $184.1{\pm}214.2pg/mL$ than that of non-tuberculous effusion $26.0{\pm}41.3U/L$ and $44.1{\pm}114.2pg/mL$, respectively (ADA, TNF-$\alpha$, p < 0.05, p < 0.01). Receiver operating characteristics(ROC) curves were generated for ADA and TNF-$\alpha$ and the best cut-off value for adenosine deaminase and TNF-$\alpha$were considered as 30U/L and 15pg/ml, respectively. Comparing the area under the ROC curves, there was no significant difference between ADA and TNF-$\alpha$. Conclusion : For the differential diagnosis of tuberculous pleural effusion from the other causes of exudative pleural effusions, TNF-$\alpha$ as well as ADA was considered as useful diagnostic method. However adding TNF-$\alpha$ to ADA has no further diagnotic benefit than ADA alone.
오가피로부터 Acanthoside D의 분리 및 함량분석
홍성수,황지상,이선아,황방연,하광원,제금련,성낙선,노재섭,이경순,Hong, Sung-Su,Hwang, Ji-Sang,Lee, Seon-A,Hwang, Bang-Yeon,Ha, Kwan-Won,Ze, Keum-Ryon,Seung, Rack-Seun,Ro, Jai-Seup,Lee, Kyong-Soon 한국생약학회 2001 생약학회지 Vol.32 No.4
The Acanthopanax genus belonging to the Araliaceae family is widely used as a traditional medicine having tonic and sedative effects. For the quality control of Acanthopanacis Cortex, lignan compound, acanthoside D, was isolated from the MeOH extract of Acanthopanax sessiliforum Seeman. (Araliaceae) and identified by the spectroscopic analysis. A quantitative analysis of acanthoside D using HPLC method showed that the average contents were $0.081{\pm}0.058%$ in 39 samples collected throughout the regions of Korea.
홍성수,황지상,이선아,황방연,하광원,제금련,성낙선,노재섭,이경순,Hong, Sung-Su,Hwang, Ji-Sang,Lee, Seon-A,Hwang, Bang-Yeon,Ha, Kwan-Won,Ze, Keum-Ryon,Seung, Rack-Seun,Ro, Jai-Seup,Lee, Kyong-Soon 한국생약학회 2001 생약학회지 Vol.32 No.4
For the quality control of Leonuri Herba, alkaloid compound, leonurine, was isolated from the MeOH extract of Leonurus sibiricus L. (Labiatae) and identified by the spectroscopic analysis. A quantitative analysis of leonurine using HPLC method showed that the average contents were $0.124{\pm}0.065%$ in 34 samples collected throughout the regions of Korea.