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응급의료센터에 내원한 심부전 환자의 예후 예측인자로서 Nuertrophil Gelatinase-Associated Lipocalin의 유용성
강대화,김상일,박준범,정혜진,이영주,박수연,조영신 대한응급의학회 2016 大韓應急醫學會誌 Vol.27 No.5
Purpose: We aimed to investigate the clinical use of plasma neutrophil gelatinase-associated lipocalin (NGAL) in the emergency department (ED), especially for predicting the prognosis of heart failure. Methods: In a retrospective study, patient selection was based on those who visited the ED between January 2015 and September 2015 and were diagnosed with heart failure and underwent laboratory tests, including B-type natriuretic peptide (BNP) and NGAL. They were divided in two groups, according to the presence or absence of the following events: one or more intubations, admission of intensive care unit (ICU), coronary angiography, renal replacement therapy, extracorporeal membrane oxygenation, intra-aortic balloon pumping, cardiopulmonary resuscitation (CPR), or death. Results: We studied 63 patients with heart failure. The absence group consisted of 29 subjects, and the presence group consisted of 34 subjects. Patients who were younger, had a history of diabetes mellitus, had high level of serum creatinine, low estimated glomerular filtration (eGFR), high creatine kinase (CK) or high NGAL were associated with higher incidence of events and were statistically significant (p<0.001, 0.02, 0.005, 0.035, 0.03, 0.003). In the case of BNP, the presence group showed a higher value compared with the absence group, but was not statistically significant. In a multivariated logistic regression, age (OR=0.868, 95% confidence interval 0.788-0.956, p=0.004) and NGAL (OR=1.004, 95%CI 1.001-1.007, p=0.021) were considered as meaningful factors for predicting the event. Conclusion: NGAL elevation in this study showed to be a meaningful factor, indicating a prognosis to those patients who visited the ED and were diagnosed as heart failure.
광섬유 센서를 이용한 50,000원 지폐 위조 판별에 관한 연구
강대화(Dae-Hwa Kang),홍준희(Jun-Hee Hong) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.1
The authenticity of bank note is threatened by increasing a counterfeit note with development of the information industry, recently. The importance of counterfeit discrimination is stressed, but there is a limits to popularization. Because usually, the existing counterfeit discriminator uses invisible ray zone like UV, IR, etc. The purpose of this paper is the construction of counterfeit discrimination system for ₩50,000 bills. This system is used optical fiber sensor with excellent confidence as well as easy way of using in wave length of a visible ray zone. The light was altered by lightening optical fiber sensor to particular part of bank notes in order displacing response of optical fiber sensor. The experiment was processed with data of 100 bank notes on manufacture optical fiber, probe, jig. As a result, the discrimination conuterfeit was verified when the experiment was processing with hologram or CSI on the bank notes with three kinds of color printer.
강대화(Dae-Hwa Kang),홍준희(Jun-Hee Hong),곽양양(Yang-Yang Guo),이혁원(Hyok-Won Lee) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.4
In this study, we developed a counting method for non-contact ID cards using an optical fiber displacement sensor instead of the traditionally used friction counting method. The proposed method has the advantage of high speed and automated measurement. For counting non-contact ID cards, an H-type optical fiber sensor, jig part, and counting program are developed separately to build the system and adjust it. Through the experimental test results, it was confirmed that counting is possible with one type of international ID card and one type of financial security cardbased on ISO7810. Furthermore, by applying the proposed method to 100 ID cards 100 times repeatedly, it was confirmed that it has high accuracy and an error ratio of 0%. We experimentally demonstrated that the proposed counting method for non-contact ID cards using an optical fiber displacement sensor can perform measurements with high accuracy and high speed.