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박문수,김정구 한국멀티미디어학회 2016 멀티미디어학회논문지 Vol.19 No.11
A respiration is one of the most useful techniques for vital checking and an abnormal respiration is often the earliest sign of critical illness. Detection of respiration is based on the photo-plethysmography (PPG) with photodiode technique. Because PPG sensor using photodiode can be easily miniaturized, it is suitable for wearable devices. A system to measure respiration rate based on PPG signal is implemented and for a reliable measurement an improved algorithm in accuracy using PPG signal pattern is proposed in this paper. As results regarding to three types of respirations (regular interval, free interval, and weak respiration) the proposed algorithm showed error rate of 0.047, 0.067, and 0.122 respectively.
기조강연 “통합이론과 영성: 영성에 대한 통전적 접근”과 발제문 “통합적-영성적 사회복지실천의 필요성”에 대한 토론문 / 박문수
박문수 영성과 사회복지학회 2012 영성과 사회복지학회 학술대회 Vol.2012 No.-
우선 두 분의 강연과 발제를 통해 많은 배움을 얻게 되어 큰 영광이고, 노고에 감사를 드린다. 기조강연을 통해서는 동서양은 물론 인문학과 자연과학의 경계를 넘나드는 통합적이고 회통적인 호방함을 느낄 수 있었다. 제1발제에서는 영성사회 복지가 제기되는 맥락, 그 중요성과 사회복지 실천과정에서 발생할 수 있는 제 문 제 등을 폭넓게 이해할 수 있었다. 역시 사람은 평생 배워야 한다는 것을 깨달았다. 논자(論者)는 두 분의 글을 읽으면서 고매한 체계를 이해하는데 적잖이 한계를 느 꼈다. 그리스도교의 테두리에 갇혀 살다보니 새롭게 듣고 보게 된 개념, 인물, 사상 들이 적지 않았던 까닭이다. 당연히 두 논문의 내용을 충분히 이해하지 못하였다. 배움과 이해가 더 필요한 상황이다. 이에 어쭙잖은 이해에 기초하여 두 분의 논고 를 비평하여 논자의 무지를 드러내기보다, 배움이 필요한 부분에 대하여 질문을 드 리는 것으로 소임을 다할까 한다.
퓨로마이신 아미노누클레오사이드 신증에서 사구체 기저막 음이온부위의 초기변화
박문수,고광욱,최용 대한신장학회 1989 Kidney Research and Clinical Practice Vol.8 No.1
Puromycin aminonucleoside (PAN) nephrosis has been studied as an animal model of human minimal change nephrotic syndrome, however its mechanism of proteinuria is not elucidated clearly. Recently it was found that there are certain fixed, negatively-charged structures, I.e. anionic sites, in the glomerular basement membrane and it was proved by physiological experiment that they restrict the filtration of negatively-charged macromolecules like albumin. The changes of GBM anionic sites in PAN nephrosis have been reported by many authors but the results have varied according to the cationic marker used. The foot process fusion, a well-known electron microscopic feature in minimal change nephrotic syndrome, is thought to be related to the loss of sialoprotein in the glomerular epithelial cell surface, but its relation to proteinuria remains unresolved. To find out whether the changes in GBM anionic sites and foot processes are preceding events or secondary phenomenon to proteinuria, the author induced PAN nephrosis in 30 Wistar rats and recorded quantitatively the sequential changes in the GBM anionic sites and the widths of the foot processes. Then these findings were compared with those in 5 control rats. GBM anionic sites were stained with polyethyleneimine (PEI), a cationic marker, in this study. Twenty four hours after administration of PAN, there was a statistically significant decrease in the number of GBM anionic sites compared with the control group (15. 4?1.6 versus 19.5?2.0 per GBM 1,000nm,p$lt;0.05). This change in the number of GBM anionic sites preceded, was directly reflected in, the increase in urinary albumin excretion, which began 36-48 hours after PAN injection. The widening of foot process was observed 72 hours after PAN injection. These findings suggest that GBM anionic sites play an important role as a charge barrier, and that the proteinuria appear as a result of an alteration in this charge barrier. Considering the timing of the foot process fusion, the author believes that it is a secondary phenomenon or an epiphenomenon rather than the cause of proteinuria.