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Epidemiology of Hemorrhagic Fever with Renal Syndrome in Korea, 2001-2010
이수한,정병현,이원창,최인수 대한의학회 2013 Journal of Korean medical science Vol.28 No.10
This study describes the epidemiology of hemorrhagic fever with renal syndrome (HFRS) in the past 10 yr (2001-2010) in Korea. During this period, a total of 3,953 HFRS patients and an average prevalence rate of 0.81 per 100,000 population were recorded, with a total of 40 fatal cases, corresponding to a case fatality rate of 1.01%. More HFRS cases were found in men than in women (57% vs 43%), and a higher prevalence rate of HFRS was observed in patients older than 40 yr (82.1%). The highest numbers of HFRS cases were found amongst farmers (35.6%). The majority of HFRS cases (71.3%) occurred in the last quarter of the calendar year (October to December). More HFRS cases occurred in the western part than in the eastern part of Korea (68.9% vs 31.1%). The incidence of HFRS was significantly higher (P<0.001) in rural areas than in urban areas (80.3% vs 19.7%). HFRS still occurs commonly among men, in autumn, and in western rural area of Korea.
망막분지정맥폐쇄에 합병된 황반부종에서 유리체강내 베바시주맙 주입 후 발생한 혈소판감소 1예
이수한,주락현,염정훈,김진형,이도형,이종현,Soo Han Lee,MD,Lock Hyun Ju,MD,Jung Hoon Yum,MD,Jin Hyoung Kim,MD,PhD,Doh Hyung Lee,MD,PhD,Jong Hyun Lee,MD,PhD 대한안과학회 2013 대한안과학회지 Vol.54 No.11
Purpose: To report a rare case of thrombocytopenia after intravitreal bevacizumab injection (IVBI) in a patient with macular edema secondary to branch retinal vein occlusion (BRVO). Case summary: A 52-year-old female presented to our clinic with complaints of visual disturbance in her right eye for 2 months. She was receiving hemodialysis therapy 3 times a week for 4 years due to chronic renal failure. Unilateral macular edema secondary to BRVO was observed on fundus examination and was confirmed with optical coherence tomography (OCT). The first IVBI was performed, and an additional injection was given 4 weeks later. Four weeks after the second injection, thrombocytopenia was present. The patient was followed up in our clinic without IVBI for 8 weeks and the platelet count recovered. Thrombocytopenia was reconfirmed after 2 additional monthly injections. After she revisited our clinic without IVBI for 8 weeks, the platelet count recovered without any treatment. Conclusions: When a patient presents with thrombocytopenia after IVBI with macular edema in BRVO, thrombocytopenia due to IVBI should be considered as a possible diagnosis. J Korean Ophthalmol Soc 2013;54(11):1788-1793
알칼라인 수전해용 Raney Ni-Zn-Fe 전극의 도금 변수에 따른 산소발생반응 특성
이수한,김종원,배기광,박주식,정성욱,정광진,김영호,강경수 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
알칼라인 수전해는 낮은 전류밀도에서 작동할 수 있고 대형화가 용이하여 신재생에너지와 연계할 수 있는 수전해로 각광받고 있다. 물의 전기분해를 위해서는 반응의 활성화 에너지를 초과하는 전압을 필요하다. 전극 소재에 따라 이론 전압보다 높은 과전압이 발생하기 때문에 효율적인 수소 생산을 위해서는 과전압이 낮은 전극을 제조하는 것이 필수적이다. 본 연구에서는 과전압이 낮은 전극을 제조하기 위하여 도금욕의 Fe 함량과 도금 시 전류 밀도를 변화시켰다. 표면적이 넓은 Nickel Foam을 지지체로 사용하였으며 Watt’s bath를 기반으로 전극을 제조하였다. 전극의 특성을 확인하기 위하여 물리화학적, 전기화학적 분석을 수행하였다. 도금욕의 Ni:Fe 함량을 여러가지 비율로 살펴본 결과, 전극의 Fe 함량이 증가함에 따라 전극의 과전압이 전체적으로 감소하는 것을 확인할 수 있었다.
이수한,배춘식,정병현 한국임상수의학회 2003 한국임상수의학회지 Vol.20 No.3
We found seventeen dairy cattle with the abnormal signs in cardiovascular and gastrointestinal systems after feeding of the yew foilage. Among them three cattle were dead due to yew poisoning. Among the remaining fourteen dairy cattle, four cattle showed similar symptoms as did dead cattle. Although the remaining ten dairy cattle did not show any abnormal signs, we conducted a therapy of forced magnesium sulfate infusion because the yew consumption might have been occurred in all cattle. As a result of the therapy, we could not found further signs of yew poisoning. The performance of the therapy and the treatment procedures adapted by the therapy could be concluded as follows: The cardioselective toxicity and inhibition of peristaltic activity by the taxine in yew foilage might be involved in the symptoms of acute poisoning as anorexia, dullness, muscle tremor, dyspnea, and sudden death. We also performed the dose response relationship of taxine to the range of clinical symptoms and examined recovery performances. Through the autopsy of the cattle, we could confirm the presence of yew foilages that might have caused the poisoning in the gastrointestinal tract. However, we could not identify further abnormalities in other organs. In this case report, we demonstrated that practice of the forced magnesium sulfate infusion in yew poisoning was helpful for the attenuating the taxine poisoning by blocking the further proceeding of the toxic effect.
A Comprehensive Review of Smart City Studies focusing on Research Fields, Purpose, and Methods
이수한,유석형 한국인터넷전자상거래학회 2019 인터넷전자상거래연구 Vol.19 No.2
This study is attempted to identify the trends of smart city studies in various disciplines by conducting meta-analysis. Data collection was used research information sharing service which is the largest academic research information service in Korea and the analysis focused on the academic background, research purpose, and methods of smart city studies. The results of this study are as follows. First of all, the ‘Society’ was the most studied field of smart city studies and followed by ‘Human Science and Technology’, ‘Artifact’ and ‘Human’. These results show that smart city is widely accepted in the fields of science technology, humanities and social sciences, and most of the studies are integrating various academic fields. Next, it could be confirmed that the purpose of smart city research was mostly for practical purpose and various methodological approaches have not yet been attempted in terms of research methodology. These results can be interpreted as the fact that the smart city of Korea is performed by the government or local government and smart city research is still in its early stage. Finally, limitations and future direction of research were discussed.