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강판보강 콘크리트충전 각형강관 기둥 - H형강보 접합부의 거동
이덕현(Duk Hyun Lee),유영찬(Yeong Chan Yoo),신경재(Kyung Jae Shin),오영석(Young Suk Oh),이승준(Seung Joon Lee),문태섭(Tae Sup Moon) 한국강구조학회 1997 韓國鋼構造學會誌 Vol.9 No.3
The objective of this study is to investigate the structural behavior of Concrete-Filled Steel Tubular Column-H Beam connections with plate stiffeners. The first, we made experiment on the Column to H-beam flange connections stiffened with simple tensile loading. The parameters of tensile experiment are the area of each plates. The simple tensile experiment is conducted to 5 kinds of specimens. Eestimating the load, displacement, and strain from each kind, we compared them with results of second experiment. The second, we made experiment on the Column to H-beam connections stiffened with the sames under monotonic and cyclic load. we made specimens of 5 for the second experiment. In analysis. comparing each strengthes and stiffnesses we estimated deformation capacity, comparing and estimating each yielding strength ratios and maximum-strength ratios on the basis of Yield line theory, we suggested new Strength Formula of Beam-to-Column Connections.
박덕근,이덕현,Park, Duck-Gun,Babu, M.K.,Lee, Duk-Hyun 한국압력기기공학회 2014 한국압력기기공학회 논문집 Vol.10 No.1
Local wall thinning is a point of concern in almost all steel structures such as pipe lines covered with a thermal insulator made up of materials with low thermal conductivity(fiberglass or mineral wool); hence, Non Destructive Technique(NDT) methods that are capable of detecting the wall thinning and defects without removing the insulation are necessary. In this study we developed a Pulsed Eddy Current(PEC) system to detect the wall thinning of Ferro magnetic steel pipes covered with fiber glass thermal insulator and shielded with Aluminum plate. The developed system is capable of detecting the wall thickness change through an insulation of thickness 10cm and 0.4mm aluminum shielding. In order to confirm the thickness change due to wall thinning, two different sensors, a hall sensor and coil sensor were used as a detecting element. In both cases, the results show a very good change corresponding to the thickness change of the test specimen. During these experiments a carbon steel tube of diameter 210mm and a length of 620mm, which is covered with insulator of 95mm thickness was used. To simulate the wall thinning, the thickness of the tube is changed for a specified length such as 2.5mm, 5mm and 8 mm from the inner surface of the tube. A 0.4mm thick Aluminum plate was covered on the Test specimen to simulate the shielding of the insulated pipelines. For both hall sensor and coil detection methods Fast Fourier transform(FFT) was calculated using window approach and the results for the test specimen without Aluminum shielding were summarized which shows a clear identification of thickness change in the test specimen by comparing the magnitude spectra. The PEC system can detect the wall thinning under the 95 mm thickness insulation and 0.4 mm Al shielding, and the output signal showed linear relation with tube wall thickness.
증 례 : 최소변화콩팥병증이 동반된 골수형성이상증후군 환자에서 스테로이드 치료
이상아 ( Sang Ah Lee ),임장환 ( Jang Hwan Lim ),장지훈 ( Ji Hun Jang ),장순희 ( Soon Hee Chang ),곽은경 ( Eun Kyoung Kwak ),이덕현 ( Duk Hyun Lee ),이선아 ( Sun Ah Lee ) 대한내과학회 2016 대한내과학회지 Vol.90 No.1
본 증례는 신증후군과 범혈구감소증이 있는 환자에서 골수형성이상증후군과 최소변화콩팥병증이 동시에 진단된 경우이다. 최소변화콩팥병증은 골수형성이상증후군에 동반된 방종양성 사구체신염으로 생각되며 면역억제제인 프레드니 솔론을 투여하면서 단백뇨의 호전 및 혈액, 골수 소견의 호전을 보인 것으로 보아 발병기전에서 면역체계의 이상이 중요하였음을 알 수 있다. 골수형성이상증후군 특히 모세포증가 불응빈혈-2에서 최소변화콩팥병증의 발생은 국내외에서 처음 보고하는 바이다. Glomerulonephritis associated with malignancy is deemed to be paraneoplastic glomerulonephritis. Myelodysplastic syndrome (MDS) is a group of heterogeneous clonal hematopoietic stem cell disorders characterized by impaired hematopoietic cell differentiation and cytopenia. The pathophysiology of MDS is thought to be immune-mediated in part. A few reports have documented various forms of glomerulonephritis in patients with MDS and suggested that immune dysregulation is important in the development of paraneoplastic glomerulonephritis. Here, we report a patient with MDS and refractory anemia with excess blast-2 accompanied by minimal change nephrotic syndrome. The patient was treated with prednisolone, and the nephrotic-range proteinuria and pancytopenia improved markedly. (Korean J Med 2016;90:63-67)
독시라민 과다복용에 의한 횡문근 용해 및 급성 신부전 2례
정재권,김성호,김인식,김선웅,주동욱,이덕현,김종근,Jung Jae Kwon,Kim Sung Ho,Kim In Seek,Kim Seon Woong,Ju Dong Wook,Lee Duk Hyun,Kim Jong Kun 대한임상독성학회 2004 대한임상독성학회지 Vol.2 No.1
Doxylamine succinate is an antihistamine used primarily as a sleep-induction. It can be gotten without a doctor's prescription in Korea, so it' s overdoses were frequently encountered. There were several reports that the overdoses of doxylamine might cause rhabdomyolysis, but few cases have been reported that it is related to acute renal failure (ARF). In cases that ARF occur, most of them are not severe enough to require hemodialysis. We experienced two cases of severe rhabdomyolysis complicating ARF after doxylamine overdose and treated with hemodialysis. Clinicians should be aware of the potentially lethal complications of rhabdomyolysis in patients who ingest doxylamine succinate and the needs for prompt intervention and careful assessment of renal function.