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수도용 강관의 용접성에 관한 연구(제2보) : 용접부의 잔류응력 해석 Analysis for residual stress of the weldments
이영호,이규천,나석주 충남대학교 공업교육연구소 1995 論文集 Vol.18 No.1
In this study, the analysis of residual stresses of the weldments were carried out to evaluate the safety of the steel welded pipes using a finite element method for the butt-weld joint and the lap-weld joint. On the other hand, to compare the analytic results with actual ones, the residual stresses were measured experimentally. The main conclusions can be summarized as follows ; 1. It was appeared that the tensile residual stresses were distributed in the weldment and the maximum tensile strength was about 50 ㎏f/㎟ which was the same level of the yielding strength in base metal. 2. In case of the butt-welded joint, the value of tensile strength decreased with increasing the distance from the weld metal or fusion line. On the othe hand, it was appeared that the compressive strength exsisted in the weld-bead. 3. The measurement value of maximum residual stress in the welding direction was 9.2㎏f/㎟ and was much lower than that of the theoretical analysis.
기관내 관 제거 후 발생한 급성 호흡부전에서 비침습적 양압 환기법의 유용성
나주옥 ( Joo Ock Na ),임채만 ( Chae Man Lim ),심태선 ( Tae Sun Shim ),박주헌 ( Joo Hun Park ),이기만 ( Ki Man Lee ),이상도 ( Sang Do Lee ),김우성 ( Woo Sung Kim ),김동순 ( Dong Soon Kim ),김원동 ( Won Dong Kim ),고윤석 ( Youn Suck 대한결핵 및 호흡기학회 1999 Tuberculosis and Respiratory Diseases Vol.46 No.3
( Na Young Kim ),( Dong Seok Shin ),( Young Wook Ko ),( Dong Uk Cheon ),( Won Seon Koh ),( Jeong Eun Kim ),( Young Suck Ro ),( Joo Yeon Ko ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2
Background: Herpes simplex virus (HSV) type 1 is main cause of orofacial infection, whereas HSV-2 is usually associated with genital infection. HSV-2 tends to have more frequent recurrence and severe symptoms compared to HSV-1. Recent studies reported the incidence of HSV-1 infection has been increasing up to about 50% in genital area in United States. Objectives: The aim of this study was to estimate the proportion of HSV-1 and HSV-2 according to various factors such as infection site, age, sex, and underlying disease in Korea. Methods: We performed a retrospective study of 220 Korean patients diagnosed as recurrent HSV infections by HSV PCR skin testing from 2016 to 2018. The prevalence of infection with HSV-1 and HSV-2 were compared according to the site, sex and age. Results: Of the 220 participants, 124 became infected with HSV-1 and 96 with HSV-2. HSV-1 was main cause of orofacial herpes (95.97%, p<0.001) and HSV-2 showed 88.54% of genital herpes. Female was more prevalent in both HSV-1 and HSV-2 infections than male, however HSV-2 infection showed significant female dominance (p<0.02). Significant increasing trends of HSV-2 infections by age in comparison with HSV-1 have been revealed (P=0.005). Conclusion: HSV-2 was still major cause of genital herpes in this study. Further large-scale Korean epidemiologic studies are needed because the recurrence of HSV infection has negative effect on patients’ quality of life.
Foreign Body Granuloma Following Hwangryunhaedok-tang Pharmacopuncture for Postherpetic Neuralgia
( Na Young Kim ),( Hae Chang Joh ),( Jeong Eun Kim ),( Young Suck Ro ),( Joo Yeon Ko ) 대한피부과학회 2023 Annals of Dermatology Vol.35 No.7
Foreign body granuloma can be caused by endogenous compounds as well as various injectable materials. In oriental medicine, pharmacopuncture combining herbal medicine administration and injection is one of the commonly used procedures. Hwangryunhaedoktang (HHT, a.k.a., Huang-Lian-Jie-Du-Tang in China), an oriental medicinal herb known to produce anti-inflammatory effects, has been recently made in pharmacopuncture products and commonly used for various disorders. An 88-year-old female presented with multiple tender nodules on the left parietal scalp and forehead. The diagnosis of foreign body granuloma caused by HHT pharmacopuncture was revealed by more detailed previous treatment history of postherpetic neuralgia and histopathologic examination. Herein, we report a foreign body granuloma as a delayed adverse reaction caused by non-standard administration of herbal extracts, considered biologically inert.
Pilomatricoma on the Sole Following Wart Treatment
( Na Young Kim ),( You Jin Jung ),( Ki Yeon Kim ),( Joo Yeon Ko ),( Young Suck Ro ),( Jeong Eun Kim ) 대한피부과학회 2023 Annals of Dermatology Vol.35 No.7
Pilomatricoma is a benign skin tumor that arises from hair follicle stem cells. It typically presents in the facial region and rarely involves the palms and soles. A 15-year-old boy presented with a solitary tender nodule on the left sole. He had a history of plantar warts on the same site and had received multiple treatments including cryotherapy and intralesional bleomycin injection for nine months. Excisional biopsy was performed, and the specimen showed a well-demarcated mass in the deep dermis with basaloid cells undergoing abrupt keratinization. Ghost cells were seen with calcification. Based on these findings, he was diagnosed with pilomatricoma on the sole. We report a case of pilomatricoma, which developed on a site without hair follicles.