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정재헌(Chong Chae Hon),김현기(Kim Hyun GEE),최영준(Choi Young Jun),이채수(Lee Chae Soo),하준욱(Ha Joon Wook) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The purpose of this study is to propose the guideline of damage calculation for HRSG(Heat Recovery Steam Generator) components in design step. Cyclic, high temperature and pressure operation of the HRSG creates loading that produce stresses in boiler components that ultimately may produce failures in components. Recently, high operating pressure and temperature are required because of efficiency and also frequent startup/shutdown ate demanded to meet the change of electric power load in HRSG. For this study, operation types that may produce fatigue failure were examined and damage instances that are reported from plant were briefly investigated. In addition, several country's Codes that are suitable for life analysis of HRSG were searched. Sample calculation was performed and approaching method of damage calculation was proposed.
문준호 ( Joon Ho Moon ),서영일 ( Young Il Seo ),김현아 ( Hyun Ah Kim ),홍지현 ( Ji Hyun Hong ),전강 ( Gang Jeon ),하준욱 ( Jun Wook Ha ),이승순 ( Seung Soon Lee ),정재원 ( Jae One Jung ),박충기 ( Choong Kee Park ),박혜림 ( He Lim 대한류마티스학회 2004 대한류마티스학회지 Vol.11 No.4
Scleroderma is rare disease of unknown etiology characterized by fibrosis of skin and internal organs such as lung, gastrointestinal tract, kidney, heart and so on. The association between scleroderma and malignancy has been a controversy during recent years. We report a 77-year old female who had scleroderma and squamous cell carcinoma of esophagus. She was diagnosed as esophageal carcinoma and then sclerotic skin change developed in both hands and feet 3 months later. We present this case with a review of literatures.
국소 방사선 치료에 완전 관해된 구개편도에 발생한 골수외 형질세포종
이정화(Jung Hwa Lee),김기성(Ki Seong Kim),김효정(Hyo Jung Kim),박희철(Hee Chul Park),배훈식(Hoon sik Bae),하준욱(Jun Wook Ha),장대영(Dae Young Zang) 대한두경부종양학회 2005 대한두경부 종양학회지 Vol.21 No.2
골수외 형질세포종은 드문 종양으로 두경부에 주로 발생하며 수술 혹은 방사선의 국소 치료로 완치가 가능한 종양이다. 저자들은 구개편도에 발생 후 국소 방사선 치료로 완전 관해된 골수외 형질세포종 1예를 경험하였기에 보고하는 바이다. Extramedullary plasmacytoma(EMP) is a rare tumor that originates as a clone of malignant transformed plasma cells. EMPs make up 4% of all plasma cell tumors and 90% of EMP cases occur in the head and neck area. The diagnosis of EMP is based on the morphologic and immunophenotypical finding of a localized collection of monoclonal plasma cells in the absence of plasma cell proliferation elsewhere. Patients with EMP can be treated by surgery or radiotherapy alone or in combination. EMP has good prognosis but long-term follow-up is critical because local recurrence or systemic progression to multiple myeloma may develop more than 30 years after the initial diagnosis of EMP. We report a case of EMP in palatine tonsil of 21-year old man who was treated successfully by radiotherapy alone.