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최연석,김동락,이병섭,양형석,정원묵,Choi, Y.S.,Kim, D.L.,Lee, B.S.,Yang, H.S.,Jung, W.M. 한국초전도학회 2008 Progress in superconductivity Vol.10 No.1
A conduction-cooled superconducting magnet system is developed for material separation. The superconducting magnet for material separation has to be designed to have a strong magnetic field in a control volume. Since the magnetic field gradient is larger at the end rather than at the center of the magnet, we developed a design method to optimize the superconducting magnet for material separation. The safety of the superconducting magnet is evaluated, taking into account the electro-magnetic field, heat and structure. The superconducting coil is successfully wound by the wet-winding method. The superconducting coil is installed in a cryostat maintaining high vacuum, and cooled down to approximately 4 K by a two-stage GM cryocooler. The performance of the conduction-cooled superconducting magnet system is discussed with respect to the supplied current, cooling medium and cooling power of a cryocooler.
u-City IT 인프라 구축 가이드라인 1.0의 분석 및 개선 방향 도출
최연석,박병태 한국산업경영시스템학회 2011 한국산업경영시스템학회 학술대회 Vol.2011 No.춘계
In the previous study, the construction guideline of IT infra-structure for a u-City was introduced. However, it is only concentrated on the components and construction procedure for provider-oriented and technology-oriented sensor networks. In this paper, it is described (1) introduction of the construction guideline of IT infra-structure for a u-City, (2) the problems of the previous study, and (3) the enhancement direction of the construction guideline of IT infra-structure for a u-City.
IgG4-Related Disease with lymphadenopathy Presenting as a Cervical lymph node enlargement
최연석,김성민,손장신,황지용,장태수,조도연 고신대학교(의대) 고신대학교 의과대학 학술지 2017 고신대학교 의과대학 학술지 Vol.32 No.2
During the course of evaluation and management of neck masses, consideration for Immunoglobulin G4-related disease (IgG4-RD) should be given. IgG4-RD is relatively a new growing entity of immune-mediated origin, characterized by a mass-forming lesion, the infiltration of IgG4-positive plasma cells and occasionally elevated serum IgG4. The most common manifestations are parotid and lacrimal swelling, lymphadenopathy and autoimmune pancreatitis. A previously healthy 72-year-old man was referred to our clinic with a 2-month history of left cervical lymph node enlargement without systemic manifestations . A cervical lymph node biopsy was planned because of elevated serum IgG4 levels. Pathological findings showed prominent infiltration of IgG4-postive plasma cells in the lymph node. After steroid therapy, a computed tomography scan revealed a decrease in the cervical lymph node size. This case illustrates the importance of including IgG4-RD in the differential diagnosis of a cervical lymph node enlargement.
최연석,김기환,정병호,이경종,김호중,권오정,김진국,이호연,엄상원 대한결핵 및 호흡기학회 2018 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.126 No.-
Objective: To investigate the association between radiologic findings and genomic alterations in patients with surgically resected lung adenocarcinoma. Methods: From 2009 to 2016, patients with surgically resected lung adenocarcinoma who had available results for EGFR mutation, ALK immunohistochemistry (IHC), and KRAS mutation were included in the study. We retrospectively analyzed clinical characteristics, radiologic features and genomic alterations. Results: Of 164 patients, 95 patients were positive for EGFR mutation; 9 patients were positive for ALK IHC; and 11 patients were positive for KRAS mutation. EGFR mutation was associated with younger age, female gender, and never smoker. For radiologic findings, subsolid nodules and positive air-bronchogram sign were associated with positive EGFR mutation. In subgroup analysis of EGFR mutation, L858R point mutation was associated with pleural tagging and air-bronchogram sign, while exon 19 deletion was detected more frequently in younger patients. Positive ALK IHC was associated with solid nodules and advanced stage, while positive air-bronchogram sign was more common in ALK-negative lung adenocarcinoma. In case of KRAS mutation, it was detected more frequently in male gender and patients with smoking history. Conclusion: The radiologic features are associated with genomic alterations in patients with resected lung adenocarcinoma. Solidity, air-bronchogram sign, and pleural tagging of lung nodules could help to predict the genomic alterations of lung adenocarcinoma.