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박태윤,정재우,장주영,최재철,신종욱,박인원,최병휘,김재열 대한결핵및호흡기학회 2018 Tuberculosis and Respiratory Diseases Vol.81 No.2
Background: Eosinophilia is well recognized in specific conditions. The objective of the present study was to determine clinico-radiologic characteristics of eosinophilia and changes in prevalence over 10 years in recipients of private health screening program at a tertiary hospital in Korea. Methods: Data of private health screening program recipients at the health promotion center of Chung-Ang University Hospital from 2004 to 2013 were collected. Health-related questionnaires and laboratory findings of private health screening program with possible relation with eosinophilia were reviewed. Results of enzyme-linked immunosorbent assay (ELISA) for parasite, chest computed tomography, and pulmonary function test were also reviewed. Results: The cumulative prevalence of eosinophilia was 4.0% (1,963 of 48,928). Prevalence of eosinophilia showed a decreased trend from 2004 to 2013. Most cases (96.6%) had mild degree of eosinophilia. Eosinophilic subjects were older and male-predominant. They showed lower levels of forced expiratory volume in 1 second (FEV1%), forced vital capacity (FVC%), and FEV1/FVC than those without eosinophilia. Eosinophilic subjects showed higher positive rate for common parasite in ELISA than those without eosinophilia. On radiologic findings, consolidation and ground glass opacities were positively associated with the degree of eosinophilia. When eosinophil was classified based on severity, statistically significant correlation between the severity of eosinophil and radiologic abnormalities was found. Conclusion: Eosinophilia is uncommon in healthy population. It usually occurs at a mild degree. Eosinophilic patients have more radiologic abnormalities compared to those without eosinophilia. Such radiologic abnormalities are associated with the severity of eosinophilia.
변형률 속도를 고려한 저온 고속 인장 실험에 관한 연구
박태윤,전상배,전민성,송하철,김광옥,김성찬 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
In this study, high-speed tensile tests in cryogenic environment for SUS304L and Al5083 are performed considering strain rate effect. In order to assess effect of cryogenic environment, high-speed tensile tests in room temperature are also performed for same materials and conditions. From the results, generally fracture strains of SUS304L are larger than those of Al5083 in all conditions. For the SUS304L, fracture strains in the room temperature are larger than those in cryogenic environment. Otherwise, for Al5083, fracture strains in cryogenic environment are larger than those in room temperature. The effect of strain rate is also assessed for each temperatures and materials.
변형률 속도를 고려한 저온 고속 인장 실험에 관한 연구
박태윤,전상배,전민성,송하철,김광옥,김성찬 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5
In this study, high-speed tensile tests in cryogenic environment for SUS304L and AI5083 are performed considering strain rate effect. In order to assess effect of cryogenic environment, high-speed tensile tests in room temperature are also performed for same materials and conditions. From the results, generally fracture strains of SUS304L are larger than those of AI5083 in all conditions. For the SUS304L, fracture strains in the room temperature are larger than those in cryogenic environment. Otherwise, for AI5083, fracture strains in cryogenic environment are larger than those in room temperature. The effect of strain rate is also assessed for each temperatures and materials.