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만성폐쇄성폐질환을 동반한 탄광부진폐증자의 혈청 중 LD 및 CRP 농도
이종성,신재훈,이유림,백진이,최병순,Lee, Jong Seong,Shin, Jae Hoon,Lee, YouLim,Baek, JinEe,Choi, Byung-Soon 대한임상검사과학회 2017 대한임상검사과학회지(KJCLS) Vol.49 No.3
Coal workers' pneumoconiosis (CWP) and chronic obstructive pulmonary disease (COPD) are characterized as chronic inflammation of the lung in miners exposed to coal mine dust. The aim of the present study was to compare the levels of serum lactate dehydrogenase (LD) and C-reactive protein (CRP) as the inflammatory indices between subjects with CWP and those with CWP and COPD (CWP+COPD), among a total of 97 subjects (27 control, 40 CWP, and 30 CWP+COPD patients). The mean levels of serum LD (165.7 vs 184.6 U/L, p=0.016) and CRP (0.08 vs 0.15 mg/dL, p=0.002) in subjects with CWP were higher than those of in subjects without CWP. The mean level of serum CRP (0.10 vs 0.19 mg/dL, p=0.008) in subjects with COPD was higher than that in subjects without COPD. In an analysis of covariance adjusted by age, the mean level of serum CRP showed statistical significance among the study groups, control, CWP, and CWP+COPD (0.07 vs 0.13 vs 0.19 mg/dL, p=0.005); the mean level of serum CRP in the CWP+COPD group was significantly higher than that of the control group (p=0.001). The results suggest that a high level of CRP in the serum may be associated with CWP and COPD in retired coal miners.
選別形 多回 샘플링 檢査의 AOQ 및 ATI 檢査過誤의 영향
Jong Seong Lee(李種盛) 강원대학교 산업기술연구소 1983 産業技術硏究 Vol.3 No.-
This paper develops and provides formulas for calculating the Average Outgoing Quality and the Average Total Inspection for nine different sample/rest-of-lot disposition policies in which rectifying mulitple sampling inspection by attribute can be carried out. The formulas are considered for perfect inspection as well as error-prone inspection.
이종성(Jong Seong Lee),강부병(Bu Byoung Kang),이희성(Hi Sung Lee) 한국트라이볼로지학회 2013 한국윤활학회지(윤활학회지) Vol.29 No.2
Cu-matrix-sintered brake pads and heat-resistant low-alloy steel are commonly applied to basic brake systems in high-energy moving machines. We analyzed how the tribological characteristics are influenced by the inertial mass. A high inertial mass decreased the friction coefficient by about 15% compared to a low inertial mass under all velocity conditions. The wear rates of the friction materials increased with the inertial mass. Thus, the inertial mass influences the friction coefficient and wear rate of the friction materials and disk but not the friction stability.