In Beom Lee

Identification of the axial thrust load during the operating conditions of a turbocharger provides useful information to turbocharger designers. The axial force acting on the thrust bearing is mainly caused by the imbalance between the turbine wheel and the compressor wheel. It has a significant influence on the friction losses, which reduce the efficiency and the performance of a high-speed turbocharger. Well-known formulae for calculating the thrust load and the mechanical friction have been g

In this paper, the effect of oil conditions in rotor dynamic behaviors of a FFRB (Fully-Floating Ring Bearing) is investigated. Through the characteristic of a FFRB has two films, it has several advantages such as less friction loss and better stability over a wide speed range. However, it is difficult to supply a oil to the inner film. Thus, turbocharger makers have been paid significant attention to the lubrication of a FFRB because of its importance. This work focuses on the influence of oil

Recently, developments of process monitoring system in order to detect and diagnose process abnormali-ties has got the spotlight in process systems engineering. Normal data obtained from processes provide available infor-mation of process characteristics to be used for modeling, monitoring, and control. Since modern chemical andenvironmental processes have high dimensionality, strong correlation, severe dynamics and nonlinearity, it is not easy toanalyze a process through model-based approach. T

철학자 조요한(1926-2002)은 생전에 『예술철학』(1973) 『아리스토텔레스의 철학』(1988), 『한국미의 조명』(1999), 『예술을 사랑하는 마음』(1993), 『지혜를 사랑 하는 마음』(1993)같은 저작들을 발표했다. 식민지시대에 성장기를 보내고 6·25 한국전쟁을 거치며 그는 난파당한 현실에서 초월을 체득하는 길을 열어준 칼 야스퍼스와 키에르케고르의 실존철학의 영향 속에서 영원을 향하는 소크라테스와 예수 그리스도, 그리스철학과 기독교를 출발점으로 철학하는 길에 접어들어 학사학위청구논문으로 「키에르케고르와 실존」(1954)을 제출하였다. 이어 석사학위청구논문으로 「초기 회랍철학에 있어서의 동방사고의 영향」(1958)을, 박사학위청구논문으로「Aristoteles 철학에 대한 해석상의 문제」(1975를 제출하며 청년기의 관심사였던 그리스철학과 기독교 사이의 ‘대치 점과 상관관계’에 관한 철학적 관심을 심화시켜가고 있다. 그럼에도 불구하고 철학자 조요한은 1973년 『예술철