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양성 및 음성 정신분열병 환자에서 Haloperidol 혈중농도와 임상호전도
정청,박영남,최영태 대한신경정신의학회 1994 신경정신의학 Vol.33 No.3
The authors studied the correlation between serum haloperidol levels and clinical response under a fixed dose haloperidol treatment(15mg/day) in 29 hospiatlized DSM-III-R schizophrenics, 15 positive subtype and 14 negative subtype by Positive and Negative Syndrome Scale(PANSS). Serum haloperidol levels were measured by High Performance Liquid Chromatography(HPLC) on the 7th and 28th day of treatment, and positive and negative symptom scores were rated using PANSS on the baseline, 7th day and 28th day of treatment. Serum haloperidol levels on the 7th day of treatment were 10.1±55ng/ml in positive schizophrenics and 7.6±6.2ng/ml in negative schizophrenics. On the 28th day serum haloperidol levels were 10.0±5.3ng/ml in positive schizophrenics and 9.1±6.3ng/ml in negative schizophrenics. There were no significant difference in the serum haloperidol levels between positive schizophrenics and negative schizophrenics on both occasions. In positive schizophrenic subtype, positive symptom scores improved 26.7±19.2% and negative symptom scores improved 23.4±13.1% on the 7th day of haloperidol treatment in comparison with baseline score, and 44.6±21.8% and 33.6±17.3% respectively on the 28th day. In negative schizophrenic subtype, positive symptom scores improved 9.4±10.2% and negative symptom scores improved 16.1±16.5% on the 7th day of haloperidol treatment in comparison with baseline score, and 18.0±20.3% and 25.4±14.8% respectively on the 28th day. There was cuvilinear relationship between serum haloperidol levels and positive symptom improvement rate in positive schizophrenic subtype, and serum haloperidol therapeutic range(defined by the median score of improvement) was estimated between 7.9-21.4ng/ml. There were no significant relationship between serum haloperidol levels and PANSS negative symptom improvement rate in both positive and negative schizophrenic subtypes.
박인환(I.H.Park),최영태(Y.T.Choi),전영식(Y.S.Jeon),최승복(S.B.Choi),정재천(C.C.Cheong) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
This paper presents the performance investigation of an engine mount featuring an ER (Electro-Rheological) fluid. The Bingham properties of the ER fluid to be employed to the ER engine mount are experimentally obtained through Couette type viscometer. The governing equation of motion of the ER engine mount is derived using equivalent hydraulic model. The ER engine mount is then designed and manufactured on the basis of parameter studies. The electric field-dependent transmissibility of the ER engine mount is evaluated by changing the particle concentration of the ER fluid.<br/>
김희준(H.J.Kim),최영태(Y.T.Choi),최승복(S.B.Choi),정재천(C.C.Cheong) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
This paper presents performance analysis of an ER (electro-rheological) engine mount. A shear-mode type ER engine mount is devised and its equation of motion is derived from a bond graph method. Subsequently, a full-car model which is installed with ER engine mounts is established, followed by the construction of the governing equations of motion. Field-dependent vibration isolations of the full-car system are analyzed by considering excitation forces of the engine.<br/>
Monte-Carlo 모의실험을 통한 부분 인구집단별 벤젠 및 PM 10 의노출 및 위해성 평가
박진현(Jinhyeon Park),양소영(So Young Yang):박윤경(Yunkyung Park),류현수(Hyeonsu Ryu),김은채(Eunchae Kim),최영태(Youngtae Choe),허 정(Jung Heo),조만수(Mansu Cho),양원호(Wonho Yang) 한국환경보건학회 2019 한국환경보건학회지 Vol.45 No.3
Objectives: The Korea Ministry of Environment regulates concentrations of hazardous air pollutants (HAPs) through Atmosphere Environmental Standards to protect public health from HAPs. However, simply determining the exceedance of HAP concentrations has several limitations and more comprehensive assessment is required. In addition, integrated risk assessment is needed considering exposure in all microenvironments, including outdoor as well as indoor environments. The purpose of this study was to assess the differences in risk by sub-population groups according to time-activity patterns and reported concentrations, as well as the lifetime risk for Koreans. Methods: In this study, we calculated time-weighted average exposure concentrations for benzene and PM 10 among preschool-age children, students, housewifes, workers, and the elderly using residential time and concentrations for indoor (house, school or workplace, other), outdoor, and transport by the meta-analysis method. The risk assessments were conducted by excess cancer risk and disease death risk using 1,000,000 Monte-Carlo simulations for probabilistic analysis. Results: Preschool-age children, students, housewifes, workers, and the elderly spent 91.9, 86.0, 79.8, 82.2, and 77.3% of their day in their house, workplace, or school, respectively. The more than 99% excess cancer risk for benzene exceed 1.0E-06 in all sub-populations and lifetime. The acute disease death risk for PM 10 for housewifes and workers for lifetime were 3.35E-04 and 3.18E-04, and chronic disease death risks were 2.84E-03 and 2.70E-03, respectively. Conclusions: The risk of benzene and PM 10 by sub-population group and for the lifetime of housewifes and workers were assessed. Benzene showed risky results for this study. All disease death risks of PM 10 were higher than 1.0E-04 and showed different risks by sub-population. This study can be used as a basis for lifetime exposure and risk assessment to benzene and PM 10 .