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박정균 경인여자대학 1994 경인논집 Vol.- No.3
1983년에 작업환경측정 실시규정이 노동부령으로 제정된 이후 현재까지 6차례의 개정이 이루어 졌다. 자율적인 측정실시의 원칙이 1991년 3차 개정을 거치면서 일정한 자격요건을 갖추어야 측정을 수행할 수 있도록 측정자의 자격을 제한 하였고 측정결과도 의무적으로 보고토록 규정하여 국가관리의 체계를 확정하였다. 그러나 작업환경 측정이 사회적 관심도의 증가에 비해 전문성의 결여 등 여러요인에 의해 실효를 거두지 못하자 유해인자별 전문연구기관을 지정하였고 정도관리의 시행과 작업환경측정 횟수조정등 부분적으로 개정하였으며 최근에는 한국형 작업환경 측정제도의 개발을 위한 연구용역이 수행되었다. 그러나 제도가 세분화 될수록 행정력의 소모가 크고 자율성이 퇴조되어 발전에 대한 저항력이 커지게 된다. 그러므로 행정편의에 입각한 규정을 과감히 정리하고 사업주 위주의 작업환경 관리를 정착시키는 것이 필요하다. 따라서 작업환경관리는 반드시 자율성을 바탕으로 정착되어야 하고 일부 그롯된 의식과 관행이 방치되거나 소홀히 취급되어서는 않된다. 기업경영 또한 작업환경관리의 근간이 되는 인간존중의 이념을 바탕으로 하여 계획하고 실천해야 한다. 그것이 생산성의 제고와 경쟁력의 우위성 확보는 물론 근로자의 건강한 노동생활의 질을 보장하는 가장 확실한 지름길이기 때문이다.
내장형 선형 안테나를 이용한 대면적 유도결합형 플라즈마 소스에 관한 연구
박정균,임종혁,김경남,염근영 한국표면공학회 2007 한국표면공학회 학술발표회 초록집 Vol.2007 No.-
평판 디스플레이의 대면적 플라즈마 공정을 위하여 내장형 선형 안테나를 설치하였고 실질적인 식각 균일도를 알아보기 위하여 floating antenna의 전압 분포 조건에서 glass 위에 2㎛의 photoresist가 도포된 시편을 사용하여 식각을 하였다. 식각 균일도 실험은 5kW의 입력전력과 15mTorr의 O₂gas 조건에서 40분 동안 진행하였다. 그 결과 2,300 mm × 2,000 mm의 기판 상에서 약 11%의 식각 균일도를 얻을 수 있었다.
Transport properties of sorbing contaminants in a fractured granite under oxidizing conditions
박정균,한필수,조원진 한국화학공학회 2006 Korean Journal of Chemical Engineering Vol.23 No.5
to understand the transport behavior of contaminants at underground environments. For the tracers, tritium and anionswere used as nonsorbing ones and some sorbing cations such as Sr, Co and Cs were used as well. The experimentalstudy was focused on the identification of the retardation and matrix diffusion of the tracer in the fracture. The hydraulicconductivity in the fracture was determined from the pressure diferentials between pairs of boreholes. The hydraulicdata were used with a variable aperture channel model to characterize the aperture distribution in the fracture. A transportmodel has been developed to describe the migration of the solutes in the flow field by using a particle tracking method.have been explored with the transport model which takes into account sorption and diffusion into the rock matrix. Thiscomparison may contribute to further understanding on the heterogeneous flow field and the interactions betwen rockand chemical species.
Diffusion of some chemical species through a granite considering their geochemical properties
박정균,백민훈 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.5
Through-diffusion experiments for some chemical species onto granite have been carried out to understand their diffusion characteristics according to their geochemical properties. The chemical species used in the experiment were classified into three groups as a nonsorbing tracer, simple cation and multivalent species. The difference in the diffusion process among the nonsorbing tracers was evaluated and discussed in terms of their interactions with the rock’s pore surface. The extent of surface diffusion was examined from the view of sorption reversibility for the sorbing cations. For the multivalent species, two kinds of experiments were performed to study the effects of geochemical conditions in acidic and alkaline solutions. Chemical species and sorption properties were also investigated as a function of the pH and carbonates in order to examine the effects of the carbonates on diffusion in alkaline conditions.
Diffusion behavior of THO, Sr, Cs, and Am through concrete and its chemical degradation
박정균,박태진,이재광,권장순 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.5
To understand the transport processes in a repository silo for radioactive waste, the diffusion behavior of tritium (THO), strontium (Sr), cesium (Cs), and americium (Am) through concrete was investigated using a through-diffusion setup. The concrete and groundwater used in this study were sampled from the waste repository site. The diffusivity of the nuclides was obtained by a linear curve fitting of the diffused concentration data against time. After 18 months, the concrete coupons and solutions were recovered from the experimental setups. A sequential chemical extraction was carried out with the recovered coupons to determine the types of sorption involved in the nuclides diffusion processes. The THO transported freely through the concrete pores without sorption. The sorption of Sr and Cs was reversible, whereas that of Am was highly irreversible with a very low diffusivity. After a year in the diffusion test, some precipitate and suspended matter were observed. The precipitates were analyzed with SEM, EDS, and XRD. Identified as calcium carbonates and magnesium compound, they are likely formed by the chemical degradation of the concrete.