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The exponentiated extreme value distribution
조영석,한준태,강석복 한국데이터정보과학회 2009 한국데이터정보과학회지 Vol.20 No.4
This paper deals with properties of the exponentiated extreme value distribution. We derive the approximate maximum likelihood estimators of the scale parameter and location parameter of the exponentiated extreme value distribution based on multiply Type-II censored samples. We compare the proposed estimators in the sense of the mean squared error for various censored samples.
조영석,김주필,최병진,원장만 한국환경생물학회 2006 환경생물 : 환경생물학회지 Vol.24 No.2
- The purpose of this study was to ascertain the prey composition and utilization of theEurasian otter, , in the ecosystem conservation region of the Seomjin River. The studywas conducted for a 12-month period from March 2003 to February 2004 by spraints analysisand an investigation using artificial holts. We found seasonal variation in the number of spraintsand composition of prey items. Fish were the main prey items throughout the period (82%), andother prey items included birds (14%), amphibians (2%) and arthropods (1%). In addition totraces of otters were discovered in five of the six total artificial holts. However, the utilization ofthe artificial holts in the study area seemed to be limited as evidenced by the low frequency oftraces in the holts.
음폐수 주입이 폐기물의 생물학적 압축 촉진에 미치는 영향분석 연구
조영석,장연수 한국폐기물자원순환학회 2020 한국폐기물자원순환학회지 Vol.37 No.3
In this study, as a study on bioreactor landfills, the effect of Food Waste Leachate (FWL) injection on the accelerationof waste biocompression was examined by performing settlement experimentation using lysimeters. In the experiment,liquid was injected into the waste through three conditions, i.e. injection of distilled water, leachate recirculation, andrecirculation of leachate mixed with FWL. Compared with two other liquid supplying conditions, analyses of the chemicaloxygen demand (COD) and pH value of leachate showed that the recirculation method of mixing leachate and FWL whichsupplies additional nutrients, i.e. the organic matter in FWL, increases microbiological activities that decompose the wasteand allows an optimal pH value for waste biodegradation. Analysis of waste settlement curves and the characteristics ofwaste settlement showed that the recirculation of leachate mixing FWL could accelerate the waste settlement as muchas 2.9 times and 2 times more than those of the distilled water injection and the leachate recirculation, respectively. Basedon the results of this study, the recirculation of leachate mixing FWL would help to stabilize the landfill early byaccelerating the waste settlement and to gain additional spaces in the landfill. 없음
조영석,조영생 대한기계학회 1984 大韓機械學會誌 Vol.24 No.2
마이크로 컴퓨터는 산업적으로 대형기기와 사람을 연결해 주어 생산정보, 설계정보등의 처리 및 생산공정상의 공정제어장치의 중추적 역할을 담당하고 있다. 앞으로의 하드웨어(hardware) 소 프트웨어(software)의 경향이 더욱 낮은 가격으로 많은 처리 \ulcorner력을 갖는 추세이므로 이의 적 절한 응용분야를 택하여 개발하면 고도화된 신기술로 생산성이 향상될 것이다. 우리나라에서도 생산성 향상 및 국제 경쟁력 향상을 위해 마이크로 프로세서의 적절한 응용이 불가피하다. 이에 본 해설은 마이크로 프로세서의 기본적 개념과 이의 산업적 응용에 대하여 간단히 서술하고자 한다.