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박정규,Park, Jung-Gyu 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.2
In this paper, a friction compensation method using a disturbance observer is proposed for an impedance control of pneumatic manipulator. It is assumed that the generated torque by a pneumatic actuator can be estimated based on the pressure signals and the discharge volume. In order to improve the dynamic characteristics of the pneumatic actuator driven by meter out method, we construct the inner torque control system by feeding back the generated torque. In order to reduce the influence of disturbances comprising friction torque and parameter variations of plant, the impedance control system is constructed with a disturbance observer which estimates the disturbances based on the generated torque of pneumatic actuator, the angular velocity and the reaction torque. From some experiments, it is confirmed that the proposed control system is effective to improve the robustness for the friction torque in the impedance control of a pneumatic manipulator.
TPA로 분화된 U937 세포에서 사람 세포거대바이러스에 의한 c- jun Promoter 활성도의 변화
박정규(Jung Gyu Park),김대중(Dae Joong Kim),김진희(Jin Hee Kim),한태희(Tae Hee Han),황응수(Eung Soo Hwang),최명식(Myung Sik Choi),국윤호(Yoon Ho Gook),최성배(Sung Bae Choi),차창룡(Chang Ryong Cha) 대한바이러스학회 1999 Journal of Bacteriology and Virology Vol.29 No.2
Transient transfection assay has been done to evaluate whether the c-jun activation would be prerequisite to the induction of permissiveness against human cytomegalovirus using in vitro cell model in which U937 has been induced to express CD11b and CD14 to become potential monocyte/macrophage cells by TPA treatment. U937 cells were treated with 10 ㎛, 50 ㎛ or 100 ㎛ of TPA. The cell morphology change was observed and the expression of the CD11b and CD14 was confirmed by FACS. Differentiated cells were transfected with pJLuc reporter vector which contained the wild type murine c-jun promoter spanning the SP1, CTF, ATF/CREB and MEF-2 binding sites upstream of the firefly luciferase gene. After 48 hrs of transfection, the cells were infected with HCMV Towne strain and the luciferase activity was assessed at 1 h and 4 h pi. The transfection assay showed no activation of the c-jun promoter at 1 h pi, instead, it showed 2 times increase of the its activity at 4 h pi. There was no difference of the c-jun promoter activation between TPA treated and untreated U937 cells, implying that c-jun activation might not be prerequisite for allowing cells to be premissive to HCMV, although HCMV infection itself could activate c-jun promoter.
건물/설비시스템 요소와 에너지 소비량의 상관분석을 통한 업무용 건축물의 친환경 계획요소에 관한 연구
박정규(Park, Jeong-Gyu),박정로(Park, Jung-Lo),오중근(Oh, Jung-Keun),김재준(Kim, Jae-Jun) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.1
Korean energy consumption levels by industry show the construction sector takes up 22% amongst all industries, following the manufacturing sector at 54%. Accordingly, it is necessary to cut down on the energy consumption of existing buildings in the home and commercial sectors. Korean Eco-friendly related regulations and policies have been improved and developed to cut down the energy consumption of buildings, while being limited in application to newly constructed facilities and those using elemental technology. The study suggests a move to more eco-friendly elements of design in office buildings by analyzing the correlation between the elements of buildings, their systems and energy consumption that occurs during the maintenance stage. The analyzed usage data was limited to office buildings, and eco-friendly designing elements were restricted to building/system elements. Also, the range of data was from January to December in 2011 (1year), and the energy consumption was defined as gas, electric, and sewage from the details of maintenance information. The results of this study are as follow. First, buildings facing the southwest have lower average energy consumption in terms of the location elements. Second, according to the analysis on the correlation of energy consumption, in terms of shape elements, the greater the number of elevators, floors, the area of a standard floor and the total floor area are, the greater the sewage output is.
박정규 ( Jung Gyu Park ) 한국환경정책평가연구원 2002 환경정책연구 Vol.1 No.1
가솔린 첨가제인 MTBE(Methyl Tertiary Butyl Ether)는 대기오염 저감효과가 뛰어나지만, 사람의 건강이나 환경에 미치는 위해성이 매우 커 선진국에서는 사용을 금지시키고 있다. MTBE는 독특한 맛과 냄새를 지녀 오염된 물을 음용수로 사용할 수 없게 만들 뿐 아니라, 동물실험 결과 발암성이 확인되기도 하였다. 그 외 생식독성을 일으키고 내분비계 장애물질로 의심될만한 연구결과가 발표되기도 하여, 우리나라에서도 MTBE의 오염원, 오염경로 및 오염정도에 대한 기초연구 조사가 시급히 요구된다. 국내 현황자료와 선진국에서 진행중인 MTBE의 위해성 자료 및 평가결과를 참조하여 국내 현실에 적합한 관리방향 및 정책이 수립되어야 할 것이다.
박정규(Jung-Gyu Park),정석봉(Seok-Bong Jeong) 한국의사결정학회 2019 의사결정학연구 Vol.27 No.2
농산물의 가격은 기후 변화와 수요/공급의 불균형에 의해 급격히 변동할 수 있으며, 가격이 급변하는 농산물에 대하여 수확이나 출하 시점보다 훨씬 이전에 생산 의사결정을 해야 하는 농업경영자들은 출하 시점의 가격변동에 대한 위험관리방안이 필요하다. 이를 위하여 본 연구는 주식시장, 외환시장, 부동산시장에서 자산 포트폴리오의 리스크 관리 및 효율적인 포트폴리오 구성에 주로 활용되었던 MST기법을 농산물에 적용하는 방안을 제안하였다. 실험 결과 MST분석을 통해 농산물시장의 개별 상품들을 동일한 특성을 가진 몇 개의 하위 그룹으로 구분할 수 있었으며, 이를 통해 개별 농작물의 가격변동 위험을 관리할 수 있는 효율적인 포트폴리오 구성을 위한 정보를 얻을 수 있었다. 또한, 연도별로 농작물의 MST 네트워크 구조를 분석으로써 농작물들간의 상관구조가 시간에 따라 변화하는 모습을 확인할 수 있었으며, 농산물 가격의 상승기 및 하락기의 MST 네트워크 특성을 규명하였다. This paper analyzes the topological structure of agricultural market networks by applying minimum spanning tree(MST) method into national agricultural retail market over the period 2013.7-2018.6. Many previous researches have applied MST into stock, foreign exchange, real estate markets in order to composite efficient asset portfolio for risk management. The research finds an existence of communities or modules in networks, an existence of correlation breakdown due to the time-dependent structure of networks and so on from this application of minimum spanning tree.