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마아케팅의 생태학적(生態學的) 접근법(接近法)과 환경적(環境的) 접근법(接近法)
장광수,Chang, Kwang-Soo 한국산학경영학회 1990 산학경영연구 Vol.3 No.-
This study focuses on the ecological and environmental approach for marketing in the attempt to harmonize the objectives and resources of the organizations with the changing environment. This study presents the deductive and nomative method for analyzing recurrent marketing problem and contains seven chapters. The marketing environment is the place the company must start in searching for oportunities and in monitoring threats. It consists of all the actors and forces that affect the company's ability to transact can be divided into two componets-The marketing environment comperies a microenvironment consists of the actors in the company's immediate environment that affect its ability to serve its customers, namely, the company, market channal firms, customers, competitors and publics, the macroenvironment consists of the larger societal forces that affect all the actors in the macroenvironment, nanly, the demographic, economic, natural, technological and cultural forces. Most marketing executives took the phyisical environment for granted. Few consistered it one of the most dynamic elements in the totoal environment of business. However, two development have brought the physical environment to the forefront of business decision. The first has been labeled the ecological crisis-the polution and deterioration of air, water and land, the second is the accelerated depletion of the earth's natural resources. Currently, most product are designed to obtain an optimum combination of customer acceptances and production and distribution efficiencies. If we look to the future, products increasingly will be planned to obtain an optimum combination of market acceptance increasingly, efficiency and environmental protection. The entire ecological cycle of product will have to be considered.
이동현(Dong Hyeon Lee),장광수(Kwang Soo Chang) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
Autonomous Intelligent Cruise Control(AICC) is a branch of Advanced Vehicle Control System(AVCS) which automatically controls inter-vehicle spacing without vehicle-to-vehicle communication. This paper presents a sliding mode control algorithm for the AICC system. The developed control algorithm was designed and simulated using a validated nonlinear vehicle model by adopting multiple sliding surface control scheme. The technique is powerful in highly nonlinear plant environment , e.g. vehicle powertrain. The controller is based on three sliding surfaces. Each surface plays an individual control - deviation control, throttle control, brake control. The simulation results show that the control algorithm satisfactorily controlled two and five vehicle platoons. The proposed control system guarantees robust vehicle following even when the leading vehicle exhibits transient speed change.<br/>
지구화학 모델을 이용한 장기간의 강알칼리성 지하수-암석의 반응 개념 모델링
최병영,류시원,장광수,김건영,고용권,최종원,Choi, Byoung-Young,Yoo, Si-Won,Chang, Kwang-Soo,Kim, Geon-Young,Koh, Yong-Kwon,Choi, Jong-Won 한국방사성폐기물학회 2007 방사성폐기물학회지 Vol.5 No.4
본 연구에서는 핵폐기물 매립장의 인공 방벽으로 사용되는 시멘트 물질들과 주변 지하수 반응 결과로 형성되는 강알칼리성 지하수와 주변 암과의 반응을 통해 변화되는 지하수 특성을 지구화학 모델링을 통해 예측하고자 하였다. 연구 결과 시멘트 수화반응을 통해서 pH는 13.3를 나타내었으며 이때 생성되는 광물들은 Brucite, Katoite, Calcium Silicate Hydrate(CSH 1.1), Ettringite, Hematitie, Portlandite였다. 이들 광물들과 경주 지역에서 채취된 지하수의 반응 모델링에서는 지하수의 pH가 12.4로 예측되었다. 이러한 강알칼리성 지하수와 주변 화강암과의 반응은 $10^3$ 년 동안 반응속도 모델링을 통해 모사하였다. 그 결과 지하수의 최종 pH는 11.2였으며 pH는 규산염 광물과 CSH 광물들의 용해 침전에 의해 조절되고 있었다. 또한 지하수 수질도 이들 광물들과 점토광물 및 산화광물들의 용해 침전에 의해 결정되고 있었다. 본 연구 결과는 장기간 동안의 강알칼리성 지하수와 주변 암과의 반응 모델링을 통해 지구화학 및 수질 변화를 예측함으로서 인공 방벽의 안정성 평가에 기여할 수 있을 것으로 판단된다.
이재형,함윤영,장광수,전광민,Lee, Jae-Hyung,Ham, Yun-Young,Chang, Kwang-Soo,Chun, Kwang-Min 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.2
A variety of approaches have been investigated for the application of spark-ignition engine knock control. The control method implemented, here as "Fuzzy Control", has the advantage of not requiring the knowledge of a mathematical model of the controlled object and is more robust and flexible than conventional approaches. Knock control in this study is performed using vibration signal which is measured with accelerometer attached to the cylinder block of a 1498cc four-cylinder spark-ignition engine. The experimental results obtained with this method are compared with those obtained with a knock interval controller and with those of a conventional controller. Those results illustrate better performance in torque than knock interval controller and conventional controller.ontroller.
인공수압파쇄 적용을 위한 울릉도 화산암류 저류특성 평가
김만일 ( Man Il Kim ),장광수 ( Kwang Soo Chang ),석희준 ( Hee Jun Suk ),김형수 ( Hyoung Soo Kim ) 대한지질공학회 2006 지질공학 Vol.16 No.2
대수층 저류 특성을 이용하는 대수층 저장 및 회수(ASR) 기술의 현장 적용성 평가를 위해 화산암 지대인 울릉도 내에 다공성 매질인 부석층으로 이루어진 대수층을 대상으로 양수시험 및 인공수압파쇄시험을 실시하였다. 공내TV검층에서 확인된 GL-13 m와 GL-21 m의 주파쇄대 구간에서 수압파쇄실험을 각각 실시하였고, 또한 수압파쇄 전과 후로 나누어 양수시험을 수행하였다. 사전/사후 양수시험 결과, 충적층이 위치한 GL-13 m 하부에서는 수리적 연결성을 확인할 수 있었으나, 암반층 구간인 GL-21 m 하부에서는 파쇄대의 연결 상태가 다소 불량한 것으로 판단된다. 현장시험 결과를 종합해 보면, 조사지역내 인공함양 적용은 불리한 조건을 가지는 것으로 판단되나, 현장 실험이 특정한 지역에서 이루어져 있기 때문에 울릉도 전반적인 지역 내에 ASR 적용성 평가를 대표할 수 없다. 따라서 울릉도내 전반적인 ASR 적용성 평가를 위해서는 보다 광역적인 실험이 수행되어야 할 것으로 판단된다. In order to establish the in-situ application of the artificial storage and recovery (ASR) technology which is used the property of the aquifer storage of groundwater. We carried out to the in-situ experiments such as borehole TV logging, pumping test and artificial hydraulic fracturing in volcanic island, Ulleungdo. In-situ experiments were conducted to divide the before- and after-hydraulic fracturing. Pumping test was achieved to confirm the two fracture zones, GL-13m and GL-21m, which are determined by the borehole TV logging. From the results of the before- and after-pumping tests, the hydraulic connectivity was confirmed to locate at GL-13m in the residual deposit zone of pumice media as alluvium. However, in the bedrock zone at GL-21m the hydraulic connectivity could be considered to faulty. Consequently, in this study area the artificial recharge has a little unsatisfied to geostructural condition and desired to more detail investigation works.
실린더 블럭 진동 신호를 이용한 스파크 점화 기관의 단순 노킹 제어
함윤영(Yun-Young Ham),이재형(Jae-Hung Lee),장광수(Kwang-Soo Chang),전광민(Kwang-Min Chun) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1994 No.11_1
To minimize fuel efficiency loss and power loss by knocking, spark timing was controlled near the knock occuring limit, using cylinder block vibration signal. Vibration signals of a 1498cc four-cylinder spark ignition engine was measured using accelerometer which was attached to the cylinder block. The signals from this sensor was put through the band-pass filter and knock occurrence was determined by comparator.<br/> In this study, the simple knock control algorithm in which spark timing was advanced when knock occurred and retarded when knock did not occur was tested experimentally. Experiment was carried out varying the correction interval of spark timing advance at WOT. 2000 rpm. Knock occurrence was reduced when the correction interval increased and when retard crank angle was 3° rather than 2° . The engine torque was increased with this knock control system, without continuous knocking.<br/>