http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
열건조기내에서 슬러지 입자의 증발현상에 관한 수치해석 연구
구본기,김상수,Ku, Bon-Ki,Kim, Sang-Soo 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.8
The evaporation of sludge particles in a sludge dryer has been numerically investigated with commercial CFX4.1 code. Gas flow field, gas temperature field, sludge particle trajectories, and the moisture content variation of sludge particles are calculated fort various influencing factors, i. e., gas swirl velocity, initial particle distribution, gas temperature. Evaporation of sludge particles increases with gas swirl velocity, several supplying positions, and gas temperature, respectively due to increased residence time, increased contacting surface area, and increased temperature difference between gas and particle.
구본기,Ku, Bon-Ki 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.4
In many fields, nanotechnology is leading to the development of purposely-engineered nanoparticles and devices demonstrating new, unique and non-scalable properties. However, concern has been expressed that these same properties may present unique challenges in terms of the potential health impact. Airborne particles associated with engineered nanoparticles are of particular concern, as they can readily enter the body through inhalation. Research into the potential occupational health risks associated with inhaling engineered nanoparticles is actively being conducted in the U.S. and globally. In this article, the potential occupational health effects of inhaled nanoparticles and methods for measuring exposure to nanoparticles are discussed. Critical research needs in this field are also briefly addressed.
구본기 한국관광학회 2007 관광학연구 Vol.31 No.4
This study is to define and grasp of cost competition strategy and differentiation strategy that establish cost leadership and differentiation advantage. This cost leadership and competitive advantage through differentiation advantage involve business strategies that can improve travel agency’s management skills. Presented hypotheses involve that competition strategies will influence on the various factors including growth, employee attitudes and customer satisfaction positively. Author, through the self-administered questionnaire survey and relevant statistical test, suggest six implications including enhancement of morale of employee in the company, efficient merchandise management system (intranet system) and cost leadership on the part of travel agencies.핵심용어(Key words):경쟁우위전략(Competition predominance strategy), 경영성과(Management result),비용차별화우위(Cost differentiation advantage)
열음향 냉동기 스택에서의 열전도와 열펌핑의 해석 및 실험
구본기,송태호,Ku, B.K.,Song, T.H. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.3
A loud speaker-driven zero-c.o.p. thermoacoustic refrigerator where an automotive catalytic converter is utilized as a stack has been fabricated and investigated experimentally. Without any heat exchangers at both ends of stack(and thus with zero c. o. p.), temperatures on the stack are measured and various heat transfer rates are calculated from the measured temperatures. Temperatures on the stack have been also calculated numerically using a finite difference method. The measured temperatures are in fair agreement with the calculated temperatures for lower frequency than 300Hz, however, the former deviates from the latter considerably for higher frequency. Two types of c. o. p. have been defined as appropriate to the experiment. While the nominal c. o. p. is zero(the condition in which the pumped heat flow rate in the pore exactly cancels the axial heat conduction down the stack), the true c. o. p. is found to be about 0.14 for 300Hz from the experiments.