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송규근(Kyukeun Song),김상민(Sangmin Kim),정재연(Jaeyeon Jung),심상철(Sang cherl Sim),김형곤(Hyunggon Kim) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
in this study. This experiments were performed the spray characteristics of diesel spray in common-rail system according to fuel temperature, injection pressure and spray time etc. Diesel have different spray patten due to injection pressure and spray time in common-rail system. A Filter pressure is influenced by fuel temperature which is turned to fuel viscosity related to a fluid flowing.
송규근(Gyu Geun Song),이기세(Ki Se Lee) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.44
The purpose of this study was to describe the talents and the requirements of security guards that experts in the public security field perceive. To achieve this aims, this study was conducted with interviews of six people, who are police officers and soldiers having more than three years security guard experience. The contents of depth interview for security guard experts was recorded, and categorized and classified. The results are as follows. First, the result showed height, appearance, martial arts and physical strength as the physical requirement of an outstanding security guard. Futhermore, it was emphasized on individual diversity that is fit for a military operation and duty for height and appearance. Also, it was highlighted boldness, agility and sensitive situation judgment through training of martial arts. Second, it was presented judgment, intuition and personal relationship and personality as mental requirements for one. For these, it was emphasized that various experiential knowledge, linguistic & non-linguistic communication skill. Lastly, it showed intelligence, shooting and language as training requirements for the outstanding security guard. Based on the results, universities including department related to security guard and private institutions may need to make up for courses and programs and clarify educational direction so as to build up the above requirements.
류호성(Ho-Sung Ryu),송규근(Kyu-Keun Song) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A diesel engine is one of the major prime movers owing to its high chermal efficiency. But due to the recent attention for the environmental pollution. the emissions of diesel became a important problem. So it is needed to understand the characteristics of diesel spray injected into a combustion chamber. Because the diesel combustion is strongly controlled by a fuel injected into a combustion chamber.<br/> In this paper experiments were conducted for the variations of injection pressure (6. 10. 14 MPa). Velocity of motor (500. 750)<br/> 1000rpm) and impinging angle (0 30 45 ) to investigate the characteristics of diesel fuel impinging spray. And the notions impinging width. impinging thickness of the diesel spray are introduced to discuss the structure of the impinging spray
김상민(Sangmin Kim),송규근(Kyukeun Song),정재연(Jaeyeon Jung),심상철(Sangcherl Sim),김형곤(Hyunggon Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
The using of diesel engine will be increased in the world for fuel economy. But diesel engine exhaust emission such as much NOx, smoke etc. In this study. This experiments were performed the spray characteristics of diesel spray in common-rail system according to fuel temperature, injection pressure, injector spray time and fuel viscosity etc. Diesel have different spray patten due to injection pressure and spray time in common-rail system. A Filter pressure is influenced by fuel temperature which is turned to fuel viscosity related to a fluid flowing. The effect of the bio-diesel fuel mixing ratio on the spray and atomization characteristics was also investigated at various experimental conditions. It shows that the droplet atomization characteristics of bio-diesel fuel show deteriorated results as the mixing ratio of biodiesel increased because of the high viscosity.