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수소 첨가에 의한 중대형 천연가스 기관의 기관 성능 향상
임희수(Heesu Lim),김윤영(Yunyoung Kim),이종태(Jongtai Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
An experimental study was carried out to investigate the effect on an engine performance by an addition of hydrogen to natural gas. The results showed that heavy-duly hydrogen-CNG engine can be stably operated at ultra lean operating. and reduce emission extremely. Thermal efficiency was increased due to combustion improvement by addition of hydrogen to natural gas. But torque was decreased at λ=1.4, and increased over that.<br/>
만성조현병 환자 가족의 극복력 증진 프로그램의 개발 및 효과
임희수(Lim, HeeSu),한금선(Han, KuemSun) 한국간호과학회 2013 Journal of Korean Academy of Nursing Vol.43 No.1
Purpose: The purpose of this study was to evaluate the effects of the Family Resilience Enhancement Program (FREP) on family hardiness, family sense of coherence, family problem solving communication, family crisis oriented personal evaluation, and adaptation in families of patients with chronic schizophrenia. Methods: The study design was a nonequivalent control group prepost test design. Study participants were 17 families in the experimental group and 17 in the control group. Ten sessions of FREP were provided over 5 weeks. The data were analyzed using SPSS 15.0. Results: There were statistically significant differences in family hardiness, family sense of coherence, family problem-solving communication, family crisis-oriented personal evaluation, social resources, and family adaptation between the experimental group and the control group. Conclusion: FREP based on the family resilience model developed in this study, shows the effect of leading the families to positive family adaptation.
노기철(Kichol Noh),윤재성(Jaeseong Yoon),박상욱(Sangwook Park),이종태(Jongtai Lee),임희수(Heesu Lim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The hydrogen fueled free piston engine is acknowledged as the next generation power system which is able to obtain high efficiency and low emission, concurrently. So, it is schemed to improve the performance of the hydrogen fueled free-piston engine in order to ensure the possibility to substitute the fuel cell. Hence the performance of the hydrogen fueled free-piston engine is analyzed by using linear RICEM for the change of fuel supply pressure and equivalence ratio. As the results, at fuel pressure Pf=6bar and equivalence ratio φ=0.5, respectively thermal efficiency is over 50% and hydrogen fueled free-piston engine is estimated to possible substitute for the fuel cell under this condition.