EGR 및 예혼합 정도가 메탄/공기 화염이 NO 생성에 미치는 영향

이원남(Won-Nam Lee),이웅재(Woong-Jae Lee) 한국연소학회 1999 한국연소학회지 Vol.4 No.2

논문 : 매연 및 온도 분포에 따른 이색법 확산화염온도의 오차

이원남 ( Won Nam Lee ) 단국대학교 산업기술연구소 2003 산업기술연구 Vol.3 No.-

발달장애 성인자녀를 둔 부모의 돌봄 스트레스와 삶의 만족도 -가족탄력성, 대처방식의 매개효과-

이원남 ( Lee Won Nam ),김경신 ( Kim Kyeong Shin ) 한국가족관계학회 2017 한국가족관계학회지 Vol.21 No.4

Objectives: This study was carried out in order to evaluate the overall process that the caregiving stress of parents of adult children with developmental disabilities affected their life satisfaction through the levels of family resilience, and coping styles on the basis of stress-coping-adaptation model of Lazarus and Folkman(1984). Method: For this purpose, the structured survey was conducted by 394 parents of adult children with developmental disabilities. The data was analysed by AMOS 20.0 version. Results: The findings can be summarized as follows: First, the structural equation model(SEM) analysis was conducted in order to examine the various paths that parents` caregiving stress affected their life satisfaction. The model`s goodness-of-fit was fine(x²=225.20, df=95, p=000. RMSEA=.06, TLI=.95). There were significant relationships between caregiving stress and family resilience(β=-.36, p<.001), emotion-focused coping style(β =.47, p<.001), life satisfaction(β=-.53, p<.001). Second, family resilience and emotion-focused coping showed mediating effects on the relationship between caregiving stress and life satisfaction. Conclusions: The strategies for enhancing family resilience and social services for applying effective coping methods should be expanded in order to diminish the caregiving stress of parents of adult children with developmental disabilities.

발달장애 성인자녀를 위한 부모의 평생계획 수립에 관한 연구

이원남 ( Won Nam Lee ),김경신 ( Kyeong Shin Kim ) 한국가족관계학회 2014 한국가족관계학회지 Vol.19 No.1

This study was conducted in order to examine the influence of sociodemographic characteristics, family resilience, self-help groups characteristics of families with the disabled on the establishment of permanency planning targeting the parents of adult children with developmental disabilities. The structured survey was conducted targeting 264 parents of children with developmental disabilities over the age of 18 years old in Gwangju and Jeollanam-do. Using SPSS 18.0 the data frequency, percentage, t-test, ANOVA and hierarchical regression analysis were conducted. The major findings were as follows: First, the need of permanency planning for adult children with developmental disabilities which their parents recognize was shown high. However, the readiness of the permanency planning for the disabled children was shown generally low. Second, the functional level of daily life, family resilience, the level of care giving burden, family income and supports from self-help groups were identified as statistically significant predictors for the level of permanency planning. The implications of those results were discussed.

특급호텔 노동조합의 역할이 직무만족, 고용안정 및 기업성과에 미치는 영향: 서울 소재 특급호텔 노동조합원을 중심으로

이원남(Lee, Won-Nam),한진수(Han, Jin-Soo) 한국웰니스학회 2024 한국웰니스학회지 Vol.19 No.2

본 연구는 서울소재 특급호텔 노조조합원들을 대상으로 노동조합의 역할이 직무만족, 고용안정 및 기업성과에 긍정적인 역할을 미치는지, 부정적인 역할을 미치는 탐색적으로 실증 분석하고자 하였다. 이를 통해 호텔 노동조합의 역할을 재조명해보고 노동조합에 대한 인식을 올바르게 정립될 수 있는 계기가 마련될 수 있기를 기대해 본다. 본 연구에서는 노동조합의 역할이 직원의 인식(직무만족, 고용안정)이라는 매개변수에 의하여 기업성과(내부/외부)에 영향을 미치는 가설검증을 구조방정식 모델을 활용하여 분석을 실시하였다. 또한 매개변수의 효과를 검증하기 위하여 소벨 검증(Sobel test)을 실시하였으며, 다음과 같은 결과를 도출하였다. 첫째, 노동조합의 역할이 직원의 인식(직무만족, 고용안정)에 유의하게 영향을 미쳤다. 둘째, 직원의 인식(직무만족, 고용안정)이 기업성과에 미치는 영향에 대해서는 고용안정성➝기업성과(내부)의 경우에만 유의하지 않았으며, 그 외 모두 유의한 결과가 나타났다. 셋째, 노동조합의 역할, 직원의 인식, 기업의 성과와의 연관관계에서는 노동조합의 역할➝고용안정성 ➝기업의 성과(내부)에서는 유의한 차이를 보이지 않았지만, 그 외의 요소에서 노동조합의 역할과 기업의 성과에 직원의 인식(직무만족, 고용안정)은 매개효과를 가지고 있음을 확인하였다. 향후의 연구에서는 단순히 노동조합원의 관점에서만이 아닌 비노조원을 포함하는 호텔종사원 전체의 다양한 시각에서의 호텔노조의 역할에 대한 체계적인 접근이 이루어진 연구들이 진행될 필요성을 가지고 있다. This study aims to explore and demonstrate whether the role of labor unions plays a positive role in job satisfaction, job security, and corporate performance for union members in Seoul. It is hoped that this will provide an opportunity to re-illuminate the role of the hotel labor union and properly establish awareness of the labor union. In this study, an analysis was conducted using a structural equation model to verify hypotheses that the role of labor unions affects corporate performance (internal/external) according to the parameter of employee recognition (job satisfaction, job stability). In addition, Sobel test was conducted to verify the effectiveness of the parameters, and the following results were derived. First, the role of labor unions had a significant impact on employee perceptions (job satisfaction, job security). Second, the impact of employee perceptions (job satisfaction, employment stability) on corporate performance was not taken into account only in the case of employment stability ➝ corporate performance (internal), and all other results were significant. Third, labor union roles ➝ Employment stability ➝ Although there was no significant difference in the performance (internal) of labor union roles and corporate performance, it was confirmed that employee recognition (job satisfaction, employment stability) had a mediating effect in other factors. In future research, there is a need for research that has been approached not only from the perspective of union members but also from a more diverse perspective.

동축류 확산화염의 불안정성과 제어에 관한 실험적 연구

이현호,황준영,정석호,이원남,Lee, Hyeon-Ho,Hwang, Jun-Yeong,Jeong, Seok-Ho,Lee, Won-Nam 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.1

Flame oscillation phenomena in a co-flow diffusion flame was experimentally studied with periodic fuel supply using a solenoid valve. The degree of excitation was controlled by changing the volume flux of fuel passing through the valve. Flame oscillation frequencies were measured utilizing a photodiode, a spectrum analyzer, video and high speed movies. Laser planar visualization was employed to study the correlation between the flame oscillation and the toroidal vortices. Observed are three regimes of flame oscillation, where the oscillation frequencies are for the multiples of excitation, the excitation itself and the flame natural oscillation. Both periods of natural oscillation and of excitation induced oscillation exist over one cycle of the excitation in the frequency multiplied regime. It is considered as an effect of balancing the influence of buoyancy driven vortex with that of excitation induced vortex near the excitation rate of 0.2. Flame shapes are become monotonous as increasing the excitation frequency to the range of over two fold of the natural oscillation. The flame oscillation can be modulated to the frequency of either multiples of excitation or excitation itself under certain conditions. This implies that the flame oscillation could be modulated to avoid the resonance frequency of the combustor, and shows the possibility of active control of the flame oscillation.

레이저 및 열전대를 이용한 동축류 확산화염에서의 매연입자 측정에 관한 연구

한용택(Yong-Taek Han),이기형(Ki-Hyung Lee),이원남(Won-nam Lee) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4

The temperature and soot particle measurement technique in a laminar diffusion flame have been studied to investigate the characteristics of soot particle with temperature using a co-flow burner. The temperature distributions in the flame were measured by rapid insertion of a R-type thermocouple and the soot particles were detected were detected by LEM/LIS techniques. In these measurement, soot volume fraction, number density and soot diameters were analyzed experimentally. As a results, the spacial distributions of particle volume fraction, soot diameter, and number density are mapped throughout the flame using the Rayleigh theory for the scattering of light by absorbing particles. A laser extinction method was used to measure the soot volume fraction and Laser induced scattering method was used to measure the soot particle diameter and number density. Also, we measured temperature without the effect of soot particles attached to the thermocouple junction, which is close to the nozzle. In this result, we found that upstream zone has a unstable flowing in co-flow diffusion flame and the y-axis temperature of flame has a uniform temperature distribution in the most soot volume fraction zone.