• Proceedings of the KSME Conference
• /
• 2000.11b
• /
• pp.704-709
• /
• 2000

Laminar burning velocities of propane- and iso-octane-air mixtures have been numerically modelled over a wide range of equivalence ratio, pressure and temperature. These correlations are applicable to the modelling of stratified charged combustion like that of lean bum and GDI engine combustion. The numerical models are based on the results calculated by PREMIX code with Sloane's detailed chemical reaction mechanism for propane and FlameMaster code with Peters' for iso-octane. Laminar burning velocity for two fuels showed a pressure and temperature dependence in the following form, in the range of $0.1{\sim}4MPa$, and $300{\sim}1000K$, respectively. $S_L={\alpha}\;{\exp}[-\xi({\phi}-{\phi}_m)^2-{\exp}\{-{\xi}({\phi}-{\phi}_m)\}-{\xi}({\phi}-{\phi}_m)]$ where ${\phi}_m=1.07$, and both of ${\alpha}$ and ${\xi}$ are functions of pressure and temperature. Compared with the results of the existing models, those of the present one showed the good agreement of the recent experiment data, especially in the range of lean and rich sides. Judging from the calculated results of the stratified charged combustion by using STAR-CD, the above modelling prove to be more suitable than the other ones.

• Women's Health Nursing
• /
• v.21 no.4
• /
• pp.342-354
• /
• 2015

Purpose: The purpose of this study was to test the effect size of intervention programs for married immigrant women as well as to suggest the basic data for health care practices for married migrant women. Methods: Meta-analysis was conducted with 27 articles from domestic Korea master's and doctorate degree dissertations and Korea academic journals from 2007 to 2014. Results: Overall average effect size was 1.17 and 'parental education' of Intervention Variables was the biggest effect size. Intervention Variables were also identified to be the most desirable in cases when total sessions were applied with 10-18 sessions, 1 session per week, 90-120 minutes per session activity time and with less than 10 subjects in group size. Regarding effect variables, psychological variable group was identified to show the biggest effect size and in sub-variables, self-efficacy was identified to show the biggest effect size. Conclusion: If intervention programs for married immigrant women is expanded and conducted based on the results of this study, the program would have significant affect psychological, social and physical health of the married migrant women who currently occupy the important status in our society.

• Journal of the Computational Structural Engineering Institute of Korea
• /
• v.22 no.5
• /
• pp.439-444
• /
• 2009

This paper presents an efficient contact detection algorithm for the plane elastostatic contact problem of the boundary element method(BEM). The data structures of the boundary element method are dissected to develop an efficient contact detection algorithm. This algorithm is consists of three parts as global searching, local searching and contact relation setting to reflect the corner node problem. Contact master and slave type elements are used in global searching step and quad-tree is selected as the spatial decomposition method in local searching step. To set up contact relation equations, global contact searching is conducted at node level and local searching is performed at element level. To verify the efficiency of the proposed contact detection algorithm of BEM, numerical example is presented.

• Proceedings of the KSR Conference
• /
• 2007.05a
• /
• pp.1864-1874
• /
• 2007

Korean trains pass many mountain areas, so the volume of structures like bridge and tunnel has large part of railway lines. Train speed-up naturally needs a straight line in railway, then structures are increasing, and the length of structure has more than 70% in Kyongbu high-speed railway. The stiffness of bridge and tunnel is higher than the soil in the roadbed in spite of dynamic difference in vibration and displacement. Differences in stiffness have more dynamic effects and increase the deformation and destruction in the track and roadbed. This influences passenger's comfort and the safety of operation, and it needs more track maintenance. This study selected tunnel with ballast track, tunnel with concrete track, and structure's approaches with short maintenance cycle in the roadbed and had track acceleration tests and track liner inspections using track master in the field. This study will measure periodically to structure's approaches which have very fast track irregularity and analyze dynamic differences and track irregularity near structure's approaches, so realize the cause of track irregularity of structure's approaches and use basic data for reasonably strengthening method of structure's approaches.

• Journal of Fisheries and Marine Sciences Education
• /
• v.24 no.2
• /
• pp.246-262
• /
• 2012

This study analyzed the trend of researches regarding parenting involvement of fathers with early childhood children in terms of research period, research content and research method. Forty master's thesis and doctoral dissertation and 22 articles were selected for final analysis. Collected data were analyzed using frequency and percentage ratio. The results of this study showed that research on the parenting involvement of fathers has been rapidly increased since 2005. From the perspective of research content, studies dealing with parenting involvement of fathers as an independent variable focused on early children and social and emotional variables. Most of studies dealing with parenting involvement of fathers as an dependent variable consistently dealt with demographic variables. From the perspective of research method, most researches were quantitative and non-experimental. No research was done using qualitative method and all researches except one were done using non-experimental method. The number of participants in most researches were over 100 and less than 400. Most researches used participants from one particular district. Research instruments validated in Korea were used in most researches. These results were discussed with suggestions for further study.

• The Korean Journal of Health Service Management
• /
• v.11 no.4
• /
• pp.29-40
• /
• 2017

Objectives : The purpose of this study was to identify the effects of emotional competence, learning organization and nursing organizational culture on performance among clinical nurses. Methods : This study was conducted over a six-month period, with 170 nurses from general hospitals with 400 beds in three regions of Korea. Data were gathered from August 25th to September 10th, 2016, using a self-report questionnaire, and analyzed using the IBM SPSS 19.0 program. Results : The significant predictors of nursing performance were self-awareness (${\beta}=.32$), a master's degree or higher (${\beta}=.20$), relationship management (${\beta}=.26$), personal mastery(${\beta}=.23$), and 5~10 years in a clinical career (${\beta}=.16$). These variables explained 47.3% of the variance in nursing performance. Conclusions : To improve nursing performance, interventions that can enhance nurses' emotional competence and the need for program development to enhance their learning organization, as well as related variables, including academic credentials and clinical career, should be considered.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.51 no.3
• /
• pp.396-404
• /
• 2015

Morotoge shrimp Pandalopsis japonica is caught by pot and others in the eastern coastal waters of Korea. Comparative fishing experiments were carried out in the eastern coast of Korea, using the dome-shaped pots with different five mesh sizes (17.1, 24.8, 35.3, 39.8, and 48.3 mm) in order to estimate the mesh selectivity of the pot for the morotoge shrimp, Pandalopsis japonica. The SELECT (Share Each Length's Catch Total) analysis method was applied to the catch data. The master selection curve of the pot for the shrimp was estimated to be s(R) = exp(15.770R-10.573)/[1+exp(15.770R-10.753)], where R is the ratio of carapace length to mesh size. From the selection curves, the carapace lengths of 50% retention were 11.6, 17.0, 23.9, and 34.1 mm for 17, 25, 35, and 50 mm mesh-size pot, respectively. It means that the pots of larger mesh size allow more shrimp of small size to escape.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.20 no.4
• /
• pp.381-388
• /
• 2013

Purpose: This study was done to investigate nurses' awareness of death and the meaning of life and identify factors influencing the meaning of life. Methods: Participants were 198 women nurses who had experienced the death of patients. They answered a self-administered questionnaire including demographics, awareness of death scale and meaning in life II scale. Data were analyzed using descriptive statistics, t-test, ANOVA, Scheff$\acute{e}$ test, and multiple regression (enter method). Results: The average score for awareness of death was $127.3{\pm}10.14$. This score is moderate not biased toward positive or negative. The average score for meaning of life was $130.3{\pm}9.42$ with 51% for loss steps, 45.5% for pursuit steps and 3.5% for discovery steps to the meaning of life. Factors affecting the meaning of life were religion, Buddhism (${\beta}=6.25$, p=.015) or Atheist (${\beta}=5.91$, p=.017), educational level, Master's or higher (${\beta}=16.22$, p=.003), work department, special department (${\beta}=3.49$, p=.017). Conclusions: Results of the study indicate a need to provide nursing programs that will promote nurses' spiritual and inner maturity.

• Journal of The Korean Digital Architecture Interior Association
• /
• v.6 no.2
• /
• pp.9-16
• /
• 2006

The research want to know about form creation method's special quality that found in digital construction design process that using digital media, and they comparison analysis that who positive using digital media, Frank O. Gehry, Peter Eisenman, Greg Lynn, UN studio's work. First, In digital design process using digital media is make full use to design unfolding step and application way can change by architect's recognition difference of using digital media and each architect's design general idea unfolding process, and it means form creation process can change. Second, In digital design process a building form doesn't design adaptation to construction system, they directly design the third dimension form. So, they deduction a new form that unification and integration. Third, the architect that appear's in digital design process's part is existing, data from position of the master which it selects the coding selects the outcome goods which appears in computer operation with coordinator role of the originality and construction sense which it is visible.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.48 no.4
• /
• pp.1-5
• /
• 2011

We present the implementation of MAC system for MBOA UWB SoC. The implemented MBOA MAC algorithm is not master control mechanism, but distributed network mechanism. Therefore, mesh network can be easily constructed because MAC consists of distributed network and administrates network. The ARM926EJ with cache is adopted for high performnace and AMBA bus is applied for system design and reuse. In addition, the system operating clock management algorithm is implemented for low power consumption. The dedicated DMA for MAC is designed between the system memory buffer and MAC hardware, and the dedicated DMA for USB 2.0 is also implemented between system memory buffer and host for high data transaction.