• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.606-616
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• 2015

This study was conducted in order to identify factors affecting opinions on marriage of unmarried women in their 30's in Korea. Analysis of data on 529 unmarried women in their 30's, which were taken from the 2012 social survey, was analyzed. Data were analyzed using ${\chi}^2$ test, hierarchical logistic regression analysis as well as descriptive statistics by SPSS version 20.0. Results showed that age(Exp(b)=.90,p=.025), opinions on divorce(Exp(b)=3.81,p<.001) and remarriage(Exp(b)=3.09,p=.001), and value on marriage(Exp(b)=.80,p<.001) were independent predictors of opinions on marriage. Economic activity(Exp(b)=19.58,p=.003) was found to be an independent predictor of opinions on marriage for the 35-39 year old women differ from 30-34 year old women predictors. Findings of this study indicate a need for developing family and marriage value-centered education and the low-fertility policy for the 35-39year old actively working women considering factors affecting opinions on marriage.

• The Journal of Korean Academic Society of Nursing Education
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• v.19 no.4
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• pp.606-616
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• 2013

Purpose: The purpose of this study was to investigate the effect of critical thinking disposition on emotional regulation, perceived stress and communication competence of students in nursing. Methods: A total of 362 students were recruited from two nursing colleges in C and S city. Data were collected by means of self reported questionnaires from December 1 to 15, 2012 and analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients and multiple regression with SPSS 18.0. Results: A positive correlation was found between critical thinking disposition and seeking support emotional regulation, active emotional regulation and communication competence. A negative correlation was found between critical thinking disposition and perceived stress. Critical thinking disposition was the strongest predictor of seeking support emotional regulation, active emotional regulation, perceived stress and communication competence. Conclusion: The results of this study suggest that to enhance positive emotional regulation and communication competence and to reduce stress for nursing students, it is necessary to develop a teaching program and curriculum for increasing critical thinking disposition.

• Polymer(Korea)
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• v.36 no.5
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• pp.606-611
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• 2012

Polyetherimide (PEI) and poly(vinylidene fluoride) (PVdF) blend web was prepared by electrospinning technique. In order to improve low mechanical properties, post processes like hot-pressing and heat-stretching were employed, and a study on the effects of post processes on their mechanical properties was performed. To confirm the physical properties of the web, scanning electron microscopy and tensile measuring instrument were used. The mechanical strength of webs pressed in the ratios of 1/2, 1/3, 1/4 and 1/5 at $180^{\circ}C$ were improved four-to-five times compared to pristine webs. Also they showed an additional increase by 2~8MPa, by heat-stretching 30 to 40% at $220^{\circ}C$.

• Korean Journal of Soil Science and Fertilizer
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• v.46 no.6
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• pp.606-609
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• 2013

To investigate the effect of partial tillage seeding of hairy vetch on green manure biomass and rice yield, on-farm experiment was conducted at eco-friendly hairy vetch cultivation area located in Yesan-gun, Chungcheongnam-do. Seeding methods of hairy vetch consisted of partial tillage seeding (PTS) and broadcasting before rice harvesting (BBRH). Hairy vetch was incorporated into soil on May 18 and rice seedling was transplanted on May 26. The growths of hairy vetch before overwintering were investigated on November 11. Plant height of BBRH plot was longer than that of PTS plot, but somewhat larger number of seedling stand was found in PTS. Biomass and N production of hairy vetch were investigated on May 18. Results of the investigation showed no difference between two seeding methods. Although the seeding time was 21 days late in PTS, the biomass of hairy vetch and rice yield were equivalent to those of BBRH seeding, so we conclude that PTS could improve overwintering survival of hairy vetch in rice cropping system.

• Nutrition Research and Practice
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• v.14 no.6
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• pp.606-620
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• 2020

BACKGROUND/OBJECTIVES: Although some juices affect subjective sleep quality, there is a lack of information on the effect of a specific juice on objective sleep quality and heart rate variability (HRV) during sleep; thus the present study investigated whether a blended juice made from natural extracts influenced sleep quality and HRV during sleep in adults with disturbed sleep. SUBJECTS/METHODS: A randomized, crossover study was conducted on twenty-five adults (15/10, female/male) complaining of difficulty initiating or maintaining nighttime sleep (Pittsburgh sleep quality index [PSQI] ≥ 5). During feeding sessions (FS), subjects received sleep-inducing juice made of natural ingredients (250 mL/trial) twice a day for 8 weeks or non-FS (N-FS) for 8 weeks while maintaining normal activities. Sleep quality and parameters were recorded via wearable actigraph for 7 consecutive days, and PSQI scores were assessed before and after the intervention. HRV was also monitored at rest and during sleep. RESULTS: After receiving the sleep-inducing juice intervention (FS), PSQI scores were significantly decreased (P < 0.001) and correlated with a significant decline in fatigue severity scale and visual analogue scale levels (P < 0.05; both). HRV indices of vagal activity were significantly improved during FS (P < 0.05), and no significant differences in N-FS were observed. Sleep efficiency and total sleep time increased significantly (P < 0.05) and sleep latency, total counts, sleep fragmentation index, and movement index, decreased significantly (P < 0.05, all 4) during FS, with no significant differences-observed during N-FS. CONCLUSIONS: This study results demonstrated that an 8-week course of sleep-inducing juice has led to improve sleep quality, suggesting an enhanced cardiac vagal tone during sleep. Thus, it could be a well-tolerated option for adults with disturbed sleep.

• The Journal of the Korea Contents Association
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• v.10 no.10
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• pp.351-358
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• 2010

This study is to examine the effect of types of mentoring among security agents on career development and career satisfaction. Private guards engaging in 5 different security companies in Seoul 2010" were set as a collected group and using judgment sampling method, 227 of them were finally analyzed. Cronbach's $\alpha$ value was .606, implying that reliability of questionnaire was high. The conclusion drawn from this study is as follows: First, types of mentoing among private guards effect their career development. In other words, when facilitated mentoring is encouraged, it leads to innovative self-development, professional development, and information competitiveness; when informal mentoring is encouraged, it causes information competitiveness to be improved. Second, mentoring types have an effect on career satisfaction: Facilitated mentoring enables to increase career satisfaction. Third, security agents' career development affects their career satisfaction. That is, innovative development and professional development result in increase of career satisfaction.

• Journal of Convergence for Information Technology
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• v.12 no.5
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• pp.126-132
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• 2022

Wood Plastic Composite(WPC) has been mostly used for outdoor purposes such as deck materials and trails so far. In this study, WPC panels with improved antibacterial properties, total volatile organic compound emissions (TVOC), and flame retardant were manufactured to use Wood Plastic Compound as interior materials for indoor use. WPC compound was prepared by mixing Chamaecyparis obtusa wood flour with high density polyethylene(HDPE). The prepared WPC compound exhibited excellent antibacterial and antifungal properties, and the total volatile organic compound emission(TVOC) was 0.062 mg/m2·h. The WPC panel(303mm×606mm×10mm) manufactured by a twin screw extruder with the manufactured compound achieved the flame retardant grade 2 standard of KS F 2271.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.5
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• pp.1160-1167
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• 2013

Web based simulation service is utilized to computationally analyze various phenomena in real world according to the progress of network and computing technology. In this paper, we present an improvement and utilization of e-AIRS (e-Science Aerospace Integrated Research System). e-AIRS, has been utilized to support web based CFD simulation service since 2008. has some problems such as stable system, pre processing, post processing. To solver this problem, we improved e-AIRS such as distributed service processing, personal simulation job assignment control, and faster data loading. After improvement, although users increase from 110 to 606, the priority of user requirements is changed from stable system to pre/post processor. User requirements and statistics about e-AIRS simulation service for each semester is analyzed to support more stable and comfortable service.

• Korean Journal of Soil Science and Fertilizer
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• v.50 no.6
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• pp.606-614
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• 2017

Amount of food waste has been increased annually in Korea and re-use of food waste as a fertilizer or soil amendment in agricultural field has been studied. Therefore, main purpose of this research was to determine optimum condition of hydrolysis for food waste management. Three different solvents, HCl, $H_2SO_4$, and KOH, were used and varied concentration at the range of 10~30% and hydrolysis time at the range of 1~3 hours were evaluated. In general, reduction rate of food waste was increased when concentration of solvent and hydrolysis time was increased except when KOH was used. Among different solvents, concentration, and hydrolysis time, the highest reduction rate (97.79%) was observed when 30% of HCl was used with temperature of $140^{\circ}C$ at 2 hours of hydrolysis time. In addition, neutralization effect of alkalic materials, shell waste (SW) and egg shell (ES) was evaluated. Both SW and ES increased pH of finished acid hydrolysis solution up to 7.61 indicating that neutralization effect of SW and ES was sufficient for finished acid hydrolysis solution. Contents of organic matter was also at the range of 10.7~13.04% and 5.53~8.04% respectively when HCl and $H_2SO_4$ were used as solvent. Overall, hydrolysis technique can be used to manage food waste with selected optimum condition in this study and characteristics of finished hydrolysis solution after neutralization might be suitable for soil amendments.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.8
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• pp.606-616
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• 2011

The objectives of this study were to evaluate the applicability of adsorption models for adsorption properties of adsorbents. For this study, adsorption experiment of $NO_3^-$ ion using anion exchange resin has been investigated under adsorption equilibrium and kinetic in bach process. Adsorption equilibrium experiment were carried out that two conditions is change of adsorbate concentration and change of adsorbent weight. Experiment results have been analyzed by adsorption isotherm models, energy models and kinetic models. Under the condition of change of adsorbate concentration was best described by Sips and Redlich-Perterson isotherm models. However case of change of adsorbent weight was described by Langmuir isotherm models. It seems reasonable to assume that isotherm model was dominated by multiple mechanism according to experiment condition.