• 한국신재생에너지학회:학술대회논문집
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• 2010.11a
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• pp.114.1-114.1
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• 2010

A highly performed Pd-based hydrogen membrane has prepared successfully on a modified porous nickel support. The porous nickel support modified by impregnation method of $Al(NO_3)_3{\cdot}9H_2O$ (Aldrich Co.) over the nickel powder showed a strong resistance to hydrogen embrittlement and thermal stability. Plasma surface modification treatment was introduced as a pre-treatment process instead of conventional HCl wet activation. Ceramic barrier was coated on the external surface of the prepared nickel supports to prevent intermetallic diffusion and to enhance the affinity between the support and membrane. Palladium and copper were deposited at thicknesses of $4\mu}m$ and $0.5{\mu}m$, respectively, on a barrier-coated support by DC sputtering process. The permeation measurement was performed in pure hydrogen at $400^{\circ}C$. The single gas permeation of our membrane was two times higher than that of the previous membrane which do not have ceramic barrier.

• Bulletin of the Korean Chemical Society
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• v.25 no.11
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• pp.1667-1670
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• 2004

In DNA microarray produced by DNA-deposition technology, DNA-immobilization and -hybridization yields on a solid support are most important factors for its accuracy and sensitivity. We have developed a dendrimeric support using silylated aldehyde slides and polyamidoamine (PAMAM) dendrimers. An oligonucleotide array was prepared through a crosslinking between the dendrimeric support and an oligonucleotide. Both DNAimmobilization and -hybridization yields on the solid support increased by the modification with the dendrimers. The increase of the immobilization and hybridization efficiency seems to result from a threedimensional arrangement of the attached oligonucleotide. Therefore, our dendrimeric support may provide a simple and efficient solution to the preparation of DNA microarrays with high-density DNA-deposition and high hybridization efficiency.

• Journal of the Korean housing association
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• v.18 no.2
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• pp.49-58
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• 2007

Kitchen space is one of the most dangerous places for the elderly. Modifications of kitchen space for improving safety and independence for older residents are very important factor for aging in place. The purpose of this study was to identify the current situations and modifications of kitchen space by elderly-headed households. The sample included 108 respondents over the age 65 who consisted of elderly-couple or single person household with homeownership in Seoul. The data were analyzed by descriptive statistics. Based on the findings of the study, the present incidence and recognition of future need in kitchen modifications were identified. Changes made in kitchen space tended to be nonstructural or relatively inexpensive items. In conclusion, this study suggests several ideas for improving current physical problems of kitchen space to support safe and independent daily living of older residents.

• Research in Community and Public Health Nursing
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• v.11 no.2
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• pp.526-537
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• 2000

This study was conducted to contribute to the expansion of activity areas for school nurses in the field of health promotion services whose importance are increasing daily. To achieve such goals the researcher proposed that health promotion programs for obesity management in overweight schoolchildren conducted by literature review to apply to school settings. In this program, the principal components developed a behavior modification program and an exercise program, which could be educated and managed by a nursing staff during for 9 weeks, three times per week, 60 minutes each. The program consisted of exercise, health education. health counseling, and a direct nursing care. This kind of approach may support the need of behavior modification programs and exercise programs on a regular base via the social organization, which may mean an intentional change of life style. A comprehensive approach to health promotion services proposed by this research would contribute greatly to the effectiveness of school health services and to promote health in overweight schoolchildren.

• Nuclear Engineering and Technology
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• v.56 no.2
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• pp.410-418
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• 2024

Study of flow behavior within rod bundles has been an active topic. Surface modification technologies are important parts of the design of the fourth generation reactor, which can increase the strength of the secondary flow within the rod bundle lattices. Quasi-periodic large-scale vortex structure (QLVS) is introduced by arranging micro ribs on the surface of rod bundles, which enhanced the scale of the secondary flow between the rod bundle lattices. Using computational fluid dynamics (CFD) and water experiments, the flow field distribution and drag coefficient of the rod-bundle lattices are studied. The secondary flow between the micro-ribbed rod-bundle lattice is significantly enhanced compared to the standard rod-bundle lattice. The numerical simulation results agree well with the experimental results.

• Journal of Korean Academy of Nursing
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• v.35 no.3
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• pp.611-620
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• 2005

Purpose: The purpose of this study was to identify the effects of a school-based obesity control program based on behavior modification and self-efficacy for obese elementary school children. The program was composed of strategies to modify diet and exercise habits and to increase self-efficacy. Method: The subjects were 57 obese children (experimental group = 28, control group = 29) whose Rohler index was 150 and over. The program was implemented once a week for 12 weeks from September 16 to December 12, 2003. The data was analyzed by Fisher's exact probability, $x^2$-test, t-test, and Wilcoxon Rank Sum test. Result: The Rohler index, fat mass and lean body mass of the experimental group positively changed after the intervention more than those of the control group, but there was a significant difference in the Rohler index only (t=2.06, p=.045). In addition, obesity stress significantly decreased (z=-2.86, p=.047) and dietary self-efficacy significantly increased (t=2.35, p=.023) in the experimental group than those of the control group. Conclusion: This study supports that a school-based obesity control program based on behavior modification and self-efficacy can be effective in decreasing obesity stress and increasing dietary self-efficacy. Parents, school nurses and the other support groups should be encouraged to participate from the planning stage of the program to be effective in weight control of obese elementary school children. Also school-based program should be implemented as an essential course in the curriculum, not as an elective.

• The Journal of the Korea Contents Association
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• v.15 no.3
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• pp.280-289
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• 2015

Purpose: The purpose of the study was to investigate the difference of health behavior modification between male and female patients with cardiovascular disease; and to compare the predictors of health behavior between the male and female subjects. Methods: A comparative study design was used in the study. A total of 228 patients(male 114, female 114) with cardiovascular disease were recruited from outpatients clinics in 2 university hospitals in Korea. Data were analyzed using t-test, $X^2$, ANOVA, ANCOVA, Pearson correlation, and multiple regression with SPSS 20.0. Results: There was significant difference of health behavior between male and female patients with cardiovascular disease (F=9.45, p=0.002). The significant predictors of health behavior among male subjects were self-efficacy, perceived barriers, perceived susceptibility, medical support and autonomous motivation, accounting for 45%; the significant predictors of health behavior among female subjects were self-efficacy, medical support and autonomous motivation, accounting for 51%. Conclusions: It is suggested to take different health promotions strategies to maintain the performance of health behaviors among male and female patients with cardiovascular diseases.

• The Journal of the Acoustical Society of Korea
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• v.27 no.2
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• pp.75-79
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• 2008

In this paper, we propose a novel speech enhancement technique using global soft decision (GSD) based on the probabilistic outputs of support vector machine (SVM). Generally, speech enhancement algorithms applied soft decision gain modification and noise power estimation have bettor performance than those employing hard decision. Especially, global speech absence probability (GSAP), which is known as an effective measure of the speech absence in each frame, has been adopted to SD-based speech enhancement methods. For this reason, we introduce a new GSAP estimated from the probabilistic output of SVM using sigmoid function. The performance of the proposed algorithm is evaluated by the PESQ and MOS test under various noise environments and yields better results compared with the conventional GSD scheme.

• Journal of Engineering Education Research
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• v.15 no.4
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• pp.94-100
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• 2012

The needs for enhancing creativity in engineering design education continue to increase. Recent studies about a learning environment and learning support tools provide some new possibilities. The education of creative thinking however must begin from the change of attitude of students to creativity. The experimental results and some lessons for modification of systematic engineering design methodology to creative were reported from the course 'engineering design'.

• ETRI Journal
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• v.30 no.4
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• pp.565-575
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• 2008

As networks increase and cross-convergence occurs between various types of devices and communications, there is an increasing demand for interoperable service in the business environment and from end users. In this paper, we investigate interoperability issues in the digital rights management (DRM) and present a practical framework to support interoperability in environments with multiple devices. The proposed architecture enables end users to consume digital content on all their devices without awareness of the underlying DRM schemes or technologies. It also enables DRM service providers to achieve interoperability without costly modification of their DRM schemes.