• Journal of Power System Engineering
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• v.21 no.2
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• pp.70-76
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• 2017

When Timoshenko arcs considering the shear deformation and rotatory inertia have elastic supports, the authors analyze in-plane free vibration of them by the transfer influence coefficient method. This method finds the natural frequencies of them using the transfer of influence coefficient after obtaining the transfer matrix of arc element from numerical integration of the differential equations governing the vibration of arc. In this study, two computer programs were made by the transfer influence coefficient method and the transfer matrix method for analyzing free vibration of Timoshenko arcs. From numerical results of four computational models, we confirmed that the transfer influence coefficient method is a reliable method when analyzing the free vibration of Timoshenko arcs. In particular, the transfer influence coefficient method is a effective method when analyzing the free vibration of arcs with rigid supports.

• Korean Institute of Interior Design Journal
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• v.24 no.3
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• pp.48-58
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• 2015

This study is to conclude a direction for Information Commons, which supports the university library in a new role. The study explains perspectives on the changing role of the university library by examining the approaches, histories, and theories practiced by various researchers on Information Commons. The study aims to discover ways of improving the library space that are dedicated to technology using Information Commons, it also examines ways of creating a unified "library space" that will support learning and access to knowledge and information. The features of Cultural Commons include making improvements to technology-centered space, and providing support to research, freedom of speech, creative approach, public freedom and collaboration, and interaction. The functions of Cultural Commons within the university library are listed: First, it supports programs that will transform the library into a social hub within the university. The space specifically blurs the boundary between the library building and its surroundings, and unifies these spaces to enhance its catalytic role in aiding social interactions and human-centered approach. Second, it supports active participation through cultural programs and provides a fluid and interactive space with virtual resources. Third, it enhances user experience to supports behaviors and activities that involve fixtures and equipment in the space to promote learning. The study notes that, with the emergence of these characteristics, the university library is changing by implementing Cultural Commons for on-campus social space and new learning. Accordingly, this implementation is expected to enhance active acceptance of the library space in the future.

• Journal of Korean Home Economics Education Association
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• v.28 no.4
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• pp.45-59
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• 2016

The purpose of this study was to examine the mediating effects of social supports on the relationship between child-rearing burden and psychological well-being among grandmothers. Data was collected from 249 grandmothers raising preschooler grandchildren who live in Gwangju by self-reported questionnaires. The method used for data analysis was structural equation modeling analysis using SPSS 22.0 and Amos 22.0. The results of this study revealed that child-rearing burden influenced social supports of grandmothers. Social supports influenced psychological well-being of grandmothers. Child-rearing burden influenced psychological well-being of grandmothers. The structural equation modeling analysis indicated that social supports partially mediated the relationship between child-rearing burden and psychological well-being.

• Korean Journal of Materials Research
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• v.30 no.1
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• pp.14-21
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• 2020

Carbon supports for dispersed platinum (Pt) electrocatalysts in direct methanol fuel cells (DMFCs) are being continuously developed to improve electrochemical performance and catalyst stability. However, carbon supports still require solutions to reduce costs and improve catalyst efficiency. In this study, we prepare well-dispersed Pt electrocatalysts by introducing titanium dioxide (TiO₂) into biomass based nitrogen-doped carbon supports. In order to obtain optimized electrochemical performance, different amounts of TiO₂ component are controlled by three types (Pt/TNC-2 wt%, Pt/TNC-4 wt%, and Pt/TNC-6 wt%). Especially, the anodic current density of Pt/TNC-4 wt% is 707.0 mA g^-1_pt, which is about 1.65 times higher than that of commercial Pt/C (429.1 mA g^-1_pt); Pt/TNC-4wt% also exhibits excellent catalytic stability, with a retention rate of 91 %. This novel support provides electrochemical performance improvement including several advantages of improved anodic current density and catalyst stability due to the well-dispersed Pt nanoparticles on the support by the introduction of TiO₂ component and nitrogen doping in carbon. Therefore, Pt/TNC-4 wt% may be electrocatalyst a promising catalyst as an anode for high-performance DMFCs.

• Journal of Home Health Care Nursing
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• v.23 no.2
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• pp.195-205
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• 2016

Purpose: The aims of this study were to describe the levels of personal coping resources, perceived organizational supports, and job stress, and to examine factors that affect job stress in hospital-based home care nurse practitioners. Methods: A cross-sectional survey was conducted. Data were collected from 170 subjects with a structured questionnaire from April to July, 2016 and analyzed using descriptive statistics, t-tests, One-way ANOVA, Pearson's correlation, and multiple regressions. Results: The means for personal coping resources, perceived organizational supports, and job stress were $3.7{\pm}0.43$, $3.4{\pm}0.55$, and $3.4{\pm}0.55$ out of 5, respectively. Personal coping resources and perceived organizational supports were significantly correlated. However, both had no associations with job stress. In the multiple regression analysis, the experiences of home care nursing and hospital location were found to be predictors of job stress. Both personal coping resources and perceived organizational supports were not statistically significant predictors of job stress. Conclusions: It is necessary to carry out organization-based educational programs and support systems aimed at enhancing personal abilities to cope with stress at work. Additionally, further studies are needed to identify other hospital-related characteristics that can lead to job stress in home care nurse practitioners.

• Korean Journal of Family Social Work
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• no.61
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• pp.35-57
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• 2018

This study explores how married migrant women in Korea create social capital in their everyday lives, and how their social capital influences cultural acculturation. This study performs a structural equation model, using two-year data of female migrant women. The results suggest that network elements, including official supports from public organizations and unofficial supports from personal ties, contribute to creation of perceptual elements, including social trust, community involvement and relations. Also, these two elements of social capital have positive impact on acculturation of married migrant women in Korea. The longitudinal analysis provides a basic understanding of the creation of social capital and the relationship between social capital and acculturation of married migrant women and also clearly suggests the importance of public supports rather than personal supports from family or friends.

• Journal of Hydrogen and New Energy
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• v.25 no.6
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• pp.577-585
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• 2014

Nanorod and particle shape $CeO_2$ were synthesized via hydrothermal process and precipitation method, respectively, and used as supports of Pt catalyst for water gas shift (WGS) reaction. Three different durations (12, 48, and 96h) for hydrothermal process were applied for the preparation of nanorod type $CeO_2$. 1.0 wt% of Pt was loaded on the prepared supports with incipient wetness method prior to the catalytic activity tests that were carried out at a GHSV of $95,541h^{-1}$, and a temperature range of 200 to $360^{\circ}C$. Varying duration of hydrothermal process led to the difference in physical characteristics of $CeO_2$ nanorods, such as aspect ratio, BET surface area, pore diameter, and pore volume. Consequently, the catalytic activities of Pt/$CeO_2$ nanorods were affected by the physical characteristics of the supports and appeared to be in the order of Pt/$CeO_2$(12) > Pt/$CeO_2$(48) > Pt/$CeO_2$(96). The comparison of the catalytic activities and results of the analysis (XPS, XRD, SEM, BET and TPR) for the supports revealed that the activity of the catalysts depends on chemical states of the Pt and the support materials in the temperature range that is lower than $280^{\circ}C$. However, the activity is rather dependent on the physical characteristic of the supports because the increased gas velocity limits the mass transfer of reactants in micropores of the supports.

• Bulletin of the Korean Chemical Society
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• v.8 no.3
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• pp.133-137
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• 1987

Polysiloxane SE-54 liquid phase was immobilized on the support surface as coated in thin film via in-situ cross-linking. The cross-linking between liquid molecules was initiated by dicumylperoxide. Among the supports investigated, only Chromosorb W provided the cross-linkable surface. The optimal in-situ cross-linking was achieved when Chromosorb W was coated with 5% (w/w) SE-54 and cross-linked with 1% (w/w) dicumylperoxide. The cross-linked support was useful for the trace analysis as well as for the trace enrichment.

• Journal of Hydrogen and New Energy
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• v.24 no.2
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• pp.142-149
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• 2013

Carbon materials are mainly used as catalyst supports for polymer exchange membrane fuel cell (PEMFC). Catalyst supports are required specific characteristics of the carbon materials, such as large surface area and high electrical conductivity. Attempted were to improve electrical conductivity and to maintain high surface area of carbon materials using a microwave treatment. Microwave treatment, as a relatively new technique, takes short reaction time and reduce the consumption of the gases used for carbon treatment compared to a traditional heat treatment. Hybrid carbon (ACF/Graphene) as catalyst supports by microwave-irradiation method for PEMFC increase the cell performance because of increased electrical conductivity resulting in triple-phase contact and reduced the interfacial resistance. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-Ray Diffraction (XRD) were employed to analyze carbon materials. The performance of microwave-treated carbon materials was evaluated by measuring current-voltage (I-V) characteristics and electrode impedance.

• Korean Journal of Social Welfare
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• v.61 no.1
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• pp.263-291
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• 2009

This study aims to explore the possible ways to establish the effective medical supports for the sexual violence victims(svv). Using the data collected from 83 male and female doctors who are interested or involved in providing medical services for the victims, the doctors' attitudes toward the victims, medical services provided, and their needs for the possible medical supports were investigated. For comparison, 3 different groups of doctors were presented. The doctors who had treated svv(type1) seemed to have a difficulty in receiving the fee for the treatment of svv, and to have higher needs for the spermatic(fluid) test as well as the diverse supports for the testimony in courts. The doctors who had no experience of treatment, but were supposed to treat svv(type2) seemed to have negative attitudes toward the victims, and expect more difficulties in treating svv. The doctors of type2 had lower needs for the support for the specialized medical services and assessment of the sexual assault, but higher needs for the testimony supports. The doctors who had no experience of treatment, and were not supposed to treat svv(type3) appeared to have less negative attitudes toward the victims, but more knowledge of law and the community organizations for svv. The type3 doctors seemed to have higher needs for the supports for the specialized medical services, assessment for the sexual assault, and testimony in the courts. Based on the findings, the intervention strategies to create a new effective medical support system for the sexual violence victims were suggested.