• 한국초전도학회:학술대회논문집
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• v.10
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• pp.128-131
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• 2000

We report high pressure synthesis of electron doped infinite layer superconductor Sr$_{0.9}$La$_{0.1}$CuO$_2$. Structural and low-field magnetization study demonstrated that the superconducting quality of our samples were best among all kind of bulk samples reported until now. With these good samples, many new findings are under going by our collaborators and us.

• Progress in Superconductivity
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• v.4 no.1
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• pp.32-36
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• 2002

We have measured the Hall effect in infinite-layer Sr／sub 0.9／La／sub 0.1／$CuO_2$ thin films grown by molecular beam epitaxy. We do not observe $T^{2}$ dependence of the cotangent of Hall angle, which is commonly observed in other cuprate High-Tc superconductors. Therefore, this result cannot be interpreted within two different scattering mechanism based on charge-spin separation theory. The mixed-state Hall effect shows no sign anomaly, implying that tile hydrodynamic contribution of vortex core is negligibly small.

• Research in Mathematical Education
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• v.7 no.3
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• pp.163-189
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• 2003

The purpose of this study is to develop a test, which can be used in creative problem solving ability in mathematics of the mathematically gifted and the regular students. This test tool is composed of three categories; fluency (number of responses), flexibility (number of different kinds of responses), and originality (degree of uniqueness of responses) which are the factors of the creativity. After applying to 462 middle school students, this test was analyzed into item analysis. As a results of item analysis, it turned out to be meaningful (reliability: 0.80, validity: item 1(1.05), item 2(1.10), item 3(0.85), item 4(0.90), item 5(1.08), item difficulty: item 1(-0.22), item 2(-0.41), item 3(0.23), item 4(0.40), item 5(-0.01), item discriminating power: item 1(0.73), item 2(0.73), item 3(0.67), item 4(0.51), item 5(0.56), over the level of a standard basis. This means that the test tool was useful in the test process of creative problem solving ability in mathematics

• 한국초전도학회:학술대회논문집
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• v.10
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• pp.125-127
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• 2000

We report high pressure synthesis of Sr$_{0.9}$Sm$_{0.1}$CuO$_2$. Powder x-ray diffraction showed that the synthesized compounds have infinite layer structure as a major component. Slow heating at the first stage of heating processes after pressurization resulted in several larger grains. The largest grain was found to have the longest edge length of about 100 micrometer. Through magnetic property measurement in superconducting state, we found that pinning in this compound has substantial difference from that of La doped infinite layer, which has no unpaired spin at Sr site.

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.35-35
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• 2002

• Journal of Korean Academy of Nursing Administration
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• v.19 no.2
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• pp.273-281
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• 2013

Purpose: The purpose of this study was to identify the relationship among cognitive style, creative action, and challenging work and then determine whether challenging work has a mediating effect between cognitive style and creative action. Methods: Data were collected from a convenience sample of 275 clinical nurses who graduated from 3-year nursing schools and worked in hospitals in Seoul or Kyungki Province. The questionnaire included measurements of cognitive style, creative action and challenging work. Data were analyzed using descriptive statistics, correlation, T-test, ANOVA, Duncan test, and hierarchical multiple regression. Results: Mean scores for cognitive style, creative style, and challenging work were $3.28{\pm}0.42$, $3.22{\pm}0.57$, $3.40{\pm}0.63$, respectively. Significant correlations were found between cognitive style and challenging work, cognitive style and creative action, and challenging work and creative action. Cognitive style was significantly different according to years in clinical career, and in hospital size. Challenging work was significantly different according to age and position. Creative action was significantly different according to years in clinical career. Finally challenging work had a mediating effect between cognitive style and creative action. Conclusion: Findings from this study provide a comprehensive understanding of challenging work for clinical nurses and indicate related factors and importance.

• Progress in Superconductivity
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• v.3 no.1
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• pp.23-27
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• 2001

We have investigated the mixed-state magnetoresistance of high quality c-axis-oriented MgB2 thin film for magnetic field from 0.5 T to 5.0 T, applied normal to ab-plane. The temperature dependence of magnetoresistance was well described by vortex glass and fluctuation theories for different temperature regimes. We observed glassy exponent of v(z-1)~3 and upper critical field of $H_{c2}$(0)~35 T, which is consistent with previous data obtained from direct $H_{c2}$(0) measurements. Interestingly, the thermally activated flux flow region was observed to be very narrow, suggesting that the pinning strength of this compound is very strong. This finding is closely related to the recent reports that the bulk pinning is dominant in $MgB_2$and the critical current density of $MgB_2$ thin film is very high, comparable to that of cuprate superconductor. The present results further suggest that $MgB_2$is beneficial to technical applications.ons.

• Journal of Korea Entertainment Industry Association
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• v.13 no.2
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• pp.219-229
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• 2019

The purpose of this study was to investigate the effects of internal and external motivation and self -efficacy on the development of creative leadership as a collective of self-leadership, servant leadership and problem-solving leadership. For the study, Amabile's work preference, self-efficacy test, and creative leadership test were conducted in 195 nursing students at G city. Correlation analysis and regression analysis were conducted through SPSS24.0 program. First, creative leadership showed a significant positive correlation with internal motivation and self-efficacy. Second, multiple regression analysis was conducted focusing on factors showing significant differences in correlation. As a result, self-efficacy and intrinsic motivation were the factors influencing creative leadership. There was 60% explanatory force. It is necessary to improve self-efficacy and intrinsic motivation in order to improve creative leadership.

• Fashion & Textile Research Journal
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• v.22 no.2
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• pp.149-157
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• 2020

The current study tests the effect of fashion product knowledge and confidence in fashion coordination on innovative fashion product acceptance, mediated by creative fashion consumer efficacy. Creative fashion consumer efficacy refers to a consumers' belief in the ability to consume fashion products in a creative way. The survey was conducted on 474 people between 20 and 40 years of age in a panel of online survey firms. Data was analyzed using reliability analysis and frequency analysis by SPSS 20.0 along with confirmatory factor analysis and structural equation modeling done by AMOS 20.0. The results reveal that creative fashion consumer efficacy consists of original thinking efficacy, usage expansion efficacy, problem solving efficacy, and method variation efficacy that is consistent with the original structure of creative consumption efficacy. In addition, fashion product knowledge and confidence in fashion coordination do not affect innovative fashion product acceptance. The effects of fashion product knowledge and confidence in fashion coordination on innovative fashion product acceptance are fully mediated through creative fashion consumer efficacy. The results of this study demonstrate that people who are knowledgeable, confident and associated with fashion product consumption can have a high level of creative fashion consumer efficacy that increases innovative fashion product acceptance.

• 한국초전도학회:학술대회논문집
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• v.10
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• pp.1-1
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• 2000

The infinite layer compound $ACuO_2$, (A-Alkaline earth) consists of infinite stacking of $CuO_2$ planes separated only by alkaline earth ions. This compound attracted much attention because it contains only key ingredient of all cuprate high temperature superconductor; $CuO_2$ plane with controllable carrier concentration without charge reservoir block. High pressure synthesis method has been found to be preferable for this system due to its ability of doping various lanthanide ion into A site with larger superconducting volume fraction. But rigorous study on this rudimentary compound has been hindered by insufficient quality of sample. Especially superconductlng volume fraction was often too small to identify its origin. In this presentation, we report high pressure synthesis of $Sr_{0.9}Ln_{0.1}CuO_2$ (Ln=La, Sm). By controlling the heating temperature precisely during high pressure synthesis we could have superconductors with quite high superconducting volume fraction for this compound. The magnetic properties of the graln aligned samples show very different behavior compared to the cuprate high temperature superconductors. Details will be discussed.