• Communications of the Korean Mathematical Society
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• v.35 no.1
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• pp.185-199
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• 2020

In this paper, we introduce the definitions of s_p-convergent sequence in fuzzy metric spaces and fuzzy normed spaces. We investigate relations of convergence, s_p-convergence, s_∞-convergence and st-convergence in fuzzy metric spaces and fuzzy normed spaces. We also study s_p-convergence, s_∞-convergence and st-convergence using the sub-sequence of convergent sequence in fuzzy metric spaces and fuzzy normed spaces. Stationary fuzzy normed spaces are defined and investigated. We finally define s_p-closed sets, s_∞-closed sets and st-closed sets in fuzzy metric spaces and fuzzy normed spaces and investigate relations of them.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.451-451
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• 2012

Instead of a highly toxic CdSe and ZnScore-shell,InP/ZnSecore-shell quantum dots [1,2] were investigated as an active material for quantum dot light emitting diode (QD-LED). In this paper, aquantum dot light-emitting diode (QDLED), consisting of a InP/ZnS core-shell type materials, with the device structure of glass/indium-tin-oxide (ITO)/PEDOT:PSS/Poly-TPD/InP-ZnS core-shell quantum dot/Cesium carbonate(CsCO3)/Al was fabricated through a simple spin coating technique. The resulting InP/ZnS core-shell QDs, emitting near blue green wavelength, were more efficient than the above CdSe QDs, and their luminescent properties were comparable to those of CdSe QDs.Thebrightness ofInP/ZnS QDLED was maximumof 179cd/m2.

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.147-152
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• 2017

This study was attempted to grasp the convergence relationship between nurse 's communication ability, emotional labor and organizational commitment. For this purpose, 106 nurses working at university hospitals were collected from August 1, 2016 to August 15, 2016. Communication skills were measured by Kim & Woo 's communication ability measurement tool, emotional labor was measured by Morris & Feldman' s tool, and organizational commitment was developed by Mowday et al. Data were analyzed by t-test, ANOVA, and Pearson's correlation. The results showed that the communication ability differed according to age (F = 5.78, p = 0.004), marital status (t = -4.06, p <0.001) and position (t = -5.35, p <0.001). There was a statistically significant correlation between communication ability and organizational commitment (r = 0.293, p = 0.002). This result suggests a convergence implication on the provision of basic data to improve organizational commitment of nurses in nursing practice field.

• ETRI Journal
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• v.31 no.6
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• pp.749-754
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• 2009

The design and performance of an InGaAs/InP transimpedance amplifier and post amplifier for 40 Gb/s receiver applications are presented. We fabricated the 40 Gb/s transimpedance amplifier and post amplifier using InGaAs/InP heterojunction bipolar transistor (HBT) technology. The developed InGaAs/InP HBTs show a cut-off frequency ($f_T$) of 129 GHz and a maximum oscillation frequency ($f_{max}$) of 175 GHz. The developed transimpedance amplifier provides a bandwidth of 33.5 GHz and a gain of 40.1 $dB{\Omega}$. A 40 Gb/s data clean eye with 146 mV amplitude of the transimpedance amplifier module is achieved. The fabricated post amplifier demonstrates a very wide bandwidth of 36 GHz and a gain of 20.2 dB. The post-amplifier module was fabricated using a Teflon PCB substrate and shows a good eye opening and an output voltage swing above 520 mV.

• Journal of the Korean Mathematical Society
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• v.55 no.6
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• pp.1529-1540
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• 2018

The matrix equation $X^p+A^*XA=Q$ has been studied to find the positive definite solution in several researches. In this paper, we consider fixed-point iteration and Newton's method for finding the matrix p-th root. From these two considerations, we will use the Newton-Schulz algorithm (N.S.A). We will show the residual relation and the local convergence of the fixed-point iteration. The local convergence guarantees the convergence of N.S.A. We also show numerical experiments and easily check that the N.S. algorithm reduce the CPU-time significantly.

• Kyungpook Mathematical Journal
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• v.58 no.1
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• pp.91-103
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• 2018

In this paper, we generalize the concept of deferred density to that of deferred f-density, where f is an unbounded modulus and introduce a new non-matrix convergence method, namely deferred f-statistical convergence or $S^f_{p,q}$-convergence. Apart from studying the $K{\ddot{o}}the$-Toeplitz duals of $S^f_{p,q}$, the space of deferred f-statistically convergent sequences, a decomposition theorem is also established. We also introduce a notion of strongly deferred $Ces{\grave{a}}ro$ summable sequences defined by modulus f and investigate the relationship between deferred f-statistical convergence and strongly deferred $Ces{\grave{a}}ro$ summable sequences defined by f.

• Journal of the Korea Convergence Society
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• v.9 no.2
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• pp.371-380
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• 2018

The purpose of this study was to investigate the effects of patient controlled analgesia(PCA) convergence education on postoperative pain management in spinal surgery patients. Sixty spinal surgery patients were included. For the experimental group(n=30), PCA education using video, booklet, and a PCA model practice was provided before surgery. The data were collected using questionnaire and were analyzed using descriptive statistics, ${\chi}^2-test$, Fisher's exact test, t-test and repeated measures ANOVA. PCA knowledge-attitude, PCA satisfaction and pain control satisfaction were higher in the experimental group than the control group(p<.001; p=.001; p<.001). Postoperative pain and frequency of additional analgesia use of the experimental group were significantly lower than those of the control group(p<.001; p=.001). This findings showed that the convergence PCA education of audiovisual aids with PCA practice training could be effective pain management intervention in patients undergoing spinal surgery. These apply to development of convergence nursing interventions in clinical practice.

• Journal of applied mathematics & informatics
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• v.32 no.1_2
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• pp.55-60
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• 2014

In this paper, we will obtain Marcinkiewicz's type limit laws for fuzzy random sets as follows : Let {$X_n{\mid}n{\geq}1$} be a sequence of independent identically distributed fuzzy random sets and $E{\parallel}X_i{\parallel}^r_{{\rho_p}}$ < ${\infty}$ with $1{\leq}r{\leq}2$. Then the following are equivalent: $S_n/n^{\frac{1}{r}}{\rightarrow}{\tilde{0}}$ a.s. in the metric ${\rho}_p$ if and only if $S_n/n^{\frac{1}{r}}{\rightarrow}{\tilde{0}}$ in probability in the metric ${\rho}_p$ if and only if $S_n/n^{\frac{1}{r}}{\rightarrow}{\tilde{0}}$ in $L_1$ if and only if $S_n/n^{\frac{1}{r}}{\rightarrow}{\tilde{0}}$ in $L_r$ where $S_n={\Sigma}^n_{i=1}\;X_i$.

• Journal of Convergence for Information Technology
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• v.8 no.1
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• pp.69-77
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• 2018

This study is to find the convergence effect of a husband's help on self-efficacy and postpartum depression in mother. Each husband did mother and baby care until postpartum 6th week after completing three sessions of education. The data was collected in the 1st and 6th week postpartum, and analyzed using SPSS 20.0. Husbands's practice rate was 80%. Factors affecting to mothers' self-efficacy were parity, antepartum admission and husband's job, and to their postpartum depression were mothers' education, monthly income and antepartum depression. Prevalence of postpartum depression in the 1st and 6th week were 33.3% and 1.7% each. There were significant differences in increasing self-efficacy and in decreasing postpartum depression(p<.001), and there was a negative correlation between two variables(r=-.62, p=.01). Husbands' help brought convergence effects on increasing mothers' self-efficacy and decreasing postpartum depression(p<.001). This results could be used in developing intervention programs in managing mothers' self-efficacy and postpartum depression after repeated studies with wider range of subjects.

• Journal of the Korea Convergence Society
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• v.6 no.4
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• pp.177-186
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• 2015

The present study analyzes the main factor having an effect on the convergence dental hygienist's self-esteem through the survey to them. A self-leadership and professional self-conception show meaningful result with higher score in the group with higher self-respect than that of lower one(p<.001). Also the higher hygienist's self-esteem, the higher clinic practice ability(p<.01). There is negative correlation with self-esteem in emotional labor(p<.01) and exhaustion(p<.01). However, the positive correlations are presented in self-leadership(p<.01), professional self-conception(p<.01) and clinic practice ability(p<.01) with self-respect. The factors influenced on self-esteem are clinic practice ability(p<.05) and exhaustion(p<.01). In results, the organized convergence program and education considering self-esteem in the hospital should be accomplished systemically to enhance the clinic practice ability of each hygienist.