• Communications of the Korean Mathematical Society
• /
• v.37 no.2
• /
• pp.445-454
• /
• 2022

Using the concept of the strong differential subordination introduced in [2], we find conditions on the functions θ, 𝜑, G, F such that the first order strong subordination θ(p(z)) + $\frac{G(\xi)}{\xi}$zp'(z)𝜑(p(z)) ≺≺ θ(q(z)) + F(z)q'(z)𝜑(q(z), implies p(z) ≺ q(z), where p(z), q(z) are analytic functions in the open unit disk 𝔻 with p(0) = q(0). Corollaries and examples of the main results are also considered, some of which extend and improve the results obtained in [1].

• Journal of the Korean Society of School Health
• /
• v.11 no.2
• /
• pp.229-241
• /
• 1998

Because sexual awareness is changing, I have tried to classify university students' attitudes toward sex. This study examined male and female university students and used a Q-method to measure these attitudes. Out of a total of 202, 33 statements were abstracted, and a P-sample of 1-7 parties consisting of 26 persons were studied. I Q-sorted the statements with a standard of 9 points for normal distribution and analyzed the data by means of a Principal Component Analysis with a Quan PC Program. According to the result of this research, university students' attitudes toward sex are divided into three types. Type 1 are called open-minded open: They may have a surgical abortion in case of an unexpected pregnancy and sexual intercourse occurs when a man and woman feel love for each other. They don't see sexual intercourse as a means reproduction nor virginal purity as unconditional. It is remarkable that these students regard sexual intercourse as a natural thing and sex as a basic desire of human beings. In short, they show an open-minded attitude toward sex. Type 2 are supporters of virginal purity; They regard virginal purity with great importance. They insist that both man and woman should be chaste but that sexual intercourse before marriage is unfavorable only to the woman. They do not believe in sexual intercourse without love and emphasize purity in sex education. Differen from type 1, they are very negative about surgical abortion. Type 3 experss love through sex. They belive that sexual intercourse makes a couple happy and a way to express their affection for each other. In other words, the relationship between man and woman is improved through sexual intercourse. They do not think of sexual intercourse in terms of childbirth.

• Progress in Superconductivity
• /
• v.1 no.1
• /
• pp.36-41
• /
• 1999

Methods for mode identification and accurate measurements of the unloaded Q ($Q_0$) of a dielectric-loaded $TE_{01{\delta}}$ mode cavity resonator with HTS endplates are proposed. A resonator with a sapphire rod and $YBa_2Cu_3O_{7-x}$(YBCO) endplates was prepared and its microwave properties were studied at temperatures above 30 K. The $TE_{01{\delta}}$ mode $Q_0$ of the resonator, designed to work as a tunable resonator with variations in the gap distance (s) between the sapphire rod and the top YBCO, was more than 1000000 at s = 0 mm and at 30 K with the resonant frequency of 19.56 GHz. The $TE_{01{\delta}}$ mode $Q_0$ decreases as s increases for s < 2 mm until mode couplings between the $TE_{01{\delta}}$ mode and other modes appeared at s = 2 mm. Significant dependence of the $TE_{01{\delta}}$ mode $Q_0$ on the input and output coupling constants was also observed. Applications of the open-ended $TE_{01{\delta}}$ mode cavity resonator for a tunable resonator with a very high Q as well as a characterization tool for the surface resistance measurements of HTS films are described.

• Bulletin of the Korean Mathematical Society
• /
• v.52 no.6
• /
• pp.1805-1818
• /
• 2015

In this article, we first consider a linear multiplier fractional q-differintegral operator and then use it to define new subclasses of p-valent analytic functions in the open unit disk U. An attempt has also been made to obtain two new q-integral operators and study their sufficient conditions on some classes of analytic functions. We also point out that the operators and classes presented here, being of general character, are easily reducible to yield many diverse new and known operators and function classes.

• Journal of Power Electronics
• /
• v.15 no.1
• /
• pp.1-9
• /
• 2015

This study presents a novel transformer isolated parallel connected quasi Z-source (qZ-source) full-bridge DC-DC converter that uses a coupled inductor in both the qZ-source network and output filter inductor. Unlike traditional voltage-fed or current-fed converters, the proposed converter can be open- and short-circuited without damaging switching devices. Therefore, the desired buck and boost functions can be achieved and converter reliability can be significantly improved. All the bulky inductors in the qZ-source network and output filter can also be minimized with the proposed inductor structures. A 4 kW prototype DC-DC converter is built and tested to verify the performance of the proposed converter.

• Proceedings of the KIEE Conference
• /
• 2004.11a
• /
• pp.153-156
• /
• 2004

An electric power efficiency of electrodeless fluorescent lamp has big relative property of gas in lamp, gas pressure, lamp formation, ingredients of magnetic substance and shape and action frequency etc. We used magnetic substance that open self examination material of electrodeless fluorescent lamp antenna. Ferrite that is used in this experiment was Mn-Zn type. We have examined resistance kind, impedance, Q-factor's frequency characteristic by ferrite. Impedance, resistance and capacitance did not show difference in start frequency 2.65 [MHz] but there was difference quantity. We could know Q-factor's difference according to material, and Q-factor's is important part of antenna design.

• BMB Reports
• /
• v.32 no.4
• /
• pp.399-404
• /
• 1999

2,3-Dihydroxybiphenyl 1,2-dioxygenase (2,3-DHBD), which catalyzes the ring meta-cleavage of 2,3-dihydroxybiphenyl, is encoded by the phnQ gene of biphenyl- and phenanthrene-degrading Pseudomonas sp. strain DJ77. We determined the nucleotide sequence of a DNA fragment of 1497 base pairs which included the phnQ gene. The fragment lncluded an open reading frame of 903 base pairs to accommodate the enzyme. The predicted amino acid sequence of the enzyme subunit consisted of 300 residues. In front of the gene, a sequence resembling an E. coli promoter was identified, which led to constitutive expression of the cloned gene in E. coli. The deduced amino acid sequence of the PhnQ enzyme exhibited 85.6% identity with that of the corresponding enzyme in Sphingomonas yanoikuyae Q1 (formerly S. paucimobilis Q1) and 22.1% identity with that of catechol 1,2,3-dioxygenase from the same DJ77 strain. PhnQ showed broader substrate preference than previously-cloned PhnE, catechol 2,3-dioxygenase. Ten amino acid residues, considered to be important for the role of extradiol dioxygenases, were conserved.

• Korean Journal of Childcare and Education
• /
• v.13 no.3
• /
• pp.55-81
• /
• 2017

Objective: The purpose of this study was to classify turnover intention of early childhood teachers. This study also analyzed the characteristics of each types of turnover intentions. The research questions were as follows: First, what are the types of turnover intention among early childhood teachers?. Second, what are the characteristics of the types of turnover intention among early childhood teachers?. Method: This study has adopted the Q methodology as a method. first, open surveys were conducted among 101 early childhood teachers and principals who work at kindergartens or child care centers along with literature research, followed by the establishment of Q samples(48 questions). Second, the Q sample was classified among the P sample and was comprised of 90 participants. Ninety early childhood teachers as P sample sorted the 48 Q statements. Results: The findings of this study were summarized as follows: First, the types of early childhood teacher's turnover intentions were identified as four-factors. Second, the characteristics of the four-types of turnover intention were interpreted as follows: 'The type of complex psychological conflict', 'The type of pursuit of social value', 'The type of dependence on organizational environment', 'The type of realistic self-development'. Conclusion/Implications: We suggested political and institutional supporting ways for each type of early childhood teachers.

• Korean Journal of Childcare and Education
• /
• v.17 no.4
• /
• pp.129-154
• /
• 2021

Objective: This research examines the understanding of the competencies required from the director of a childcare center. It also analyzes the characteristics of the capabilities of a director of a daycare center. The research questions are as follows: First, what are the competencies of a childcare center director? Second, what are the characteristics of the competencies of a childcare center director? Methods: In this study, the Q methodology was applied. First, the Q population was identified based on prior studies and through open questionnaires and in-depth interviews targeting 71 teachers and directors of childcare centers. Next, 40 Q samples were selected. Second, P samples were selected targeting the 30 directors, Q sort was conducted, and the data were analyzed using the QUANL program. Results: The main results of this study can be summarized as follows. First, four types of competencies were demanded from the director of a daycare center. Second, the competencies required from the director of a daycare center were accountability-centered, functional-management-centered, human-relationshipcentered, and rationality-centered capabilities. Conclusion/Implications: The policy-level of and educational ways to support the competencies of a director of a daycare center were discussed.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.37 no.2
• /
• pp.311-324
• /
• 2017

Energy loss at manholes under surcharged flow is considered as one of the major causes of inundation in urban area. Therefore, it is necessary to analyze the flow characteristics to reduce the energy loss in the surcharged four-way combining manhole. In this study, hydraulic experimental apparatus was constructed considering the results of the present survey. Square manholes and pipe diameters were reduced to 1/5 by applying sewer facility standards. Numerical simulations were carried out with the Fluent 6.3 model to derive the invert condition which can reduce the energy loss in the surcharged four-way combining square manhole. The hydraulic experiments were carried out according to the various conditions of the lateral flow rate($Q_{lat}/Q_{out}$), discharge of outflow pipe (2.0, 3.0, 4.0, 4.8 l/sec), and invert shape (rectangle and square open conduit type). The crossed invert was not found to improve the drainage capacity of the surcharged four-way rectangular combining manhole. However, the improved rectangle open conduit type invert and square open conduit type invert were analyzed to improve the drainage capacity by reducing the head loss coefficients by about 8% and 28%, respectively. Therefore, in order to increase the drainage capacity of urban facilities, it is possible to install and use the improved invert proposed in this study.