• KIEE International Transactions on Electrophysics and Applications
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• 제3C권5호
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• pp.189-193
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• 2003

Initial irreversible capacity (IIC) can be defined by means of the initial intercalation Ah efficiency (IIE) and the initial irreversible specific capacity at the surface (IICs) with the linear-fit range of the intercalation so as to precisely express the irreversibility of an electrode-electrolyte system. Their relationship was IIC = Qc - Q$_{D}$ = (IIE$^{-1}$ - 1) Q$_{D}$ + IICs in the linear-fit range of IIE. Here, Qc and Qd signify charge and discharge capacity, respectively, based on a complete lithium ion battery cell. Charge indicates lithium insertion to carbon anode. Two terms of IIE and IICs depended on the types of active materials and compositions of the electrode and electrolyte but did not change with charging state. In an ideal electrode-electrolyte system, IIE and IICs would be 100%, 0 mAh/g for the electrode and mAh for the cell, respectively. These properties can be easily obtained by the Gradual Increasing of State of Charge (GISOC).OC).

• 수산해양교육연구
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• 제27권4호
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• pp.1063-1074
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• 2015

Nursing students are often embarrassed about offering an intimate care to patients in a clinical environment, and experience stress. In particular, nursing students is often a low level of interaction skill and nursing school has no education program for this intimate care. Therefore, these difficulties are increased while the clinical practice. The purpose of this study was to identify the attitude of female nursing students regarding intimate care to patient and the characteristics of the type by applying Q-methodology, and to create the basic data for the development of education programs for nursing student to prevent stress and embarrassed feeling. Data were collected by applying 35 Q statements to 32 female nursing students. Collected data were analyzed with the PC QUANL program. Results indicate that female nursing students' attitudes of intimate care were divided into four types: 'considering situation-professional obligation type' 'gender related risk avoidance type' 'transcendent professional care type' and 'pursuit of the ideal professional type.' The types of female nursing students' attitudes of intimate care to patient were discussed, focusing on the attitude type identified in this study.

• 한국컴퓨터정보학회논문지
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• 제24권4호
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• pp.129-136
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• 2019

The purpose of this study was to provide basic data necessary for the development of clothing that can improve the satisfaction of body shape of elderly men by examining subjective characteristics and characteristics of perception type of older men's body shape. Using the Q methodology, I investigated and analyzed the process of formation and main characteristics of subjectivity of various types of recognition that elderly men express about their body shape. There were four types of perception of body shape in elderly men: flat hip and bird legs skinny body, back bent and abdominal obese body, thick neck and upper body development body, forward cervical neck and protruding abdomen obese body. The actual body shape of elderly men was classified according to the bust, waist circumference, hip circumference, and body part angle. But recognition body shape of elderly men was classified by visual factors like the abdomen, the angle of the neck, the inclination of the back, the slope of the waist, and the degree of obesity. It is necessary to consider the trend of silver fashion which is increasing in demand. In addition, it is necessary to develop clothing patterns of comfortable fit through ergonomic study on the physical characteristics of older men. Consideration should be given to the design and pattern that can reduce the difference between the ideal body shape and the body shape recognized by older men.

• 디자인융복합연구
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• 제16권6호
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• pp.43-58
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• 2017

최근 다양한 서비스 분야에서 역기능적 소비자 행동으로 인한 서비스 실패 사례가 관찰되고 있다. '진상 손님'이라고 통칭되는 이 소비자는 주변 소비자의 서비스 경험에 악영향을 미치고 이상적인 서비스 이용을 방해할 소지가 있다. 따라서 서비스 디자인 관점에서 역기능적 소비자에 대해 고려할 필요가 커졌으며, 퍼소나를 통해 이러한 소비자 성향을 모델링하는 것이 유용하다고 생각된다. 이를 위해 '사악한 퍼소나'라는 개념을 제시하고, 역기능적 소비자 행동과 관련된 문헌 연구와 Q방법론을 활용하여 디자이너가 역기능적 소비자의 행동을 예측할 수 있는 성격 특성 진술문을 찾고자 하였다. 연구 결과 서비스 특성에 따라 역기능적 소비자 행동이 다른 형태로 표출되고, 다른 성격 특성 진술문의 조합에 의해 예측될 수 있음을 확인하였다. 이를 통해 서비스 형태에 따라 역기능적 소비자의 성격 특성을 달리 제시하여 서비스 디자인 과정에서 더 정확한 소비자 정보를 제공할 수 있다고 판단되었다. '사악한 퍼소나'는 서비스 디자인이 그 영역을 확대하고 있는 상황에서 취약성 및 한계 등 아이디어 검증을 위한 기준으로 활용할 수 있다는 점에서 효용이 크다고 생각된다.

• 충청수학회지
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• 제19권4호
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• pp.319-324
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• 2006

Let K be a finite cyclic extension of $k=\mathbb{F}_q(T)$ of prime degree ${\ell}$. Let ${\tilde{\mathcal{C}}}l_{K,{\ell}}$ be the Sylow ${\ell}$-subgroup of the ideal class group ${\tilde{\mathcal{C}}}l_K$ of $\mathcal{O}_K$. The structure of ${\tilde{\mathcal{C}}}l_{K,{\ell}}$ as $\mathbb{Z}_{\ell}[G]$/<$N_G$>-module is determined the dimensions $${\lambda}_i\;:=dim_{\mathbb{F}_{\ell}}({\tilde{\mathcal{C}}}l_{K,{\ell}}^{({\sigma}-1)^{i-1}}/{\tilde{\mathcal{C}}}l_{K,{\ell}}^{({\sigma}-1)^i})$$ for $i{\geq}1$. In this paper we investigate the dimensions ${\lambda}_1$ and ${\lambda}_2$.

• Transactions on Electrical and Electronic Materials
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• 제15권6호
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• pp.333-337
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• 2014

In this study, the use of a discharging process for charged particles is proposed to achieve an ideal electrical balance or neutralization and to improve the electrical and optical properties of a reflective electronic display. Here, negatively charged particles (white) and positively charged particles (black) are used. The q/m (charge per mass for a particle) values of the black and white particles are $+4.5{\mu}C/g$ and $-4.5{\mu}C/g$, respectively. We compared the movement of the charged particles by varying their discharging time. Stable movement of the charged particles is obtained with an appropriate discharging time, which resulted in improvements of the optical properties of the panel.

• 대한수학회보
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• 제49권4호
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• pp.885-898
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• 2012

Let m, n, r be nonzero fixed positive integers, R a 2-torsion free prime ring, Q its right Martindale quotient ring, and L a non-central Lie ideal of R. Let D : $R{\rightarrow}R$ be a skew derivation of R and $E(x)=D(x^{m+n+r})-D(x^m)x^{n+r}-x^mD(x^n)x^r-x^{m+n}D(x^r)$. We prove that if $E(x)=0$ for all $x{\in}L$, then D is a usual derivation of R or R satisfies $s_4(x_1,{\ldots},x_4)$, the standard identity of degree 4.

• 전기학회논문지
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• 제64권2호
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• pp.260-267
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• 2015

An LCL-type isolated dc-dc converter is analyzed, using ac approximation. Analyses to express characteristics on the proposed converter are derived under steady and ideal elements conditions in this paper. The two operating modes can be identified from the analysis results representing different device conduction sequences. This converter is capable of achieving required output voltage(step up or down) operations with inductance ratio while operated at fixed frequency with constant duty ratio-50%. Experimental results show that the designed converter based on Q has zero voltage switching and constant output voltage at different load variations to verify the analysis.

• 전기학회논문지
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• 제58권5호
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• pp.923-928
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• 2009

The performance analysis and robust control of the interior permanent magnet synchronous motor(IPMSM) greatly depend on accurate value of its parameters. To achieve the high performance of torque control, it is necessary to consider exact inductance values because the inductances are nonlinear parameters of operating the IPMSM. Therefore many different methods have been performed for analysis of the methodology for the exact measurement of synchronous inductances. None of them is considered standard, and accuracy levels of all these methods are also not consistent. Among these experimental methods, the DC current decay test and the vector current control test are ideal for a laboratory environment. In this paper, these two test methods are compared by applying inductances to the IPMSM. The paper analyzes the measured inductances of the two methods and their differences with inductances obtained from the finite element method(FEM).

• Kyungpook Mathematical Journal
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• 제56권2호
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• pp.397-408
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• 2016

Let R be a 2-torsion free prime ring with center Z, U be the Utumi quotient ring, Q be the Martindale quotient ring of R, d be a derivation of R and L be a Lie ideal of R. If $d(uv)^n=d(u)^md(v)^l$ or $d(uv)^n=d(v)^ld(u)^m$ for all $u,v{\in}L$, where m, n, l are xed positive integers, then $L{\subseteq}Z$. We also examine the case when R is a semiprime ring. Finally, as an application we apply our result to the continuous derivations on non-commutative Banach algebras. This result simultaneously generalizes a number of results in the literature.