• Journal of applied mathematics & informatics
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• v.5 no.3
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• pp.819-826
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• 1998

The purpose of this paper is to prove the following results; (1) Let R be a prime ring of char $(R)\neq 2$ and I a nonzero left ideal of R. The existence of a nonzero symmetric bi-derivation D : $R\timesR\;\longrightarrow\;$ such that d is sew-commuting on I where d is the trace of D forces R to be commutative (2) Let m and n be integers with $m\;\neq\;0.\;or\;n\neq\;0$. Let R be a noncommutative prime ring of char$ (R))\neq \; 2-1\; p_1 \;n_1$ where p is a prime number which is a divisor of m, and I a nonzero two-sided ideal of R. Let $D_1$ ; $R\;\times\;R\;\longrightarrow\;and\;$ $D_2\;:\;R\;\times\;R\;longrightarrow\;R$ be symmetric bi-derivations. Suppose further that there exists a symmetric bi-additive mapping B ; $R\;\times\;R\;\longrightarrow\;and\;$ such that $md_1(\chi)\chi ＋ n\chi d_2(\chi)=f(\chi$) holds for all $\chi$$\in$I, where $d_1 \;and\; d_2$ are the traces of $D_1 \;and\; D_2$ respectively and f is the trace of B. Then we have $D_1=0 \;and\; D_2=0$.

• Cross-Cultural Studies
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• v.24
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• pp.19-31
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• 2011

This article examines the historical view of Benito $P{\acute{e}}rez$ $Gald{\acute{o}}s$ in his historical novel named "Zaragoza" and "$C{\acute{a}}novas$" by comparing with Numancia of Cervantes. In front of the national survival crisis, $Gald{\acute{o}}s$ recognizes that it is necessary that Spain should recover humanity and morality on basis of the krausist ideal. The krausists warned subjective idealism, stressing on free-will and moral conscience in a harmonious balance of rationality. Without refusing patriotism, they warned egoistic patriotism deformed by national selfishness or nationalism. Giner de los Ríos insisted on a necessity of harmonizing national inclination and universal one. $Gald{\acute{o}}s$ emphasizes that the identity of Spain is not possession of privileged class but sweat and tears of the mass of people in daily life. He represents Efemera as the ideal history on the basis of Unamuno's 'intrahistoria', by which, instead of $Luk{\acute{a}}cs^{\prime}$ progressive history, we can peep into a historical poetics of human free nature and vividness of discontinuous and endless shifting. According to the sub-history, we come to the conclusion that $Gald{\acute{o}}s$ and Cervantes would lay emphasis on sub-history, aiming to essence of Spanish soul originated from national landscape and people's daily life.

• Korean Journal of Community Nutrition
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• v.8 no.5
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• pp.658-666
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• 2003

This study was carried out to investigate among adolescents (total=729) the relationship between their self-esteem, body-cathexis, their attitudes toward the importance of their bodies, their anthropometric characteristics, their perceptions of their body shapes and their experiences with weight control. The results are summarized as follows: The mean values for self-esteem and body-cathexis were generally low, but these values were significantly higher among boys than girls (p<0.01-0.001). However the mean values for their attitudes toward the importance of their bodies were relatively high and were significantly higher among girls than boys (p<0.01). The mean values for Percent Ideal Body Weight (PIBW) and Body Mass Index (BMI) were normal and no significant differences between the genders were observed. The distribution of the PIBW and the BMI values showed a higher rate for normal weights among the girls and a higher rate for underweightedness and obesity among the boys (p<0.01). With regard to their perception of their body image, among the boys, their current figures were almost identical with their idea of an ideal figure, but among the girls, their idea of an ideal figure was thinner than their current figure. The girls were more dissatisfied with their own body image than the boys (p<0.001). Fifty-four percent of the subjects had previous weight control experience, and the girls had significantly more experience than the boys (p<0.001). Their main reason for practising weight control was to lose weight (65.3%) Those who had more weight control experience had lower satisfaction with their body shapes, higher PIBW, higher BMIs or currently had fatter figures. Their standard image of their figures was influenced by TV (40.3%) and friends (36.9%). There was a weakly positive correlation between their self-esteem and their satisfaction with their body shapes, and a weakly negative correlation between their satisfaction with their body shapes and their attitudes toward the importance of their bodies. These results suggest the necessity for an educational program for adolescents as to foster a positive body image. Such a program should consider psychological factors such as self-esteem, satisfaction with body shape and attitudes toward the importance of the body.

• Bulletin of the Korean Mathematical Society
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• v.55 no.1
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• pp.311-317
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• 2018

Let (R, m) be a commutative Noetherian local ring and I be an ideal of R. In this paper it is shown that if cd(I, R) = t > 0 and the R-module $Hom_R(R/I,H^t_I(R))$ is finitely generated, then $$t={\sup}\{{\dim}{\widehat{\hat{R}_p}}/Q:p{\in}V(I{\hat{R}}),\;Q{\in}mAss{_{\widehat{\hat{R}_p}}}{\widehat{\hat{R}_p}}\;and\;p{\widehat{\hat{R}_p}}=Rad(I{\wideha{\hat{R}_p}}=Q)\}$$. Moreover, some other results concerning the cohomological dimension of ideals with respect to the rings extension $R{\subset}R[X]$ will be included.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.22 no.6
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• pp.832-839
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• 1998

The potential work is defined as the maximum available work extractable from a composite system. It is important concept to understand the behavior of a composite system because it is a property of the composite system and shows the possible room for the system to change its state by itself. To explain this concept quantitatively, the behavior of a composite system composed of two simple ideal gas systems is analyzed. The potential work of the composite system is estimated, the various reversible processes from a given state to the equilibrium state and the processes on which potential works are constant are shown on the T-P and S-V planes. Such an effort will be necessary to understand and characteristics of composite systems as well as helpful for a deeper comprehension of the energy conversion principles.

• Proceedings of the KIPE Conference
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• 1998.10a
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• pp.859-864
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• 1998

Compact and small size, reliable and failsafe operation and low cost featuring fault current limiter causing the designer to take a close look into the use of passive fault current limiter(FCL) for the protection of power semiconductor devices in power electronic systems. This paper has identified the main parameters responsible for the development of ideal passive magnetic current limiter. The effect of those parameters on the range of operation and the voltage-current characteristics of the magnetic current limiter has been studied using tableau approach. Desirable characteristics are discussed and the simulation results are presented.

• Korean Journal of Organic Agriculture
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• v.11 no.4
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• pp.39-59
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• 2003

The purpose of this study is to introduce issues on agricultural policy of participatory government and to suggest some implications for national consensus. According to the finance and investment plan, 119 trillion won in total will be invested in the farming industry for improving the welfare system and development of the sector over the next 10 years. It is very important that this plan will make Korean farmers competitive and income per capita increased more and more. By the way, the plan has been argued by farmer’s organization(NGO) and some people of academic circles because there is a fair question as to how effective these investment aids will be. Therefore, the finance and investment plan must be established on the basis of effective execution system as well as additional discussion for national agreement. In addition, the 'Special Plan Committee for agriculture-fishery and farming-fishing communities' will work out an ideal framework for succeeding this plan.

• Bulletin of the Korean Chemical Society
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• v.11 no.6
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• pp.508-511
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• 1990

The simple binary mixtures of pure phospholipids such as DPPC:DSPC and DPPC:DPPA were investigated with differential scanning calorimeter. The thermotropic properties of DPPC and DSPC mixtures did not deviate much from the ideal curves that was obtained on varying either the temperature or the relative proportions of phospholipids. This means that the two phospholipids are completely miscible in the liquid and solid phase. But the thermotropic properties of DPPC and DPPA mixture deviated much from the ideal phase diagram. It resulted from the repulsion between the head groups of acidic phospholipids. Heat capacity suggested by Harden McConell was calculated. The larger $C_p$ was, the sharper the endothermic peak became.

• Communications of the Korean Mathematical Society
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• v.26 no.3
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• pp.427-443
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• 2011

In [6, 8], we showed that any ideal of $\mathbb{Z}_4[X]/(X^l\;-\;1)$ is generated by at most two polynomials of the `standard' forms when l is even. The purpose of this paper is to find the `standard' generators of the cyclic codes over $\mathbb{Z}_{p^a}$ of length a multiple of p, namely the ideals of $\mathbb{Z}_{p^a}[X]/(X^l\;-\;1)$ with an integer l which is a multiple of p. We also find an explicit description of their duals in terms of the generators when a = 2.

• The Research Journal of the Costume Culture
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• v.14 no.3 s.62
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• pp.514-527
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• 2006

It can be said that the ultimate goal of advertising is creating consumers' buying intention and buying behavior toward advertised goods. But literature suggests that ads have both intended and unintended consequences, and one of the unintended consequences is that the idealized images of physical attractiveness found in advertising have negative impact on girls' and womens' self-perceptions. Thus, this study, using social comparison theory as a framework, was designed to investigate the influences of the images of models in ads portrayed in TV and fashion magazines on the purchasing intention, self-esteem and body satisfaction of college women. Using an experimental stimulus, a moving picture representing thin and attractive models in the context of advertising fashion goods, two conditions were manipulated and the subjects were placed into one of two groups randomly, the experiment group and the control group. The experiment group only was exposed to the ads portraying highly attractive models. Data were collected from two groups using same questionnaire. The data were analyzed using t-test, two-way ANOVA, and descriptive statistics. The findings were as follows: 1. The thin and attractive image of models in ads on buying intention had significant positive influence on buying intention(p<.05). 2. The thin and attractive image of models in ads had significant negative influences on self-esteem(p<.05). 3. The thin and attractive image of models in ads had significant negative influence on body satisfaction(p<.05). 4. The ideal body internalization had significant negative influences on body satisfaction(p<.05), but interaction effect of model's image and ideal body internalization on body satisfaction was not significant.