• Journal of Contemporary Eastern Asia
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• v.18 no.1
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• pp.217-234
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• 2019

This study examined effects of the social-psychological motivations to use Instagram (i.e., identity seeking, social interaction) and narcissistic personality on personal attachment to Instagram and intention to post photos on Instagram. Identity seeking, social interaction and narcissistic personality (i.e., grandiose/exhibition) had significant positive effects on personal attachment to Instagram. Identity seeking and social interaction had significant positive effects on intention to post photos on Instagram. However, narcissistic personality had no effect on the intention to post photos on Instagram. The study results support the theory of the extended-self in the digital context. This study also provides useful information to help organizations understand why people use Instagram as well as how to take advantage of Instagram to enhance their services and consumer experiences.

• Journal of the Korean Physical Society
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• v.73 no.11
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• pp.1691-1697
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• 2018

Employing the density functional theory, we have investigated the roles of Coulomb and Hund's interactions in the electronic and magnetic properties of newly discovered ${\alpha}-RuCl_3$ having the $R{\overline{3}}$ symmetry, which is in close proximity of the Kitaev system. We show that both the size and the direction of local magnetic moment are highly dependent on Coulomb and Hund's interactions, and the spin and orbital parts show different behaviors. The validity of the so-called $j^{eff}$ picture is accessed upon interaction parameters, and the explicit roles of Hund's interaction in the local electronic structures and magnetic properties are discussed.

• Informatization Policy
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• v.22 no.4
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• pp.91-104
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• 2015

This study tests the effects of differential association, definitions, differential reinforcement and imitation from social learning theory in the explanation of university students' crimes in social network services. In addition, this study tests the interaction effects between social learning factors and other factors such as low self-control, subcultural environment, and crime opportunity for the integrated approach. Using data from 486 university students in Seoul, results show that both definition and imitation have significant influences on crimes, even though differential association and differential reinforcement factors have no significant influences on crimes in social network services. Results also reveal that there are significant interaction effects between definition and subcultural environment, which meana that definition has a strong effect on crimes in high subcultural environment. In addition, it is found that reinforcement has also a strong effect on crimes in high crime opportunity and that interaction effect between imitation and low self-control is significant, which means that imitation has a strong effect on crimes in low self-control students.

• Journal of the Korean Chemical Society
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• v.59 no.1
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• pp.9-17
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• 2015

The density functional theory (DFT) calculations on $(H_2O)_n@C_{60}$, (n=1-10) complexes have been performed to elucidate hydrogen interaction between fullerene and water clusters. The optimized geometries, harmonic vibrational frequencies, and binding energies are predicted at various levels of theory. The harmonic vibrational frequencies for the molecules considered in this study show all real numbers implying true minima. We also compare the H-bond interaction between $(H_2O)_n$ and $(H_2O)_n@C_{60}$, (n=1-10) clusters.

• Journal of Korean Society of Steel Construction
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• v.9 no.3 s.32
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• pp.351-362
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• 1997

In designing short to medium-span bridges, continuous composite bridges are becoming popular due to their advantages. However, if the concrete slab in continuous composite bridge is not prestressed, negative moment occurs in the mid-support and creates problems such as cracks in the concrete slab. Therefore. it must be considered in design. Two methods of arrangement of shear connectors were conducted using finite element elastic plastic analysis. Partial interaction theory was introduced and an analytical solution based on this theory was derived. The differences in the degree of interaction were investigated using analytical solutions and finite element analyses of simple composite beam and continuous composite beams. The results of the analyses were used to determine the advantage and disadvantages as well as any precaution when necessary using partial composite during actual design and construction.

• Journal of Korean Society on Water Environment
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• v.26 no.1
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• pp.89-95
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• 2010

The electrokinetic potential of $CaCO_3$, which takes an important part in aquatic system, has been measured and the variation of total energy between $CaCO_3$ particles with the distance of particles was estimated based on DLVO theory. The electrokinetic potential of particles was observed to increase to positive direction as the charge valence of cations which was added to suspension was increased. Also, the total interaction energy between particles was estimated to be more negative as the charge valence of cation was higher and its concentrations was raised. When a mixture of cations with different charge valences was added, the influence of cation with a higher charge valence was more significant on the total interaction energy between particles. When anion was added to the suspension of $CaCO_3$, the total energy estimated by DLVO theory was examined to move to positive direction and the electrokinetic potential of particles became more negative. Likewise cations, the effect of anions on the electrokinetic potential of particles and total interaction energy between them was observed to be proportional to their charge valence and the influence of the mixture of anions with different charge valence became more remarkable as the mixing ratio of the anion with a higher charge valence was increased.

• Journal of the Korean association of regional geographers
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• v.5 no.2
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• pp.15-27
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• 1999

The purpose of this study is to make a conceptual framework for comprehensively and dynamically understanding region which is based on an interaction among space, time, and society. Region is not naturally and objectively given, but socially constructed based on material space, and such a socially constructed region takes an active role for changing society because of the conflicts either within the region or among the regions. Particularly the social theory which tries to establish the new perspectives to the interaction between space and society is not much concerned about the relations between space and time and also those between society and nature. The theory of space and time scale is needed to deeply understand space, time, and society/nature.

• Bulletin of the Korean Mathematical Society
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• v.38 no.4
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• pp.643-655
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• 2001

We discuss the existence of positive solutions to a certain nonlinear elliptic system representing a competition interaction with self-diffusion. The method used here is a fixed point index theory in a positive cone. We give a sufficient condition for the existence of positive solutions.

• Journal of the Korean Data and Information Science Society
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• v.15 no.1
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• pp.141-172
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• 2004

This paper studied the theory and methodology of CRM for insurance business and perform empirical analysis to verify causes of success. It considered five factors as variables to explain success of CRM which are (1) Integration through the partnership among organization and members. (2) Utilization of customers' information. (3) Strategy through marketing channel and interaction with customers. (4) Investment and IT infrastructure to construct CRM system. (5) Interaction among organizations for CRM. The success is defined as four terms; effectiveness of organization, curtailment of cost, improvement of customer service and sale of insurance.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.10 no.16
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• pp.81-88
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• 1987

This article develops to determine and to allocate the two level factors at the table of orthogonal arrays. The column numbers of two factors and two-factor interaction can be determined in applying the bit-by-bit EX-OR operation. The assignment of the Two factors and Two factor interaction is attained by USING COMPUTER, IBM PC/AT applying algorithm of EX-OR operation Theory.