• Journal of the Korean Magnetics Society
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• v.8 no.3
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• pp.150-155
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• 1998

The purpose of this study is to investigate the variations of rheological and magnetic properties with powder loading in plastic anisotropic ferrite magnets. The measured relative viscosities with powder loading were compared with the calculated ones. The variation of relative viscosities with powder loading was in good agreement with that of particle alignment. Remanent flux density and maximum energy product increased linearly with the increase of powder loading, and then showed maximum values. The decrease of magnetic properties at high powder loading was caused by rapid decrease of particle alignment due to the drastic increase of mixture viscosity. The powder loading for maximum magnetic properties is dependent on magnetic field during injection molding and melt viscosity of binder, so the binder with low melt viscosity is necessary to fabricate the magnet with high properties.

• Journal of the Korean Vacuum Society
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• v.20 no.1
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• pp.57-62
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• 2011

We have studied the electrical and magnetic transport properties of tunneling device with FePt magnetic quantum dots. The FePt nanoparticles with a diameter of 8~15 nm were embedded in a $SiO_2$ layer through thermal annealing process at temperature of $800^{\circ}C$ in $N_2$ gas ambient. The electrical properties of the tunneling device were characterized by current-voltage (I-V) measurements under the perpendicular magnetic fields at various temperatures. The nonlinear I-V curves appeared at 20 K, and then it was explained as a conductance blockade by the electron hopping model and tunneling effect through the quantum dots. It was measured also that the negative magneto-resistance ratio increased about 26.2% as increasing external magnetic field up to 9,000 G without regard for an applied electric voltage.

• Journal of the Korean Magnetics Society
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• v.11 no.6
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• pp.256-261
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• 2001

These experiments were carried out to examine the effects of element substitution of Zn and La-Zn for Sr-ferrite. The calcined properties of Zn and La-Zn element substitution were examined, and also the sintered magnetic properties were compared with the stoichiometric condition. The magnetization properties of calcined SrM materials is as follows; M$\_$s/ : 61.06 emu/g. Also, the magnetization properties of calcined Zn$\_$0.3/-SrM materials is as follows; M$\_$s/ : 66.90 emu/g. The sintered magnetic properties of (La-Zn)$\_$0.3/-SrM composition is as follows; B$\_$r/ : 4.21 kG, BH$\_$max/: 4.19 MGOe.

• Proceedings of the Korean Magnestics Society Conference
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• 2012.11a
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• pp.38-39
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• 2012

• Proceedings of the Korean Magnestics Society Conference
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• 1998.10a
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• pp.52-53
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• 1998

• Journal of Industrial Convergence
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• v.20 no.9
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• pp.1-10
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• 2022

The purpose of this study is to provide strategic implications so that non-cognitive abilities such as personal and job characteristics can be used for human resource development of financial companies by identifying the effects of personal and job characteristics on self-development intentions. The results of this study are as follows. First, Intimacy was analyzed to have a positive (+) effect on self-development intention. Second, Job importance was found to have a positive (+) effect on self-development intention. Third, job stress, a moderating variable, had a significant negative (-) moderating effect on intimacy and self-development intention.

• The Journal of the Korea Contents Association
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• v.16 no.11
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• pp.199-210
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• 2016

This study was conducted to examine the mediation effect of narcissistic personality traits and schizophrenic personality traits on the relationship between smartphone addiction and relational aggression of middle school girls. Data from 378 girls in Kyungki and Chungchoeng areas were analyzed. Main results were as follows. First, smartphone addiction showed significant positive correlations with narcissistic personality traits, schizophrenic personality traits and relational aggression. Both personality traits also showed positive relationship with relational aggression. Second, narcissistic personality traits fully mediated the relationship between smartphone addiction and reactive relational aggression. Third, schizophrenic personality traits partially mediated the relationship between smartphone addiction and relational aggression. Finally, clinical implications for adolescent girls at high risk of smartphone addiction and suggestions for future studies were discussed.

• Proceedings of the Korean Magnestics Society Conference
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• 1998.05a
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• pp.108-109
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• 1998

• Proceedings of the Korean Magnestics Society Conference
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• 1993.11a
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• pp.88-88
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• 1993

• Proceedings of the Korean Magnestics Society Conference
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• 2002.04a
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• pp.138-139
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• 2002