• Journal of the Korean Society of Costume
• /
• v.51 no.5
• /
• pp.135-145
• /
• 2001

In this study, investigation into the impact of sensation seeking tendency and clothing attitudes upon brand variety seeking will be made through the presentation of sensation seeking tendency as consumer's motivation of clothing behavior and clothing attitude as parameter. To give goals of this study. First, to help the understanding of consumers by elucidating consumer's psychological characteristics against sensation seeking tendency, clothing attitude and diverse brands seeking. Second, to offer standard for specifying market by presenting theoretical as well as empirical data. Third. to create successful marketing strategy according to consumer groups and moreover to increase sales efficiency. Research results are as follows : As a result of investigating on which factor among sensation seeking tendency affects on seeking various brands, change seeking tendency and aesthetic seeking impact upon seeking various kinds of brands. Change seeking is turned out to be the most influential factor. Fashion leadership, fashion innovativeness, attention concentration, social approval and clothing interest had an impact on diverse kinds of brand seeking: there was a positive relations with fashion leadership. attention concentration. clothing interest and fashion innovativeness, whereas a negative link with social approval. Three factors of sensation seeking tendency, two factors, that is change seeking and aesthetic seeking. have direct and indirect paths that lead to diverse brand seeking, via clothing attitude. that is to say, clothing interest. fashion leadership. social approval and attention concentration. On the other hand, thrill and risk seeking only had indirect path. Aesthetic seeking showed higher significance to indirect effect on diverse brand seeking which takes clothing attitude as a parameter, than that of direct effect. Brand variety seeking was under considerable effect of fashion leadership, clothing interest and attention concentration, in order.

• Restorative Dentistry and Endodontics
• /
• v.35 no.2
• /
• pp.69-79
• /
• 2010

The purpose of this study was to evaluate the effect of film thickness of various resin cements on bonding efficiency in indirect composite restoration by measurement of microtensile bond strength, polymerization shrinkage, flexural strength and modulus, fractographic FE-SEM analysis. Experimental groups were divided according to film thickness (< $50\;{\mu}m$-control, $50\;{\mu}m$-T50, $100\;{\mu}m$-T100, $150\;{\mu}m$-T150) using composite- based resin cements (Variolink II, Duo-Link) and adhesive-based resin cements (Panavia F, Rely X Unicem). The data was analyzed using ANOVA and Duncan's multiple comparison test (p < 0.05). The results were as follows ; 1. Variolink II showed higher microtensile bond strength than that of adhesive-based resin cements in all film thickness (p < 0.05) but Duo-Link did not show significant difference except control group (p > 0.05). 2. Microtensile bond strength of composite-based resin cements were decreased significantly according to increasing film thickness (p < 0.05) but adhesive-based resin cements did not show significant difference among film thickness (p > 0.05). 3. Panavia F showed significantly lower polymerization shrinkage than other resin cements (p < 0.05). 4. Composite-based resin cements showed significantly higher flexural strength and modulus than adhesive-based resin cements (p < 0.05). 5. FE-SEM examination showed uniform adhesive layer and well developed resin tags in composite-based resin cements but unclear adhesive layer and poorly developed resin tags in adhesive-based resin cements. In debonded surface examination, composite-based resin cements showed mixed failures but adhesive-based resin cements showed adhesive failures.

• Korean Journal of Veterinary Service
• /
• v.24 no.2
• /
• pp.127-132
• /
• 2001

Porcine circoviruses(PCV) are the smallest nonenveloped DNA viruses containing a unique single-stranded circular genome. No recognized link was found between PCV infection of pig and disease. But the PCV consistently identified from postweaning multisystemic wasting syndrome(PMWS) and researches indicate that there are strong relationships between PCV and PMWS. Clinical signs were emaciation, dyspnea, high fever with normal appetite. Necropsy findings showed respiratory disease complex lesion and lymph node anomalities. An indirect-immunofluorescent antibody procedure was used to assay swine sera for the presence of PCV atibodies. Antibodies against PCV were found in an average of 20% of the samples tested. The PCV DNA was amplified from lymph nodes collected from pigs. PCV specific primers were successfully amplified PCV DNAs. Further studies are needed to determine the possible role this virus might have in disease.

• Journal of Power Electronics
• /
• v.8 no.1
• /
• pp.81-90
• /
• 2008

This paper presents an investigation of a voltage and frequency controller for an isolated asynchronous generator (IAG) driven. by a wind turbine and supplying 3-phase 4-wire loads to the isolated areas where a grid is not accessible. The control strategy is based on the indirect current control of the VSC (voltage source converter) using the frequency PI controller. The proposed controller consists of three single-phase IGBT (Insulated Gate Bipolar Junction Transistor) based VSC, which are connected to each phase of the IAG through three single phase transformers and a battery at their DC link. The controller has the capability of controlling reactive and active powers to regulate the magnitude and frequency of the generated voltage, harmonic elimination, load balancing and neutral current compensation. The proposed isolated system is modeled and simulated in MATLAB using Simulink and PSB (Power System Block-set) toolboxes to verify the performance of the controller.

• Korean Journal of Human Ecology
• /
• v.22 no.2
• /
• pp.257-266
• /
• 2013

The purpose of this study was to test the multiple mediating effects between attachment and life quality among university freshmen, regards on positive and negative affect, stress, social support and mental health as mediating factors. 200 freshmen were selected for the questionnaire study in a university in Busan. There were significant correlations among positive and negative affect, stress, social support, mental health and life quality with attachment. The maximum likelihood estimation revealed that attachment had no direct link with life quality. Attachment had indirect effects on life quality, mediated by positive affect and mental health. The results and limitations of this study were also discussed, from the perspective of attachment theory and previous studies.

• Proceedings of the KIEE Conference
• /
• 1989.11a
• /
• pp.245-249
• /
• 1989

From the careful analysis of the transformed dq system equations of a PWM Voltage Source Converter ( PWM - VSC ), a novel voltage control is proposed which is based on the derivative of in-phase current component of line currents and the relation between dc-link voltage and in-phase current component. A simple logical algorithm to implement the proposed scheme is also presented at transient state. The sinusoidal PWM is adopted at steady state. The simulation results show good transient characteristics.

• Proceedings of the KIPE Conference
• /
• 2003.11a
• /
• pp.73-76
• /
• 2003

This paper proposes a maximum output power control of grid-connected wind power generation system using cage-type induction generators. For generator control, indirect vector control is used, where d-axis current controls the excitation level and q-axis current controls the generator speed. The generated power flows into the utility through the grid-side converter, by which the do link voltage is controlled to be constant and the ac current is controlled in sinusoid and. The generator speed is adjusted according to wind speed for extracting maximum power generation. Experimental results are shown to verify the validity of the proposed scheme.

• Journal of Power Electronics
• /
• v.8 no.2
• /
• pp.141-147
• /
• 2008

This paper deals with a new and improved control technique for shunt active filters (AF) used for compensating unwanted harmonic currents injected in the mains due to nonlinear varying loads. This work is motivated by the need to find a permanent solution to the rigorous hit and trial method for evaluating system parameters in an indirect control of AF. A fuzzy pre-compensated PI (Proportional-Integral) controller is used to fuzzify the reference DC voltage of AF to the controller input so that the overshoots and undershoots in its DC link voltage are minimized and the settling time is improved. A three-phase diode rectifier with R-L (Resistive-Inductive) load is used as a non-linear load to study the effectiveness of the proposed controller of the AF. Robustness to filter parameter variations, insensitivity to controller parameter variations, and transient response has been taken as performance evaluation parameters. The results are shown through simulations in Matlab using power system block sets to demonstrate the capability of the proposed controller of the AF.

• Safety and Health at Work
• /
• v.9 no.4
• /
• pp.434-440
• /
• 2018

Background: In industrial countries, home care of community dwelling elderly people is rapidly growing. Frequent injuries in home caregivers result from slips, trips, and falls (STFs). The current study tests attentional cognitive failure to mediate the association between work stressors and STFs. Methods: A sample of 125 home caregivers participated in a questionnaire study and reported work interruptions, unreasonable tasks, quality-threatening time pressure, conscientiousness, attentional cognitive failures, and STFs. Results: In structural equation modeling, the mediation model was shown to fit empirical data. Indirect paths with attentional cognitive failures as the link between work stressors and STF were all significant in bootstrapping tests. An alternative accident-prone person model, that suggests individual differences in conscientiousness to predict attentional cognitive failures that predict more frequent work stressors and STFs, showed no significant paths between work conditions and STFs. Conclusion: To prevent occupational injury, work should be redesigned to reduce work interruptions, unreasonable tasks, and quality-threatening time pressure in home care.

• Korean Journal of Social Welfare
• /
• v.68 no.1
• /
• pp.53-71
• /
• 2016

This study, we analyzed the following in order to verify the effects of depression on suicidal ideation. First, correlations among depression, family solidarity and suicide variables were analysed. Second, the hierarchical regression analysis was conducted to examine the effects of suicidal ideation. Third, family solidarity Sobel-test was performed to investigate whether family solidarity mediates the link between depression and suicidal ideation. The data used in the study comes from the survey conducted by Hallym Aging Research Institute in 2014. Through stratified multi-stage random sampling, 2,034 individuals aged 65 and over and living in Chun-cheon city were analysed. The result with depression and family solidarity together shows the higher the level of depression is, the more suicide ideation is. which means depression has a direct impact on suicide ideation. In addition, it indicates the higher family solidarity is, the less suicide ideation is. Sobel-test which examines indirect effects of depression on suicidal ideation through family solidarity produces a statistically meaningful result. The result is family solidarity mediates the link between depression and suicidal ideation.