• Journal of the Korean Society of Clothing and Textiles
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• v.33 no.10
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• pp.1519-1529
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• 2009

This study investigates the influences of the impulse buying tendency of consumers, apparel price and scarcity messages on purchasing behavior at the time of purchase on the internet. This study was comprised of 2 (impulse buying: high versus low) $\times$ 2 (price of Internet purchase products: high apparel price versus low apparel price) $\times$ 2 (scarcity message: quantity scarcity message versus time scarcity message) with three mixed elements. The subjects of this study were 400 college students in the Seoul and Gyeonggi area. A total of 95 students who had a high tendency for impulsive purchase and 104 who had a low tendency participated in the survey. Data are analyzed by factor analysis, T-test, and ANOVA. The results of this study are as follows. 1. At the time of group buying on the Internet, impulse buying tendency, apparel price, and scarcity message had a statistically significant interaction effect on consumer preferences. 2. At the time of purchase on the Internet, impulse buying tendency, apparel price, and scarcity message did not have a statistically significant interaction effect on the intention of consumers to make a purchase. However, there was a significant difference in the intention to make a purchase based on impulse buying tendency and apparel price.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.663-668
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• 2017

This study was conducted to examine the possibility of developing a drawing course in online education and to assess the satisfaction and dissatisfaction of students. The drawing class consisted of a conceptual understanding of the drawing, learning actual techniques and performing drawing tasks. This course was rated on the content satisfaction scale and the course evaluation scale when it was developed in 2014 and partially modified in 2016. Both the content satisfaction and lecture evaluation showed similar scores to the average for all subjects in the school. Specifically, 'organization of content' received good reviews, while 'interaction' received a low rating in the content satisfaction scale. Additionally, 'enthusiasm' and 'response sincerity of teacher' received high ratings, but 'overall satisfaction' was low in the course evaluation scale. Finally, the self-assessment of students was also low. These results indicate that students want more practice and more active interactions.

• The Korean Journal of Community Living Science
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• v.22 no.1
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• pp.145-154
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• 2011

This study investigated the effects of young children's learning-related skills and the maternal involvement on academic abilities. The sample consisted of 310 children from 7 child-care centers located in Seoul and Gyeonggi Province. All variables were measured by the teachers and the mothers of surveyed children. The instrument included the Korean Child Development Inventory(K-CDI) for 4 to 6-year olds and Preschool Learning Behavior Scale(McDermott et al 2000) and the questionnaire on mother's involvement about their children's education. The collected data was analyzed by t-test and hierarchical regression using the SPSS Program. The findings are as follows. First, regardless of the family income level, verbal comprehension and numerical abilities were positively associated with their learning-related skills of young children. Second, the interaction effect of learning-related skills and the mothers' involvement on verbal comprehension of young children in the low-income families was observed. However, no interaction effect was seen in terms of learning-related skills and the maternal involvement on verbal comprehension and numerical abilities of young children in the high-income families. These findings highlight the importance of learning-related skills and their mothers' involvement during the preschool period for the low-income family in improving the early academic achievement.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.39 no.8
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• pp.693-702
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• 2015

This paper presents the performance characteristics of a Darrieus-type vertical-axis wind turbine (VAWT) with National Advisory Committee for Aeronautics (NACA) airfoil blades. To estimate the optimum shape of the Darrieus-type wind turbine in accordance with various design parameters, we examine the aerodynamic characteristics and separated flow occurring in the vicinity of the blade, the interaction between the flow and blade, and the torque and power characteristics that are derived from it. We consider several parameters (chord length, rotor diameter, pitch angle, and helical angle) to determine the optimum shape design and characteristics of the interaction with the ambient flow. From our results, rotors with high solidity have a high power coefficient in the low tip-speed ratio (TSR) range. On the contrary, in the low TSR range, rotors with low solidity have a high power coefficient. When the pitch angle at which the airfoil is directed inward equals $-2^{\circ}$ and the helical angle equals $0^{\circ}$, the Darrieus-type VAWT generates maximum power.

• Journal of the Korean Society of Costume
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• v.57 no.6 s.115
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• pp.160-171
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• 2007

This research studied men's cosmetics purchasing behavior based on the level of interest one has in one's appearance, the country of origin, and the sales promotion of the cosmetics. The study was conducted by experimental $2{\times}[2{\times}2]$ design by combining the 3 variables mentioned above. The Independent variables in this research were levels of appearance interest(high vs. low), the country of origin(Korean vs. foreign), and types of sales promotion(discount vs. coupon). The dependent variables were the purchase behaviors including favor to cosmetics and purchase intent. Two hundred male consumers participated for the study. Data analysis conducted were factor analysis, cluster analysis and ANOVA. The results were as follows. 1. Male consumers' cosmetics favorness: 3-way significant interaction, in appearance interest, the country of origin, and types of sales promotion, was found for favor to male cosmetics. When male subjects were provided with price discounts and skin care coupons for the Korean cosmetics, they didn't reveal significant differences in favor, regardless of the level of appearance interest. However, for the imported cosmetics, male subjects with high appearance interest showed more favor to the cosmetics than the ones with low appearance interest. 2. Male consumers' purchase intent: 3-way significant interaction, in appearance interest, the country of origin, and types of sales promotion was found for the purchase intent. When male subjects were provided with price discounts and skin care coupons for the Korean cosmetics, they didn't show significant difference in purchase intent, regardless of their appearance interest. However, for the imported cosmetics, male consumers with high appearance interest reported more purchase intent than the ones with low appearance interest.

• Journal of Distribution Science
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• v.14 no.10
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• pp.117-126
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• 2016

Purpose - Color is perceived to have an effect on humans' cognition and behavior because of its association with specific concepts. Since there are few studies linking color and price presentation, we investigated a constrained condition of consumers' regulatory focus and involvement. Research design, data, and methodology - We performed a 2 (color: red vs. black) × 2 (regulatory focus: prevention vs. promotion) × 2 (involvement: high vs. low) test of our hypothesis. The target product was a portable data storage device (USB) and data from 165 respondents were analyzed. Each condition had two stages. In the first, product information and price were presented. After reviewing the product information, respondents evaluated price attractiveness. In the second stage, respondents filled out regulatory focus and involvement questionnaires. The main variables were color, regulatory focus, and involvement. Therefore, we ran a three-way ANOVA (Analysis of Variance) to test our hypothesis. Results - When the price was red (vs. black), consumers perceived the red price as more attractive than the black price. However, this effect varied by situation. Specifically, in the low involvement condition among prevention-focused consumers, when the price was in red, price attractiveness was higher than when the price was in black. However, for promotion-focused consumers, there was no difference in the price color effect. In the high involvement condition, promotion-focused consumers showed stronger price attractiveness for the red price than the black price. However, the effect of price color diminished for prevention-focused consumers. That is, prevention-focused consumers did not reveal a different price perception between red versus black in the high involvement condition. Conclusions - This research contributes by academically linking the effects of color to price attractiveness, and focusing on the interaction of regulatory focus and involvement. When involvement is low, the effect of red disappeared for promotion-focused consumers, whereas the same happened for prevention-focused consumers under the condition of high involvement.

• Journal of the Earthquake Engineering Society of Korea
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• v.15 no.3
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• pp.1-9
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• 2011

The purpose of this study is to examine the dynamic characteristics of low, medium and high speed Maglev trains and guideways through dynamic interaction analysis. The coupled dynamic equations of motion for a vehicle of 10-dof and the associated guideway girders are developed by superposing vibration modes of the girder itself. The controller used in the UTM-01 Maglev vehicle is adopted to control the air gap between the bogie and guideway in this study. The effect of roughness, the guideway deflection-ratio and vehicle speed on the dynamic response of the maglev vehicle and guideway are then investigated using the 4th Runge-Kutta method. From the numerical simulation, it is found that the air gap increases with an increase of vehicle speed and the roughness condition. In particular, the dynamic magnification factor of the guideway girder is small at low and medium speeds, but the factor is noticeable at super-high speeds.

• Mycobiology
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• v.48 no.5
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• pp.410-417
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• 2020

Fungal ecological interactions play a key role in structuring community assemblages. These associations may involve both antagonistic and synergistic relationships, which are commonly influenced by abiotic factors such as nutrient conditions. However, information for extreme, oligotrophic systems remain poor. Herein, interactions among key members of the aquatic transient fungal community (Aspergillus niger, Cladosporium sp., and Coprinellus micaceus) of a low-nutrient freshwater system in the Cuatro Ci enegas Basin, Mexico were studied. Pairwise interaction bioassays were explored in vitro under different nutrient conditions, including carbohydrates-rich, carbohydrates and amino peptides-rich, and low nutrients. Our results indicated that antagonistic patterns prevail among the studied taxa. However, nutrient-dependent changes were observed in Cladosporium sp. shifting to synergy under carbohydrates-rich conditions, suggesting changes in the fungal community composition as a result of nutrient enrichment. Remarkably, our findings contrast with previous work demonstrating mainly synergistic interactions between our tested fungal isolates and co-occurring autochthonous bacteria (Aeromonas spp. and Vibrio sp.) under low-nutrient conditions. This observation may indicate that bacteria and fungi exhibit distinct community-level responses, driven by nutrient conditions. This contributes to the knowledge of fungal community dynamics and interspecific interactions in an oligotrophic ecosystem, highlighting the relevance of nutrient-based shifts and antagonistic interactions in ecosystem dynamics.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.13-13
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• 2010

Switching an elementary excitation by injecting a single carrier would offer the exciting opportunity for the ultra-high data storage technologies. However, there has been no methodology available to investigate the interaction of low energy discrete carriers with nano-structures. In order to map out the spatial dependency of such single carrier level interactions, we developed a pulse-and-probe algorithm, combining with low temperature scanning tunneling microscopy. The new tool, which we call single carrier spectroscopy, allows us to track the interaction with the target macrostructure with tunneling carriers on a single carrier basis. Using this tool, we demonstrate that it is possible not only to locally write and erase individual bi-solitons, reliably and reversibly, but also to track of creation yields of single and multiple bi-solitons. Bi-solitons are pairs of solitons that are elementary out-of-phase excitations on anti-ferromagnetically ordered pseudo-spin system of Si dimers on Si(001)-c(42) surfaces. We found that at low energy tunneling the single bisoliton creation mechanism is not correlated with the number of carriers tunneling, but with the production of a potential hole under the tip. An electric field at the surface determines the density of the local charge density under the tip, and band-bending. However a rapid, dynamic change of a field produces a potential hole that can be filled by energetic carriers, and the amount of energy released during filling process is responsible for the creation of bi-solitons. Our model based on the field-induced local hole gives excellent explanation for bi-soliton yield behaviors. Scanning tunneling spectroscopy data supports the existence of such a potential hole. The mechanism also explains the site-dependency of bi-soliton yields, which is highest at the trough, not on the dimer rows. Our study demonstrates that we can manipulate not just single atoms and molecules, but also single pseudo-spin excitations as well.

• Journal of Radiation Industry
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• v.10 no.1
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• pp.7-12
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• 2016

Ikaros, a transcription factor containing zinc-finger motif, has known as a critical regulator of hematopoiesis in immune system. Ikaros protein modulates the transcription of target genes via binding to the regulatory elements of the genes promoters. However the regulatory function of Ikaros in other organelle except nuclear remains to be determined. This study explored radiation-induced modulatory function of Ikaros in cytoplasm. The results showed that Ikaros protein lost its DNA binding ability after LDIR (low-dose ionizing radiation) exposure. Cell fractionation and Western blot analysis showed that Ikaros protein was translocated into cytoplasm from nuclear by LDIR. This was confirmed by immunofluorescence assay. We identified Autotaxin as a novel protein which potentially interacts with Ikaros through in vitro protein-binding screening. Co-immunoprecipitation assay revealed that Ikaros and Autotaxin are able to bind each other. Autotaxin is a crucial enzyme generating lysophosphatidic acid (LPA), a phospholipid mediator, which has potential regulatory effects on immune cell growth and motility. Our results indicate that LDIR potentially regulates immune system via protein-protein interaction of Ikaros and Autotaxin.