• 한국콘텐츠학회논문지
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• 제20권1호
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• pp.117-126
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• 2020

이 연구는 온라인 토론활동에 대한 학습분석 기반 대시보드 유형이 학습자들의 그룹토론에 미치는 영향을 탐색하기 위해 수행되었다. 대학생 51명을 대상으로 참여도와 상호작용 대시보드를 제공한 집단과 토론주제와 메시지유형 대시보드를 제공한 집단으로 나누어 실험연구를 실시하였다. 먼저 온라인 토론활동에 영향을 미칠 수 있는 컴퓨터 쓰기에 대한 태도, 자기성찰 동기 수준에 대한 사전검사를 실시하였다. 이후 온라인 그룹토론 3회를 실시하였고, 참여도와 상호작용 데이터는 온라인 토론 시스템을 통해 자동으로 수집하였으며, 사후검사를 통해 학습성과 데이터를 수집하였다. 연구 결과 토론주제와 메시지유형 대시보드를 제공 받은 집단 B의 참여도 수준(M=47.56, SD=2.37)이 참여도와 상호작용 대시보드를 제공받은 집단 A의 참여도 수준(M=38.13, SD=2.21) 보다 유의하게 높은 것으로 나타났다. 반면 대시보드 유형이 상호작용과 학습성과에는 영향을 주지 않은 것으로 나타났다. 연구 결과를 종합해 볼 때 참여도와 상호작용에 대한 정보만 제공받은 집단보다 토론내용에 대한 질적 정보가 포함된 토론주제와 메시지유형 대시보드를 제공받은 집단이 토론에 대한 동기부여를 통해 참여도가 높게 나타난 것으로 해석할 수 있다. 이 연구에서는 학습자 특성변인을 고려하지 않고 대시보드 유형에 따른 효과만 검증하고자 하였는데, 선행연구에 의하면, 학습자 특성이 대시보드 활용에 영향을 줄 수 있으므로 추후 연구에서는 학습자 특성에 따른 대시보드 효과에 관한 연구를 수행할 것을 제안한다.

• 한국응용곤충학회지
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• 제54권2호
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• pp.137-144
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• 2015

식물은 유도저항성이나 천적류의 공격활동 변화를 유발하여 관련 초식성 곤충류 간 상호작용관계에 불리한 영향을 미칠 뿐만 아니라 식물체내 영양물질 동태나 타감물질 그리고 외부 형태적 변화 등을 통하여 초식곤충류에 유리한 영향을 미치기도 한다. 본고에서는 식물이 개재되었을 때 초식 곤충류간의 상호작용 관계와 초식성 곤충 가해에 대한 식물의 여러 가지 반응특성과의 관계나 곤충류 생활사 특성이 초식성 곤충군집의 구조에 미치는 영향을 살펴보고 그의 군집학적 의의를 고찰하였다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2011년도 제37회 추계학술대회논문집
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• pp.409-414
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• 2011

A projectile that passes through a shock wave experiences drastic changes in the aerodynamic forces. These sudden changes in the forces are attributed to the wave structures produced by the projectile-shock wave interaction. A computational study using moving grid method is performed to analyze the effect of the projectile-shock wave interaction. Cylindrical and conical projectiles have been employed to study such interactions. This sort of unsteady interaction normally takes place in overtaking blast flow fields. It is found that the overall effect of overtaking a blast wave on the unsteady aerodynamic characteristics is hardly affected by the projectile configurations. However, it is noticed that the projectile configurations do affect the unsteady flow structures and hence the drag coefficient for the conical projectile shows considerable variation from that of the cylindrical projectile. The projectile aerodynamic characteristics, when it interacts with the secondary shock wave, are analyzed. It is also observed that the change in the characteristics of the secondary shock wave during the interaction is different for different projectile configurations.

• 유통과학연구
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• 제18권1호
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• pp.59-69
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• 2020

Purpose: This study aims to examine such relationships as the experiential value that customers respond to with regard to maintenance service by empirically revealing how the quality of auto maintenance and repair service affects both customer satisfaction and intention to reuse the same service through the Perceived-experiential Value of customers. Research design, data and methodology: The research model was designed with service qualities such as human quality, material quality, interaction quality, and system quality as independent variables, perceived-experiential value as a parameter, and service satisfaction and return visit intention as dependent variables. Through a questionnaire composed of 24 items, a total of 319 survey data from customers with the experience of using car maintenance service centers in Korea were collected and analyzed using a structural equation. Results: The material quality did not affect the customers' perceived-experiential value, whereas the interaction quality had the greatest influence. It is confirmed that human quality, interaction quality, and system quality can generate customer satisfaction and repurchase intention through the perceived-experiential value. Conclusions: The experiential value of customers can play an important medium role in improving satisfaction, with customers considering interaction quality important. Therefore, the auto maintenance and repair service should consider relationship-focused service strategies.

• Steel and Composite Structures
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• 제8권2호
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• pp.145-158
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• 2008

In slender sections there is a substantial post-buckling strength provided after the formation of local buckling waves. These waves happened due to normal stresses or shear stresses or both. In this study, a numerical investigation of the behavior of slender I-section beams in combined pure bending and shear has been described. The studied cases were assumed to be prevented from lateral torsional buckling. To achieve this aim, a finite element model that simulates the geometric and material nonlinear nature of the problem has been developed. Moreover, the initial geometric imperfections were included in the model. Different flange and web width-thickness ratios as well as web panel aspect ratios have been considered to draw complete set of interaction diagrams. Results reflect the interaction behavior between flange and web in resisting the combined action of moments and shear. In addition, the web panel aspect ratio will not significantly affect the combined ultimate shear-bending strength as well as the post local buckling strength gained by the section. Results are compared with that predicted by both the Eurocode 3 and the American Iron and Steel specifications, AISI-2001. Finally, an empirical interaction equation has been proposed.

• Korea-Australia Rheology Journal
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• 제13권3호
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• pp.141-148
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• 2001

In this research, experimental studies leave been performed on the hydrodynamic interaction between a spherical particle and a plane wall by measuring the force between the particle and wall. To approach the system as a resistance problem, a servo-driving system was set-up by assembling a microstepping motor, a ball screw and a linear motion guide for the particle motion. Glycerin and dilute solution of polyacrylamide in glycerin were used as Newtonian and non-Newtonian fluids, respectively. The polymer solution behaves like a Boger fluid when the concentration is 1,000 ppm or less. The experimental results were compared with the asymptotic solution of Stokes equation. The result shows that fluid inertia plays all important role in the particle-wall interaction in Newtonian fluid. This implies that the motion of two particles in suspension is not reversible even in Newtonian fluid. In non-Newtonian fluid, normal stress difference and viscoelasticity play important roles as expected. In the dilute solution weak shear thinning and the migration of polymer molecules in the inhomogeneous flow field also affect the physic of the problem.

• Nuclear Engineering and Technology
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• 제48권2호
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• pp.448-456
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• 2016

Severe accident scenarios in nuclear reactors, such as nuclear meltdown, reveal that an extremely hot molten core may fall into the nuclear reactor cavity and seriously affect the safety of the nuclear containment vessel due to the chain reaction caused by the reaction between the molten core and concrete. This paper reports on research focused on the type and amount of vapor produced during the reaction between a high-temperature molten core and concrete, as well as on the erosion rate of concrete and the heat transfer characteristics at its vicinity. This study identifies themass fraction and melting temperature as the most influential properties of concrete necessary for a safety analysis conducted in relation to the thermal interaction between the molten core and the basemat concrete. The types of concrete that are actually used in nuclear reactor cavities were investigated. The $H_2O$ content in concrete required for the computation of the relative amount of gases generated by the chemical reaction of the vapor, the quantity of $CO_2$ necessary for computing the cooling speed of the molten core, and the melting temperature of concrete are evaluated experimentally for the molten core-concrete interaction analysis.

• 융합경영연구
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• 제11권1호
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• pp.1-12
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• 2023

Purpose: This study identified the effects of the three types of consumer interactions on the utilitarian and hedonic values experienced by community members, their degree of participation, and brand loyalty. In addition, the mediating effect of virtual interactivity between the interactions that occur within the online brand community and the value experienced by community members was also identified. Research design, data and methodology: An online survey was distributed, and the data gathered was analyzed using structural equations modeling. Results: Test results showed that product-information interaction has a positive effect on utilitarian value and interpersonal interaction has a positive effect on hedonic value. Human-computer interaction was found to have a negative effect on hedonic value and no significant effect on utilitarian value. Furthermore, it was revealed that among the three types of interactions, virtual interactivity had a mediating effect only in the relationship between human-computer interaction and hedonic value. Moreover, utilitarian values experienced by community members affected their level of participation which ultimately enhances brand loyalty. Hedonic value did not affect their level of participation within the online brand community. Conclusions: When marketers establish online brand community strategies, they must place elements that can directly help the use of brands and products.

• 한국프랜차이즈경영연구
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• 제15권3호
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• pp.45-55
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• 2024

Purpose: This study examines the impact of dessert cafe quality factors-interaction, environmental, outcome, and product quality-on hedonic and utilitarian values, satisfaction, and loyalty. It explores how these elements influence consumer behavior in the context of dessert cafe experiences. Research design, data and methodology: Data were collected from 563 consumers who visited dessert cafés within the last three months. The analysis was conducted using SPSS 28.0 and SmartPLS 4.0 to test the relationships among the café quality factors, consumption values, satisfaction, and loyalty. Result: Interaction, environmental, outcome, and product quality positively influenced hedonic value. Interaction and outcome quality impacted utilitarian value, while environmental and product quality did not. Satisfaction was positively affected by environmental and product quality but not by interaction or outcome quality. Satisfaction influenced loyalty, while neither hedonic nor utilitarian value significantly impacted loyalty. Conclusions: The study highlights the importance of understanding how different quality dimensions in dessert cafés affect consumer satisfaction and loyalty. The findings provide valuable insights for enhancing customer experiences and formulating effective marketing strategies in the dessert cafe industry.

• 한국콘텐츠학회논문지
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• 제8권10호
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• pp.114-128
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• 2008

최근 몇 년 동안 브랜드 커뮤니티에 대한 연구는 많은 반면에, UCC에 관련된 연구는 아직 미비한 실정이며, 또한 브랜드 커뮤니티에서의 UCC의 연구도 활발하게 진행되고 있지 못하다. 본 연구에서는 UCC를 하나의 새로운 현상으로 보는 것이 아니라 이러한 UCC가 브랜드커뮤니티에서 상호작용을 통해서 퍼뮤니케이션되는 현상을 학문적 연구를 통해 시사점을 제시하고 브랜드 커뮤니티에 관한 향후 연구의 방향을 제시하는데 목적이 있다. 이에 따라서 본 연구는 온라인 브랜드 커뮤니티에서의 UCC를 통한 상호작용이 펌 행위의도와 방문충성도에 미치는 영향에 대해 규명하고자 하였다. 연구결과를 살펴보면, 첫째, 브랜드 커뮤니티의 품질특성 중에서 정보성만이 모든 상호작용성에 정의 영향을 미치는 것을 알 수 있다. 둘째, 브랜드 커뮤니티의 신뢰 및 응답성 부분은 상호작용의 구성요인 중에서 연결성 부분에만 정의 영향을 미치는 것으로 나타났다. 셋째, 확신성은 상호작용요인 중에서 능동성과 연결성에만 정의 영향을 미치는 것을 알 수 있다. 다섯째, 공유의지가 상호작용의 구성요인 중에서 능동성과 연결성에는 영향을 미치고 있지만 반응성에는 영향을 미치지 못하는 것으로 나타났으며, 마지막으로 상호작용성이 펌 행위의도에 반응성 부분에만 영향을 미치지 못하였고, 방문충성도에는 모두 긍정적인 영향을 미쳤다. 앞에서 살펴본 내용을 바탕으로 브랜드 커뮤니티의 품질특성과 사용자특성요인 중에서 상호작용성에 많은 영향을 미치는 변수로 정보성, 확신성 그리고 사용자 특성요인인 공유의지를 들 수 있다.