• Progress in Superconductivity
• /
• 제9권2호
• /
• pp.127-135
• /
• 2008

We study the effects of phonon interaction on the superconducting pairing in the high $T_c$ superconductors (HTSC). Using coupled BCS gap equations, we found that phonon interaction can induce a s-wave component to the d-wave gap, mediated by Antiferromagnetic (AFM) spin fluctuations, in the (D+iS) form. However, $T_c$ is not enhanced compared to the pure d-wave pairing without phonon interaction. On the other hand, anisotropic phonon interaction can dramatically enhance the d-wave pairing and $T_c$ itself, together with the AFM spin fluctuation interaction. This ($D_{AFM}+D_{ph}$) type pairing exhibits strongly reduced isotope coefficient despite the large enhancement of $T_c$ by phonon interaction.

• Steel and Composite Structures
• /
• 제13권2호
• /
• pp.109-122
• /
• 2012

An efficient and accurate algorithm is proposed to evaluate the reliability of cable-stayed bridges accounting for soil-pile interaction. The proposed algorithm integrates the finite-element method and the response surface method. The finite-element method is used to model the cable-stayed bridge including soil-pile interaction. The reliability index is evaluated based on the response surface method. Uncertainties in the superstructure, the substructure and load parameters are incorporated in the proposed algorithm. A long span steel cable-stayed bridge with a main span length of 1088 m built in China is considered as an illustrative example. The reliability of the bridge is evaluated for the strength and serviceability performance functions. Results of the study show that when strength limit states for both girder and tower are considered, soil-pile interaction has significant effects on the reliability of steel cable-stayed bridges. Further, a detailed sensitivity study shows that the modulus of subgrade reaction is the most important soil-pile interaction-related parameter influencing the reliability of steel cable-stayed bridges.

• Journal of Information Technology Applications and Management
• /
• 제13권2호
• /
• pp.41-54
• /
• 2006

In this paper, we investigate the inter-organizational information systems effect to supply chain partnerships, and subsequently to the performance. The conceptual model for the causal relationships among interorganizational systems usage, interaction, partnership, and supply chain performances has been developed. Theoretical framework is based on the partnership research in relationship marketing area, and the interaction model from IMP group. The questionnaires are designed to test the hypotheses of the conceptual model. The survey result supports our hypotheses that collaborative IT effects to increase the interaction between the firms, and interaction causes to enhance the partnership quality. Also, the level of partnership shows strong positive correlation with the supply chain performances. Despite the limitations of collected sample data size, our study reveals the fact that inter-organizational information systems contribute to supply chain performance through enhancing the interaction and partnership level between the supply chain partners. Our research result is distinct from the most extant literatures that investigated the firm's collaboration impact on interorganizational systems usage.

• 아동학회지
• /
• 제24권5호
• /
• pp.43-58
• /
• 2003

This research was conducted to comprehend the effects of computer games on the development children's visual perception. First, the effects of experience of computer games on children's visual perception abilities was analyzed. Second, the effects of different types of computer games on children's visual perception abilities were examined. And third, the interaction effects of sex and computer game types were examined. The subjects of this study were 78 5-year-olds engaging public kindergarten located in Cheung-Ju. To analyse data, percent, mean, standard deviation, and ANCOVA were used. The results showed that children's visual perception abilities were improved significantly with the experience of computer games. And the improvement of children's visual perception varied significantly according to the type of computer game. No interaction effects were found between a child's sex and the types of computer games.

• Structural Engineering and Mechanics
• /
• 제40권6호
• /
• pp.829-845
• /
• 2011

This paper evaluates the effects of topographical and geotechnical irregularities on the dynamic response of the 2-D soil-structure systems under ground motion by coupling finite and infinite elements. A numerical procedure is employed, and a parametric study is carried out for single-faced slope topographies. It is concluded that topographic conditions may have important effects on the ground motion along the slope. The geotechnical properties of the soil will also have significantly amplified effects on the whole system motion, which cannot be neglected for design purposes. So, dynamic response of a soil-structure systems are primarily affected by surface shapes and geotechnical properties of the soil. Location of the structure is another parameter affecting the whole system response.

• 한국보육지원학회지
• /
• 제14권3호
• /
• pp.41-58
• /
• 2018

Objective: The goal of this study is to research how mother's literacy interaction influences children's interest in vocabulary and reading. Methods: The research subjects selected were 120 children who were three to four-year-old and their mothers. This study conducted questionnaires about the literacy interaction of the mothers. This study also surveyed vocabulary and interest in reading of the children by directly visiting the institutes and by researching the subjects individually. This study used technical statistics, Person's product-moment correlation analysis, and multiple regression analysis in order to analyze the collected data. Results: The results of this study are summarized and concluded as follows. First, open interaction among the sub-areas of a mother's literacy interaction significantly affected children's vocabulary. Second, a mother's literacy interaction with children had no direct impact on the child's interest in reading. Conclusion/Implications: The mother's literacy interaction could have a correlation with the vocabulary development of three to four-year-old children, and a mother's application of open interaction could significantly influence the receptive vocabulary and expressive vocabulary of children.

• 대한기계학회논문집B
• /
• 제25권11호
• /
• pp.1518-1526
• /
• 2001

In this paper, the mechanism of unsteady potential interaction and wake interaction in one stage axial turbine is numerically investigated at design point in two-dimensional viewpoint. The numerical technique used is the upwind scheme of Van-Leer's Flux Vector Splitting (FVS) and Cubic spline interpolation is applied on zonal interface between stator and rotor. The inviscid analysis is used to embody the influence of potential interaction only and viscous analysis is used to embody the influences of both potential interaction and wake interaction at the same time. The potential-flow disturbance from the stator into a rotor passage and the periodic blockage effect of rotor produce the unsteady pressure on the blade surface in inviscid analysis. After the wake is cut by rotor, two counterrotating votical patterns flanking the wake centerline in the passage are generated. So, these phenomena magnify the unsteady pressure in viscous analysis than that in inviscid analysis. The resulting unsteady forces on the rotor, generated by the combined interaction of the two effects by potential and wake interaction, are discussed.

• 한국수학교육학회지시리즈A:수학교육
• /
• 제57권4호
• /
• pp.371-391
• /
• 2018

The purpose of this study is to analyze manifestation examples and effects of group creativity in mathematical modeling and to discuss teaching and learning methods for group creativity. The following two points were examined from the theoretical background. First, we examined the possibility of group activity in mathematical modeling. Second, we examined the meaning and characteristics of group creativity. Six students in the second grade of high school participated in this study in two groups of three each. Mathematical modeling task was "What are your own strategies to prevent or cope with blackouts?". Unit of analysis was the observed types of interaction at each stage of mathematical modeling. Especially, it was confirmed that group creativity can be developed through repetitive occurrences of mutually complementary, conflict-based, metacognitive interactions. The conclusion is as follows. First, examples of mutually complementary interaction, conflict-based interaction, and metacognitive interaction were observed in the real-world inquiry and the factor-finding stage, the simplification stage, and the mathematical model derivation stage, respectively. And the positive effect of group creativity on mathematical modeling were confirmed. Second, example of non interaction was observed, and it was confirmed that there were limitations on students' interaction object and interaction participation, and teacher's failure on appropriate intervention. Third, as teaching learning methods for group creativity, we proposed students' role play and teachers' questioning in the direction of promoting interaction.

• 경영정보학연구
• /
• 제12권3호
• /
• pp.117-139
• /
• 2010

온라인 게임은 그 자체를 즐기기 위한 대상이기도 하지만, 이를 통해 실생활의 시회적 관계를 강화하거나 연결하는 역할을 수행하기도 한다. 기존 연구들은 온라인 게임 경험이 실생활에 영향을 미치는, 즉 '온라인 게임 의존성'에 기초한 범람 효과에 대해서만 관성을 두어 왔다. 따라서 본 연구에서는 이전 문헌에서 간과한 '오프라인 의존성'이 온라인 행태에 영향을 미치는 범람 효과에 대해 살펴보았다. 이를 위해 경계이론 범람효과, 사회적 자본 사회적 상호작용, 충만감 중독 등의 이론에 근거하여, 충만감과 중독을 상호배타적인 구성개념으로 상정하여 종속변수로 두고, 숙련도, 도전감, 그리고 사회적 상호작용 등을 독립변수로, 그리고 오프라인 의존성을 사회적 상호작용의 조절변수로 하는 연구모델을 개발하였다. 연구모델을 실증하기 위해 온라인 게임 경험이 있는 사용자들 대상으로 온라인 설문 조사를 통해 얻은 197개의 유효한 데이터를 바탕으로 통계 분석을 하였다. 연구결과를 통해 충만감에는 숙련도, 도전감, 사회적 상호작용 모두 정의 영향을 주지만 중독에는 숙련도와 사회적 상호작용만이 정의 영향을 준다는 점을 밝혔다. 또한 오프라인 의존성에 대한 조절효과를 분석한 결과 오프라인 의존성아 낮은 집단이 높은 집단 보다 온라인 게임 중 사회적 상호작용을 활발히 하여 중독 성향이 높아지는 경향을 제시하고 있다.

• 감성과학
• /
• 제12권1호
• /
• pp.65-76
• /
• 2009

본 연구는 남녀 대학생을 대상으로 동일색조 코디네이션과 1:2:3면적비 변화에 따른 스트라이프 넥타이의 감성이미지와 상호작용효과를 알아보고자 한다. 이들 단서로 사용된 56개 자극물은 4가지 색조합, 2가지 색조, 7가지 면적비로 구성되었고, 감성이미지는 26개의 형용사쌍에 대해 7단계로 평가되었다. 조사대상자는 경남, 서울, 부산, 대구 등지에 거주하는 대학생 1344명의 피험자로 하였으며, 그 연구결과는 다음과 같다. 동일색조 코디네이션과 1:2:3면적비 변화에 따른 스트라이프 넥타이의 감성이미지를 요인분석한 결과 매력성, 젊음 활동성, 현시성, 능력성, 온유성의 5가지 차원으로 도출되었다. 색조합과 색조는 감성이미지의 모든 요인에서 독립적인 영향을 나타내었다. 또한 색조는 면적비와 상호작용하여 현시성과 능력성 요인에서 두드러진 단서로 작용하였다. 성별과 면적비는 젊음 활동성 요인에서, 성별과 색조는 온유성 요인에서, 색조합과 색조는 현시성과 온유성 요인에서 상호작용효과를 나타내었다. 이러한 연구결과는 남성 코디네이션을 위한 효과적인 기초자료로 활용될 것이다.