• Journal of KIISE:Computer Systems and Theory
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• v.34 no.10
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• pp.474-492
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• 2007

In the protein interaction network, there are many meaningful functional modules, each involving several protein interactions to perform discrete functions. Pathways and protein complexes are the examples of the functional modules. In this paper, we propose a new method for detecting the functional modules based on concept. A conceptual functional module, briefly concept module is introduced to match the modules taking them as its instances. It is defined by the corresponding rule composed of triples and operators between the triples. The triples represent conceptual relations reifying the protein interactions of a module, and the operators specify the structure of the module with the relations. Furthermore, users can define a composite concept module by the counterpart rule which, in turn, is defined in terms of the predefined rules. The concept module makes it possible to detect functional modules that are conceptually similar as well as structurally identical to users' queries. The rules are managed in the XML format so that they can be easily applied to other networks of different species. In this paper, we also provide a visualized environment for intuitionally describing complexly structured rules.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.33 no.10
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• pp.820-826
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• 2009

The anisotropic phonon conductions with varying Joule heating rate of the silicon film in Silicon-on-Insulator devices are examined using the electron-phonon interaction model. It is found that the phonon heat transfer rate at each boundary of Si-layer has a strong dependence on the heating power rate. And the phonon flow decreases when the temperature gradient has a sharp change within extremely short length scales such as phonon mean free path. Thus the heat generated in the hot spot region is removed primarily by heat conduction through Si-layer at the higher Joule heating level and the phonon nonlocality is mainly attributed to lower group velocity phonons as remarkably dissimilar to the case of electrons in laser heated plasmas. To validate these observations the modified phonon nonlocal model considering complete phonon dispersion relations is introduced as a correct form of the conventional theory. We also reveal that the relation between the phonon heat deposition time from the hot spot region and the relaxation time in Si-layer can be used to estimate the intrinsic thermal resistance in the parallel heat flow direction as Joule heating level varies.

• The Journal of Industrial Distribution & Business
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• v.7 no.2
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• pp.25-32
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• 2016

Purpose - The objective of this study is to investigate the differences and interaction effects on the perceived financial risk between Korean and Thai consumers according to the types of product(utilitarian and hedonic) and price discount (bundle and 50%off). Research design, Data and Methodology - This paper sets up 6 research subjects. Data collection was carried out in Korea and Thailand. Data was made of 154 Korean and 147 Thai consumers. As for the independent variables for this study, consumer types are composed of Korean and Thai consumers, price discount types were bundle(1+1) and 50% off price, and product types consist of utilitarian and hedonic product. The dependent variable is perceived as a financial risk. Each question is measured as a Likert-type five-point scale. Results - According to the price discount and product type, perceived financial risk of Thai consumers is confirmed to be a larger one than that of Korean consumers. Also, there are interaction effects in the perceived financial risk. Conclusion - Our findings can be used as useful information for global retail markets as marketing strategies in future Korean enterprise through a comparative study on Korean and Thai consumers.

• Proceedings of the ESK Conference
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• 1997.04a
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• pp.165-175
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• 1997

Brain potential is described by using Euler Lagrange equation derived from Lagrangian based on SMNI(Statistical Mechanics of Neocortical Interaction). It is assumed that excitatory neuron firing is amplitude-modulated dominantly by the sum of two modes of frequency ${\omega}and 2 {\omega}$ . Time series of this neuron firing is numerically calculated. $I_{L}$related to low frequency distribution of power spectrum, $I_{H}$high frequency, and S(standard deviation) are introduced for the effective extraction of the dynamic property in this simulated brain potential. $I_{L}$,$I_{H}$, and S are obtained from EEG of 4 persons in rest state and are compared with thoretical results. It is of importance in various fields related to human well-being such as comfort-pursued industrial design, psychology, medicine to characterize human emotional states by EEG analysis. The pleasant and unpleasant sensation among various emotional states would be demonstrated to be determined in terms of ${\epsilon}$ and ${\gamma}$ parameters estimated by the simulated $I_{L}$-$I_{H}$-S relations.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.351-355
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• 2006

1990년대 후반 이후 등장한 N세대 N generation라는 신조어는 넓게는 '10대 후반과 20대 초반의 새로운 세대'라는 'new'의 개념에서의 N세대 new generation를, 좁게는 '네트워크 network를 자유자재로 다루는 세대' 또는 '네트워크 속에서 생활하는 세대' 라는 '디지털 유저 digital user'의 개념에서의 N세대 network generation를 의미한다. 다시 말해, N세대는 디지털 디바이스의 정보와 지식을 바탕으로 자유롭게 디지털 세상을 넘나드는 젊은 디지털 유저 층이다. 본 연구의 목적은 디지털 디바이스 프로덕트 광고의 한 사례를 기호학적으로 분석하여 '"디지털 디바이스+ N세대=디지털 코드"라는 광고공식'과 '외연과 내연이 합해져 "기술적 시니피앙과 감성적 시니피에"의 상호작용적 조합 interaction'을 찾아보는 것에 있다. 여기서는 광고 분석의 사례로써 삼성 KENOX V4 광고를 이용한다. KENOX V4 는 N세대를 겨냥한 디지털 디바이스 프로덕트이며, 이 광고는 '외국 브랜드를 제압하는 의미의 V'라는 코드를 사용하고 있다. 자기만의 주장을 당당하게 할 줄 아는 N세대가 소년기에 가졌던 한국이라는 자부심이 그가 성인기에 들어선 이후에도 V라는 승리의 표상으로 나타나고 있는 것이다. V4 광고의 이미지는 N세대를 상징하는 강력한 '디지털 코드digital code'를 담아내고 있으며, 그 V4의 메시지는 '4백만 화소'라는 '기술적 시니피앙 technological significant'과 '4가지 승리'라는 '감성적 시니피에 emotional signifie'의 상호작용적 조합을 구성하고 있다.

• Structural Engineering and Mechanics
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• v.75 no.1
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• pp.109-122
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• 2020

An asymptotic local plane strain elasticity theory is reformulated for the static analysis of a simply-supported, multiple graphene sheet system (MGSS) in cylindrical bending and resting on an elastic medium. The dimension of the MGSS in the y direction is considered to be much greater than those in the x and z directions, such that all the field variables are considered to be independent of the y coordinate. Eringen's nonlocal constitutive relations are used to account for the small length scale effects in the formulation examining the static behavior of the MGSS. The interaction between the MGSS and its surrounding foundation is modelled as a Winkler foundation with the parameter k_w, and the interaction between adjacent graphene sheets (GSs) is considered using another Winkler model with the parameter c_w. A parametric study with regard to some effects on the static behavior of the MGSS resting on an elastic medium is undertaken, such as the aspect ratio, the number of the GSs, the stiffness of the medium between the adjacent layers and that of the surrounding medium of the MGSS, and the nonlocal parameter.

• Journal of Educational Research in Mathematics
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• v.8 no.2
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• pp.405-423
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• 1998

This study aims to reflect the origin and the meaning of open education and to derive pedagogical principles for open mathematics education. Open education originates from Socrates who was the founder of discovery learning and has been developed by Locke, Rousseau, Froebel, Montessori, Dewey, Piaget, and so on. Thus open education is based on Humanism and Piaget's psychology. The aim of open education consists in developing potentials of children. The characteristics of open education can be summarized as follows: open curriculum, individualized instruction, diverse group organization and various instruction models, rich educational environment, and cooperative interaction based on open human relations. After considering the aims and the characteristics of open education, this study tries to suggest the aims and the directions for open mathematics education according to the philosophy of open education. The aim of open mathematics education is to develop mathematical potentials of children and to foster their mathematical appreciative view. In order to realize the aim, this study suggests five pedagogical principles. Firstly, the mathematical knowledge of children should be integrated by structurizing. Secondly, exploration activities for all kinds of real and concrete situations should be starting points of mathematics learning for the children. Thirdly, open-ended problem approach can facilitate children's diverse ways of thinking. Fourthly, the mathematics educators should emphasize the social interaction through small-group cooperation. Finally, rich educational environment should be provided by offering concrete and diverse material. In order to make open mathematics education effective, some considerations are required in terms of open mathematics curriculum, integrated construction of textbooks, autonomy of teachers and inquiry into children's mathematical capability.

• New & Renewable Energy
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• v.17 no.1
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• pp.7-18
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• 2021

This study analyzes the role of market actors in the energy transition process and the interaction between them and ordinary citizens, primarily focusing on the mini-PV project in Seoul. The study also proposes measures to harness market actors' activities and successfully implement the distribution of mini-PV systems in Seoul. In this study, practice theory is used as a theoretical resource to analyze the interaction between market actors and civil society actors and to help understand how market actors influence the decisions of regular citizens in installing mini-PV at their properties. After conducting surveys and hosting in-depth interviews with ordinary citizens and market actors, it was found that to further promote the role of market actors, the Seoul Metropolitan Government should actively support and monitor the public relations activities of market actors, while concurrently managing selected companies and establishing relevant administrative systems for continued effective use post-installation of mini-PV systems. In future studies of the energy transition process, market actors should also be recognized as key players, along with government and civil society actors, and their roles should be studied in a balanced way.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.3
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• pp.142-160
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• 2023

This research explores how different corporate cultures can influence the post-M&A performance of the airlines undergoing strategic M&A in Korea. The sample size of this research is 214 respondents that is strictly limited to the employees of airlines under M&A process, and CFA and SEM were employed for the statistical analysis. This research investigated that corporate cultures including group-oriented, development-oriented, and rationale-oriented will positively influence the post M&A performance of both efficiency and effectiveness through a mediation of collaboration during M&A process. In contrast, relations between grouporiented culture and interaction, interaction and effectiveness were not revealed positive influences. The findings of this research will provide valuable insights into the potential risks that can impede successful M&A within the M&A process, specially focusing on the conflicts between organizations stemming from different organizational cultures, which can have an adverse impact on M&A performance.

• Asia pacific journal of information systems
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• v.18 no.4
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• pp.83-103
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• 2008

In the new web based learning environment which has recently emerged, a variety of new learning objectives and teaching methods suited to this learning environment have been adopted. Recently, web based project-based learning methods have received a great deal of attention from those wishing to improve learning performance. The objective of this study is to identify the impact of characteristics of communication media and instruction behavior on collaborative interaction and project performance through web based group projects. The characteristics of communication media were divided into richness, flexibility, and ease of use, and the characteristics of instruction behavior were divided into support and expression, which are independent variables. Collaborative interaction as a mediate variable, was divided into information sharing and negotiation. Project performance was the dependent variable. To verify the proposed research model empirically, an experiment was conducted in which learners participated in on-line and off-line courses with group projects. The group project was conducted virtual product development(VPD), and designed a web-site about the VPD. At the end of the project, a survey was conducted. Of the 270 students, 239 responded. The students were assigned to groups of 3 or 4 members, and represented different genders and levels of computer competence. The reliability, validity, and correlation of research variables were analyzed using SPSS 14.0, and the measurement model and the structural goodness-of-fit of the research model were verified through SEM analysis using Lisrel 8.54. We found important results as follows; First, richness and ease of use has positive impacts on each of sharing information and negotiation. This suggests that richness and ease of use are useful in sharing information which is related to the task and agreeing in opinions among group members. However, flexibility has not positive impacts on sharing information and negotiation. This implies that there is no great difference in performance of PC and information literacy of user. Second, support and expression of instructor have positive impacts on sharing information and negotiation. This indicates that instructors play an important role in encouraging learners to participate in the project and communicating with them, sharing information related to the project, making a resonable decision and finally leading them to improve a project performance. Third, collaborative interaction has a positive impact on project performance. This result shows that if the ability to share information and negotiate among students was improved then a project performance would be improved as well. Recently, in the state of revitalized web based learning, it is opportune that web-based group project is practically conducted, and the impact of characteristics of communication media and characteristics of instruction behavior on sharing information, negotiating among group members and improving a project performance is verified. On the basis of these results, we propose that forms of learning, such as web based project, could be one of solution which is to enforce interaction among learners, and ultimately improve learning performance. Moreover web-based group project is able to make up for a weakness which makes it difficult to make interpersonal relations or friendship among learners in computer mediated communication or web based learning.