• Journal of the Korean Physical Society
• /
• 제73권10호
• /
• pp.1406-1409
• /
• 2018

We have frequently encountered the rapid changes that prevalent opinion of the social community is toppled by a new and opposite opinion against the pre-exiting one. To understand this interesting process, mean-field model with infinite-interaction range has been mostly considered in previous studies S. A. Marvel et al., Phys. Rev. Lett. 110, 118702 (2012). However, the mean-field interaction range is lack of reality in the sense that any individual cannot interact with all of the others in the community. Based on it, in the present work, we consider a simple model of opinion consensus so-called basic model on the low-dimensional lattices (d = 1, 2) with finite interaction range. The model consists of four types of subpopulations with different opinions: A, B, AB, and the zealot of A denoted by $A_c$, following the basic model shown in the work by S. A. Marvel et al.. Comparing with their work, we consider the finite range of the interaction, and particularly reconstruct the lattice structure by adding new links when the two individuals have the distance < ${\sigma}$. We explore how the interaction range ${\sigma}$ affects the opinion consensus process on the reconstructed lattice structure. We find that the critical fraction of population for $A_c$ required for the opinion consensus on A shows different behaviors in the small and large interaction ranges. Especially, the critical fraction for $A_c$ increases with the size of ${\sigma}$ in the region of small interaction range, which is counter-intuitive: When the interaction range is increased, not only the number of nodes affected by $A_c$ but also that affected by B grows, which is believed to cause the increasing behavior of the critical fraction for $A_c$. We also present the difference of dynamic process to the opinion consensus between the regions of small and large interaction ranges.

• 전력전자학회논문지
• /
• 제25권6호
• /
• pp.459-468
• /
• 2020

The pole interaction of the line-commutated converter high-voltage direct current (HVDC) is analyzed, and a practical solution that uses a surge arrester is proposed. Jeju HVDC No. 2 is a double-monopole HVDC link that has a rated power capacity of 2 × 200 MW and was commissioned in 2012. During normal operation, Jeju HVDC No. 2 is operated in the bipolar mode to minimize the loss caused by the dedicated metallic return. However, when one pole of the inverter valve is bypassed, a commutation failure can occur in the other pole. This phenomenon is called pole interaction in this work. This pole interaction interrupts the HVDC power transfer for almost 2 s and may affect the stability of the power system. This research proposes the installation of a surge arrester at the inverter neutral, which can be an effective and practical solution for pole interaction. The HVDC system is analyzed, and the residual voltage of the surge arrester is determined. Detailed simulation using PSCAD/EMTDC demonstrates that the proposed method eliminates the pole interaction of the bipolar-operated HVDC.

• 한국게임학회 논문지
• /
• 제19권6호
• /
• pp.117-132
• /
• 2019

이 글의 목적은 게임에서의 상호작용의 특수성에 대한 고찰이다. 여기서 다룰 상호작용성은 사회과학적 상호작용과는 다른, 철학적 맥락에서 이해되어야 할 상호작용성이다. 상호작용의 특수성을 규명하기 위해서는 다음의 절차가 요구된다. 첫째, 상호작용성의 외재적 성격의 검토, 둘째, 상호작용성의 내재적 이해, 셋째, 게이머의 양면성 파악, 넷째, 게이머의 상호작용의 의미해석이다. 이 글의 결론은 다음과 같다. 상호작용의 특수성은 게이머가 처한 이중의 사태를 토대로 기존 관점의 전향을 이끄는 유희적이고 존재론적인 힘으로 나타난다.

• Interaction and multiscale mechanics
• /
• 제2권1호
• /
• pp.15-30
• /
• 2009

The theoretical framework of the interaction fields for multiple scales based on field theory is applied to one-dimensional problem mimicking dislocation substructure sensitive intra-granular inhomogeneity evolution under fatigue of Cu-added steels. Three distinct scale levels corresponding respectively to the orders of (A)dislocation substructures, (B)grain size and (C)grain aggregates are set-up based on FE-RKPM (reproducing kernel particle method) based interpolated strain distribution to obtain the incompatibility term in the interaction field. Comparisons between analytical conditions with and without the interaction, and that among different cell size in the scale A are simulated. The effect of interaction field on the B-scale field evolution is extensively examined. Finer and larger fluctuation is demonstrated to be obtained by taking account of the field interactions. Finer cell size exhibits larger field fluctuation whereas the coarse cell size yields negligible interaction effects.

• 한국지진공학회:학술대회논문집
• /
• 한국지진공학회 1997년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 1997
• /
• pp.109-116
• /
• 1997

The contiguous or adjacent foundations are always coupled through the soil. Hence their behavior is quite different due to the interaction effects between or among the foundations. The interaction effects can be very pronounced if the distance between them is very close. An 3-D homogeneous strip hyperelement is developed to analyze the dynamic interaction between rectangular or irregular shape found ations. The effects of interaction on the dynamic behaviors of the adjacent rigid rectangular foundations. The effects of interaction on the dynamic behaviors of the adjacent rigid rectangular foundations. The effects of interaction on the dynamic behaviors of the adjacent rigid rectangular foundations resting on the surface of a stratum are stratum are studied using the newly developed method.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제7권5호
• /
• pp.920-938
• /
• 2015

In the present study, a numerical prediction method on the hydrodynamic interaction force and moment between two ships in shallow and restricted waterway is presented. Especially, the present study proposes a methodology to overcome the limitation of the two dimensional perturbation method which is related to the moored-passing ship interaction. The validation study was performed and compared with the experiment, firstly. Afterward, in order to propose a methodology in terms with the moored-passing ship interaction, further studies were performed for the moored-passing ship case with a Reynolds Averaged Navier-Stokes (RANS) calculation which is using OpenFOAM with Arbitrary Coupled Mesh Interface (ACMI) technique and compared with the experiment result. Finally, the present study proposes a guide to apply the two dimensional perturbation method to the moored-passing ship interaction. In addition, it presents a possibility that the RANS calculation with ACMI can applied to the ship-ship interaction without using a overset moving grid technique.

• 대한의용생체공학회:의공학회지
• /
• 제43권2호
• /
• pp.71-80
• /
• 2022

The interaction between dual-ligand decorated particle-based delivery system and target cell under shear flow is predicted using probability model developed. We assumed the two kinds of ligand are decorated on the surface of the particle with 10% length difference. Fixed with other biophysical parameters, a study on the particle-cell interaction for the different non-specific interaction parameter is performed. To induce the firm adhesion, short ligand-receptor should be engaged. Also, it is shown that the rational design of ligand-receptor interaction, including receptor number, specific interaction parameter, kinds of ligand-receptor, etc., should be considered.

• 대한기계학회논문집B
• /
• 제26권9호
• /
• pp.1319-1324
• /
• 2002

A theoretical model on shock-vortex interaction is investigated using a numerical technique to solve Navier-Stokes equations. The shock-vortex interaction generated by this model based on the classical Rankin vortex is precisely investigated for a benchmark problem: Dosanjh and Weeks experiment. In terms of shock dynamics, the interaction is categorized to three stages: shock distortion, shock split, and shock-shock interaction. The quadrupolar structure of the sound source produced by the interaction is far supported with the present model, and the difference between experiment and theoretical model is also discussed in this paper.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2004년도 ICCAS
• /
• pp.1121-1125
• /
• 2004

The RT(Robot Technology) has been developed as the next generation of a future technology. According to the 2002 technical report from Mitsubishi R&D center, IT(Information Technology) and RT(Robotic Technology) fusion system will grow five times larger than the current IT market at the year 2015. Moreover, a recent IEEE report predicts that most people will have a robot in the next ten years. RCP(Robotic Cellular Phone), CP(Cellular Phone) having personal robot services, will be an intermediate hi-tech personal machine between one CP a person and one robot a person generations. RCP infra consists of $RCP^{Mobility}$, $RCP^{Interaction}$, $RCP^{Integration}$ technologies. For $RCP^{Mobility}$, human-friendly motion automation and personal service with walking and arming ability are developed. $RCP^{Interaction}$ ability is achieved by modeling an emotion-generating engine and $RCP^{Integration}$ that recognizes environmental and self conditions is developed. By joining intelligent algorithms and CP communication network with the three base modules, a RCP system is constructed. Especially, the RCP interaction system is really focused in this paper. The $RCP^{interaction}$(Robotic Cellular Phone for Interaction) is to be developed as an emotional model CP as shown in figure 1. $RCP^{interaction}$ refers to the sensitivity expression and the link technology of communication of the CP. It is interface technology between human and CP through various emotional models. The interactive emotion functions are designed through differing patterns of vibrator beat frequencies and a feeling system created by a smell injection switching control. As the music influences a person, one can feel a variety of emotion from the vibrator's beats, by converting musical chord frequencies into vibrator beat frequencies. So, this paper presents the definition, the basic theory and experiment results of the RCP interaction system. We confirm a good performance of the RCP interaction system through the experiment results.

• 한국초등수학교육학회지
• /
• 제14권3호
• /
• pp.681-700
• /
• 2010

최근 수학적 의사소통에 대한 중요성이 강조됨에 따라, 수학적 의사소통이라는 것이 초등 수학교실에서 어떻게 이루어지고 있으며, 수학적 사고와 관련하여 바람직한 수학적 의사소통 유형이 무엇인지 알아보는데 연구 목적을 두고 있다. 수학적 의사소통의 유형을 IRE형, 깔때기형(funnel pattern), 초점형(focus pattern)으로 나누었고, 수학적 의사소통 유형에 따른 수학적 사고와의 관계를 알아보고자 인지하기(recognize), 형성하기(building-with), 구성하기(constructing)으로 나누어 살펴보았다. 초등 수학 교실에서 나타나는 수학적 의사소통의 유형은 IRE형, 깔때기형, 초점형이 나타나는데, 그 발생정도는 교사의 수업 방식에 영향을 받고 있었으며, 수학적 의사소통 유형에 따른 수학적 사고수준은 그 유형에 따라 수학적 사고의 수준이 영향을 받는다. 따라서 수학적 사고 수준과 관련된 바람직한 수학적 의사소통 유형의 수학적사고 수준을 높게 일으키는 유형이다. 수학적 의사소통은 교사와 학생의 활발한 상호작용의 발생 빈도보다는 수학적 사고를 높이 게 할 수 있는 수학적 의사소통이 필요하다. 이런 부분에서 수학적 의사소통은 학생들의 수학적 사고를 높일 수 있는 수학적 의사소통인 초점형 의사소통을 통해 초등 수학 교실에서 나아가야 할 바람직한 수학적 의사소통 유형이다.