• 한국IT서비스학회지
• /
• 제14권3호
• /
• pp.217-236
• /
• 2015

How does social interaction among investors affect decision-making in the online social lending platform? And what is the reason? In this study, in order to obtain the answer, we carried out case study research of Moneyauction and Popfunding, which are domestic online social lending platforms. We conducted interviews with managements of both social lending platforms and investors and analyzed statistical data including investment records, social interaction history between investors and lenders from both platforms. In addition, researchers performed direct participation and observation through the platforms as real investment members. As a result, we revealed that social interaction among investors has a material impact on the investment decision-making. Also we found that investors build trust by socially interacting with each other and this trust building leads to the investment decision making. Our findings confirm that social lending investors's decision-making process comply with the social embeddedness theory and imply that loan applicants must do their best efforts to display sincerity and truthfulness through their posting.

• 한국융합학회논문지
• /
• 제11권6호
• /
• pp.15-21
• /
• 2020

전자상거래 생방송은 최근 몇 년 동안 중국에서 점차 유행하고 있는 새로운 온라인 쇼핑 방식이다. 생방송 기술에 의해 탄생한 전자상거래 생방송에서 수많은 사람들이 생방송을 보고 온라인 인터랙티브에 참여함으로써 구매 집단으로 응집되어 인터랙티브에서 안정적인 감정 에너지를 얻게 된다. 미시적 사회학적 시각에 기초하여 정서적 에너지 개념을 결합하고 인터랙티브 의식 체인 모델에 의해 전자상거래 생방송의 의식 구성요소를 볼 수 있으며, 어떻게 개인이 사회적 인터랙티브에서 구매 집단으로 뭉칠 수 있는지를 보여줄 수 있다. 인터랙티브 의식 이론에 대해 학계는 심도 있는 탐구를 하여 인터랙티브 의식 이론을 현실에 적용하려 하였다. 하지만 전자상거래 생방송의 인터렉티브 의식 이론에 대한 해석이 아직 문헌자료가 되지 않았는데, 저는 생방송 상황 중의 인터랙티브를 연구 대상으로 하고 인터랙티브 의식 이론으로 이 현상을 관찰한 다음에 전자 상거래 생방송 그룹의 인터렉티브 의식 체인 모델을 제시한다.

• 산업경영시스템학회지
• /
• 제41권1호
• /
• pp.24-38
• /
• 2018

Since a social networking service (SNS) isconsidered as an effective means to communicate and interact with customers, companies are trying to utilize SNS effectively. There is a lack of theory relating to the attributes of SNS. This study aims to investigate the attributes of SNS to classify SNS. Based on the social network theory, and previous studies on internet, blog, homepage, communication attributes, this study proposes the seven attributes to classify SNS: interaction, communication, entertainment, information, sharing, intimacy and connection. A pre-test, a pilot test and a main test are conducted. In the main test, 239 SNS users are participated. Through a factor analysis this study verifies the seven attributes of SNS. An analysis of variance with multiple comparisons of $Scheff{\acute{e}}$ method identifies that three attributes, interaction, communication and connection, are found to play significant roles to differentiate SNS. Looking at the overall mean values of the SNS by attribute, interaction, sharing, entertainment, intimacy and communication were relatively high in Facebook. Facebook showed higher values in attributes of interaction, sharing, entertainment, intimacy and communication. Twitter shows the relatively high scores for information and connection. Regarding interaction, Facebook shows higher scores than Twitter and Cyworld. For connection, Cyworld showed a significantly lower score than Twitter and Facebook. Cyworld was separated from the others in the light of communication. Cyworld is relatively weak in communication as it is limited to the message exchanges. The results will help in identifying major attributes for each SNS and classifying SNS.

• Steel and Composite Structures
• /
• 제48권6호
• /
• pp.693-708
• /
• 2023

Composite beams, two materials joined together, have become more common in structural engineering over the past few decades because they have better mechanical and structural properties. The shear connectors between their layers exhibit some deformability with finite stiffness, resulting in interfacial shear slip, a phenomenon known as partial shear interaction. Such a partial shear interaction contributes significantly to the composite beams. To provide precise predictions of the geometric nonlinear behavior shown by two-layered composite beams with interfacial shear slips, a robust analytical model has been developed that incorporates the influence of significant displacements. The application of a higher-order beam theory to the two material layers results in a third-order adjustment of the longitudinal displacement within each layer along the depth of the beam. Deformable shear connectors are employed at the interface to represent the partial shear interaction by means of a sequence of shear connectors that are evenly distributed throughout the beam's length. The Von-Karman theory of large deflection incorporates geometric nonlinearity into the governing equations, which are then solved analytically using the Navier solution technique. Suggested model exhibits a notable level of agreement with published findings, and numerical outputs derived from finite element (FE) model. Large displacement substantially reduces deflection, interfacial shear slip, and stress values. Geometric nonlinearity has a significant impact on beams with larger span-to-depth ratio and a greater degree of shear connector deformability. Potentially, the analytical model can accurately predict the geometric nonlinear responses of composite beams. The model has a high degree of generality, which might aid in the numerical solution of composite beams with varying configurations and shear criteria.

• 한국해양공학회지
• /
• 제30권3호
• /
• pp.151-160
• /
• 2016

The diffraction and radiation of linear waves by an array of truncated floating multiple buoys are solved using the interaction theory based on a matched eigenfunction expansion method (MEEM). The interaction processes between multiple buoys are very complex and numerous, because the scattered and radiated waves from each buoy affect the others in the array. Our primary aim is therefore to construct the rigorous wave exciting forces and hydrodynamic forces to deal with the problem of multiple interactions. This present method is applied to a square array of four buoys with two incidence angles, and the results are given for the wave excitation forces on each buoy, heave RAO for each buoy heaving independently, and wave elevations around the buoys and wave run-up. The analytical solutions are in good agreement with the numerical solutions obtained from commercial code (WAMIT).

• 수산해양기술연구
• /
• 제28권1호
• /
• pp.93-103
• /
• 1992

The hydrodynamic interaction characteristics between multiple floating bodies of semisubmersible type are examined for presenting the basic data for the design of huge offshore structures supported by a large number of the floating bodies in waves. The numerical approach is based on combination of a three-dimensional source distribution method and interaction theory which is exact within the context of linear potential theory. The method is applicable to an arbitrary number of three-dimensional bodies having any individual body geometries and geometrical arrangement with the restriction that the circumscribed, bottom-mounted, imaginary vertical cylinder for each body does not contain any part of the other body. The validity of this procedure was verified by comparing with numerical results obtained in the literature.

• Structural Engineering and Mechanics
• /
• 제89권2호
• /
• pp.135-153
• /
• 2024

In this study, the impact response of a nanobeam with a moving nanoparticle is investigated. Timoshenko beam theory is used to model the nanobeam behavior and nonlocal elasticity theory is used to consider the effects of small dimensions. The interaction between the nanoparticle and nanobeam has been described using Lennard-Jones potential theory and the equations are discretized by the radial basis meshless method and a mathematical model is presented for the nanobeam-nanoparticle system. Validation of the proposed model is achieved by comparing the obtained natural frequencies with reference values, demonstrating good agreement. Dimensionless frequency analysis reveals a decrease with increasing nonlocal parameter, pointing out a toughening effect in nanobeam. The dynamic response of the nanobeam and nanoparticle is obtained by time integration of equations of motion using Newmark and Wilson-𝜃 methods. A comparative analysis of the two methods is conducted to determine the most suitable approach for this study. As a distinctive aspect in this study, the analysis incorporates the deformation of the nanobeam resulting from the nanoparticle-nanobeam interaction when calculating the Lennard-Jones force in the nanobeam-nanoparticle system. The numerical findings explore the impact of various factors, including the nonlocal parameter, initial velocity, nanoparticle mass, and boundary conditions.

• 과학기술학연구
• /
• 제2권1호
• /
• pp.135-156
• /
• 2002

기술을 보는 입장은 기술 자체의 논리와 추동력을 인정하는 자율적 기술론과 기술을 정치적 선택의 산물로 간주하는 사회결정론으로 크게 구분된다. 전자(기술의 지배)는 우리 사회를 기술의 언어로 읽고, 후자(정치의 지배)는 우리의 기술을 사회의 언어로 읽는다. 이 글에서는 우리나라의 원자력 정책, 특히 방사성폐기물 처분 정책을 둘러싸고 형성된 정부와 환경단체의 대립관계는 자율적 기술론자(기술)와 사회 결정론자(정치)의 충돌이 반영된 것이라고 분석한다. 그리고 이 충돌은 겉으로는 합리성, 윤리성, 경제성 등의 측면에서 발생하지만, 심층적으로는 기술이 파생시킨 문제의 해결수단에 대한 충돌이라고 주장한다. 또한, 불가피한 양자의 충돌을 피하기 위해서는 기술과 정치의 상호작용 이론에 근거한 접근방식이 한가지 대안이 될 수 있음을 제안한다. 그리고 이러한 접근방식의 토대가 되는 기술의 정치적 속성과 통제 가능성에 대한 폭넓은 이해를 요청한다. 끝으로 우리나라 원자력 이용의 미래 모습이라고 할 수 있는 프랑스(원자력 이용 확대)와 독일(원자력 이용 축소)의 사례를 제시하였다.

• 한국소음진동공학회논문집
• /
• 제22권8호
• /
• pp.763-770
• /
• 2012

The free vibration characteristics of fluid-filled cylindrical shells on partial elastic foundations are investigated by an analytical method. The cylindrical shell is fully or partially surrounded by the elastic foundations, these are represented by the Winkler or Pasternak model. The motion of shell is represented by the first order shear deformation theory to account for rotary inertia and transverse shear strains. The steady flow of fluid is described by the classical potential flow theory. The fluid-structure interaction is considered in the analysis. The effect of internal fluid can be considered by imposing a relation between the fluid pressure and the radial displacement of the structure at the interface. To validate the present method, the numerical example is presented and compared with the available existing results.

• Coupled systems mechanics
• /
• 제6권3호
• /
• pp.369-376
• /
• 2017

Intermolecular interaction energies and conformer geometries of the hydrogen bonded acrylamide dimers have been studied by using the second-order Møller-Plesset (MP2) perturbation theory and the density functional theory (DFT) with 17 density functionals. Dunning's correlation consistent basis sets (up to aug-cc-pVTZ) have been used to study the basis set effects. The DFT calculated interaction energies are compared to the reference energy data calculated by the MP2 method and the coupled cluster method at the complete basis set (CCSD(T)/CBS) limit in order to determine the relative performance of the studied density functionals. Overall, dispersion-energy-corrected density functionals outperform uncorrected ones. The ${\omega}B97XD$ density functional is particularly effective in terms of both accuracy and computational cost in estimating the reference energy values using small basis sets and is highly recommended for similar calculations for larger systems.