Gangneung–Wonju National University is a national research university in Gangneung, Korea. Founded in 1946, GWNU is situated on the East coast of South Korea has risen to one of the research universities in South Korea. Following the merger between Kangnung National University and Wonju College on March 1, 2007, the name of the university changed to Gangneung–Wonju National University . Through this unification, GWNU will continue to spread its activity nationwide and beyond.GWNU is recognized as one of the preeminent research universities ranked 1st among Korean universities and 6th among Asian universities with regard to number of research papers in the 2009 Asia QS Universities Evaluation.Situated near the Sea of Japan coastal region, GWNU has taken advantage of its location, focusing its education on new materials, marine resources, tourism and IT. In addition, the university, as a global exchange hub-university linking the East Asian region, has formed academic agreements with 40 foreign universities, pursuing academic exchanges with students, faculties and staff and is growing into an international research institution in the growing global community. Currently, GWNU has about 200 international students from China, Russia, Japan, South-east Asia and the U.S.A. Wikipedia.
Yoon M.-G.,Gangneung - Wonju National University |
Tsumura K.,Tokyo University of Information Sciences
Automatica | Year: 2011
This paper presents explicit forms of transfer functions for a class of cyclic consensus systems with different kinds of network topologies; directed, undirected and different numbers of reference agents. Each agent of consensus systems is assumed to satisfy a scalar integrator dynamics which is driven by a common consensus protocol and an independent exogenous input. It is shown that every single-input single-output (SISO) transfer function between the exogenous input of one agent and the state of another generally different agent, is always minimum phase. In addition, the poles and zeros, system degrees and relative degrees of those SISO transfer functions are specified. These results are interpreted in relation to the controllability and closed loop performance of a networked system with one leader agent. Furthermore, our transfer function representations are applied to an investigation of stability margins for a closed loop cyclic consensus system. © 2011 Elsevier Ltd. All rights reserved.
Jeon C.,Gangneung - Wonju National University
Journal of Industrial and Engineering Chemistry | Year: 2011
Rice hulls which have some functional groups like hydroxyl, carboxyl and amino groups were used as an adsorbent to remove copper ions. The functional groups and composition of elements in rice hulls were confirmed by the FT-IR and elemental analysis. Rice hulls had a high uptake capacity of 0.18. mmol/g-dry mass for copper ion at pH 4 and regression curve using Langmuir isotherm equation fit well with the experimental data. The effects of pH, loading amount, time, and organic material (NTA) on uptake capacity of copper ions were investigated. The optimal pH for copper ion uptake was the 4 and rice hulls could remove copper ions of about 33% with 5.0. g of loading amount. Adsorption process of copper ions was almost completed in 30. min and effect of NTA on copper uptake capacity was very small in low concentration (<100. mg/L). © 2011 The Korean Society of Industrial and Engineering Chemistry.
Sohn S.-I.,Gangneung - Wonju National University
Physics of Fluids | Year: 2014
Evolving vortex sheets generally form singularities in finite time. The vortex blob model is an approach to regularize the vortex sheet motion and evolve past singularity formation. In this paper,we thoroughly compare two such regularizations: the Krasnytype model and the Beale-Majda model. It is found from a linear stability analysis that both models have exponentially decaying growth rates for high wavenumbers, but the Beale-Majda model has a faster decaying rate than the Krasny model. The Beale-Majda model thus gives a stronger regularization to the solution.We apply the blob models to the two example problems: a periodic vortex sheet and an elliptically loaded wing. The numerical results show that the solutions of the two models are similar in large and small scales, but are fairly different in intermediate scales. The sheet of the Beale-Majda model has more spiral turns than the Krasny-type model for the same value of the regularization parameter δ. We give numerical evidences that the solutions of the two models agree for an increasing amount of spiral turns and tend to converge to the same limit as δ is decreased. The inner spiral turns of the blob models behave differently with the outer turns and satisfy a self-similar form. We also examine irregular motions of the sheet at late times and find that the irregular motions shrink as δ is decreased. This fact suggests a convergence of the blob solution to the weak solution of infinite regular spiral turns. © 2014 AIP Publishing LLC.
Lee K.T.,Gangneung - Wonju National University
Meat Science | Year: 2010
This article explores the effects of physically manipulated packaging materials on the quality and safety of meat products. Recently, innovative measures for improving quality and extending the shelf-life of packaged meat products have been developed, utilizing technologies including barrier film, active packaging, nanotechnology, microperforation, irradiation, plasma and far-infrared ray (FIR) treatments. Despite these developments, each technology has peculiar drawbacks which will need to be addressed by meat scientists in the future. To develop successful meat packaging systems, key product characteristics affecting stability, environmental conditions during storage until consumption, and consumers' packaging expectations must all be taken into consideration. Furthermore, the safety issues related to packaging materials must also be taken into account when processing, packaging and storing meat products. © 2010 The American Meat Science Association.
Yoon M.-G.,Gangneung - Wonju National University
IET Control Theory and Applications | Year: 2012
The problem of controlling a single agent in a multi-agent consensus system is studied in order to make states of all agents in the system follow a common reference signal. It is shown that if every two agents in a given system are connected and a reference signal is a step function, then every controller locally stabilising one single agent gives rise to a successful tracking of all agents. When a proportional control is employed, the relations between overall tracking performance, interconnection topology and the choice of a controlled agent are analytically investigated. A numerical study is also performed to substantiate theoretical findings. © 2012 The Institution of Engineering and Technology.