Sunchon National University is a national research university founded in 1935, located in Suncheon, Jeollanam-do, Korea.SNU composes six colleges and five professional schools, and a student body of about 26,000. College of Life Science and Natural Resources, College of Social science, College of Humanities and Arts, College of Engineering, College of Education, and College of Pharmacy.Also various and differentiated programs such as human resources exchanges with overseas leading universities, global overseas training, overseas culture expedition, etc. The university maintains an undergraduate exchange program with the University of Sheffield, University of Oklahoma, and University of Missouri. Wikipedia.
Seo J.-H.,Sunchon National University
Journal of Supercomputing | Year: 2013
A two-dimensional (2D) Petersen-torus network is a mesh-class fixed-degree network designed using a Petersen graph, which has a maximum of 10 nodes when the degree is 3 and the diameter is 2 in a (d,k)-graph problem. Here, I propose a new three-dimensional (3D) Petersen-torus network that extends the 2D Petersen-torus network without increasing the degree. The 3D Petersen-torus has the same number of nodes (N). The 3D Petersen-torus is better than the well-known 3D torus and 3D honeycomb mesh in terms of diameter and network cost. The 3D Petersen-torus network is better than the hypercube-like and star graph-like networks in terms of extendibility. Hence, the proposed network may serve as the foundation for realizing a high-performance multicomputer. In this paper, the optimal routing algorithm, Hamilton cycle, and several basic attributes are discussed. Furthermore, a comparison with a mesh-class fixed-degree 3D network is made for degree, diameter, and network cost. © 2011 Springer Science+Business Media, LLC.
Choi J.,Sunchon National University |
Zhang Y.,University of Missouri
International Journal of Thermal Sciences | Year: 2012
Laminar forced convection heat transfer of the Al 2O 3-water nanofluid in a pipe with a return bend is analyzed by using a finite element method. The results show that the average Nusselt number increases with increasing Reynolds number and Prandtl number, and the increment of specific heat in the nanofluid contributes to the heat transfer enhancement. The average Nusselt number in the return bend appears higher than that in the inlet and outlet pipes due to the secondary flows. However, the pressure drop in the pipe largely increases with the increment of nanoparticle volume concentration. The empirical correlations for the average Nusselt numbers are obtained as functions of the Dean number and the Prandtl number. © 2012 Elsevier Masson SAS. All rights reserved.
Nou I.-S.,Sunchon National University
BMC genomics | Year: 2014
BACKGROUND: LIM (Lin-11, Isl-1 and Mec-3 domains) genes have been reported to trigger the formation of actin bundles, a major higher-order cytoskeletal assembly, in higher plants; however, the stress resistance related functions of these genes are still not well known. In this study, we collected 22 LIM genes designated as Brassica rapa LIM (BrLIM) from the Brassica database, analyzed the sequences, compared them with LIM genes of other plants and analyzed their expression after applying biotic and abiotic stresses in Chinese cabbage.RESULTS: Upon sequence analysis these genes were confirmed as LIM genes and found to have a high degree of homology with LIM genes of other species. These genes showed distinct clusters when compared to other recognized LIM proteins upon phylogenetic analysis. Additionally, organ specific expression of these genes was observed in Chinese cabbage plants, with BrPLIM2a, b, c, BrDAR1, BrPLIM2e, f and g only being expressed in flower buds. Furthermore, the expression of these genes (except for BrDAR1 and BrPLIM2e) was high in the early flowering stages. The remaining genes were expressed in almost all organs tested. All BrDAR genes showed higher expression in flower buds compared to other organs. These organ specific expressions were clearly correlated with the phylogenetic grouping. In addition, BrWLIM2c and BrDAR4 responded to Fusarium oxysporum f. sp. conglutinans infection, while commonly two BrDARs and eight BrLIMs responded to cold, ABA and pH (pH5, pH7 and pH9) stress treatments in Chinese cabbage plants.CONCLUSION: Taken together, the results of this study indicate that BrLIM and BrDAR genes may be involved in resistance against biotic and abiotic stresses in Brassica.
Chung C.-H.,Sunchon National University
Geosciences Journal | Year: 2011
To investigate the Holocene vegetation and climate changes, pollen analysis performed on swamp deposits of the Boseong area, South Korea. From ca. 11,800 to 10,500 cal. yr BP, a cool temperate deciduous broadleaved forest dominated by Alnus and Quercus (Lepidobalanus) occupied the study area, indicating climatic warming during the Preboreal (earliest Holocene). A remarkable decrease in riparian Alnus and an increase in xerophytic Artemisia from ca. 10,500 to 8,400 cal. yr BP suggest open woodland with herbaceous understory reflecting a cool and dry condition. The expansion of deciduous broadleaved forest combined with rise in evergreen broadleaved taxa and the retreat of grassland between ca. 8,400 and 3,700 cal. yr BP indicate a vegetation shift from open woodland with herbaceous understory to warm temperate evergreen and deciduous broadleaved forests, resulted from climate amelioration during the Holocene climatic optimum. A warm and humid condition during this period is also evidenced by high values of pollen concentration. Vegetation change controlled by human impact occurred from ca. 3,700 to 2,900 cal. yr BP, as indicated by a rise in Pinus and Polypodiaceae and by high sedimentation rate. Along with the late Holocene climatic cooling, human impact brought about the development of Pinus dominated open woodland with a fern (Polypodiaceae) understory in the Boseong area. © 2011 The Association of Korean Geoscience Societies and Springer.
Kang H.,University of California at Berkeley |
Kitsomboonloha R.,University of California at Berkeley |
Jang J.,University of California at Berkeley |
Subramanian V.,University of California at Berkeley |
Subramanian V.,Sunchon National University
Advanced Materials | Year: 2012
Using a novel high-speed, femtoliter-scale, micro-gravure printing with unprecedented scaling to the sub-10 μm regime and appropriately formulated, characterized, and optimized nanoparticle and polymer ink materials, highly scaled organic thin-film-transistors (OTFTs) are realized. They have excellent DC and AC characteristics and achieve record transition frequencies of 300 kHz, which opens up new classes of applications. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.