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Landau-Ginzburg/Calabi-Yau Correspondence via Wall-Crossing

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Chinese Annals of Mathematics,Series B 2017年第4期38卷 883-900页

作者： Jinwon choi Young-Hoon KIEM Department of Mathematics Sookmyung Women’s University Department of Mathematics Seoul National University

Landau-Ginzburg/Calabi-Yau correspondence claims the equivalence between the Gromov-Witten theory and the Fan-Jarvis-Ruan-Witten theory. The authors survey recently developed wall-crossing approach to the Landau-Ginzb... 详细信息

关键词： Gromov-Witten invariant Fan-Jarvis-Ruan-Witten invariant Moduli space Quasimap Wall-crossing

Impact of power system network topology errors on real-time locational marginal price

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Journal of Modern Power Systems and Clean Energy 2017年第5期5卷 797-809页

作者： Dae-Hyun choi Le XIE School of Electrical and Electronics Engineering Chung-ang UniversityDongjak-guSeoul 156-756Republic of Korea Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTXUSA

This paper examines the impact of power transmission network topology change on locational marginal price(LMP) in real-time power markets. We consider the case where the false status of circuit breakers(CBs) that bypass topology error processing can generate an incorrect power system network topology, subsequently distorting the results of the state estimation and economic *** main goal of this paper is to assess the economic impact of this misconfigured network topology on realtime LMP in an entire power system with network congestion. To this end, we start with our prior result, a simple and analytical congestion price equation, which can be applied to any single line congestion scenario. This equation can be extended to better understand the degree to which the LMP at any bus changes due to any line status error. Furthermore, it enables a rigorous analysis of the relationship between the change in LMP at any bus with respect to any line error and various physical/economical grid conditions such as the bidding prices for marginal generators and the locations of the congested/erroneous lines. Numerical examples on the impact analysis of this topology error are illustrated in IEEE 14-bus and 118-bus systems.

关键词： Power market Economic dispatch Locational marginal price Power system network topology

Roles of lignin biosynthesis and regulatory genes in plant development

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Journal of Integrative Plant Biology 2015年第11期57卷 902-912页

作者： Jinmi Yoon Heebak choi Gynheung An Crop Biotech Institute Kyung Hee University Department of Life Science Pohang University of Science and Technology Graduate School of Biotechnology Kyung Hee University

Lignin is an important factor affecting agricultural traits, biofuel production, and the pulping industry. Most lignin biosynthesis genes and their regulatory genes are expressed mainly in the vascular bundles of stems and leaves, preferentially in tissues undergoing Iignification. Other genes are poorly expressed during normal stages of development, but are strongly induced by abiotic or biotic stresses. Some are expressed in non-lignifying tissues such as the shoot apical meristem. Alterations in lignin levels affect plant develop- ment. Suppression of lignin biosynthesis genes causes abnormal phenotypes such as collapsed xylem, bending stems, and growth retardation. The loss of expression by genes that function early in the lignin biosynthesis pathway results in more severe developmental phenotypes when compared with plants that have mutations in later genes. Defective lignin deposition is also associated with phenotypes of seed shattering or brittle culm. MYB and NAC transcriptional factors function as switches, and some homeobox proteins negatively control lignin biosynthesis genes. Ectopic deposition caused by overexpression of lignin biosynthesis genes or master switch genes induces curly leaf formation and dwarfism.

关键词： Development lignin rice

Intelligent Service Search Model Using Emerging Technologies

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Computers, Materials & Continua 2023年第10期77卷 1165-1181页

作者： Farhan Amin Gyu Sang choi Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea

In recent years,the Internet of Things(IoT)has played a vital role in providing various services to users in a smart ***,searching for services,objects,data,and frameworks remains a *** technological advancements in Cyber-Physical Systems(CPSs)and the Social Internet of Things(SIoT)open a new era of ***,we propose a Cyber-Physical-Social Systems(CPSs)for service ***,service search and object discovery operation carries with the suitable selection of friends in the *** proposed model constructs a graph and performs social network analysis(SNA).We suggest degree centrality,clustering,and scalefree emergence and show that a rational selection of friends per service exploration increases the overall network *** efficiency of our proposed system is verified using real-world datasets based on service processing time,path length,giant component,and network *** simulation results proved that our proposed system is efficient,robust,and scalable.

关键词： Internet of Things Social Internet of Things Cyber-Physical Social systems smart cities service search smart cities

Glycan targeting nanoparticle for photodynamic immunotherapy of melanoma

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Acta Pharmaceutica Sinica B 2023年第5期13卷 1903-1918页

作者： Yonghyun choi Wooic Son Youngpin Han Jayoung Chae Chul-Su Yang Jonghoon choi School of Integrative Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Molecular&Life Science Hanyang UniversityAnsan 15588Republic of Korea Center for Bionano Intelligence Education and Research Hanyang UniversityAnsan 15588Republic of Korea

Interaction between tumour cells and macrophages enables cancer cells to evade immune detection and clearance by interfering with macrophage *** anti-phagocytic signals regulated by anti-phagocytic proteins are termed"don't eat me"signals;these signals include sialic acidbinding immunoglobulin-type lectin-10(Siglec-10)and the recently revealed CD24 immune checkpoint(ICP).In this study,we demonstrate that targeting a specific glycan on CD24 exhibits the potential to inhibit *** nigra agglutinin(SNA),a sialic acid-binding lectin,was employed to block CD24 and to enhance phagocytosis in melanoma *** addition,we prepared SNA-conjugated hollow gold-iron oxide nanoparticles for photothermal therapy of *** findings show that the combination treatment of SNA-conjugated photothermal nanoparticles and near-infrared exposure successfully augments tumour cell phagocytosis both in vitro and in vivo models.

关键词： Immunotherapy Macrophages Phagocytosis Lectin Melanoma cancer Photothermal nanoparticles Immune checkpoint Glycan

Model for Generating Scale-Free Artificial Social Networks Using Small-World Networks

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Computers, Materials & Continua 2022年第12期73卷 6367-6391页

作者： Farhan Amin Gyu Sang choi Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea

The Internet of Things(IoT)has the potential to be applied to social networks due to innovative characteristics and sophisticated solutions that challenge traditional *** network analysis(SNA)is a good example that has recently gained a lot of scientific *** has its roots in social and economic research,as well as the evaluation of network science,such as graph *** in this area have subverted predefined theories,offering revolutionary ones regarding interconnected networks,and they have highlighted the mystery of six degrees of separation with confirmation of the small-world *** motivation of this study is to understand and capture the clustering properties of large networks and social *** present a network growth model in this paper and build a scale-free artificial social network with controllable clustering *** random walk technique is paired with a triangle generating scheme in our proposed *** a result,the clustering controlmechanism and preferential attachment(PA)have been *** research builds on the present random walk *** took numerous measurements for validation,including degree behavior and the measure of clustering decay in terms of node degree,among other ***,we conclude that our suggested random walk model is more efficient and accurate than previous state-of-the-art methods,and hence it could be a viable alternative for societal evolution.

关键词： Social networks small-world networks network generation models graph theory random walk network design social network analysis

Quantum-classical correspondence for the inverted oscillator

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Chinese Physics C 2017年第11期41卷 56-62页

作者： Mustapha Maamache Jeong Ryeol choi Laboratoire de Physique Quantique et Systèmes Dynamiques Faculté des SciencesUniversité Ferhat Abbas Sétif 1 Sétif 19000 Department of Radiologic Technology Daegu Health College

While quantum-classical correspondence for a system is a very fundamental problem in modern physics,the understanding of its mechanism is often elusive,so the methods used and the results of detailed theoretical analysis have been accompanied by active *** this study,the differences and similarities between quantum and classical behavior for an inverted oscillator have been analyzed based on the description of a complete generalized Airy function-type quantum wave *** inverted oscillator model plays an important role in several branches of cosmology and particle *** quantum wave packet of the system is composed of many sub-packets that are localized at different positions with regular intervals between *** is shown from illustrations of the probability density that,although the quantum trajectory of the wave propagation is somewhat different from the corresponding classical one,the difference becomes relatively small when the classical excitation is sufficiently *** have confirmed that a quantum wave packet moving along a positive or negative direction accelerates over time like a classical *** these main interpretations and others in the text,we conclude that our theory exquisitely illustrates quantum and classical correspondence for the system,which is a crucial concept in quantum mechanics.

关键词： quantum-classical correspondence inverted oscillator quantum wave packet

Development of Ubiquitous Simulation Service Structure Based on High Performance Computing Technologies

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Journal of Materials Science & Technology 2008年第3期24卷 374-378页

作者： Sang-Hyun CHO Jeong-Kil choi Center For e-Design KITECH7-47Songdo-DongYeonsu-Ku

The simulation field became essential in designing or developing new casting products and in improving manufacturing processes within limited time, because it can help us to simulate the nature of processing, so that developers can make ideal casting designs. To take the prior occupation at commercial simulation market, so many development groups in the world are doing their every effort. They already reported successful stories in manufacturing fields by developing and providing the high performance simulation technologies for multipurpose. But they all run at powerful desk-side computers by well-trained experts mainly, so that it is hard to diffuse the scientific designing concept to newcomers in casting field. To overcome upcoming problems in scientific casting designs, we utilized information technologies and full-matured hardware backbones to spread out the effective and scientific casting design mind, and they all were integrated into Simulation Portal on the web. It professes scientific casting design on the NET including ubiquitous access way represented by ＂Anyone, Anytime, Anywhere＂ concept for casting designs.

关键词： Parallel computation Message passing interface (MPI) Shared memory processing (SMP) Clustering Ubiquitous

Short-circuit Current Characteristics of Wind Generators

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电力系统自动化 2012年第8期36卷 110-114页

作者： Seung-Jae LEE Myeon-Song choi Department of Electrical Engineering Myongji University

To study the effects of wind generators on distribution system protection,the short-circuit current(SCC) characteristics of wind generators is *** there are many researches on the issue,a clear agreement has not been reached so *** SCC characteristics for different wind generators are *** simulation is performed in the same system integrated with different kinds of wind generators,and their results are compared with those reported in IEEE *** detection possibility by overcurrent relay(OCR)is discussed based on the simulation results.

关键词：风力发电机组短路电流电流特性配电系统 PSCAD 过流继电器 IEEE 通过检测