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77,630 results on '"Kyeong A So"'

101. Mass Deformations of Brane Brick Models

Author

Franco, Sebastian, Ghim, Dongwook, Goulas, Georgios P., and Seong, Rak-Kyeong

Subjects
High Energy Physics - Theory, Mathematical Physics
Abstract

We investigate a class of mass deformations that connect pairs of 2d (0,2) gauge theories associated to different toric Calabi-Yau 4-folds. These deformations are generalizations to 2d of the well-known Klebanov-Witten deformation relating the 4d gauge theories for the C^2/Z_2 x C orbifold and the conifold. We investigate various aspects of these deformations, including their connection to brane brick models and the relation between the change in the geometry and the pattern of symmetry breaking triggered by the deformation. We also explore how the volume of the Sasaki-Einstein 7-manifold at the base of the Calabi-Yau 4-fold varies under deformation, which leads us to conjecture that it quantifies the number of degrees of freedom of the gauge theory and its dependence on the RG scale., Comment: 45 pages, 19 figures, 3 tables

Published
2023
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102. On the Master Space for Brane Brick Models

Author

Kho, Minsung and Seong, Rak-Kyeong

Subjects
High Energy Physics - Theory, Mathematical Physics, Mathematics - Algebraic Geometry
Abstract

We systematically study the master space of brane brick models that represent a large class of 2d (0,2) quiver gauge theories. These 2d (0,2) theories are worldvolume theories of D1-branes that probe singular toric Calabi-Yau 4-folds. The master space is the freely generated space of chiral fields subject to the J- and E-terms and the non-abelian part of the gauge symmetry. We investigate several properties of the master space for abelian brane brick models with U(1) gauge groups. For example, we calculate the Hilbert series, which allows us by using the plethystic programme to identify the generators and defining relations of the master space. By studying several explicit examples, we also show that the Hilbert series of the master space can be expressed in terms of characters of irreducible representations of the full global symmetry of the master space., Comment: 48 pages, 5 figures, 10 tables

Published
2023
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103. Synthesis and exceptional operational durability of polyaniline-inspired conductive ladder polymers

Author

Leng, Mingwan, Koripally, Nandu, Huang, Junjie, Vriza, Aikaterini, Lee, Kyeong Yeon, Ji, Xiaozhou, Li, Chenxuan, Hays, Megan, Tu, Qing, Dunbar, Kim, Xu, Jie, Ng, Tse Nga, and Fang, Lei

Subjects
Engineering, Macromolecular and Materials Chemistry, Materials Engineering, Chemical Sciences, Chemical Engineering, Macromolecular and materials chemistry, Chemical engineering, Materials engineering
Abstract

Ladder-type structures can impart exceptional stability to polymeric electronic materials. This article introduces a new class of conductive polymers featuring a fully ladder-type backbone. A judicious molecular design strategy enables the synthesis of a low-defect ladder polymer, which can be efficiently oxidized and acid-doped to achieve its conductive state. The structural elucidation of this polymer and the characterization of its open-shell nature are facilitated with the assistance of studies on small molecular models. An autonomous robotic system is used to optimize the conductivity of the polymer thin film, achieving over 7 mS cm-1. Impressively, this polymer demonstrates unparalleled stability in strong acid and under harsh UV-irradiation, significantly surpassing commercial benchmarks like PEDOT:PSS and polyaniline. Moreover, it displays superior durability across numerous redox cycles as the active material in an electrochromic device and as the pseudocapacitive material in a supercapacitor device. This work provides structural design guidance for durable conductive polymers for long-term device operation.

Published
2023

104. Synchrotron X-ray study of intrinsically disordered and polyampholytic Tau 4RS and 4RL under controlled ionic strength

Author

Cho, Hasaeam, Lee, Jimin, Nho, Hanjoon, Lee, Keunmin, Gim, Bopil, Lee, Juncheol, Lee, Jaehee, Ewert, Kai K, Li, Youli, Feinstein, Stuart C, Safinya, Cyrus R, Jin, Kyeong Sik, and Choi, Myung Chul

Subjects
Mathematical Sciences, Physical Sciences, Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD), Neurodegenerative, Alzheimer's Disease, Acquired Cognitive Impairment, Dementia, Aging, Brain Disorders, Humans, X-Rays, Synchrotrons, Intrinsically Disordered Proteins, Fluids & Plasmas, Mathematical sciences, Physical sciences
Abstract

Aggregated and hyperphosphorylated Tau is one of the pathological hallmarks of Alzheimer's disease. Tau is a polyampholytic and intrinsically disordered protein (IDP). In this paper, we present for the first time experimental results on the ionic strength dependence of the radius of gyration (Rg) of human Tau 4RS and 4RL isoforms. Synchrotron X-ray scattering revealed that 4RS Rg is regulated from 65.4 to 58.5 Å and 4RL Rg is regulated from 70.9 to 57.9 Å by varying ionic strength from 0.01 to 0.592 M. The Rg of 4RL Tau is larger than 4RS at lower ionic strength. This result provides an insight into the ion-responsive nature of intrinsically disordered and polyampholytic Tau, and can be implicated to the further study of Tau-Tau and Tau-tubulin intermolecular structure in ionic environments.

Published
2023

135. Prediction of TKI response in EGFR-mutant lung cancer patients-derived organoids using malignant pleural effusion

Author

Lee, Sang-Hyun, Kim, Kyuhwan, Lee, Eunyoung, Lee, Kyungmin, Ahn, Kyeong Hwan, Park, Hansom, Kim, Yelim, Shin, Soeun, Jeon, Sang Youl, Hwang, Yongki, Ahn, Dong Hyuck, Kwon, Yong-Jun, Moon, Seok Whan, Moon, Mi Hyoung, Kim, Kyung Soo, Hyun, Kwanyong, Kim, Tae-Jung, Sung, Yeoun Eun, Choi, Joon Young, Park, Chan Kwon, Kim, Sung Won, Yeo, Chang Dong, Sohn, Hyun-Jung, Hyun, You-Seok, Kim, Tai-Gyu, Ku, Bosung, Lim, Jeong Uk, and Kim, Seung Joon

Published
2024
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141. AZGP1 deficiency promotes angiogenesis in prostate cancer

Author

Wen, Ru M., Qiu, Zhengyuan, Marti, G. Edward W., Peterson, Eric E., Marques, Fernando Jose Garcia, Bermudez, Abel, Wei, Yi, Nolley, Rosalie, Lam, Nathan, Polasko, Alex LaPat, Chiu, Chun-Lung, Zhang, Dalin, Cho, Sanghee, Karageorgos, Grigorios Marios, McDonough, Elizabeth, Chadwick, Chrystal, Ginty, Fiona, Jung, Kyeong Joo, Machiraju, Raghu, Mallick, Parag, Crowley, Laura, Pollack, Jonathan R., Zhao, Hongjuan, Pitteri, Sharon J., and Brooks, James D.

Published
2024
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