Article
Mathematics
Tali Kaufman, Ori Parzanchevski
Summary: This paper investigates the power operation problem of high-dimensional expander graphs, and defines a new power operation method that uses geodesic walks on quotients of Bruhat-Tits buildings. Applying this operation can obtain expander graphs of higher degrees, and the combinatorial study of flags of free modules over finite local rings proves their excellent expansion properties in the power complex.
INTERNATIONAL MATHEMATICS RESEARCH NOTICES
(2022)
Article
Physics, Multidisciplinary
Timoteo Carletti, Lorenzo Giambagli, Ginestra Bianconi
Summary: The investigation of collective phenomena of topological signals defined on higher-order networks is in its infancy. This study combines topology and nonlinear dynamics to determine the conditions for global synchronization of topological signals defined on simplicial or cell complexes.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Urko Reinosa
Summary: This paper discusses how two subgraphs of a given Feynman graph can overlap with each other, using the notion of connecting and returning lines. Nonoverlap theorems for one-particleirreducible subgraphs with different numbers of external legs are derived, along with a justification of the skeleton expansion for vertex functions in scalar field theories with more than five legs. The extension of the skeleton expansion to other classes of graphs is also discussed.
Article
Multidisciplinary Sciences
Liping Ye, Chunyin Qiu, Meng Xiao, Tianzi Li, Juan Du, Manzhu Ke, Zhengyou Liu
Summary: Dislocations in solid-state materials have a significant impact on wave propagation due to their topological properties. However, the experimental evidence supporting this observation has been lacking. In this study, the researchers used a 3D acoustic weak topological insulator with controllable dislocations to provide direct experimental evidence for the existence of one-dimensional topological dislocation modes.
NATURE COMMUNICATIONS
(2022)
Article
Immunology
Anastasiia L. L. Sycheva, Ekaterina A. A. Komech, Mikhail V. V. Pogorelyy, Anastasia A. A. Minervina, Shamil Z. Z. Urazbakhtin, Maria A. A. Salnikova, Mikhail F. F. Vorovitch, Eugene P. P. Kopantzev, Ivan V. V. Zvyagin, Alexander Y. Y. Komkov, Ilgar Z. Z. Mamedov, Yuri B. B. Lebedev
Summary: The development and implementation of vaccines have been a major success in healthcare over the last century, with studies showing that tick-borne encephalitis (TBE) vaccine can lead to a robust T cell response, generating a variety of immunological memory clones.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Chemistry, Physical
Yan Gao, Chengyong Zhong, Shengyuan A. Yang, Kai Liu, Zhong-Yi Lu
Summary: In this study, a series of three-dimensional graphene networks with versatile electronic properties, including semiconductor and topological nodal-ring carbon phases, were designed through first-principles calculations. These newly discovered carbon phases show high potential for applications in optoelectronics, photovoltaics, and quantum topological materials, among others.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Engineering, Environmental
Wenbo Cheng, Biao Wan, Jianlei Shen, Hu Tang, Shishuai Xue, Gongkai Wang, Enke Liu, Huiyang Gou
Summary: This study explores the performance of topological semimetal Co3Sn2S2 with a quasi two-dimensional structure as a candidate anode for sodium ion storage. Carbon nano onions (CNOs) were introduced to further improve its performance. It was found that Co3Sn2S2-CNOs exhibited higher rate capacity and cycle life, and the stability of Co3Sn2S2's host structure was maintained by CNOs, allowing efficient diffusion of sodium ions in its quasi-2D structure. The synergistic effect of electrons and ions, as well as increased active sites across the interface, boosted the rate performance of Co3Sn2S2-CNOs. The study proposed a multi-step conversion and alloying reaction mechanism. Additionally, sodium ion capacitors (SICs) based on Co3Sn2S2-CNOs anode showed high energy density, power density, and capacity retention after cycles.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Alexander Palatnik, Markas Sudzius, Stefan Meister, Karl Leo
Summary: The study demonstrates a planar binary structure with interface state in the visible spectral region, incorporating an active organic material for gain under optical excitation. The transition from fluorescence to lasing is observed under sufficiently strong pump energy density.
Article
Multidisciplinary Sciences
Yuan Zhang, Bin Chen, Daqin Guan, Meigui Xu, Ran Ran, Meng Ni, Wei Zhou, Ryan O'Hayre, Zongping Shao
Summary: This study demonstrates an approach to achieving full thermo-mechanical compatibility between the cathode and other cell components for solid oxide fuel cells. By introducing a thermal-expansion offset and using reactive sintering to form a composite electrode, the research shows high activity and excellent stability of the electrode. The introduction of reactive negative-thermal-expansion components may provide a general strategy for developing fully compatible and highly active electrodes for SOFCs.
Article
Computer Science, Artificial Intelligence
Wenbin Pei, Bing Xue, Lin Shang, Mengjie Zhang
Summary: Due to the imbalance in class distribution, classifiers often exhibit biased performance towards the majority class and perform poorly on the minority class. This study proposes a new cost-sensitive genetic programming method that utilizes rough set theory to detect overlapping areas and improve classification performance on unbalanced high-dimensional data.
IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION
(2023)
Article
Optics
Yong Zhang, Jian Shen, Jingchi Li, Hongwei Wang, Chenglong Feng, Lei Zhang, Lu Sun, Jian Xu, Ming Liu, Ying Wang, Yonghui Tian, Jianwen Dong, Yikai Su
Summary: This article reports on the miniaturization of electro-optic modulators using ultracompact topological modulators. By implementing a topological interface state in a one-dimensional lattice on a thin-film lithium-niobate integrated platform, a topological cavity with a size of 1.6 x 140 square micrometers and a large modulation bandwidth of 104 GHz is achieved. To the best of our knowledge, this is the most compact topological modulator with a reported bandwidth above 28 GHz.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Zhenyi Wang, Yanjie Zhong, Zhaofeng Ye, Lang Zeng, Yang Chen, Minglei Shi, Zhiyuan Yuan, Qiming Zhou, Minping Qian, Michael Q. Zhang
Summary: MarkovHC is a novel Markov hierarchical clustering algorithm that effectively stratifies cells, identifies cell populations, and characterizes cellular trajectories and critical points. Its application in investigating the multi-level architectures and transition processes during human embryo preimplantation development and gastric cancer procession demonstrates its effectiveness in single-cell omics studies.
NUCLEIC ACIDS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Jingyi Tian, Qi Ying Tan, Yutao Wang, Yihao Yang, Guanghui Yuan, Giorgio Adamo, Cesare Soci
Summary: The authors demonstrate a lithography-free, vertical-emitting, single-mode laser emitting in the green by using a few monolayers of perovskite quantum dots. This topological laser overcomes the limitations of low directionality and complex design requirements.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Sang Wook Park, Zhe Zhang, Haoyuan Qi, Baokun Liang, Javeed Mahmood, Hyuk-Jun Noh, Mike Hambsch, Mingchao Wang, Mao Wang, Khoa Hoang Ly, Zhiyong Wang, Inez M. Weidinger, Shengqiang Zhou, Jong-Beom Baek, Ute Kaiser, Stefan C. B. Mannsfeld, Xinliang Feng, Renhao Dong
Summary: A new method for the controlled synthesis of two-dimensional conjugated metal-organic framework (2D c-MOF) films with high crystallinity and defined layer orientation has been developed. The achieved films exhibit in-plane orientation, polycrystalline structure, and show superior performance, such as fast response humidity sensing.
ACS MATERIALS LETTERS
(2022)
Article
Computer Science, Artificial Intelligence
Yanhao Yang, Pan Shi, Yuyi Wang, Kun He
Summary: Community detection is a crucial task in network analysis. This study introduces QOCE, an overlapping community detection method that does not require prior knowledge. The method expands seed sets and uses quadratic optimization to determine community boundaries, with competitive performance shown in evaluations on synthetic and real-world networks.
KNOWLEDGE-BASED SYSTEMS
(2022)