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Articles by Bei Yan
Photonic arbitrary Chern vectors
Abstract INTRODUCTION RESULTS DISCUSSION MATERIALS AND METHODS Acknowledgments Supplementary Materials REFERENCES Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract The hallmark feature of three-dimensional (3D) Chern insulators is the topological Chern vector, C = (C1, C2, C3), which extends the celebrated Chern-type bulk-edge correspondence from 2D to 3D systems.
Gauge-field-induced duality group in metamaterials
Abstract Dualities are mappings that connect seemingly unrelated physical systems, enabling simplification and reinterpretation via duality transformations. However, prior studies have been predominantly limited to one-to-one mappings isomorphic to a \({{\mathbb{Z}}}_{2}\) group, where self-duality occurs only at a single point at which the lattice maps onto itself under a duality transformation.
Rapid and ultrasensitive detection of telomerase activity in clinical samples using a PCR-free enzymatic assay
Abstract Telomerase, a critical biomarker for cancer diagnosis, necessitates the development of convenient, efficient, and highly sensitive detection methods. Distinct from conventional nucleic acid amplification techniques such as PCR, LAMP, or RCA, this method achieves signal amplification through Endo IV-mediated enzymatic turnover.
Publisher Correction: Realization of a Dirac-vortex topological photonic crystal fiber - Nature Communications
Correction to: Nature Communications https://doi.org/10.1038/s41467-025-65222-z, published online 11 December 2025 In this article, the author list was incorrectly structured. The author list has been reordered and now appears as, Quanhao Niu; Bei Yan; Lei Shen; Hao Lin; Xi Zhang; Zhenyu Wan; Mutian Xu; Hui Zhang; Jie Luo; Lei Zhang; Perry Ping Shum; Zhen Gao and Jian Wang. The original article has been corrected.
Topological Dirac-vortex modes in a three-dimensional photonic topological insulator - Nature Communications
Abstract Recently, topological Dirac-vortex modes in Kekulé-distorted photonic lattices have attracted broad interest and exhibited promising applications in robust photonic devices such as topological cavities, lasers, and fibers.
RAB17 promotes endometrial cancer progression by inhibiting TFRC-dependent ferroptosis - Cell Death & Disease
Abstract Studies have indicated that RAB17 expression levels are associated with tumor malignancy, and RAB17 is more highly expressed in endometrial cancer (EC) tissues than in peritumoral tissues. However, the roles and potential mechanisms of RAB17 in EC remain undefined. The present study confirmed that the expression of RAB17 facilitates EC progression by suppressing cellular ferroptosis-like alterations.
Multifrequency and Multimode Topological Waveguides in a Stampfli‐Triangle Photonic Crystal with Large Valley Chern Numbers (Laser Photonics Rev. 18(6)/2024)
Graphical Abstract Multifrequency and Multimode Topological Transmission The multifrequency and multimode topological waveguide, utilizing Stampfli-triangle photonic crystals engineered with large valley Chern numbers, is theoretically and experimentally observed by Bei Yan, Yiwei Peng, Jianjun Liu, Fei Gao, Shuangchun Wen, and their co-workers (see article number 2300686). There are two topological edge states (TESs) in low-frequency bands and four TESs in high-frequency bands.
Analysis of Ozone Pollution Characteristics, Meteorological Effects, and Transport Sources in Zhuzhou, China
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Enhancing APE-1 detection through apurinic/apyrimidinic site inhibition of DNA polymerase: an innovative, highly sensitive approach
Enhancing APE-1 detection through apurinic/apyrimidinic site inhibition of DNA polymerase: an innovative, highly sensitive approach This study presents an innovative method for the highly sensitive detection of apurinic/apyrimidinic endonuclease 1 (APE1), a crucial biomarker and target for cancer diagnosis and treatment. This method predicated on our discovery regarding tant the work of Taq DNA polymerase can be blocked by the apurinic or apyrimidinic site (AP site).
Multifrequency and Multimode Topological Waveguides in a Stampfli‐Triangle Photonic Crystal with Large Valley Chern Numbers
Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description lpor202300686-sup-0001-SuppMat.pdf1.2 MB Supporting Information References 1, , , , , , , , , , , Rev. Mod. Phys. 2019, 91, 015006. 2, , , , , , , Adv. Phys. X 2021, 6, 1905546. 3, , , , , , , Nat. Rev. Phys. 2021, 3, 520. 4, , , , , , , , , , , , , , , , , , , , , , , J. Phys. Photonics 2022, 4, 032501. 5, , , , Phys. Rev. Lett. 2008, 100, 013905. 6, , , , , , , , , , , , Nature 2020, 578, 246.
Gaussian clustering and quantification of the sperm chromatin dispersion test using convolutional neural networks
Gaussian clustering and quantification of the sperm chromatin dispersion test using convolutional neural networks† Sperm DNA fragmentation is a sign of sperm nuclear damage. The sperm chromatin dispersion (SCD) test is a reliable and economical method for the evaluation of DNA fragmentation. However, the cut-off value for differentiation of DNA fragmented sperms is fixed at 1/3 with limited statistical justification, making the SCD test a semi-quantitative method that gives user-dependent results.
Gaussian clustering and quantification of sperm chromatin dispersion test using convolutional neural network
Gaussian clustering and quantification of sperm chromatin dispersion test using convolutional neural network Sperm DNA fragmentation is a sign of sperm nuclear damage. Sperm chromatin dispersion test (SCD) is a reliable and economic method for the evaluation of DNA fragmentation. However, the cut-off value for differentiation of DNA fragmented sperms is fixed at 1/3 with limited statistical justification, making SCD a semi-quantitative method that gives user-dependent results.
Topological antichiral surface states in a magnetic Weyl photonic crystal - Nature Communications
Abstract Chiral edge states that propagate oppositely at two parallel strip edges are a hallmark feature of Chern insulators which were first proposed in the celebrated two-dimensional (2D) Haldane model. Subsequently, counterintuitive antichiral edge states that propagate in the same direction at two parallel strip edges were discovered in a 2D modified Haldane model.
Multiband topological states in the Penrose-triangle photonic crystals
Abstract The topological edge state (TES) and topological corner state (TCS) in photonic crystals (PCs) provide effective ways to manipulate the propagation of light. To improve the performance and integration of topological photonic devices, the realization of multiband topological states by PCs combined with quasi-periodic structure needs to be urgently explored.
Cardiac glycoside-mediated turnover of Na, K-ATPases as a rational approach to reducing cell surface levels of the cellular prion protein
Influence of oleandrin on PrPC levels in differentiated ReN VM cells depends on ATP1A1 engagement Several scenarios could be invoked regarding the mechanism of action through which CGs impact PrPC homeostasis in a manner that might promote its endo/lysosomal degradation, including the possibility that cholesterol-like features of molecules in this compound class can disrupt the cholesterol-rich raft membrane domains that PrPC resides in [49].
Higher-order topological states in two-dimensional Stampfli-Triangle photonic crystals
Abstract In this Letter, the higher-order topological state (HOTS) and its mechanism in two-dimensional Stampfli-Triangle (2D S-T) photonic crystals (PhCs) is explored. The topological corner states (TCSs) in 2D S-T PhCs are based on two physical mechanisms: one is caused by the photonic quantum spin Hall effect (PQSHE), and the other is caused by the topological interface state.
Pseudo-spin-valley coupled topological states protected by different symmetries in photonic crystals
Abstract The quantum spin Hall effect protected by C6 symmetry [realized in the domain wall (DW) formed by a trivial-photonic crystal (TPC) and a nontrivial-PC (NPC)] and the quantum valley Hall effect protected by C3 symmetry [realized in the DW formed by two valley PCs (VPCs)] have been widely researched due to their excellent topological properties.
Modified clays reduce leaching of per‐ and polyfluoroalkyl substances from AFFF‐contaminated soils
1 INTRODUCTION Per- and polyfluoroalkyl substances (PFAS) have been widely detected in environmental compartments, wildlife, and humans (Zhi & Liu, 2018). PFAS are chemically persistent (Houtz et al., 2013), some species are found bioaccumulative (Giesy & Kannan, 2001; Haug et al., 2010), and therefore this family of man-made chemicals poses considerable risks to humans and wildlife (Sunderland et al., 2019).
Fragile topology in double-site honeycomb lattice photonic crystal
Abstract Fragile topology (FT) opens a new direction in topological photonics, but a new type of photonic crystal (PC) with FT remains to be proposed. In this Letter, the double-site honeycomb lattice (DSHL) PC is proposed by rotating the double dielectric rods (DDR) six times, forming unit cell, and then arraying the unit cells in a triangular lattice. Quantum spin Hall effect occurs by manipulating the DDR in the tangential and radial directions of the unit cell.
Coupled cavity-waveguide based on topological corner state and edge state
Abstract The topological corner state (TCS) and topological edge state (TES) have created new approaches to manipulate the propagation of light. The construction of a topological coupled cavity-waveguide (TCCW) based on the TCS and TES is worth looking forward to, due to its research prospects in realizing high-performance micro-nano integrated photonic devices.
Sorption of Polyfluoroalkyl Surfactants on Surface Soils: Effect of Molecular Structures, Soil Properties, and Solution Chemistry
Zwitterionic, cationic, and anionic per- and polyfluoroalkyl substances (PFASs) are identified in aqueous film-forming foam (AFFF) concentrates and AFFF-impacted sites. However, the mobility potential of zwitterionic and cationic PFASs is poorly understood, preventing reliable site assessment. The study aimed to elucidate the mobility behaviors of PFASs of various charge states in saturated soil–water systems and assess critical influencing factors.
Determinants of Quality of Life for Breast Cancer Patients in Shanghai, China
To evaluate the association of social support status, health insurance and clinical factors with the quality of life of Chinese women with breast cancer. Information on demographics, clinical characteristics, and social support status was collected from 1,160 women with newly diagnosed breast cancer in Shanghai, China. The Perceived Social Support Scale was used to assess different sources of social support for breast cancer patients.
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