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Transition from the topological to the chaotic in the nonlinear Su-Schrieffer-Heeger model.
Nat Commun
January 2025
Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
Recent studies on topological materials are expanding into the nonlinear regime, while the central principle, namely the bulk-edge correspondence, is yet to be elucidated in the strongly nonlinear regime. Here, we reveal that nonlinear topological edge modes can exhibit the transition to spatial chaos by increasing nonlinearity, which can be a universal mechanism of the breakdown of the bulk-edge correspondence. Specifically, we unveil the underlying dynamical system describing the spatial distribution of zero modes and show the emergence of chaos.
View Article and Find Full Text PDFDevelopment of the fish invitrome for animal-free environmental risk assessment of chemicals.
Environ Toxicol Chem
January 2025
Department of Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
Given the need to reduce animal testing for environmental risk assessment, we aim to develop a fish invitrome, an alternative fish modular framework capable of predicting chemical toxicity in fish without the use of animals. The central module of the framework is the validated RTgill-W1 cell line assay that predicts fish acute toxicity of chemicals (Organization for Economic Cooperation and Development Test Guideline (OECD TG) 249). Expanding towards prediction of chronic toxicity, the fish invitrome includes two other well-advanced modules for chemical bioaccumulation/biotransformation and inhibition of fish growth.
View Article and Find Full Text PDFTraveler's diarrhea is a common and, in most cases, self-limiting illness among long-distance travelers. Pathogen diagnostics are indicated for severe or dysenteric courses as well as for increased risk of severe courses. A central component of pathogen diagnostics is stool culture.
View Article and Find Full Text PDFmorphoHeart: A quantitative tool for integrated 3D morphometric analyses of heart and ECM during embryonic development.
PLoS Biol
January 2025
School of Biosciences and Bateson Centre, University of Sheffield, Western Bank, Sheffield, United Kingdom.
Heart development involves the complex structural remodelling of a linear heart tube into an asymmetrically looped and ballooned organ. Previous studies have associated regional expansion of extracellular matrix (ECM) space with tissue morphogenesis during development. We have developed morphoHeart, a 3D tissue segmentation and morphometry software with a user-friendly graphical interface (GUI) that delivers the first integrated 3D visualisation and multiparametric analysis of both heart and ECM morphology in live embryos.
View Article and Find Full Text PDFDeveloping an Intervention to Enhance Aging in Place for Older Veterans Living in Permanent Supportive Housing.
Gerontologist
January 2025
Center for Health Equity Research and Promotion, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, USA.
Background And Objectives: The Housing and Urban Development-Veterans Affairs Supported Housing (HUD-VASH) program provides rental subsidies, case management, and supportive services to Veterans who are currently or formerly homeless, 77% of whom are ages ≥50. Few interventions have been developed to address the needs of older Veterans in HUD-VASH.
Research Design And Methods: We conducted a 2-stage study to inform the development of an intervention to promote aging in place in HUD-VASH.
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