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Optical Coherence Tomography Angiography findings in Syphilitic Outer Retinitis.
Retin Cases Brief Rep
December 2024
Department of Ophthalmology, Hospital de Clínicas, University of Buenos Aires, Buenos Aires, Argentina.
Purpose: to report optical coherence tomography angiography findings in syphilitic outer retinopathy, a singular clinical manifestation of ocular syphilis.
Methods: case report.
Results: Multimodal imaging including optical coherence tomography angiography was performed in a patient presenting syphilitic outer retinopathy.
Outflows from Naked Singularities, Infall through the Black Hole Horizon: Hydrodynamic Simulations of Accretion in the Reissner-Nordström Space-Time.
Phys Rev Lett
December 2024
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland.
We performed the first simulations of accretion onto the compact objects in the Reissner-Nordström (RN) space-time. The results obtained in general relativity are representative of those for spherically symmetric naked singularities and black holes in a number of modified gravity theories. A possible application of these calculations is to the active galactic nuclei with their powerful jets and outflows.
View Article and Find Full Text PDFEntanglement microscopy and tomography in many-body systems.
Nat Commun
January 2025
Department of Physics and HK Institute of Quantum Science & Technology, The University of Hong Kong, Hong Kong, Hong Kong.
Quantum entanglement uncovers the essential principles of quantum matter, yet determining its structure in realistic many-body systems poses significant challenges. Here, we employ a protocol, dubbed entanglement microscopy, to reveal the multipartite entanglement encoded in the full reduced density matrix of the microscopic subregion in spin and fermionic many-body systems. We exemplify our method by studying the phase diagram near quantum critical points (QCP) in 2 spatial dimensions: the transverse field Ising model and a Gross-Neveu-Yukawa transition of Dirac fermions.
View Article and Find Full Text PDFImplications of cosmologically coupled black holes for pulsar timing arrays.
Sci Rep
December 2024
Department of Physics, University of Trento, Via Sommarive 14, 38123, Povo (TN), Italy.
It has been argued that realistic models of (singularity-free) black holes (BHs) embedded within an expanding Universe are coupled to the large-scale cosmological dynamics, with striking consequences, including pure cosmological growth of BH masses. In this pilot study, we examine the consequences of this growth for the stochastic gravitational wave background (SGWB) produced by inspiraling supermassive cosmologically coupled BHs. We show that the predicted SGWB amplitude is enhanced relative to the standard uncoupled case, while maintaining the [Formula: see text] frequency scaling of the spectral energy density.
View Article and Find Full Text PDFSalivary oxytocin and amygdalar alterations in functional neurological disorders.
Brain Commun
December 2024
Faculty of Science and Medicine, University of Fribourg, Fribourg 1700, Switzerland.
Individuals diagnosed with functional neurological disorder experience abnormal movement, gait, sensory processing or functional seizures, for which research into the pathophysiology identified psychosocial contributing factors as well as promising biomarkers. Recent pilot studies suggested that (epi-)genetic variants may act as vulnerability factors, for example, on the oxytocin pathway. This study set out to explore endogenous oxytocin hormone levels in saliva in a cohort of 59 functional neurological disorder patients and 65 healthy controls comparable in sex and age.
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