Results 21 to 30 of about 74,677 (191)
First-trimester ductus venosus Doppler velocimetry for estimation of risk of Down syndrome [PDF]
, 2002 OBJECTIVE: To test the hypothesis that the application of ductus venosus Doppler velocimetry between 10--14 weeks gestation may serve as a screening tool for the detection of fetuses with Down syndrome and estimate a new criteria of risk.
Moron, Antonio Fernandes +2 more
core +4 more sources
Band structure of a IV-VI black phosphorus analogue, the thermoelectric SnSe [PDF]
Phys. Rev. Lett. 120, 156403 (2018), 2017 The success of black phosphorus in fast electronic and photonic devices is hindered by its rapid degradation in presence of oxygen. Orthorhombic tin selenide is a representative of group IV-VI binary compounds that are robust, isoelectronic, and share the same structure with black phosphorus.
arxiv +1 more source
Erbium-Implanted Materials for Quantum Communication Applications [PDF]
, 2021 Erbium-doped materials can serve as spin-photon interfaces with optical transitions in the telecom C-band, making them an exciting class of materials for long-distance quantum communication. However, the spin and optical coherence times of Er3+ ions are limited by currently available host materials, motivating the development of new Er3+-containing ...
arxiv +1 more source
Visualizing data augmentation in deep speaker recognition [PDF]
arXiv, 2023 Visualization is of great value in understanding the internal mechanisms of neural networks. Previous work found that LayerCAM is a reliable visualization tool for deep speaker models. In this paper, we use LayerCAM to analyze the widely-adopted data augmentation (DA) approach, to understand how it leads to model robustness.
arxiv
Role of matrix elements in the time-resolved photoemission signal [PDF]
New J. Phys. 22 023031 (2020), 2018 Time- and angle-resolved photoemission spectroscopy accesses the ultrafast evolution of quasiparticles and many-body interactions in solid-state systems. However, the momentum- and energy-resolved transient photoemission intensity may not be unambiguously related to the intrinsic relaxation dynamics of photoexcited electrons. In fact, interpretation of
arxiv +1 more source
DA-TransUNet: Integrating Spatial and Channel Dual Attention with Transformer U-Net for Medical Image Segmentation [PDF]
, 2023 Accurate medical image segmentation is critical for disease quantification and treatment evaluation. While traditional Unet architectures and their transformer-integrated variants excel in automated segmentation tasks. However, they lack the ability to harness the intrinsic position and channel features of image.
arxiv +1 more source
Arquivos Brasileiros de Cardiologia, 2006 Um paciente portador de marcapasso definitivo bi-atrial-ventricular por fibrilação atrial paroxística e bradicardia sinusal, em uso crônico de anticoagulante oral, apresentou sinais clínicos da síndrome da veia cava superior.
Roberto Costa +4 more
doaj +1 more source
Tratamento endovascular da Sindrome de Quebra-nozes (Nutcracker)
Jornal Vascular Brasileiro, 2013 A Síndrome do Quebra-nozes se refere a um conjunto de sinais secundários à compressão da veia renal esquerda, mais comumente entre a artéria mesentérica superior e a aorta, levando ao comprometimento do fluxo para a veia cava.
Jorge Ribeiro da Cunha Junior +4 more
doaj +1 more source
Arquivos Brasileiros de Cardiologia, 2007 As obstruções do sistema venoso superior podem ocorrer por trombose espontânea ou na presença de cateteres de hemodiálise ou quimioterapia, e mesmo na presença de compressão extrínseca por tumores intratorácicos.
Rogério Tadeu Tumelero +3 more
doaj +1 more source
Raman study of magnetic excitations and magneto-elastic coupling in alpha-SrCr2O4 [PDF]
, 2014 Using Raman spectroscopy, we investigate the lattice phonons, magnetic excitations, and magneto-elastic coupling in the distorted triangular-lattice Heisenberg antiferromagnet alpha-SrCr2O4, which develops helical magnetic order below 43 K. Temperature dependent phonon spectra are compared to predictions from density functional theory calculations ...
arxiv +1 more source