Results 111 to 120 of about 449,448 (310)

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

open access: yesAdvanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang   +9 more
wiley   +1 more source

Case report: Reversible splenial lesion syndrome preceding the onset of multiple sclerosis

open access: yesFrontiers in Immunology
BackgroundThe reversible splenial lesion syndrome is frequently associated with systemic and central nervous system infections. Whether an infection associated with the occurrence of the reversible splenial lesion syndrome could play a role in the later ...
Matthias Mauritz   +11 more
doaj   +1 more source

Cerebral Hemodynamic Changes in Older Adults With Cognitive Complaints According to the Presence of Peripheral Artery Disease

open access: yesAGING MEDICINE, EarlyView.
Among 132 older adults, 13 had peripheral artery disease (PAD), identified using the ankle–brachial index. Over approximately 13 months, PAD was associated with increasing middle cerebral artery mean flow velocity, with a significant difference in left‐sided velocity change between groups.
SangMi Noh, Hae‐Eun Shin, YongSoo Shim
wiley   +1 more source

Chromatische Fantasie J. S. Bach mit 2tem Clavier von Adolf Doppler

open access: yes
von Adolf Doppler. - Autograph - [s.l.], [s.d.]. - [7] Bl.von Adolf Doppler. - Autograph - [s.l.], [s.d.].

core  

Triature Doppler Velocimeter [PDF]

open access: yes, 2008
Author Institution: Los Alamos National LaboratoryAuthor Institution: National Security Technologies, LLCSlides presented at the 3nd Annual Photonic Doppler Velocimetry (PDV) Conference and Workshop held at Sandia National Laboratories, Albuquerque, New ...
Rutkowski, Araceli   +14 more
core  

Doppler-free Fourier transform spectroscopy

open access: yes, 2017
The feasibility of sub-Doppler broadband multi-heterodyne spectroscopy with two laser frequency combs is demonstrated with two-photon excitation spectra of the 5S-5D transitions of rubidium ...
Theodor W. Hänsch (3962285)   +4 more
core   +1 more source

A stress‐balance‐based critical Weber number for droplets and bubbles

open access: yesAIChE Journal, EarlyView.
Abstract Predicting droplet and bubble breakup in turbulent flows is critical for optimizing multiphase flow processes such as emulsification and atomization. Traditional models based on a fixed critical Weber number (Wec$$ {We}_c $$) may not capture interfacial‐stress dominance in low‐viscosity fluids or viscous resistance in high‐viscosity droplets ...
Supratim S. Dipta   +4 more
wiley   +1 more source

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