Results 71 to 80 of about 12,722 (205)
Numerical Simulations of Collisional Cascades at the Roche Limits of White Dwarf Stars
, 2017 We consider the long-term collisional and dynamical evolution of solid material orbiting in a narrow annulus near the Roche limit of a white dwarf. With orbital velocities of 300 km/sec, systems of solids with initial eccentricity $e \gtrsim 10^{-3 ...
Bromley, Benjamin C., Kenyon, Scott J.
core +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Neuromyelitis Optica Spectrum Disorder (NMOSD) is a chronic autoimmune neuroinflammatory disease, typically characterized by antibodies against aquaporin 4 (AQP4‐IgG) or myelin oligodendrocyte glycoprotein (MOG‐IgG). Simultaneous seropositivity for both antibodies in a single patient is exceedingly rare.
Yeting Luo, Shuhua Xie, Xianghong Liu
wiley +1 more source
Plasma patches inside the polar cap and auroral oval: the impact on the spaceborne GPS receiver
Journal of Space Weather and Space Climate, 2019 In this study, we focus on plasma patches with very dense plasma in the southern hemisphere during the main phase of 2015 St. Patrick’s Day storm. With in situ electron densities exceeding 1.5 × 1012 m−3 at 450–500 km altitude, the patches cause strong ...
Xiong Chao +4 more
doaj +1 more source
Distributed Downlink Precoding and Equalization in Satellite Swarms
, 2022 In this paper, we propose a novel approach for downlink transmission from a satellite swarm towards a ground station (GS). These swarms have the benefit of much higher spatial separation in the transmit antennas than traditional satellites with antenna arrays, promising a massive increase in spectral efficiency.
Röper, Maik +4 more
openaire +2 more sources
Survey of Inter-satellite Communication for Small Satellite Systems: Physical Layer to Network Layer View [PDF]
, 2016 Small satellite systems enable whole new class of missions for navigation, communications, remote sensing and scientific research for both civilian and military purposes.
Afghah, Fatemeh +5 more
core +3 more sources
Fluid Biomarkers of Disease Burden and Cognitive Dysfunction in Progressive Supranuclear Palsy
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Identifying objective biomarkers for progressive supranuclear palsy (PSP) is crucial to improving diagnosis and establishing clinical trial and treatment endpoints. This study evaluated fluid biomarkers in PSP versus controls and their associations with regional 18F‐PI‐2620 tau‐PET, clinical, and cognitive outcomes.
Roxane Dilcher +10 more
wiley +1 more source
Geomagnetism : review 2009 [PDF]
, 2010 The Geomagnetism team measures, records, models and interprets variations in the Earth’s natural magnetic fields, across the world and over time. Our data and expertise help to develop scientific understanding of the evolution of the solid Earth and its ...
Thomson, Alan W.P.
core
A Gas-poor Planetesimal Capture Model for the Formation of Giant Planet Satellite Systems
, 2005 Assuming that an unknown mechanism (e.g., gas turbulence) removes most of the subnebula gas disk in a timescale shorter than that for satellite formation, we develop a model for the formation of regular (and possibly at least some of the irregular ...
Alibert +70 more
core +3 more sources
Micro-to-macro: astrodynamics at extremes of lengths-scale [PDF]
, 2011 This paper investigates astrodynamics at extremes of length-scale, ranging from swarms of future `smart dust' devices to the capture and utilisation of small near Earth asteroids.
Bewick, R. +6 more
core +2 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Cognitive decline is a disabling and variable feature of Parkinson disease (PD). While cholinergic system degeneration is linked to cognitive impairments in PD, most prior research reported cross‐sectional associations. We aimed to fill this gap by investigating whether baseline regional cerebral vesicular acetylcholine transporter ...
Taylor Brown +6 more
wiley +1 more source