Results 91 to 100 of about 12,684 (325)

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

A New Statistical Analysis of the Morphology of Spiral Galaxies

The Astronomical Journal
Morphology is the starting point for understanding galaxies. Elmegreen et al. classified spiral galaxies into flocculent, multiple-arm, and grand-design galaxies based on the regularity of their spiral arm structure.
Junye Wei, Ye Xu, Zehao Lin, Chaojie Hao, Yingjie Li, Dejian Liu, Shuaibo Bian   +6 more
doaj   +1 more source

From gas to stars along the spiral wave: CO, HCN, and star formation variations across the spiral arms in NGC 4321 and M51

Astronomy & Astrophysics
Context. Molecular clouds form stars from the interstellar medium via gravitational collapse, following a sequence from low-density gas to high-density cores and eventually the formation of stars. In classical density wave theory, gas clouds orbiting the
Greve Minou, Neumann Lukas, Thorp Mallory, Colombo Dario, Bigiel Frank, Querejeta Miguel, Meidt Sharon E., Barnes Ashley T., Bazzi Zein, Klessen Ralf S., Leroy Adam K., Pan Hsi-An, Pety Jérôme, Ruiz-García Marina, Schinnerer Eva, Smith Rowan, Stuber Sophia, Sun Jiayi, Usero Antonio, Williams Thomas G.   +19 more
doaj   +1 more source

Stiffness estimation of planar spiral spring based on Gaussian process regression

Scientific Reports, 2022
Planar spiral spring is important for the dimensional miniaturisation of motor-based elastic actuators. However, when the stiffness calculation of the spring arm is based on simple beam bending theory, the results possess substantial errors compared with
Jingjing Liu, Noor Azuan Abu Osman, Mouaz Al Kouzbary, Hamza Al Kouzbary, Nasrul Anuar Abd Razak, Hanie Nadia Shasmin, Nooranida Arifin   +6 more
doaj   +1 more source

Circumbinary, not transitional: on the spiral arms, cavity, shadows, fast radial flows, streamers, and horseshoe in the HD 142527 disc [PDF]

, 2018
We present 3D hydrodynamical models of the HD 142527 protoplanetary disc, a bright and well-studied disc that shows spirals and shadows in scattered light around a 100 au gas cavity, a large horseshoe dust structure in mm continuum emission, together ...
Daniel J. Price, N. Cuello, C. Pinte, D. Mentiplay, S. Casassus, V. Christiaens, G. Kennedy, J. Cuadra, M. SebastianPerez, S. Marino, P. Armitage, A. Zurlo, A. Juhász, E. Ragusa, G. Laibe, G. Lodato   +15 more
semanticscholar   +1 more source

Validation of the Pediatric Arthritis Ultrasound Scoring System for the Elbow, Wrist, and Finger Joints in Children With Juvenile Idiopathic Arthritis

Arthritis Care &Research, EarlyView.
Objective We aimed to validate the Pediatric Arthritis Ultrasound Scoring System (PAUSS) for upper extremity joints in children with juvenile idiopathic arthritis (JIA). Methods Children with JIA were evaluated for elbow, wrist, or finger arthritis by clinical examination (CE) and musculoskeletal ultrasound (MSUS) with images scored according to the ...
Patricia Vega‐Fernandez, Pinar Ozge Avar‐Aydin, Kelly Rogers, Daniel J. Lovell, Jennifer Huggins, Alexei Grom, Hermine I. Brunner, Grant S. Schulert, Sheila T. Angeles‐Han, Mekibib Altaye, Amy Cassedy, Arthur B. Meyers, Tracy V. Ting   +12 more
wiley   +1 more source

A Multiwavelength Investigation of Spiral Structures in z > 1 Galaxies with JWST

The Astrophysical Journal Letters
Recent JWST observations have revealed the prevalence of spiral structures at z > 1. Unlike in the local Universe, the origin and the consequence of spirals at this epoch remain unexplored. We use public JWST/NIRCam data from the COSMOS-Web survey to map
Boris S. Kalita, Si-Yue Yu, John D. Silverman, Emanuele Daddi, Luis C. Ho, Andreas L. Faisst, Miroslava Dessauges-Zavadsky, Annagrazia Puglisi, Simon Birrer, Daichi Kashino, Xuheng Ding, Jeyhan S. Kartaltepe, Zhaoxuan Liu, Darshan Kakkad, Francesco Valentino, Olivier Ilbert, Georgios Magdis, Arianna S. Long, Shuowen Jin, Anton M. Koekemoer, Richard Massey   +20 more
doaj   +1 more source

Invariant manifolds in barred galaxy simulations

Astronomy & Astrophysics
Context. The origin and nature of spiral arms in barred galaxies are still under debate. Among others, the theory of invariant manifolds provides a framework capable of explaining spiral and ringed structures in these systems. Aims.
Soler-Terricabras T., Romero-Gómez M., Roca-Fàbrega S.   +2 more
doaj   +1 more source

Magnetic spiral arms in galaxy haloes [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
We seek the conditions for a {\it steady} mean field galactic dynamo. The parameter set is reduced to those appearing in the $α^2$ and $α/ω$ dynamo, namely velocity amplitudes, and the ratio of sub-scale helicity to diffusivity. The parameters can be allowed to vary on conical spirals.
openaire   +2 more sources

The Orbit of the Companion to HD 100453A: Binary-driven Spiral Arms in a Protoplanetary Disk [PDF]

, 2018
HD 100453AB is a 10 ± 2 Myr old binary whose protoplanetary disk was recently revealed to host a global two-armed spiral structure. Given the relatively small projected separation of the binary (1.″05, or ∼108 au), gravitational perturbations by the ...
K. Wagner, R. Dong, P. Sheehan, D. Apai, M. Kasper, M. McClure, K. Morzinski, L. Close, J. Males, P. Hinz, S. Quanz, J. Fung   +11 more
semanticscholar   +1 more source