Results 81 to 90 of about 52,858 (287)

The Structure of High Strehl Ratio Point-Spread Functions

, 2003
We describe the symmetries present in the point-spread function (PSF) of an optical system either located in space or corrected by an adaptive o to Strehl ratios of about 70% and higher.
Anand Sivaramakrishnan, Ben R. Oppenheimer, James R. Graham, Labeyrie A., Macintosh B., Marshall D. Perrin, Russell B. Makidon, Watson S. M.   +7 more
core   +1 more source

PolSAR Image Speckle Reduction Based on Classification of Similarity Features Between Coherency Matrices

IEEE Access, 2019
A novel PolSAR image speckle reduction algorithm based on a new definition of similarity coefficient is proposed in this paper. Pixels in image are firstly classified into three types by threshold segmentation which is calculated with the similarity ...
Ping Han, Fei Dong, Kun Jia, Binbin Han
doaj   +1 more source

Upper Limit for Angular Compounding Speckle Reduction [PDF]

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII, 2017
AbstractPrevious studies of angular compounding for speckle reduction in optical coherence tomography may not have fully accounted for optical aberrations, which produce unintended spatial averaging and concomitant loss of spatial resolution. We accounted for such aberrations by aligning our system and measuring distortions in the images, and found ...
Winetraub, Yonatan, Wu, Chris, Chu, Steven, de la Zerda, Adam   +3 more
openaire   +1 more source

PHASES High Precision Differential Astrometry of delta Equulei

, 2005
delta Equulei is among the most well-studied nearby binary star systems. Results of its observation have been applied to a wide range of fundamental studies of binary systems and stellar astrophysics.
Aristidi E., Balega I., Balega I. I., Balega I. I., Balega I. I., Balega Y. Y., Benjamin F. Lane, Bernard F. Burke, Boehm C., Bonneau D., Bonneau D., Castelli F., Couteau P., Couteau P., Couteau P., Danjon A., Docobo J. A., Duquennoy A., Finsen W. S., Finsen W. S., Finsen W. S., Finsen W. S., Finsen W. S., Finsen W. S., Finsen W. S., Habets G. M. H. J., Heintz W. D., Holden F., Ismailov R. M., Isobe S., Jeffers H. M., M. M. Colavita, M. Shao, Maciej Konacki, Matthew W. Muterspaugh, Miura N., Morgan B. L., Morgan B. L., Muller P., Muller P., Rabl G., S. R. Kulkarni, Smalley B., Soderhjelm S., Starikova G. A., Struve O., Tokovinin A. A., Tokovinin A. A., Tokovinin A. A., Tokovinin A. A., van den Bos W. H., van Leeuwen F., Wilson R. H., Wilson R. H., Wilson R. H.   +54 more
core   +1 more source

Whole‐Body Pattern of Muscle Degeneration and Progression in Sarcoglycanopathies

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To characterize whole‐body intramuscular fat distribution pattern in patients with sarcoglycanopathies and explore correlations with disease severity, duration and age at onset. Methods Retrospective, cross‐sectional, multicentric study enrolling patients with variants in one of the four sarcoglycan genes who underwent whole‐body ...
Laura Costa‐Comellas, Mauro Monforte, Angel Sanchez‐Montañez, Penélope Romero‐Duque, Elena Pegoraro, Jordi Díaz‐Manera, Dmitry Vlodavets, Lorenzo Maggi, Marco Moscatelli, Adele D‘Amico, Montse Olivé, Jorge Alonso‐Pérez, Giacomo Comi, José Miguel Escudero‐Fernández, Gabriela S. Urcuyo, Anna Pichiecchio, Angela Berardinelli, Kristl G. Claeys, Claudio Bruno, Chiara Panicucci, Sara Bortolani, Eleonora Torchia, Enzo Ricci, Soledad Monges, Jorge A. Bevilacqua, Jorge Diaz‐Jara, Maggie C. Walter, Simone Thiele, Nicoline Løkken, John Vissing, Susana Quijano‐Roy, Robert Y. Carlier, Nicol C. Voermans, Chiara Marini‐Bettolo, Michela Guglieri, Volker Straub, Lea Leonardis, Francina Munell, David Gómez‐Andrés, Giorgio Tasca   +39 more
wiley   +1 more source

Particle sizing in rocket motor studies utilizing hologram image processing [PDF]

, 1987
A technique of obtaining particle size information from holograms of combustion products is described. The holograms are obtained with a pulsed ruby laser through windows in a combustion chamber.
Netzer, David, Powers, John
core   +1 more source

Development of a Prediction Model for Progression Risk in High‐Grade Gliomas Based on Habitat Radiomics and Pathomics

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To investigate the value of constructing models based on habitat radiomics and pathomics for predicting the risk of progression in high‐grade gliomas. Methods This study conducted a retrospective analysis of preoperative magnetic resonance (MR) images and pathological sections from 72 patients diagnosed with high‐grade gliomas (52 ...
Yuchen Zhu, Yuxi Gong, Weilin Xu, Xingjian Sun, Gefei Jiang, Lei Qiu, Kexin Shi, Mengxing Wu, Yinjiao Fei, Jinling Yuan, Jinyan Luo, Yurong Li, Yuandong Cao, Minhong Pan, Shu Zhou   +14 more
wiley   +1 more source

Epilepsy‐Associated Variants of a Single SCN1A Codon Exhibit Divergent Functional Properties

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Pathogenic variants in SCN1A, which encodes the voltage‐gated sodium channel NaV1.1, are associated with multiple epilepsy syndromes exhibiting a range of clinical severity. SCN1A variants are reported in different syndromes, including Dravet syndrome, which is associated with loss‐of‐function, whereas neonatal/infantile‐onset ...
Lanie N. Liebovitz, Christopher H. Thompson, Linda C. Laux, Alfred L. George Jr.   +3 more
wiley   +1 more source

How much laser power can propagate through fusion plasma?

, 2005
Propagation of intense laser beams is crucial for inertial confinement fusion, which requires precise beam control to achieve the compression and heating necessary to ignite the fusion reaction.
Boyd R W, Harvey A Rose, Kline J, Kruer W L, Maximov A V, Maximov A V, Meezan N B, Miller G H, Niemann C, Pavel M Lushnikov, Sulem C, Talanov V I, Vedenov A A, Vedenov A A, Zakharov V E, Zakharov V E   +15 more
core   +1 more source

A Depolarizing Leak in Sodium Bicarbonate Cotransporter NBCe1 Causes Brain Edema

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives SLC4A4 encodes electrogenic sodium bicarbonate cotransporter NBCe1, prominently expressed in kidney and brain. Recessive loss‐of‐function variants in SLC4A4 cause proximal renal tubular acidosis, no brain edema. In the brain, NBCe1 is expressed by astrocytes, where it regulates pH and mediates astrocyte volume changes.
Quinty Bisseling, Mark D. Parker, Sven Kerst, Richard A. Pasternack, Jacob Tondreau, Marjolein Breur, Gemma M. van Rooijen‐van Leeuwen, Davide Tonduti, Ettore Salsano, Alejandra Darling, Joanna A. E. van Wijk, Susanna Törnroth‐Horsefield, Marianna Bugiani, Petra J. W. Pouwels, Quinten Waisfisz, Marjo S. van der Knaap, Rogier Min   +16 more
wiley   +1 more source