Results 81 to 90 of about 482,948 (211)

Transverse coherence properties of X-ray beams in third-generation synchrotron radiation sources

, 2008
This article describes a complete theory of spatial coherence for undulator radiation sources. Current estimations of coherence properties often assume that undulator sources are quasi-homogeneous, like thermal sources, and rely on the application of the
Bahrdt, Bilderback, Chubar, Coı¨sson, Coïsson, Coïsson, Evgeni Saldin, Evgeni Schneidmiller, Geloni, Gianluca Geloni, Goodman, Howells, Kim, Kim, Mandel, Mandel, Mikhail Yurkov, O’Neill, Pfeiffer, Takayama, Wolf, Yabashi, Yabashi, Yabashi   +23 more
core   +1 more source

Acute hepatitis of unknown aetiology in children: evidence for and against causal relationships with SARS-CoV-2, HAdv and AAV2

BMJ Paediatrics Open
Background The cause of acute paediatric hepatitis of unknown aetiology (2022) has not been established despite extensive investigation.Objective To summarise the evidence for and against a causal role for human adenovirus (HAdv), adeno-associated virus ...
Xin Chen, Abrar Ahmad Chughtai, Chandini Raina MacIntyre, Trisha Greenhalgh, Hisham Ziauddeen, Deepti Gurdasani, Julie McEniery, Aye Moa, Mallory Trent, Emmanuel Mnatzaganian, Stuart Turville, Mohana Priya Kunasekaran   +11 more
doaj   +1 more source

Macular Pigment Optical Density in Chinese Primary Open Angle Glaucoma Using the One-Wavelength Reflectometry Method

Journal of Ophthalmology, 2016
Purpose. To investigate macular pigment optical density (MPOD) and its relationship with retinal thickness in primary open angle glaucoma (POAG) patients using the one-wavelength reflectometry method. Methods. A total of 30 eyes from 30 POAG patients (18
Yuying Ji, Chengguo Zuo, Mingkai Lin, Xiongze Zhang, Miaoling Li, Lan Mi, Bing Liu, Feng Wen   +7 more
doaj   +1 more source

Task-Irrelevant Perceptual Learning Specific to the Contrast Polarity of Motion Stimuli [PDF]

, 2009
Studies of perceptual learning have focused on aspects of learning that are related to early stages of sensory processing. However, conclusions that perceptual learning results in low-level sensory plasticity are of great controversy, largely because ...
Grossberg, Stephen, Pilly, Praveen K., Seitz, Aaron R.   +2 more
core   +1 more source

Representational shifts from feedforward to feedback rhythms index phenomenological integration in naturalistic vision

Communications Biology
How does the brain integrate complex and dynamic visual inputs into phenomenologically seamless percepts? Previous results demonstrate that when visual inputs are organized coherently across space and time, they are more strongly encoded in feedback ...
Lixiang Chen, Radoslaw Martin Cichy, Daniel Kaiser   +2 more
doaj   +1 more source

How visual confidence on global motion is affected by local motion ambiguity and type of motion noise, and its correlation with autistic trait tendency?

, 2019
Perceptual confidence has been found to correlate with task performance in general, and is believed to be independent of stimulus features. However, certain stimulus feature could induce a subjective sense of uncertainty, which could potentially ...
LAM, Man Wai, Angela
core  

Discovering Functional Communities in Dynamical Networks [PDF]

, 2006
Many networks are important because they are substrates for dynamical systems, and their pattern of functional connectivity can itself be dynamic -- they can functionally reorganize, even if their underlying anatomical structure remains fixed.
Camperi, Marcelo F., Klinkner, Kristina Lisa, Shalizi, Cosma Rohilla   +2 more
core   +2 more sources

Clinical application of optical coherence tomography in combination with functional diagnostics: advantages and limitations for diagnosis and assessment of therapy outcome in central serous chorioretinopathy

Clinical Ophthalmology, 2014
Joshua A Schliesser, Gary Gallimore, Nancy Kunjukunju, Nelson R Sabates, Peter Koulen, Felix N Sabates Vision Research Center, Department of Ophthalmology, University of Missouri – Kansas City, School of Medicine, Kansas City, MO, USA Purpose ...
Schliesser JA, Gallimore G, Kunjukunju N, Sabates NR, Koulen P, Sabates FN   +5 more
doaj  

Diffraction based Hanbury Brown and Twiss interferometry performed at a hard x-ray free-electron laser

, 2017
We demonstrate experimentally Hanbury Brown and Twiss (HBT) interferometry at a hard X-ray Free Electron Laser (XFEL) on a sample diffraction patterns.
Chollet, M., Dzhigaev, D., Feng, Y., Gorobtsov, O. Yu., Kurta, R. P., Lazarev, S., Meijer, J. -M., Mukharamova, N., Petukhov, A. V., Serkez, S., Sikorski, M., Singer, A., Song, S., Vartanyants, I. A., Williams, G., Zhu, D.   +15 more
core  

Spider Community Detection: Seeded Geodesic Expansion with Modularity-Guided Refinement and Greedy Merge Matching

Computers
Community detection plays a central role in understanding the modular structure of complex networks. This work introduces Spider Community Detection, a hybrid local–global algorithm that constructs communities through a depth-bounded geodesic expansion ...
Hovhannes A. Harutyunyan, Parsa Kamalipour   +1 more
doaj   +1 more source