Results 21 to 30 of about 4,143,466 (348)

Automated collection of single species of microfossils using a deep learning–micromanipulator system

open access: yesProgress in Earth and Planetary Science, 2020
For geochemical analysis such as stable isotope ratio, radiocarbon dating and minor element analysis for a single species of microfossils, a large number of specimens, is required. Collecting specimens one by one under a microscope requires enormous time
Takuya Itaki   +5 more
doaj   +1 more source

Motion processing deficits in migraine are related to contrast sensitivity [PDF]

open access: yes, 2012
Background: There are conflicting reports concerning the ability of people with migraine to detect and discriminate visual motion. Previous studies used different displays and none adequately assessed other parameters that could affect performance, such ...
Beaumont, H.M.   +2 more
core   +1 more source

Enhanced Information Flow From Cerebellum to Secondary Visual Cortices Leads to Better Surgery Outcome in Degenerative Cervical Myelopathy Patients: A Stochastic Dynamic Causal Modeling Study With Functional Magnetic Resonance Imaging

open access: yesFrontiers in Human Neuroscience, 2021
Degenerative cervical myelopathy (DCM) damages the spinal cord, resulting in long-term neurological impairment including motor and visual deficits. Given that visual feedback is crucial in guiding movements, the visual disorder may be a cause of motor ...
Rui Zhao   +9 more
doaj   +1 more source

THE VISUAL SYSTEM OF THE ALLIGATOR [PDF]

open access: yesThe Journal of General Physiology, 1957
The eye tissues and liver of the alligator contain vitamin A1 alone. The retina contains rhodopsin, typical in absorption spectrum (λmax 500 mµ); but synthesized in solution from neo-b retinene and opsin much more rapidly than are the frog, mammalian, or chicken rhodopsins previously examined. In this regard alligator rhodopsin resembles the rhodopsins
G, WALD, P K, BROWN, D, KENNEDY
openaire   +2 more sources

Ehlers-Danlos syndromes and their manifestations in the visual system

open access: yesFrontiers in Medicine, 2022
Ehlers-Danlos syndrome (EDS) is a rare, genetically variable, heterogenous group of (currently recognized) thirteen connective tissue disorders characterized by skin hyperextensibility, tissue fragility, and generalized joint hypermobility.
Samuel Asanad   +10 more
doaj   +1 more source

An automatic visual analysis system for tennis [PDF]

open access: yes, 2013
This article presents a novel video analysis system for coaching tennis players of all levels, which uses computer vision algorithms to automatically edit and index tennis videos into meaningful annotations.
Chin JP   +9 more
core   +1 more source

Glial insulin regulates cooperative or antagonistic Golden goal/Flamingo interactions during photoreceptor axon guidance

open access: yeseLife, 2021
Transmembrane protein Golden goal (Gogo) interacts with atypical cadherin Flamingo (Fmi) to direct R8 photoreceptor axons in the Drosophila visual system.
Hiroki Takechi   +7 more
doaj   +1 more source

Computing optical flow in the primate visual system [PDF]

open access: yes, 1989
Computing motion on the basis of the time-varying image intensity is a difficult problem for both artificial and biological vision systems. We show how gradient models, a well-known class of motion algorithms, can be implemented within the magnocellular ...
Koch, Christof   +2 more
core   +1 more source

Competition and selection during visual processing of natural scenes and objects [PDF]

open access: yes, 2003
When a visual scene, containing many discrete objects, is presented to our retinae, only a subset of these objects will be explicitly represented in visual awareness. The number of objects accessing short-term visual memory might be even smaller. Finally,
Koch, Christof, VanRullen, Rufin
core   +2 more sources

Tangential distribution of cell type and direction selectivity in monkey area MT [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2020
Abstract: We studied the multiunit responses to moving and static stimuli from 585 cell clusters in area MT using multi-electrode arrays. Our aim was to explore if MT columns exhibit any larger-scale tangential organization or clustering based on their ...
ANTONIA CINIRA M. DIOGO   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy