Results 21 to 30 of about 29,360 (257)

Beam squint and Stokes V with off-axis feeds

open access: yes, 2008
Radio telescopes with off-axis feeds, such as the (E)VLA, suffer from "beam squint" in which the two orthogonal circular polarizations sampled have different pointing centers on the sky.
Cotton, W. D., Uson, Juan M.
core   +1 more source

Spectral domain optical coherence tomography morphology in optic disc pit associated maculopathy

open access: yesIndian Journal of Ophthalmology, 2014
Purpose: Our purpose was to study the clinical manifestation and course of optic pit maculopathy using Spectral Domain Optical Coherence Tomography (SD- OCT) images.
Janusz Michalewski   +2 more
doaj   +1 more source

Complications of frontal defects [PDF]

open access: yes, 1987
A case where the severe course of an orbital phlegmon led to a functionally and cosmetically poor condition is presented. Thirty-five years later, it was possible to achieve a satisfactory result through several operations performed with ...
Berghaus, Alexander, Schmidt, B.
core   +1 more source

Outcomes of chronic macular hole surgical repair

open access: yesIndian Journal of Ophthalmology, 2014
Purpose: To report visual and anatomic outcomes of chronic macular hole surgery, with analysis of pre-operative OCT-based hole size and post-operative closure type. Settings and Design: An IRB-approved, retrospective case series of 26 eyes of 24 patients
Shripaad Y Shukla   +3 more
doaj   +1 more source

Primary Beam and Dish Surface Characterization at the Allen Telescope Array by Radio Holography

open access: yes, 2011
The Allen Telescope Array (ATA) is a cm-wave interferometer in California, comprising 42 antenna elements with 6-m diameter dishes. We characterize the antenna optical accuracy using two-antenna interferometry and radio holography. The distortion of each
Ackermann, R. F.   +48 more
core   +1 more source

Brown syndrome with severe amblyopia: a case report from Africa

open access: yesThe Pan African Medical Journal, 2015
Brown syndrome is a rare form of strabismus that is characterised by restriction of elevation of the eye in adduction. This is a case report of an eleven year old Nigerian girl who presented with a history of squint and poor vision.
Bolutife Ayokunnu Olusanya
doaj   +1 more source

Personal A-constant in relation to axial length with various intraocular lenses

open access: yesIndian Journal of Ophthalmology, 2014
Purpose: To study the relationship between the axial length and personal A-constant for the 1-piece Tecnis (Abbott ZCB00), AcrySof MA60AC (Alcon) and the Quatrix aspheric preloaded (CROMA) intraocular lenses (IOL).
Mohamed A Eldaly, Khaled A Mansour
doaj   +1 more source

Age‐Related Characteristics of SYT1‐Associated Neurodevelopmental Disorder

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives We describe the clinical manifestations and developmental abilities of individuals with SYT1‐associated neurodevelopmental disorder (Baker‐Gordon syndrome) from infancy to adulthood. We further describe the neuroradiological and electrophysiological characteristics of the condition at different ages, and explore the associations ...
Sam G. Norwitz   +3 more
wiley   +1 more source

Congenital cataracts presenting as a childhood squint

open access: yesBritish and Irish Orthoptic Journal, 2012
Aim:  A timely reminder that a small posterior subcapsular cataract could present with a squint. Methods:  A case series is reported of 4 patients who were referred to the paediatric ophthalmology service for management of a squint.
Shanel Sharma   +2 more
doaj   +1 more source

An enhanced beamspace channel estimation algorithm for wideband millimeter-wave massive MIMO systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2022
Accurate beamspace channel estimation is critical in wideband millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) communication systems.
Yang Liu   +5 more
doaj   +1 more source

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