Results 81 to 90 of about 62,615 (286)

Decreased retinal nerve fiber layer thickness in patients with cerebral venous thrombosis

open access: yesBMC Ophthalmology, 2019
Background To identify thickness variations in the retinal nerve fiber layer around the optic disc and macula in patients with cerebral vein thrombosis (CVT) without papilledema.
Yaran Koban   +3 more
doaj   +1 more source

Quantification of Ophthalmic Changes After Long-Duration Spaceflight, and Subsequent Recovery [PDF]

open access: yes
A subset of crewmembers are subjected to ophthalmic structure changes due to long-duration spaceflight (>6 months). Crewmembers who experience these changes are described as having Spaceflight Associated Neuro-Ocular Syndrome (SANS).
Greenwald, S.   +9 more
core   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

open access: yesAdvanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han   +5 more
wiley   +1 more source

UBVR observation of V1357 Cyg = Cyg X-1. Search of the optical radiation of the accretion disk [PDF]

open access: yes
Data from 30 nights of V 1357 Cyg observations in July, August, and September of 1977 are presented. The contribution of the disk to the optic brightness of the system is computed with regard for the heating of its surface by ultraviolet radiation from V
Shevchenko, V. S.
core   +1 more source

Deteksi Penyakit Glaukoma pada Citra Fundus Retina Mata Menggunakan Adaptive Thresholding dan Support Vector Machine [PDF]

open access: yes, 2016
Glaukoma adalah penyebab kebutaan kedua terbanyak setelah katarak. Berbeda dengan katarak, kebutaan yang disebabkan oleh glaukoma bersifat permanen.
Amaliah, B. (Bilqis)   +2 more
core  

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

open access: yesAdvanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir   +5 more
wiley   +1 more source

Spectral domain optical coherence tomography imaging in optic disk pit associated with outer retinal dehiscence

open access: yesClinical Ophthalmology, 2014
Chee Wai Wong,1,2 Doric Wong,1,2 Ranjana Mathur1,2 1Singapore National Eye Centre, Singapore; 2Singapore Eye Research Institute, Singapore Abstract: A 37-year-old Bangladeshi male presented with an inferotemporal optic disk pit and serous macular ...
Wong CW, Wong D, Mathur R
doaj  

Ultra-high density recording technologies [PDF]

open access: yes
The Engineering Research Center in Data Storage Systems at Carnegie Mellon University in cooperation with the National Storage Industry Consortium has selected goals of achieving 10 Gbit/sq in.
Kryder, Mark H.
core   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

open access: yesAdvanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal   +4 more
wiley   +1 more source

Optic nerve head topography and retinal structural changes in eyes with macrodisks: a comparative study with spectral domain optical coherence tomography

open access: yesClinical Ophthalmology, 2016
Zeynep Kayaarasi Öztürker, Kadir Eltutar, Belma Karini, Sezin Özdogan Erkul, Özen Ayrancı Osmanbaşoğlu, Pınar Sultan Ophthalmology Department, Istanbul Research and Training Hospital, Istanbul, Turkey Purpose: To compare optic nerve
Ozturker ZK   +5 more
doaj  

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