The Challenges Found in the Access to Digital Information by People with Visual Impairment

2017 ◽  
pp. 330-346
Author(s):  
Karolina Vieira da Silva Bastos ◽  
Ivette Kafure Muñoz
Keyword(s):  
Visual Impairment ◽  
Digital Information

On-line image readout in CTEM

1994 ◽  
Vol 52 ◽  
pp. 400-401
Author(s):  
K.-H. Herrmann ◽  
W. D. Rau ◽  
R. Sikeler
Keyword(s):  
Primary Electron ◽  
Digital Information ◽  
Electron Hole ◽  
Detection Technology ◽  
Long Time ◽  
On Line ◽  
Electron Image ◽  
Optical Transfer ◽  
Detection Quantum Efficiency ◽  
Technical Solutions

Quantitative recording of electron patterns and their rapid conversion into digital information is an outstanding goal which the photoplate fails to solve satisfactorily. For a long time, LLL-TV cameras have been used for EM adjustment but due to their inferior pixel number they were never a real alternative to the photoplate. This situation has changed with the availability of scientific grade slow-scan charged coupled devices (CCD) with pixel numbers exceeding 106, photometric accuracy and, by Peltier cooling, both excellent storage and noise figures previously inaccessible in image detection technology. Again the electron image is converted into a photon image fed to the CCD by some light optical transfer link. Subsequently, some technical solutions are discussed using the detection quantum efficiency (DQE), resolution, pixel number and exposure range as figures of merit.A key quantity is the number of electron-hole pairs released in the CCD sensor by a single primary electron (PE) which can be estimated from the energy deposit ΔE in the scintillator,

Bilateral Spheno-orbital Meningiomas with Proptosis and Visual Impairment: Surgical Management

Skull Base ◽  
2009 ◽  
Vol 19 (01) ◽  
Author(s):  
Makoto Nakamura ◽  
Götz Lütjens ◽  
Joachim Krauss
Keyword(s):  
Visual Impairment ◽  
Surgical Management

Mild visual impairment in a 13-year-old child with osteoporosis-pseudoglioma syndrome

2013 ◽  
Author(s):  
Cheung Moira ◽  
Brain Caroline ◽  
Allgrove Jeremy
Keyword(s):  
Visual Impairment

Visual impairment in patients with pituitary apoplexy

2020 ◽  
Author(s):  
Imen Gargouri ◽  
Hadjkacem Faten ◽  
Belabed Wafa ◽  
Dhouha Ben Salah ◽  
Mnif Mouna ◽  
...  
Keyword(s):  
Visual Impairment ◽  
Pituitary Apoplexy
Sign in / Sign up

Export Citation Format

Share Document