Results 1 to 10 of about 738 (174)

Amplitude, Latency, and Peak Velocity in Accommodation and Disaccommodation Dynamics. [PDF]

Biomed Res Int, 2017
The aim of this work was to ascertain whether there are differences in amplitude, latency, and peak velocity of accommodation and disaccommodation responses when different analysis strategies are used to compute them, such as fitting different functions to the responses or for smoothing them prior to computing the parameters.
Del Águila-Carrasco AJ, Esteve-Taboada JJ, Papadatou E, Ferrer-Blasco T, Montés-Micó R.   +4 more
europepmc   +8 more sources

Magnetic disaccommodation in single yttrium iron garnet crystal [PDF]

Applied Physics Letters, 1996
Measurements of magnetic disaccommodation in single yttrium iron garnet (YIG) crystals are presented. Two peaks of 0.2%–0.3% are observed in the isochronal spectrum around 130 and 250 K. Comparison of our results with those on polycrystalline YIG samples and with similar data on illuminated and gamma ray irradiated single YIG crystal samples is ...
L. Torres, M. Zazo, J. Iñiguez, C. de Francisco, J. M. Muñoz, P. Hernandez   +5 more
semanticscholar   +3 more sources

The Magnetic Disaccommodation in Titanium Doped Magnetite [PDF]

Le Journal de Physique IV, 1997
The domain wall stabilization processes in titanium doped magnetite is investigated by means of disaccommodation techniques. The time evolution of the initial magnetic susceptibility after sample demagnetization is measured in temperature range 80 to 500 K for polycrystalline specimens with nominal composition, Fe3-xTixO4 ...
Bendimya, K., de Francisco, C., Hernandez, P., Alejos, O., Muñoz, J.   +4 more
openaire   +4 more sources

Real-Time Control of a Focus Tunable Lens for Presbyopia Correction Using Ciliary Muscle Biopotentials and Artificial Neural Networks [PDF]

Bioengineering
Ageing results in the progressive loss of near vision, known as presbyopia, which impacts individuals and society. Existing corrective methods offer only partial compensation and do not restore dynamic focusing at varying distances.
Bishesh Sigdel, Sven Schumayer, Sebastian Kaltenstadler, Eberhart Zrenner, Volker Bucher, Albrecht Rothermel, Torsten Straßer   +6 more
doaj   +2 more sources

Validation of Novel Metrics from the Accommodative Dynamic Profile [PDF]

Vision, 2018
Objective and subjective methods of assessing time taken for accommodative change (ToAC) include accommodative dynamics (AD) and accommodative facility (AF).
Nicola Szostek, Hetal Buckhurst, Christine Purslow, Thomas Drew, Avril Collinson, Phillip Buckhurst   +5 more
doaj   +2 more sources

The effects of color and neutral density filters on dynamic accommodation in individuals with mild traumatic brain injury [PDF]

Frontiers in Neuroscience
IntroductionVisual symptoms related to accommodation are frequently reported after mild traumatic brain injury (mTBI), yet the effect of spectral and luminance-altering filters on dynamic accommodative performance remains unclear.
Nawaf M. Almutairi, John Hayes, Yu-Chi Tai, Khawlah Alfaifi, Mohammed M. Alnawmasi, Muteb K. Alanazi, Bandar M. Alenezi, Sulaiman Aldakhil, Chunming Liu   +8 more
doaj   +2 more sources

DISACCOMMODATION OF PERMEABILITY IN MANGANESE-ZINC-TITANIUM FERRITES [PDF]

Le Journal de Physique Colloques, 1971
The disaccommodation spectra of MnZnTi ferrites generally show only a single peak, at about — 30 °C, in the range — 50 to 120 °C. The amplitude of the peak is proportional to the number of localized ferrous ions, i. e. FeIITiIV pairs. The shift in the peak down from the usual 10 °C is due to a lowering of the activation energy from 0.85 to 0.7 eV, and ...
Knowles, J., Rankin, P.
openaire   +2 more sources

Study of the magnetic disaccommodation in La doped YIG [PDF]

physica status solidi (c), 2005
The relaxation of the initial magnetic permeability of La doped yttrium iron garnet (YIG) samples with nominal composition Y3-xLaxFe5O12 (0< x
Torres, C., Hernández-Gómez, P., Francisco, C. de, Arias, A. González, Muñoz, J. M., Alejos, O., Perdigão, J. M., Ferreira, A. R.   +7 more
openaire   +4 more sources

Disaccommodation of magnetic spectra of two manganese zinc ferrites

Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1965
Disaccommodation of the complex susceptibility (time change after demagnetization) of two manganese zinc ferrite materials of the composition Mn0.597Zn0.265Fe2.07O4 and Mn0.584 Zn0.353Fe2.05O4 was studied in response to demagnetizing frequency and rate, temperature, frequencies of ~20 kHz to ~2000 kHz, and rf magnetic field intensities of ~10-4 oersted
A L Rasmussen
openaire   +4 more sources

Disaccommodation in Sr-Doped YIG

Transactions of the Japan Institute of Metals, 1970
Keizo Hisatake, Keizo Ohta
  +6 more sources