Results 71 to 80 of about 3,616,800 (230)

Diffractive and refractive timescales at 4.8 GHz in PSR B0329+54

open access: yes, 2011
We present the results of flux density monitoring of PSR B0329+54 at the frequency of 4.8 GHz using the 32-meter TCfA radiotelescope. The observations were conducted between 2002 and 2005.
Bhat   +27 more
core   +1 more source

Reversion scheme for droplet parameters with rainbow refractometry based on Debye theory [PDF]

open access: yes, 2011
This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
3rd Micro and Nano Flows Conference (MNF2011)   +4 more
core  

Rapid estimation of concentration of aromatic classes in middistillate fuels by high-performance liquid chromatography [PDF]

open access: yes
An high performance liquid chromatography (HPLC) method to estimate four aromatic classes in middistillate fuels is presented. Average refractive indices are used in a correlation to obtain the concentrations of each of the aromatic classes from HPLC ...
Otterson, D. A., Seng, G. T.
core   +1 more source

The use of terrestrial laser scanning for measurements in shallow-water : correction of the 3D coordinates of the point cloud [PDF]

open access: yes, 2015
Although acoustic measurements are a wide-spread technique in the field of bathymetry, most systems require a water depth of at least 2 m. Furthermore, mapping shallow-water depths with acoustic techniques is expensive and complicated.
De Wulf, Alain   +4 more
core   +1 more source

Prevalence of Refractive Errors in Students with and without Color Vision Deficiency

open access: yesJournal of Ophthalmic & Vision Research, 2014
Purpose: To evaluate refractive errors in school age children with color vision deficiency (CVD) and those with normal color vision (NCV) in order to make a better understanding of the emmetropization process.
H. Ostadimoghaddam   +7 more
semanticscholar   +1 more source

Refractive Errors Among Medical Students

open access: yesNepalese Medical Journal, 2018
Introduction: Refractive errors are becoming a problem in many societies, with prevalence rates of myopia in many Asian urban countries reaching epidemic proportions.
Poojyashree Karki   +3 more
doaj   +1 more source

PT-symmetry with a system of three-level atoms

open access: yes, 2012
We show that a vapor of multilevel atoms driven by far-off resonant laser beams, with possibility of interference of two Raman resonances, is highly efficient for creating parity-time (PT) symmetric profiles of the probe-field refractive index, whose ...
Hang, Chao   +2 more
core   +1 more source

Effect of Computer Tasks in Straight Gaze on Corneal Topographic Indices

open access: yesJournal of Ophthalmic & Vision Research
Purpose: To investigate the effect of the near visual task of movie-watching in the straight gaze position on corneal topographic parameters. Methods: Thirty myopic young adults with an average age of 25.10 ± 4.13 years were recruited for the study.
Zeinab Tanhaye Shamsabady   +2 more
doaj   +1 more source

Prevalence and Risk Factors for Refractive Errors: Korean National Health and Nutrition Examination Survey 2008-2011

open access: yesPLoS ONE, 2013
Purpose To examine the prevalence and risk factors of refractive errors in a representative Korean population aged 20 years old or older. Methods A total of 23,392 people aged 20+ years were selected for the Korean National Health and Nutrition Survey ...
E. Kim   +4 more
semanticscholar   +1 more source

Retinal neurovascular assessment and choroidal vascularity index in patients with keratoconus

open access: yesScientific Reports
This study aims to evaluate the macular and the optic nerve head thickness and vascular profiles in KC patients and compare them with two groups of healthy emmetrope and subjects with myopic-astigmatism. This cross-sectional study was conducted at Khatam-
Javad Sadeghi   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy