Results 51 to 60 of about 3,218,047 (195)

Quantum Stochastic Absorption [PDF]

open access: yes, 1999
We report a detailed and systematic study of wave propagation through a stochastic absorbing random medium. Stochastic absorption is modeled by introducing an attenuation constant per unit length $\alpha$ in the free propagation region of the one ...
Jayannavar, A. M.   +2 more
core   +1 more source

Damped Lyman-alpha Absorption Associated with an Early-Type Galaxy at Redshift z = 0.16377

open access: yes, 1997
We report new HST and ground-based observations of a damped Lyman-alpha absorption system toward the QSO 0850+4400. The redshift of the absorption system is z = 0.163770 and the neutral hydrogen column density of the absorption system is log N = 19.81 cm*
Altan, Hakan   +10 more
core   +1 more source

Absorption capacity, kinetics and mechanical behaviour in dry and wet states of hydrophobic DEDMS/TEOS-based silica aerogels [PDF]

open access: yes, 2017
This work is a new approach to the study of the structural, mechanical and absorption properties of hybrid organic/inorganic silica-based aerogels. Diethoxydimethylsilane and tetraethoxysilane have been used as precursors.
Braza, Verónica   +5 more
core   +1 more source

White mold detection in common beans through leaf reflectance spectroscopy [PDF]

open access: yesEngenharia Agrícola, 2015
This study aimed to identify wavelengths based on leaf reflectance (400-1050 nm) to estimate white mold severity in common beans at different seasons. Two experiments were carried out, one during fall and another in winter.
Marley L. Machado   +4 more
doaj   +1 more source

Synopsis of Mid-latitude Radio Wave Absorption in Europe [PDF]

open access: yes, 1984
Radio wave absorption data covering almost two years from Europe to Central Asia are presented. They are normalized by relating them to a reference absorption. Every day these normalized data are fitted to a mathematical function of geographical location
Friedrich, M., Torkar, K. M.
core   +1 more source

AN INVESTIGATION OF THE POROUS SILICON OPTICAL-ABSORPTION POWER-LAW NEAR THE BAND-EDGE [PDF]

open access: yes, 2002
A theoretical investigation of the absorption coefficient of p-type doped porous silicon near the band edge is presented. We assume that the absorption coefficient is constructed by taking an average over a distribution (in terms of band gap) of ...
CHOY, TC, DERLET, PM, STONEHAM, AM
core   +1 more source

Individual use of self-medication and other remedies in COVID-19 outpatients in Western-Pomerania

open access: yesScientific Reports
We analyzed data from positively tested COVID-19 outpatients to describe self-medication with OTC drugs and use of other remedies against symptoms of SARS-CoV-2 infection.
Svea Stüdemann   +4 more
doaj   +1 more source

Two-photon absorption in potassium niobate

open access: yes, 2001
We report measurements of thermal self-locking of a Fabry-Perot cavity containing a potassium niobate (KNbO3) crystal. We develop a method to determine linear and nonlinear optical absorption coefficients in intracavity crystals by detailed analysis of ...
A. D. Ludlow   +13 more
core   +1 more source

Self‐Healing Hydrogels: The Next Paradigm Shift in Tissue Engineering?

open access: yesAdvanced Science, 2019
Given their durability and long‐term stability, self‐healable hydrogels have, in the past few years, emerged as promising replacements for the many brittle hydrogels currently being used in preclinical or clinical trials. To this end, the incompatibility
Sepehr Talebian   +10 more
doaj   +1 more source

The disappearance of a narrow Mg II absorption system in quasar SDSS J165501.31+260517.4

open access: yes, 2013
In this letter, we present for the first time, the discovery of the disappearance of a narrow Mg II $\lambda\lambda2796,2803$ absorption system from the spectra of quasar SDSS J165501.31+260517.4 ($z_{\rm e}=1.8671$).
Chen, Zhi-Fu, Gu, Min-Feng, Qin, Yi-Ping
core   +1 more source

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