Results 11 to 20 of about 255,260 (330)

Gain induced stability of active plane-parallel resonators [PDF]

open access: yes, 1974
It has been observed for a plane-parallel resonator with a saturated medium that under certain conditions confined beams mainly concentrated near the axis are present. The experiments have been done with a sealed-off plane-parallel CO2 laser of one meter
Ernst, G.J., Witteman, W.J.
core   +14 more sources

Signature of a three-dimensional photonic band gap observed on silicon inverse woodpile photonic crystals [PDF]

open access: yes, 2011
We have studied the reflectivity of CMOS-compatible three-dimensional silicon inverse woodpile photonic crystals at near-infrared frequencies. Polarization-resolved reflectivity spectra were obtained from two orthogonal crystal surfaces corresponding to ...
Huisman, Simon R.   +5 more
core   +3 more sources

Vers quelle évaluation de la réflexivité en contexte de formation initiale des enseignants ?

open access: yesQuestions Vives, 2009
In the French Belgium Community, secondary teacher education is based on 13 skills presented in a decree defining teacher education. Among these 13 skills, one of them focuses on the primary importance of developing student teachers’ reflectivity during ...
Antoine Derobertmasure, Arnaud Dehon
doaj   +1 more source

Characterization, Production and Microwave Absorbing Properties of Polyaniline-NiFe2O4: Tb Composites

open access: yesMedžiagotyra, 2019
In this study, terbium-doped NiFe2O4 was produced by using mixed oxide technique. The Ni1-xTbxFe2O4 composition was synthesized and x was selected as 0.025, 0.050 and 0.070, respectively.
Ethem İlhan ŞAHIN   +2 more
doaj   +1 more source

Cross-Evaluation of Reflectivity from NEXRAD and Global Precipitation Mission during Extreme Weather Events

open access: yesSensors, 2022
During extreme events such as tropical cyclones, the precision of sensors used to sample the meteorological data is vital to feed weather and climate models for storm path forecasting, quantitative precipitation estimation, and other atmospheric ...
Melisa Acosta-Coll   +3 more
doaj   +1 more source

Results of the Basin and Range Geoscientific Experiment (BARGE): A marine-style seismic reflection survey across the eastern boundary of the central Basin and Range Province [PDF]

open access: yes, 2000
Approximately 120 km of marine-style deep seismic reflection data were shot during a survey on the waters of Lake Mead in southeastern Nevada. The survey extends from near the abrupt eastern edge of the Basin and Range Province (BRP) to a point ~80 km ...
Brady, Robert   +4 more
core   +1 more source

Giant Quantum Reflection of Neon Atoms from a Ridged Silicon Surface [PDF]

open access: yes, 2001
The specular reflectivity of slow, metastable neon atoms from a silicon surface was found to increase markedly when the flat surface was replaced by a grating structure with parallel narrow ridges.
Berkhout J. J.   +6 more
core   +2 more sources

Enhancing FBG Sensing in the Industrial Application by Optimizing the Grating Parameters Based on NSGA-II

open access: yesSensors, 2022
Fiber Bragg grating (FBG) technology has shown a mutation in developing fiber optic-based sensors because of their tiny size, high dielectric strength, distributed sensing, and immunity to high voltage and magnetic field interference.
Yasser Elsayed, Hossam A. Gabbar
doaj   +1 more source

The NCAR Airborne 94-GHz Cloud Radar: Calibration and Data Processing

open access: yesData, 2021
The 94-GHz airborne HIAPER Cloud Radar (HCR) has been deployed in three major field campaigns, sampling clouds over the Pacific between California and Hawaii (2015), over the cold waters of the Southern Ocean (2018), and characterizing tropical ...
Ulrike Romatschke   +6 more
doaj   +1 more source

The Ability to Assess the Wear of the Carpet Floor by Optical Properties Indicators [PDF]

open access: yesVestnik of Vitebsk State Technological University, 2018
The article discusses the possibility of analysis of the degree of floor carpet wear by their reflectivity indicators. It is shown that the wear of floor carpets considerably changes their optical properties.
А. Naumenko, I. Karpushenko
doaj   +1 more source

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