Results 11 to 20 of about 120,287 (216)

Photonic RF Down-Converter Based on Optomechanical Oscillation [PDF]

, 2008
We demonstrate all-optical radio-frequency (RF) down-conversion in a silica microtoroid optomechanical (OM) oscillator. Preliminary results show that the OM oscillator can simultaneously serve as mixer and local oscillator in a photonic homodyne RF ...
Hossein-Zadeh, Mani, Vahala, Kerry J.
core   +2 more sources

Towards the Design of Gravitational-Wave Detectors for Probing Neutron-Star Physics [PDF]

, 2018
The gravitational waveform of merging binary neutron stars encodes information about extreme states of matter. Probing these gravitational emissions requires the gravitational-wave detectors to have high sensitivity above 1 kHz.
Martynov, Denis, Miao, Haixing, Yang, Huan   +2 more
core   +2 more sources

O papel dos modificadores de rede na produção da fotoluminescência no CaWO4 The role of network modifiers in the production of photoluminescence in CaWO4

Cerâmica, 2004
Discutiu-se a fotoluminescência para o tungstato de cálcio amorfo, observada à temperatura ambiente. Verificou-se que há concordância entre os resultados experimentais e teóricos.
F. R. C. Ciaco, F. M. Pontes, C. D. Pinheiro, E. R. Leite, S. R. de Lazaro, J. A. Varela, P. S. Pizani, C. A. Paskocimas, A. G. Souza, E. Longo   +9 more
doaj   +1 more source

Tools and Procedures for the CTA Array Calibration [PDF]

, 2017
The Cherenkov Telescope Array (CTA) is an international initiative to build the next generation ground-based very-high-energy gamma-ray observatory.
de los Reyes, Raquel, et al., et al., Gaug, Markus, Maccarone, Maria Concetta, Parsons, Dan R.   +4 more
core   +3 more sources

Construction and evaluation of a non-laser optical system for photodynamic process excitation Construção e avaliação de um sistema óptico não-laser para excitação de processos fotodinâmicos

Acta Cirúrgica Brasileira, 2004
Purpose: To show that a non-laser light source can be constructed, using a 500 W Tungsten lamp and optical filters, and that this light source produces photodynamic effect via protoporphyrin IX (PpIX) similar to the effect produced by HeNe laser light ...
Rickson Coelho Mesquita, Edmyr Rosa dos Reis, Jorge Humberto Nicola, Ester Maria Danielli Nicola   +3 more
doaj   +1 more source

Bloch oscillations in optical and Zeeman lattices in the presence of spin-orbit coupling [PDF]

, 2016
We address Bloch oscillations of a spin-orbit coupled atom in periodic potentials of two types: optical and Zeeman lattices. We show that in optical lattices the spin-orbit coupling allows controlling the direction of atomic motion and may lead to ...
Kartashov, Yaroslav V., Konotop, Vladimir V, Torner Sabata, Lluís, Zezyulin, Dmitry A   +3 more
core   +3 more sources

Wave onset in central gray matter - its intrinsic optical signal and phase transitions in extracellular polymers

Anais da Academia Brasileira de Ciências, 2001
The brain is an excitable media in which excitation waves propagate at several scales of time and space. ''One-dimensional'' action potentials (millisecond scale) along the axon membrane, and spreading depression waves (seconds to minutes) at the three ...
VERA M. FERNANDES-DE-LIMA, JOÃO E. KOGLER, JOCELYN BENNATON, WOLFGANG HANKE   +3 more
doaj   +1 more source

Digital spiral object identification using random light [PDF]

, 2017
Photons that are entangled or correlated in orbital angular momentum have been extensively used for remote sensing, object identification and imaging.
Boyd, Robert W, Gao, Boshen, Gao, Lu, Hashemi Rafsanjani, Seyed Mohammad, Long, Gui-Lu, Magaña-Loaiza, Omar S, Mirhosseini, Mohammad, Rafsanjani, Seyed Mohammad Hashemi, Yang, Zhe, Zhou, Yiyu   +9 more
core   +4 more sources

Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances
Uso de dados espectrais para estimar a relação entre óxidos de ferro e minerais 2:1 com suas respectivas reflectâncias

Semina: Ciências Agrárias, 2013
Iron oxides and 2:1 minerals have a strong influence on the spectral behavior of soils. However, studies that address more deeply the relationship between them and their reflectances are scarce.
Everson Cezar, Marcos Rafael Nanni, Marcelo Luiz Chicati, Ivan Granemann de Souza Júnior, Antônio Carlos Saraiva da Costa   +4 more
doaj   +1 more source

New Abundance Determinations of Cadmium, Lutetium, and Osmium in the r-process Enriched Star BD+173248

, 2010
We report the detection of Cd I (Z = 48), Lu II (Z = 71), and Os II (Z = 76) in the metal-poor star BD+173248. These abundances are derived from an ultraviolet spectrum obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope.
Arlandini, Bell, Castelli, Cowan, Cowan, Farouqi, Fedchak, Fuhr, Honda, Honda, Johnson, Kappeler, Kratz, Kwiatkowski, Lawler, Lawler, Lodders, Morton, Roederer, Simmerer, Sneden, Sneden, Westin, Whaling   +23 more
core   +1 more source