Results 21 to 30 of about 96,778 (297)

Signal amplification and control in optical cavities with off-axis feedback [PDF]

open access: yes, 2007
We consider a large class of optical cavities and gain media with an off-axis external feedback which introduces a two-point nonlocality. This nonlocality moves the lasing threshold and opens large windows of control parameters where weak light spots can
Francesco Papoff   +2 more
core   +3 more sources

The Top Ten solar analogs in the ELODIE library [PDF]

open access: yes, 2004
Several solar analogs have been identified in the library of high resolution stellar spectra taken with the echelle spectrograph ELODIE. A purely differential method has been used, based on the chi2 comparison of a large number of G dwarf spectra to 8 ...
A. Triaud   +54 more
core   +1 more source

Distribuição espacial e abundância de carrapatos (Acari: Ixodidae) em remanescente de Mata Atlântica, Nordeste do Brasil

open access: yesPesquisa Veterinária Brasileira
RESUMO: A distribuição espacial e a abundância de carrapatos em estágio de vida livre foram examinadas em fragmentos de Mata Atlântica no Nordeste do Brasil.
Cristina F. da Fonseca   +7 more
doaj   +1 more source

The interiorization of Brazilian violence, policing, and economic growth

open access: yesEconomiA, 2015
Brazilian homicide rates are among the highest in the world, inclusive of actual war zones. However, the character of Brazil's violence is changing.
Geoffrey M. Steeves   +2 more
doaj   +1 more source

Function Photonic Crystals

open access: yes, 2012
In the paper, we present a new kind of function photonic crystals, which refractive index is a function of space position. Unlike conventional PCs, which structure grow from two materials, A and B, with different dielectric constants $\epsilon_{A}$ and $\
Bai-Jun Zhang   +23 more
core   +1 more source

Price index dispersion and utilitarian social evaluation [PDF]

open access: yesEconomics Letters, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Determination of Stellar Surface Temperature Using Ultraviolet Spectra [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
Color indexes and effective temperatures for 25 standard stars have been determined as a pilot project which show a relationship between color index and effective temperature in ultraviolet region.
Young Woon Kang   +5 more
doaj  

Do stellar magnetic cycles influence the measurement of precise radial velocities?

open access: yes, 2010
The ever increasing level of precision achieved by present and future radial-velocity instruments is opening the way to discovering very low-mass, long-period planets (e.g. solar-system analogs).
Boisse   +47 more
core   +1 more source

Arrhythmic risk in elderly patients candidates to transcatheter aortic valve replacement. predicative role of repolarization temporal dispersion [PDF]

open access: yes, 2019
Degenerative aortic valve stenosis (AS) is associated to ventricular arrhythmias and sudden cardiac death, as well as mental stress in specific patients. In such a context, substrate, autonomic imbalance as well as repolarization dispersion abnormalities ...
Crapanzano, Davide   +11 more
core   +1 more source

High-index-core Bragg fibers: dispersion properties

open access: yesOptics Express, 2003
We study the group-velocity-dispersion properties of a novel type of Bragg fibers. These new structures are cylindrically symmetric microstructured fibers having a high-index core (silica in our case), like in conventional photonic crystal fibers, surrounded by a multilayered cladding, which is formed by a set of alternating layers of silica and a ...
Juan, Monsoriu   +4 more
openaire   +2 more sources

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