Buscar
Mostrando ítems 41-50 de 13982
Upconversion ultraviolet random lasing in Nd 3+ doped fluoroindate glass powder
(2011-03-14)
An upconversion random laser (RL) operating in the ultraviolet is reported for Nd 3+ doped fluoroindate glass powder pumped at 575 nm. The RL is obtained by the resonant excitation of the Nd 3+ state 2G 7/2 followed by ...
Effect of nonidentical signal phases on signal amplification of two coupled excitable neurons
(ElsevierAmsterdam, 2014-03-15)
In this paper, we study the response of two coupled excitable neurons to external subthreshold periodic signals. We find that the neurons' response to the subthreshold signals can be enhanced when the signal phases are ...
Superfluid 4He: brief notes on collective energy excitations and specific heat.
(Instituto de Física USPSão Paulo, 2013)
These brief notes about some amazing properties of the helium superfluid have been written to graduate and postgraduate students of physics. We have estimated some collective energy excitations (linear vortices, energy ...
Identification of lowest excited states in the organometallic iron-nitrile complexes
(1999)
Electronic absorption spectra for the complexes [CpFe(dppe)NC-R]PF6 R = CH2-C6H4-ON3P3(OC 6H4t-Bu)5 (1), R = CH2-C6H4-OH (2) and R = CH3 (3) in different solvents have been measured. The two absorption bands at the lowest ...
Prefrontal cortex excitability in early postnatally malnourished rats
(Informa Healthcare, 1986)
The effect of early postnatal malnutrition on the responsiveness of the rat prefrontal cortex was studied by determining excitability thresholds and fatigability to direct cortical stimulation. Malnutrition imposed during ...
Some comments on the numerical simulation of self-synchronization of four non-ideal exciters
(Elsevier B.V., 2005-05-16)
In this paper, self-synchronization of four non-ideal exciters is examined via numerical simulation. The mathematical model consists of four unbalanced direct Current motors with limited power supply mounted on a flexible ...
Some comments on the numerical simulation of self-synchronization of four non-ideal exciters
(Elsevier B.V., 2005-05-16)
In this paper, self-synchronization of four non-ideal exciters is examined via numerical simulation. The mathematical model consists of four unbalanced direct Current motors with limited power supply mounted on a flexible ...
Optimal linear control driven for piezoelectric non-linear energy harvesting on non-ideal excitation sourced
(2014-01-01)
Non-linear energy harvesting system was project to enhance interaction to ambient vibration that is wide band and low power which difficult the design for resonant solution. To improve efficiency of a non-linear design it ...
Central limit theorem for the excited random walk in dimension d >= 2
(UNIV WASHINGTON, DEPT MATHEMATICS, 2007)
We prove that a law of large numbers and a central limit theorem hold for the excited random walk model in every dimension d >= 2.
A contribution for nonlinear structural dynamics characterization of cantilever beams
(2005-12-01)
Successful experiments in nonlinear vibrations have been carried out with cantilever beams under harmonic base excitation. A flexible slender cantilever has been chosen as a convenient structure to exhibit modal interactions, ...