Navegação Ciências Exatas e da Terra por Autor "Gallas, Jason Alfredo Carlson"
Resultados 21-32 de 32
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Observation of deterministic chaos in electrical discharges in gases
Braun, Thomas; Lisboa, Jorge Amoretti; Francke Sandoval, Ricardo Eugenio; Gallas, Jason Alfredo Carlson (1987) [Artigo de periódico]We report that dc-excited discharges in gases display current oscillations which develop into deterministically chaotic behavior. A period-doubling route to chaos characteristic of 1D maps is established for sealed discharges ... -
Pattern formation in diffusive-advective coupled map lattices
Lind, Pedro Gonçalves; Corte-Real, João Alexandre Medina; Gallas, Jason Alfredo Carlson (2004) [Artigo de periódico]We investigate pattern formation and evolution in coupled map lattices when advection is incorporated, in addition to the usual diffusive term. All patterns may be suitably grouped into five classes: three periodic, ... -
Periodicity hub and nested spirals in the phase diagram of a simple resistive circuit
Bonatto, Cristian; Gallas, Jason Alfredo Carlson (2008) [Artigo de periódico]We report the discovery of a remarkable ‘‘periodicity hub’’ inside the chaotic phase of an electronic circuit containing two diodes as a nonlinear resistance. The hub is a focal point from where an infinite hierarchy of ... -
Periodic neural activity induced by network complexity
Paula, Demetrius Ribeiro de; Araújo, Ascânio Dias; Andrade Júnior, José Soares; Herrmann, Hans Jurgen; Gallas, Jason Alfredo Carlson (2006) [Artigo de periódico]We study a model for neural activity on the small-world topology of Watts and Strogatz and on the scale-free topology of Barabási and Albert. We find that the topology of the network connections may spontaneously induce ... -
Rapidly converging bounds for the ground-state energy of hydrogenic atoms in superstrong magnetic fields
Rech, Paulo Cesar; Gallas, Marcia Russman; Gallas, Jason Alfredo Carlson (1989) [Artigo de periódico] -
Reducing stochasticity in the North Altantic Oscillation index with coupled Langevin equations
Lind, Pedro Gonçalves; Mora, Alejandro; Gallas, Jason Alfredo Carlson; Haase, Maria (2005) [Artigo de periódico]We present a critical investigation of the functional relationship between the two pressure time series routinely used to define the index characterizing the North Atlantic Oscillation NAO , well known to regulate global ... -
Relative abundance and structure of chaotic behavior : the nonpolynomial Belousov-Zhabotinsky reaction kinetics
Freire, Joana G.; Field, Richard J.; Gallas, Jason Alfredo Carlson (2009) [Artigo de periódico]We report a detailed numerical investigation of the relative abundance of periodic and chaotic oscillations in phase diagrams for the Belousov–Zhabotinsky (BZ) reaction as described by a nonpolynomial, autonomous, ... -
Self-similarities in the frequency-amplitude space of a loss-modulated CO/sub 2/ laser
Bonatto, Cristian; Garreau, Jean Claude; Gallas, Jason Alfredo Carlson (2005) [Artigo de periódico]We show the standard two-level continuous-time model of loss-modulated CO2 lasers to display the same regular network of self-similar stability islands known so far to be typically present only in discretetime models based ... -
Some matrix elements for morse oscillators
Gallas, Jason Alfredo Carlson (1980) [Artigo de periódico]In this paper general working equations for the Morse (r-r,)' rnatrix elements are given. These equations can be used to calculate the diagonal (m = n ) matrix elements and, for the off-diagonal (m≠n) elements, are simpler ... -
Spatial updating, spatial transients, and regularities of a complex automaton with nonperiodic architecture
Freire, Joana G.; Brison, Owen J.; Gallas, Jason Alfredo Carlson (2007) [Artigo de periódico]We study the dynamics of patterns exhibited by rule 52, a totalistic cellular automaton displaying intricate behaviors and wide regions of active/inactive synchronization patches. Systematic computer simulations involving ... -
The influence of vibration-rotation interaction on band intensity parameters for ZrO and CuH
Gallas, Jason Alfredo Carlson; Francke Sandoval, Ricardo Eugenio; Grieneisen, Hans Peter Henrik; Chakraborty, Bijoy P. (1979) [Artigo de periódico]Effects of vibration-rotation interaction have been studied on the band intensity parameters of ZrO and CuH molecules. Band strengths have been calculated for the ZrO α(C³3Δ-X' 3Δ) band system, and, in the absence of an ... -
Zig-zag networks of self-excited periodic oscillations in a tunnel diode and a fiber-ring laser
Francke Sandoval, Ricardo Eugenio; Poschel, Thorsten; Gallas, Jason Alfredo Carlson (2013) [Artigo de periódico]We report numerical evidence showing that periodic oscillations can produce unexpected andwide-ranging zigzag parameter networks embedded in chaos in the control space of nonlinear systems. Such networks interconnect ...