2,471 research outputs found
Behavior of the Dripping Faucet over a Wide Range of the Flow Rate
The time interval of successive water-drips from a faucet was examined over a
wide range of the flow rate. The dripping interval alternately exhibits a
stable state and a chaotic state as the flow rate increases. In the stable
state, the volume of the drip is kept constant at fixed flow rates, and the
constant volume increases with the flow rate. In the chaotic state, in addition
to a mechanics that the drip is torn by its own weight, the vibration of the
drip on the faucet takes part in the strange behavior of the interval.Comment: 7 pages, 7 figures, to be published in J. Phys. Soc. Jpn vol
68-2(1999
Dynamical estimates of chaotic systems from Poincar\'e recurrences
We show that the probability distribution function that best fits the
distribution of return times between two consecutive visits of a chaotic
trajectory to finite size regions in phase space deviates from the exponential
statistics by a small power-law term, a term that represents the deterministic
manifestation of the dynamics, which can be easily experimentally detected and
theoretically estimated. We also provide simpler and faster ways to calculate
the positive Lyapunov exponents and the short-term correlation function by
either realizing observations of higher probable returns or by calculating the
eigenvalues of only one very especial unstable periodic orbit of low-period.
Finally, we discuss how our approaches can be used to treat data coming from
complex systems.Comment: subm. for publication. Accepted fpr publication in Chao
A Three-Dimensional Code for Muon Propagation through the Rock: MUSIC
We present a new three-dimensional Monte-Carlo code MUSIC (MUon SImulation
Code) for muon propagation through the rock. All processes of muon interaction
with matter with high energy loss (including the knock-on electron production)
are treated as stochastic processes. The angular deviation and lateral
displacement of muons due to multiple scattering, as well as bremsstrahlung,
pair production and inelastic scattering are taken into account. The code has
been applied to obtain the energy distribution and angular and lateral
deviations of single muons at different depths underground. The muon
multiplicity distributions obtained with MUSIC and CORSIKA (Extensive Air
Shower simulation code) are also presented. We discuss the systematic
uncertainties of the results due to different muon bremsstrahlung
cross-sections.Comment: 24 pages, 11 Postscript figures, LaTeX, to be published in
Astroparticle Physic
Monte Carlo Simulations of Some Dynamical Aspects of Drop Formation
In this work we present some results from computer simulations of dynamical
aspects of drop formation in a leaky faucet. Our results, which agree very well
with the experiments, suggest that only a few elements, at the microscopic
level, would be necessary to describe the most important features of the
system. We were able to set all parameters of the model in terms of real ones.
This is an additional advantage with respect to previous theoretical works.Comment: 7 pages (Latex), 6 figures (PS) Accepted to publication in Int. J.
Mod. Phys. C Source Codes at http://www.if.uff.br/~arlim
Long Range Anticorrelations and Non-Gaussian Behavior of a Leaky Faucet
We find that intervals between successive drops from a leaky faucet display
scale-invariant, long-range anticorrelations characterized by the same
exponents of heart beat-to-beat intervals of healthy subjects. This behavior is
also confirmed by numerical simulations on lattice and it is faucet-width- and
flow-rate-independent. The histogram for the drop intervals is also well
described by a L\'evy distribution with the same index for both histograms of
healthy and diseased subjects. This additional result corroborates the evidence
for similarities between leaky faucets and healthy hearts underlying dynamics.Comment: Self-extracting uuencoded postscript file. Phys.Rev.E (Rap.Comm.).
Related papers can be found at http://www.if.uff.br/~tjpp/tjppe.htm
Mitomycin resistance in mammalian cells expressing the bacterial mitomycin C resistance protein MCRA
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