15,023 research outputs found
Application of nonextensive statistics to particle and nuclear physics
We present an overview of possible imprints of non-extensitivity in particle
and nucler physics. Special emphasis is put on the intrinsic fluctuations
present in the system under consideration as the possible source of
nonextensivity. The possible connection of nonextensivity and the self
organized criticality apparently being observed in some cosmic rays and
hadronic experiments will also be discussed.Comment: Contribution to International School and Conference on "Non Extensive
Thermodynamics and physical applications", Villasimius-Capo Boi (Cagliari),
Italy, 23-30 March 200
Rapidity Spectra Analysis in Terms of Non Extensive Statistic Approach
We provide description of rapidity spectra of particles produced in p-anti-p
collisions using anomalous diffusion approach to account for their
non-equilibrium character. In particular, we exhibit connection between
multiproduction processes and anomalous diffusion described through the
nonlinear Focker-Planck equation with nonlinearity given by the nonextensivity
parameter q describing the underlying Tsallis q-statistics and demonstrate how
it leads to the Feynman scaling violation in these collisions. The q parameter
obtained this way turns out to be closely connected to parameter 1/k converting
the original poissonian multiplicity distribution to its observed Negative
Binomial form. The inelasticity of reaction has been also calculated and found
to slightly decrease with the increasing energy of reaction.
Keywords: inelasticity, rapidity spectra, nonextensivityComment: 4 pages, 4 figures, Presented at XII International Symposium on Very
High Energy Cosmic Ray Interactions, CERN, Switzerland, 15-20 July 200
Self-organized criticality in atmospheric cascades
We argue that atmospheric cascades can be regarded as example of the
self-organized criticality and studied by using Levy flights and nonextensive
approach. It allows us to understand the scale-invariant energy fluctuations
inside cascades in a natural way.Comment: gz-compressed .tar file containing LaTeX file and 5 PS files with
figures, 4 pages altogether (Nucl. Phys. B style, espcrc2.sty file attached)
Presented at XI International Symposium On Very High Energy Cosmic Ray
Interaction, Campinas, Brazil, July 17-21, 2000. To be published in Nucl.
Phys. B (Proc. Suppl.). Some typos correcte
Inferences, Experiences, and the Myth of the Given: A Reply to Champagne
In a recent article in this journal, Marc Champagne leveled an argument against what Wilfrid Sellars dubbed “the Myth of the Given.” Champagne contends that what is given in observation in the form of a sensation must be able to both cause and justify propositionally structured beliefs. He argues for this claim by attempting to show that one cannot decide which of two equally valid chains of inference is sound without appeal to what is given in experience. In this note, I show that while this argument is sound, the conclusion he draws is far too strong. Champagne’s argument shows only that our empirical beliefs are determined through experience. It does not license the stronger claim that, in order for us to have empirical knowledge, bare sensations must be able to justify beliefs
Fluctuations, correlations and non-extensivity
The present status of investigations on fluctuations and correlations seen in
high energy multiparticle production processes made using the notion of
nonextensivity is reviewed.Comment: Minireview presented at XXXVI International Symposium on
Multiparticle Dynamica, September 2-8, 2006, Paraty (RJ), Brazil; to be
published in Braz. J. Phys. (2007). Some misprints correcte
THE MEASUREMENT OF THE ECONOMIC DISTANCE ON THE BASIS OF SYMBOLIC DATA
The economic distance defines a dissimilarity level between objects functioning in the economic space. It is one of the most important issues of spatial econometrics. However its measurement is difficult due to the definition, description and estimation problems. The objective of the paper is to indicate the role of symbolic data in describing the economic distance and also the way of its measurement using symbolic data analysis methods. A significance of the economic distance, measurement problems, symbolic data concept and dissimilarity measures, and also an empirical example were presented in the paper
Carrying Loss
Carrying Loss is a creative nonfiction piece I wrote based off of someone I know, a mother who discovers that she is pregnant with a baby that has Trisomy 18, a genetic disease with very low survival rates. This piece follows the internal struggle of the mother as she deals with this information, and decides to carry the baby to full term, despite the fact he has passed inside of her. It ends on the day of the baby\u27s birth as a still born
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