932 research outputs found
Multiple-relaxation-time Finsler-Lagrange dynamics in a compressed Langmuir monolayer
In this paper an information geometric approach has been proposed to describe
the two-dimensional (2d) phase transition of the first order in a monomolecular
layer (monolayer) of amphiphilic molecules deposited on air/water interface.
The structurization of the monolayer was simulated as an entropy evolution of a
statistical set of microscopic states with a large number of relaxation times.
The electrocapillary forces are considered as information constraints on the
statistical manifold. The solution curves of Euler-Lagrange equations and the
Jacobi field equations point out contracting pencils of geodesic trajectories
on the statistical manifold, which may change into spreading ones, and
converse. It was shown that the information geometrodynamics of the first-order
phase transition in the Langmuir monolayer finds an appropriate realization
within the Finsler-Lagrange framework
Serializing the Parallelism in Parallel Communicating Pushdown Automata Systems
We consider parallel communicating pushdown automata systems (PCPA) and
define a property called known communication for it. We use this property to
prove that the power of a variant of PCPA, called returning centralized
parallel communicating pushdown automata (RCPCPA), is equivalent to that of
multi-head pushdown automata. The above result presents a new sub-class of
returning parallel communicating pushdown automata systems (RPCPA) called
simple-RPCPA and we show that it can be written as a finite intersection of
multi-head pushdown automata systems
Large scale distribution of total mass versus luminous matter from Baryon Acoustic Oscillations: First search in the SDSS-III BOSS Data Release 10
Baryon Acoustic Oscillations (BAOs) in the early Universe are predicted to
leave an as yet undetected signature on the relative clustering of total mass
versus luminous matter. A detection of this effect would provide an important
confirmation of the standard cosmological paradigm and constrain alternatives
to dark matter as well as non-standard fluctuations such as Compensated
Isocurvature Perturbations (CIPs). We conduct the first observational search
for this effect, by comparing the number-weighted and luminosity-weighted
correlation functions, using the SDSS-III BOSS Data Release 10 CMASS sample.
When including CIPs in our model, we formally obtain evidence at of
the relative clustering signature and a limit that matches the existing upper
limits on the amplitude of CIPs. However, various tests suggest that these
results are not yet robust, perhaps due to systematic biases in the data. The
method developed in this Letter, used with more accurate future data such as
that from DESI, is likely to confirm or disprove our preliminary evidence.Comment: 6 pages, 2 figures, accepted for publication in PR
Einstein’s Equation in Nuclear and Solar Energy
Starting from the equation of Einstein (E = m·c2), the chapter proposes a simple and fundamental presentation of the fission and fusion principles, together with some of their applications: nuclear reactors and nuclear propulsion vessels and submarines. Fission and fusion are chosen between the multiple forms of energy, as being the most important forms of nuclear energy, directly related with the equation of Einstein. Some characteristics of solar energy, produced from the fusion process inside the Sun, are deducted from the same equation of Einstein: thermal power of solar radiation; specific power of solar radiation; surface temperature of the Sun; solar constant on different planets, etc. The yearly variation of the solar radiation on each planet of the solar system is also presented
Observations and model calculations of an additional layer in the topside ionosphere above Fortaleza, Brazil
Status, prospects and management of small pelagic fisheries in India
The annual small pelagic fish production increased from 0.30 million
mt during 1950-54 to 1.24 million mt during 1996 along the Indian coast.
The 4 fold increase was possible due to several technological
advancements. The potenrial yield from the pelagic resources of the EEZ is
estimated to be 2.2 million mt. As there is no further scope for increasing
the production from the inshore waters, there is need to bring the outer
shelf and oceanic waters into increasing levels of exploitation
Convex recovery of a structured signal from independent random linear measurements
This chapter develops a theoretical analysis of the convex programming method
for recovering a structured signal from independent random linear measurements.
This technique delivers bounds for the sampling complexity that are similar
with recent results for standard Gaussian measurements, but the argument
applies to a much wider class of measurement ensembles. To demonstrate the
power of this approach, the paper presents a short analysis of phase retrieval
by trace-norm minimization. The key technical tool is a framework, due to
Mendelson and coauthors, for bounding a nonnegative empirical process.Comment: 18 pages, 1 figure. To appear in "Sampling Theory, a Renaissance."
v2: minor corrections. v3: updated citations and increased emphasis on
Mendelson's contribution
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