519 research outputs found
A map on the space of rational functions
We describe dynamical properties of a map defined on the space
of rational functions. The fixed points of are classified and
the long time behavior of a subclass is described in terms of Eulerian
polynomials
Investigation of the interfacial adhesion of glass bead-filled multicomponent injection moulded composites
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A Map on the Space of Rational Functions
We describe dynamical properties of a map defined on the space of rational functions. The fixed points of F are classified and the long time behavior of a subclass is described in terms of Eulerian polynomials
Upper and Lower Bounds for Weak Backdoor Set Detection
We obtain upper and lower bounds for running times of exponential time
algorithms for the detection of weak backdoor sets of 3CNF formulas,
considering various base classes. These results include (omitting polynomial
factors), (i) a 4.54^k algorithm to detect whether there is a weak backdoor set
of at most k variables into the class of Horn formulas; (ii) a 2.27^k algorithm
to detect whether there is a weak backdoor set of at most k variables into the
class of Krom formulas. These bounds improve an earlier known bound of 6^k. We
also prove a 2^k lower bound for these problems, subject to the Strong
Exponential Time Hypothesis.Comment: A short version will appear in the proceedings of the 16th
International Conference on Theory and Applications of Satisfiability Testin
Implementation status of mandatory inspection of sprayers in Romania
To harmonize the Romanian legislation on plant protection to the European legislation the Directive 128/2009 has been transposed into national legislation by Government Emergency Ordinance 34/2012 on establishing the institutional framework for action to the sustainable use of pesticides in Romania.National Action Plan approved by Decision 683/2013, on reducing the risks associated with the use of plant protection products is the strategic document regarding the continuous improvement of the use of plant protection products and contains quantitative targets, measures and timetables to reduce risks and the effects of using plant protection products on the environment and human health
Tracing the origin of the single-spin asymmetries observed in inclusive hadron production processes at high energies
It is pointed out that the existing models for the left-right asymmetries
observed in single-spin inclusive hadron production processes can be
differentiated experimentally. Several such experiments are proposed with which
the basic assumptions of these models can be tested individually.Comment: 12 pages, one figur
An Algorithm for Dualization in Products of Lattices and Its Applications
Let \cL=\cL_1×⋅s×\cL_n be the product of n lattices, each of which has a bounded width. Given a subset \cA\subseteq\cL, we show that the problem of extending a given partial list of maximal independent elements of \cA in \cL can be solved in quasi-polynomial time. This result implies, in particular, that the problem of generating all minimal infrequent elements for a database with semi-lattice attributes, and the problem of generating all maximal boxes that contain at most a specified number of points from a given n-dimensional point set, can both be solved in incremental quasi-polynomial time
Parton Distributions for the Octet and Decuplet Baryons
We calculate the parton distributions for both polarized and unpolarized
octet and decuplet baryons, using the MIT bag, dressed by mesons. We show that
the hyperfine interaction responsible for the and splittings leads to large deviations from SU(3) and SU(6) predictions.
For the we find significant polarized, non-strange parton
distributions which lead to a sizable polarization in polarized,
semi-inclusive scattering. We also discuss the flavour symmetry violation
arising from the meson-cloud associated with the chiral structure of baryons.Comment: 29 pages, 15 figure
Quark Distributions of Octet Baryons from SU(3) Symmetry
SU(3) symmetry relations between the octet baryons are introduced in order to
connect both the unpolarized and polarized quark distributions of the octet
baryons with those of the nucleon. Two different parametrizations of the
nucleon quark distributions are used. A new scenario of quark flavor and spin
structure of the is found and compared with two other models: a
perturbative QCD based analysis and a quark diquark model. The and
quarks inside the are predicted to be positively polarized at large
Bjorken variable in the new scenario. By using an approximate relation
connecting the quark fragmentation functions with the quark distributions, the
hadron polarizations of the octet baryons in -annihilation, polarized
charged lepton deep inelastic scattering (DIS) processes, and neutrino
(antineutrino) DIS processes are predicted. The predictions for
polarizations in several processes are compatible with the available data at
large fragmentation momentum fraction , and support the prediction of
positively polarized and quarks inside the at large .
Predictions for Drell-Yan processes from and beams on an
isoscalar target are also given and discussed.Comment: 29 latex pages, 16 figures, to appear in PR
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