5,347 research outputs found
Intersection sets, three-character multisets and associated codes
In this article we construct new minimal intersection sets in
sporting three intersection numbers with hyperplanes; we
then use these sets to obtain linear error correcting codes with few weights,
whose weight enumerator we also determine. Furthermore, we provide a new family
of three-character multisets in with even and we
also compute their weight distribution.Comment: 17 Pages; revised and corrected result
Intersections of the Hermitian surface with irreducible quadrics in , odd
In , with odd, we determine the possible intersection sizes of
a Hermitian surface and an irreducible quadric
having the same tangent plane at a common point .Comment: 14 pages; clarified the case q=
Intersections of the Hermitian Surface with irreducible Quadrics in even Characteristic
We determine the possible intersection sizes of a Hermitian surface with an irreducible quadric of sharing at least a
tangent plane at a common non-singular point when is even.Comment: 20 pages; extensively revised and corrected version. This paper
extends the results of arXiv:1307.8386 to the case q eve
Same-sex families e genitorialit\ue0 omosessuale. Controversie internazionali e spazi di riconoscimento in Italia
Lesbian and gay parenthood is the most adversed topics of the recognition of lesbian and gay families, both from the point of view of the concession of rights and the one of social legitimation. In Italy, the sociological research on the recognition of lesbian and gay families with children is not comparable to the international one. Nevertheless, the development of a political discourse on the rights of lesbian and gay people \u2013 with or without families, with or without children \u2013 by European institutions is broadening the interest of Italian sociologists. The article analyses the experiences of 12 gay Italian lesbian and gay parents in order to understand how they negotiate and achieve social legitimation in front of their families of origin, local institutions and neighbours. Results show that lesbian and gay families with children give an important contribution for the pluralization of practices and meanings related to the family. At the same time, they reproduce some crucial features supporting the hegemonic interpretation of the family: the centrality of the couple and the importance of blood ties for the definition of kinship
A unifying perspective: the relaxed linear micromorphic continuum
We formulate a relaxed linear elastic micromorphic continuum model with
symmetric Cauchy force-stresses and curvature contribution depending only on
the micro-dislocation tensor. Our relaxed model is still able to fully describe
rotation of the microstructure and to predict non-polar size-effects. It is
intended for the homogenized description of highly heterogeneous, but non polar
materials with microstructure liable to slip and fracture. In contrast to
classical linear micromorphic models our free energy is not uniformly pointwise
positive definite in the control of the independent constitutive variables. The
new relaxed micromorphic model supports well-posedness results for the dynamic
and static case. There, decisive use is made of new coercive inequalities
recently proved by Neff, Pauly and Witsch and by Bauer, Neff, Pauly and Starke.
The new relaxed micromorphic formulation can be related to dislocation
dynamics, gradient plasticity and seismic processes of earthquakes. It unifies
and simplifies the understanding of the linear micromorphic models
Wave propagation in relaxed micromorphic continua: modelling metamaterials with frequency band-gaps
In this paper the relaxed micromorphic model proposed in [Patrizio Neff,
Ionel-Dumitrel Ghiba, Angela Madeo, Luca Placidi, Giuseppe Rosi. A unifying
perspective: the relaxed linear micromorphic continuum, submitted, 2013,
arXiv:1308.3219; and Ionel-Dumitrel Ghiba, Patrizio Neff, Angela Madeo, Luca
Placidi, Giuseppe Rosi. The relaxed linear micromorphic continuum: existence,
uniqueness and continuous dependence in dynamics, submitted, 2013,
arXiv:1308.3762] has been used to study wave propagation in unbounded continua
with microstructure. By studying dispersion relations for the considered
relaxed medium, we are able to disclose precise frequency ranges (band-gaps)
for which propagation of waves cannot occur. These dispersion relations are
strongly nonlinear so giving rise to a macroscopic dispersive behavior of the
considered medium. We prove that the presence of band-gaps is related to a
unique elastic coefficient, the so-called Cosserat couple modulus ,
which is also responsible for the loss of symmetry of the Cauchy force stress
tensor. This parameter can be seen as the trigger of a bifurcation phenomenon
since the fact of slightly changing its value around a given threshold
drastically changes the observed response of the material with respect to wave
propagation. We finally show that band-gaps cannot be accounted for by
classical micromorphic models as well as by Cosserat and second gradient ones.
The potential fields of application of the proposed relaxed model are manifold,
above all for what concerns the conception of new engineering materials to be
used for vibration control and stealth technology
The relaxed linear micromorphic continuum: existence, uniqueness and continuous dependence in dynamics
We study well-posedness for the relaxed linear elastic micromorphic continuum
model with symmetric Cauchy force-stresses and curvature contribution depending
only on the micro-dislocation tensor. In contrast to classical micromorphic
models our free energy is not uniformly pointwise positive definite in the
control of the independent constitutive variables. Another interesting feature
concerns the prescription of boundary values for the micro-distortion field:
only tangential traces may be determined which are weaker than the usual strong
anchoring boundary condition. There, decisive use is made of new coercive
inequalities recently proved by Neff, Pauly and Witsch and by Bauer, Neff,
Pauly and Starke. The new relaxed micromorphic formulation can be related to
dislocation dynamics, gradient plasticity and seismic processes of earthquakes.Comment: arXiv admin note: substantial text overlap with arXiv:1308.321
-Intersection sets in and two-character multisets in
In this article we construct new minimal intersection sets in
with respect to hyperplanes, of size and multiplicity , where
rt \in \ q^2r-3-q^(3r-4)/2, q^2r-3-q^r-2\rqPG(3,q^2)AG(r,q^2)$ satisfying the opposite of the algebraic conditions required in [1]
for quasi--Hermitian varieties
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A lumpy back: extensive cutaneous collagenomas
A widespread form of eruptive collagenomas in a 12-year-old man is presented for the impressive iconography, challenging differential diagnosis, and histopathological considerations associated with such rare connective tissue disorders. Syndromic forms should be carefully investigated for the different course and prognosis. Treatment is a major unsolved issue as aesthetic concerns are significant, especially in young adults
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