480 research outputs found
Existence and regularity of solutions for an evolution model of perfectly plastic plates
We continue the study of a dynamic evolution model for perfectly plastic
plates, recently derived from three-dimensional Prandtl-Reuss plasticity. We
extend the previous existence result by introducing non-zero external forces in
the model, and we discuss the regularity of the solutions thus obtained. In
particular, we show that the first derivatives with respect to space of the
stress tensor are locally square integrable
Il reddito di cittadinanza tra workfare e metamorfosi del lavoro = Citizenship income between workfare and work metamorphosis. WP C.S.D.L.E. “Massimo D’Antona”.IT – 402/2019
The article analyses the main features of the “reddito di cittadinanza”, a minimum income legislation recently introduced in Italy. It highlights the elements of continuity with the discipline previously in force. After investigating the adequacy of the typology of jobs that are offered through the new discipline and of the intricate system of penalty, the article assesses the mechanism of conditionality in the light of constitutional principles and new job-market trends. Finally, the article provides some suggestions about the opportunity to update the “scientific” paradigm on which labour literature have so far relied, thereby opening spaces to a universal and unconditional income scheme that exceeds the currently planned discipline
Insights into Quantum Contextuality and Bell Nonclassicality: A Study on Random Pure Two-Qubit Systems
We explore the relationship between Kochen-Specker quantum contextuality and
Bell-nonclassicality for ensembles of two-qubit pure states. We present a
comparative analysis showing that the violation of a noncontextuality
inequality on a given quantum state reverberates on the Bell-nonclassicality of
the considered state. In particular, we use suitable inequalities that are
experimentally testable to detect quantum contextuality and nonlocality for
systems in a Hilbert space of dimension . While contextuality can be
assessed on different degrees of freedom of the same particle, the violation of
local realism requires parties spatially separated.Comment: Submitted to Int. J. Theor. Phys. as part of the Collection IQSA22 -
Quantum Structures for Interdisciplinary Application
Continuous and Discontinuous Phase Transitions in the evolution of a polygenic trait under stabilizing selective pressure
The presence of phenomena analogous to phase transition in Statistical
Mechanics, has been suggested in the evolution of a polygenic trait under
stabilizing selection, mutation and genetic drift.
By using numerical simulations of a model system, we analyze the evolution of
a population of diploid hermaphrodites in random mating regime. The
population evolves under the effect of drift, selective pressure in form of
viability on an additive polygenic trait, and mutation. The analysis allows to
determine a phase diagram in the plane of mutation rate and strength of
selection. The involved pattern of phase transitions is characterized by a line
of critical points for weak selective pressure (smaller than a threshold),
whereas discontinuous phase transitions, characterized by metastable
hysteresis, are observed for strong selective pressure. A finite size scaling
analysis suggests the analogy between our system and the mean field Ising model
for selective pressure approaching the threshold from weaker values. In this
framework, the mutation rate, which allows the system to explore the accessible
microscopic states, is the parameter controlling the transition from large
heterozygosity (disordered phase) to small heterozygosity (ordered one).Comment: 8 pages, 7 figures, 1 tabl
Signal-to-noise properties of correlation plenoptic imaging with chaotic light
Correlation Plenoptic Imaging (CPI) is a novel imaging technique, that
exploits the correlations between the intensity fluctuations of light to
perform the typical tasks of plenoptic imaging (namely, refocusing out-of-focus
parts of the scene, extending the depth of field, and performing 3D
reconstruction), without entailing a loss of spatial resolution. Here, we
consider two different CPI schemes based on chaotic light, both employing ghost
imaging: the first one to image the object, the second one to image the
focusing element. We characterize their noise properties in terms of the
signal-to-noise ratio (SNR) and compare their performances. We find that the
SNR can be significantly higher and easier to control in the second CPI scheme,
involving standard imaging of the object; under adequate conditions, this
scheme enables reducing by one order of magnitude the number of frames for
achieving the same SNR.Comment: 12 pages, 3 figure
Cystic echinococcosis in Italy from the 1950s to present
In Italy the epidemiological pattern of cistic echinococcosis (CE) is incomplete and the information
for most regions is out of date, contradictory, and almost exclusively limited to the intermediate
hosts. The disease is found most frequently in particular social and economic conditions: widespread use
of extensive or semi-extensive sheep farming, illegal slaughtering, and high numbers of sheepdogs and
other types of dogs. The highest incidence in sheep is found in Sardinia (70.6-92.8%), Sicily (6.5-36.5%),
Basilicata (5-28%), Abruzzo (22%) and Tuscany (47%). It North Italy, it is never higher than 0.5% in
slaughtered sheep. No data are available on the biomolecular characterization of the strains of E. granulosus
in Italy, apart from Sardinia and recently Lazio. G1 (Sheep strain), G7 (Pig strain) G2 (Tasmanian
sheep strain) have been identified in Sardinia and G1 and G3 (Buffalo strain) have been recently isolated
in Lazio. In Italy, CE has was also found in buffaloes (2.63-9.8%) and horses (<1%). However, further
epidemiological surveys and genotyping study are necessary. The small quantity of up to date information
on the diffusion of E. granulosus in dogs (Abruzzo 4%, Sardinia 6-10% and Sicily 19.3%) highlights
the need for modern, fast, sensitive and low risk diagnostic methods which would provide a true picture
of the pattern of the infection in this host
Relaxed area of graphs of piecewise Lipschitz maps in the strict BV-convergence
We compute the relaxed Cartesian area in the strict
BV-convergence on a class of piecewise Lipschitz maps from the plane to the plane, having jump made of several curves allowed to meet at a finite number of junction points. We show that the domain of this relaxed area is strictly contained in the domain of the classical
L1-relaxed area
CpGmotifs : a tool to discover DNA motifs associated to CpG methylation events
BackgroundThe investigation of molecular alterations associated with the conservation and variation of DNA methylation in eukaryotes is gaining interest in the biomedical research community. Among the different determinants of methylation stability, the DNA composition of the CpG surrounding regions has been shown to have a crucial role in the maintenance and establishment of methylation statuses. This aspect has been previously characterized in a quantitative manner by inspecting the nucleotidic composition in the region. Research in this field still lacks a qualitative perspective, linked to the identification of certain sequences (or DNA motifs) related to particular DNA methylation phenomena.ResultsHere we present a novel computational strategy based on short DNA motif discovery in order to characterize sequence patterns related to aberrant CpG methylation events. We provide our framework as a user-friendly, shiny-based application, CpGmotifs, to easily retrieve and characterize DNA patterns related to CpG methylation in the human genome. Our tool supports the functional interpretation of deregulated methylation events by predicting transcription factors binding sites (TFBS) encompassing the identified motifs.ConclusionsCpGmotifs is an open source software. Its source code is available on GitHub https://github.com/Greco-Lab/CpGmotifs and a ready-to-use docker image is provided on DockerHub at https://hub.docker.com/r/grecolab/cpgmotifs.Peer reviewe
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