12,668 research outputs found
Metabolic syndrome and the immunological affair with the blood-brain barrier
Copyright © 2015 Mauro, De Rosa, Marelli-Berg and Solito. This is an open-access
article distributed under the terms of the
Creative Commons Attribution License (CC
BY)
. The use, distribution or reproduction in other forums is permitted, provided the
original author(s) or licensor are credited and that the original publication in this
journal is cited, in accordance with accepted academic practice. No use, distribution or
reproduction is permitted which does not comply with these terms
Room temperature GW bar detector with opto-mechanical readout
We present the full implementation of a room-temperature gravitational wave
bar detector equipped with an opto-mechanical readout. The mechanical
vibrations are read by a Fabry--Perot interferometer whose length changes are
compared with a stable reference optical cavity by means of a resonant laser.
The detector performance is completely characterized in terms of spectral
sensitivity and statistical properties of the fluctuations in the system output
signal. The new kind of readout technique allows for wide-band detection
sensitivity and we can accurately test the model of the coupled oscillators for
thermal noise. Our results are very promising in view of cryogenic operation
and represent an important step towards significant improvements in the
performance of massive gravitational wave detectors.Comment: 7 figures, submitted to Phys. Rev.
Open up Internet Research
Nel 2007 il Times sceglieva l’utente del web come persona dell’anno: Yes, You.
You Control the Information Age. Welcome to Your World. Dal 2007 molta acqua sotto i
ponti della Rete è passata e, a otto anni da quella copertina, il nuovo mondo è cresciuto in
mole e complessità , così come si sono moltiplicati i tentativi da parte della ricerca, pubblica
e privata, di mettere ordine nella comprensione dei meccanismi che lo governano.
Obiettivo di questa rubrica è fornire alcuni primi riferimenti per orientarsi nel
mondo della ricerca e dello studio intorno alla Rete. Ognuno di questi costituisce un hub di
collegamento a network e comunitĂ professionali ampie ed accreditate da cui imparare e
con cui confrontarsi
The relevance of the theory of fiscal illusion. The case of the Italian tax system
This work analyses the phenomenon of fiscal illusion (Puviani, 1903) in the context of the Italian tax system. Financial (or fiscal) illusion refers to mechanisms which cause a cognitive alteration on the part of the taxpayer regarding the evaluation of the costs and benefits of public policies.
Puviani (1903) was the first to classify the different types of financial illusions. He highlighted the main strategies used to hide the real costs of financing public goods and services through taxes (illusions on revenue) or to overestimate their usefulness (illusions on expenditure).
The main conclusions of the work are that: (i) from a methodological point of view, there is a connection between Puviani’s theory of fiscal illusion and some of the assumptions of the behavioral approach and (ii) from an operational point of view, it is a useful tool to understand the motives that could have inspired several recent taxes and legislative measures within the Italian tax system. These results support the relevance of Puviani’s theory to the contemporary theory and practice of public finance
Chiral Lagrangians with tensor sources
The implementation of tensor sources in Chiral Lagrangians allows the
computation of Green functions and form factors involving tensor currents, that
is, quark bilinears of the form \bar{q}_i\sigma^{\mu\nu}q_j. Whereas only four
new terms show up at O(p^4), we find around a hundred of them at O(p^6). So it
becomes essential to ensure that this set o operators is indeed minimal and
non-redundant (i.e., it is a basis). We discuss two phenomenological
applications in the context of vector meson resonances and the radiative pion
decay.Comment: Talk given at the 4th International Worshop on Quantum
ChromoDynamics, Theory and experiment, June 16-20, 2007. Martina Franca -
Valle d'Itria - Ital
Variáveis relacionadas ao rendimento da incubação de ovos em matrizes de frangos de corte.
bitstream/item/58383/1/CUsersPiazzonDocuments246.pdfAcesso em: 13 jun. 2007
Acyclic orientations with path constraints
Many well-known combinatorial optimization problems can be stated over the
set of acyclic orientations of an undirected graph. For example, acyclic
orientations with certain diameter constraints are closely related to the
optimal solutions of the vertex coloring and frequency assignment problems. In
this paper we introduce a linear programming formulation of acyclic
orientations with path constraints, and discuss its use in the solution of the
vertex coloring problem and some versions of the frequency assignment problem.
A study of the polytope associated with the formulation is presented, including
proofs of which constraints of the formulation are facet-defining and the
introduction of new classes of valid inequalities
Experimental measurement of photothermal effect in Fabry-Perot cavities
We report the experimental observation of the photothermal effect. The
measurements are performed by modulating the laser power absorbed by the
mirrors of two high-finesse Fabry-Perot cavities. The results are very well
described by a recently proposed theoretical model [M. Cerdonio, L. Conti, A.
Heidmann and M. Pinard, Phys. Rev. D 63 (2001) 082003], confirming the
correctness of such calculations. Our observations and quantitative
characterization of the photothermal effect demonstrate its critical importance
for high sensitivity interferometric displacement measurements, as those
necessary for gravitational wave detection.Comment: 4 pages, 3 figures, submitted to Phys. Rev. Let
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