4,608 research outputs found
Clarifying the effects of interacting dark energy on linear and non-linear structure formation processes
No full textWe present a
detailed numerical study of the impact that cosmological
models featuring a direct interaction between the dark energy component
that drives the accelerated expansion of the Universe and cold dark
matter can have on the linear and non-linear stages of structure
formation. By means of a series of collisionless N-body simulations, we
study the influence that each of the different effects characterizing
these cosmological models - which include among others a fifth force, a
time variation of particle masses and a velocity-dependent acceleration
- separately have on the growth of density perturbations and on a series
of observable quantities related to linear and non-linear cosmic
structures, as the matter power spectrum, the gravitational bias between
baryons and cold dark matter, the halo mass function and the halo
density profiles. We perform our analysis applying and comparing
different numerical approaches previously adopted in the literature, and
we address the partial discrepancies recently claimed in a similar study
by Li & Barrow with respect to the first outcomes of Baldi et al.,
which are found to be related to the specific numerical approach adopted
in the former work. Our results fully confirm the conclusions of Baldi
et al. and show that when linear and non-linear effects of the
interaction between dark energy and cold dark matter are properly
disentangled, the velocity-dependent acceleration is the leading effect
acting at non-linear scales and in particular is the most important
mechanism in lowering the concentration of cold dark matter haloes
The nonlinear evolution of large scale structures in Growing Neutrino cosmologies
No full textWe present the results of the first N-body simulations of the Growing
Neutrino scenario, as recently discussed in Baldi et al. (2011). Our results
have shown for the first time how neutrino lumps forming in the context of
Growing Neutrino cosmologies are expected to pulsate as a consequence of the
rapid oscillations of the dark energy scalar field. We have also computed for
the first time a realistic statistical distribution of neutrino halos and
determined their impact on the underlying Cold Dark Matter structures
Supporting evidences for potential biomarkers of endometriosis detected in peripheral blood
No full textAbstractIncidence of endometriosis is very high in women in the reproductive age (around 10%). To date, a reliable non-invasive diagnostic test for early diagnosis of endometriosis is not available. In this article we describe the potential value as diagnostic markers for endometriosis of two proteins (serum albumin and complement C3 precursor), previously identified as differentially expressed in women with endometriosis respect to healthy control by 2D gel analysis. A detailed description of the results obtained with this proteomic approach can be found in Signorile and Baldi [1]. ELISAs were performed on a large cohort of endometriosis (n=100) and healthy patients (n=10) to establish the differential expression of the identified proteins. ROC analyses confirmed the statistical significance of the differential expression of these proteins: serum albumin (p=0.028) ad complement C3 precursor (p=0.082). Evaluation of these two proteins, together with the already described Zn-alpha2-glycoprotein [1], could help in the early identification of endometriosis patient
Il Carcer nella produzione di Cardano
No full textAlongside a larger analysis of Cardano's moral philosophy since the De consolatione (1542), the essay focuses on the dialogue Carcer, and suggests a relationship between the difficulties encountered by the author in the Duchy of Milan in 1560-61, and the trial of 1570 in Bologna. Special attention is devoted to the philosophical reasons that support in the Carcer the Plutarchean sera numinis vindicta, one of Cardano's favorites topics
Comparing three possible hypoelliptic Laplacians on the 5-dimensional Cartan group via div-curl type estimates
No full textOn general Carnot groups, the definition of a possible hypoelliptic Hodge-Laplacian on forms using
the Rumin complex has been considered in (M. Rumin, “Differential geometry on C-C spaces and application
to the Novikov-Shubin numbers of nilpotent Lie groups,” C. R. Acad. Sci., Paris Sér. I Math., vol. 329, no. 11, pp.
985–990, 1999, M. Rumin, “Sub-Riemannian limit of the differential form spectrum of contactmanifolds,” Geom.
Funct. Anal., vol. 10, no. 2, pp. 407–452, 2000), where the author introduced a 0-order pseudodifferential operator
on forms. However, for questions regarding regularity for example, where one needs sharp estimates, this
0-order operator is not suitable. Up to now, there have only been very few attempts to define hypoelliptic Hodge-
Laplacians on forms that would allow for such sharp estimates. Indeed, this question is rather difficult to address
in full generality, the main issue being that the Rumin exterior differential dc is not homogeneous on arbitrary
Carnot groups. In this note, we consider the specific example of the free Carnot group of step 3 with 2 generators,
and we introduce three possible definitions of hypoelliptic Hodge-Laplacians.We compare how these three possible
Laplacians can be used to obtain sharp div-curl type inequalities akin to those considered by Bourgain &
Brezis and Lanzani & Stein for the de Rham complex, or their subelliptic counterparts obtained by Baldi, Franchi
& Pansu for the Rumin complex on Heisenberg groups
R. Baldi, // contratto di agenzia, 3e éd
No full textR. Baldi, // contratto di agenzia, 3e éd. In: Revue internationale de droit comparé. Vol. 35 N°1, Janvier-mars 1983. pp. 237-238
R. Baldi, Il contratto di agenzia
No full textR. Baldi, Il contratto di agenzia. In: Revue internationale de droit comparé. Vol. 24 N°4, Octobre-décembre 1972. pp. 905-906
R. Baldi, contralto di agenzia, 5e éd
No full textR. Baldi, contralto di agenzia, 5e éd. In: Revue internationale de droit comparé. Vol. 44 N°4, Octobre-décembre 1992. pp. 1012-1013
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