2,785 research outputs found
Quantitative isoperimetric inequalities for log-convex probability measures on the line
The purpose of this paper is to analyze the isoperimetric inequality for
symmetric log-convex probability measures on the line. Using geometric
arguments we first re-prove that extremal sets in the isoperimetric inequality
are intervals or complement of intervals (a result due to Bobkov and Houdr\'e).
Then we give a quantitative form of the isoperimetric inequality, leading to a
somehow anomalous behavior. Indeed, it could be that a set is very close to be
optimal, in the sense that the isoperimetric inequality is almost an equality,
but at the same time is very far (in the sense of the symmetric difference
between sets) to any extremal sets! From the results on sets we derive
quantitative functional inequalities of weak Cheeger type
Three-Loop Results in QCD with Wilson Fermions
We calculate the third coefficient of the lattice beta function in QCD with
Wilson fermions, extending the pure gauge results of Luescher and Weisz; we
show how this coefficient modifies the scaling function on the lattice.
We also calculate the three-loop average plaquette in the presence of Wilson
fermions. This allows us to compute the lattice scaling function both in the
standard and energy schemes.Comment: 3 pages, LaTeX (fleqn.sty, espcrc2.sty), contribution to Lattice'97.
Table caption corrected. The longer write-ups are in hep-lat/9801007 (beta
function) and hep-lat/9801003 (plaquette
Evaluation of the Water Film Weber Number in Glaze Icing Scaling
Icing scaling tests were performed in the NASA Glenn Icing Research Tunnel to evaluate a new scaling method, developed and proposed by Feo for glaze icing, in which the scale liquid water content and velocity were found by matching reference and scale values of the nondimensional water-film thickness expression and the film Weber number. For comparison purpose, tests were also conducted using the constant We(sub L) method for velocity scaling. The reference tests used a full-span, fiberglass, 91.4-cm-chord NACA 0012 model with velocities of 76 and 100 knot and MVD sizes of 150 and 195 microns. Scale-to-reference model size ratio was 1:2.6. All tests were made at 0deg AOA. Results will be presented for stagnation point freezing fractions of 0.3 and 0.5
Gendered patterns in candidates’ campaign fundraising : the case of Italy
The lack of financial resources is an often-cited hurdle for women pursuing political careers. However, empirical analysis of the dynamics of the private funding of women candidates and its potential implications for their political careers is still scant, particularly for countries outside the anglophone regions. This paper contributes to the scholarly debate by focusing on the gendered patterns in campaign fundraising in Italy, where radical changes to the party funding regime and multiple reforms to the electoral laws may have changed the structure of opportunity for fundraising by women candidates. We analyse patterns of private funding for men and women candidates in four national elections between 1996 and 2018. Our analysis, triangulated with semi-structured interviews with women candidates, shows that differences exist in fundraising patterns between male and female candidates in Italy. It reveals differences in the quality of candidates’ fundraising networks and confirms that political affiliation (to right-wing parties) and incumbency have an effect on the amount of donations received, thus granting women candidates greater access to private donations
The supersymmetric Ward identities on the lattice
Supersymmetric (SUSY) Ward identities are considered for the N=1 SU(2) SUSY
Yang Mills theory discretized on the lattice with Wilson fermions (gluinos).
They are used in order to compute non-perturbatively a subtracted gluino mass
and the mixing coefficient of the SUSY current. The computations were performed
at gauge coupling =2.3 and hopping parameter =0.1925, 0.194,
0.1955 using the two-step multi-bosonic dynamical-fermion algorithm. Our
results are consistent with a scenario where the Ward identities are satisfied
up to O(a) effects. The vanishing of the gluino mass occurs at a value of the
hopping parameter which is not fully consistent with the estimate based on the
chiral phase transition. This suggests that, although SUSY restoration appears
to occur close to the continuum limit of the lattice theory, the results are
still affected by significant systematic effects.Comment: 34 pages, 7 figures. Typo corrected, last sentence reformulated,
reference added. To appear in Eur. Phys. J.
On the use of R-PET strips for the reinforcement of cement mortars
We study the alkali resistance and the flexural response of a cement-based mortar reinforced through polyethylene terephthalate (PET) strips obtained through hand cutting of ordinary post-consumer bottles. On considering 1% fiber volume ratio and different strip geometries, we show that the analyzed reinforcing strips owe remarkable alkali resistance and are able to markedly improve the toughness of the base material. Comparisons are established with the outcomes of a recent study on a similar reinforcement technique of a cement-lime mortar
Comparison of dogs treated for primary immune-mediated hemolytic anemia in Tuscany, Italy and Texas, USA
This retrospective study compared clinical characteristics between dogs treated for IMHA by veterinary teaching hospitals in Tuscany, Italy and Texas, USA between 2010 and 2018
The three-loop beta function of SU(N) lattice gauge theories with Wilson fermions
We calculate the third coefficient of the lattice beta function associated
with the Wilson formulation for both gauge fields and fermions. This allows us
to evaluate the three-loop correction (linear in ) to the relation
between the lattice Lambda-parameter and the bare coupling , which is
important in order to verify asymptotic scaling predictions. Our calculation
also leads to the two-loop relation between the coupling renormalized in the
MSbar scheme and .
The original version of this paper contained a numerical error in one of the
diagrams, which has now been corrected. The calculations, as well as the layout
of the paper have remained identical, but there are some important changes in
the numerical results.Comment: One 14-page LaTeX file, one PostScript file containing 2 figures.
Corrected a numerical error in one of the diagrams. The calculations, as well
as the layout of the paper have remained unaffected, but there are some
important changes in the numerical result
Detecting significant features in modeling microRNA-target interactions
MicroRNAs (miRNAs) are small non-coding RNA molecules mediating the translational repression and degradation of target mRNAs in the cell. Mature miRNAs are used as a template by the RNA-induced silencing complex (RISC) to recognize the complementary mRNAs to be regulated. Up to 60% of human genes are putative targets of one or more miRNAs. Several prediction tools are available to suggest putative miRNA targets, however, only a small part of the interaction pairs has been validated by experimental approaches. The analysis of the expression profile of the RNA fraction immunoprecipitated (IP) with the RISC proteins is an established method to detect which genes are actually regulated by the RISC machinery. In fact, genes that result over-expressed in the IP sample with respect to the whole cell lysate RNA, are considered as involved in the RISC complex, then miRNA targets. Here, we aim to find the features useful to predict which genes are overexpressed in IP, i.e. miRNA targets, without actually performing the IP experiments. To this purpose, we compiled and analyzed a novel high throughput data set suitable to unravel the features involved in the miRNA regulatory activities. We analyzed IP samples obtained by the immunoprecipitation of two RISC proteins, AGO2 and GW182. The two proteins shows different behaviors, in terms of enriched genes and features characterizing the immunoprecipitated RNA fractio. Further analysis is needed to unravel the reason of such different behavior
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