University of Turin

About: University of Turin is a education organization based out in Turin, Piemonte, Italy. It is known for research contribution in the topics: Population & Cancer. The organization has 29607 authors who have published 77952 publications receiving 2480900 citations. The organization is also known as: Universita degli Studi di Torino & Università degli Studi di Torino.

Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at root s(NN)=2.76 TeV

Abstract: We report on the first measurement of the triangular nu(3), quadrangular nu(4), and pentagonal nu(5) charged particle flow in Pb-Pb collisions at root s(NN) = 2.76 TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow nu(2) and nu(3) have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. We show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.

Induction of epithelial tubules by growth factor HGF depends on the STAT pathway

Abstract: Hepatocyte growth factor (HGF) induces a three-phase response leading to the formation of branched tubular structures in epithelial cells1,2. The HGF receptor tyrosine kinase works through a Src homology (SH2) docking site that can activate several signalling pathways3. The first phase of the response (scattering), which results from cytoskeletal reorganization, loss of intercellular junctions and cell migration4, is dependent on phosphatidylinositol-3-OH kinase and Rac activation5,6. The second phase (growth) requires stimulation of the Ras–MAP kinase cascade7. Here we show that the third phase (tubulogenesis) is dependent on the STAT pathway. HGF stimulates recruitment of Stat-3 to the receptor, tyrosine phosphorylation, nuclear translocation and binding to the specific promoter element SIE. Electroporation of a tyrosine-phosphorylated peptide, which interferes with both the association of STAT to the receptor and STAT dimerization, inhibits tubule formation in vitro without affecting either HGF-induced ‘scattering’ or growth. The same result is obtained using a specific ‘decoy’ oligonucleotide that prevents STAT from binding to DNA and affecting the expression of genes involved in cell-cycle regulation (c-fos and waf-1). Activation of signal transducers that directly control transcription is therefore required for morphogenesis.

User authentication through keystroke dynamics

Abstract: Unlike other access control systems based on biometric features, keystroke analysis has not led to techniques providing an acceptable level of accuracy. The reason is probably the intrinsic variability of typing dynamics, versus other---very stable---biometric characteristics, such as face or fingerprint patterns. In this paper we present an original measure for keystroke dynamics that limits the instability of this biometric feature. We have tested our approach on 154 individuals, achieving a False Alarm Rate of about 4p and an Impostor Pass Rate of less than 0.01p. This performance is reached using the same sampling text for all the individuals, allowing typing errors, without any specific tailoring of the authentication system with respect to the available set of typing samples and users, and collecting the samples over a 28.8-Kbaud remote modem connection.