63 research outputs found
Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at TeV
Inclusive transverse momentum spectra of primary charged particles in Pb-Pb
collisions at = 2.76 TeV have been measured by the ALICE
Collaboration at the LHC. The data are presented for central and peripheral
collisions, corresponding to 0-5% and 70-80% of the hadronic Pb-Pb cross
section. The measured charged particle spectra in and GeV/ are compared to the expectation in pp collisions at the same
, scaled by the number of underlying nucleon-nucleon
collisions. The comparison is expressed in terms of the nuclear modification
factor . The result indicates only weak medium effects ( 0.7) in peripheral collisions. In central collisions,
reaches a minimum of about 0.14 at -7GeV/ and increases
significantly at larger . The measured suppression of high- particles is stronger than that observed at lower collision energies,
indicating that a very dense medium is formed in central Pb-Pb collisions at
the LHC.Comment: 15 pages, 5 captioned figures, 3 tables, authors from page 10,
published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/98
Two-pion Bose-Einstein correlations in central Pb-Pb collisions at = 2.76 TeV
The first measurement of two-pion Bose-Einstein correlations in central Pb-Pb
collisions at TeV at the Large Hadron Collider is
presented. We observe a growing trend with energy now not only for the
longitudinal and the outward but also for the sideward pion source radius. The
pion homogeneity volume and the decoupling time are significantly larger than
those measured at RHIC.Comment: 17 pages, 5 captioned figures, 1 table, authors from page 12,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/388
Seismic Performance of Historical Masonry Structures Through Pushover and Nonlinear Dynamic Analyses
Earthquakes are the main cause of damage for ancient masonry buildings. In order to reduce their vulnerability with compatible and light interventions, it is necessary to have accurate models for the seismic analysis, able to simulate the nonlinear behaviour of masonry, and well defined Performance-Based Assessment (PBA) procedure, aimed to guarantee acceptable levels of risk for the use of the building, the safety of occupants and the conservation of the monument itself. Displacement-based approach is the more appropriate for this type of structures, which cracks even for low intensity earthquakes and can survive to severe ones only if they have a sufficient displacement capacity. Among the wide variety of historical masonry structures, buildings characterized by a box-type behavior are here considered, which can be modeled through the equivalent frame model, considering the assembling of nonlinear piers and spandrels. Thus, the main object of the paper is to establish a strict equivalence between the use of static pushover and incremental dynamic analyses for the PBA. Pros and cons of the two methods are discussed, as well as some critical issues related to their application. A multiscale approach is proposed for the definition of the performance levels, which considers the seismic response at different scales: local damage in single elements, performance of single walls and horizontal diaphragms and global behavior. An original contribution is the use of Proper Orthogonal Decomposition (POD) technique for the correct interpretation of numerical and experimental dynamic results
Associação entre caracterĂsticas pessoais, organização do trabalho e presença de dor em funcionĂĄrios de uma indĂșstria moveleira
The historie of George Castriot, surnamed Scanderbeg, King of Albanie Containing his famous actes, his noble deedes of armes, and memorable victories against the Turkes, for the faith of Christ. Comprised in twelue bookes: by Iaques de Lauardin, Lord of Plessis Bourrot, a nobleman of France. Newly translated out of French into English by Z.I. Gentleman.
Enhancement of fire retardancy properties of glass fibreâreinforced polyesters composites
Orations of Arsanes agaynst Philip the trecherous kyng of Macedone: : of the Embassadors of Venice against the prince that vnder crafty league with Scanderbeg, layed snares for Christendome : and of Scanderbeg prayeng ayde of Christian Princes agaynst periurous murderyng Mahumet and agaynst the old false Christian Duke Mahumetes confederate : with a notable example of Gods vengeance vppon a faithlesse Kyng, Quene, and her children.
Nuclear explosions as neutron sources : talk given at Plowshare Symposium, San Francisco, California, May 13-15, 1959 /
Data are presented from some experiments which have been performed at Los Alamos which uniquely required the intense neutron sources provided by nuclear explosions. These studies concerned the following subjects: 1) Symmetry of fission of U235 at individual resonance levels in the epithermal neutron region. 2) Synthesis of new elements. 3) Tracer studies of fallout from the upper stratosphere.Accession No.: 56376."Contract W-7405-ENG.36 with the U.S. Atomic Energy Commission.""Report written: May 1959 ; Report distributed: March 18, 1960.""LAMS-2391 ; Nuclear Explosions-Peaceful Applications ; (TID-4500, 15th Ed.)."Data are presented from some experiments which have been performed at Los Alamos which uniquely required the intense neutron sources provided by nuclear explosions. These studies concerned the following subjects: 1) Symmetry of fission of U235 at individual resonance levels in the epithermal neutron region. 2) Synthesis of new elements. 3) Tracer studies of fallout from the upper stratosphere.Mode of access: Internet
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