12,495 research outputs found
Analisi archeometriche su alcuni reperti ceramici dallo scavo di Jure Vetere (S. Giovanni in Fiore – CS). Contributo allo studio delle modalità di produzione e circolazione di manufatti
No full textIn continuità con quanto elaborato durante lo studio dei reperti ceramici rinvenuti nello scavo di Jure Vetere (S. Giovanni in Fiore, CS) , si è proceduto ad ampliare l’analisi su alcune classi ceramiche attraverso l’indagine archeometrica sugli impasti, nella consapevolezza che un appropriato confronto tra i dati provenienti dalle analisi sulle materie prime costituenti con quelli ricavati dalle analisi crono-tipologiche dei manufatti, possa delineare un quadro informativo quanto più completo possibile sulla provenienza delle materie prime, sui luoghi di produzione, sulla circolazione e distribuzione infine dei prodotti finiti
Combination of KLOE σ (e + e − → π+π−) measurements and determination of aμπ+ π− in the energy range 0.10 < s < 0.95 GeV2
No full textThe three precision measurements of the cross section σ(e+e− → π+π−) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for σ(e+e− → π+π−). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of aμπ+π−=(489.8±1.7stat±4.8sys)×10−10. Data vectors and covariance matrices are available at http://www.lnf.infn.it/kloe/ppg/ppg_2017/ppg_2017.html. © 2018, The Author(s)
Precision measurement of the η → π +π −π 0Dalitz plot distribution with the KLOE detector
No full textAbstract: Using 1.6 fb−1of e+e−→ φ → ηγ data collected with the KLOE detector at DAΦNE, the Dalitz plot distribution for the η → π+π−π0decay is studied with the world’s largest sample of ∼ 4.7 · 106events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables X and Y. The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a gX2Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements. © 2016, The Author(s)
Measurement of the charge asymmetry for the KS → πeν decay and test of CPT symmetry with the KLOE detector
No full textUsing 1.63 fb−1 of integrated luminosity collected by the KLOE experiment about 7 × 104KS → π±e∓ν decays have been reconstructed. The measured value of the charge asymmetry for this decay is AS = (−4.9 ± 5.7stat ± 2.6syst) × 10−3, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives AS = (−3.8 ± 5.0stat ± 2.6syst) × 10−3 and, together with the asymmetry of the KL semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance. © 2018, The Author(s)
The Life and Works of Joachim of Fiore - An Overview
No full textJoachim of Fiore (c.1135-1202) remains one of the most fascinating and enigmatic figures of medieval Christianity. He may well be called the most influential apocalyptic thinker after the author of the Book of Revelation. In his own time, Joachim was an influential advisor to the mighty and powerful, widely respected for his prophetic exegesis and decoding of the apocalypse. This article aims to present his life and his work
Monitoring of hadrontherapy treatments by means of charged particle detection
No full textThe interaction of the incoming beam radiation with the patient body in hadrontherapy treatments produces secondary charged and neutral particles, whose detection can be used for monitoring purposes and to perform an on-line check of beam particle range. In the context of ion-therapy with active scanning, charged particles are potentially attractive since they can be easily tracked with a high efficiency, in presence of a relatively low background contamination. In order to verify the possibility of exploiting this approach for in-beam monitoring in ion-therapy, and to guide the design of specific detectors, both simulations and experimental tests are being performed with ion beams impinging on simple homogeneous tissue-like targets (PMMA). From these studies, a resolution of the order of few millimeters on the single track has been proven to be sufficient to exploit charged particle tracking for monitoring purposes, preserving the precision achievable on longitudinal shape. The results obtained so far show that the measurement of charged particles can be successfully implemented in a technology capable of monitoring both the dose profile and the position of the Bragg peak inside the target and finally lead to the design of a novel profile detector. Crucial aspects to be considered are the detector positioning, to be optimized in order to maximize the available statistics, and the capability of accounting for the multiple scattering interactions undergone by the charged fragments along their exit path from the patient body. The experimental results collected up to now are also valuable for the validation of Monte Carlo simulation software tools and their implementation in Treatment Planning Software packages. © 2016 Muraro, Battistoni, Collamati, De Lucia, Faccini, Ferroni, Fiore, Frallicciardi, Marafini, Mattei, Morganti, Paramatti, Piersanti, Pinci, Rucinski, Russomando, Sarti, Sciubba, Solfaroli-Camillocci, Toppi, Traini, Voena and Patera
Il monastero florense da Jure Vetere a S. Giovanni in Fiore: le vicende storiche
No full textLa scoperta della prima fondazione monastica di Gioacchino da Fiore avvenuta durante le recenti indagini archeologiche nel sito di Jure Vetere, nelle vicinanze di S. Giovanni in Fiore (CS), costituisce la prima traccia materiale di una vicenda insediativa ed architettonica ricca ed articolata, in termini di strutture, spazi, consistenza patrimoniale, rapporti istituzionali – sia religiosi che civili – e relazioni umane. In questo contributo si vogliono seguire le tracce lasciate dalla documentazione scritta relativa all’insediamento monastico, fortunatamente consistente nel caso in questione, attraverso la lettura incrociata delle diverse categorie di fonti a disposizione, funzionale alla ricostruzione della fisionomia religiosa, storico-istituzionale ed economica dell’insediamento florense, dal protomonastero di Jure Vetere all’abbazia di S. Giovanni in Fiore
Tommaso Fiore e Benedetto Croce attraverso l'epistolario inedito
No full textL'antifascismo e il liberalsocialismo, attraverso l'epistolario inedito di Tommaso Fiore e Benedetto Croc
A ``slingshot'' laser-driven acceleration mechanism of plasma electrons
No full textWe briefly report on the recently proposed [G. Fiore, R. Fedele, U. de Angelis, Phys. Plasmas 21 (2014), 113105], [G. Fiore, S. De Nicola, arXiv:1509.04656], electron acceleration mechanism named ``slingshot effect": under suitable conditions the impact of an ultra-short and ultra-intense laser pulse against the surface of a low-density plasma is expected to cause the expulsion of a bunch of superficial electrons with high energy in the direction opposite to that of the pulse propagation; this is due to the interplay of the huge ponderomotive force, huge longitudinal field arising from charge separation, and the finite size of the laser spot
Radiation performance of new semiconductor power devices for the LHC experiment upgrades
No full textGaN and SiC power devices were extensively tested under different types of radiation, in the framework of the APOLLO R&D collaboration, aiming to use these new technologies for designing power supplies for the future LHC experiments upgrades. SiC power MOSFETs were irradiated with -rays, neutrons, and heavy ions (Iodine, Bromine) at different energies (20MeV - 550MeV). They showed very good performances in terms of Total Ionizing Dose (TID) sensitivity, but exhibited a quite poor Safe Operating Area (SOA) with respect to Single Event Effects (SEEs). Enhancement-mode GaN transistors manufactured by EPC, with blocking voltage ranging from 40V to 200V, were irradiated with -rays, heavy ions (Iodine, Bromine), and low energy protons. They showed a very good SOA toward SEE. After the irradiation with 3-MeV protons at the highest fluence (4∙1014 p/cm2), the devices exhibited an increase of up to one order of magnitude in gate leakage, almost 1 V of threshold voltage reduction, degradation of the subthreshold slope, and drop in transconductance. The reduction in threshold is in contrast with the increase normally observed in GaN devices irradiated with protons, and is likely due to radiation effects in the layers introduced to engineer the positive threshold voltage. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence
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