135,275 research outputs found
Observation of the Y(1(3)D(J)) bottomonium state through decays to pi(+)pi Y-(1S)
No full textBased on 122 X 10(6)Y(3S) events collected with the BABAR detector, we have observed the Y(1(3)D(J)) bottomonium state through the Y(3S) -> gamma gamma Y(1(3)D(J)) -> gamma gamma pi(+)pi Y-(1S) decay chain. The significance for the J = 2 member of the Y(1(3)D(J)) triplet is 5.8 standard deviations including systematic uncertainties. The mass of the J = 2 state is determined to be 10 164.5 +/- 0.8(stat) +/- 0.5(syst) MeV/c(2). We use the pi(+)pi(-) invariant mass distribution to confirm the consistency of the observed state with the orbital angular momentum assignment of the Y(1(3)D(J))
An experimental pilot study on controlled portal vein arterialization with an extracorporeal device in the swine model of partial liver resection and ischemia
No full textTo determine whether the physiologically oxygenated arterial blood reversed in the portal system by means of portal vein arterialization (PVA) through an extracorporeal device which we have called L.E.O2.NARDO (Liver Extracorporeal Oxygen. NARDO) is effective in treating swine with subtotal hepatectomy leading to acute liver failure (ALF)
Branching ratios and form factors in B0 s → D(∗)− s μ+νν decays
No full textAs a necessary step towards the test of lepton flavor universality provided by the observable R(D(∗) s ) = B(B0 s → D(∗)− s τ +ντ )/B(B0 s → D(∗)− s μ+νμ), the exlusive branching ratios and form factor of its denominator are going to be measured for the first time at an hadron collider
Primi dati sull'alimentazione di Aphanius fasciatus (Nardo, 1827) nello Stagnone di Marsala.
No full textExclusive Initial-State-Radiation Production of the D-bar D, D-bar D*, and D*-bar D* Systems
No full textPolymyalgia Rheumatica And Giant Cell Arteritis: Different Clinical Manifestations Of The Same Disease. A Great Mime In Geriatrics
No full textA symbolic handling of Sheffer polynomials
No full textWe revisit the theory of Sheffer sequences by means of the formalism introduced in Rota and Taylor (SIAM J Math Anal 25(2):694–711, 1994) and developed in Di Nardo and Senato (Umbral nature of the Poisson random variables. Algebraic combinatorics and computer science, pp 245–256, Springer Italia, Milan, 2001, European J Combin 27(3):394–413, 2006). The advantage of this approach is twofold. First, this new syntax allows us noteworthy computational simplification and conceptual clarification in several topics involving Sheffer sequences, most of the open questions proposed in Taylor (Comput Math Appl 41:1085–1098, 2001) finds answer. Second, most of the results presented can be easily implemented in a symbolic language. To get a general idea of the effectiveness of this symbolic approach, we provide a formula linking connection constants and Riordan arrays via generalized Bell polynomials, here defined. Moreover, this link allows us to smooth out many results involving Bell Polynomials and Lagrange inversion formula
Detection, characterization and sizing of hydrogen induced cracking in pressure vessels using phased array ultrasonic data processing
No full textPressure vessels operating in sour service conditions in refinery environments can be subject to the risk of H2S cracking resulting from the hydrogen entering into the material. This risk, which is related to the specific working conditions and to the quality of the steel used, shall be properly managed in order to maintain the highest safety at a cost-effective level. Nowadays the typical management strategy is based on a risk based inspection (RBI) evaluation to define the inspection plan used in conjunction with a fitness for service (FFS) approach in defining if the vessel, although presenting dangerous defects such as cracks, can still be considered “fit for purpose” for a given time window based on specific fracture mechanics analysis. These vessels are periodically subject to non-destructive evaluation, typically ultrasonic testing. Phased Array (PA) ultrasonic is the latest technology more and more used for this type of application. This paper presents the design and development of an optimized Phased Array ultrasonic inspection technique for the detection and sizing of hydrogen induced cracking (HIC) type flaws used as reference for comparison. Materials used, containing natural operational defects, were inspected in “as-service” conditions. Samples have then been inspected by means of a “full matrix capture” (FMC) acquisition process followed by “total focusing method” (TFM) data post processing. FCM-TFM data have been further post-processed and then used to create a 3D geometrical reconstruction of the volume inspected. Results obtained show the significant improvement that FMC/TFM has over traditional PA inspection techniques both in terms of sensitivity and resolution for this specific type of defect. Moreover, since the FMC allows for the complete time domain signal to be captured from every element of a linear array probe, the full set of data is available for post-processing. Finally, the possibility to reconstruct the geometry of the component from the scans, including the defects present in its volume, represents the ideal solution for a reliable data transferring process to the engineering function for the subsequent FFS analysi
Erratum: Exclusive initial-state-radiation production of the DD̄, D*D̄, and D*D̄* systems (Physical Review D - Particles, Fields, Gravitation and Cosmology (2009) 79 (092001))
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