326 research outputs found

    Wavelet transform modulus maxima based fractal correlation analysis

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    The wavelet transform modulus maxima (WTMM) used in the singularity analysis of one fractal function is extended to study the fractal correlation of two multifractal functions. The technique is developed in the framework of joint partition function analysis (JPFA) proposed by Meneveau et al. [1] and is shown to be equally effective. In addition, we show that another leading approach developed for the same purpose, namely, relative multifractal analysis, can be considered as a special case of JPFA at a particular parameter setting.Comment: 18 pgs, 5 fig

    Self Organized Scale-Free Networks from Merging and Regeneration

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    We consider the self organizing process of merging and regeneration of vertices in complex networks and demonstrate that a scale-free degree distribution emerges in a steady state of such a dynamics. The merging of neighbor vertices in a network may be viewed as an optimization of efficiency by minimizing redundancy. It is also a mechanism to shorten the distance and thus decrease signaling times between vertices in a complex network. Thus the merging process will in particular be relevant for networks where these issues related to global signaling are of concern

    On kaonic hydrogen. Quantum field theoretic and relativistic covariant approach

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    We study kaonic hydrogen, the bound K^-p state A_(Kp). Within a quantum field theoretic and relativistic covariant approach we derive the energy level displacement of the ground state of kaonic hydrogen in terms of the amplitude of K^-p scattering for arbitrary relative momenta. The amplitude of low-energy K^-p scattering near threshold is defined by the contributions of three resonances Lambda(1405), Lambda(1800) and Sigma^0(1750) and a smooth elastic background. The amplitudes of inelastic channels of low-energy K^-p scattering fit experimental data on near threshold behaviour of the cross sections and the experimental data by the DEAR Collaboration. We use the soft-pion technique (leading order in Chiral Perturbation Theory) for the calculation of the partial width of the radiative decay of pionic hydrogen A_(pi p) -> n + gamma and the Panofsky ratio. The theoretical prediction for the Panofsky ratio agrees well with experimental data. We apply the soft-kaon technique (leading order in Chiral Perturbation Theory) to the calculation of the partial widths of radiative decays of kaonic hydrogen A_(Kp) -> Lambda^0 + gamma and A_(Kp) -> Sigma^0 + gamma. We show that the contribution of these decays to the width of the energy level of the ground state of kaonic hydrogen is less than 1%.Comment: 33 pages, 1 figure, latex, References are adde

    Equilibrium configurations of two charged masses in General Relativity

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    An asymptotically flat static solution of Einstein-Maxwell equations which describes the field of two non-extreme Reissner - Nordstr\"om sources in equilibrium is presented. It is expressed in terms of physical parameters of the sources (their masses, charges and separating distance). Very simple analytical forms were found for the solution as well as for the equilibrium condition which guarantees the absence of any struts on the symmetry axis. This condition shows that the equilibrium is not possible for two black holes or for two naked singularities. However, in the case when one of the sources is a black hole and another one is a naked singularity, the equilibrium is possible at some distance separating the sources. It is interesting that for appropriately chosen parameters even a Schwarzschild black hole together with a naked singularity can be "suspended" freely in the superposition of their fields.Comment: 4 pages; accepted for publication in Phys. Rev.

    Heart failure and diabetes: metabolic alterations and therapeutic interventions: a state-of-the-art review from the Translational Research Committee of the Heart Failure Association-European Society of Cardiology.

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    Altres ajuts: C.M. is supported by the Deutsche Forschungsgemeinschaft (DFG; SFB 894, TRR-219, and Ma 2528/7-1), the German Federal Ministry of Education and Science (BMBF; 01EO1504) and the Corona foundation. J.B. is supported by the DFG (SFB 1118) and the DZHK (German Centre for Cardiovascular Research) and by the BMBF. M.L. is supported by the DFG (SFB TRR 219M-03). R.B. is supported by the Netherlands Heart Foundation (CVON DOSIS 2014-40, CVON SHE-PREDICTS-HF 2017-21, and CVON RED-CVD 2017-11); and the Innovational Research Incentives Scheme program of the Netherlands Organization for Scientific Research (NWO VIDI, grant 917.13.350). N.M. is supported by the DFG (SFB TRR 219M-03, M-05). H.T. is supported by grants from the National Institutes of Health of the US Public Health Service (HL-RO1 061483 and HL-RO1 073162). A.B.G. was supported by grants from the Ministerio de Educación y Ciencia , Fundació La MARATÓ de TV3 (201502, 201516), CIBER Cardiovascular (CB16/11/00403), and AdvanceCat 2014-2020. H.B. is supported by the DFG (Bu2126/3-1). A.D.C. was supported by 'FIL' funds for research from University of Parma. A.G. was supported by grants from the European Union Commission's FP7 programme (HOMAGE and FIBROTARGETS) and ERA-CVD Joint Transnational Call 2016 LYMIT-DIS. G.R. acknowledges recent funding from The Cunningham Trust, MRC (MR/K012924/1) and the Diabetes UK RW and JM Collins studentship. S.H. received funding from the European Union Commission's Seventh Framework programme (2007-2013) under grant agreement N° 305507 (HOMAGE), N° 602904 (FIBROTARGETS) and N° 602156 (HECATOS). S.H. acknowledges the support from the Netherlands Cardiovascular Research Initiative: an initiative with support of the Dutch Heart Foundation, CVON-ARENA-PRIME, CVON-EARLY HFPEF, and SHE-PREDICTS. This research is co-financed as a PPP-allowance Research and Innovation by the Ministry of Economic Affairs within Top Sector Life sciences & Health

    The ALICE Transition Radiation Detector: Construction, operation, and performance

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    The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD also contributes significantly to the track reconstruction and calibration in the central barrel of ALICE. In this paper the design, construction, operation, and performance of this detector are discussed. A pion rejection factor of up to 410 is achieved at a momentum of 1 GeV/c in p-Pb collisions and the resolution at high transverse momentum improves by about 40% when including the TRD information in track reconstruction. The triggering capability is demonstrated both for jet, light nuclei, and electron selection. (c) 2017 CERN for the benefit of the Authors. Published by Elsevier B.V
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