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The asymptotic risk in a signal parameter estimation problem - Information Theory, IEEE Transactions on
No full textLatin American Regionalism in a Multipolar World
No full textAbstract The landscape of Latin American regionalism has experienced profound transformations in a relatively short period of time. Regional organizations have proliferated; the open regionalism of the 1990s is in decay and new political organizations often referred to as belonging to a new wave of 'post-hegemonic regionalism' have moved to center stage, just to be shortly after overtaken in the attention of observes by new trade-oriented organizations such as the Pacific Alliance. These developments have been puzzling scholars and policy makers, who for their most part have tended to converge on the view that a fragmented regional configuration with diverging or even incompatible models of regional integration is on the rise. This article challenges this interpretation by arguing that many of the trends we observe can be rather seen as the result of a practical adaptation of regional states foreign policy strategies to the emergence of a multipolar political economy in the international system. One important consequence of this process of adaptation, I argue, is a major 'decoupling' of the economic function of regionalism from its other dimensions, a process that I show is facilitating the emergence of a regional architecture characterized by a more fine division of labor among organizations
A comparative Raman study between YbVO
No full textAbstract. An orbital ordering effect is observed in YbVO 3 around 170 K while the crystal structure is orthorhombic (space group pnma). A monoclinic transition has been reported below T N = 104 K, while according to recent specific heat measurements, it occurs at 170 K. The crystal structure of YVO 3 at 300 K is also orthorhombic. It becomes monoclinic at T c = 200 K and back orthorhombic at T = 77 K. Spins order into the C-type antiferromagnetic structure below T N1 = 116 K and the order changes into the G-type antiferromagnetic structure below T N2 = 77 K. Controversial interpretations of YVO 3 Raman active excitations have been reported. For instance the 489 and 679 cm -1 excitations have been assigned either to phonons or orbitons in two recent studies. In this communication we present a micro-Raman study of YbVO 3 and YVO 3 Raman active excitations as a function of temperature in order to trace the multiple phase transitions. Also by comparing the two single crystals spectra and previous studies in rare-earth manganites, high energy Raman active excitations are tentatively assigned
Features modeling with an alpha-stable distribution: application to pattern recognition based on continuous belief functions
No full textArt. 1.1475/ringraziamenti
No full textAbstract. -In the past decade, the treatment of chronic Hepatitis B (CHB) has been revolutionized by the increased availability of effective antiviral agents. However, there is an alarming of the increasing rates of viral resistance and suboptimal response in CHB patients with single drug therapy. Recently, the strategy of combination therapy for CHB has been proposed and concerned by clinicians. In this review, using PubMed and web of science as main searching tools, we evaluated various latest research reports on combination therapy for CHB, and made a summary of the progress of combination antiviral therapy and outline areas that need to be addressed in the future
Value computation and modulation: a neuroeconomic theory of self-control as constrained optimization *
No full textAbstract We develop a theory of self-control based on the evidence reported in Hare
Models of motor-assisted transport of intracellular particles
No full textABSTRACT One-dimensional models are presented for the macroscopic intracellular transport of vesicles and organelles by molecular motors on a network of aligned intracellular filaments. A motor-coated vesicle or organelle is described as a diffusing particle binding intermittently to filaments, when it is transported at the motor velocity. Two models are treated in detail: 1) a unidirectional model, where only one kind of motor is operative and all filaments have the same polarity; and 2) a bidirectional model, in which filaments of both polarities exist (for example, a randomly polarized actin network for myosin motors) and/or particles have plus-end and minus-end motors operating on unipolar filaments (kinesin and dynein on microtubules). The unidirectional model provides net particle transport in the absence of a concentration gradient. A symmetric bidirectional model, with equal mixtures of filament polarities or plus-end and minus-end motors of the same characteristics, provides rapid transport down a concentration gradient and enhanced dispersion of particles from a point source by motor-assisted diffusion. Both models are studied in detail as a function of the diffusion constant and motor velocity of bound particles, and their rates of binding to and detachment from filaments. These models can form the basis of more realistic models for particle transport in axons, melanophores, and the dendritic arms of melanocytes, in which networks of actin filaments and microtubules coexist and motors for both types of filament are implicated