While a two-dimensional (2D) metallic surface state in bismuth has been proposed, experimental 2D evidence of quantum transport, e.g., angular dependent Shubnikov-de Haas (SdH) oscillations is still lacking. Here, we report the angular-dependent magnetoresistance measurements in single-crystal Bi nanoribbons, and found that both the low-field weak antilocalization behavior and the high-field an...

This paper presents a generalization of the invariant subspace theorem of Helson and Lowdenslager along the lines of de Branges’ generalization of Beurling’s theorem.

The ISLM model has a long, controversial and convoluted history across time and economists. Although often attributed solely to Hicks, and sometimes called the Hicks-Hansen model after Hansen later institutionalised Hicks's formulation within the profession, it would be more accurately called the Harrod-Meade-HicksReddaway-Champernowne-Lange-Timlin-Modigliani-Hansen ISLM model to indicate the b...

We consider a class of fully nonlinear Fermi-Pasta-Ulam (FPU) lattices, consisting of a chain of particles coupled by fractional power nonlinearities of order α>1. This class of systems incorporates a classical Hertzian model describing acoustic wave propagation in chains of touching beads in the absence of precompression. We analyse the propagation of localized waves when α is close to unity. ...

Although important issues are still being investigated today, the bulk of the Fredholm theory of linear elliptic boundary value problems on bounded domains was completed during the 1960s. For pseudodifferential operators, the literature is more recent and begins with the work of Boutet de Monvel 1 ; see also 2 for a more complete exposition. While this was the result of the work and ideas of ma...

SANDRA MARIA BARBOSA DURÃES*, SIMONE DE ABREU NEVES SALLES**, VERONICA RODRIGUES BOGADO LEITE*** & MORGANA OHIRA GAZZETA**** *Adjunct Professor of Dermatology at Universidade Federal Fluminense, Rio de Janeiro, Brazil **Assistant Professor of Dermatology at Universidade Federal Fluminense, Rio de Janeiro, Brazil ***Graduate Student in Dermatology, Universidade Federal Fluminense, Rio de Janeiro...

Schwingel R, Duarte SBL, Oshima MM, Mesquita JVA, Reis F. Which is your diagnosis? Radiol Bras. 2015 Mar/Abr;48(2):XI–XIII. 1. MDs, Residents, Department of Radiology and Imaging Diagnosis, Faculdade de Ciências Médicas da Universidade Estadual de Campinas (FCM-Unicamp), Campinas, SP, Brazil. 2. PhD, Teacher Responsible for the Division of Neuroradiology, Professor at Faculdade de Ciências Médi...

We construct operators t(z) in the elliptic algebra Aq,p(ŝl(2)c). They close an exchange algebra when pm = qc+2 for m ∈ Z. In addition they commute when p = q2k for k integer non-zero, and they belong to the center of Aq,p(ŝl(2)c) when k is odd. The Poisson structures obtained for t(z) in these classical limits are identical to the q-deformed Virasoro Poisson algebra, characterizing the exchang...

a Universidade de São Paulo b Universidade de São Paulo Revista de Contabilidade e Organizações Renato Marques da Silvaa; Flavia Zoboli Dalmaciob

The Revista do Instituto de Medicina Tropical de São Paulo has the honor to present this special issue of the year 2015 that is entirely dedicated to celebrate the centennial anniversary of Prof. Carlos da Silva Lacaz, founder of the Instituto de Medicina Tropical. Simultaneously to the creation of the Institute, the Revista do Instituto de Medicina Tropical de São Paulo also began to operate i...