Progress in the dynamical parton distributions

The present status of the (JR) dynamical parton distribution functions is reported. Different theoretical improvements, including the determination of the strange sea input distribution, the treatment of correlated errors and the inclusion of alternative data sets, are discussed. Highlights in the ongoing developments as well as (very) preliminary results in the determination of the strong coupling constant are presented.Comment: 4 pages, 1 figure, Talk given at the XX International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2012

On the lattice of subgroups of a free group: complements and rank

A $\vee$-complement of a subgroup $H \leqslant \mathbb{F}_n$ is a subgroup $K \leqslant \mathbb{F}_n$ such that $H \vee K = \mathbb{F}_n$. If we also ask $K$ to have trivial intersection with $H$, then we say that $K$ is a $\oplus$-complement of $H$. The minimum possible rank of a $\vee$-complement (resp. $\oplus$-complement) of $H$ is called the $\vee$-corank (resp. $\oplus$-corank) of $H$. We use Stallings automata to study these notions and the relations between them. In particular, we characterize when complements exist, compute the $\vee$-corank, and provide language-theoretical descriptions of the sets of cyclic complements. Finally, we prove that the two notions of corank coincide on subgroups that admit cyclic complements of both kinds.Comment: 27 pages, 5 figure

Summary of the Structure Functions Working group at DIS 2012

A summary of the recent experimental, phenomenological and theoretical results presented in the Structure Functions working group at DIS2012 workshop.Comment: 12 pages, 9 figures, to be published in the Proceedings of the XX International Workshop on Deep Inelastic Scattering, University of Bonn, 26-30th March 201

Relative efficiency within a tax administration: The effects of result improvement

Neste trabalho, aborda-se a análise da administração tributária espanhola mediante a avaliação da eficiência relativa de cada um dos escritórios territoriais que a integram, empregando, para isso, a análise envolvente de dados de forma bietápica, com uma orientação output. Neste estudo, analisaram-se 47 escritórios territoriais considerando três inputs: 1) os gastos correntes em bens e serviços; 2) o número de declarações gerenciadas pelos dois principais impostos diretos e 3) o número de efetivos que presta seus serviços. Como output, os Ingressos por Atos de Liquidação. A análise demonstra que uma atuação eficiente dos escritórios territoriais poderia ter aumentado em 21,6% os resultados da gestão dessa Administração.This paper analyses the Spanish tax administration, evaluating the relative efficiency of each of the regional offices that are its constituent parts via output-oriented two-stage data envelopment analysis. In the study, a total of 47 regional offices were analysed, considering three inputs: 1) current expenditure in goods and services; 2) number of tax returns processed in terms of the two main direct taxes; and, 3) personnel numbers. Revenue resulting from tax assessments was considered as output. The analysis shows that the efficient action of regional offices might have increased by 21.6% the results of the management of this administration.A través de este trabajo se ha abordado el análisis de la administración tributaria española mediante la evaluación de la eficiencia relativa de cada una de las oficinas territoriales que la integran, empleando para ello el análisis envolvente de datos de forma bietápica, con una orientación output. En el estudio se han analizado 47 oficinas territoriales, considerando tres inputs: 1) los gastos corrientes en bienes y servicios; 2) el número de declaraciones gestionadas por los dos principales impuestos directos; y 3) el número de efectivos que presta sus servicios. Como output los Ingresos por Actos de Liquidación. El análisis pone de manifiesto que una actuación eficiente de las oficinas territoriales podría haber incrementado un 21.6% los resultados de la gestión de esta Administración

El concepto de Historia en España (1750-1850)

El concepto de historia durante el periodo 1750 a 1850 en España se refiere la mayoría de las veces a la narración verídica de acontecimientos del pasado. Pero, junto a esa significación dominante, se observa también una lenta, pero constante y cada vez mThis article studies changes and continuities in the meaning of the concept constitución in the Río de la Plata along a period of important political transformations. In its particular semantic modulations, the concept shows the conflictive process of re

Telemedicine in the Management of Parkinson’s Disease: Achievements, Challenges, and Future Perspectives

As the global population grows, there is an increasing demand for neurologic consultation that prompts new ways to reach more patients. Telemedicine can provide an accessible, cost-effective, and high-quality healthcare services. In this article, we highlight recent developments, achievements, and challenges regarding outcomes, clinical care, tele-education, teletreatment, teleresearch, and cybersecurity for telemedicine applied to Parkinson´s disease (PD) and other neurological conditions