On the generalized Nash problem for smooth germs and adjacencies of curve singularities

In this paper we explore the generalized Nash problem for arcs on a germ of smooth surface: given two prime divisors above its special point, to determine whether the arc space of one of them is included in the arc space of the other one. We prove that this problem is combinatorial and we explore its relation with several notions of adjacency of plane curve singularities.Comment: Final versio

Práctica de juegos tradicionales en el Comino Central Portugués.Transferencia al ámbito escolar

La riqueza de nuestro patrimonio lúdico se mide en gran medida por la magnitud y el impacto que los juegos populares y tradicionales han tenido en nuestra sociedad. En España, la práctica de algunos de estos juegos más importantes se relaciona con las aportaciones de los peregrinos que realizaban la ruta hasta Santiago de Compostela. Documentada la práctica profusa de juegos populares y tradicionales en los municipios por donde transcurre el Camino Portugués a su entrada en Galicia, este estudio buscó identificar y analizar las prácticas lúdicas tradicionales en los municipios por donde transcurre el último tramo del Camino Central Portugués (de Porto a Valença do Minho) y su transferencia al ámbito escolar. Se opta por una metodología cualitativa, empleando la entrevista personal semiestructurada como instrumento para la obtención de datos. Se registró una baja práctica de juegos tradicionales en estos municipios, donde el juego de Malha constituye la excepción más resaltable de este grupo de prácticas lúdicas, y donde se constató que la práctica de juegos populares y tradicionales en los centros educativos es escasa y, sobre todo, esporádica. La riqueza lúdica portuguesa debería ser tenida en mejor consideración por las autoridades, focalizando el trabajo de promoción y recuperación en las escuelas, lugares idóneos para este tipo de proyectos lúdico-sociales. Palabras clave: Camino de Santiago; Camino Central Portugués; Juegos populares y tradicionales; Prácticas lúdicas; Tradiciones.The wealth of our playful heritage measures up to a great extent for the magnitude and the impact that the popular and traditional games have had in our society. In Spain, the practice of some of these more important games relates to the contributions of the pilgrims who realized the route up to Santiago de Compostela. Documented the profuse practice of traditional and popular games in the municipalities where it passes the Portuguese Way to its entry in Galicia, this study sought to identify and analyze traditional playful practices in the municipalities where takes place the last stretch of the Central Portuguese Way (from Porto to Valença do Minho) and their transfer to the school environment. We opt for a qualitative methodology, using the personal semi-structured interview as a tool for obtaining data. There was registered a low practice of traditional games in these municipalities, where Malha game is the most remarkable group of recreational practice exception, and where it was found that the practice of popular and traditional games in schools is scarce and, above all, sporadic. The playful Portuguese wealth should be taken into better consideration by the authorities, focusing the work of promotion and revival in schools, ideal locations for this type of playful-social projectsCIEC - Centro de Investigação em Estudos da Criança, IE, UMinho (UI 317 da FCT), Portuga

On the order of the automorphism group of foliations

Let $\mathcal F$ be a holomorphic foliation with ample canonical bundle on a smooth projective surface $X$. We obtain an upper bound on the order of its automorphism group which depends only on $K_{\mathcal F}^2$ and $K_{\mathcal F}K_{X}$, provided this group is finite. Here, $K_{\mathcal F}$ and $K_{X}$ are the canonical bundles of $\mathcal F$ and $X$, respectively.Comment: 8 page

Extensional orogenic collapse captured by strike-slip tectonics:

The late Paleozoic collision between Gondwana and Laurussia resulted in the polyphase deformation and magmatism that characterizes the Iberian Massif of the Variscan orogen. In the Central Iberian Zone, initial con- tinental thickening (D1; folding and thrusting) was followed by extensional orogenic collapse (D2) responsible for the exhumation of high-grade rocks coeval to the emplacement of granitoids. This study presents a tectonometamorphic analysis of the Trancoso-Pinhel region (Central Iberian Zone) to ex- plain the processes in place during the transition froman extension-dominated state (D2) to a compression-dom- inated one (D3).Wereveal the existence of low-dipping D2 extensional structures later affected by several pulses of subhorizontal shortening, each of them typified by upright folds and strike-slip shearing (D3, D4 and D5, as identified by superimposition of structures). The D2 Pinhel extensional shear zone separates a low-grade domain from an underlying high-grade domain, and it contributed to the thermal reequilibration of the orogen by facil- itating heat advection from lower parts of the crust, crustal thinning, decompression melting, and magma intru- sion. Progressive lessening of the gravitational disequilibrium carried out by this D2 shear zone led to a switch from subhorizontal extension to compression and the eventual cessation and capture of the Pinhel shear zone by strike-slip tectonics during renewed crustal shortening. High-grade domains of the Pinhel shear zone were folded together with low-grade domains to define the current upright folded structure of the Trancoso-Pinhel re- gion, the D3 Tamames-Marofa-Sátão synform. Newdating of syn-orogenic granitoids (SHRIMP U\\Pb zircon dat- ing) intruding the Pinhel shear zone, together with the already published ages of early extensional fabrics constrain the functioning of this shear zone to ca. 331–311 Ma, with maximum tectonomagmatic activity at ca. 321–317 Ma. The capture and apparent cessation of movement of the Pinhel shear zone occurred at ca. 317– 311 Ma

Strike-slip shear zones of the Iberian Massif: Are they coeval?

Strike-slip shear zones of the Variscan orogen are used to derive the evolution of paleostrain and discuss the kinematics of the waning stages of the Gondwana-Laurussia collision during the amalgamation of Pangea. In the Iberian Massif, the recognition of three late Carboniferous deformation events related to strike-slip tectonics (D3, D4, D5) in the Trancoso-Pinhel region (Portugal) reveals that late orogenic transcurrent deformation was episodic and occurred in a short period of time (<15 m.y.). Early stages of strike-slip deformation included dextral and sinistral shear zones and orogen-parallel upright folds (D3; ca. 311 Ma). These structures followed the development of extensional shear zones (D2) during the tectonothermal reequilibration of the orogen. D3 structures were deflected and folded by the sinistral D4 Juzbado-Penalva do Castelo shear zone, dated as ca. 309–305 Ma by SHRIMP (sensitive high-resolution ion microprobe) U-Pb zircon dating of synkinematic granitoids. D3 and D4 structures were folded under east-west compression (D5) influenced by the strike-slip movement of the dextral Porto-Tomar shear zone. Variscan movement along the Porto-Tomar shear zone started ca. 304 Ma (onset of the Buçaco basin and syn-D5 granites), but ceased before ca. 295 Ma (age of the final closure of the Ibero-Armorican arc and crosscutting granites). The contrasting geometry, kinematics, and timing of these strike-slip shear zones are explained by deformation partitioning upon a rheologically inhomogeneous crust with structural and tectonothermal anisotropies generated during previous deformation. The convergence vector between Gondwana and Laurussia during D3–D5 remained the same, and was equivalent to the vector that explains the previous tectonic record (D2) in central and northwestern Iberia

Does electing women reduce corruption? A regression discontinuity approach

Previous studies uncovered a negative relationship between the proportion of women in public office and corruption. These findings have inspired anti-corruption programs around the world. It remains unclear, however, whether there is a causal link between the share of women in office and malfeasance. For instance, gender differences in political experience or access to corruption networks might explain this relationship. We leverage the gradual implementation of gender quotas in Spain to isolate the effects of female descriptive representation on public misconduct and adjudicate between alternative explanations. The analyses suggest a causal link between gender and malfeasance in office: the reform generated an exogenous increase in the share of women elected, which led to a decrease in corruption that was sustained over time. This finding enhances our understanding of the effect of public officials' characteristics on policy outcomes, and of the role of parity laws in promoting political change

A video object generation tool allowing friendly user interaction

In this paper we describe an interactive video object segmentation tool developed in the framework of the ACTS-AC098 MOMUSYS project. The Video Object Generator with User Environment (VOGUE) combines three different sets of automatic and semi-automatic-tool (spatial segmentation, object tracking and temporal segmentation) with general purpose tools for user interaction. The result is an integrated environment allowing the user-assisted segmentation of any sort of video sequences in a friendly and efficient manner.Peer ReviewedPostprint (published version