A robust method for the localization of frames within document images is presented. It aims at detecting regions delimited by closed polygonal lines or edges in complex color, gray-level or binary images. In order to reduce computation time and to return only the desired regions, the method exploits information about the frames to be detected such as shape, skew or size, possibly supplied by th...

A CPS translation is a syntactic translation of programs, which is useful for describing their operational behavior. By iterating the standard call-by-value CPS translation, Danvy and Filinski discovered the CPS hierarchy and proposed a family of control operators, shift and reset, that make it possible to capture successive delimited continuations in a CPS hierarchy. Although shift and reset h...

There has long been a perception among fuzzy set theorists that the negation based on the operation a 7→ 1 − a is the “correct” negation. It is easy to see why this is so. In the model of fuzzy sets based on the unit interval [0, 1], the classical complement of a subset is a destructive operation. For example, if A0 is a fuzzy subset of a crisp set A , then in the classical complement of A0 eve...

Reduction in channel capacity can trigger an increase in flood hazard over time. It represents a geomorphic driver that competes against its hydrologic counterpart where streamflow decreases. We show that this situation arose in the Guadalquivir River (Southern Spain) after impoundment. We identify the physical parameters that raised flood hazard in the period 1997–2013 with respect to past yea...

We solve the Poisson disorder problem when the delay is penalized exponentially. Our objective is to detect as quickly as possible the unobservable time of the change (or disorder) in the intensity of a Poisson process. The disorder time delimits two different regimes in which one employs distinct strategies (e.g., investment, advertising, manufacturing). We seek a stopping rule that minimizes ...

Given a digital straight line D of known characteristics (a, b, c), and given two arbitrary discrete points A(xa, ya) and B(xb, yb) of it, we are interested in computing the characteristics of the digital straight segment (DSS) of D delimited by the endpoints A and B. Our method is based entirely on the remainder subsequence S = {ax − c mod b; xa ≤ x ≤ xb}. We show that minimum and maximum rema...

Abstract After a decade of crisis management, the democratic implications emergency modes governance in European Union (EU) are under spotlight. The prevailing analysis is critical. Scholars point to an emergent, distinctly trend transnational exploitation where elite appeals exceptional pressures serve asymmetric power and influence, overriding norms potentially fuelling Eurosceptic backlash. ...

A new design methodology for a model reference adaptive controller (MRAC) is presented, which is applied to a brushed direct current (DC) motor with pendular load, whose exact model is unknown. This controller is designed for the trajectory tracking control problem, and the respective convergence analysis is presented. In order to avoid singularities in the controller equations, projectors are ...

Pairs of discrete event time series are characterised by their asynchronous nature, often hampering direct application of otherwise common analysis methods. For correct application of scatter plots, pairs of discrete event time series first have to be pre-processed and merged into a new synthetic time series of so-called coobservations. While standard scatter plots suggest analysis of global st...

The core concept of phylogenetic systematics is the use of derived or apomorphic characters to reconstruct common ancestry relationships and the grouping of taxa based on common ancestry. This concept, first formalized by Hennig (1950, 1966), has been slowly, and not so quietly, changing the nature of systematics. Why should we be interested in this approach? What about phylogenetic systematics...