Equilibrium logic is a system of nonmonotonic reasoning that generalises answer set semantics for logic program~ to a syntactically broader class of theories. The paper discusses the problem of abduction for equilibrium logic, making use of tableaux systems for equilibrium entailment presented in (Pearce, de Guzm(m, Valverde 2000b). An algorithm for generating potential abductive explanations i...

A long-standing debate in plant ecology is how plant diversity – including species richness, functional, and phylogenetic diversity – determines primary productivity aboveground and belowground (Tilman et al., 1997; Cadotte et al., 2009). A leading mechanism linking diversity and productivity posits that diverse assemblages of plants are more likely to complement each other in resource acquirin...

—Ostional Beach, Costa Rica, supports a large mass nesting (arribada) aggregation of Olive Ridley Sea Turtles (Lepidochelys olivacea). A large number of egg clutches is lost to egg harvest and to nest destruction by nesting females after every arribada. Accordingly, the purpose of our study was to generate estimates of the net number of clutches left incubating from clutch densities with the us...

¿Hubo una operación política para iniciar en los años 1975 a 1980 no solo la transición democrática sino también ecológica? En Fernando González Bernáldez fue llamado, sus 43 años, protagonizar dos momentos clave, convocado por separado sendos pioneros de conservación, José Antonio Valverde y Félix Rodríguez Fuente. Ambos coincidieron tirar él cuando buscaban persona sobresaliente, capaz afront...

La iglesia de Santa Emerenciana Puebla Valverde (Teruel), construida en época medieval, se renovó los siglos XVI y XVII. En el presente trabajo analizamos dicha reforma aludiendo a las visitas pastorales mandadas desde la Sede Metropolitana Zaragoza que nos permiten conocer edificio antiguo y, continuación, indagamos fases sucesivas obra. Para tal fin, ampliamos informaciones ya publicadas con ...

In recent years, pharmaceuticals have been detected in a wide variety of environmental samples including sewage effluent, surface waters, groundwater and drinking water at a concentration from ng/l to μg/l. They are considered as pseudo-persistent pollutants, which continually enter the environment at very low concentrations (Valverde, García, Galera et al., 2006). Among different groups of pha...