Notas sobre <em>Tanacetum corymbosum s. l.</em> (Asteraceae)

Notas performativas sobre el delito verbal

oder del simulacro que no evoca el vacío presente sino la plenitud pasada; agotamiento de las creencias; identificación de la verdad con el desastre. He allí esbozados tres ejes del debate sobre el poder de la falsificación. El duelo entre Borges y Caillois es un capítulo de ese debate que ha sido objeto reciente de miradas críticas desencontradas. Jean-Pierre Bernès se inclinó por una minucios...

Los materiales digitales: notas sobre su conservación y depósito legal

On a pro � Lem of I . S � Hur

1 . Let n >= 3, and let Q,1 denote the class of polynomials f (x) of degree n satisfying the condition I f(x) 1 <_ 1 in the interval -1 <_ x _<_ +1 . Let Q~(xo) denote the subclass of Qn characterized by the further restriction f"(x o ) = 0 . A well-known theorem of A. Markoff1 states that I f' (x) I < n 2 for -1 _< x 5 +1 provided that f(x) e Qn ; here I f'(x) I = n2 holds if and only if x = ±...

extended_abstract - Bloco de notas

1. PROBLEM AND MOTIVATION In recent years, with the increasing use of technology, Artificial Intelligence has been gradually and successfully introduced into Education. However, major challenges remain. Among these, we are concerned how to represent the “knowledge” of intelligent authoring systems (IAS) and then how to use this knowledge efficiently, especially within the context of collaborati...

In vitro activity of Artemisia annua L (Asteraceae) extracts against Rhipicephalus (Boophilus) microplus Atividade in vitro de extratos de Artemisia annua L (Asteraceae) sobre Rhipicephalus (Boophilus) microplus

The activity of plant extracts on parasites may indicate groups of substances that are potentially useful for controlling Rhipicephalus (Boophilus) microplus. The aim of the present study was to investigate the in vitro action of Artemisia annua extracts on this tick. The concentrations of the sesquiterpene lactones artemisinin and deoxyartemisinin present in plant extracts were quantified via ...