Introduction Landsat Thematic Mapper ( TM ) imagery was used to analyze patterns of landscape diversity in the seasonal tropical forests of northeastern Guatemala. TM radiance and the radiance coefficient of variation (CV) were significant in discriminating land-cover types. Cluster analysis of TM4, TM5, and TM7 radiance produced six distinct types of landcover. Green leaf biomass from TM4 and ...

Schiff (1935, 1939) reported that bacteria-free filtrates from cultures of certain strains of C108tridium welchii destroyed the serological character of the blood-group A substance in commercial pepsin and human saliva. This finding has been confirmed bymany workers. Meyer (1945) observed that an enzyme obtained from Cl. welchii liberated free reducing sugars from a neutral mucopolysaccharide w...

Le suivi de la fréquence fondamentale est un problème important du traitement de la parole et de la musique, et le développement d’algorithmes robustes pour la détermination d’une ou plusieurs fréquences fondamentales est un sujet actif de recherches en traitement du signal acoustique (Gold et Morgan, 1999). La plupart des algorithmes d’extraction de la fréquence fondamentale commencent par con...

— We give a new proof for microlocal resolvent estimates for semi-classical Schrödinger operators, extending the known results to potentials with local singularity and to those depending on a parameter. These results are applied to the study of the stationary Schödinger equation with the approach of semi-classical measures. Under some weak regularity assumptions, we prove that the stationary Sc...

This article explores the ideas that went into George Boole’s development of an algebra for logic in his book The Laws of Thought. The many theories that have been proposed to explain the origins of his algebra have ignored his wife Mary Boole’s claim that he was deeply influenced by Indian logic. This paper investigates this claim and argues that Boole’s focus was more than a framework for pro...