9,622 research outputs found
Inconsistency and non-additive Choquet integration in the Analytic Hierarchy Process
We propose to extend the aggregation scheme of Saaty’s AHP, from the stan- dard weighted averaging to the more general Choquet integration. In our model, a measure of inconsistency between criteria is derived from the main pairwise comparison matrix and it is used to construct a non-additive capacity, whose associated Choquet integral reduces to the standard weighted mean in the con- sistency case. In the general inconsistency case, however, the new aggregation scheme based on Choquet integration tends to attenuate (resp. emphasize) the priority values of the criteria with higher (resp. lower) average inconsistency with the remaining criteria.Aggregation Functions, Multiple Criteria Analysis, AHP, Inconsintency, non-additive measures, Choquet integral, and Shapley values.
Un nouveau cas de dimorphisme sexuel chez les Schendylidae: Schendylops virgingordae (Crabill, 1960), espèce halophile nouvelle pour la Martinique. (Myriapoda, Chilopoda, Geophilomorpha)
Fil: Pereira, Luis Alberto. División Zoología Invertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin
Discovery of a second geophilomorph species (Myriapoda: Chilopoda) having twenty-seven leg-bearing segments, the lowest number recorded up to the present in the centipede order geophilomorpha
Schendylops ramirezi sp. nov. (Myriapoda: Chilopoda), a tiny schendylid centipede (from Rio de Janeiro State, Brazil), is hereby described and illustrated based on the female holotype, male and female paratypes, and additional non-type specimens. This discovery represents the second geophilomorph species characterized by having twenty-seven leg-bearing segments, the lowest number recorded up to the present in the chilopod order Geophilomorpha. So far, this number of pairs of legs (27) had only been found in a single (male) specimen of Schendylops oligopus (Pereira, Minelli & Barbieri, 1995), collected in the vicinity of Manaus, Central Amazon (Brazil). New distribution records for S. oligopus (with which the new species is herein compared in detail), together with complementary descriptive notes and new illustrations are also given. Undiluted 2-Phenoxyethanol (CAS No. 122-99-6) has been used as an effective clearing agent and mounting medium for the preparation of temporary mounts of the examined specimens.Schendylops ramirezi sp. nov. (Myriapoda: Chilopoda), un diminuto ciempiés perteneciente a la familia Schendylidae (de Brasil, Estado de Río de Janeiro), se describe e ilustra sobre la base del holotipo hembra, paratipos macho y hembra, y otros especímenes adicionales no tipo. Este descubrimiento representa la segunda especie de geofilomorfo caracterizada por tener veintisiete segmentos pedales, el número más bajo registrado hasta el presente en quilópodos del orden Geophilomorpha. Hasta ahora, este número de pares de patas (27) solamente había sido encontrado en un único ejemplar (macho) de Schendylops oligopus (Pereira, Minelli & Barbieri, 1995) colectado en proximidades de Manaus, Amazonia Central (Brasil). Nuevos registros de distribución geográfica para S. oligopus (con la cual la nueva especie es aquí comparada en detalle), junto con notas descriptivas complementarias y nuevas ilustraciones también son brindadas. Se ha utilizado 2-Phenoxyethanol (CAS No. 122-99-6) no diluido, como un efectivo agente de diafanización (y a la vez medio de montaje), para la realización de preparaciones microscópicas transitorias de los especímenes examinados.Fil: Pereira, Luis Alberto. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico La Plata; Argentin
Publications (and list of taxa of Chilopoda Geophilomorpha described as new)
Fil: Pereira, Luis Alberto. División Zoología Invertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin
A redescription of Ribautia picturata Lawrence, 1960, a little known geophilid centipede from Madagascar (Myriapoda: Chilopoda: Geophilomorpha)
The geophilomorph centipede Ribautia picturata Lawrence, 1960 from Madagascar is redescribed and illustrated based on the type material preserved in the collections of the Muséum national d’Histoire naturelle in Paris. The original generic allocation of the species is confirmed. A distribution map is also provided for the taxon. Morphological traits of R. picturata apparently do not identify it as particularly similar to the species, or species groups of Ribautia, inhabiting a given geographic area. Phylogenetic and biogeographic affinities cannot be established until appropriate and comprehensive analyses of the genus are performed.Facultad de Ciencias Naturales y Muse
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