765 research outputs found
Valor taxonómico de la pilosidad de los frutos en centranthus calcitrapae (l.) Dufresne (valerianaceae)
Two different phenotypes have been observed with regard to fruit hairiness in Centranthus calcitrapaethroughout the Iberian Península, Baleario Island and France: hirsute and glabrous fruits. In this paper the inheritance of this character in two Andalusian populations has been inferredby using artificial crossings. It has been shown that fruit hairiness is based on a simple two-allele mendelian locus being hairiness dominant over the recessive glabrous fruits. Therefore,this character should not be used for separation of taxa.Centranthus calcitrapae presenta en la Península Ibérica, Islas Baleares y Francia individuos con frutos lisos o hirsutos. Estudiado el comportamiento genético de este carácter, por medio de cruzamientos artificiales, entre individuos de dos poblaciones andaluzas, llegamos a la conclusión de que está relacionado con la dominancia (frutos hirsutos) o recesividad (frutos glabros) de un único gen. Por ello, la pilosidad de los frutos no debería ser utilizada en la separación de categorías taxonómicas
Multi-criteria decision analysis to assess the environmental and economic performance of using recycled gypsum cement and recycled aggregate to produce concrete: the case of Catalonia (Spain)
The production of virgin raw materials used in construction and the generation of construction and demolition waste (CDW) are key environmental issues in the construction industry. Portland cement and concrete are used extensively in the construction sector. Processing of CDW to produce recycled gypsum cement and recycled aggregates (RA) and their use in the production of structural and non-structural concrete are one way of slowing natural resource depletion and reducing the amount of CDW landfilled. This study proposes the application of multi-criteria decision analysis (MCDA) to compare the production of “green” concretes made from recycled gypsum cement (RGC) and RA with the production of conventional concrete made from natural aggregate and ordinary Portland cement. The VIKOR MCDA method was employed to determine the best or a set of good alternative(s) for concrete production, considering environmental and economic criteria. The life cycle assessment method was used to select the environmental evaluation criteria, and the reference cost of producing concrete alternatives in Spain was used to determine economic criteria. The results of this study, in which environmental and economic criteria were considered of equal weight, or one of the two criteria was given greater weight, showed that the best option for structural and non-structural concrete was the use of RGC and RA. In both cases, the worst alternative was conventional concrete. In conclusion, we found that the use of RGC and RA in concrete production is positive because it replaces the original raw material, reduces the environmental impact, and lowers the economic costs.Postprint (published version
La relevancia de la formación y el contacto previo en la opinión de estudiantes universitarios sobre las personas con trastorno mental
Management of floristic information on the Internet: the Anthos solution
Anthos is the name of a database and search system for quality-controlled chorological and taxonomic information on the vascular plants of Spain. It provides a trustworthy solution for the handling of accepted names and their synonyms, based on an analysis of nomenclatural relations. It is based on the MS SQL-Server relational database system. Information can be found on any plant, using its accepted name or synonyms or vernacular names. The geographical search options include lists of all plants of a given territory, a province, a region, or an area delimited by its UTM coordinates. Additional information is available in the form of photographs or drawings, chromosome numbers, vernacular names and synonyms.Peer reviewe
Fixed points and boundary behaviour of the Koenigs function
We analyze the relationship between the fixed points of different iterates of an
analytic self-map of the unit disk. We show that, in general, a boundary fixed point of such a
function is not a fixed point of its iterates. However, in the context of fractional iteration, all the
iterates have the same fixed points. We also present results, in terms of the Koenigs function, of
self-maps whose behaviour are not so extreme as above
Aleksandrov-Clark measures and semigroups of analytic functions in the unit disc
In this paper we prove a formula describing the infinitesimal generator of a
continuous semigroup (\v_t) of holomorphic self-maps of the unit disc with
respect to a boundary regular fixed point. The result is based on
Alexandrov-Clark measures techniques. In particular we prove that the
Alexandrov-Clark measure of (\v_t) at a boundary regular fixed points is
differentiable (in the weak-topology) with respect to .Comment: 10 page
Infinitesimal generators of semigroups with prescribed boundary fixed points
We study infinitesimal generators of one-parameter semigroups in the unit disk D having prescribed boundary regular fixed points. Using an explicit representation of such infinitesimal generators in combination with Krein–Milman Theory we obtain new sharp inequalities relating spectral values at the fixed points with other important quantities having dynamical meaning. We also give a new proof of the classical Cowen–Pommerenke inequalities for univalent self-maps of D.Ministerio de Economía y Competitividad (España) and the European Union (FEDER) PGC2018-094215-B-100Junta de Andalucía (España) FQM-13
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