A recommender system for process discovery

Over the last decade, several algorithms for process discovery and process conformance have been proposed. Still, it is well-accepted that there is no dominant algorithm in any of these two disciplines, and then it is often difficult to apply them successfully. Most of these algorithms need a close-to expert knowledge in order to be applied satisfactorily. In this paper, we present a recommender system that uses portfolio-based algorithm selection strategies to face the following problems: to find the best discovery algorithm for the data at hand, and to allow bridging the gap between general users and process mining algorithms. Experiments performed with the developed tool witness the usefulness of the approach for a variety of instances.Peer ReviewedPostprint (author’s final draft

Low temperature CO oxidation

Catalytic low-temperature abatement of carbon monoxide becomes essential in environmental pollution control. CO Oxidation, CO Preferential Oxidation (PROX) and Water Gas Shift (WGS) reaction are the conventional technologies used to remove carbon monoxide at low temperature. Perovskite-type oxides have been extensively studied in the last years as catalysts for these reactions due to their high activity and catalytic stability. This chapter describes the state-of-the-art of using perovskite-based catalysts of general formula ABO3 in these reactions. Key factors such as the type and nature of A and B ions or the formation of oxygen vacancies or interstitials by doping are discussed in the light of the reaction mechanism in each casePeer reviewe

Siphoninus finitimus (Hemiptera: Aleyrodidae), "olive whitefly" in Arica-Chile

Se ent regan antecedentes sobr e las diferencias morfométricas en distintas estructuras de adultos y del pupoide de las poblaciones de aleyródidos asociados a olivo, peral y granado en la región de Arica- Parinacota, Chile. Las significativas diferencias (p < 0,01) encontradas en las dimensiones y en la morfología de las estructuras estudiadas entre las distintas poblaciones de mosquitas blancas que atacan a olivos respecto del peral y del granado, permiten establecer que en Arica la mosquita blanca del olivo es Siphoninus finitimus Silvestri y que S. phillyreae, está asociada a peral y granado.In this note are given background on the morphometric differences, in the genitalia of adults and the puparium of aleyrodidae populations associated with olive, pear and pomegranate in the region of Arica-Parinacota, Chile. The significant differences (p < 0.01) found in the dimension, and in the morphology of the structures studied between the different populations of whitelfly that attack to olive trees with regard to the pear and the pomegranate allow to establish that in Arica the whitefly of the olive tree is Siphoninus finitimus Silvestri and that S. phillyreae, it is associated with pear and pomegranate.Fil: Bobadilla Guzman, Dante. Universidad de Tarapacá (Chile). Facultad de Ciencias Agronómicas. Departamento de Recursos AmbientalesFil: Cerdá Hernández, Carolina. Universidad de Tarapacá (Chile). Facultad de Ciencias Agronómicas. Departamento de Recursos AmbientalesFil: Salvatierra Martínez, Ricardo. Universidad de Tarapacá (Chile). Facultad de Ciencias Agronómicas. Departamento de Recursos AmbientalesFil: Sepúlveda Chavera, Germán F.. Universidad de Tarapacá (Chile). Facultad de Ciencias Agronómicas. Departamento de Recursos Ambientale

On the interplay between the loop-tree duality and helicity amplitudes

The spinor-helicity formalism has proven to be very efficient in the calculation of scattering amplitudes in quantum field theory, while the loop tree duality (LTD) representation of multi-loop integrals exhibits appealing and interesting advantages with respect to other approaches. In view of the most recent developments in LTD, we exploit the synergies with the spinor-helicity formalism to analyse illustrative one- and two-loop scattering processes. We focus our discussion on the local UV renormalisation of IR and UV finite amplitudes and present a fully automated numerical implementation that provides efficient expressions which are integrable directly in four space-time dimensions.Comment: 12 pages, 5 figures. In v2: discussion on the application of two-loop local renormalisation added; references update

Gold Functionalized Supported Ionic Liquids Catalyst for CO Oxidation.

The present study tries to give an insight to the combination of the homogeneous and heterogeneous catalytic properties in a new class of materials. Well dispersed gold nanoparticles on an ionic liquid layer supported on a mineral carrier have been prepared. This work is concentrated on the characterizations and understanding of the interactions between all the components of the catalytic system. The application of the materials in the reaction of oxidation of carbon monoxide shows rather unexpected results¿a good catalytic activity completely independent of the temperature.L. Bobadilla acknowledges Junta de Andalucía (Project PDG-TEP01965). S. Ivanova and A. Penkova acknowledge MEC for their contracts Ramon y Cajal and Juan de la Cierva.Peer Reviewe

To dd, or not to dd: Recent developments and comparisons of regularization schemes

We give an introduction to several regularization schemes that deal with ultraviolet and infrared singularities appearing in higher-order computations in quantum field theories. Comparing the computation of simple quantities in the various schemes, we point out similarities and differences between them.Comment: 61 pages, 12 figures; version sent to EPJC, references update