A Sparse Bayesian Approach for Joint Feature Selection and Classifier Learning

Peer-reviewed

A Hierarchical Approach for Multi-task Logistic Regression

Peer-reviewed

Mejoremos los procesos de enseñanza-aprendizaje mediante la investigación-acción

La investigación “Procesos de E-A en las escuelas La Bressola”, surge de la propuesta de los miembros del proyecto INTERREG III-A La Bressola-Universidad de Girona, de llevar a cabo una I-A a partir de los procesos de E-A en las escuelas La Bressola. Esta I-A no ha surgido de los mismos profesionales de La Bressola, sino que ha sido este agente externo quien ha presentado la propuesta y ha pedido su colaboración.Se han identificado los procesos de E-A que han favorecido la obtención de resultados exitosos, y ha sido a partir de éstos que se han establecido los elementos comunes para poderlos compartir, mejorando así la práctica educativa. El uso de una metodología cualitativa, durante el proceso de I-A, permite profundizar en los éxitos analizados, si bien en algún caso nos hemos encontrado que un mismo éxito se podría describir con matices diferentes. Con esta investigación se consigue que los docentes realicen una mayor reflexión sobre la práctica que llevan a cabo de manera espontánea y natural, así como el descubrimiento de recursos, procedimientos e instrumentos valiosos para incorporar en su docencia

Ouranós-Gaia. L’espai a Grècia III: anomenar l’espai

Aquesta obra recull les aportacions del III Col·loqui internacional sobre la concepció de l'espai a Grècia "Cel i Terra: anomenar l'espai a Grècia", coorganitzat per la Societat Catalana d'Estudis Clàssics (filial de l’Institut d’Estudis Catalans) i l'ICAC i que va tenir lloc els dies 29 i 30 de novembre del 2010. Es tracta del tercer volum sobre la concepció de l’espai a Grècia editat pel grup de recerca “L’espai segons el veien i el pensaven els grecs”.

Messiah

r1955, Boston.

Eletrodo íon-seletivo para determinação potenciométrica de alumínio(III) em meio de fluoreto

The construction and analytical evaluation of a coated graphite Al(III) ion-selective electrode, based on the ionic pair formed between the Al(F)n3-n anion and tricaprylylmethylammonium cation (Aliquat 336S) incorporated on a poly(vinylchloride) (PVC) matrix membrane are described. A thin membrane film of this ionic pair and dibutylphthalate (DBPh) in PVC was deposited directly on a cylindric graphite rod (2 cm length x 0.5 cm diameter) attached to the end of a glass tube using epoxy resin. The membrane solution was prepared by dissolving 40% (m/m) of PVC in 10 mL of tetrahydrofuran following addition of 45% (m/m) of DBPh and 15% (m/m) of the ionic pair. The effect of membrane composition, fluoride concentration, and several concomitants as potential interferences on the electrode response were investigated. The aluminium(III) ion-selective electrode showed a linear response ranging from 1.4 x 10-4 to 1.0 x 10-2 mol L-1, a detection limit of 4.0 x 10-5 mol L-1, aslope of -54.3±0.2mV dec-1 and a lifetime of more than 1 year (over 3000 determinations for each membrane). The slope indicates that the ion-selective electrode responds preferentially to the Al(F)4- species. Application of this electrode for the aluminium(III) determination in stomach anti-acid samples is reported.

Extração sortiva em barra de agitação para análise de fármacos em fluidos biológicos

A novel solventless sample preparation, stir-bar sorptive extraction (SBSE), for extraction, and sample enrichment of organic compounds from biological fluids, is described in this manuscript from principle to applications. The SBSE is based on sorptive extraction, whereby the compounds are extracted into a polymer coating, polydimethylsiloxane (PDMS), on a magnetic stirring rod. The extraction is controlled by the partitioning coefficient of drugs between the PDMS and sample matrix, and upon the sample-extraction medium phase ratio. The SBSE technique has been applied successfully, with high sensitivities, to biomedical analysis of volatiles and for semi-volatiles drugs from biological sample, including urine, plasma, and saliva. SBSE combined with in situ derivatization, drugs quite more polar (e.g. metabolites) also can be analyzed.

Líquidos iônicos como plastificantes em blendas de borracha nitrílica/polianilina

Two imidazolium-based ionic liquids (C4MIMTf2N and C4MIMBF4) were used to verify their influence on polyaniline (PANI) and nitrile rubber (NBR)/PANI blend properties and the vulcanization process. High conductivity values were observed for PANI-C4MIMTf2N samples and no interference was found for the C4MIMBF4 samples. These materials were added to NBR by mechanical mixing. Based on the torque results, the presence of C4MIMBF4 does not protect the vulcanization reaction of NBR with PANI as performed by C4MIMTf2N. The highest conductivity value was obtained with 7 wt. % of PANI-DSBA-C4MIMTf2N (10-6 S/cm). This result is attributed to the more effective interaction of PANI and NBR phases promoted by the ionic liquid.