El gènere del text de divulgació científica: una proposta d’aplicació a l’aula

L’objectiu d’aquest estudi és presentar una proposta de lectura i producció textual, el Text de Divulgació Científica, tot fent servir una seqüència didàctica, per tal de preparar l’alumne per a la lectura i anàlisi de l’estructura textual que presenta aquest gènere discursiu, així com despertar-li l’interès per la recerca. D’aquesta manera, l’alumne comptarà amb instruments per a la producció escrita del gènere discursiu del text de divulgació científica. La proposta es basa en els treballs d’autors de lingüística textual i anàlisi del discurs.

Autonomía y calidad de la educación

Resumen tomado de la publicación

Indigentes (incapacitados) sem voz e sem vez…. (Histórias de vida de deficientes mentais).

Resumen tomado de la publicación

La evaluación del profesorado, un indicador de calidad.

Resumen tomado de la publicación

La formació competencial dels llicenciats en economia i empresa : una visió des del seu entorn profesional

Resumen basado en el de la publicación

Los valores y su influencia en la satisfacción vital de los adolescentes entre los 12 y los 16 años: estudio de algunos correlatos

In this research we explore several aspects about the quality of life of youth from factors such as self-esteem, locus of control, the social perceived support, values, etc. In this article we study the correlations among factors the influence the values and vital satisfaction of adolescents aged 12-16 years old. We analyze data from boys and girls and from their parents, we explore the relationship between the factors and we explore the concordances and discrepancies of their answers

Contaminants emergents i prioritaris: aportacions de la recerca científica plans de gestió fluvial = Contaminantes emergentes y prioritarios: aportaciones de la investigación científica a los planes de gestión de Cuenca = Emerging and priority pollutants: bringing science into river management plans

Recull de resums de les ponències, programa, i llista de participants de les Jornades "Contaminants emergents i prioritaris: aportacions de la recerca científica als plans de gestió fluvial" celebrades a Girona el 25 i 26 de març de 2010

La Posada en escena d'òpera en la didàctica de l'expressió musical

Proposem en aquest article una metodologia concreta per a l'anàlisi d'una òpera i la seva posada en escena, amb la intenció de formar l'espectador en el reconeixement de la veritat artística i la bellesa que aquesta comporta. Mitjançant l'estudi d'aquesta metodologia s'observa com l'expressió musical en la dramatúrgia de l'obra, manifestació de la veritat de l'obra i per tant del compositor, és l'eix central de la seva posada en escena i de la realització de l'òpera com a obra artística

Enhancement of oxidation rate of a-Si nanoparticles during dehydrogenation

Oxidation of amorphous silicon (a-Si) nanoparticles grown by plasma-enhanced chemical vapor deposition were investigated. Their hydrogen content has a great influence on the oxidation rate at low temperature. When the mass gain is recorded during a heating ramp in dry air, an oxidation process at low temperature is identified with an onset around 250°C. This temperature onset is similar to that of hydrogen desorption. It is shown that the oxygen uptake during this process almost equals the number of hydrogen atoms present in the nanoparticles. To explain this correlation, we propose that oxidation at low temperature is triggered by the process of hydrogen desorption

Error and complexity of random walk Monte Carlo radiosity

The author studies the error and complexity of the discrete random walk Monte Carlo technique for radiosity, using both the shooting and gathering methods. The author shows that the shooting method exhibits a lower complexity than the gathering one, and under some constraints, it has a linear complexity. This is an improvement over a previous result that pointed to an O(n log n) complexity. The author gives and compares three unbiased estimators for each method, and obtains closed forms and bounds for their variances. The author also bounds the expected value of the mean square error (MSE). Some of the results obtained are also shown

Estudi de la viabilitat d'incorporar la figura del/de la psicopedagog/a al CAS Teresa Ferrer

Anàlisi de funcionament del Centre d’Atenció i Seguiment de drogodependents (CAS) Teresa Ferrer), i posterior proposta de viabilitat per incorporar la figura del/de la psicopedagog/a en un centre com aquest. Es busca un suport legal que ho recolzi, i es fa una exposició de totes les funcions que podria assolir aquest nou professional, incloent-hi les que actualment ja es duen a terme i altres que es podrien realitzar

Selected configuration interaction with truncation energy error and application to the Ne atom

Selected configuration interaction (SCI) for atomic and molecular electronic structure calculations is reformulated in a general framework encompassing all CI methods. The linked cluster expansion is used as an intermediate device to approximate CI coefficients BK of disconnected configurations (those that can be expressed as products of combinations of singly and doubly excited ones) in terms of CI coefficients of lower-excited configurations where each K is a linear combination of configuration-state-functions (CSFs) over all degenerate elements of K. Disconnected configurations up to sextuply excited ones are selected by Brown's energy formula, ΔEK=(E-HKK)BK2/(1-BK2), with BK determined from coefficients of singly and doubly excited configurations. The truncation energy error from disconnected configurations, Δdis, is approximated by the sum of ΔEKS of all discarded Ks. The remaining (connected) configurations are selected by thresholds based on natural orbital concepts. Given a model CI space M, a usual upper bound ES is computed by CI in a selected space S, and EM=E S+ΔEdis+δE, where δE is a residual error which can be calculated by well-defined sensitivity analyses. An SCI calculation on Ne ground state featuring 1077 orbitals is presented. Convergence to within near spectroscopic accuracy (0.5 cm-1) is achieved in a model space M of 1.4× 109 CSFs (1.1 × 1012 determinants) containing up to quadruply excited CSFs. Accurate energy contributions of quintuples and sextuples in a model space of 6.5 × 1012 CSFs are obtained. The impact of SCI on various orbital methods is discussed. Since ΔEdis can readily be calculated for very large basis sets without the need of a CI calculation, it can be used to estimate the orbital basis incompleteness error. A method for precise and efficient evaluation of ES is taken up in a companion paper

Linear response functions for a vibrational configuration interaction state

Linear response functions are implemented for a vibrational configuration interaction state allowing accurate analytical calculations of pure vibrational contributions to dynamical polarizabilities. Sample calculations are presented for the pure vibrational contributions to the polarizabilities of water and formaldehyde. We discuss the convergence of the results with respect to various details of the vibrational wave function description as well as the potential and property surfaces. We also analyze the frequency dependence of the linear response function and the effect of accounting phenomenologically for the finite lifetime of the excited vibrational states. Finally, we compare the analytical response approach to a sum-over-states approach

A systematic and feasible method for computing nuclear contributions to electrical properties of polyatomic molecules

An analytic method to evaluate nuclear contributions to electrical properties of polyatomic molecules is presented. Such contributions control changes induced by an electric field on equilibrium geometry (nuclear relaxation contribution) and vibrational motion (vibrational contribution) of a molecular system. Expressions to compute the nuclear contributions have been derived from a power series expansion of the potential energy. These contributions to the electrical properties are given in terms of energy derivatives with respect to normal coordinates, electric field intensity or both. Only one calculation of such derivatives at the field-free equilibrium geometry is required. To show the useful efficiency of the analytical evaluation of electrical properties (the so-called AEEP method), results for calculations on water and pyridine at the SCF/TZ2P and the MP2/TZ2P levels of theory are reported. The results obtained are compared with previous theoretical calculations and with experimental values

Variational calculation of static and dynamic vibrational nonlinear optical properties

The vibrational configuration interaction method used to obtain static vibrational (hyper)polarizabilities is extended to dynamic nonlinear optical properties in the infinite optical frequency approximation. Illustrative calculations are carried out on H2 O and N H3. The former molecule is weakly anharmonic while the latter contains a strongly anharmonic umbrella mode. The effect on vibrational (hyper)polarizabilities due to various truncations of the potential energy and property surfaces involved in the calculation are examined