La q??esti?? migrat??ria : ??un debat mediterrani o transoce??nic?

Resumen basado en el de la publicaci??n

An??lisis de la conceptualizaci??n del aprendizaje del alumnado de Grados en Educaci??n : una aplicaci??n de la metodolog??a Q

Resumen tomado de la publicaci??n

A new all-round density functional based on spin states and SN2 barriers

We report here a new empirical density functional that is constructed based on the performance of OPBE and PBE for spin states and SN 2 reaction barriers and how these are affected by different regions of the reduced gradient expansion. In a previous study [Swart, Sol̀, and Bickelhaupt, J. Comput. Methods Sci. Eng. 9, 69 (2009)] we already reported how, by switching between OPBE and PBE, one could obtain both the good performance of OPBE for spin states and reaction barriers and that of PBE for weak interactions within one and the same (SSB-sw) functional. Here we fine tuned this functional and include a portion of the KT functional and Grimme's dispersion correction to account for π- π stacking. Our new SSB-D functional is found to be a clear improvement and functions very well for biological applications (hydrogen bonding, π -π stacking, spin-state splittings, accuracy of geometries, reaction barriers)

The relation of E.Q and I.Q. to learning from the standard self-instructional programs in spelling and english

This paper reviews a study that was done with hearing and hearing impaired children to test the effectiveness of self-instructional programs and whether the results can be correlated with Educational Quotient and Intelligence Quotient.

Aplicación del rediseño curricular de EIB en el sexto y séptimo nivel de educación básica del Centro Educativo Experimental Intercultural Bilingüe "CEDEIB-Q" de San Roque, Quito, Pichincha

El reto de los sistemas educativos debe centrar en ofrecer la calidad que la sociedad exige: primero por la atención a la diversidad, que demanda de una oferta educativa de atención definida, que cada alumno requiere en términos de equidad y segundo por una permanente evaluación que es el medio de disposición de elementos de juicio fiables y válidos, para tomar medidas inmediatas de mejora de los diferentes componentes del sistema educativo, con mayor convencimiento de que la educación intercultural sigue siendo una de las prioridades centrales de la humanidad, sustentada en la equidad, pertinencia, eficacia y eficiencia característica, de la excelencia. En este contexto el trabajo que se presenta en esta tesis, es un intento por entregar una visión representada como un proceso de investigación, análisis e interrelación de reformas educativas de los sistemas, con la historia de los procesos de lucha de los pueblos indígenas exteriorizado en experiencias educativas previas y las sugerencias de las concepciones técnico-científicas de la educación vinculado con el siglo XXI la sociedad del conocimiento y de la información, un interés por comprender en educación la realidad socio-lingüística, político-económica y socio-cultural de los pueblos indígenas. Sin embargo en el esfuerzo de realizar esta investigación, sobre la “Aplicación del Rediseño Curricular de EIB., en el sexto y séptimo nivel de Educación Básica del CEDEIB-Q” de San Roque, Quito, Pichincha, a pesar de que las experiencias previas antes de la creación de la DINEIB han sido exitosas, el sistema de EIB., no ha contribuido a fortalecer estas expectativas, puesto que según los resultados, existiendo un instrumento curricular, no ha apoyado a su real aplicación: las “clases” se realizan en español, no existen materiales de consistencia en LM., no se evidencia la presencia de los factores asociados al proceso, se demuestra un descuido total del sistema en los procesos de reconceptualización del currículo, capacitación, acompañamiento y evaluación continua.

"Indianizar al 'Q'ara' ": una nueva política de conocimiento (Tema Central)

La presencia, en Bolivia de un katarismo radical, promovido por los más recientes movimientos indigenistas, nos obliga a repensar las políticas de conocimiento criollo-mestizas. En este sentido, el presente artículo ubica la propuesta de "indianizar al q'ara" como una "pedagogía al revés" con la cual la ideología katarista radical de Felipe Quispe, alias "el Mallku", cuestiona desde abajo el mestizaje que los grupos dominantes promueven desde principios de siglo.

Parameter sensitivity and predictive uncertainty in a new water quality model, Q(2)

A new dynamic model of water quality, Q(2), has recently been developed, capable of simulating large branched river systems. This paper describes the application of a generalized sensitivity analysis (GSA) to Q(2) for single reaches of the River Thames in southern England. Focusing on the simulation of dissolved oxygen (DO) (since this may be regarded as a proxy for the overall health of a river); the GSA is used to identify key parameters controlling model behavior and provide a probabilistic procedure for model calibration. It is shown that, in the River Thames at least, it is more important to obtain high quality forcing functions than to obtain improved parameter estimates once approximate values have been estimated. Furthermore, there is a need to ensure reasonable simulation of a range of water quality determinands, since a focus only on DO increases predictive uncertainty in the DO simulations. The Q(2) model has been applied here to the River Thames, but it has a broad utility for evaluating other systems in Europe and around the world.

Sonic to ultrasonic Q of sandstones and limestones: Laboratory measurements at in situ pressures

Laboratory measurements of the attenuation and velocity dispersion of compressional and shear waves at appropriate frequencies, pressures, and temperatures can aid interpretation of seismic and well-log surveys as well as indicate absorption mechanisms in rocks. Construction and calibration of resonant-bar equipment was used to measure velocities and attenuations of standing shear and extensional waves in copper-jacketed right cylinders of rocks (30 cm in length, 2.54 cm in diameter) in the sonic frequency range and at differential pressures up to 65 MPa. We also measured ultrasonic velocities and attenuations of compressional and shear waves in 50-mm-diameter samples of the rocks at identical pressures. Extensional-mode velocities determined from the resonant bar are systematically too low, yielding unreliable Poisson's ratios. Poisson's ratios determined from the ultrasonic data are frequency corrected and used to calculate the sonic-frequency compressional-wave velocities and attenuations from the shear- and extensional-mode data. We calculate the bulk-modulus loss. The accuracies of attenuation data (expressed as 1000/Q, where Q is the quality factor) are +/- 1 for compressional and shear waves at ultrasonic frequency, +/- 1 for shear waves, and +/- 3 for compressional waves at sonic frequency. Example sonic-frequency data show that the energy absorption in a limestone is small (Q(P) greater than 200 and stress independent) and is primarily due to poroelasticity, whereas that in the two sandstones is variable in magnitude (Q(P) ranges from less than 50 to greater than 300, at reservoir pressures) and arises from a combination of poroelasticity and viscoelasticity. A graph of compressional-wave attenuation versus compressional-wave velocity at reservoir pressures differentiates high-permeability (> 100 mD, 9.87 X 10(-14) m(2)) brine-saturated sandstones from low-permeability (< 100 mD, 9.87 X 10 (14) m(2)) sandstones and shales.

Autonomous intelligent cruise control using a novel multiple-controller framework incorporating fuzzy-logic-based switching and tuning

This paper presents a novel intelligent multiple-controller framework incorporating a fuzzy-logic-based switching and tuning supervisor along with a generalised learning model (GLM) for an autonomous cruise control application. The proposed methodology combines the benefits of a conventional proportional-integral-derivative (PID) controller, and a PID structure-based (simultaneous) zero and pole placement controller. The switching decision between the two nonlinear fixed structure controllers is made on the basis of the required performance measure using a fuzzy-logic-based supervisor, operating at the highest level of the system. The supervisor is also employed to adaptively tune the parameters of the multiple controllers in order to achieve the desired closed-loop system performance. The intelligent multiple-controller framework is applied to the autonomous cruise control problem in order to maintain a desired vehicle speed by controlling the throttle plate angle in an electronic throttle control (ETC) system. Sample simulation results using a validated nonlinear vehicle model are used to demonstrate the effectiveness of the multiple-controller with respect to adaptively tracking the desired vehicle speed changes and achieving the desired speed of response, whilst penalising excessive control action. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.

Switching curve control of functional electrical stimulation assisted rowing exercise in paraplegia

An indoor rowing machine has been modified for functional electrical stimulation (FES) assisted rowing exercise in paraplegia. To perform the rowing manoeuvre successfully, however, the voluntarily controlled upper body movements must be co-ordinated with the movements of the electrically stimulated paralysed legs. To achieve such co-ordination, an automatic FES controller was developed that employs two levels of hierarchy. At the upper level, a finite state controller identifies the state or phase of the rowing cycle and activates the appropriate lower-level controller, in which electrical stimulation to the paralysed leg muscles is applied with reference to switching curves representing the desired seat velocity as a function of the seat position. In a pilot study, the hierarchical control of FES rowing was shown to be intuitive, reliable and easy to use. Compared with open-loop control of stimulation, all three variants of the closed-loop switching curve controllers used less muscle stimulation per rowing cycle (73% of the open-loop control on average). Further, the closed-loop controller that used switching curves derived from normal rowing kinematics used the lowest muscle stimulation (65% of the open-loop control) and was the most convenient to use for the client.

Switching on a two-dimensional time-harmonic scalar wave in the presence of a diffracting edge

This paper concerns the switching on of two-dimensional time-harmonic scalar waves. We first review the switch-on problem for a point source in free space, then proceed to analyse the analogous problem for the diffraction of a plane wave by a half-line (the ‘Sommerfeld problem’), determining in both cases the conditions under which the field is well-approximated by the solution of the corresponding frequency domain problem. In both cases the rate of convergence to the frequency domain solution is found to be dependent on the strength of the singularity on the leading wavefront. In the case of plane wave diffraction at grazing incidence the frequency domain solution is immediately attained along the shadow boundary after the arrival of the leading wavefront. The case of non-grazing incidence is also considered.