Interactive book reading to accelerate word learning in bilingual children with developmental language disorder: A preliminary intervention approach

This article will describe a bilingual preliminary treatment method currently being utilized in a clinical research study to teach vocabulary to bilingual (Spanish/English) preschool aged (four to six year-old) children with Developmental Language Disorder (DLD). The objective of this treatment method is to advance English vocabulary while supporting the native language abilities of English Learners (ELs). In this bilingual treatment method, Spanish and English are used within the session, which includes the reading of books in English and Spanish and the teaching of vocabulary in English and Spanish

Structural Evaluation of Bamboo Bike Frames: Experimental and Numerical Analysis

Construction of bicycles with bamboo frames has become an alternative to improve the quality of life of some communities, be friendly with the environment and be ecologically sustainable. However, the production of bike frames is made in an artisanal way and there are few antecedents that have proven their reliability. This work presents the evaluation and simulation of the mechanical behavior of bike frames made in bamboo. Three-points bending tests were performed using bamboo bars with similar dimensions to bike frames, and an equivalent elasticity modulus was determined and used as the input datum of a finite element model. A linear model material and beam elements were used to model the bike frame. Tests were performed using bike frames of bamboo applying loads greater than 7000 N, and the displacements were measured. The experimental displacements were used to calibrate the model, which consisted of modifying the rigidity of the connections until the displacements of the model fit near to 90%. The calibrated model was used for a fatigue simulation in order to predict the lifespan of the bike frame. Some technical values of bamboo bike frames were obtained so that these will allow them to define the technical characteristics of the product and guarantee their operating conditions

Complex viscosity behavior and cluster formation in attractive colloidal systems

The increase of the viscosity, which is observed in attractive colloidal systems by varying the temperature or the volume fraction, can be related to the formation of structures due to particle aggregation. In particular we have studied the non trivial dependence of the viscosity from the temperature and the volume fraction in the copolymer-micellar system L64. The comparison of the experimental data with the results of numerical simulations in a simple model for gelation phenomena suggests that this intriguing behavior can be explained in terms of cluster formation and that this picture can be quite generally extended to other attractive colloidal systems.Comment: 5 pages, 4 figure

Wearable estimation of central aortic blood pressure : Feasibility study.

http://revistasabi.fi.mdp.edu.ar/index.php/revista/article/view/291Introduction: Central aortic blood pressure (CABP) estimation from electrocardiogram (ECG) and ballistocardiogram (BCG) acquisitions might be feasible, according to previous research. The result is based on acquisitions with off-the-shelf equipment and some custom electronics. This work aims to evaluate whether a proposed wearable device is capable of achieving similar feasibility results on CABP estimation, but also the study aims to situate the scope of this method to predict CABP readings. Methods: The study used data from one healthy subject involving three days of intermittent CABP observations, and waveforms from ECG and BCG signals. The methodology was evaluated in two levels, from a simple perspective to evaluate feasibility of the method for the CABP estimation ( Evaluation level-1: CABP human-model (HM) is constructed and tested using the same data-sets); to moderate-hard by evaluating the capability of the calibrated CABP-HM to predict unseen CABP data accurately (Evaluation level-2). CABP variables were assessed non-invasively by the use of the SphygmoCor XCEL system (AtCor Medical, Sydney, Australia) during hemodynamic maneuvers. Results: Level-1 evaluation presented strong correlations of r ? 0.9, and strong agreement (linear regression parameters) m ? 0.8 and y ? 20mmHg between CABP measurements and estimations. Root mean square error of RMSE ? 2.3mmHg. The level-2 evaluation showed significantly degraded performances when the same figures of merit were assessed. A three-day calibration interval was considered for the level-2 evaluation. Conclusions: Findings in this paper showed that results achieved with off-the-shelf equipment could be replicated by using a proposed wearable device. CABP estimation from the proposed wearable device could be feasible by using three feature times studied in this work (RI, RJ, and IJ intervals) as CABP surrogates. CABP could be accurately predicted by the proposed methodology when (in the order of) daily calibrations are performed.Introducción: Recientemente se ha mostrado que la estimación de la presión aóortica central (PAc) a partir de electrocardiograma (ECG) y el balistocardiograma (BCG) podría ser factible, el resultado es basado en adquisición con equipos convencionales y electrónica custom. Este trabajo tiene como objetivo evaluar si el dispositivo vestíble que se propone es capaz de lograr resultados de factibilidad similares para la estimación Pac, adicionalemente se busca situar el alcance de este método para predecir con precisión PAc. Métodos: El estudio utilizó 67 datos de un sujeto saludable que incluyó tres días de observaciones intermitentes de PAc y formas de onda de se ñales de ECG y BCG. La metodología se evaluó en dos niveles. Evaluación nivel-1 (para estudiar la factibilidad del método): el modelo humano(HM) de PAc se construyó y testeó utilizando el mismo conjuntos de datos. La evaluación nivel-2 evaluó la capacidad del PAc-MH calibrado para predecir datos nuevos de PAc. Las variables PAc se midieron de forma no-invasiva utilizando el equipo SphygmoCor XCEL durante maniobras hemodinámicas. Resultados: la evaluación de nivel-1 presentó fuertes correlaciones de r ≈ 0.9, y una fuerte concordancia (parámetros de regresión lineal) m≈ 0.8 e y ≈ 20mmHg entre las mediciones y estimaciones de PAc. La evaluación de nivel-2 mostró rendimientos significativamente degradados cuando se evaluaron las mismas cifras de mérito. Se consideró un intervalo de calibración de tres días para la evaluacón de nivel-2. Conclusiones: los resultados logrados en el trabajo anterior podrían replicarse mediante el uso del dispositivo vestíble propuesto; y, la estimación CABP podría ser factible utilizando tres tiempos de características estudiados en este trabajo (intervalos RI, RJ e IJ). Además, si se considera un intervalo de calibración dentro del día, la metodología propuesta podría lograr estimaciones precisas de la Pac

Gaussian tripartite entanglement in the simultaneous measurement of position and momentum

In this work, we prove the generation of genuine tripartite continuous-variable entanglement in the unitary dynamics of the simultaneous measurement process of position and momentum observables raised by Arthurs and Kelly, considering a measurement configuration where the system under examination is a rotated, displaced, and squeezed vacuum state. Under these assumptions, the measurement configuration is entirely described by a Gaussian state. Then, through the positive partial transpose criterion (PPT), we certify genuine tripartite entanglement by testing the non-separability of the three $\left(1~ \text{vs}~2\right)$-mode bipartitions of the system. This process allows us to classify the qualitative properties of the entanglement in the category of fully inseparable Gaussian states according to the classification exposed in [Giedke et al., \href{https://link.aps.org/doi/10.1103/PhysRevA.64.052303}{Phys. Rev. A \textbf{64}, 052303 (2001)}]. Besides, we determine the quantitative entanglement properties of the system using the residual tripartite R{\'e}nyi-2 entanglement as a quantifier measure.Comment: 15 pages, 8 figure

Static and dynamic heterogeneities in irreversible gels and colloidal gelation

We compare the slow dynamics of irreversible gels, colloidal gels, glasses and spin glasses by analyzing the behavior of the so called non-linear dynamical susceptibility, a quantity usually introduced to quantitatively characterize the dynamical heterogeneities. In glasses this quantity typically grows with the time, reaches a maximum and then decreases at large time, due to the transient nature of dynamical heterogeneities and to the absence of a diverging static correlation length. We have recently shown that in irreversible gels the dynamical susceptibility is instead an increasing function of the time, as in the case of spin glasses, and tends asymptotically to the mean cluster size. On the basis of molecular dynamics simulations, we here show that in colloidal gelation where clusters are not permanent, at very low temperature and volume fractions, i.e. when the lifetime of the bonds is much larger than the structural relaxation time, the non-linear susceptibility has a behavior similar to the one of the irreversible gel, followed, at higher volume fractions, by a crossover towards the behavior of glass forming liquids.Comment: 9 pages, 3 figure