Four teachers & their eight classes of 179 5th-grade (10-11-year-old) students participated in this quasi-experimental classroom study, which investigated the effects of form-focused instruction (FFI) & corrective feedback on immersion students' ability to accurately assign grammatical gender in French. The…

In this article we study the retrospective inverse problem. The retrospective inverse problem consists of in the reconstruction of a priori unknown initial condition of the dynamic system from its known final condition. Existence and uniqueness of the solution is…

Research studying effective planning and optimization in the vehicle routing field has increased tremendously in the last few decades. Advances in technology and computational power have encouraged researchers to consider various vehicle routing problem types and constraints, and to experiment…

Basic concepts like energy, heat, and temperature have acquired a precise meaning after the development of thermodynamics. Thermodynamics provides the basis for understanding how heat and work are related and with the general rules that the macroscopic properties of systems…

Open Source Software projects base their operation on collaborative structure for knowledge exchange in the form of provision or reception of information, expertise and feedback on the creation of source code. Here, we address the direction of these knowledge flows…

La separación de biomoléculas de alto valor añadido, con tamaño y características similares como la albúmina de suero bovino (BSA) y la lactoferrina (LF), representa uno de los retos más difíciles en la industria bioquímica. Durante 100 años las técnicas…

Breast Cancer Resistance Protein (BCRP, ABCG2) and P-glycoprotein (P-gp, ABCB1, MDR1) are
members of the G and B subfamily of the ATP-binding cassette (ABC) efflux transporters, respectively.
Both transporters use the energy of ATP hydrolysis for substrate efflux.…

En esta tesis doctoral se propone la utilización de una metodología espacial para la integración de construcciones rurales en su entorno, mediante la utilización de un sistema de evaluación de criterios múltiples (ECM), en un entorno web asistido por la…

Generally, drilling fluids may be multicomponent suspensions, emulsions and/or foams, basically consisting of a base fluid (oil or water), viscosifiers/thinners (clays, biopolymers, etc) and weighting agents (salts) designed to lubricate during drilling operation and removal the cuttings, among others functions.…

Desde inicios de esta década, se ha registrado en Centroamérica un crecimiento importante de la presencia de pandillas conocidas como “maras”. Estas pandillas surgieron en Estados Unidos en los años ochenta y luego se desarrollan en Centroamérica como consecuencia de…