Universidad del Norte, Colombia

About: Universidad del Norte, Colombia is a education organization based out in Barranquilla, Colombia. It is known for research contribution in the topics: Population & Context (language use). The organization has 3562 authors who have published 4355 publications receiving 37861 citations. The organization is also known as: University of the North, Colombia & Uninorte.

Metacognición, escritura y rendimiento académico en universitarios de Colombia y Francia

Abstract: La metacognicion integra el conocimiento de los propios procesos cognitivos y el control o supervision que ejercemos sobre ellos (Flavell, 1992). Estas dos habilidades intelectuales son decisivas para el exito academico (Ellis, 2004), y un factor clave para comprender mejor el problema de la desercion y el bajo rendimiento academico. Los objetivos del presente estudio fueron a) describir los niveles de conocimientos metacognitivos y de estrategias de planificacion que estudiantes universitarios reconocen en sus procesos de produccion de textos, a) al igual que determinar la relacion que existe entre dicha percepcion de sus procesos metacognitivos implicados en la produccion de textos y el rendimiento academico. Se postula como hipotesis que al declarar bajos niveles de conocimientos metacognitivos y de estrategias de planificacion en la composicion de textos, los estudiantes muestran bajos niveles de rendimiento academico. Fue utilizado un diseno descriptivo comparativo con 462 estudiantes universitarios seleccionados intencionalmente de dos programas de psicologia (231 colombianos, 231 franceses, con edad promedio de 18,8 y 20,1 anos respectivamente), quienes respondieron a un cuestionario de autoreporte sobre Metacognicion compuesto por dos escalas: Conocimientos metacognitivos y Estrategias de planeacion. Se encontro que los estudiantes declaran hacer uso de conocimientos metacognitivos al realizar sus trabajos escritos. Los estudiantes colombianos indican utilizar de manera ocasional las estrategias de planificacion, mientras que los franceses indican que lo hacen con mas frecuencia. Ademas, una correlacion positiva aparece entre el nivel de rendimiento y los conocimientos metacognitivos.

Evaluation of Unbound Aggregate Base Layers using Moisture Monitoring Data

Abstract: The behaviors of unbound aggregate base (UAB) and subgrade layers are considerably affected by seasonal moisture fluctuations which ultimately affect both their load-bearing capacity and the overal...

Towards the integration of lean principles and optimization for agricultural production systems: a conceptual review proposition

Abstract: Operative planning in agricultural production has historically had the objective of improving yields and quality. Sowing, cropping, and harvesting are usually treated independently, and waste and the sustainability of operations are generally not integrated into operational planning methodologies for agricultural production. This study shows the need to have a clear and precise methodology to minimize waste in agricultural production systems to ensure sustainability. This need is addressed with a novel methodological guide to minimizing waste in agricultural operations, crop maintenance, and harvesting. The proposed methodology is founded on the use of lean manufacturing as a waste-management tool. Lean manufacturing principles allow agricultural operations and the variables that represent wastes to be identified, mathematical models to be built, constraints to be defined, and the cost of waste to be illustrated, as well as its minimization through an objective function. To guide implementation, we propose a conceptual model to explain the construction of a mathematical model that represents the development of decision variables on agricultural operations with the elements to consider and the constraints and theoretical proposal of the necessary objective function. The proposed conceptual model and the constructed methodology constitute a novel development within agricultural production systems that could be used by decision makers and farmers. © 2019 Society of Chemical Industry.

Transporte de sedimentos en suspensión en los principales ríos del Caribe colombiano: magnitud, tendencias y variabilidad

Abstract: The data on the monthly average of suspended sediment load from seven rivers in northern Colombia (Caribbean alluvial plain) draining into the Caribbean Sea were analysed to quantify the magnitudes, to estimate long-term trends, and to evaluate the variability patterns. These rivers deliver an average of ∼146.3 x106 t yr-1 of suspended sediments to the Colombian Caribbean littoral. The largest sediment supply is provided by the Magdalena River, with a mean suspended sediment load of 142.6 x106 t yr-1, which is 38% of the total fluvial discharge estimated for the Caribbean littoral. Between 2000 and 2010, the annual suspended sediment load of these rivers increased to 36%. The wavelet spectral analyses highlighted periods of intense variability between the periods of 1987-1990 and 1994-2002, where the major oscillation processes appeared simultaneously. The semi-annual, annual and quasi-decadal bands were the main factors controlling the suspended sediment load variability of these fluvial systems, whereas the quasi-biennial and interannual bands constituted second order sources of variability. The climatic/oceanographic drivers associated to the oscillations identified through the wavelet spectral analyses defined a medium/long term framework of variability for the suspended sediment load.