This article offers a historical analysis of the achievement level of mathematics learning in Mexican ninth graders.The results of the PISA, ENLACE and PLANEA tests are analyzed, with emphasis on the mathematics evaluations, given the relevance of this topic in the development of useful skills to generate technology for the 4th Industrial Revolutio
Introduction.One of predominant problems in energy systems is the economic operation of electric energy generating systems.In this paper, one a new evolutionary optimization approach, based on the behavior of meta-heuristic called grey wolf optimization is applied to solve the single and multi-objective optimal power flow and emission index problem
Ocean wave parameters, including wave height, direction and period, are necessary to improve forecasts of ocean wave conditions.Their accurate observation contributes to safety of both offshore operations and military operations.However, conventional wave observation methods that combine the three-axis accelerometer-based wave sensor with the gyros
Aim: To identify the effect of using different coloured bars on reading time for the bar reading task, along with an assessment of subject experience with different colour bars.Methods: Inclusion criteria were: visual acuity better than 0.5 logMAR, presence of binocular single vision, and ability to understand and perform bar reading.Measurements w