Using multimedia in blended learning

The paper is focused on the use of modern methods, especially computers and the Internet in the educational process. The so-called Blended learning combines printed and electronic materials, online and offline teaching methods, etc. in the class and e-learning is phenomenon nowadays mainly in distance learning. The contribution also mentions Khan Academy as maybe the famous non-profit educational portal in the world. The goal of this contribution is to give an initial overview into this field of education and presents examples of educational videos from the field of Information Technologies that were created, verified and published on the Khan Academy portal. © 2019, Springer Nature Switzerland AG

Atmospheric delay for electromagnetic signals associated with space/time variations of the refractive index in the lower atmosphere: Applications in spatial geodesy

The feasibility quantifying atmospheric delay of electromagnetic signals using a mesoscale numerical model (WRF model) is explored. The experiment investigates a new alternative to reduce uncertainty sources in data exploitation for spatial geodesy applications. Our experiment was compared with GPS estimations of stations located in the South-America. The GPS estimations are consistent with values of our proposed methodology. This opens the possibility of using a mesoscale numerical model applied to spatial geodesy. However, these results, despite being promising, need further analysis and research, opening the opportunity to numerical modeling of atmospheric delays using mesoscale models