EMERGING NATIONS' LEARNING SYSTEMS AND THE COVID-19 PANDEMIC: AN ANALYSIS.

National learning systems improve training and proficiency. In order to support education during the COVID-19 epidemic, the rate of online and remote learning accelerated. Since there were some available technologies, strong, flexible educational infrastructures were required to accommodate a range of student demands.

Nanocrystalline Ni0.6Zn0.4Fe2O4: a novel semiconducting material for ethanol detection.

The structure and crystal phase of the nanocrystalline powders of Ni(1-x)Zn(x)Fe(2)O(4) (0 View Article and Find Full Text PDF

Nanocrystalline In2O3-based H2S sensors operable at low temperatures.

Nanocrystalline In(2)O(3)-based solid solutions, with different concentration of Co, with cubic structure were successfully prepared by a simple route. The as-prepared materials were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The indirect heating structure sensors based on pure and doped In(2)O(3) as sensitive materials were fabricated on an alumna tube with Au electrodes and gas-sensing properties of the sensor elements were measured as a function of concentration of dopant, operating temperature and concentrations of the test gases.