In the mid-19th century, Bernhard Riemann conceived of a new way to think about mathematical spaces, providing the foundation ...
Abstract: The Dual-Frequency Multi-Constellation Ground Based Augmentation System (DFMC GBAS) holds significant potential for enabling safe and precise urban air mobility (UAM) operations, such as ...
Individual aseismic areas move as rigid plates on the surface of a sphere. Application of the Mercator projection to slip vectors shows that the paving stone theory of world tectonics is correct and ...