II AMONG the mathematical processes known to the Egyptians (for some few of which we have to go to the Berlin and Moscow papyri) were squaring and extraction of square roots, arithmetical progressions ...

The Vertices'N'Faces structure (VNF) holds the data used by polyhedron() to construct objects: a vertex list and a list of faces. This library makes it easier to construct polyhedra by providing ...

Abstract: We present RAPPIDS: a novel collision checking and planning algorithm for multicopters that is capable of quickly finding local collision-free trajectories given a single depth image from an ...

👉 Learn how to find the volume and the surface area of a pyramid. A pyramid is a 3-dimensional object having a polygon as its base and triangular surfaces converging at a single point called its apex ...

Abstract: Onboard cable is important electrical equipment of an electric locomotive. In order to effectively evaluate the aging state of the cable, this article proposes a method to evaluate the aging ...

It has always fascinated, and worried me at the same time, how many people I meet that are still mesmerized by aspects of the pyramids in Egypt that archeologists solved many years ago. The when, how, ...

Scattered across an isolated, flat plain in Shaanxi Province, near the ancient capital of Xi’an, lie dozens of spectacular pyramid mounds that are little known outside of China. Mixed in with the ...

Rectangular prisms are polygons with an two identical rectangle end sections and four identical rectangular faces along the length. When the faces of the prism are all at right-angles to each other, ...