The existing OFDM scheme that maps symbols to subcarriers using an inverse fast Fourier transform (iFFT) operation uses a cyclic prefix (CP) to reduce inter-symbol interference in a multipath channel, ...

Abstract: The construction for thematic map symbol is a very complex and intelligent process. This symbol can be automatically generated and easily shared on the web through the syntactic ...

WW1 Trench Lighter Restoration. This lighter was found in the woods. The lighter of the revolver was broken and I decided to restore it. This lighter is from the First World War period.

The original spatstat package has been split into several sub-packages. This package spatstat.geom is one of the sub-packages. It defines classes of spatial objects, and supports geometrical ...

Google Maps’ New ‘Z’ Alert: The Secret Symbol That Could Save You Hundreds in Fines. Credit: JarTee, Shutterstock. If in the past few months you’ve opened Google Maps and spotted a strange “Z” on your ...

This old rusty lighter was found by a metal detector on a WW1 battlefield. This is an old trench lighter used by soldiers during the war. The lighter was rusty and broken.