delta beam
121Quasi-phase-matching — is a technique in nonlinear optics which allows a positive net flow of energy from the pump frequency to the signal and idler frequencies by creating a periodic structure in the nonlinear medium. Momentum is conserved, as is necessary for phase… …
122Singularity function — Singularity functions or singularity brackets are a notation used to describe discontinuous functions.langle x a angle^n = egin{cases}delta (x a) : n= 2delta(x a) : n= 1 : nge0, x …
123Novato Creek — Coordinates: 38°5′43″N 122°29′18″W / 38.09528°N 122.48833°W / 38.09528; 122.48833 …
124Media and Publishing — ▪ 2007 Introduction The Frankfurt Book Fair enjoyed a record number of exhibitors, and the distribution of free newspapers surged. TV broadcasters experimented with ways of engaging their audience via the Internet; mobile TV grew; magazine… …
125Beijing 2008 Olympic Games: Mount Olympus Meets the Middle Kingdom — Introduction officially Games of the XXIX Olympiad The Games of the XXIX Olympiad, involving some 200 Olympic committees and as many as 13,000 accredited athletes competing in 28 different sports, were auspiciously scheduled to begin at 8 …
126Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals …
127Raygun — A stereotypical raygun as shown in a 1955 patent application for a toy. This article is about weapons. For other meanings, see Raygun (disambiguat …
128List of Star Trek races — This is a list of sentient species and races from the fictional universe of the Star Trek media franchise. Contents A B C D E F G H I J K L M N O P Q R S T U V W X Y Z   Notes   …
