air coupling
51Radiofrequency MASINT — is one of the six major disciplines generally accepted to make up the field of Measurement and Signature Intelligence (MASINT), with due regard that the MASINT subdisciplines may overlap, and MASINT, in turn, is complementary to more traditional… …
52Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …
53Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
54Decoupling — The term decoupling is used in many different contexts. Contents 1 Economics 1.1 Economic growth without environmental damage 1.2 Decoupling and the stock market declines of January 2008 …
55FICON project — The FICON (Fighter Conveyor) program was conducted by the United States Air Force in the 1950s to test the feasibility of a B 36 Peacemaker bomber carrying an F 84 parasite fighter in its bomb bay. This article also covers wingtip coupling… …
56Inductance — Electromagnetism Electricity · …
57Tweeter — A tweeter is a loudspeaker designed to produce high frequencies, typically from around 2,000 hertz to 20,000 hertz (20,000 Hz, generally considered to be the upper limit of the human hearing). A few tweeters can manage response up to an octave or …
58Quartz crystal microbalance — A quartz crystal microbalance (QCM) measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film… …
59Buoyancy — The forces at work in buoyancy In physics, buoyancy (  / …
60Douglas X-3 Stiletto — X 3 Stiletto Role Experimental Manufacturer Douglas Designer Schuyl …
