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21Michael Roukes — Born October 9, 1953 (1953 10 09) Redwood City, California Nationality …
22Network analysis (electrical circuits) — Linear Network Analysis Elements …
23Lambda — (uppercase Λ, lowercase λ; el. Λάμβδα or el. Λάμδα, Lamda) is the 11th letter of the Greek alphabet. In the system of Greek numerals it has a value of 30. It was derived from the Phoenician letter Lamed the name of the letter, Λάμδα, is… …
24Subliminal message — A subliminal message is a signal or message embedded in another medium, designed to pass below the normal limits of the human mind s perception. These messages are unrecognizable by the conscious mind, but in certain situations can affect the… …
25Telegrapher's equations — The telegrapher s equations (or just telegraph equations) are a pair of linear differential equations which describe the voltage and current on an electrical transmission line with distance and time. The equations come from Oliver Heaviside who… …
26electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
27Physical 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… …
28respiratory disease — ▪ human disease Introduction any of the diseases and disorders that affect human respiration (respiration, human). Diseases of the respiratory system may affect any of the structures and organs that have to do with breathing, including the… …
29Photoconductive atomic force microscopy — (pc AFM) is a scientific technique.. Multi layer photovoltaic cells have gained popularity since mid 1980s.[1] At the time, research was primarily focused on single layer photovoltaic (PV) devices between two electrodes, in which PV properties… …
30Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
