Aq2-Analogue Operator forq2-Analogue Fourier Analysis

An Optical Analogue Fourier Transformer

The design and construction of a simple optical analogue Fourier transform computer is described. The instrument which uses MoirB fringes to form a variable spatial frequency filter is intended to produce approximate spectra from interferograms in about five minutes. Results obtained with the instrument are shown. ime to time a number of analogue Fourier transform computers have been described,...

Digital photography versus analogue photography 1 Running heading: DIGITAL PHOTOGRAPHY VERSUS ANALOGUE PHOTOGRAPHY. Digital versus Analogue Photography: a comparative analysis

Analogue brains

D igital computers and mammalian brains share not only a talent for computation but also a method that favors absolutes. The ones and zeros of a computer are analogous to the all-or-none character of action potentials in the brain. Neurons sum all incoming depolarizing signals until, at a threshold level of depolarization, an action potential fi res along the axon. Now, however, Henrik Alle and...

Analogue Gravity

Analogue gravity is a research programme which investigates analogues of general relativistic gravitational fields within other physical systems, typically but not exclusively condensed matter systems, with the aim of gaining new insights into their corresponding problems. Analogue models of (and for) gravity have a long and distinguished history dating back to the earliest years of general rel...

Analogue Signal Predictor: Frequency-Domain Analysis

Predictors are employed to estimate the future states of a system that have many engineering applications, e.g. speech signal processors, process controllers, simulators of mechanical movements, etc. Common predictors are based on digital methods and consequently need digital processing equipment. In some cases, e.g. prediction on a real time scale and fast control, digital techniques appear ra...