A method for designing a discrete Fourier transform unit in a system on a target device includes identifying a number of DFT engines to implement in the DFT unit in response to a data throughput rate, a clock rate of the system, a size of a DFT, and radix of each of the DFT engines. The substrate for an OED may form an organic electronic system having excellent performances including light extraction efficiency. A multitude of spatially resolved spectra of transmitted, reflected, emitted or scattered near infrared wavelength radiation light from the illuminated area of the sample is collected and a collimated beam is produced therefrom. A method for the determination of water content by means of Karl Fischer coulometric titration in a diaphragm-free cell, whereby the Karl Fischer reagent is used, and the coulometric titration is carried out in a diaphragm-free cell. The content server transmits the content data onto the determined optimal communications circuit within the determined transmission timing.