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Satellite imaging of Cartí Sugtupu, Panama in 2022, showing rising sea levels submerging the island and forcing hundreds of indigenous Guna people to relocate.. This article lists several areas, regions, and municipalities that have either been completely or markedly depopulated, or are involved in plans for depopulation or relocation due to anthropogenic climate change.
Delta modulation (DM or Δ-modulation) is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information where quality is not of primary importance. DM is the simplest form of differential pulse-code modulation (DPCM) where the difference between successive samples is encoded into n-bit data ...
Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal.In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse-code modulation (PCM); rather, the relative density of the pulses corresponds to the analog signal's amplitude.
Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is an oversampling method for encoding signals into low bit depth digital signals at a very high sample-frequency as part of the process of delta-sigma analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). Delta-sigma modulation achieves high quality by utilizing a ...
Dynamic modulus. Dynamic modulus (sometimes complex modulus[1]) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation). It is a property of viscoelastic materials.
The first true performance-oriented Delta was the Delta HF, which was introduced in July 1983 and went on sale in September [18] after a first appearance at the Frankfurt Motor Show. [19] The HF acronym—last used on the Stratos —stands for "high fidelity", and had been applied to sports and racing variants of Lancia cars since 1966. [ 20 ]
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