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PSD is usually defined by the method by which it is determined. The most easily understood method of determination is sieve analysis, where powder is separated on sieves of different sizes. Thus, the PSD is defined in terms of discrete size ranges: e.g. "% of sample between 45 μm and 53 μm", when sieves of these sizes are used.
Differential Manchester encoding (DM) is a line code in digital frequency modulation in which data and clock signals are combined to form a single two-level self-synchronizing data stream. Each data bit is encoded by a presence or absence of signal level transition in the middle of the bit period, followed by the mandatory level transition at ...
Abbreviation Term Description (notes) AH Asteroid hyalosis AMD/ARMD Age-related macular degeneration ACG/CAG Angle closure glaucoma BDR Background diabetic retinopathy
2-D tetra-lateral position sensitive device (PSD) A 2-D tetra-lateral PSD is capable of providing continuous position measurement of the incident light spot in 2-D. It consists of a single square PIN diode with a resistive layer. When there is an incident light on the active area of the sensor, photocurrents are generated and collected from ...
More commonly used is the power spectral density (PSD, or simply power spectrum), which applies to signals existing over all time, or over a time period large enough (especially in relation to the duration of a measurement) that it could as well have been over an infinite time interval. The PSD then refers to the spectral energy distribution ...
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The "DM" headstamp was used by DWM until the early 20th century, perhaps after using up all the old DM cases and headstamp bunters in stock. DWM Deutsche Waffen und Munitionsfabriken (1896–1945) – Berlin-Borsigwalde, Germany. Between 1922 and 1936 the company is briefly renamed Berlin-Karlsruher Industrie-Werke AG (BERKA). It secretly ...
The Social Democratic Party (Portuguese: Partido Social Democrático, PSD) is a political party in Brazil led by Gilberto Kassab and uniting dissidents from various political parties, especially the Democrats, Brazilian Social Democracy Party and Party of National Mobilization.
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