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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 ...
V-mail. V-mail, short for Victory Mail, was a hybrid mail process used by the United States during the Second World War as the primary and secure method to correspond with soldiers stationed abroad. To reduce the cost of transferring an original letter through the military postal system, a V-mail letter would be censored, copied to film, and ...
Delta Sigma Theta. Delta Sigma Theta Sorority, Inc. (ΔΣΘ) is a historically African American sorority. The organization was founded by college-educated women dedicated to public service with an emphasis on programs that assist the African American community. Delta Sigma Theta was founded on January 13, 1913 by twenty-two women at Howard ...
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Undergraduate chapter statistics. Since 1899, Delta Sigma Phi has issued 238 charters in 41 states (United States of America), Washington, D.C., and 3 provinces in Canada. Currently, the Fraternity has active chapters and new chapters in 32 states and Washington, D.C. All three former chapters in Canada are dormant.
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Below is a list of Delta Sigma Theta (ΔΣΘ) members, commonly referred to as Deltas. The sorority was founded on January 13, 1913, at Howard University [1] and was first incorporated in Washington, D.C., on February 9, 1913. [2] Its graduate chapters are named according to geographic location and "Alumnae" annexed to the service area's name. [3]