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2. Delta modulation - Wikipedia

   en.wikipedia.org/wiki/Delta_modulation

   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 ...

3. Delta baryon - Wikipedia

   en.wikipedia.org/wiki/Delta_baryon

   Δ−. (ddd), which respectively carry an electric charge of +2 e, +1 e, 0 e, and −1 e . The Δ baryons have a mass of about 1 232 MeV/c2; their third component of isospin and they are required to have an intrinsic spin of 3 2 or higher (half-integer units). Ordinary nucleons (symbol N, meaning either a proton or neutron ), by contrast, have ...

4. Mississippi River Delta - Wikipedia

   en.wikipedia.org/wiki/Mississippi_River_Delta

   2001 Image of the active delta front before Hurricanes Katrina and Rita destroyed much of the delta in 2005. The Mississippi River Delta is the confluence of the Mississippi River with the Gulf of Mexico in Louisiana, southeastern United States. The river delta is a three-million-acre (4,700 sq mi; 12,000 km 2) area of land that stretches from ...

5. Delta Sigma Theta - Wikipedia

   en.wikipedia.org/wiki/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 University in ...

6. Depth perception - Wikipedia

   en.wikipedia.org/wiki/Depth_perception

   Depth perception. Perspective, relative size, occultation and texture gradients all contribute to the three-dimensional appearance of this photo. Depth perception is the ability to perceive distance to objects in the world using the visual system and visual perception. It is a major factor in perceiving the world in three dimensions.

7. Fovea centralis - Wikipedia

   en.wikipedia.org/wiki/Fovea_centralis

   The fovea centralis is a small, central pit composed of closely packed cones in the eye. It is located in the center of the macula lutea of the retina. [1] [2] The fovea is responsible for sharp central vision (also called foveal vision), which is necessary in humans for activities for which visual detail is of primary importance, such as ...

8. Delta potential - Wikipedia

   en.wikipedia.org/wiki/Delta_potential

   Single delta potential. The time-independent Schrödinger equation for the wave function ψ(x) of a particle in one dimension in a potential V(x) is. where ħ is the reduced Planck constant, and E is the energy of the particle. The delta potential is the potential. where δ(x) is the Dirac delta function. It is called a delta potential well if ...

9. Delta method - Wikipedia

   en.wikipedia.org/wiki/Delta_method

   Delta method. In statistics, the delta method is a method of deriving the asymptotic distribution of a random variable. It is applicable when the random variable being considered can be defined as a differentiable function of a random variable which is asymptotically Gaussian .