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The coordinate-independent definition of the square of the line element ds in an n-dimensional Riemannian or Pseudo Riemannian manifold (in physics usually a Lorentzian manifold) is the "square of the length" of an infinitesimal displacement [2] (in pseudo Riemannian manifolds possibly negative) whose square root should be used for computing curve length: = = (,) where g is the metric tensor ...
Digital intelligence or digital intelligence quotient (DQ) has been defined as "a comprehensive set of technical, cognitive, meta-cognitive, and socio-emotional competencies that are grounded in universal moral values and that enable individuals to face the challenges and harness the opportunities of digital life" by DQ Institute. [1]
Ewald summation, named after Paul Peter Ewald, is a method for computing long-range interactions (e.g. electrostatic interactions) in periodic systems.It was first developed as the method for calculating the electrostatic energies of ionic crystals, and is now commonly used for calculating long-range interactions in computational chemistry.
Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal nĚ‚, d is the dipole moment between two point charges, the volume density of these is the polarization density P.
From January 2008 to December 2012, if you bought shares in companies when William P. Fricks joined the board, and sold them when he left, you would have a -21.9 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
The U.S. Fish and Wildlife Service is pushing for added protections for the monarch butterfly after suggesting multiple populations could go extinct in mere decades.
Wall Street closed Thursday in about the same shape, with the blue-chip Dow managing to eke out a small gain to snap a 10-day losing streak, the longest in 50 years. The Dow ended up 0.4%, or 15. ...
In 2024, the wide, wide world of sports saw repeat champions, first-time titlists, a grand Paris summer and some epic fails. The winners and losers: