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[1] [2] [3] Astronauts in orbit have the sensation of being weightless because they are in free fall around the Earth, [4] not because they are so far away from the Earth that its gravitational pull is negligible. For example, on the International Space Station the Earth's gravity is nearly 90% as strong as at the surface. Objects orbiting in ...
Understanding WCF Services in Silverlight 2 Archived 2011-03-12 at the Wayback Machine - In depth explanation of WCF services for Silverlight clients. David Chappell: "Introduction to WCF" and "Dealing with Diversity", two papers covering WCF. November 2007. Getting Started with WCF RIA Services - part 1 of the series articles on WCF RIA Services
y = b 0 + b 1 x + b 2 x 2 + ε, ε ~ 𝒩(0, σ 2) has, nested within it, the linear model y = b 0 + b 1 x + ε, ε ~ 𝒩(0, σ 2) —we constrain the parameter b 2 to equal 0. In both those examples, the first model has a higher dimension than the second model (for the first example, the zero-mean model has dimension 1).
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Popular science (also called pop-science or popsci) is an interpretation of science intended for a general audience. While science journalism focuses on recent scientific developments, popular science is more broad ranging. It may be written by professional science journalists or by scientists themselves.
Edkins' notes on these inventions were mentioned in an 1859 review in the journal Athenaeum, comparing the contemporary science and technology in China and Japan. [34] Other examples include, in Johnson's New Universal Cyclopædia: A Scientific and Popular Treasury of Useful Knowledge in 1880, [ 35 ] The Chautauquan in 1887, [ 36 ] and by the ...
Fine and hyperfine structure in hydrogen (not to scale). This section presents a relatively simple and quantitative description of the spin–orbit interaction for an electron bound to a hydrogen-like atom, up to first order in perturbation theory, using some semiclassical electrodynamics and non-relativistic quantum mechanics.