Muffin-tin approximation Muffin-tin approximation The muffin-tin approximation is a shape approximation of the potential well in an crystal lattice. It is most commonly employed in quantum mechanical simulations of the electronic band structure in solids. The approximation was proposed by John C. Slater. Augmented plane wave method (APW) is a method which uses muffin-tin approximation. It is a method to approximate the energy states of an electron in a crystal lattice. The basic approximation lies in the potential in which the potential is assumed to be spherically symmetric in the muffin-tin region and constant in the interstitial region. Wave functions (the augmented
Happy Anniversary (1959 film) Happy Anniversary (1959 film) Happy Anniversary is a 1959 picture starring David Niven and Mitzi Gaynor. Directed by David Miller, the movie's cast also included Carl Reiner and a young Patty Duke. Duke's next film, "The Miracle Worker", would earn her an Academy Award. Chris Walters is a happily married father of two. For his 13th wedding anniversary, he sneaks home with a gift for wife Alice, a diamond brooch, and with a desire to have a romantic interlude. Interruptions ensue. If it isn't their children, Debbie, and Okkie, needing something, it's their maid, Millie, or it's Alice's mother, Lilly,