Varnai, TamasMarshak, AlexanderWen, GuoyongLevy, RobertEck, Thomas2024-02-142024-02-142018-10http://hdl.handle.net/11603/3163026 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domain Mark 1.0Text