Type crossings
Author | : Theodore Drange |
Publisher | : Walter de Gruyter GmbH & Co KG |
Total Pages | : 220 |
Release | : 2018-11-05 |
Genre | : Language Arts & Disciplines |
ISBN | : 3111352870 |
No detailed description available for "Type crossings".
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Author | : Theodore Drange |
Publisher | : Walter de Gruyter GmbH & Co KG |
Total Pages | : 220 |
Release | : 2018-11-05 |
Genre | : Language Arts & Disciplines |
ISBN | : 3111352870 |
No detailed description available for "Type crossings".
Author | : George Allan Hagedorn |
Publisher | : American Mathematical Soc. |
Total Pages | : 142 |
Release | : 1994 |
Genre | : Mathematics |
ISBN | : 0821826050 |
The principal results of this paper involve the extension of the time-dependent Born-Oppenheimer approximation to accommodate the propagation of nuclei through generic, minimal multiplicity electron energy level crossings. The Born-Oppenheimer approximation breaks down at electron energy level crossings, which are prevalent in molecular systems. We classify generic, minimal multiplicity level crossings and derives a normal form for the electron Hamiltonian near each type of crossing. We then extend the time-dependent Born-Oppenheimer approximation to accommodate the propagation of nuclei through each type of electron energy level crossing.
Author | : United States. Federal Railroad Administration. Office of Safety |
Publisher | : |
Total Pages | : 132 |
Release | : 1975 |
Genre | : Railroad crossings |
ISBN | : |
Author | : United States. Bureau of Railroad Safety |
Publisher | : |
Total Pages | : 514 |
Release | : 1959 |
Genre | : Railroads |
ISBN | : |
Author | : United States. Federal Railroad Administration. Office of Safety |
Publisher | : |
Total Pages | : 1570 |
Release | : 1934 |
Genre | : Railroads |
ISBN | : |
Author | : Hoy A. Richards |
Publisher | : Transportation Research Board |
Total Pages | : 68 |
Release | : 1998 |
Genre | : Technology & Engineering |
ISBN | : 9780309061063 |
This synthesis will be of interest to state and local highway personnel who are responsible for the design, construction, and maintenance of road surfaces and to railroad personnel with similar responsibilities associated with highway-rail grade crossings. It will also be of interest to manufacturers and suppliers of pavement and track materials for crossings. It presents information on the current practices related to highway-rail grade crossing surfaces, including the design and selection of crossing surface materials. This report of the Transportation Research Board describes the various types of highway- rail crossing surfaces, and the issues related to design, operation, and maintenance. Design elements include intersection geometry; drainage; special users, such as bicyclists; and descriptions of failures and their causes. Information is presented on crossing material selection factors, including life-cycle costs and on state practices in selection. Funding issues are also discussed.
Author | : United States. Federal Railroad Administration. Office of Safety |
Publisher | : |
Total Pages | : 424 |
Release | : 1978 |
Genre | : Railroad crossings |
ISBN | : |
Author | : Thomas Fiedler |
Publisher | : World Scientific |
Total Pages | : 341 |
Release | : 2023-01-04 |
Genre | : Mathematics |
ISBN | : 9811263019 |
One-Cocycles and Knot Invariants is about classical knots, i.e., smooth oriented knots in 3-space. It introduces discrete combinatorial analysis in knot theory in order to solve a global tetrahedron equation. This new technique is then used to construct combinatorial 1-cocycles in a certain moduli space of knot diagrams. The construction of the moduli space makes use of the meridian and the longitude of the knot. The combinatorial 1-cocycles are therefore lifts of the well-known Conway polynomial of knots, and they can be calculated in polynomial time. The 1-cocycles can distinguish loops consisting of knot diagrams in the moduli space up to homology. They give knot invariants when they are evaluated on canonical loops in the connected components of the moduli space. They are a first candidate for numerical knot invariants which can perhaps distinguish the orientation of knots.