14,568 research outputs found
Quantum Mechanics and Motion: A Modern Perspective
This essay is an attempted to address, from a modern perspective, the motion
of a particle. Quantum mechanically, motion consists of a series of
localizations due to repeated interactions that, taken close to the limit of
the continuum, yields a world-line. If a force acts on the particle, its
probability distribution is accordingly modified. This must also be true for
macroscopic objects, although now the description is far more complicated by
the structure of matter and associated surface physics.Comment: 17 pages, 3 figure
Trailer shield assembly for a welding torch
This invention relates generally to trailer shields for gas shielded arc welding torches, and more particularly to a trailer shield assembly provided with a shield gas manifold for providing an even dispersion of shield gas to the interior of the shield assembly, which generally encloses a joint being welded and a welding trailing portion of hot welded metal. The novelty of the invention lies in providing trailer shield with a manifold tube having a plurality of openings from which shield gas is distributed. A gas manifold region ahead of the torch is also provided with shield gas from a tube to protect metal preheated by the torch. Further novelty lies in constructing portions of sides and housing and portions of side walls of the guide of stainless steel screen having a tight mesh
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