We study the Aharonov-Bohm effect under the conditions of the Tonomura et al. experiments and we give the first rigorous proof that the classical Ansatz of Aharonov and Bohm is a good approximation to the exact solution of the Schrödinger equation. In remarkable experiments, Tonomura et al. enclosed a magnetic flux in the interior of a toroidal magnet and they superimposed behind the magnet an ...

in the permanent magnet linear synchronous motor (pmlsm), force ripple is harmful, useless and disturbing. the force ripple is basically composed of two components: detent force and mutual force ripple. this force is influenced by the geometric parameters of the permanent magnet (pm) motors; such as width, thickness and length of the magnet poles, length and thickness of the rotor and stator, a...

the use of magnetic fields in targeted drug delivery, especially for treatment of cancers and tumoral regions, is one of the significant techniques in the field of modern methods of treatment. considering that many vital biological tissues have been located deep in the body, then for targeted drug delivery and effective treatment in these tissues, it is required to bring therapeutic agent to th...

This Brief is a distillation of a report on a major research study comparing graduates of career magnet programs to graduates of comprehensive high schools in a large metropolitan area. The career magnet programs we studied are located either within regular comprehensive high schools or combined with other magnet programs to fill up an entire building. Many of our conclusions are based on compa...

PURPOSE/OBJECTIVES To examine practice environments and outcomes of nurses working in oncology units or Magnet hospitals and to understand the association between the two. DESIGN Secondary analysis of survey data collected in 1998. SETTING Medical and surgical units of 22 hospitals, of which 7 were recognized by the American Nurses Credentialing Center Magnet program. SAMPLE 1,956 RNs, of...

We compared 6 adult mosquito traps for effectiveness in collecting Aedes albopictus from suburban backyards with the goal of finding a more suitable surveillance replacement for the Centers for Disease Control and Prevention (CDC) light trap. Trap selection included 2 commercial propane traps (Mosquito Magnet Professional trap and Mosquito Magnet Liberty trap), 2 Aedes-specific traps (Fay-Princ...

Electromagnetic field analyses were carried out to study the influence of coated-conductor magnetisation, i.e. the screening (shielding) current, on the field quality of a dipole magnet in a rotating gantry for hadron cancer therapy. The analyses were made on the cross section of a cosine-theta dipole magnet in a rotating gantry for carbon ions, which generated 2.90 T of magnetic field. The tem...

The next generation of particle accelerators will be one-of-a-kind facilities, and to meet their luminosity goals they must have guaranteed availability over their several decade lifetimes. The Next Linear Collider (NLC) is one viable option for a 1 TeV electronpositron linear collider, it has an 85% overall availability goal. We previously showed how a traditional Failure Modes and Effects Ana...