منابع مشابه
Relation between attractive force and keeper surface characteristics of iron-neodymium-boron magnetic attachment systems.
The purpose of this study was to evaluate the influence of heating, cast bonding, and subsequent polishing procedures on attractive force of magnetic attachments. Two magnetic attachment systems with keepers of different chemical compositions (Hicorexslim 3013, 447J1; Magfit EX400, AUM20) were employed. Keepers examined were: (1) untreated; (2) heated; (3) cast-bonded with Ag-Pd alloy; (4) cast...
متن کاملA study on the changes in attractive force of magnetic attachments for overdenture.
PURPOSE Although magnetic attachment is used frequently for overdenture, it is reported that attractive force can be decreased by abrasion and corrosion. The purpose of this study was to establish the clinical basis about considerations and long term prognosis of overdenture using magnetic attachments by investigating the change in attractive force of magnetic attachment applied to the patients...
متن کاملResidual attractive force between superparamagnetic nanoparticles
A superparamagnetic nanoparticle (SPN) is a nanometre-sized piece of a material that would, in bulk, be a permanent magnet. In the SPN the individual atomic spins are aligned via Pauli effects into a single giant moment that has easy orientations set by shape or magnetocrystalline anisotropy. Above a size-dependent blocking temperature Tb(V, τobs) , thermal fluctuations destroy the average mome...
متن کاملNovel attractive force between ions in quantum plasmas.
We report a new attractive force between ions that are shielded by degenerate electrons in quantum plasmas. Specifically, we show that the electric potential around an isolated ion has a hard core negative part that resembles the Lennard-Jones-type potential. Physically, the new electric potential is attributed to the consideration of the quantum statistical pressure and the quantum Bohm potent...
متن کاملA weak, attractive, long-range force in Higgs condensates
Due to the peculiar nature of the underlying medium, density fluctuations in a ‘Higgs condensate’ are predicted to propagate for infinitely long wavelengths with a group velocity cs → ∞. On the other hand, for any large but finite cs there is a weak, attractive 1/r potential of strength 1 cs and the energy spectrum deviates from the purely massive form √ p2 +M2 h at momenta smaller than δ ∼ Mh ...
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ژورنال
عنوان ژورنال: Physical Review (Series I)
سال: 1902
ISSN: 1536-6065
DOI: 10.1103/physrevseriesi.15.233