Making internal fixation work with limited bone stock

Fractures are common in small animal practice and there are many options for managing them. Plates and screws remain a popular means to manage many fractures; however, some fractures are sufficiently close to a joint (juxta-articular), that they limit the amount of bone available to achieve a standard stable plate and screw fixation. This article discusses the options to achieve a stable internal fixation when there is limited bone stock

Signals for Lorentz Violation in Electrodynamics

An investigation is performed of the Lorentz-violating electrodynamics extracted from the renormalizable sector of the general Lorentz- and CPT-violating standard-model extension. Among the unconventional properties of radiation arising from Lorentz violation is birefringence of the vacuum. Limits on the dispersion of light produced by galactic and extragalactic objects provide bounds of 3 x 10^{-16} on certain coefficients for Lorentz violation in the photon sector. The comparative spectral polarimetry of light from cosmologically distant sources yields stringent constraints of 2 x 10^{-32}. All remaining coefficients in the photon sector are measurable in high-sensitivity tests involving cavity-stabilized oscillators. Experimental configurations in Earth- and space-based laboratories are considered that involve optical or microwave cavities and that could be implemented using existing technology.Comment: 23 pages REVTe