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Electron spin is a key consideration for the function of organic semiconductors in light-emitting diodes and solar cells, as well as spintronic applications relying on organic magnetoresistance. A mechanism for triplet excited state generation in such systems is by recombination of electron-hole pairs. However, the exact charge recombination mechanism,(More)
Parasite removal by cleaner fish provides significant health benefits to a variety of coral reef fish, particularly roving carnivores and herbivores (Grutter et al. 2003). For grey reef sharks (Carcharhinus amblyrhynchos), however, such cleaning events are only known to occur sporadically, on exposed oceanic reefs (O'Shea et al. 2010). This is because hosts(More)
We describe an experimental realization of stochastic resonance in two-dimensional arrays of coupled nonlinear oscillators. The experiment is implemented using an optoelectronic system composed of a liquid crystal light valve in a feedback loop with external, spatially variable noise being added through a liquid crystal display. The behavior of the system(More)
A procedure is described for the fabrication of an extraoral prosthesis with an acrylic resin substructure that retains a magnet sealed from the environment by a polyurethane liner. Velcro is used to enhance the bond of the acrylic substructure to the silicone prosthesis. This procedure results in improved retention of the acrylic resin substructure and(More)
Optimization of the energy levels at the donor-acceptor interface of organic solar cells has driven their efficiencies to above 10%. However, further improvements towards efficiencies comparable with inorganic solar cells remain challenging because of high recombination losses, which empirically limit the open-circuit voltage (Voc) to typically less than 1(More)
We study experimentally, analytically and numerically the backward-wave propagation, and the formation of discrete bright and dark solitons in a nonlinear electrical lattice. The latter is structured by a series diode and a shunt inductor per unit cell, so that it mimics a purely left-handed nonlinear transmission line. We observe experimentally that a(More)
The use of bone-anchored hearing aids is not possible for all patients who wear an implant-retained auricular prosthesis. For some patients, the external ear canal cannot be occluded with a conventional hearing device. Currently manufactured hearing aids may not readily fit the contours of an implant-retained auricular prosthesis. This article describes a(More)
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