ÐThe present review provides an overview of the distribution of dopaminergic ®bers and dopaminoceptive elements within the avian telencephalon, the possible interactions of dopamine (DA) with other biochemically identi®ed systems as revealed by immunocytochemistry, and the involvement of DA in behavioral processes in birds. Primary sensory structures are largely devoid of dopaminergic ®bers, DA...

The macroscopic response of hyperelastic fi ber composites is characterized in terms of the behaviors of their constituting phases. To this end, we make use of a unique representation of the deformation gradient in terms of a set of transversely isotropic invariants. Respectively, these invariants correspond to extension along the fi bers, transverse dilatation, out-of-plane shear along the fi ...

Let h(a1 , •.. , an) denote the harmonic mean n(a1 1 + ... +a; 1) -1 of positive num­ bers a1 , ••. , all' and extend this definition (by continuity) to the non-negative case by setting h(a l' ... , an) = 0 if ai = 0 for some i ~ n. Recall that a measure J1. is non-atomic if every measurable set A of strictly positive measure has a measur­ able subset B ~ A satisfying J1.(A) > J1.(B) > O. A mea...

We show cusps are dense in Bers' boundary for Teichm uller space. The proof rests on an estimate for the algebraic eeect of a unit quasiconformal deformation supported in the thin part of a hyperbolic Riemann surface.

Somatosensory evoked potentials (SEPs) are the electrical potentials generated in sensory pathways at peripheral, spinal, subcortical and cortical levels of the nervous system. SEPs can be elicited from almost any nerve, although the median and posterior tibial nerves are usually chosen in clinical practice. Recently up-dated reviews on SEP recording, normal waveforms, normative data and clinic...

ÐMetal matrix composites (MMCs) can be synthesized by aligning metal coated ceramic ®bers in a shaped container and applying pressure at elevated temperatures. The high stresses created at the contacts between neighboring ®bers cause inelastic matrix ̄ow that ®lls inter®ber voids, reduces inter®ber separations and results in composite densi®cation. The rate of densi®cation depends on the contac...

In security games, the solution concept commonly used is that of a Stackelberg equilibrium where the defender gets to commit to a mixed strategy. The motivation for this is that the attacker can repeatedly observe the defender’s actions and learn her distribution over actions, before acting himself. If the actions were not observable, Nash (or perhaps correlated) equilibrium would arguably be a...

Research on heuristic functions is all about estimating the length (or cost) of solution paths. But what if there is no such path? Many known heuristics have the ability to detect (some) unsolvable states, but that ability has always been treated as a by-product. No attempt has been made to design heuristics specifically for that purpose, where there is no need to preserve distances. As a case ...