In this Letter we show that, in spectral regions where there are no orbital cladding resonances to cause transmission loss, the core mode of a continuously twisted photonic crystal fiber (PCF) exhibits optical activity, and that the magnitude of the associated circular birefringence increases linearly with twist rate and is highly reproducible. In contrast to previous work on twist-induced circ...

A new chiral open-framework cobalt phosphite [C6N2H14][Co(HPO3)2] (1) with helical channels has been synthesized under solvothermal conditions in the presence of achiral organic amine. The circular dichroism (CD) spectrum indicates that the bulk crystals have optical activity. Magnetic measurements reveal that 1 is a weak ferromagnet.

Software GPS receiver results are presented for an overland, passive altimeter application utilizing GPS signals. The flight data were collected using a DC-3 aircraft operated by Ohio University. The flight took place over southeast Ohio, where the terrain is hilly and forested. The GPS receiver on board the aircraft contains two channels. One channel has a right-hand-circular-

The implementation of a null-steering antenna array using dual polarised patch antennas is considered. Several optimality criterion for adjusting the array weights are discussed. The most effective criteria minimises the output power of the array subject to maintaining a right hand circular polarisation (RHCP) response on the reference antenna. An unconstrained form of this criteria is derived,...

A shape-persistent alleno-acetylenic macrocycle, peripherally decorated with eight phenolic rings, has been synthesized in enantiomerically pure form. Its electronic circular dichroism spectrum features a strong chiroptical response. In the solid state, the macrocycle stacks in pillars to form channels and the stacks undergo further self-assembly into a three-dimensional porous architecture thr...

Recording simultaneously in vitro the changes of endoluminal pressure (index of circular muscle activity) and isometric tension (index of longitudinal muscle activity), we examined the mechanisms responsible for the apamin-sensitive relaxant and contractile responses induced by protease-activated receptor (PAR)-1 and PAR-2 activating peptides, SFLLRN-NH2 and SLIGRL-NH2, respectively, in rat col...