0031-9007= The low-energy reaction 14C n; 15C provides a rare opportunity to test indirect methods for the determination of neutron capture cross sections by radioactive isotopes versus direct measurements. It is also important for various astrophysical scenarios. Currently, puzzling disagreements exist between the 14C n; 15C cross sections measured directly, determined indirectly, and calculat...

Efforts to unify group-theoretically the standard-model gauge interactions with the generation structure of fermions and their mirror partners should be accompanied with the unification of the corresponding gauge couplings. In this paper the possibility of such a unification is studied and conclusions on possible symmetry-breaking channels and scales, as well as on the fermion content of the th...

Ron Oliver is a Senior Lecture( in the Deparlnent of Library and lnfomatton Sctence at Edith Cowan Univercity, He teaches in the prc.setvice teacher education program at the Univercity. He cootdtnates the secondary teachet computet education Wogram. He is actively tnvolved in school-based research and has a paqiculat nterest in the outcones of lT programs n schools. He $ curcntly nvalved in a p...

This note discusses proofs for convergence of first-order methods based on simple potentialfunction arguments. We cover methods like gradient descent (for both smooth and non-smooth settings), mirror descent, and some accelerated variants.

This paper discusses optical beam control using adaptive optics for imaging spacecraft with large aperture telescopes. The segmented mirror alignment and active mirror surface control are achieved by novel wavefront sensing and control techniques. The experimental testbed and test results are also presented to demonstrate the adaptive optics techniques for large-aperture segmented mirrors.