A new class of giant resonances in nuclei, namely double giant resonances, is discussed. They are giant resonances built on top of other giant resonances. Investigation on their properties, together with similar studies on low-lying two-phonon states, should give an answer on how far the harmonic picture of boson-type excitations holds in the finite fermion systems like atomic nuclei. The main ...

Arabidopsis thaliana carboxyl-terminal domain (CTD) phosphatase-like 1 (CPL1) is a protein that regulates plant transcriptional responses to diverse stress signals. Unlike prototypical CTD phosphatases, which contain a phospho-peptide-binding Breast Cancer 1 C-terminal (BRCT) domain, CPL1 contains 2 double-stranded RNA binding motifs (dsRBM) at its C-terminus. While some dsRBMs can bind to dsRN...

It has been known for many years that a nonlinear phase shift can occur with non-phase-matched second-harmonic generation in particular and with parametric processes in general.1·2 Frequently it is an undesirable factor that leads to instabilities in parametric oscillators. Such a nonlinear phase shift has been measured experimentally in bulk KTP at 1.06 11-m with Z-scan techniques, 3 which mea...

Mobile phone is the most widely used mobile device. Every mobile phone user can conveniently communicate with each other through SMS (Short Message Service) text messages at very low price. It is so commonly used that, in some countries like China, an SMS culture has emerged. Although there are some SMS based applications in m-Learning, most of them are only for administrative purposes, like de...

A concept of multistep cascading is applied to the problem of fourth-harmonic generation (FHG) in a single quadratic crystal, and a new model of parametric wave mixing is analyzed in detail. Important applications to the optical frequency division and efficient FHG as well as the realization of the double-phase-matching multistep cascading processes in engineered QPM structures with phase-rever...

Some of the major scientific achievements in Sub-Saharan Africa resulting from CGIAR work have been realized in the areas of biocontrol and the development of improved plant varieties. Of particular note has been the development of the new rices for Africa (NERICAs) through anther culture, the development of quality protein maize (QPM) as well as the effective control of the cassava mealybug. T...