I present evidence on the nature of object coding in the brain and discuss the implications of this coding for models of visual selective attention. Neuropsychological studies of task-based constraints on: (i) visual neglect; and (ii) reading and counting, reveal the existence of parallel forms of spatial representation for objects: within-object representations, where elements are coded as par...

This mixed method study compared mathematics achievement in two third-grade classrooms using two different representations: virtual manipulatives which has dual codes of visual and symbolic representations, and physical manipulatives for instruction in fraction addition and balancing algebraic equations. The research employed a within-subjects crossover repeated measures design, administered pr...

We recently proposed a specific model whereby miRNAs encoded from short nonautonomous DNA-type TEs known as MITEs evolved from corresponding ancestral full-length (autonomous) elements that originally encoded short interfering (siRNAs). Our miRNA-origins model predicts that evolutionary intermediates may exist as TEs that encode both siRNAs and miRNAs, and we analyzed Arabidopsis thaliana and O...

Small nucleolar RNAs (snoRNAs) are an ancient class of small non-coding RNAs present in all eukaryotes and a subset of archaea that carry out a fundamental role in the modification and processing of ribosomal RNA. In recent years, however, a large proportion of snoRNAs have been found to be further processed into smaller molecules, some of which display different functionality. In parallel, sev...

The thesis determines the optimal policy (out of successive decoding and FDMA) that minimizes the sum power of the users in the presence of coding gap while meeting their minimum rate requirements in a time-varying channel for the uplink setup. It is shown that, in the presence of coding gap, successive decoding is no longer an optimal policy in all channel states and that there are certain cha...

Since the RNA world hypothesis was proposed, a large number of regulatory noncoding RNAs (ncRNAs) have been identified in many species, ranging from microorganisms to mammals. During the characterization of these newly discovered RNAs, RNAs having both coding and noncoding functions were discovered, and these were considered bifunctional RNAs. The recent use of computational and high-throughput...