The Matuyama-Gauss (M-G) magnetic polarity reversal is regarded as a fundamental time marker in the stratigraphic division of Quaternary-Neogene. However, previous paleomagnetic studies have shown that M-G mainly recorded Chinese loess unit L33—a glacial stage (corresponding to marine isotope 104, i.e., MIS 104)—which asynchronous with timing sediments. Here, we solve this long-standing debate ...

Perceptual transparency requires local same-polarity X-junctions, which can also be generated by temporal integration under natural dynamic conditions. In this study, segmentation performance and target appearance were measured for a uniform gray target embedded in a random-dot frame presented with a temporally adjacent mask. Although static cues for both segmentation and transparency were unav...

This paper presents a study of the relationship between Electrical Discharge Machining (EDM) parameters on the EDM efficiency factors using a full factorial design, based on pulse on-time, duty cycle and tool polarity parameters in EDM machining of AISI H13 tool steel. The results show that, in positive polarity, the plasma flushing efficiency and pulse efficiency increase according to the puls...

1. In Bryophyllum calycinum two apical leaves suppress the shoot formation in all the dormant buds situated basally from the leaf; one apical leaf suppresses the shoot formation in the basal buds situated in the same half of the stem where the leaf is, and, if one-half of the petiole of such a leaf is removed, the growth of basal buds in one quadrant of the stem is suppressed. 2. This inhibitor...

Recent advances in a number of systems suggest many genes involved in orchestrating regeneration are redeployed from similar processes in development, with others being novel to the regeneration process in particular lineages. Of particular importance will be understanding the architecture of regenerative genetic regulatory networks and whether they are conserved across broad phylogenetic dista...

Alejandro Sánchez Alvarado?s laboratory group has employed molecular tools to investigate old questions about regeneration and as a result have identified some of the molecular mechanisms determining polarity [4]. Recent work by his group has shown Wnt-?-catenin signaling determines whether a tail or a head will form during regeneration in planarians. This study was motivated by work Thomas Hun...