Astyanax douradilho, new species, is described from the rio Tramandaí system, coastal drainage of Rio Grande do Sul State, Brazil. The new species is distinguished from its congeners by possessing 37-39 perforated scales along the lateral line, 3-5 maxillary tricuspid teeth, 22-24 branched anal-fin rays, absence of a conspicuous dark stripe from humeral region to caudal peduncle, two vertically...

In this study, the frozen stress photoelastic method was used to investigate the three-dimensional effect on the crack growth behavior in a centrally perforated circular cylinder under internal pressure. The inner surface of the cylinder had a star shape, which consisted of six fins. The specimens were capped at the ends and pressurized internally above critical temperature after real cracks we...

A new bariline fish, Barilius kamjongensis is decribed from Kamjong district, the Chindwin basin of Manipur, India. It can be distinguished its congeners in having a body with 2 pairs barbels, 16–19 predorsal scales, 12–15 bars, 40–43 perforated lateral line 7.5/2.5 transverse origin dorsal-fin closed to base caudal-fin, pectoral-fin shorter than head length, depth at 22.8–26.6 % SL, caudal ped...

Heat sink or heat exchanger is a passive cooling device used in electronic components to prolong their longevity, performance and reliability. All utilize current for the operational purposes thus become prone sharp increase temperature. The generated above operating level becomes critical in-terms of failure component hence, appropriate thermal management demands come into act. Finned extended...

in this work, laser bending of perforated sheets has been investigated numerically. laser bending of perforated sheets is more complicated than non-perforated sheets due to their complex geometries. in this paper, laser bending of perforated sheets is studied numerically in the form of thermo-mechanical analysis with abaqus/implicit code. for this purpose, the effects of process and sheet param...

This study focuses on perforated pin fin convection heat transfer. study's goal is to see if fins may help transmit heat. Perforation diameter and hole count are evaluated each pin. The Nusselt number of pins 47% higher than solid pins, it increases with perforation count. Unperforated have a 19% lower pressure drop. Using circular holes as sinks, we examined forced There were perforations. The...