We investigate hydrodynamic instability of a steady planar detonation wave propagating in a circular tube to three-dimensional linear perturbations, using the normal mode approach. Spinning instability is identified and its relevance to the well-known spin detonation is discussed. The neutral stability curves in the plane of heat release and activation energy exhibit bifurcations from a low-fre...

Tetrahexahedral Pd nanocrystals (THH Pd NCs) were prepared on a glassy carbon electrode using a programmed square-wave potential electrodeposition method, and modified by Bi adatoms with a range of coverages via the cyclic voltammetry method. The reactivity of the catalysts prepared towards ethanol electrooxidation reaction (EOR) was studied in alkaline medium at various temperatures and under ...

Large negative thermal quenching (NTQ) of the yellow luminescence (YL) for a temperature increase from 5 to 300 K is observed in non-polar InGaN/GaN quantum well (QW) samples due migration carriers InGaN QW layers GaN barrier first time. Such an unusual phenomenon happens only when are optically excited inside layers, providing solid evidence occurrence transfer photoexcited layers. A simple mo...

The physical aging of amorphous polymers induces changes in material properties, which are challenging to detect situ industrial settings. Here, we present a nondestructive nonlinear ultrasonic evaluation technique that enables localized measurements the combined effects temperature and time polymers, without needing remove materials. proposed is demonstrated using commercial grade poly(vinyl c...

Abstract In this work, a heterojunction of Al/p-Si/CoPc/Au was fabricated using the thermal evaporation technique by depositing CoPc on p-Si. Complex impedance spectroscopy employed to investigate characteristics and full band profile measurements heterojunction. Arrhenius fitting double relaxation operations utilized determine activation energy tested device. The studied device gains negative ...

We have studied the electrical resistivity as a function of temperature in Micro-bridges YBa 2 Cu 3 O 7-δ deposited by laser ablation on SrTiO substrate face, around superconducting transition region different magnetic fields. The activation energy U 0 was determined and discussed using Arrhenius relation. irreversibility line B irr upper critical field c2 were obtained 10% 90% criteria normal-...

The temperature behavior of the natural microflora on the Mediterranean fish red mullet (Mullus barbatus) was examined as a case study. The growth of the spoilage bacteria Pseudomonas spp., Shewanella putrefaciens, Brochothrix thermosphacta, and lactic acid bacteria was modeled as a function of temperature and the concentration of carbon dioxide in modified atmosphere packaging. Combined models...