We investigate the effects of an electric current on the width of a stationary reaction zone in an irreversible A(-)+B(+)-->C reaction-diffusion process. The ion dynamics of electrolytes A identical with (A(+),A(-)) and B identical with (B(+),B(-)) is described by reaction-diffusion equations obeying local electroneutrality and the stationary state is obtained by employing reservoirs of fixed e...

A model for heat-recirculating micro combustor is developed. It investigates the structure of laminar, one-dimensional and steady state flame propagation in uniformly premixed wood particles with considering the effects of heat recirculation caused by configuration of micro combustor. The flame structure is divided into three regions: a preheat-devolatilization zone where the rate of the gas-ph...

The mathematical model proposed by Chapman and Antano (Electrochimica Acta, 56 (2010), 128–132) for the catalytic electrochemical–chemical (EC’) processes in an irreversible second-order homogeneous reaction a microelectrode is discussed. mass-transfer boundary layer neighbouring electrode can contribute to electrode’s measured AC impedance. This be used analyse membrane-transport studies other...

Surface composite layers were successfully fabricated on an A 1050-H24 aluminum plate by dispersed iron (Fe) and magnetite (Fe₃O₄) particles through friction stir processing (FSP). Fe and Fe₃O₄ powders were packed into a groove of 3 mm in width and 1.5 mm in depth, cut on the aluminum plate, and covered with an aluminum sheet that was 2-mm thick. A friction stir processing (FSP) tool of square ...

A numerical investigation of the structure of hydrogen/air partially premixed 'ames (PPFs) in a counter'ow con4guration is reported. The partially premixed 'ame structure is characterized by two spatially distinct reaction zones. Unlike hydrocarbon/air PPFs, the fuel is partially consumed in the rich premixed zone, where H, O, and OH are the major intermediate species, with the remaining fuel b...

Corticocortical pathways can be classified as feedback and feedforward, in part according to the laminar distribution of the parent cell bodies. Here, we have developed exhaustive sampling procedures to determine unambiguously this laminar distribution. This shows that individual extrastriate areas in the adult cat have highly stereotyped proportions of supragranular layer neurons with respect ...

During development of the neocortex, the marginal zone (layer I) and the subplate (layer VII) are the first layers to form from a primordial plexiform neoropil. The cortical plate (layers II-VI) is subsequently established between these superficial and deep components of the primordial plexiform neuropil. Neurons in the early zones are thought to play important roles in the formation of the cor...

In thin-layered reservoirs, drilling engineers face tough challenges—planning their drilling programs to follow the most productive reservoir layers while avoiding nearby water, gas or high-pressure zones. The rewards for a successful drilling strategy are clear—increased oil production and reduced water cut. In an oil field in the Persian Gulf, for example, oil production was increased four- t...