The limited sensitivity of existing analysis techniques at the nanometer scale makes it challenging to systematically examine complex interactions in redox-based resistive random access memory (ReRAM) devices. To test models oxygen movement ReRAM devices beyond what has previously been possible, we present a new nanoscale method. Harnessing power secondary ion mass spectrometry, most sensitive ...

The porosity of a material can be determined using a diversity of methods; however, the results from these methods have so far not been compared and analyzed for calcium phosphate cements (CPCs). The aim of this study was to compare a fast and easy method for porosity measurements with some commonly used porosity methods for CPCs. The investigated method is based on the assumption that when a w...

A detailed study aimed at understanding the structural, interfacial, and electrochemical performance stability of La0.3Ca0.7Fe0.7Cr0.3O3-δ (LCFCr) electrode material for application as oxygen in reversible solid oxide cells (RSOCs) is presented. Specifically, emphasis placed on LCFCr during evolution (electrolysis mode), whereby many known materials are to fail due delamination. The porous micr...

Previous investigations on porous Li(Ni x Co y Mn z )O 2 (NCM) particles with shortened diffusion paths and an enlarged interface between active material electrolyte show improved rate capability cycle stability compared to compact particles. Due the additional intragranular porosity of material, also pore structure overall electrode, as consequence, ionic transport in phase is altered. In addi...

Porous carbon materials are promising electrocatalysts for the oxygen reduction reaction (ORR). Their active sites, involving porosity and surface chemistry, different from those of metal-doped carbons. The latter have been widely studied adapted to today's popular electrochemical devices, rotating disk electrode being most useful preliminary tool evaluate their activity in ORR. However, porous...

Crown porosity influences radiation interception, air movement through the fruit orchard, spray penetration, and harvesting operation in fruit crops. The aim of the present study was to develop an accurate and reliable methodology based on transmitted radiation measurements to assess the porosity of traditional olive trees under different pruning treatments. Transmitted radiation was employed a...

The main objective of this work is quantitative evaluation of porosity in carbon fiber reinforced polymers (CFRP) with the help of X-ray computed tomography (XCT). For this purpose two types of sample were compared. Industrial porosity sample was obtained from an aeronautical industry. Artificially induced porosity samples were created by drilling holes with diameter 0.2 mm and 0.3 mm in non-po...

abstract wenner direct contact method is a method of estimating apparent electrical conductivity (eca) of agricultural soils in situ. this method can be affected by factors such as quality of electrodes in contact with soil, type of employed electric current, moisture content, clay content and compaction of soil. in this research, the effect of electrode type (rod and plate) and electric curren...

Underwater wet welding (UWW) combined with the shielded metal arc (SMAW) method has proven to be an effective way of permanently joining metals that can performed in water. This research was conducted determine effect water flow rate on physical and mechanical properties (tensile, hardness, toughness, bending effect) underwater welded bead A36 steel plate. The control variables used were a spee...

A mathematical model is developed to study the performance of a direct carbon solid oxide fuel cell system (DC-SOFC). Simulation results indicate that in anode supported configuration, design parameters (porosity, tortuosity and thickness) play very important role DC-SOFC, presented as polarization curve. The effect Ag content electrode found significant DC-SOFC. operating parameters, namely pr...