In this paper, different Pulse Width Modulation (PWM) strategies for operating with a low-switching frequency, topology that combines Conventional Matrix Converters (CMCs), and Coupled Reactors (CRs) are presented discussed. The principles of the proposed first discussed by conceptual analysis later validated simulation. paper shows how combination CMCs CRs could be special interest sharing cur...

Woven ceramic matrix composites (CMCs), exhibiting excellent thermomechanical properties at high temperatures, are promising as alternative materials to the conventional nickel-based superalloys in hot section components of aero-engines. Therefore, understanding and predicting lifetime CMCs is critical. Fatigue prediction woven currently involves long-term costly testing. A feasible use predict...

Experiments were conducted to examine soil nutrient dynamics under different farming systems and sources on maize yield. It was a split plot fitted into RCBD with three replicates. Main plots included two cropping (CS) (maize groundnut fallow): sub-plots; residue (GNR), (MZR), Cow dung (CD), pig manure (PGM); four composts; (PGM+MZR, PGM+GNR, CD+GNR CD+MZR) each at 5 t/ha; NPK 120 kg/ha, (Co) c...

Rare-earth phosphates (REPO4) are regarded as one of the promising thermal/environmental barrier coating (T/EBC) materials for SiCf/SiC ceramic matrix composites (SiC-CMCs) owing to their excellent resistance water vapor and CaO–MgO–Al2O3–SiO2 (CMAS). Nevertheless, a relatively high thermal conductivity (?) REPO4 becomes b...

The problem of the formation and estimation a thermoradiant temperature field in ceramics Thermal- Environmental-Barrier Coatings (TBC/EBC) has been considered with complex heat transfer but under influence penetrating intense radiant component. authors proposed to analyze not only TBC also EBC from point view optics semitransparent scattering absorbing media range ~0.4–4 μm external action. Th...

WC/Y–TZP–Al2O3 hybrid ceramic–matrix composites (CMCs) with dispersed Hadfield steel particles were sintered and then tested at sliding speeds in the range of 7–37 m/s contact pressure 5 MPa. Fast low-temperature sinter-forging allowed obtaining micron-sized WC grains, submicron-sized alumina-reinforced yttria partially stabilized polycrystalline tetragonal zirconia (Y–TZP–Al2O3), evenly distri...

Case management centres (CMCs) are part of the outbreak control plan for Ebola virus disease (EVD). A CMC in Sierra Leone had 33% (138/419) of primary admissions discharged as EVD negative (not a case). Fifteen of these were readmitted within 21 days, nine of which were EVD positive. All readmissions had contact with an Ebola case in the community in the previous 21 days indicating that the inf...

A series of highly branched trichain sulfosuccinate surfactants have been synthesized and studied in condensed CO2 and aqueous environments. Aqueous critical micelle concentrations (CMCs) showed a general trend of increasing CMC with decreasing chain length, whereas increased branching appeared to increase solubility in CO2 and aid the dispersion of water. Near infrared spectra confirmed observ...

Stem cell research has generated great excitement over the last few years. In cardiovascular medicine, the possibility to cure heart failure with newly generated cardiomyocytes (CMCs) has sparked the interest of many scientists; as a result, different "ideal" cardiac stem cells were proposed for therapeutic use. We review here the literature in the cardiac stem cell field, which sometimes is "d...

The aim of the present study is to demonstrate how mesoporous nanostructures of Zinc Sulfide (ZnS) will precipitate in an ethanol media in spite of negligible solubility of Sodium Nitrate (Na2S), which is role-played as sulfur precursor. On the following, the role of such synthesizing method on the photocatalytic behavior of ZnS mesoporous nanostructures has been investigated. Characterization ...