On the Maximal Output Admissible Set for a Class of Bilinear Discrete-time Systems

International Journal of Control, Automation and Systems - Given a discrete-time controlled bilinear systems with initial state x0 and output function yi, we investigate the maximal output set...     

Design,Simulation and Analysis of a High Gain Small Size Array Antenna for 5G Wireless Communication

Wireless Personal Communications - Microstrip antennas have become a part and parcel of today’s wireless communication world because of their low profile, low cost and ease of fabrication in...     

Influence of BaO Doping on the Structural,Ac Conductivity,and Dielectric Properties of BiFeO3 Multiferroic Nanoparticles

Journal of Inorganic and Organometallic Polymers and Materials - The Bi1?xBaxFeO3 (BiBaFeO3) multiferroic nanoparticles with different Ba molar concentrations were fabricated in reliance on...     

Effects of Foliar Applications of Zinc in the Forms of Free Mineral or Amino Acid Complexed on Qualitative Characteristics of Olive Oil

An orchard experiment was conducted during two successive years to evaluate the effectiveness of the foliar application of zinc (Zn) in mineral form (ZnSO₄) or chelated with various amino acids (AAC) on the oil content, qualitative indices, and fatty acid profile of olive oil. All Zn sources were applied at a rate of 0.2% during two growth stages; at full bloom (FB) and 15 days after FB. The results showed that Zn, regardless of applied sources, accumulated more Zn in leaves and fruits compared to the control. The effectiveness of Zn-AAC in increasing leaf and fruit Zn concentration was higher than ZnSO₄. In both years, an increase in oil content and concentration of phenolic compounds and chlorophyll in the oil was observed when trees were treated with Zn, although these effects were dependent on the Zn sources. In general, the Zn-AAC treatments, especially Zn-methionine (Met), was more effective than ZnSO₄. Zn-AAC treatments increased the L* value and b* intensity, while decreasing the a* value of olive oil compared to the control. However, ZnSO₄ had a slight or no significant effect on oil color. The oil fatty acid profile was also affected by Zn. The Zn-Met and Zn-Glycine (Gly) were more effective than the other Zn sources in increasing monounsaturated fatty acid, specifically oleic acid of oil in both years, respectively. These results could suggest that the application of Zn-AAC, especially Zn-Met and Zn-Gly, can be considered as a new strategy to improve olive oil quality and quantity in Zn-deficient soils.     

Enhancing operating capacity of microbial fuel cells by using low-cost electrodes and multi anode-cathode connections in a membrane-less configuration

Air-cathode microbial fuel cells (MFCs) are common configurations for real scales, especially wastewater treatment due to direct access to oxygen and scaling up capability. Herein, a single-chamber MFC (SCMFC) was used. The fabrication of graphite paint/stainless steel mesh (GP/SSM) anodes in sinusoidal geometry increased the electrode surface area per unit volume of the SCMFC and made it possible to utilize the maximum reactor capacity. Under batch mode, the SCMFC produced 1597 mW/m³ using six anodes and eight air-cathodes, and the maximum COD removal was obtained 93.22% and 93.54% in the second and fourth batches, respectively. Moreover, the effect of electrode surface area on power output was investigated; the power density became 2-fold when the air-cathodes’ surface area increased eight times, and increasing the anode surface area improved the power production per unit volume. The COD removal of 82.14% with 20.46% columbic efficiency was achieved after 72 h of continuous operation.     

A finite-difference procedure to solve weakly singular integro partial differential equation with space-time fractional derivatives

Engineering with Computers - The main aim of the current paper is to propose an efficient numerical technique for solving space-time fractional partial weakly singular integro-differential...     

Photoelectrocatalytic reduction of CO2 to methanol over CuFe2O4@PANI photocathode

The present study was aimed to convert CO₂ into methanol which not only addresses the potential solution for controlling the CO₂ concentration level in the atmosphere but also offers an alternative approach for the production of renewable energy source. In this perspective, a hybrid photocatalyst, PANI@CuFe₂O₄ was synthesized, characterized and used as a photocathode for photoelectrocatalytic (PEC) reduction of CO₂ to methanol in aqueous medium at an applied potential of ?0.4 V vs NHE under visible light irradiation. The combination of PANI with CuFe₂O₄ greatly increased the PEC CO₂ reduction to methanol owing to enhance the CO₂ chemisorption capacity by the photocathode surface and at the same time facilitated the separation of photogenerated electron-hole (e^?/h⁺) pairs. The incident photon to current efficiency (IPCE) and quantum efficiency (QE) for methanol formation in PEC CO₂ reduction could be achieved as 7.1 and 24.0% respectively. The rate of formation of methanol in PEC CO₂ reduction was found as 49.3 μmol g^?1h^?1 with 73% Faradaic efficiency. Compared to photocatalytic reaction, the PEC results demonstrated that the applied potential could effectively separate the photogenerated e^?/h⁺ pairs and therefore, enhanced the PEC CO₂ reduction activity of the hybrid photocatalyst.     

Integration of geophysical techniques to detect geotechnical hazards: a case study in Mokattam,Cairo, Egypt

Bulletin of Engineering Geology and the Environment - Geotechnical hazards are the main factors that control decisions about construction in structurally complex zones. In the Mokattam area, Cairo,...