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By the utilisation of MnO2-NiO as the catalytic probe, a novel label free electrochemical sensor has been fabricated for selective and sensitive identification of atrazine. The electrocatalytic reduction of atrazine was found to occur at -1.0 V. It has been experimentally demonstrated that a sensing selectivity towards atrazine in the presence of interfering ions. Compared to the existing atrazine sensors, the MnO2-NiO based sensor provides a wide linear range response for the detection of atrazine. The sensor showed long-term stability, and good reproducibility. The sensor was successfully illustrated for detecting atrazine in tap and waste samples. This work paved the way for electroanalytical application of nanosized MnO2-NiO particles and offers new opportunities for applications in bioanalysis and environmental chemistry.

https://doi.org/10.1016/j.mseb.2023.116302

The inclination and orientation of a Photovoltaic (PV) module significantly impact its energy yield and power output. Most commonly, the angle of the module is fixed based on the latitude of the site and field experiences. However, this angle may not result in maximum PV panel output Moreover, there is a shortfall in experimental analysis. The performance of 21 PV modules placed in three orientations, namely south, southeast and southwest and at seven different tilt angles in each of three orientations installed on the rooftop of a building in Punjab Engineering College (Deemed to be University), Chandigarh, has been evaluated by using actual measurement data as logged by data loggers installed. The database from July 2018 to June 2019 has been statistically analyzed to examine the influence of module inclination and orientation on its energy and power output. The impact of mutual shading of modules (due to inappropriate row spacing) on power generation and optimal tilt angle values has been analyzed in this work as well. Therefore, recommended optimal annual fixed tilt angle for Chandigarh is 17±2 ° and orientation is South.

Doi of recent published articles:
(i)https://onlinelibrary.wiley.com/doi/10.1002/9781119804017.ch2
(ii) DOI: 10.1007/978-981-15-8025-3_42

In practice, nonlinear electrical loads pose various power quality (PQ) challenges. Driven by these challenges, a parallel combination of a nonlinear load and a photovoltaic (PV) inverter with adaptive quantum normalized-least mean fourth (qXE-LMF) filter is proposed and experimentally validated to detect and compensate for the harmonics in harmonically contaminated currents. A scheme with an adaptive qXE- LMF using fundamental weight components is used to generate the harmonics in the inverter output current thereby improving the PQ of the grid supply. The resulting grid current is pure and balanced; the PV inverter connected in parallel with the nonlinear load provides reactive and harmonic current support. Practically, the adaptive feature enables the online learning of filter weights of the load current harmonics to guarantee unconditionally balanced sinusoidal grid current. The proposed qXE-LMF filter ensures fast convergence and minimum steady-state oscillations in the grid reference currents. An improved anti-windup PI compensator is used to ensure DC-link voltage stabilization. The practicality of the proposed adaptive qXE-LMF filter is experimentally demonstrated using a three-phase four-wire uncontrolled rectifier-based nonlinear load. The experimental results also demonstrate the robustness of the qXE-LMF filter against changes in solar insolation level and

Journal Name: IEEE System Journal (I.F. 4.802) Print ISSN: 1932-8184 Online ISSN: 1937-9234

DOI: 10.1109/JSYST.2023.324134 6

Electro chemical discharge machining (ECDM) process is gaining considerable importance in micro-machining of non-conductive and brittle materials like glass and ceramics. Recently it has undergone some innovations in the form of hybrid and variant processes, which have been reviewed and discussed in this paper. To further aid developments, an innovative hybrid process combining electrolyte-stirring and tool-rotation effect has been experimented and reported in this paper. The study was carried out in a phased manner on an in-house fabricated setup using Taguchi's orthogonal array L18. The experimental results illustrate an improvement in the process as compared to normal ECDM (without using electrolyte stirring and tool rotations). The optimum value for material removal was 1.282 mg/min and surface finish (Ra) was 0.4 μm.

For more information: http://dx.doi.org/10.1504/IJMMM.2020.111354

The carbonyl iron powder (CIP) reinforced polycaprolactone (CIPC) wasused to print three pre- existing stent designs such as ABBOTT BVS1.1, PALMAZ-SCHATZ, and ART18Z. The physicochemical behavior was analyzed by X-ray diffraction and scanning electron microscopy. The radial compression test, three-point bending test and stent deployment test were carried out to analyze the mechanical behavior. The degradation behavior of the stents was investigated in static as well as dynamic environment. To investigate the hemocompatible and cytocompatible behaviors of the stents, platelet adhesion test, hemolysis test, protein adsorption, in vitro cell viability test and live/dead cell viability assay were performed. The results revealed that stents had the adequate mechanical properties to perform the necessary functions in the human coronary. The degradation studies showed slower degradation rate in the dynamic environment in comparison to static environment.In vitro biological analysis indicated that the stents represented excellent resistanceto thrombosis, hemocompatible functions as well as cytocompatible nature.

For more information: https://doi.org/10.1002/jbm.b.34795