by Ladislaus Alexander Bányai  and Mircea Bundaru

Received: 21 October 2022;  Published: 08 December 2022;  doi: 10.21926/rpm.2204027

We describe here the coherent formulation of electromagnetism in the non-relativistic quantum-mechanical many-body theory of interacting charged particles. We use the mathematical frame of the field theory and its quantization in the spirit of the quantum electrodynamics (QED). This is necessary because a manifold of misinterpretations emerged especially regarding the magnetic field and gauge invariance. The situation was determined by the historical development of quantum mechanics, starting from the Schrödinger e [...]

by Jeet Chand  , Shiva Jha  and Sameer Shrestha

Received: 29 August 2022;  Published: 25 November 2022;  doi: 10.21926/rpm.2204026

Water recycling is a potential tool for reducing the dependency on traditional water sources, which would eventually reduce the likelihood of volumetric restrictions and their impacts on the water sector. Therefore, exploration, development, and use of alternative water sources are required for sustainable development. Scientific studies on the efficient and economical use of nontraditional water sources developed using the recycling process have attracted the attention of agriculturists, planners, and engineers fo [...]

by Pratik Shukla  , Vincent Zhang  , Xiaojun Shen  , Victor M. Villapún  , Sophie Cox  and Phil Swanson

Received: 10 April 2022;  Published: 22 November 2022;  doi: 10.21926/rpm.2204025

This is a multi-disciplinary paper focused on the preliminary results of deploying laser shock treatment (LST) to ZrO2 ceramics. This work has significance in several industrial sectors for components that will benefit from strengthening. These components are, namely: dental implants; cutting and drawing tools; valves, bearings, pressure vessels, heat exchangers and high-performance scissors and knives, where modification of hard, brittle materials properties such as that of a ZrO2, can yield a performance boost. T [...]

by Rim Werheni Ammeri  , Wafa Hassen  , Ines Mehri  , Nesrine Khelifi  and Abdennaceur Hassen

Received: 29 July 2022;  Published: 18 November 2022;  doi: 10.21926/rpm.2204024

Bioaugmentation by Pseudomonas strains is widely used for the removal of pollutants in wastewater. In this study, we aimed to determine the removal of pentachlorophenol (PCP, 800 mg·L–1) in secondary wastewater by the bioaugmentation process. We determined the effects of using three surfactants, namely sodium dodecyl sulfate (SDS), cetyl-tri-methyl-ammonium bromide (CTAB), and Tween 80 for PCP removal. We determined the effect of the role of PCP surfactant for the biofilm and auxin production of the selected bacter [...]

by Oleksandr Beshta  , Gennadiy Pivnyak  , Oleksandr Beshta Jr  , Roman Borovik  , Cáceres Cabana Edgar  and Adam Smolinski

Received: 17 August 2022;  Published: 14 November 2022;  doi: 10.21926/rpm.2204023

In a lithium-ion battery, the crossing of its charging–discharging curves represents an unambiguous current capacity. The reproduction of a complete charging–discharging cycle defines the maximum possible charge for a current battery state. When obtaining of the curves experimentally, one should consider the duration of polarization or depolarization. It is reported that the battery capacity depends considerably on the value of the battery’s internal resistance as this value defines the location of the actual charg [...]

by Dafni Foti  , Costas Passialis  , Elias Voulgaridis  and Stergios Adamopoulos

Received: 23 August 2022;  Published: 28 October 2022;  doi: 10.21926/rpm.2204022

Cellulosic fibrous mats were impregnated with various water-repellent formulations based on reclaimed polystyrene (5, 10, 15, and 20%), alkyd resin (5%), gum rosin (5%), and paraffin wax (0.5%). The mats were tested for their bursting strength and resistance to bending. They were also subjected to the ring crush test and short-span compression test. By increasing the concentration of total solid ingredients (5, 10, 15, 20, and 25.5%), the retention and grammage of the mats were increased, and all strength propertie [...]

by Mohammad Yaghoub Abdollahzadeh Jamalabadi

Received: 09 July 2022;  Published: 19 October 2022;  doi: 10.21926/rpm.2204021

New lubrication events can be predicted using improved pathological non-Newtonian physiological fluids coupled to phospholipid-based bilayers in variable time-dependent magnetic fields under random non-steady conditions. In this study, we investigated nanofluid lubrication systems for synovial joints. The particles of PSPMA-g-HSNPs were used as nanoparticles. The hydrodynamic interaction between the knee bones separated by a nanofluid film was considered here for various nanofluid concentrations. The simulation ind [...]

by Navya Uppu  , Kelly McMahen  , Tasneem Khasru  and Mark A. DeCoster

Received: 02 August 2022;  Published: 17 October 2022;  doi: 10.21926/rpm.2204020

Green synthesis of nanomaterials endeavors to reduce the use of high energy methods with those that may include lower temperatures and pressures, use of natural products, and bottom-up self-assembly. Here we describe the generation of metal-organic biohybrids (MOBs) with nanoscale features synthesized at physiological (37°C) and room temperature (25°C). These MOBs utilized the naturally occurring amino acid dimer cystine as the biological component, and a series of metals, including copper, silver, and cobalt. The [...]

by William E Vargas  , Federico Muñoz-Rojas  , Esteban Avendaño  , Victoria Quirós-Cordero  and Marcela Hernández-Jiménez

Received: 30 July 2022;  Published: 12 October 2022;  doi: 10.21926/rpm.2204019

Spectrophotometry has been widely used to retrieve the dielectric function of a bulk iridium sample using an extended version of the Drude–Lorentz model. The parameters of the model are optimized using a spectral-projected-gradient-method-assisted acceptance-probability-controlled simulated annealing approach. Furthermore, optimized values of Drude parameters corresponding to the optical response of electrons and holes (scattering frequency of electrons, the ratio between scattering frequencies of holes and electro [...]

by Pierre Bernstein  , Yiteng Xing  and Jacques Noudem

Received: 07 July 2022;  Published: 15 September 2022;  doi: 10.21926/rpm.2203018

Stable levitation of systems consisting of a magnetic source and a superconductor is actively investigated due to the promising applications of this technology. While huge efforts have been made for modeling these setups with numerical simulations, analytical models, in spite of their use being limited to devices with a high degree of symmetry, can bring precious information on certain characteristics of levitating systems. Summarizing our previous work in the field, we present the mean-field model that we have pro [...]