Hydrogen Peroxide (H2O2) is a byproduct formed during an Oxygen Evolution Reaction which hinders the formation of O2 and slows the kinetics of water splitting. Spin plays a vital role in the reduction of peroxide. In this work the role of magnetic field in the reduction of H2O2 formation using UV-visible supported titration method has been studied. Nickel Foam was utilized as a working electrode and electrochemical measurements were conducted to verify the reduction in the H2O2 formation with the magnetic field. There was a remarkable 44% decrease in the formation of H2O2 when a magnetic field of 3500 Oe was applied. Moreover, there was a reduction of 22 mV in the overpotential which was confirmed by Linear Sweep Voltammetry measurement.

Biodegradable polymer-based nanocomposites (NCs) are increasingly being investigated in order to reduce the hazardous effects of wastes produced from non-degradable plastics. Thus, the present work reports the structural and optical investigation of biodegradable polymers i.e. Starch-Sodium Alginate (SSA) blend embedded with bimetallic gold (Au) - silver (Ag) nanoparticles (NPs). Au-Ag NPs synthesized using the chemical reduction method, were dispersed into the SSA blend to fabricate the nanocomposite (NC) films via a solution-casting approach. High-resolution transmission electron microscopy (HR-TEM) confirmed the growth of Au-Ag NPs. The size of the NPs obtained from TEM comes out to be 19.7 ± 5.1 nm. The Au-Ag@SSA NC films were further characterized using UV-Visible-NIR spectroscopy. The absorption bands appearing at 520 nm and 400 nm confirmed the formation of Au NPs and Au-Ag NPs respectively. The absorption data was further utilized to determine the optical energy gap ‘Eg ’ and Urbach’s energy ‘Eu ’ of the NC films. The value of ‘Eg ’ decreases and ‘Eu ’ increases with the addition of Au-Ag NPs in the SSA matrix which makes these NC films a potential contender for using in various optical devices.

With the rapid growth of cloud computing and the increasing number of cloud services available, the accurately selecting and recommending cloud service has become a challenging task for users. Traditional methods based on text classification and topic modeling have limitations in handling the diverse range of cloud services. To overcome these challenges, this paper proposes a novel approach that combines Gaussian Latent Dirichlet Allocation (GLDA) and attention mechanisms to enhance the accuracy and effectiveness of cloud service’s selection and recommendation. GLDA captures the continuity and relevance between words, improving topic modeling. The attention mechanisms focus on relevant tag fragments to guide attention toward content related to cloud services. By combining GLDA and attention mechanisms, our method offers advantages in semantic information and precise recommendations. This paper provides a promising solution to improve the selection and recommendation of cloud services, offering users a better experience.

In this paper, CNC milling cases of space chute of a support part and space bevel of a supporting seat part are studied. Aiming at the multi-directional property of space chute (inclined plane), this paper studies the calculation method of space multi-directional installation Angle required in NC machining positioning. The spherical graph method is used to accurately and conveniently calculate the positioning Angle, orientation Angle and key Angle required for NC machining of parts. At the same time, a set of hole system combination fixture which can flexibly adjust the space Angle is designed. It can be in the pre-set coordinate point positioning, flexible adjustment of spatial positioning Angle, easy to NC machining tool implementation, and convenient computer aided simulation assembly, simulation processing and simulation analysis. This paper also studies the installation and implementation of the parts and fixture on the CNC machining center and the calculation of the tool when the space inclined plane is CNC milling.

This article analyzed the preparation methods of ferroelectric photovoltaic thin films. This article analyzed the modeling of impact mechanics, including mass distribution, boundary conditions, and loading conditions, to ensure appropriate load transfer and joint stability; in the simulation, it was found that the material properties included photovoltaic and ferroelectric properties, which were suitable for the production of knee joint protectors. From these data, it could be found that the deformation of protector 2 was smaller than that of protector 1, indicating that the PZT material in protector 2 could better fix the protector and prevent significant deformation due to impact behavior. It had a higher hardness value, representing higher wear performance. The results of this article highlighted that sports knee joint protectors based on PZT materials could better cope with impact behavior, extend the lifespan of the protector, and protect the wearer’s knee joint.

Periodic boundary condition is commonly used in the FE homogenization method for predicting the thermo-mechanical properties of composites. However, its existing numerical algorithms are generally inefficient. Linear displacement boundary condition is much easier and more efficient to implement for the Representative Volume Elements (RVEs) with conformal and nonconformal surface meshes. Aiming at replacing the periodic boundary condition by the linear displacement boundary condition to easily and efficiently predict the thermo-mechanical properties of composites, this paper compares the implementation efficiency and prediction accuracy of the periodic and linear displacement boundary conditions. Regarding the prediction of the elastic properties of composites, the balance of micro-energy and macro-energy of the RVEs imposed the periodic and linear displacement boundary conditions is checked, and the results demonstrate that these two boundary conditions guarantee the Hill lemma (i.e. the balance of micro-energy and macro-energy of the RVEs). Moreover, comparing with the experimental test and the multi-step micro-mechanical method, the effectiveness of the periodic and linear displacement boundary conditions to predict the elastic properties of composites is validated.

Two sorts of phosphor [ZnEu2(2,5-PDC)4(H2O)4]·6H2O and NaEu(2,6-PDC)2 (H2O)7 have been prepared by the WASSR (water assisted solid-state reaction) method, which WASSR method of a soft chemical synthesis method is easy to prepare the sensitive phosphor materials comparing to those ways required high temperature condition and other extra treatment. This study main detected the thermal stability and dehydration/hydration behavior for the samples under the different chemical and physical circumstances.

This paper presents a comprehensive investigation on the synthesis, characterization, and dielectric properties of BaFeO3-x material. The solid-state process was utilized, employing high-purity BaCO3 and Fe2O3 precursors. The calcination step at different temperatures (800 °C, 900 °C, and 1000 °C) revealed that the sample calcined at 1000 °C exhibited the desired perovskite phase with no impurities. Morphological analysis through scanning electron microscopy (SEM) exhibited homogenous cubic grains with well-defined shapes and sizes. The sintered pellets at 1100 °C demonstrated excellent densification, devoid of visible pores or voids, and well-structured grain boundaries. The dielectric measurements unveiled intriguing properties of the BaFeO3-x samples. The dielectric constant exhibited a remarkable peak value of 55,000 at the transition temperature of 145 °C, with an increasing trend as the frequency increased. The dielectric constant also demonstrated frequency-dependent behavior, with higher values at lower frequencies. The dielectric loss remained low below the transition temperature but increased beyond it. Additionally, the modified Uchino law was applied, revealing a linear fit between ln[(ε max/εr )-1] and ln(T˗Tm ) at 1 kHz, with a slope of γ (2.8721) and a characteristic length scale of δ (64.34). These findings provide insights into the temperature-dependent dielectric behavior of the material. This study highlights the significance of calcination temperature for achieving the desired crystal structure, as well as the importance of sintering in obtaining dense and well-structured pellets. The intriguing dielectric properties of BaFeO3-x offer potential applications in electronics and energy storage.

In this paper, different Mn content doped potassium sodium niobate (KNMN) coatings were prepared by plasma spraying technology, and the effects of different Mn content doping on the microstructure and electrical properties of the coatings were investigated. The results showed that the mechanical and electrical properties of the coatings showed a trend of increasing and then decreasing with the increase of Mn doping content, and the best mechanical and electrical properties of the coatings were obtained when the Mn doping content was 2 mol%.

The zinc bismuth borate (ZBB)glasses have been calculated using Phy-X program at the Compton energy range. The ZBB glasses were decided in the concentration of Bi2O3 = 25, 30, 35 and 40 mol%. The mass attenuation coefficient, the effective atomic number, the effective electron density, the half value layer and the lead equivalent thickness were investigated. The results show the trend of values were decrease when the Compton energy increasing and found the values were higher when the concentration of Bi2O3 increases. The Zeff and Neff show similar trend showing that the values decrease with decrease in Bi2O3 content. The HVL value shows lowest with an increase in concentration of Bi2O3 suggesting their role to be good candidature for radiation shielding material applications. The lead equivalent thickness of glass samples shows a good trend when adding more concentration of Bi2O3 and found the highest value at 40 mol% of Bi2O3 concentration.