بحوث سكوبس — م.م. فاطمة صفاء فاهم مرجان

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/policies/article-withdrawal). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authorships within the article, the editor reached out to the authors for an explanation. None of the authors have responded to the correspondence. The editor therefore feels that the findings of the manuscript cannot be relied upon, and the article needs to be retracted. © 2024

Environmental concerns and higher energy demand require more energy. Solar and wind are renewable energies. One of the most important and available renewable energy sources is the use of wind and solar sources. This study examines energy generation and battery storage systems for lowering peak load and smoothing a residential substation's load curve. This study aims to present a useful and effective mechanism for improving the design of a hybrid system using solar panels and wind turbines to provide the common peak load and as much actual load demand as possible at the desired location. The proposed method provides the optimal solution after obtaining light radiation, wind speed, and load demand. Training and learning-based algorithms optimize. This study focuses on reducing lifetime costs. Prices and equipment are accurate, and power plant costs include initial and ongoing costs. PSO optimizes Karachi's anemometer and radiation data. The results showed that the network's summer, fall, and winter peak outputs are 12368 kW, 14865 kW, and 77 147 kW; the systems are 68.31 kW, 29.38 kW, and 2337 kW. Using the seasonal average rather than the annual average improves the system's dependability and provides a more accurate response to the desired peak load. Wind and solar hybrid systems connected to the grid can reduce the grid's peak load and total cost over time. © (2023). All Rights Reserved.

In this letter we have proposed a four-level graphene monolayer system for identifying the topological charge of Laguerre-Gaussian light. Here, we have shown that due to the four-wave mixing mechanism in the monolayer graphene system, a weak signal beam can be generated due to quantum coherence and interference effect. We have discussed the spatially dependent linear absorption spectrums of the weak probe and new generated signal beams via quantum mechanical density matrix formalism. We have found that by numbering the spot areas of the probe and signal beams, one can realize the topological charge of the Laguerre-Gaussian beam interacts by monolayer graphene system. Moreover, we have realized that for some topological charge the new generated signal beam can be amplified in the graphene system. © 2023 Astro Ltd.

This work is presented to evaluate the influence of titanium dopant on the various properties of barium ferrite nanoparticles (BaFe2O4). Ba1−xTixFe2O4+δ with x varying from 0.0 to 1.0 were prepared by chemical technique. The titanium doping results in creation of cationic vacancies with the increased surface area. The crystalline size was decreased with the enhanced Ti4+ doping process. The saturation magnetization was decreased with the increased Ti4+ content. Photocatalytic properties of un-doped and doped BaFe2O4 was investigated for alizarin yellow (AY) dye. The Ba0.3Ti0.7Fe2O4.7 nanoparticles act as the best photocatalyst with the degradation potential (100.0 %). The enhanced photocatalytic amount was obtained due to the narrowing of band gap of Ba0.3Ti0.7Fe2O4.7 (2.07 eV). The stability and reusability test shows that the amount of degradation was negligibly decreased after 5th cycles. Thus, the Ti4+ doped barium ferrite proved to be great method in modifying the photocatalytic response in the degradation process. Antibacterial analysis depicts that the high content of Ti4+ doped barium ferrite showed higher antibacterial properties against Staphylococcus aureus and Helicobacter pylori. © 2022 Elsevier B.V.

α-aminophosphonate oxadiazoles (5a-m) were prepared in high yields by reacting of 1,3,4-oxadiazole acetohydrazide (3) with Interaction between engineered nanomaterials and plants is important; Because plants have direct contact with water, soil, and therefore the atmosphere, the potential pathway for higher species to encounter these nanomaterials is thru the organic phenomenon that plants form the most ring and source of. the aim of the article, Plant Toxicity and Biotransformation, is to boost our understanding of a number of the interactions of engineered nanomaterials with plants, including their toxicity to plants and biotransformation or biodegradation of nanomaterials within the plant system. Mechanisms of nanomaterial toxicity to plants and biological access to nanomaterials aren't yet well understood. it's clear that in these circumstances, further evaluations of the interaction of nanomaterials and plants, likewise because the development of latest methods for characterizing nanomaterials in vivo, are necessary so as to create sustainable use of nanotechnology. © 2022 National Information and Documentation Center (NIDOC)

In this work, the shock wave response of a pore-embedded CuZr metallic glass (PEMG) under different impact velocities (0.5-1.5 km/s) and initial temperatures (300-600 K) was evaluated through the molecular dynamics (MD) simulation. The results indicated that the nucleation and growth of nanoscale shear events around the pore were the dominant mechanisms for plastic deformation under the shock wave. It was also found that the increase in the impact velocity led to the filling of pore, which was due to the structural softening and the local temperature increment in the vicinity of pore. Moreover, the spall event originated from the formation and coalescence of tension transformation zones, leading to the formation of nanovoids in the system. At higher velocities, the spallation was accompanied with the formation of more nanovoids with smaller sizes, inducing the brittle failure in the system. The MD outcomes also showed that the increase in initial temperature decreased the shock pressure and flow shear stress and led to the smoother spallation in the PEMG. © 2022 Indrajit Patra et al.

The practice of urban landscaping has many positive effects, both on the environment and the local economy. By shading buildings, absorbing sunlight, reducing UV light, cooling the air, and decreasing wind speed, these advantages include a reduction in indoor temperature. In the present study, tree planting patterns as a green belt surrounding an office building (Pematangsiantar Road Administration building) have been explored in an effort to reduce energy consumption. For this objective, three potential tree planting layouts at a distance of 10 m from the structure were examined. The cuckoo search method was used to identify 21 ideal planting situations out of 1020 possibilities. The tree was modeled using quantitative parameters of the Yackandandah species, including crown diameter, height, and trunk diameter. To validate the results, the temperature and relative humidity diagrams from the simulated building were compared with the actual data from the heat and humidity sensors. The results demonstrated that there is a substantial difference in building energy usage across different arboricultural models and instances. Compared to directed models, simultaneous tree planting in all directions of the building led to the lowest energy use. This phenomena can reduce the surface temperature of buildings and the need for cooling energy by up to 16 percent during warm seasons. According on the findings of an annual energy audit, annual energy savings could range between $400 and $1100. © 2022

The work deals with one of the applications of adsorption from solution. It deals with the study of the removal of Indigo Carmine dye on the selected eco-friendly surface (Graphene Oxide/poly (acrylic amide/Formic acid)). This research relied on preparing a GO/P(AM-FA) hydrogel surface that can be prepared from available and inexpensive materials with high efficiency in removing the Indigo Carmine dye from its aqueous solution. The physical and chemical properties of the surface were studied through several important techniques, including (fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM)). Two types of Langmuir and Freundlich adsorption isotherms were studied and through the results. It was found that it obeys the Freundlich model depending on the value of (R2 = 0.9276) for heterogeneous surfaces. Also, the adsorption kinetics of first order and second order were studied, and the results found that it obeys the second-order depending on the value of (R2 = 0.9999). © 2022, Dr. Yashwant Research Labs Pvt. Ltd. All rights reserved.

In this study, the dynamic mechanical spectroscopy was used to characterize the effects of minor Ni addition on the relaxation behavior of ZrCoAl bulk metallic glass (BMG). For this purpose, the Kohlrausch-Williams-Watts (KWW) function and quasi-point defect (QPD) model were used for evaluation of relaxation under the different aging temperatures. The results indicated that the Ni addition shifted the relaxation process to the higher temperatures. Moreover, the estimations showed that the activation energy of relaxation was 5.951 eV and 6.205 eV for ZrCoAl and ZrCoAlNi, respectively. It was also revealed that the microalloying process enhanced the structural defects in the system and led to the improvement of dynamic heterogeneity in the BMG. Comparing the physical models, it is suggested that a small change in the structural defects intensifies the dynamic heterogeneity in the material. © 2022 Rosario Mireya Romero Parra et al.

Hydrogel can be swelling in water and is three-dimensional polymeric. Because of its ability to absorb water in large quantities, it is highly efficient in removing pollutants. The hydrogel was prepared from low-cost and available materials, and the hydrogel surface has high efficiency for removing chloramphenicol (CAP) from an aqueous solution. Many of the chemical and physical properties of the prepared surface were studied from these important techniques (fourier transform infrared spectroscopy (FTIR), x-ray diffraction analysis (XRD), transmission electron microscopy (TEM), and acute flaccid myelitis (AFM)). The adsorption capacity increased between 1-minute and 25 minutes, after which the equilibrium time for the hydrogel surface reached the equilibrium state after one hour. adsorption method is perfectly appropriate for model second-order, giving the best value of (R2=1) and the K2 constant of rate (0.1414 g mg-1min-1)the temperature adsorption (25oC). © 2022, Dr. Yashwant Research Labs Pvt. Ltd.. All rights reserved.

In this letter, we have studied the optical lateral shifts of transmitted and reflected lights in a defect structure doped by a single layer of graphene nanostructure. For adapting the optical features of the lateral shifts, we have first studied the refractive index properties of the defect layer. We have studied the conditions for achieving the negative and positive refractive index of the graphene monolayer system. After that, we have discussed the optical lateral shifts of the reflected and transmitted light beams when the refractive index of the graphene nanostructure become positive or negative, respectively. We have found that the enhanced lateral shifts for reflected and transmitted lights may be possible for a positive refractive index. For the negative refractive index, we have realized that simultaneous negative or positive lateral shifts are possible for the reflected and transmitted light beams. In our proposed scheme, the lateral shifts at the fixed incident angle are possible only by tuning the optical parameters without needing to change the cavity structure. © 2022 Astro Ltd.