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DFT investigation of half-metallic ferromagnetic rare earth based spinels MgHo_(2)Z_(4)(Z=S,Se)

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Journal of Rare Earths 2024年第1期42卷 121-128,I0005页

作者： Maiza Zanib Mumtaz Manzoor N.A.Noor M.Waqas Iqbal Mazia Asghar H.H.hegazy A.Laref Department of Physics Riphah International UniversityLahore CampusPakistan Research Centre for Advanced Materials Science King Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Physics and Astronomy College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Half-metallic ferromagnetism,mechanical as well as thermoelectric properties for rare earth-based spinels MgHo_(2)Z_(4)(Z=S,Se)were investigated using density functional theory(DFT).Structural optimization was done with Perdew-Burke-Ehrenzorf(PBE)sol-generalized gradient approximation(GGA)to calculate the lattice constant of both spinels comparable to experimental *** addition,Born stability criteria and negative formation energy show that our studied spinels are also structurally and dynamically stable in the cubic *** ferromagnetic(FM)state stability,we also calculated the energy differences among FM,antiferromagnetic(AFM),and non-magnetic(NM)***,Curie temperatures of ferromagnetic phases were also *** used Trans-Blaha improved BeckeJohnson(TB-mBJ)potential functional for electronics as well as magnetic characteristics,which lead to the consistent explanation of half-metallic ferromagnetism,representing the whole band-occupancy in material with exact detail of density of states(DOS).The stable FM state was examined in spinels due to the exchange splitting of Ho cation consisting of p-d hybridizations compatible with the result achieved for electronics band structure and ***,spin magnetic moment was explained in terms of anion,cation,and sharing charge on studied *** addition,the calculated thermoelectric properties clearly show that operation range of these systems may be utilized by future experimental works for identifying the potential applications of these systems.

关键词： Ho-based spinels DFT simulations Mechanical parameters electronic properties HM ferromagnetism Figure of merit

Meta-heuristics for Feature Selection and Classification in Diagnostic Breast Cancer

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Computers, Materials & Continua 2022年第10期73卷 749-765页

作者： Doaa Sami Khafaga Amel Ali Alhussan el-sayed M.el-kenawy Ali E.Takieldeen Tarek M.Hassan Ehab A.hegazy elsayed Abdel Fattah Eid Abdelhameed Ibrahim Abdelaziz A.Abdelhamid Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh11671Saudi Arabia Department of Communications and electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt Communications and Computers Engineering Department Faculty of EngineeringDelta University for Science and TechnologyInternational Coastal RoadGamasa CityDakhliyaEgypt Faculty of Applied Health Science Technology Delta University for Science and TechnologyMansoura35712Egypt Faculty of Medicine Head of Internal Medicine DepartmentDelta University for Science and TechnologyMansouraEgypt Computer Engineering and Control Systems Department Faculty of EngineeringMansoura University35516MansouraEgypt Department of Computer Science Faculty of Computer and Information SciencesAin Shams University11566CairoEgypt Department of Computer Science College of Computing and Information TechnologyShaqra University11961Saudi Arabia

One of the most common kinds of cancer is breast *** early detection of it may help lower its overall rates of *** this paper,we robustly propose a novel approach for detecting and classifying breast cancer regions in thermal *** proposed approach starts with data preprocessing the input images and segmenting the significant regions of *** addition,to properly train the machine learning models,data augmentation is applied to increase the number of segmented regions using various scaling *** the other hand,to extract the relevant features from the breast cancer cases,a set of deep neural networks(VGGNet,ResNet-50,AlexNet,and GoogLeNet)are *** resulting set of features is processed using the binary dipper throated algorithm to select the most effective features that can realize high classification *** selected features are used to train a neural network to finally classify the thermal images of breast *** achieve accurate classification,the parameters of the employed neural network are optimized using the continuous dipper throated optimization *** results show the effectiveness of the proposed approach in classifying the breast cancer cases when compared to other recent approaches in the ***,several experiments were conducted to compare the performance of the proposed approach with the other *** results of these experiments emphasized the superiority of the proposed approach.

关键词： Breast cancer image segmentation dipper throated optimization feature selection meta-heuristics

An interactive approach to investigate brightness perception of daylighting in Immersive Virtual Environments:Comparing subjective responses and quantitative metrics

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Building Simulation 2022年第1期15卷 41-68页

作者： Muhammad hegazy Kensuke Yasufuku Hirokazu Abe Graduate School of Engineering Osaka UniversityYamadaoka 2-1 Suita Osaka567-0047Japan Cybermedia Center Osaka UniversityJapan

Daylighting plays an eminent role in the performance of indoor environments and their occupants,thus necessitating the need to investigate daylight perception of potential occupants at early design *** present study introduces an interactive approach to collect and visualize brightness perception of daylighting in a large-scale immersive virtual environment using a game engine as a daylight simulation *** developed system allows users to explore building models freely at different day times set in virtual reality and report their perceptions in real *** a validation study(N=36)to investigate the consistency of brightness perceptions in a real environment and its virtual replica,a set of 24 participants were recruited to use the system to report their brightness perception in a virtual model of a daylit art museum,through snapshotting the scenes where they perceive as one of the following in terms of daylighting:(very dark,dark,bright,or very bright).Using an output of 419 snapshots,a"Perceptual Light Map"(PLM)was developed to visualize the collective brightness perception of participants as a heat *** responses were found to be positively correlated with four daylight metrics,with the highest correlation to mean luminance and the lowest to luminance *** findings of this exploratory study represent a step towards a user-oriented supplement tool to the existing quantitative daylight metrics,validating game engines’adequacy as a daylight simulation tool,and illustrating the potentials of immersion and interaction principles for the perception of daylit spaces in virtual reality.

关键词： immersive virtual environment daylighting game engine human perception mean luminance

Optimal Tuning of FOPID-Like Fuzzy Controller for High-Performance Fractional-Order Systems

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Computers, Materials & Continua 2022年第1期70卷 171-180页

作者： Ahmed M.Nassef hegazy Rezk College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityAl-Kharj11911Saudi Arabia Department of Computers and Automatic Control Engineering Faculty of EngineeringTanta UniversityTanta31733Egypt Department of electrical Engineering Faculty of EngineeringMinia UniversityMinia61517Egypt

This paper addresses improvements in fractional order(FO)system *** the classical proportional-integral-derivative(PID)-like fuzzy controller can provide adequate results for both transient and steady-state responses in both linear and nonlinear systems,the FOPID fuzzy controller has been proven to provide better *** high performance was obtained thanks to the combinative benefits of FO and fuzzy-logic *** paper describes how the optimal gains and FO parameters of the FOPID controller were obtained by the use of a modern optimizer,social spider optimization,in order to improve the response of fractional dynamical *** group of systems had usually produced multimodal error surfaces/functions that occasionally had many variant local *** integral time of absolute error(ITAE)used in this study was the error *** results showed that the strategy adopted produced superior performance regarding the lowest ITAE *** reached a value of 88.22 while the best value obtained in previous work was 98.87.A further comparison between the current work and previous studies concerning transient-analysis factors of the model’s response showed that the strategy proposed was the only one that was able to produce fast rise time,low-percentage overshoot,and very small steady-state ***,the other strategies were good for one factor,but not for the others.

关键词： Fuzzy-logic control fractional-order systems parameter estimation optimization

Male genitourinary schistosomiasis-related symptoms among long-term Western African migrants in Spain: a prospective population-based screening study

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贫困所致传染病(英文) 2024年第2期13卷 1-10页

作者： Roure Sílvia Vallès Xavier Pérez-Quílez Olga López-Mu?oz Israel Chamorro Anna Abad elena Valerio Lluís Soldevila Laura Espa?a Sergio hegazy Alaa H. A. Fernández-Rivas Gema Gorriz Ester Herena Dolores Oliveira Mário Miralles Maria Carme Conde Carmen Montero-Alia Juan José Fernández-Pedregal elia Miranda-Sánchez Jose Llibre Josep M. Isnard Mar Bonet Josep Maria Estrada Oriol Prat Núria Clotet Bonaventura The Schisto-Stop study group International Health Program (PROSICS) Barcelona North Metropolitan Territorial Directorate for Infectious Diseases Catalan Institute for Health CAP La Salut Passatge dels Encants S/N Badalona Spain Fundació Lluita contra les Infeccions c/Can Ruti s/n Badalona Spain Infectious Diseases Department Hospital Universitari Germans Trias i Pujol c/Can Ruti s/n Badalona Spain Germans Trias i Pujol Research Institute c/Can Ruti s/n Badalona Spain Microbiology Department Germans Trias i Pujol University Hospital c/Can Ruti s/n Badalona Spain Department of Genetics and Microbiology Universitat Autònoma de Barcelona c/Can Ruti s/n Badalona Spain Faculty of Medicine University of Asyut El Fateh Assiut Governorate Egypt Department of Urology Germans Trias i Pujol University Hospital c/Can Ruti s/n Badalona Spain Canovelles Primary Health Care Unit Barcelona North Metropolitan Health Directorate Catalan Institute for Health C/Indústria Canovelles Spain Primary Health Care Unit Mataró-(Rocafonda-Palau) Barcelona North Metropolitan Health Directorate Catalan Institute for Health Camí Ral el Ravalet Mataró Barcelona Spain Barcelona North Metropolitan Primary Care Directorate Catalan Institute for Health Ctra. de Barcelona Sabadell Barcelona Spain Directorate for Innovation and Interdisciplinary Cooperation Barcelona North Metropolitan Health Directorate Catalan Institute for Health C/Can Ruti S/N Badalona Spain IrsiCaixa-AIDS Research Institute Hospital Universitari Germans Trias i Pujol University Hospital c/Can Ruti s/n Badalona Spain Infectious Diseases Directorate Barcelona North Metropolitan Health Directorate Catalan Institute for Health C/Can Ruti S/N Badalona Spain

Background Schistosomiasis is highly endemic in sub-Saharan Africa and frequently imported to Europe. Male urogenital manifestations are often neglected. We aimed to ascertain the prevalence of genitourinary clinical signs and symptoms among long-term African migrants in a non-endemic European country using a serology *** We carried out a prospective, community-based cross-sectional study of adult male migrants from sub-Saharan Africa living in *** serology tests and microscopic urine examinations were carried out, and clinical data were obtained from an electronic medical record search and a structured *** We included 388 adult males, mean age 43.5 years [Standard Deviation (SD) = 12.0, range: 18–76]. The median time since migration to the European Union was 17 [Interquartile range (IQR): 11–21] years. The most frequent country of origin was Senegal (N = 179, 46.1%). Of the 338, 147 (37.6%) tested positive forSchistosoma. Parasite eggs were present in the urine of only 1.3%. Nine genitourinary clinical items were significantly associated with positiveSchistosoma serology results: pelvic pain (45.2%;OR = 1.57, 95%CI: 1.0–2.4), pain on ejaculation (14.5%;OR = 1.85, 95%CI: 1.0–3.5), dyspareunia (12.4%;OR = 2.45, 95%CI: 1.2–5.2), erectile dysfunction (9.5%;OR = 3.10, 95%CI: 1.3–7.6), self-reported episodes of infertility (32.1%;OR = 1.69, 95%CI: 1.0–2.8), haematuria (55.2%;OR = 2.37, 95%CI: 1.5–3.6), dysuria (52.1%;OR = 2.01, 95%CI: 1.3–3.1), undiagnosed syndromic STIs (5.4%), and orchitis (20.7%;OR = 1.81, 95%CI: 1.0–3.1). Clinical signs tended to *** Urogenital clinical signs and symptoms are prevalent among male African long-term migrants with a positiveSchistosoma serology results. Genital involvement can be frequent even among those with long periods of non-residence in their sub-Saharan African countries of origin. Further research is needed to develop diagnostic tools and validate therapeutic approaches to

关键词： Schistosomiasis Chronic schistosomiasis Urogenital schistosomiasis Male genital schistosomiasis Longterm migrant

Innovative surfactant of Gemini-type for dissolution mitigation of steel in pickling HCl medium

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Chinese Journal of Chemical Engineering 2021年第6期34卷 125-133页

作者： Medhat Kamel Mohamed hegazy Salah Rashwan Mohamed el Kotb Department of Chemistry Faculty of ScienceSuez Canal UniversityIsmailia 41522Egypt Egyptian Petroleum Research Institute(EPRI) Nasr CityCairo 11727Egypt

A new surfactant of Gemini-type,N,N'-((phthylbis(oxy))bis(ethane-2,1-diyl))bis(N,N-dimethyldodecan-1-aminium bromide)is prepped&*** dissolution suppression impact of the new compound on steel is performed in 1 mol·L^(-1)HCl environment by means of chemical and electrochemical *** prepared surfactant is an agreeable dissolution inhibitor for *** mitigation efficacy rises with the quantity of the *** surfactant belongs to inhibitors of *** adsorption of the synthesized compound followed the Langmuir's *** negative magnitudes of bothΔG_(ads)^(θ) andΔH^(adsθ)indicate that the adsorption process proceeds from its own accord and *** mechanism of adsorption is elucidated by scanning *** is established that the transfer resistance(R_(ct))value rose,where the value of the phase element(CPE)reduced with the amount of synthesized *** to the experimental data arrived by surface tension measurements,the prepared compound is a powerful active agent at the air/water boundary.

关键词： Innovative Gemini surfactant Synthesis Dissolution mitigation Steel Pickling HCl media

Effect of probiotics on pro-inflammatory cytokines and NF-κB activation in ulcerative colitis

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World Journal of Gastroenterology 2010年第33期16卷 4145-4151页

作者： Sahar K hegazy Mohamed M el-Bedewy Department of Clinical Pharmacy Faculty of PharmacyTanta University Internal Medicine Faculty of MedicineTanta University

AIM:To demonstrate the therapeutic effect of probiotics in patients with ulcerative colitis(UC),and their effect on inflammatory mediators and nuclear factor(NF)κB activation in these ***:Thirty patients with mild to moderate UC were randomly classified into two groups:sulfasalazine group,who received sulfasalazine 2400 mg/d;and probiotic group,who received sulfasalazine 2400 mg/d with *** patients were investigated before and after 8 wk of treatment with probiotic(Lactobacillus delbruekii and Lactobacillus fermentum).Colonic activity of myeloperoxidase(MPO)was assayed with UV spectrophotometry,the colonic content of interleukin(IL)-6 was determined by enzyme-linked immunosorbent assay(elISA),fecal calprotectin was determined by elISA,and expression of NF-κB p65 and tumor necrosis factor (TNF)-αproteins in colonic tissue was identified by immunohistochemistry and reverse transcription polymerase chain reaction,***:At the start of the study,colonic mucosal injury and inflammation were demonstrated in UC patients by hematoxylin and eosin staining,and an increase in colonic MPO activity,fecal calprotectin,and expression of colonic TNF-αand NF-κB p65 *** use of probiotic for 8 wk significantly ameliorated the inflammation by decreasing the colonic concentration of IL-6,expression of TNF-αand NF-κB p65,leukocyte recruitment,as demonstrated by a decrease in colonic MPO activity,and the level of fecal calprotectin compared to sulfasalazine group and the control group(Pelpful in maintaining remission and preventing relapse of UC.

关键词： Ulcerative colitis Probiotics Interleukin-6 Nuclear factor-κB

What’s old is new again:Insights into diabetic foot microbiome

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World Journal of Diabetes 2023年第6期14卷 680-704页

作者： Azza A H Rajab Wael A H hegazy Department of Microbiology and Immunology Faculty of PharmacyZagazig UniversityZagzig 44511Egypt

Diabetes is a chronic disease that is considered one of the most stubborn global health problems that continues to defy the efforts of scientists and *** prevalence of diabetes in the global population continues to grow to alarming levels year after year,causing an increase in the incidence of diabetes complications and health care costs all over the *** major complication of diabetes is the high susceptibility to infections especially in the lower limbs due to the immunocompromised state of diabetic patients,which is considered a definitive factor in all *** foot infections continue to be one of the most common infections in diabetic patients that are associated with a high risk of serious complications such as bone infection,limb amputations,and life-threatening systemic *** this review,we discussed the circumstances associated with the high risk of infection in diabetic patients as well as some of the most commonly isolated pathogens from diabetic foot infections and the related virulence *** addition,we shed light on the different treatment strategies that aim at eradicating the infection.

关键词： Diabetic foot infection Chronic ulcer Bacterial biofilm Multidrug resistance Methicillin resistant Staphylococcus aureus Vancomycin resistance

Keratitis caused by Nocardia farcinica in a contact lens wearer

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Infectious Medicine 2022年第2期1卷 143-145页

作者： Shaymaa hegazy Tung Phan Department of Pathology University of PittsburghPittsburghPAUSA

Bacterial keratitis is an infection of the *** kind of infection can progress quickly and if left untreated,it can eventually cause complete *** Staphylococcus aureus and Pseudomonas aeruginosa are most commonly responsible for this type of infection in the United States,Nocardia *** rarely *** we describe an interesting case of Nocardia farcinica keratitis in a 31-year-old male patient having an extended wear of contact *** patient presented at the emergency department with irritation,foreign body sensation,redness,and pain of his left *** farcinica was isolated from a corneal scraping specimen,and determined by sequencing a region of 16S rRNA *** patient had antimicrobial therapy with good *** highlight the important role of Nocardia farcinica in causing keratitis,and its accurate and timely diagnosis is needed to avoid poor visual outcomes.

关键词： Keratitis Nocardia farcinica Contact lenses Sequencing