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Influence of Y^(3+),Yb^(3+),Gd^(3+) cations on structural and electromagnetic properties of CuFe_(2)O_(4) nanoferrites prepared via one step sol-gel method

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Journal of Rare Earths 2021年第10期39卷 1224-1231,I0003页

作者： Aleena Kiran majid Niaz Akhtar muhammad Yousaf khalid mujassam Batoo Omar mAldossary Salman Naeem Khan Department of Physics COMSATS University IslamabadLahore CampusDefence Road Off RaiwindLahore54000Pakistan Department of Physics Mohammad Nawaz Sharif University of Engineering and TechnologyMultan60000Pakistan School of Energy and Environment Southeast UniversityNo2 Si Pai LouNanjing 210096China King Abdullah Institute for Nanotechnology King Saud UniversityP.O.Box 2455Riyadh11458Saudi Arabia Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box-2455Riyadh11451Saudi Arabia micro-mm Wave Laboratory(m2L) Department of PhysicsCOMSATS University IslamabadLahore CampusDefence Road Off RaiwindLahore54000Pakistan

Rare earths(REs) play a key role in distorting spinel structure by creating some defects at the lattice sites and make them suitable for magnetodielectric *** the present study,the nanoferrites of CuRE0.02Fe1.98O4,where REs=Y^(3+),Yb^(3+),Gd^(3+),were prepared using one step sol-gel *** prepared samples are copper ferrite(CFO),yttrium doped copper ferrite(Y-CFO),ytterbium doped copper ferrite(Yb-CFO) and gadolinium doped copper ferrite(Gd-CFO),*** single-phase structure of all the REs doped nanoferrites was determined by X-ray diffraction(XRD) *** porosity,agglomerations and grain size of the REs doped copper ferrite were examined using field emission scanning electron microscopy(FESEm) *** transform infrared spectroscopy(FTIR)elaborates the phase formation and environmental effects on the REs doped nanoparticles(NPs).The recorded room temperature m-H loops from a vibrating sample magnetometer(VSm) elucidate the magnetic properties of the REs doped spinel *** magnetic saturation(ms) was calculated in the range of 23.08 to 51.78 emu/*** calculated coercivity values(272.6 to 705.60 Oe) confirm the soft magnetic behavior of REs doped copper ***,the electromagnetic and dielectric properties were assessed using a Vector network analyzer(VNA) from 1 to 6 *** permeability,permittivity,dielectric tangent loss and electric modulus of the REs doped spinel ferrites illustrate that the prepared NPs may be suitable for microwave and high frequency applications.

关键词： Rare earth elements Nanoparticles Spinel ferrites VSm VNA magnetodielectric applications

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Oral administration of moringa oleifera leaf powder relieves oxidative stress,modulates mucosal immune response and cecal microbiota after exposure to heat stress in New Zealand White rabbits

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Journal of Animal Science and Biotechnology 2021年第4期12卷 1468-1482页

作者： Talat Bilal Yasoob Defu Yu Abdur Rauf khalid Zhen Zhang Xiaofeng Zhu Heba m.Saad Suqin Hang National Center for International Research on Animal Gut Nutrition Nanjing Agricultural UniversityNo.1 WeiGangXuanwu regionNanjing 210095JiangsuChina Laboratory of Gastrointestinal microbiology College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095China Faculty of Agricultural Sciences Ghazi UniversityDera Ghazi Khan 32200Pakistan Department of Livestock and Poultry Production Faculty of Veterinary SciencesBahauddin Zakariya UniversityMultan 60000Pakistan

Background:Heat stress(HS)disrupts the gut barrier allowing the uptake of lipopolysaccharide(LPS)and leads to an inflammatory response and changes in gut microbiota *** oleifera leaf powder(mOLP)has been proposed to combat HS,yet its alleviate role is currently under *** current study investigated the effects of chronic HS and mOLP supplementation on changes in redox status and immune response of cecal mucosa along with alteration in cecal ***:A total of 21 young New Zealand White(NZW)rabbits(male)about 32 weeks old(mean body weight of 3318±171 g)reared on a commercial pelleted diet were employed;divided into three groups(n=7):control(CON,25°C),heat stress(HS,35°C for 7 h daily),and HS supplemented orally with mOLP(HSm,35°C)at 200 mg/kg body weight per day for 4 ***:The results demonstrated that mOLP supplementation increased organ index of cecal tissue compared with the HS group(P>0.05).Levels of malonaldehyde(mDA)and activity of superoxide dismutase(SOD)as well as lactate dehydrogenase(LDH)were reduced in the cecal mucosa of the HSm group compared with the HS *** downregulated the contents of cecal mucosa LPS,several inflammatory markers(TNF-α/IL-1α/IL-1β),and myeloperoxidase(mPO)in the HSm group(Pmmunoglobulin A(SIgA)was increased in the HSm group compared with the HS group(Pme of cecal mucosa showed that mOLP reduced gene expression relative to several immune factors,including IL-10,IFNG,and RLA,whereas both HS and mOLP increased the gene expression of fat digestion and absorption pathway,including APOA1,FABP1,FABP2,mTTP,andLOC100344166,compared to the CON group(Pm level,the relative abundance of Proteobacteria was increased by HS,while Actinobacteria was significantly increased by HSm compared to other groups(Pm groups compared to CON and HS groups(P<0.05).Higher butyrate conce

关键词： Cecal microbiota Heat stress moringa oleifera leaf powder Rabbits Short chain fatty acids

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Sentinel-2 Satellite Imagery Application to monitor Soil Salinity and Calcium Carbonate Contents in Agricultural Fields

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Phyton-International Journal of Experimental Botany 2023年第5期92卷 1603-1620页

作者： Ahmed m.Zeyada khalid A.Al-Gaadi ElKamil Tola Rangaswamy madugundu Ahmed A.Alameen Department of Agricultural Engineering College of Food and Agriculture SciencesKing Saud UniversityRiyadh11451Saudi Arabia Precision Agriculture Research Chair Deanship of Scientific ResearchKing Saud UniversityRiyadh11451Saudi Arabia

The estuary tides affect groundwater dynamics;these areas are susceptible to waterlogging and salinity issues.A study was conducted on two fields with a total area of 60 hectares under a center pivot irrigation system that works with solar energy and belong to a commercial farm located in Northern *** monitor soil salinity and calcium carbonate in the area and stop future degradation of soil resources,easy,non-intrusive,and practical procedures are *** objective of this study was to use remote sensing-determined Sentinel-2 satellite imagery using various soil indices to develop prediction models for the estimation of soil electrical conductivity(EC)and soil calcium carbonate(CaCO_(3)).Geo-referenced soil samples were collected from 72 locations and analyzed in the laboratory for soil EC and CaCO_(3).The electrical conductivity of the soil saturation paste extract was represented by average values in soil dataset samples from two fields collected from the topsoil layer(0 to 15 cm)characteristic of the local salinity *** various soil indices,used in this study,were calculated from the Sentinel-2 satellite *** prediction was determined using the root mean square error(RmSE)and cross validation was done using coefficient of *** results of regression analysis showed linear relationships with significant correlation between the EC analyzed in laboratory and the salinity index-2“SI2”(model-1:R^(2)=0.59,p=0.00019 and root mean square error(RmSE=1.32%)and the bare soil index“BSI”(model-2:R^(2)=0.63,p=0.00012 and RmSE=6.42%).model-1 demonstrated the best model for predicting soil EC,and validation R^(2)and RmSE values of 0.48%and 1.32%,*** regression analysis results for soil CaCO_(3)determination showed linear relationships with data obtained in laboratory and the bare soil index“BSI”(model-3:R^(2)=0.45,p=0.00021 and RmSE=1.29%)and the bare soil index“BSI”&Normalized difference salinity index“NDSI”(model-4:R^(2)=0.53,

关键词： Electrical conductivity modeling soil indices remote sensing prediction

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New soliton solutions of Dual mode Sawada Kotera equation using a new form of modified Kudryashov method and the finite difference method

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Journal of Ocean Engineering and Science 2024年第3期9卷 207-215页

作者： khalid K.Ali m.S.mehanna Abdel-Haleem Abdel-Aty Abdul-majid Wazwaz Department of mathematics Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Faculty of Engineering MTI UniversityCairoEgypt Department of Physics College of SciencesUniversity of BishaPO Box 344Bisha 61922Saudi Arabia Physics Department Faculty of ScienceAl-Azhar UniversityAssiut 71524Egypt Department of mathematics Saint Xavier UniversityChicagoIL 60655USA

In this article,we suggest a new form of modified Kudryashov’s method(NmK)to study the Dual-mode Sawada Kotera *** know very well that the more the solutions depend on many constants,the easier it is to study the model better by observing the change in the constants and what their impact is on the *** this point of view,we developed the modified Kudryashov method and put it in a general form that contains more than one controllable *** have studied the model in this way and presented figures showing the correctness of what we hoped to reach from the proposed *** addition to the results we reached,they were not sufficient,so we presented an extensive numerical study of this model using the finite differences *** also came up with the local truncation error for the difference scheme is h^(6) k^(2)(1+k^(2)).In addition,the analytical solutions we reached were compared with the numerical solutions,and we presented many forms that show that the results we reached are a clear contribution to this field.

关键词： Soliton solution A new form of analytical method Local truncation error Numerical solutions

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Effect of medium Acidity and Photostability of 3-（4-Dimethyl- amino-phenyl）-l-（2,5-dimethyl-thiophen-3-yl）-propenone （DDTP）： A New Green Emitting Laser Dye

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Chinese Journal of Chemistry 2011年第11期29卷 2557-2561页

作者： EI-Daly, Samy A Asiri, Abdullah m. Khan, Salman A. Alamry, khalid A. Hussein, mahmoud A. Chemistry Department Faculty of Science King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia Department of Chemistry Faculty of Science Tanta University 31527 Tanta Egypt The Center of ExcellenceforAdvanced materials King Abdul Aziz University Jeddah 21589 P.O. Box 80203 Saudi Arabia Polymer Chemistry Lab Chemistry Department Faculty of Science Assiut University Assiut 71516 Egypt

On the line of a previous work on the spectral properties of some of heteroaryl chalcone, the effect of medium acidity and photoreactivity of 3-（4-dimethylamino-phenyl）-l-（2,5-dimethyl-thiophen-3-yl）-propenone （DDTP） has been investigated in dimethylformamide and in chloromethane solvents such as methylenechloride, chloroform and carbon tetrachloride. The dye solution （ca. 5×10^-4 mol·L^-1 in DmF） gives a good laser emission in the range 470 --560 nm with emission maximum at 515 nm upon pumping by nitrogen laser （λex=337.1 nm）. The laser parameters such as gain coefficient （a）, emission cross section （Cre） and half life energy （E1/2） at maximum laser emission are also determined.

关键词： 3-(4-dimethylamino-phenyl)-1-(2,5-dimethyl-thiophen-3-yl)-propenone laser dyes effect of acidity possibility

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modeling the dynamics of COVID-19 with carrier effect and environmental contamination

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International Journal of modeling, Simulation, and Scientific Computing 2021年第3期12卷 167-182页

作者： khalid Hattaf Ahmed A.mohsen Jamal Harraq Centre Regional des m´etiers de l’Education et de la Formation(CRmEF)20340 Derb Ghalef CasablancaMorocco Laboratory of Analysis modeling and Simulation(LAmS)Faculty of Sciences Ben m’sik Hassan II University of Casablanca P.O.Box 7955 Sidi Othman Casablanca Morocco Department of mathematics College of Education for Pure Science(Ibn Al-Haitham)University of Baghdad Iraq ministry of Education Rusafa 1BaghdadIraq

Nowadays,coronavirus disease 2019(COVID-19)poses a major threat to humanity which is caused by a novel coronavirus in Wuhan,China,at the end of December *** novel coronavirus named the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)according to the International Committee on Taxonomy of Viruses(ICTV).It spreads directly through close contact with an asymptomatic(carrier)or symptomatic person who is coughing,sneezing,talking,singing and *** also spreads indirectly through contact with an environment contaminated by viral particles of *** the absence of effective treatment against COVID-19,awareness can play an important role in reducing cases of *** this study,we develop a mathematical model to better describe the dynamics of COVID-19 by taking into account the above modes of transmission and the prosocial *** existence,uniqueness,positivity and boundedness of solutions of the model are *** possible equilibrium points are *** local asymptotic stability of these equilibrium points is *** Lyapunov functionals are constructed to investigate the global dynamics of the model.

关键词： COVID-19 awareness asymptomatic people environmental transmission mathematical modeling

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A new record of Pluteaceae(Agaricales)from Pakistan

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Studies in Fungi 2021年第1期6卷 514-518页

作者： Khan mB Ishaq m Fiaz m Saba m Wenhua L Galappaththi mCA khalid AN Department of Botany Hazara University MansehraPakistan Department of Plant Sciences Quaid-i-Azam UniversityIslamabad-45320Pakistan Center for mountain Futures Kunming Institute of BotanyChinese Academy of ScienceKunmingP.R.China Postgraduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka University of the Punjab Institut of BotanyQuaid-i-Azam Campus-54590LahorePakistan

During a survey of agarics from the Himalayan moist temperate regions in Pakistan,a new record Volvariella taylorii was *** description,color images of basidiocarps,drawings of microscopic features,and a phylogenetic ... 详细信息

关键词： phylogeny pink gills taxonomy volva Volvariella taylorii

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Ontological model for Cohesive Smart Health Services management

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Computers, materials & Continua 2023年第2期74卷 3679-3695页

作者： muhammad Raza Naqvi muhammad Waseem Iqbal Syed Khuram Shahzad m.Usman Ashraf khalid Alsubhi Hani moaiteq Aljahdali Le Laboratoire Génie de Production de l’École Nationale d’Ingénieurs de Tarbes(LGP-INP-ENIT) Universitéde ToulouseCEDEXTarbes65016France Department of Software Engineering Superior UniversityLahore53700Pakistan Department of Informatics&Systems University of Management&TechnologyLahore54000Pakistan Department of Computer Science University of Management and TechnologySialkot51310Pakistan Department of Computer Science King Abdul-Aziz UniversityJeddah21577Saudi Arabia Faculty of Computing and Information Technology King Abdulaziz UniversityJeddah21577Saudi Arabia

Health care has become an essential social-economic concern for all stakeholders(e.g.,patients,doctors,hospitals etc.),health needs,private care and the elderly class of *** massive increase in the usage of health care Internet of things(IoT)applications has great technological evolvement in human *** are various smart health care services like remote patient monitoring,diagnostic,disease-specific remote treatments and *** applications are available in a split fashion and provide solutions for variant diseases,medical resources and remote service *** main objective of this research is to provide a management platform where all these services work as a single unit to facilitate the *** ontological model of integrated healthcare services is proposed by getting requirements from various existing healthcare *** were 26 smart health care services and 26 smart health care services to classify the knowledge-based ontological *** proposed ontological model is derived from different classes,relationships,and constraints to integrate health care *** model is developed using Protégébased on each interrelated/correlated health care service having different *** querying SPARQL protocol and RDF query language(SPARQL)were used for knowledge *** Pellet Reasoner is used to check the validity and relations coherency of the proposed ontology *** to other smart health care services integration systems,the proposed ontological model provides more cohesiveness.

关键词： Ontology internet of things smart health services integration

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Optimized Weighted Ensemble Using Dipper Throated Optimization Algorithm in metamaterial Antenna

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Computers, materials & Continua 2022年第12期73卷 5771-5788页

作者： Doaa Sami Khafaga El-Sayed m.El-kenawy Faten khalid Karim Sameer Alshetewi Abdelhameed Ibrahim Abdelaziz AAbdelhamid Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt General Information Technology Department Ministry of DefenseThe Executive AffairsExcellence Services DirectorateRiyadh11564Saudi Arabia Computer Engineering and Control Systems Department Faculty of EngineeringMansoura UniversityMansoura35516Egypt Department of Computer Science Faculty of Computer and Information SciencesAin Shams UniversityCairo11566Egypt Department of Computer Science College of Computing and Information TechnologyShaqra University11961Saudi Arabia

metamaterial Antennas are a type of antenna that uses metamaterial to enhance *** bandwidth restriction associated with small antennas can be solved using metamaterial *** learning is gaining popularity as a way to improve solutions in a range of *** learning approaches are currently a big part of current research,and they’re likely to be huge in the *** model utilized determines the accuracy of the prediction in large *** goal of this paper is to develop an optimized ensemble model for forecasting the metamaterial antenna’s bandwidth and *** basic models employed in the developed ensemble are Support Vector Regression(SVR),K-NearestRegression(KNR),multi-Layer Perceptron(mLP),Decision Trees(DT),and Random Forest(RF).The percentages of contribution of these models in the ensemble model are weighted and optimized using the dipper throated optimization(DTO)*** choose the best features from the dataset,the binary(bDTO)algorithm is *** proposed ensemble model is compared to the base models and results are recorded and analyzed *** addition,two other ensembles are incorporated in the conducted experiments for *** ensembles are average ensemble and K-nearest neighbors(KNN)-based *** comparison is performed in terms of eleven evaluation *** evaluation results confirmed the superiority of the proposed model when compared with the basic models and the other ensemble models.

关键词： metamaterial antenna dipper throated optimization feature selection parameters prediction

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Evaluation of Landsat 8 image pansharpening in estimating soil organic matter using multiple linear regression and artificial neural networks

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Geo-Spatial Information Science 2022年第3期25卷 353-364页

作者： Abdelkrim Bouasria khalid Ibno Namr Abdelmejid Rahimi El mostafa Ettachfini Badr Rerhou Faculty of Sciences Chouaib Doukkali UniversityEl JadidaMorocco Agricultural Development Department Doukkala Regional Agricultural Development OfficeEl JadidaMorocco Soil Science Department Hassan II Agronomic and Veterinary InstituteRabatMorocco

In agricultural systems,the regular monitoring of Soil Organic matter(SOm)dynamics is *** task is costly and time-consuming when using the conventional method,especially in a very fragmented area and with intensive agricultural activity,such as the area of Sidi *** study area is located in the Doukkala irrigated perimeter in *** data can provide an alternative and fill this gap at a low *** to predict SOm from a satellite image,whether linear or nonlinear,have shown considerable *** study aims to compare SOm prediction using multiple Linear Regression(mLR)and Artificial Neural Networks(ANN).A total of 368 points were collected at a depth of 0-30 cm and analyzed in the *** image at 15 m resolution(mSPAN)was produced from a 30 m resolution(mS)Landsat-8 image using image pansharpening processing and panchromatic band(15 m).The results obtained show that the mLR models predicted the SOm with(training/validation)R^(2)values of 0.62/0.63 and 0.64/0.65 and RmSE values of 0.23/0.22 and 0.22/0.21 for the mS and mSPAN images,*** contrast,the ANN models predicted SOm with R2 values of 0.65/0.66 and 0.69/0.71 and RmSE values of 0.22/0.10 and 0.21/0.18 for the mS and mSPAN images,*** pansharpening improved the prediction accuracy by 2.60%and 4.30%and reduced the estimation error by 0.80%and 1.30%for the mLR and ANN models,respectively.

关键词： Digital soil mapping soil organic matter remote sensing multiple linear regression artificial neural networks irrigated area Doukkala morocco

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