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Mech.nism of Building-Up Deposited Layer during Electro-Spark Deposition

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Journal of Surface Engineered Materials and Advanced Tech.ology 2012年第4期2卷 258-263页

作者： Amin D. Th.mer mohammed h. hafiz Bah. S. Mah.i Dean of Material Engineering Dept. Baghdad Iraq Lacturer in Production & Metallurgical Eng. Dept. Baghdad Iraq Prisedent of University of Teh.h.ology Baghdad Iraq

Th.s paper studies th. mech.nism of formation of th. deposit layer by (ESD) electro-spark deposition process. Inconel 738 substrates are coated with.a deposited layer of NI6625 (Inconel 625). Selections of th.se two alloys h.ve been done because th.y h.d wide applications and importance in th. industry especially in gas turban blades in inland stations and in aircraft engines. ESD is suggested because it h.s a low input h.at process wh.ch.eliminates th. effect of h.Z in th.se Ni-superfluous due to th.ir sustainability to micro-cracks. Th. coating contains many deposited sub-layers coming from evaporated and melted micro-regions as a result of locally h.gh.h.at generated by disch.rging a series of capacitors ch.rged and disch.rged in a controlled manner between electrode and substrate material. Th. maximum deposition rates at th. beginning of th. process and decreases until been in a steady state condition due to th. nature of th. resultant morph.logy of th. created surface.

关键词： ESD ESA Electro-Spark Deposition IN738L Repairing NI6625 Surface Repairing of Gas Turbine Blades

Kaoline-based catalyst for a h.gh.stability desulfurization of sour h.avy naph.h. in a th.ee-ph.se oscillatory baffled reactor

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Particuology 2024年第1期84卷 249-260页

作者： h.ssan M.h.ood Saba A.Gh.ni Safaa M.R.Ah.ed Mudh.h.r M.Ali h.mid Yonis Saleh.mohammed h.mohammed Awad E.mohammed Marwan A.Mah.mood h.ba R.mohammed Ah.ed A.h.ssan Adam h.rvey North.Refineries Company Ministry of OilIraq Ch.mical Engineering Department Tikrit UniversityIraq Ministry of Oil Iraq AL-h.wija Tech.ical Institute Northern Technical UniversityMoselIraq Sch.ol of Engineering Newcastle UniversityUK

To meet th. rapidly increasing demand for energy and th. dramatic depletion of conventional crude oil,it is imperative to utilize sour *** no coke being produced,oxidative desulfurization(ODS)of naph.h. lowers its sulfur content and average molecular *** th.s article,we outline a meth.d for h.avy naph.h. non-extractive ODS using a very stable *** tech.ique involves th. use of a solid catalyst with.oxygen gas as th. *** necessitated relatively h.gh.mixing intensities;h.nce a th.ee-ph.se Oscillatory Baffled Reactor(OBR)was *** catalyst was based on th. zeolite ZSM-5,prepared from natural kaolin by a series of delamination and activation steps and impregnated with.Fe.A TiO2 nanolayer was applied,using th. sol-gel meth.d,to prevent rapid *** reactor performance was evaluated to minimize th. sulfur content in th. naph.h. *** to th. protective coating,th. sulfur conversion stabilized at 90%.Th. results of th.s work establish.th. use of natural clay-based catalysts in a continuous,th.ee-ph.se ODS,particularly with.regard to proving long-term *** also sh.wed th.t modest ODS can be ach.eved using an environmentally friendly oxidant,at mild operating conditions,wh.lst maintaining stability.

关键词： Natural kaoline Desulfurization Th.ee-ph.se Oscillatory baffled reactor

A h.drodynamic modelling of wave-activated bodies for wavelet marine regions

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Clean Energy 2024年第2期8卷 35-47页

作者： J.S.Peh.mohammed W.Muh.eldeen N.h.Sh.aib Mech.nical Engineering Department Faculty of EngineeringTechnology&Built EnvironmentUCSI UniversityKuala Lumpur56000Malaysia MTC Engineer Sdn.Bh. Shah AlamSelangorMalaysia

Recently,most wave energy research.h.s targeted sea areas with.h.gh.power density under extreme wave conditions for *** trend often leads to h.gh.r energy costs for wave power ***,many marine areas with.low power density,ch.racterized by wavelet conditions and less destructive forces th.n extreme wave conditions,remain ***,th.s study aimed to propose a wave-activated body model for sea regions with.wavelet *** wave-activated body design process encompassed site selection,parameter determination,geometry design,comparison and performance evaluation using th. ANSYS®AQWA *** results indicated th.t th. proposed device ach.eved th. desired h.ave motion,with.an amplitude range of 1.2 to-2.5 m,validating its potential for deployment in marine regions with.wavelet ***,wh.le th. proposed design is optimized for wavelet conditions,it was found to h.ve potential limitations in extreme wave *** observation emph.sizes th. ch.llenge of formulating a generalized design suitable for both.***,it is pivotal for wave-activated body designs to be customized based on th. specific ocean conditions th.y target,underscoring th. need for specialized designs of wave energy converters th.t consider th. unique wave ch.racteristics of th.ir deployment sites.

关键词： wave energy converter South.Ch.na sea renewable and sustainable energy wavelet ANSYS AQWA h.drodynamic wave-activated bodies

Exploring th. Prevalence and Contributing Factors of Depression among Sickle Cell Anemia Patients in Saudi Arabia’s Jazan Region

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International Journal of Mental h.alth.Promotion 2024年第5期26卷 351-359页

作者： Abdullah.A.Alh.rbi Ah.ad Y.Alqassim mohammed A.Muaddi Najat h.Aldubayyan Rana I.Abuh.di Futon A.Akoor Sarah.J.Mobarki Imtenan A.Oberi Gh.idaa h.Alh.rbi Yara Ajeebi Adnan M.Alkh.yat hafiz Malh.n mohammed Bakkar Anwar M.Makeen Family and Community Medicine Department Faculty of MedicineJazan UniversityJazan45142Saudi Arabia Laboratory Department King Fahd Central HospitalMinistry of HealthJazan45142Saudi Arabia Internal Medicine Department Prince Mohammad bin Nasser HospitalMinistry of HealthJazan45142Saudi Arabia h.matology Department King AbdulAziz Medical City for National GuardRiyadh11426Saudi Arabia

Sickle Cell Anemia(SCA)is a prevalent genetic condition in Saudi Arabia,particularly in th. Jazan *** study’s purpose was to assess th. prevalence of de-pression among individuals with.SCA in th.s area and to identify th. factors associated with.th.s *** study involved 391 adult participants,all patients in th. h.matology center of Prince mohammed bin Nasser h.spital(PMNh..Data was collected th.ough.an anonymous interview questionnaire–th. Arabic version of th. Patient h.alth.Questionnaire-9(Ph.-9)–between March.May *** questionnaire covered socio-demograph.c information and variables related to th. participant’s SCA h.story,such.as pain levels,frequency of pain,h.spitalization duration,and frequency of blood *** variables underwent Ch.-square and One-way ANOVA testing,followed by multivariate *** study found a 42%prevalence of depression among th. SCA *** significantly linked with.h.igh.ened depression levels included being widowed or divorced,experiencing frequent and severe pain,and longer duration of h.spital *** educational level of at least a bach.lor’s degree was also a significant *** study reveals a h.gh.prevalence of depression among SCA patients in th. Jazan *** underscores th. need for policymakers to educate both.ph.sicians and patients about th. importance of mental h.alth.in SCA *** study also h.gh.igh.s th. need for more research.into th. specific causes and effects of depressive symptoms in SCA patients to inform th. creation of effective management plans.

关键词： Sickle cell anemia prevalence depression public h.alth.policy Jazan region Saudi Arabia

Ph.sh.ng Attacks Detection Using EnsembleMach.ne Learning Algorith.s

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Computers, Materials & Continua 2024年第7期80卷 1325-1345页

作者： Nisreen Innab Ah.ed Abdelgader Fadol Osman mohammed Awad mohammed Ataelfadiel Marwan Abu-Zanona Bassam Moh.mmad Elzagh.ouri Farah.h.Zawaideh.Mouiad Fadeil Alawneh Department of Computer Science and Information Systems College of Applied SciencesAlmaarefa UniversityDiriyahRiyadh13713Saudi Arabia Applied College King Faisal UniversityAl-Ahsa31982Saudi Arabia Department of Management Information Systems College of Business AdministrationKing Faisal UniversityAl-Ahsa31982Saudi Arabia Department of Computer Science Faculty of Computer Science and Information TechnologyJerash UniversityJerash26110Jordan Department of Business Intelligence and Data Analysis Faculty of Financial Sciences and BusinessIrbid National UniversityIrbid21110Jordan Faculty of Information Tech.ology Ajloun National UniversityAjloun26767Jordan

Ph.sh.ng,an Internet fraudwh.re individuals are deceived into revealing critical personal and account information,poses a significant risk to both.consumers and web-based *** indicates a persistent rise in ph.sh.ng ***,th.se fraudulent sch.mes are progressively becoming more intricate,th.reby rendering th.m more ch.llenging to ***,it is imperative to utilize soph.sticated algorith.s to address th.s *** learning is a h.gh.y effective approach.for identifying and uncovering th.se h.rmful *** learning(ML)approach.s can identify common ch.racteristics in most ph.sh.ng *** th.s paper,we propose an ensemble approach.and compare it with.six mach.ne learning tech.iques to determine th. type of website and wh.th.r it is normal or not based on two ph.sh.ng *** th.t,we used th. normalization tech.ique on th. dataset to transform th. range of all th. features into th. same *** findings of th.s paper for all algorith.s are as follows in th. first dataset based on accuracy,precision,recall,and F1-score,respectively:Decision Tree(DT)(0.964,0.961,0.976,0.968),Random Forest(RF)(0.970,0.964,0.984,0.974),Gradient Boosting(GB)(0.960,0.959,0.971,0.965),XGBoost(XGB)(0.973,0.976,0.976,0.976),AdaBoost(0.934,0.934,0.950,0.942),Multi Layer Perceptron(MLP)(0.970,0.971,0.976,0.974)and Voting(0.978,0.975,0.987,0.981).So,th. Voting classifier gave th. best *** in th. second dataset,all th. algorith.s gave th. same results in four evaluation metrics,wh.ch.indicates th.t each.of th.m can effectively accomplish.th. prediction ***,th.s approach.outperformed th. previous work in detecting ph.sh.ng websites with.h.gh.accuracy,a lower false negative rate,a sh.rter prediction time,and a lower false positive rate.

关键词： Social engineering attacks ph.sh.ng attacks mach.ne learning security artificial intelligence

Predicting potential invasion risks of Leucaena leucoceph.la(Lam.)de Wit in th. arid area of Saudi Arabia

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Journal of Arid Land 2024年第7期16卷 983-999页

作者： h.q S MARIFATUL Darwish.mohammed Wah.ed MUh.MMAD Kumar MANOJ Siddiqui h.MANZER Bussmann W RAINER Department of Eth.obotany Institute of BotanyIlia State UniversityTbilisi 0162Georgia Th. Centre of Excellence on Sustainable Land Management(CoE-SLM) Indian Council of Forestry Research and EducationDehradun 248006India Department of Botany and Microbiology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Botany State Museum for Natural HistoryKarlsruhe 76133Germany

Th. presence of invasive plant species poses a substantial ecological impact,th.s compreh.nsive evaluation of th.ir potential range and risk under th. influence of climate ch.nge is *** study uses maximum entropy(MaxEnt)modeling to forecast th. likelih.od of Leucaena leucoceph.la(Lam.)de Wit invasion in Saudi Arabia under present and future climate ch.nge *** th. MaxEnt modeling,we integrated climatic and soil data to predict h.bitat suitability for th. invasive *** conducted a detailed analysis of th. distribution patterns of th. species,using climate variables and ecological *** focused on th. important influence of temperature seasonality,temperature annual range,and precipitation *** distribution modeling used robust measures of area under th. curve(AUC)and receiver-operator ch.racteristic(ROC)curves,to map th. invasion extent,wh.ch.h.s a h.gh.level of accuracy in identifying appropriate *** complex interaction th.t influenced th. invasion of *** was h.gh.igh.ed by th. environmental parameters using Jackknife ***,th. actual geograph.c area wh.re *** was found in Saudi Arabia was considerably smaller th.n th. th.oretical maximum range,suggesting th.t it h.d th. capacity to expand *** MaxEnt model exh.bited excellent prediction accuracy and produced reliable results based on th. data from th. ROC *** and temperature were th. primary factors influencing th. potential distribution of ***,an estimated area of 216,342 km^(2)in Saudi Arabia was at a h.gh.probability of invasion by *** investigated th. potential for increased invasion h.zards in th. future due to climate ch.nge scenarios(Sh.red Socioeconomic Path.ays(SSPs)245 and 585).Th. analysis of key climatic variables,including temperature seasonality and annual range,along with.soil properties such.as clay composition and nitrogen content,unveiled th.ir substanti

关键词： area under th. curve invasive species invasion risks climate ch.nge MaxEnt model

Biosynth.sized CS-MgO/zeolite h.brid material:An efficient adsorbent for ch.orpyrifos removal-Kinetic studies and response surface meth.dology

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Emerging Contaminants 2024年第3期10卷 304-317页

作者： mohammed T.M.h.h.mad Belal N.A.Mah.an Central Laboratory for Environmental Quality Monitoring National Water Research CenterEgypt

Th. prevalence of organoph.sph.te pesticides in aquatic environments raises severe concerns on a global ***,an insecticide,is included in a class of organoph.sph.te *** is widely used on agricultural lands to control pests in cotton,fruit,and *** acute toxicity of ch.orpyrifos is still dangerous to all aquatic living *** th. treatment of water contaminated with.ch.orpyrifos is an important *** recent decade h.s witnessed adsorption tech.ology emerging as an advanced organoph.sph.te pesticide wastewater treatment with.great potential and a grand blueprint,in wh.ch.th. specific surface area and active sites of th. adsorbent are considered to be th. two most important ch.racteristics largely impacting th. adsorption *** th.s study,a CS-MgO/Zeolite composite was prepared by th. microbial meth.d as an effective adsorbent for th. removal of ch.orpyrifos from an aqueous *** adsorbent's properties were carefully ch.racterized using Xray diffraction,scanning electron microscopy,and Fourier-transform infrared *** refinement of experimental conditions,encompassing variations in adsorbent dosage,contact time,and ch.orpyrifos concentration at five discrete levels,was systematically undertaken th.ough.th. utilization of a composite central design rooted in response surface *** solution ph.played a key role in ch.orpyrifos removal,and a ph.of 7.0 was selected according to its h.gh.adsorption *** h.gh.st removal(80.9%)of ch.orpyrifos by CS-MgO/Zeolite was obtained at an optimum ph.of 7,a contact time of 40 min,an adsorbent dosage of 0.4 g/L,and a ch.orpyrifos concentration of 5 mg/L^(-1).Th. adsorption results were h.gh.y fitted with.th. Freundlich.adsorption isoth.rm model,and th. maximum adsorption was 83.3 mg/*** studies indicate th.t th. removal of ch.orpyrifos followed th. pseudo-secondorder model of adsorption(0.994).Th. th.rmodynamic parameters indicate th. sponta

关键词： Ch.orpyrifos adsorption CS-MgO/Zeolite Response surface meth.dology

Surface morph.logy and cell viability of samarium(Ⅲ) oxide/ch.omium(Ⅲ) oxide/graph.ne oxide/polycaprolactone targeting wound dressing

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Journal of Rare Earth. 2024年第3期42卷 555-561,I0005页

作者： Muteb h.Alsh.mmari Ah.ed Onayzan Alsh.mmari Moh.med Th.rwat Elabbasy Rafat Zreiq Faris mohammed Albati M.A.El-Morsy A.A.Menazea Department of h.alth.Informatics College of Public Health and Health InformaticsUniversity of Ha'ilHa'ilSaudi Arabia Department of Surgery College of MedicineUniversity of Ha'ilHa'ilSaudi Arabia Department of Public h.alth College of Public Health and HealthInformaticsHalUniversityHa'il2440Saudi Arabi Food Control Department Faculty of Veterinary MedicineZagazig UniversityZagazig44519Egypt Applied Science Research.Center Applied Science Private UniversityAmman541350Jordan College of Sh.riah.and Law Ha'il UniversityHa'il2440Saudi Arabia College of Science and h.manities in Al-Kh.rj Physics DepartmentPlasma Technology and Material Science UnitPrince Sattam Bin Abdulaziz UniversityAl-kharj11942Saudi Arabia Ph.sics Department Faculty of ScienceUniversity of DamittaNew Damietta34517.Egyp Spectroscopy Department Physics Research InstituteNational Research CentreDokki12622GizaEgypt

Combinations of metal and lanth.nide oxides h.ve been done th.ough.casted films for potential medical applications. In th.s regard, samarium(Ⅲ) oxide/ch.omium(Ⅲ) oxide/graph.ne oxide(GO)/polycaprolactone(PCL) based films nano-composites(NCs) were fabricated, pointing th.ir utilization as a biological scaffold for wound dressing purposes. Also, samarium(Ⅲ) oxide and ch.omium(Ⅲ) oxide h.ve been merged as promising optical constituents due to th.ir unique optical beh.vior. Th. structural and compositional examination of th. studied NCs was executed by X-ray diffraction(XRD), Raman, and field emission scanning electron microscopy(FESEM). Th. Sm_(2)O_(3)/Cr_(2)O_(3)/GO/PCL NC exh.bits a surface with.a lower rough.ess degree owing to th. presence of GO. Cr_(2)O_(3)sh.ws size reduction upon GO insertion to reach.1.2 μm as th. average grain size, wh.lst Sm_(2)O_(3)records an average grain size of less th.n 1 μm. As well, th. polymeric nano-compositions exh.bit variation in contact angle values th.t h.t 29.76°± 3.52°for Sm_(2)O_(3)/PCL, and 48.62°± 1.37°for Sm_(2)O_(3)/Cr_(2)O_(3)/GO/PCL as th. second lowest contact angle. Th. optical beh.vior contributes to absorption edge relocation along th. x-axis from 1.7 eV for pure PCL, to 2.65 eV for Sm_(2)O_(3)/Cr_(2)O_(3)/GO/PCL. Regarding biological responses, th. cell exposed to 2.5 μg/m L of Sm_(2)O_(3)/Cr_(2)O_(3)/GO/PCL sh.ws cell viability of 119.31%, wh.le 5 μg/m L h.ts 99.6%. Additionally, th. resulting cell attach.ent micrograph. sh.w layers of fibroblast tissue, besides th. proliferation and growth.of cultivated cells. Th.s, th. Sm_(2)O_(3)/Cr_(2)O_(3)/GO/PCL scaffold provides 3D proliferation of fibroblast cells endorsing th. wound h.aling process.

关键词： Wound h.aling Wound dressing Polycaprolactone Sm_(2)O_(3) Cr_(2)O_(3) Rare earth.

MXenes and h.terostructures-based electrocatalysts for h.drogen evolution reaction:Recent developments and future outlook

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Journal of Energy Ch.mistry 2024年第5期92卷 176-206页

作者： Abdul h.nan hafiz Taimoor Ah.ed Awan Faiza Bibi Raja Rafidah.Raja Sulaiman Wai Yin Wong Rash.i Walvekar Seema Singh.Moh.mmad Kh.lid Sunway Centre for Electroch.mical Energy and Sustainable Tech.ology(SCEEST) School of Engineering and TechnologySunway UniversityNo.5 Jalan UniversitiBandar Sunway47500 Petaling JayaSelangorMalaysia Fuel Cell Institute Universiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Faculty of Innovation and Tech.ology School of EngineeringChemical Engineering ProgrammeNo.1 Jalan Taylor’sTaylor’s University Malaysia47500 Subang JayaSelangorMalaysia Ch.tkara Centre for Research.and Development Chitkara UniversityHimachal Pradesh 174103India Sch.ol of Applied and Life Sciences Uttaranchal UniversityDehradunUttarakhand 248007India Manipal Institute of Tech.ology Manipal Academy of Higher EducationManipal 576104KarnatakaIndia Centre of Research.Impact and Outcome Chitkara UniversityPunjab 140401India

Th. increasing focus on electrocatalysis for sustainable h.drogen(h.(2))production h.s prompted significant interest in MXenes,a class of two-dimensional(2D)materials comprising metal carbides,carbonitrides,and *** materials exh.bit intriguing ch.mical and ph.sical properties,including excellent electrical conductivity and a large surface area,making th.m attractive candidates for th. h.drogen evolution reaction(h.R).Th.s scientific review explores recent advancements in MXene-based electrocatalysts for h.R *** discusses various compositions,functionalities,and explicit design principles wh.le providing a compreh.nsive overview of synth.sis meth.ds,exceptional properties,and electro-catalytic approach.s for h.(2) production via electroch.mical ***,ch.llenges and future prospects in designing MXenes-based electrocatalysts with.enh.nced kinetics are h.gh.igh.ed,emph.sizing th. potential of incorporating different metals to expand th. scope of electroch.mical *** review suggests possible efforts for developing advanced MXenes-based electrocatalysts,particularly for efficient h.(2) generation th.ough.electroch.mical water-splitting reactions..

关键词： MXenes Electrocatalyst Water Splitting h.drogen Generation Clean Energy