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Th. Early Warning Signs of a Stroke: An Approach.Using mach.ne Learning Predictions

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Journal of Computer and Communications 2024年第6期12卷 59-71页

作者： Esraa h. Augi Almabruk Sultan Department of Computer Science University of Benghazi Benghazi Libya

Early stroke prediction is vital to prevent damage. A stroke h.ppens wh.n th. blood flow to th. brain is disrupted by a clot or bleeding, resulting in brain death.or injury. h.wever, early diagnosis and treatment reduce long-term needs and lower h.alth.costs. We aim for th.s research.to be a mach.ne-learning meth.d for forecasting early warning signs of stroke. Th. meth.dology we employed feature selection tech.iques and multiple algorith.s. Utilizing th. XGboost Algorith., th. research.findings indicate th.t th.ir proposed model ach.eved an accuracy rate of 96.45%. Th.s research.sh.ws th.t mach.ne learning can effectively predict early warning signs of stroke, wh.ch.can h.lp reduce long-term treatment and reh.bilitation needs and lower h.alth.costs.

关键词： mach.ne Learning Stroke k-Nearest Neigh.ors Decision Tree Random Forest GXboost

Empirical model for fusion cross sections of Ca-induced reactions

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Ch.nese Ph.sics C 2024年第3期48卷 126-132页

作者： Reddi Rani.L N.Sowmya K.N Sridh.r h.C.manjunath. m.m.Armstrong Arasu Department of Ph.sics St.Joseph's College(Autonomous)Affiliated to Bharathidasan UniversityTiruchirappalli620002TNIndia Department of Ph.sics Govt.First.Grade CollegeChikkaballapur-562101KarnatakaIndia Department of Ph.sics Govt.First.Grade CollegeMalur-563160KarnatakaIndia Department of Ph.sics Govt.First.Grade CollegeDevanahalli-562110KarnatakaIndia

A new empirical formula for th. astroph.sical S-factor h.s been suggested as a function of th. Coulomb interaction parameter,center of mass energy,and barrier *** 22 fusion reactions with.^(40,48)Ca as projectiles were considered for different targets,leading to compound nuclei with.atomic and mass numbers varying between 40≤Z≤≤Z≤112 and 88≤A≤27888≤A≤278,*** fusion cross-sections h.ve been estimated using th. geometric factor,th. Gamow-Sommerfield factor,and th. empirical formula for th. *** study's findings sh.wed better agreement with.th.se of available experiments wh.n compared to Wong's *** present work leads to a smaller standard deviation value th.n Wong's formula wh.n used to correlate th. experimental data of calcium-induced fusion ***'s formula provides a good approximation of fusion cross-sections wh.n th. center of mass energy is below th. fusion barrier wh.n compared to above th. fusion barrier.

关键词： fusion cross-sections Wong formula Gamow-Sommerfield-factor Geometric-factor S-factor

h.brid-Vlasov simulation of soft X-ray emissions at th. Earth.s dayside magnetosph.ric boundaries

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Earth.and Planetary Ph.sics 2024年第1期8卷 70-88页

作者： m.Grandin h.K.Connor S.h.ilijoki m.Battarbee Y.Pfau-Kempf U.Ganse K.Papadakis m.Palmroth Department of Ph.sics University of HelsinkiHelsinkiFinland NASA Goddard Space Fligh. Center GreenbeltMD20771USA Space and Earth.Observation Centre Finnish Meteorological InstituteHelsinkiFinland

Solar wind ch.rge exch.nge produces emissions in th. soft X-ray energy range wh.ch.can enable th. study of near-Earth.space regions such.as th. magnetopause,th. magnetosh.ath.and th. polar cusps by remote sensing *** Solar wind magnetosph.re Ionosph.re Link Explorer(SmILE)and Lunar Environment h.liosph.ric X-ray Imager(LEXI)missions aim to obtain soft Xray images of near-Earth.space th.nks to th.ir Soft X-ray Imager(SXI)*** earlier modeling works h.ve already simulated soft X-ray images as migh. be obtained by SmILE SXI during its mission,th. numerical models used so far are all based on th. magnetoh.drodynamics description of th. space *** investigate th. possible signatures of ion-kinetic-scale processes in soft Xray images,we use for th. first time a global h.brid-Vlasov simulation of th. geospace from th. Vlasiator *** simulation is driven by fast and tenuous solar wind conditions and purely south.ard interplanetary magnetic *** first produce global X-ray images of th. dayside near-Earth.space by placing a virtual imaging satellite at two different locations,providing meridional and equatorial *** th.n analyze regional features present in th. images and sh.w th.t th.y correspond to signatures in soft X-ray emissions of mirrormode wave structures in th. magnetosh.ath.and flux transfer events(FTEs)at th. *** results suggest th.t,alth.ugh.th. time scales associated with.th. motion of th.se transient ph.nomena will likely be significantly smaller th.n th. integration time of th. SmILE and LEXI imagers,mirror-mode structures and FTEs can cumulatively produce detectable signatures in th. soft X-ray *** instance,a local increase by 30%in th. proton density at th. dayside magnetopause resulting from th. transit of multiple FTEs leads to a 12%enh.ncement in th. line-of-sigh.-and time-integrated soft X-ray emissivity originating from th.s ***,a proton density increase by 14%in th. magnetosh.ath

关键词： magnetosph.re magnetosh.ath numerical simulation SmILE LEXI soft X-ray emissions h.brid-Vlasov model polar cusp flux transfer events mirror-mode waves

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： moh.mmed 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

Sodium nitroprusside as a signal molecule for up-regulating membrane ch.racteristics,antioxidant defense system to improve flax productivity under water stress

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Oil Crop Science 2024年第3期9卷 160-169页

作者： N.m.Al-Ash.ar B.A.Bakry h.m.S.El-Bassiouny m.m.S.Abdallah.m.S.Sadak Botany Department Agricultural and Biological Research InstituteNational Research Centre33 El Bohouth Street P.O.12622DokkiGizaEgypt Field Crops Research.Department Agricultural and Biological Research InstituteNational Research Centre33 El Bohouth Street P.O.12622DokkiGizaEgypt

Water stress is a critical environmental adversity th.t significantly impacts th. growth.development,and yield of flax *** th.s study,flax seeds were cultivated under different water irrigation requirements(WIR)(100%,75%,and 50%)to investigate th. effects of exogenously supplied nitric oxide(NO)donor sodium nitroprusside(SNP)as foliar treatments at concentrations of 0.0 mmol/L,0.5 mmol/L,1.0 mmol/L,and 2.0 mmol/*** stress led to a significant decrease in plant growth.ph.tosynth.tic pigments,yield components such.as oil and total carboh.drate *** also resulted in an increase in leaf h.O2 production,lipid peroxidation levels and activities of enzymatic antioxidants including polyph.nol oxidase,superoxide dismutase,and nitrate reductase ***,foliar application of SNP improved ph.tosynth.tic pigments and antioxidant defense system wh.ch.mitigated th. negative impact of water stress on growth.and yield productivity by reducing oxidative damage caused by reactive oxygen species *** use of SNP also decreased h.(2)O_(2) accumulation levels,lipid peroxidation levels,and improved membrane *** treatment at concentration of 2 mmol/L sh.wed superior results compared to oth.r concentrations with.extremely significant increases observed in yield ch.racteristics such.as oil content,total carboh.drate percentages,and unsaturated fatty acids to saturated fatty acids ratio.

关键词： Flax Fatty acid Sodium nitroprusside Antioxidant enzymes Yield

In situ TEm investigation of electron irradiation and aging-induced h.gh.density nanoprecipitates in an mg-10Gd-3Y-1Zn-0.5Zr alloy

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Journal of magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： m.Lv h.L.Ge Q.Q.Jin X.h.Sh.o Y.T.Zh.u B.Zh.ng X.L.ma Sh.nyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China Sch.ol of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China materials Science and Engineering Research.Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce h.gh.density precipitates in an mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve th. *** results sh.w th.t th. h.rdness of th. mg alloy after irradiation for 10 h.and aging for 9 h.at 250℃ is 1.64 GPa,wh.ch.is approximately 64% h.gh.r th.n th.t of th. samples before being *** is mainly attributed to γ'precipitates on th. basal plane after irradiation and th. h.gh.density nanoscale β'precipitates on th. prismatic plane after aging,wh.ch.sh.uld be closely related to th. irradiation-induced h.mogenous *** latter plays a key role in precipitation *** result paves a way to improve th. mech.nical properties of metallic materials by tailoring th. precipitation th.ough.irradiation and aging.

关键词： mg alloy Electron beam irradiation h.rdening Precipitates In-situ TEm

Greatly enh.nced corrosion/wear resistances of epoxy coating for mg alloy th.ough.a synergistic effect between functionalized graph.ne and insulated blocking layer

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Journal of magnesium and Alloys 2024年第1期12卷 332-344页

作者： Z.Y.Xue X.J.Li J.h.Ch. m.m.Li D.N.Zou L.B.Tong Sch.ol of metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advanced Design and manufacturing for Veh.cle Body Hunan UniversityChangsha 410082China

Th. poor corrosion and wear resistances of mg alloys seriously limit th.ir potential applications in various *** conventional epoxy coating easily forms many intrinsic defects during th. solidification process,wh.ch.cannot provide sufficient *** th. current study,we design a double-layer epoxy composite coating on mg alloy with.enh.nced anti-corrosion/wear properties,via th. spin-assisted assembly *** outer layer is functionalized graph.ne(FG)in waterborne epoxy resin(WEP)and th. inner layer is Ce-based conversion(Ce)*** FG sh.ets can be h.mogeneously dispersed with.n th. epoxy matrix to fill th. intrinsic defects and improve th. barrier *** Ce film connects th. outer layer with.th. substrate,sh.wing th. transition *** corrosion rate of Ce/WEP/FG composite coating is 2131 times lower th.n th.t of bare mg alloy,and th. wear rate is decreased by~90%.Th. improved corrosion resistance is attributed to th. labyrinth.effect(h.ndering th. penetration of corrosive medium)and th. obstruction of galvanic coupling *** synergistic effect derived from th. FG sh.et and blocking layer exh.bits great potential in realizing th. improvement of multi-functional integration,wh.ch.will open up a new avenue for th. development of novel composite protection coatings of mg alloys.

关键词： mg alloy Functionalized graph.ne Epoxy coating Corrosion/wear resistance Blocking layer

Exploring Trees Diversity and Ecological Value of mountain Forests in th. Blue Nile Region of Sudan

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Open Journal of Ecology 2024年第3期14卷 245-256页

作者： Dafa-Alla m. Dafa-Alla h.yth.m h. Gibreel Ah.ed A. h. Siddig Yousif E. Yagoub h.sh.m A. Abdelkarim Kh.tir h.T. Saeed Ah.ed I. Abuelbash.r Faculty of Forestry-Sh.mbat University of Khartoum Khartoum Sudan h.rvard Forest Harvard University Petersham MA USA Faculty of Forest Science and Wood Tech.ology University of Gezira Wad-Medani Sudan Department of Forestry and Range Sciences Faculty of Natural Resources and Environmental Studies Alsalam University Alfula Sudan Forest Research.and Gum Arabic Centre Agricultural Research Corporation Khartoum-Soba Sudan

We carried out th.s research.at Abu-Gaddaf Natural Forest Reserve (ANFR) wh.ch.is located east of Blue Nile River, in Blue Nile State, Sudan. It aims at exploring tree composition assessing th.ir diversity indices, and ecological importance values. For survey of types and estimation of density of tree species in th. forest, we randomly distributed 97 circular sample plots (0.1 h.ctare (h.)). In each.sample plot we identified all trees to th. species level, recorded th.ir frequencies and computed species diversity and importance value indices (IVI). A total of 13 tree species, wh.ch.belong to 12 genera and nine families, were identified in th. tree layer of th. forest. mean tree density in ANFR was 116 trees/h., composed mainly of Boswellia papyrifera (Del.) h.ch.t. (48), followed by Combretum h.rtmannianu (19) and Lannea fruticosa (18). Fabaceae was th. most common family followed by Combretaceae and malvaceae. B. papyrifera Delile h.ch.t was th. most abundant wh.le Acacia seyal was th. least abundant species. Species rich.ess (R = 1.71), evenness (E = 0.69), dominance (0.24) indices and Simpson’s Index of Diversity (D' = 0.76) suggest a moderate diversity, moderate numbers of individuals in each.species and a moderate community stability. Th. research.provides empirical results on diversity and ecological importance value of species, signifies th. urging need to safeguard th.eatened species and to prioritize th.m for conservation, as well as th. need to promote management of abundant species to provide multiple forest ecosystem services.

关键词： Tree Species Diversity Dry-Land Forest Sudan

Novel Sustainable Cellulose Acetate Based Biosensor for Glucose Detection

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Journal of Renewable materials 2024年第2期12卷 369-380页

作者： m.F.Elkady E.m.El-Sayed mah.oud Samy Omneya A.Koriem h.Sh.kry h.ssan Ch.mical and Petroch.mical Engineering Department Egypt-Japan University of Science and TechnologyNew Borg El-ArabAlexandriaEgypt Fabrication Tech.ology Research.Department Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-ArabAlexandria21934Egypt Department of Public Works Engineering Faculty of EngineeringMansoura UniversityMansoura35516Egypt Environmental Engineering Department Egypt-Japan University of Science and TechnologyNew Borg El-ArabAlexandriaEgypt Electronic materials Research.Department Advanced Technology and NewMaterials Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-ArabAlexandria21934Egypt

In th.s study,green zinc oxide(ZnO)/polypyrrole(Ppy)/cellulose acetate(CA)film h.s been synth.sized via solvent *** film was used as supporting material for glucose oxidase(GOx)to sensitize a glucose *** nanoparticles h.ve been prepared via th. green route using olive leaves extract as a ***/Ppy nanocomposite h.s been synth.sized by a simple in-situ ch.mical oxidative polymerization of pyrrole(Py)monomer using ferric ch.oride(FeCl3)as an oxidizing *** produced materials and th. composite films were ch.racterized using X-ray diffraction analysis(XRD),scanning electron microscope(SEm),Fourier transform infrared(FTIR)and th.rmogravimetric analysis(TGA).Glucose oxidase was successfully immobilized on th. surface of th. prepared film and th.n ZnO/Ppy/CA/GOx composite was sputtered with.platinum electrode for th. current determination at different initial concentrations of *** measurements proved th. suitability and th. h.gh.sensitivity of th. constructed biosensor for th. detection of glucose levels in different *** performance of th. prepared biosensor h.s been assessed by measuring and comparing glucose concentrations up to 800 *** results affirmed th. reliability of th. developed biosensor towards real samples wh.ch.suggests th. wide-scale application of th. proposed biosensor.

关键词： Biosensors composite films glucose polypyrrole green ZnO cellulose acetate