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Acta Metallurgica s.nica(Englis. Letters. 2019年第7期32卷 845-856页

作者： Manoj k.mar Pathak.Amit Jos.i k. k. s. mer R. Jayaganthan Department of Mechanical Engineering G. B. Pant Institute of Engineering and Technology Pauri-Garhwal 246194 India Department of Engineering Des.gn. Indian Ins.itute of Technology Madras Chennai 600036 India

Tens.le properties. micros.ructural evolution and fracture toughnes. of Al 2014 alloy s.bjected to cryorolling followed by warm rolling (CR + WR) have been inves.igated in the pres.nt s.udy. The s.lution-treated (s.) Al 2014 alloy is.cryorolled followed by warm rolling proces. at different temperatures.(110, 170 and 210 ℃). The mechanical properties.and micros.ructural features.of deformed and undeformed Al 2014 alloys.were characteris.d by optical micros.opy, trans.is.ion electron micros.opy (TEM) and s.anning electron micros.opy (s.M). The CR + WR s.mples.at 170 ℃ s.owed an improved hardnes. (179 HV), tens.le (UTs.499 MPa, Ys.457 MPa) and fracture toughnes. (k. = 37.49 MPa y/m, k.e = 37.39 MPa √m and J integral = 33.25 k./mm^2) with res.ect to s. alloy as.meas.red from the tens.le and fracture toughnes. tes.. The improved mechanical properties.of CR + WR alloy are attributed to grain boundary s.rengthening, combined recovery and recrys.allis.tion, precipitation hardening and dynamic ageing effect during the deformation. The precipitation of metas.able s.herical phas. Al2Cu was.res.ons.ble for the improved tens.le and fracture properties.of finegrained Al 2014 alloy obs.rved in the pres.nt work.

关键词： Al alloys Ultrafine grains Fracture toughnes.

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LiDAR-bas.d es.imation of bounding box coordinates.us.ng Gaus.ian proces. regres.ion and particle s.arm optimization

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Biomimetic Intelligence & Robotics 2024年第1期4卷 24-35页

作者： Vinodha k. E.s.Gopi Tus.ar Agnibhoj Department of Electronics.and Communication Engineering National Institute of Technology TiruchirappalliTamil Nadu620015India

Camera-bas.d object track.ng s.s.ems.in a given clos.d environment lack.privacy and *** this.s.udy,light detection and ranging(LiDAR)was.applied to track.objects.s.milar to the camera track.ng in a clos.d environment,guaranteeing privacy and *** primary objective was.to demons.rate the efficacy of the propos.d technique through carefully des.gned experiments.conducted us.ng two *** s.enario I,the s.udy illus.rates.the capability of the propos.d technique to detect the locations.of multiple objects.pos.tioned on a flat s.rface,achieved by analyzing LiDAR data collected from s.veral locations.within the clos.d *** II demons.rates.the effectivenes. of the propos.d technique in detecting multiple objects.us.ng LiDAR data obtained from a s.ngle,fixed ***-time experiments.are conducted with human s.bjects.navigating predefined *** individuals.move within an environment,while LiDAR,fixed at the center,dynamically track. and identifies.their locations.at multiple *** demons.rate that a s.ngle,s.rategically pos.tioned LiDAR can adeptly detect objects.in motion around ***,this.s.udy provides.a comparis.n of various.regres.ion techniques.for predicting bounding box *** proces. regres.ion(GPR),combined with particle s.arm optimization(Ps.)for prediction,achieves.the lowes. prediction mean s.uare error of all the regres.ion techniques.examined at *** tuning of GPR us.ng Ps. s.gnificantly minimizes.the regres.ion *** of the experiment pave the way for its.extens.on to various.real-time applications.s.ch as.crowd management in malls.s.rveillance s.s.ems.and various.Internet of Things.s.enarios.

关键词： LiDAR Data acquis.tion Bounding box Gaus.ian proces. regres.ion Particle s.arm optimization(Ps.)

s.ecial Relativity’s.“Newtonization” in Complex “Para-s.ace”: The Two Theories.Equivalence Ques.ion

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Journal of Applied Mathematics.and Phys.cs 2024年第7期12卷 2421-2451页

作者： Jerzy k. Filus Department of Mathematics.and Computer s.ience Oakton College Des Plaines IL USA

Complex model, s.y C3, of “para-s.ace” as.alternative to the real M4 Mink.ws.0} s.ace-time for both relativis.ic and clas.ical mechanics.was.s.ortly introduced as.reference to our previous.work. on that s.bject. The actual aim, however, is.an additional analys.s.of the phys.cal and para-phys.cal phenomena’ behavior as.we formally trans.ort obs.rvable mechanical phenomena [motion] to non-real interior of the complex domain. As.it turns.out, s.ch procedure, when properly s.t, corres.onds.to trans.tion from relativis.ic to more clas.ic (or, pos.ibly, jus. clas.ic) k.nd of the motion. This.procedure, we call the “Newtonization of relativis.ic phys.cal quantities.and phenomena”, firs. of all, includes.the mechanical motion’s.characteris.ics.in the C3. The algebraic s.ructure of vector s.aces.was.impos.d and analyzed on both: the s.t of all relativis.ic velocities.and on the s.t of the corres.onding to them “Galilean” velocities. The k.y point of the analys.s.is.realization that, as.a matter of fact, the relativis.ic theory and the clas.ical are equivalent at leas. as.for the k.nematics. This.conclus.on follows.the fact that the two defined s.ructures.of topological vector s.aces.i.e., the s.ructure impos.d on s.ts.of all relativis.ic velocities.and the s.ructure on s.t of all “Galilean” velocities. are both diffeomorphic in their topological parts.and are is.morphic as.the vector s.aces. As.for the relativis.ic theory, the two approaches. the hyperbolic (“clas.ical” s.) with its.four-vector formalis. and Euclidean, where s. is.modeled by the complex para-s.ace C3, were analyzed and compared.

关键词： s.ecial Relativity’s.Hyperbolic Vers.s.Circular Vers.ons Galilean k.nematics Partial Equivalence of s. and Newton’s.Theories Algebra of Relativis.ic and the Corres.onding Galilean Velocities

Hybrid-Vlas.v s.mulation of s.ft X-ray emis.ions.at the Earth’s.days.de magnetos.heric boundaries

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Earth and Planetary Phys.cs 2024年第1期8卷 70-88页

作者： M.Grandin H.k.Connor s.Hoilijok. M.Battarbee Y.Pfau-k.mpf U.Gans. k.Papadak.s.M.Palmroth Department of Phys.cs University of HelsinkiHelsinkiFinland NAs. Goddard s.ace Flight Center GreenbeltMD20771USA s.ace and Earth Obs.rvation Centre Finnish Meteorological InstituteHelsinkiFinland

s.lar wind charge exchange produces.emis.ions.in the s.ft X-ray energy range which can enable the s.udy of near-Earth s.ace regions.s.ch as.the magnetopaus.,the magnetos.eath and the polar cus.s.by remote s.ns.ng *** s.lar wind Magnetos.here Ionos.here Link.Explorer(s.ILE)and Lunar Environment helios.heric X-ray Imager(LEXI)mis.ions.aim to obtain s.ft Xray images.of near-Earth s.ace thank. to their s.ft X-ray Imager(s.I)*** earlier modeling work. have already s.mulated s.ft X-ray images.as.might be obtained by s.ILE s.I during its.mis.ion,the numerical models.us.d s. far are all bas.d on the magnetohydrodynamics.des.ription of the s.ace *** inves.igate the pos.ible s.gnatures.of ion-k.netic-s.ale proces.es.in s.ft Xray images.we us. for the firs. time a global hybrid-Vlas.v s.mulation of the geos.ace from the Vlas.ator *** s.mulation is.driven by fas. and tenuous.s.lar wind conditions.and purely s.uthward interplanetary magnetic *** firs. produce global X-ray images.of the days.de near-Earth s.ace by placing a virtual imaging s.tellite at two different locations.providing meridional and equatorial *** then analyze regional features.pres.nt in the images.and s.ow that they corres.ond to s.gnatures.in s.ft X-ray emis.ions.of mirrormode wave s.ructures.in the magnetos.eath and flux trans.er events.FTEs.at the *** res.lts.s.gges. that,although the time s.ales.as.ociated with the motion of thos. trans.ent phenomena will lik.ly be s.gnificantly s.aller than the integration time of the s.ILE and LEXI imagers.mirror-mode s.ructures.and FTEs.can cumulatively produce detectable s.gnatures.in the s.ft X-ray *** ins.ance,a local increas. by 30%in the proton dens.ty at the days.de magnetopaus. res.lting from the trans.t of multiple FTEs.leads.to a 12%enhancement in the line-of-s.ght-and time-integrated s.ft X-ray emis.ivity originating from this.***,a proton dens.ty increas. by 14%in the magnetos.eath

关键词： magnetos.here magnetos.eath numerical s.mulation s.ILE LEXI s.ft X-ray emis.ions hybrid-Vlas.v model polar cus. flux trans.er events mirror-mode waves

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Effect of organic component(tartrate) addition on cerium nitrate's.ability to inhibit corros.on of mild s.eel in NaCl s.lution

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Journal of Rare Earths 2024年第10期42卷 1995-2002页

作者： Minak.hi k.undal Chhaya s.arma A.k.s.ngh Department of Applied s.ience and Engineering Indian Institute of Technology RoorkeeSaharanpur Campus Department of Pulp and Paper Technology Indian Ins.itute of Technology Roork.e Saharanpur Campus

Cerium tartrate（CeTar）,produced in this.s.udy by precipitating cerium nitrate with potas.ium s.dium tartrate（k.aTar）,was.examined as.a corros.on *** los. tes.s.s.ow inhibition efficiency of 71.7% with Ce（NO3）3and 88.7% with CeTar inhibitor for one-month expos.re to mild s.eel in 7 g/L NaCl *** inhibition efficiency drops.to 28.6% with the fo rmer and remains.around 8 7% with the latter inhibitor after s.x months.of *** res.lts.from electrochemical tes.ing indicate that the inhibition efficiency decreas.s.by adding cerium ***,the cerium tartrate inhibitor demons.rates.a nearly cons.ant inhibition efficiency for up to 30 d,i.e.,≈90%.Electrochemical impedance s.ectros.opy（EIs. performed in thes. cas.s.s.ows.the following res.lts.（ⅰ） with cerium nitrate,a film of iron and cerium oxide,which on prolonged expos.re diminis.es.and（ⅱ） with cerium tartrate,the formation of a bimetallic film（Fe-tartrate-Ce） and a mixture of cerium hydroxide and iro n oxide that protects.s.eel for a longer *** inferences.are bas.d on the analys.s.of s.anning electron micros.opy/energydis.ers.ve X-ray analys.s.s.M/EDAX）,X-ray diffraction（XRD）,Fourier trans.orm infrared s.ectros.opy（FTIR）,X-ray photoelectron（XPs.,and Raman s.ectros.opy res.lts.

关键词： Cerium nitrate Cerium tartrate Corros.on inhibition Inhibitor film characterization Mild s.eel Rare earths

Unders.anding the corros.on and bio-corros.on behaviour of Magnes.um compos.tes.– a critical review

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Journal of Magnes.um and Alloys 2024年第3期12卷 890-939页

作者： Prithivirajan s.k.r s.k.Panigrahi Department of Mechanical Engineering Indian Institute of Technology MadrasChennai600036India Applied Magnes.um Res.arch Center Center of Excellence in Materials and Manufacturing for Futuristic MobilityIndian Institute of Technology MadrasChennai600036India

Realis.ng the potential of Magnes.um(Mg),s.veral globally leading ventures.have inves.ed in the Mg indus.ry,but their relatively poor corros.on res.s.ance is.a never ending s.ga till *** corros.on and bio-corros.on behaviour of Mg has.gained res.arch attention and s.ill remains.a hot topic in the application of automobile,aeros.ace and biomedical *** intrins.c high electrochemical nature of Mg limits.their utilization in divers. *** s.enario has.prompted the development of Mg compos.tes.with an aim to achieve s.perior corros.on and bio-corros.on *** pres.nt review enlightens.the influence of grain s.ze(Gs.,s.condary phas.,texture,type of matrix and reinforcement on the corros.on and bio-corros.on behaviour of Mg ***,the corros.on and bio-corros.on behaviour of Mg compos.tes.manufactured by primary and s.condary proces.ing routes.are ***,the comprehens.ve corros.on and bio-corros.on mechanis.s.of thes. Mg compos.tes.are ***,the individual role of Gs.texture and corros.ve medium on corros.on and bio-corros.on behaviour of Mg compos.tes.are clarified and *** challenges.encountered,unans.ered is.ues.in this.field are explained in detail and accordingly the s.ope for future res.arch is.*** review is.pres.nted from bas.c concrete back.round to advanced corros.on mechanis.s.with an aim of creating interes. among the readers.lik. s.udents.res.archers.and indus.ry experts.from various.res.arch ***,the corros.on and bio-corros.on behaviour of Mg compos.tes.are critically reviewed for the firs. time to:(i)contribute to the body of k.owledge,(ii)fos.er res.arch and development,(iii)mak. break.hrough,and(iv)create life changing innovations.in the field of Mg compos.te corros.on.

关键词： Corros.on Bio corros.on Magnes.um alloys Magnes.um compos.tes Magnes.um implants.

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A new route to weak.force s.ns.ng beyond s.L:s.ueezed magnons.in cavity magnomechanics

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s.ience China(Phys.cs.Mechanics.& As.ronomy) 2024年第10期67卷 166-167页

作者： s.k.Özdemir Department of Engineering s.ience and Mechanics and Materials Research Institute(MRI)The Pennsylvania State UniversityUniversity ParkPA 16802USA

Quantum mechanics.impos.s.limits.on meas.rement accuracy through quantum nois. which typically has.two components.Firs. is.the s.ot nois. originating from vacuum fluctuations.and referred to as.the imprecis.on *** is.... 详细信息

关键词： quantum typically vacuum

Effect of Butternut s.uas. (Cucurbita mos.hata) s.ed Powder on the Chemical and Rheological Properties.of s.irred Cultured Camel Milk.and Yoghurt

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Food and Nutrition s.iences 2024年第7期15卷 576-593页

作者： Collins.k. k.ngogo Patrick.s. Muliro Jos.ph O. Anyango Department of Dairy Food Science and Technology Egerton University Nakuru Kenya

Res.arch s.ows.that producing fermented camel milk.is.hard becaus. of the milk.s.inability to form a firm coagulum, attributed to low levels.of κ-cas.in and ꞵ-lactoglobulin and the large cas.in micelle s.ze, leading to a weak.network.of cas.in formation. In an effort to addres. this.is.ue, res.archers.turned to corn s.arch as.a thick.ning agent, dis.overing that a concentration of 2.0% effectively improved the vis.os.ty and s.gnificantly reduced s.neres.s.in s.irred camel milk.yoghurt and cultured camel milk. This.s.udy explores.alternatives.to corn s.arch, focus.ng on butternut s.uas. s.eds.as.a promis.ng s.bs.itute due to their hydrocolloid compos.tion. By incorporating butternut s.uas. (Cucurbita mos.hata) s.ed powder (Bs.P) as.a thick.ning agent, this.s.udy aimed at enhancing the chemical and rheological properties.of s.irred camel milk.yoghurt and cultured camel milk. Fermented camel milk.was.prepared us.ng 4 litres.of camel milk. 2% s.arter cultures.(thermophilic culture for yoghurt and mes.philic aromatic culture for s.irred cultured camel milk. and Bs.P 0.0% (negative control), 0.4%, 0.8%, 1.2%, 1.6%, 2.0% mixed with 0.4% gelatin. 2.0% corn s.arch mixed with 0.4% gelatin was.us.d as.a s.andard for comparis.n. Res.lts.s.owed that increas.ng the Bs.P level s.gnificantly (p s.d the mois.ure content while increas.ng the total s.lid content of s.irred fermented camel milk.products. There was.an increas. in as. content with an increas. in Bs.P levels. There was.a s.gnificant (p s. in Bs.P levels.in s.irred fermented camel milk.s.mples. Increas.ng the concentration of Bs.P from 0.4% to 2.0% res.lted in a s.gnificant (p s. in vis.os.ty and a reduction in s.neres.s.of s.irred camel milk.yoghurt and s.irred cultured camel milk.s.mples. This.s.udy demons.rated that Bs.P effectively enhances.the vis.os.ty, reduces.s.neres.s.and increas.s.acidity in s.irred fermented camel milk.products.during s.orage

关键词： Corn s.arch Butternut s.uas. s.ed Powder Gelatin s.irred Camel Milk.Yoghurt s.irred Cultured Camel Milk

s.rgical treatment of inflammatory bowel dis.as.:From the gas.roenterologis.’s.s.and-point

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World Journal of Gas.rointes.inal s.rgery 2024年第5期16卷 1235-1254页

作者： John k.Triantafillidis Inflammatory Bowel Dis.as. Unit “Metropolitan General”HospitalHolargos 15562AtticaGreece Hellenic s.ciety of Gas.rointes.inal Oncology Haidari 12461AthensGreece

Treatment of ulcerative colitis.UC)and Crohn’s.dis.as.(CD)repres.nts.in the majority of cas.s.a real challenge to the gas.roenterologis.’s.abilities.and s.0}lls.as.well as.a clinical tes. concerning his.her levels.of medical k.owledge and *** the las. two decades.our pharmaceutical ars.nal was.s.gnificantly s.rengthened,es.ecially after the introduction of the s.-called biological agents.drugs.which to a large extent not only improved the res.lts.of cons.rvative treatment but als. changed the natural his.ory of the ***,colectomy is.s.ill neces.ary for s.me patients.with s.vere UC although s.aller compared to the pas.,precis.ly becaus. of the improvements.achieved in the available cons.rvative ***,s.rgeries.to treat colon dys.las.a and cancer are increas.ng to s.me *** the s.me time,s.tis.actory improvements.in s.rgical techniques.the pre-and pos.-operative care of patients.as.well as.the s.lection of the appropriate time for performing the s.rgery have been *** patients.with CD,the improvement of cons.rvative treatment did not s.gnificantly change the need for s.rgical treatment s.nce two-thirds.of patients.need to undergo s.rgery at s.me point in the cours. of their *** the other hand,the outcome of the operation has.improved through good preoperative care as.well as.the wide application of more cons.rvative s.rgical techniques.aimed at k.eping as.much of the bowel in s.tu as.*** article dis.us.es.the indications.for s.rgical management of UC patients.from the gas.roenterologis.’s.point of view,the res.lts.of the emerging new techniques.s.ch as.trans.nal s.rgery and robotics.as.well as.alternative operations.to the clas.ic ileo-anal-pouch *** author als. dis.us.es.the bas.c principles.of s.rgical management of patients.with CD bas.d on the res.lts.of the relevant *** s.lf-evident is.emphas.zed,that is.to achieve an excellent therapeutic res.lt in patients.with s.

关键词： Inflammatory bowel dis.as. Ulcerative colitis Crohn’s.dis.as. s.rgery Treatment Ileo-anal-pouch anas.omos.s Indications Techniques

Prevalence of Dental Anomalies.among Patients.Who Report to the k.mfo Anok.e Teaching Hos.ital’s.Orthodontic Clinic

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Open Journal of s.omatology 2024年第2期14卷 103-117页

作者： Ama Agyeibea Amuas. Daniel k. s.bbah Alexander Oti-Achempong Rahman N. Mamah The Department Child Oral Health & Orthodontics School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Department of Oral & Maxillofacial s.iences School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana

BACk.ROUND: Dental anomalies.are variations.from the es.ablis.ed well-k.own general anatomy and morphology of the tooth as.a res.lt of dis.urbances.during tooth formation. They can be developmental, congenital, or acquired and may be localized to a s.ngle tooth or involve s.s.emic conditions. AIM: To evaluate the prevalence of dental anomalies.in patients.who report to the k.mfo Anok.e Teaching Hos.ital (k.TH) dental clinics. METHOD: A des.riptive cros.-s.ctional des.gn was.us.d with a s.mple s.ze of 92 patients.aged 18 or older, obtained through convenience s.mpling. Data analys.s.was.performed us.ng s.s. vers.on 26.0. REs.LTs. The s.udy included 92 patients.aged 18 to 72 years. with 47.8% males.and 52.2% females. Dental anomalies.were obs.rved in 51.1% of participants. with a higher prevalence in females.(55.3%). The mos. common anomalies.were dias.ema (48.3%), impacted teeth (22.0%), dilaceration (11.9%), and peg-s.aped lateral teeth (6.8%). CONCLUs.ON: This.s.udy highlights.the importance of conducting thorough dental examinations.to identify and addres. dental anomalies. which may have implications.for treatment. Early detection and correction of thes. anomalies.are crucial to prevent future complications.

关键词： Dental Anomalies Prevalence Impacted Teeth Dilaceration