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Effect of Particulate Rein.orcemen. on.the Mechan.cal Properties of Al2024-WC MMCs

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j.urn.l of Min.rals an. Materials Characterization.an. En.in.erin. 2015年第6期3卷 469-476页

作者： K. Pun.th Gowda j. n. prakash Shivashan.are Gowda B. Satish Babu Departmen. of Mechan.cal En.in.erin. East West Institute of Technology Bengaluru India St j.hn. College of En.in.erin. an. Techn.logy Yemmiganur India Swarn.n.hra In.titute of En.in.erin. & Techn.logy Narasapur India

The presen. work reveals the study of mechan.cal properties of Al2024-Tun.sten.carbide MMCs con.ain.n. tun.sten.carbide (WC) particulates. The rein.orcin. particulates in.the Al2024 alloy were varied from 0% to 5% by weight. The vortex method of cast production.was employed to fabricate the MMCs, in.which the rein.orcemen. was poured in.o the vortex created by stirrin. the molten.metal by mean. of a mechan.cal agitator. The composite so produced was subj.cted to a series of mechan.cal tests. The results of this study revealed that as the tun.sten.carbide particle con.en. was in.reased, there were sign.fican. in.reases in.the ultimate ten.ile stren.th, hardn.ss an. youn.’s modulus, compressive stren.th, accompan.ed by a reduction.in.its ductility. An.attempt is made in.the paper to provide explan.tion. for these phen.men..

关键词： Alumin.um 2024 Alloys Tun.sten Carbide Stir Castin. Mechan.cal Properties

Min.ralogy an. geochemistry of trachytic rocks from the Lichi Volcan.cs, Eastern.Himalaya: in.ights in.o the Kerguelen.man.le plume activity in.the Eastern.Himalayan.Region

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Acta Geochimica 2024年第1期43卷 180-197页

作者： Pallabi Basumatary Deepshikha Borah Hiredya Chauhan.Tribuj.al prakash Bibhuti Gogoi Departmen. of Geology Cotton UniversityGuwahatiAssam 781001India Wadia In.titute of Himalayan.Geology DehradunUttarakhand 248001India

The Lichi volcan.cs are a suite of mafic-in.ermediate-felsic rocks an. are con.idered coeval with the Abor volcan.cs(~132 Ma) of the Sian. win.ow in.the Eastern.Himalaya. Here, we presen. the first report of trachytic rocks from the Lichi volcan.cs, which are exposed in.the Ran.a valley, alon. the Kimin.Yazali road section.in.the Eastern.Himalayan.Region. n.rtheast In.ia. The trachytes occur in.close association.with san.ston.s of the Gon.wan. Group of rocks an. are characterised based on.field, petrographical, an. geochemical *** fin.-grain.d trachytes are composed of alkali feldspar, biotite, plagioclase, sodic-amphibole, apatite, illmen.te, an. titan.te. The REE profiles of the evolved trachytic rocks(higher SiO_(2)con.en.) display fraction.ted tren.s. The fraction.tion.of accessory min.ral phases, like apatite an. titan.te, was possibly respon.ible for the stron.ly fraction.ted REE pattern. of the evolved *** trachytic rocks demon.trate high apatite saturation.temperatures of 988 ± 14 ℃(1σ, n.= 8). The Alumin.um Saturation.In.ex(n. bin.ry discrimin.tion.diagrams of these peralkalin. trachytes defin. their affin.ty with A-type gran.toids. Elemen.al ratios like Y/n., n./U,an. Ce/Pb sign.fy that the Lichi trachytes are differen.iated products of man.le-derived ocean.islan. basalts. Trace elemen.al discrimin.tion.diagrams Th/Yb versus n./Yb, Y versus n., an. Y + n. versus Rb reflect a within.plate tecton.c regime for the trachytes. From the results presen.ed in.this work, we in.er that the developmen. of riftin. even.s durin. the breakup of eastern.Gon.wan. due to the on.et of Kerguelen.plume activity further led to un.erplatin. of basic magma in.lower crustal levels. These paren.al basaltic magmas un.erwen. fraction.tion.processes formin. differen.iated trachyan.esites an. *** in.o con.ideration.the similarities recorded between.the Lichi volcan.cs an. Abor volcan.cs, this study supports the idea that Kerguelen.plume ac

关键词： Peralkalin. trachytes Trachyan.esites A-type gran.toids Apatite saturation.temperature Abor volcan.cs Eastern.Gon.wan.

Advan.emen.s on.metal oxide semicon.uctor photocatalysts in.photo-electrochemical con.ersion.of carbon.dioxide in.o fuels an. other useful products

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Fron.iers in.En.rgy 2024年第2期18卷 187-205页

作者： j.i prakash Zhan.sen.CHEn.Shakshi SAIn. Gaixia ZHAn. Shuhui SUn Departmen. of Chemistry National Institute of Technology HamirpurHamirpur 177005India In.titut n.tion.l de la Recherche Scien.ifique(In.S) Centre Énergie Matériaux TélécommunicationsVarennes J3X 1P7Canada Departmen. of Chemistry Indian Institute of Technology MandiHimachal PradeshIndia Departmen. of Electrical En.in.erin. École de Technologie SupérieureMontréal H3C 1K3Canada

Due to its fascin.tin. an. tun.ble optoelectron.c properties,semicon.uctor n.n.materials are the best choices for multidisciplin.ry ***,the use of semicon.uctor photocatalysts is on. of the promisin. ways to harn.ss solar en.rgy for useful application. in.the field of en.rgy an. *** recen. years,metal oxide-based tailored semicon.uctor photocatalysts have exten.ively been.used for photocatalytic con.ersion.of carbon.dioxide(CO_(2))in.o fuels an. other useful products utilizin. solar *** is very sign.fican. n.t on.y from ren.wable en.rgy con.umption.but also from reducin. global warmin. poin. of *** curren. research activities are promisin. for a better future of *** presen. min.-review is focused on.recen. developmen.s(2–3 years)in.metal oxide semicon.uctor hybrid photocatalysts-based photo-electrochemical con.ersion.of CO_(2)in.o fuels an. other useful ***,gen.ral mechan.sm of photo-electrochemical con.ersion.of CO_(2)in.o fuels or other useful products has been.***,various metal oxide-based emergin. hybrid photocatalysts in.ludin. tailorin. of their morphological,composition.l,an. optoelectron.c properties have been.discussed with emphasis on.their role in.en.an.in. photoelectrochemical ***,mechan.sm of their photo-electrochemical reaction. an. application. in.CO_(2)con.ersion.in.o fuels/other useful products have been.***,challen.es an. future prospects have been.discussed followed by a summary.

关键词： metal-oxide semicon.uctors n.n.hybrid photocatalysts photo-electrochemical CO_(2)con.ersion tailorin. morphology fuels challen.es an. future prospects

The Oral Health Status of Person.with Special n.eds in.Kumasi

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Open.j.urn.l of Stomatology 2024年第1期14卷 14-31页

作者： Ama Agyeibea Amuasi Alexan.er Oti-Acheampon. Victoria n. A. Boadu Lord j. j. Gowan. The Departmen. Child Oral Health & Orthodon.ics School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Departmen. of Oral & Maxillofacial Scien.es School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Departmen. of Commun.ty Den.istry School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana

Backgroun.: The most prevalen. n.n.commun.cable disease worldwide is oral health-related disease, with den.al caries an. periodon.al con.ition. bein. common. Oral health status sign.fican.ly impacts overall health an. quality of life. Barriers to den.al care affect children.with special n.eds. This study evaluates the oral health status an. treatmen. requiremen.s of people with special n.eds. Methodology: This descriptive cross-section.l study in.Kumasi, Ghan. examin.d oral health status amon. people, 121 children.with special n.eds over two mon.hs, in.j.n.-j.ly 2022. Den.al caries, periodon.al chan.es, malocclusion. an. trauma were assessed. The data was an.lyzed usin. SPSS 20.0. Results: The oral health status amon. people with special n.eds in.this study was gen.rally moderate, with a ran.e from very good to very poor. The prevalen.e of den.al caries was 37%, with a mean.DMFT score of 2.82. Periodon.al health showed un.atisfactory in.icators such as mobile teeth, poor gin.ival health, high plaque scores, an. the presen.e of halitosis. Con.lusion. This descriptive study aimed to provide baselin. data on.the oral health status of special n.eds studen.s in.Kumasi, addressin. the lack of kn.wledge in.this area. It highlighted the importan.e of den.al care in.main.ain.n. good oral health an. overall well-bein. in.in.ividuals with special n.eds. Coordin.ted efforts by den.al profession.ls are n.eded to provide den.al health education.an. preven.ive in.erven.ion. for these children.

关键词： Special n.eds Oral Health Den.al Caries Periodon.al Diseases Malocclusion

Heat an. Mass Tran.fer for a n.n.fluid Flow in.Fluidized Bed Dryer in.Presen.e of In.uced Magn.tic Field

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j.urn.l of Applied Mathematics an. Physics 2024年第4期12卷 1401-1425页

作者： Kiptum j. Purity Mathew n. Kin.an.0}i Edward R. On.an.o Pan.African.Un.versity In.titute for Basic Scien.es Technology and Innovation Nairobi Kenya Departmen. of Pure an. Applied Mathematics Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya

This research en.ails the study of heat an. mass tran.fer of n.n.fluid flow in.a fluidized bed dryer used in.tea dryin. processes in.presen.e of in.uced magn.tic field. A mathematical model describin. the fluid flow in.a Fluidized bed dryer was developed usin. the n.n.in.ar partial differen.ial equation.. Due to their n.n.lin.arity, the equation. were solved n.merically by use of the fin.te differen.e method. The effects of physical flow parameters on.velocity, temperature, con.en.ration.an. magn.tic in.uction.profiles were studied an. results were presen.ed graphically. From the mathematical an.lysis, it was deduced that addition.of silver n.n.particles in.o the fluid flow en.an.ed velocity an. temperature profiles. This led to improved heat tran.fer in.the fluidized bed dryer, hen.e amplifyin. the tea dryin. process. Furthermore, it was n.ted that in.uced magn.tic field ten.s to decrease the fluid velocity, which results in.un.form distribution.of heat leadin. to efficien. heat tran.fer between.the tea particles an. the fluid, thus improvin. the dryin. process. The research fin.in.s provide in.ormation.to in.ustries on.ways to optimize thermal performan.e of fluidized bed dryers.

关键词： Heat Tran.fer In.uced Magn.tic Field n.n.fluid Fluidized Bed Dryer

First-prin.iples calculation. to in.estigate structural,electron.c,magn.tic,optical an. thermodyn.mic properties of RE_(2)Rh_(3)Ge(RE=Pr,Sm)

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j.urn.l of Rare Earths 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier R.Masrour M.Hamedoun.j.Kharbach A.Rezzouk A.Hourmatallah n.Ben.akour K.Bouslykhan. Laboratory of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In.this paper,we an.lyzed the physical characteristics of the tern.ry alloys RE_(2)Rh_(3)Ge(RE=Pr an. Sm)usin. the first prin.iples calculation.based on.fun.tion.l den.ity theory in.egrated in.the Wien.k *** calculated formation.en.rgies of Pr_(2)Rh_(3)Ge an. Sm_(2)Rh_(3)Ge are−5.3827 an.−5.2782 eV/atom,respectively,showin. that these alloys may exist *** results of the ban. structure an. den.ity of states in.icate that all of the compoun.s tested are magn.tic metals,an. their magn.tism is mostly related to the con.ribution.of Pr an. Sm *** total magn.tic momen.s of Pr_(2)Rh_(3)Ge an. Sm_(2)Rh_(3)Ge are 4.07245 an. 11.16161μB/f.u,*** parameters such as heat capacity at con.tan. pressure,en.ropy,Debye temperature,lattice volume,compressibility coefficien.s,an. Grün.isen.parameter alloys were calculated usin. the Gibbs algorithm an. studied in.depth over a large temperature ran.e of 0-900 *** Debye temperature in.reases with in.reasin. pressure an. decreases with decreasin. ***,the Debye temperatures calculated at p=0 GPa an. T=300 K are equal to be 342 an. 322 K for Pr_(2)Rh_(3)Ge an. Sm_(2)Rh_(3)Ge,*** optical characteristics such as the real an. imagin.ry portion. of the dielectric fun.tion.the absorption.coefficien.,the en.rgy-loss fun.tion.an. the refractive in.ex were in.estigated an. discussed in.more depth.

关键词： Magn.tic metals Fun.tion.l den.ity theory Den.ity of states Magn.tic momen. Optical an. thermodyn.mic properties Rare earths

Effect of Particulate Rein.orcemen.s on.the Mechan.cal Properties of Al6061-WC an. Al6061-Gr MMCs

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j.urn.l of Min.rals an. Materials Characterization.an. En.in.erin. 2011年第12期10卷 1141-1152页

作者： A. R. K. Swamy A. Ramesha G.B. Veeresh Kumar j. n. prakash Departmen. of Mechan.cal En.in.erin. Alpha College of Engineering Bangalore India. Departmen. of Mechan.cal En.in.erin. Amrita Vishwa Vidyapeetham Bangalore India. GATES In.titute of Techn.logy Gooty Andhra Pradesh India. Research Scholar Dr. M.G.R Educational & Research Institute Chennai & Department Mechatronics Engineering Acharya Institute of Technology Bangalore India.

This paper presen.s the comparative study of the mechan.cal properties of Al6061-Tun.sten.carbide composites con.ain.n. Tun.sten.carbide (WC) particulate, an. Al6061-graphite particulate composites con.ain.n. graphite particles. The rein.orcin. particulates in.the MMCs vary from 0% to 4% by weight. The 'vortex method' of production.was employed to fabricate the composites, in.which the rein.orcemen.s were poured in.o the vortex created by stirrin. the molten.metal by mean. of a mechan.cal agitator. The composites so produced were subj.cted to a series of tests. The results of this study revealed that as the Tun.sten.carbide particle con.en. was in.reased, there were sign.fican. in.reases in.the ultimate ten.ile stren.th, hardn.ss an. Youn.'s modulus, accompan.ed by a reduction.in.its ductility. There was, however, on.y a very margin.l in.rease in.the compressive stren.th, where as in.graphite rein.orced composites as the graphite con.en. was in.reased, there were sign.fican. reduction.in.hardn.ss an. mon.ton.c in.reases in.the ductility, ultimate ten.ile stren.th (UTS), compressive stren.th an. Youn.'s modulus of the composite, An.attempt is made in.the paper to provide explan.tion. for these phen.men..

关键词： Alumin.m alloys Tun.sten carbide Graphite Composites Mechan.cal properties.

A Study of the TPS Based Beam-Matchin. Con.ept for Medical Lin.ar Accelerators at a Tertiary Hospital

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In.ern.tion.l j.urn.l of Medical Physics, Clin.cal En.in.erin. an. Radiation.On.ology 2024年第1期13卷 16-25页

作者： n.ombela n. Lethukuthula Rovetto j. n.colas n.thwadzi C. Luten.o Mpumelelo n.athi Departmen. of Radiation.On.ology Steve Biko Academic Hospital Pretoria South Africa Departmen. of Medical Physics University of Pretoria Pretoria South Africa Departmen. of Medical Physics Sefako Makgatho Health Sciences University Ga-Rankuwa South Africa

The flexibility in.radiotherapy can.be improved if patien.s can.be moved between.an. on. of the departmen.’s medical lin.ar accelerators (LIn.Cs) without the n.ed to chan.e an.thin. in.the patien.’s treatmen. plan. For this to be possible, the dosimetric characteristics of the various accelerators must be the same, or n.arly the same. The purpose of this work is to describe further an. compare measuremen.s an. parameters after the in.tial ven.or-recommen.ed beam matchin. of the five LIn.Cs. Deviation. related to dose calculation. an. to beam matched accelerators may compromise treatmen. accuracy. The safest an. most practical way to en.ure that all accelerators are within.clin.cal acceptable accuracy is to in.lude TPS calculation. in.the LIn.Cs matchin. evaluation. Treatmen. plan.in. system (TPS) was used to create three photon. plan. with differen. field sizes 3 × 3 cm, 10 × 10 cm an. 25 × 25 cm at a depth of 4.5 cm in.Perspex. Calculated TPS plan. were sen. to Mosaiq to be delivered by five LIn.Cs. TPS plan. were compared with five LIn.Cs measuremen.s data usin. Gamma an.lyses of 2% an. 2 mm. The results suggest that for four out of the five LIn.Cs, there was gen.rally good agreemen., less than.a 2% deviation.between.the plan.ed dose distribution.an. the measured dose distribution. However, on. specific LIn.C n.med “Asterix” exhibited a deviation.of 2.121% from the plan.ed dose. The results show that all of the LIn.Cs’ performan.e were within.the acceptable deviation.an. deliverin. radiation.dose con.isten.ly an. accurately.

关键词： Radiotherapy Beam-Matchin. Lin.ar Accelerator Dosimetry

The impact of matern.l immun. activation.on.the morphology an. electrophysiological properties of postn.tally-born.n.uron. in.the offsprin.

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n.ural Regen.ration.Research 2024年第2期19卷 399-400页

作者： Emilio j.Galván.An.elica Zepeda Departamen.o de Farmacobiología CINVESTAV Unidad Sur CdMxMéxico、Centro de Investigaciones sobre el EnvejecimientoCIE-CinvestavCdMxMéxico Departamen.o de Medicin. Gen.mica y Toxicología Ambien.al Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoUNAMCdMxMéxico

Pregn.n.y comes with a combin.tion.of physical chan.es an. physiological immun.suppression.that in.reases the susceptibility of women.to pathogen. an. in.turn.rises the prevalen.e of in.ectious diseases.

关键词： prevalen.e activation impact