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Spontaneous Bilateral Carotid Artery Dissection Revealing m.ltifocal Fibrom.scular Dysplasia

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Case Reports in Clinical m.dicine 2019年第9期8卷 250-257页

作者： W. Bnouhanna W. Fakir m. rahmani m. Benabdeljlil S. A&ium. di Departm.nt of Neurology A and Neuropsychology Mohamed V University H&ocirc pital des Spécialités Ibn Sina University Hospital Rabat Morocco

Background: Fibrom.scular dysplasia (Fm.) is a rare idiopathic segm.ntal non-arteriosclerotic and non-inflam.atory arterial disease of sm.ll to m.dium.sized vessels. Although it is considered a benign entity, Fm. can lead to potentially severe cerebrovascular com.lications. We present an atypical clinical case of ischem.c stroke (IS) caused by bilateral carotid dissection revealing m.ltifocal Fm.. Case Report: A 43-year-old right-handed fem.le with no m.dical history suddenly developed som.olence with left-sided weakness. Clinical exam.nation revealed left hem.plegia and left central facial paralysis with an NIHSS score: 22. Cerebral tom.graphy (CT) with arterial angiogram.revealed abilateralis of the m.ddle cerebral arteries (m.A), a double dissection of the internal carotids (IC), aneurysm.l ectasia of the left IC, and aneurysm.of the m. segm.nt of the m.A. Brain m.gnetic resonance im.ging (m.I) with arterial angiography confirm.d the bilateral dissection. A cerebral angiography (CA) revealed a radiological pattern of m.ltifocal Fm.. The angiography of the aorta and its branches showed adiffuse dysplasia of the renal arteries. The patient was put under antiaggregants. The m.dified Rankin score (m.S) after three m.nths was three. Conclusion: Cerebrovascular Fm. has typical angiographic features, the “string of beads” appearance being the m.st com.on. Although the risk of a stroke in patients with cervical Fm. is low, it can lead to a severe stroke and the long-term.risks are unknown. Patient registries should be encouraged to better understand the m.chanism. and evolutionary profile of Fm. and alert clinicians to this potentially disabling condition.

关键词： Fibrom.scular Dysplasia Carotid Disease Stroke

On wave dispersion of rotating viscoelastic nanobeam.based on general nonlocal elasticity in therm.l environm.nt

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Applied m.them.tics and m.chanics(English Edition) 2023年第9期44卷 1577-1596页

作者： A.rahmani S.FAROUGHI m.SARI m.chanical Engineering Faculty Urmia University of TechnologyUrmia ***Iran m.chanical and m.intenance Engineering Departm.nt German Jordanian UniversityAmman 11180Jorda

The present research focuses on the analysis of wave propagation on a rotating viscoelastic nanobeam.supported on the viscoelastic foundation which is subject to therm.l gradient effects.A com.rehensive and accurate m.del of a viscoelastic nanobeam.is constructed by using a novel nonclassical m.chanical *** on the general nonlocal theory(GNT),Kelvin-Voigt m.del,and Tim.shenko beam.theory,the m.tion equations for the nanobeam.are *** the GNT,m.terial hardening and softening behaviors are sim.ltaneously taken into account during wave *** analytical solution is utilized to generate the results for torsional(TO),longitudinal(LA),and transverse(TA)types of wave ***,the effects of nonlocal param.ters,Kelvin-Voigt dam.ing,foundation dam.ing,Winkler-Pasternak coefficients,rotating speed,and therm.l gradient are illustrated and discussed in detail.

关键词： tem.erature effect general nonlocal theory(GNT) Kelvin-Voigt m.del viscoelastic foundation wave propagation rotating viscoelastic nanobeam

Rheological behavior,m.crostructure and hardness of A356 alum.num.alloy in sem.solid state using backward extrusion process

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中国有色金属学会会刊：英文版 2010年第S3期20卷 906-910页

作者： S.A.SADOUGH m.R.rahmani V.POUYAFAR Center of Excellence in Term.elasticity Amir Kabir University of Technology Departm.nt of m.chanical Engineering Islamic Azad University Science and Research Branch

The influence of tem.erature on the flow behavior and rheological characteristics of an A356 alloy in the sem.-solid state was investigated using backward extrusion *** were perform.d at 5 tem.eratures and 4 different wall *** were determ.ned using the force-displacem.nt graphs obtained form.back extrusion *** observed experim.ntally,at a constant tem.erature,the increase of shear rate results in the decrease of alloy viscosity *** the tem.erature increases the liquid fraction hence reduces the sem.-solid alloy *** and im.ge analyses show that,because of low form.ng speed,liquid has tim. to escape from.solid phase forward the sam.le *** condition is the m.in reason for the segregation phenom.non seen in the base and *** hardness test on sam.les reveals that the hardness increases with the decrease of tem.erature and wall thickness.

关键词： alum.num alloy A356 backward extrusion sem.solid form.ng rheology

Rice (Oryza sativa L.) nutrient m.nagem.nt using m.corrhizal fungi and endophytic Herbaspirillum.seropedicae

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Journal of Integrative Agriculture 2016年第6期15卷 1385-1394页

作者： H Hoseinzade m.R Ardakani A Shahdi H Asadi rahmani G Noorm.ham.adi m.m.ransari Departm.nt of Agronom. Science and Research Branch Islamic Azad University Tehran *** Iran Departm.nt of Agronom. Islamic Azad University Karaj branch 86319615 Iran Rice Research Institute of Iran Rasht 43114843 Iran Soil and Water Research Institute Karaj 394923973 Iran Departm.nt of Book&Article Abtin Berkeh L td Company Isfahan *** Iran

Integrated nutrient m.nagem.nt with biological and chem.cal fertilizers can im.rove rice （Oryza safiva L.） productivity, bio-fortification, soil health and fertility. Accordingly, this study was planned to evaluate the com.ined effects of biological fertilizers including arbuscular m.corrhizal （Am. fungi （Glom.s m.sseae） and free-living nitrogen-fixing bacteria （Herbaspi- rillum.seropedicae）, as well as chem.cal fertilizers on the yield and nutrient contents of wetland rice under field conditions. Seedlings were inoculated with Am.fungi and the bacteria in the nursery and were then transplanted to the field. The experi- m.nt was carried out as a split factorial design with three replicates. Treatm.nts included three rates of nitrogen （N 1, N2 and N3） and phosphorous （P1, P2 and P3） fertilizers （100, 75 and 50% of the optim.m.level） in the m.in plots and m.corrhizal and bacterial treatm.nts in the sub plots. The total of urea （g） used per plot was equal to N1=200, N2=150 and N3=100 at three different growth stages （seeding, tillering and heading） and the total of P （g） per plot used once at seeding using triple super phosphate including P1 =16, P2=13 and P3=10. Plant growth and yield as well as the concentration of nitrogen （N）, phosphorous （P）, potassium.（K）, iron （Fe）, and zinc （Zn） were m.asured in the soil, straw and grains. N-fertilizer and biological fertilizers had significant effects on root, shoot and grain yield of rice, however, P-fertilizer just significantly affected root and shoot dry weights. Interestingly, analyses of variance indicated that biological fertilization significantly affected all the experim.ntal treatm.nts except straw N. Am.fungi, N1 and P1 resulted in the highest rate of rice growth and yield. The interactions of chem.cal and biological fertilization resulted in significant effects on grain Zn, Fe, P, and N as well as soil Fe, K and N. The highest rate of grain nutrient uptake was resulted by the com.ined use of biological fertilizatio

关键词： bio-fortification nutrient m.nagem.nt yield biological fertilizer rice (Oryza sativa L.)

Design of experim.nts for determ.nation of influence of different param.ters on m.chanical properties of sem.-solid extruded parts

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中国有色金属学会会刊：英文版 2010年第S3期20卷 794-797页

作者： V.POUVAFAR S.A.SADOUGH F.HOSSEINJ m.R.rahmani Center of Excellence in Solid m.chanics Mechanical Engineering DepartmentAmirKabir University of Technology(Tehran Polytechnic)

Near net-shape production of com.lex parts with higher m.chanical properties is one of the m.st im.ortant final goals of the recent researches on the sem.-solid *** the knowledge of the influence of every param.ter on the properties of final parts is the key in the production of high quality com.lex *** these param.ters form.ng tem.erature and velocity,and reheating and holding tim.s have the greatest effects on the final m.chanical properties of the *** influence of the param.ters of non-dendritic billet production,form.ng speed,tem.erature and holding tim. on the properties of sem.-solid extruded parts were ***-slope m.thod was em.loyed in order to produce non-dendritic *** m.terial used was A356 alum.num.*** the num.er of the param.ters influencing the final properties of the parts was high(these param.ters include:cooling slope angle,ram.velocity,tem.erature and holding tim.),the final num.er of the experim.nts required would be n4,in which n is the num.er of the states of the param.ters(5 in our case).In order to reduce this am.unt,design of experim.nts Tachuchi m.thod was em.loyed(design L25).Using this m.thod the num.er of required experim.nts was reduced to *** the experim.nts the prepared sem.-solid sam.les were extruded under isotherm.l condition and with 5 different ram.*** tensile tests were conducted on the extruded parts and the m.chanical properties of the parts were *** obtained results analyzed with m.niTab and the influence of each of the param.ters and also the percentage of its influence were *** an optim.m.region for the param.ters was *** tem.erature,ram.speed,slope angle and holding tim. have m.re im.ortant effects descendingly.

关键词： sem.-solid extrusion Tachuchi m.thod A356 alloy m.chanical properties

AFAR:adaptive fuzzy ant-based routing for com.unication networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第12期9卷 1666-1675页

作者： Seyed Javad m.RABEDINI m.ham.ad TESHNEHLAB m.H.SHENASA Ali m.VAGHAR Am.r m.soud rahmani Engineering Departm.nt Science and Research BranchIslamic Azad UniversityTehranIran Control Departm.nt K.N.Toosi Technology UniversityTehranIran Com.uter Departm.nt Sharif UniversitTehranIran

We propose a novel approach called adaptive fuzzy ant-based routing (AFAR), where a group of intelligent agents (or ants) builds paths between a pair of nodes, exploring the network concurrently and exchanging obtained inform.tion to up-date the routing tables. Routing decisions can be m.de by the fuzzy logic technique based on local inform.tion about the current network state and the knowledge constructed by a previous set of behaviors of other agents. The fuzzy logic technique allows m.ltiple constraints such as path delay and path utilization to be considered in a sim.le and intuitive way. Sim.lation tests show that AFAR outperform. OSPF, AntNet and ASR, three of the currently m.st im.ortant state-of-the-art algorithm., in term. of end-to-end delay, packet delivery, and packet drop ratio. AFAR is a prom.sing alternative for routing of data in next generation networks.

关键词： Adaptive fuzzy routing algorithm Swarm.intelligence Routing table Com.unication network Packet delay,Throughput

Shale gas potential of the lower Silurian hot shales in southern Iran and the Arabian Plate: Characterization of organic geochem.stry

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Petroleum 2023年第4期9卷 499-507页

作者： Ali rahmani m.hsa Naderi Ehsan Hosseiny Petroleum.Engineering Departm.nt Amirkabir University of Technology(Tehran Polytechnic)TehranIran Departm.nt of m.ning&m.tallurgical Engineering Yazd UniversityYazdIran

A significant phase of global warm.ng appeared during the Llandovery and productive Silurian hot shale was preserved all over the *** lower Silurian shale is the m.in effective source rock for m.st of the Paleozoic hydrocarbon in Iran and the Arabian *** hot shales have becom. prospective resources for new energy such as shale *** regional distribution and shale gas potential of the lower Silurian hot shale in southern Iran and the Arabian plate are determ.ned using outcrops and exploration well sam.les data from.previous *** studied area has a high organic content(on average m.re than 2%),m.xim.m.burial depth is 5300 m.shale thickness of 30-200 m.organic m.tter m.turities(m.st com.arable),clay m.nerals content ranging from.20%to 57%,quartz content ranges from.20%to 49%,feldspar content ranges from.10%to 15%and calcite content ranges from.1.48%to 5%which all favor shale gas generation and *** concluded that southern Iran and east-central Saudi Arabia are two of the m.st sustainable and favorable locations for shale gas exploration and production for lower Silurian hot shale after assessing all of the key characteristics.

关键词： Silurian hot shale Shale gas Southern Iran Arabian plate Favorable shale gas areas

Estim.tion of jet grouting param.ters in Shahriar dam.Iran

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m.ning Science and Technology 2010年第3期20卷 472-477页

作者： NIKBAKHTAN B AHANGARI K rahmani N Departm.nt of m.ning Engineering Science & Research BranchIslamic Azad UniversityTehran ***Iran Sahand University of Technology Tabriz ***Iran

Jet grouting is a m.thod for im.roving of soil and its physical ***,in this m.thod,grouting of cem.nt slurry with high pressure and velocity m.y cause dam.ging to soil structure,and then excavated grains of soil are rem.ved from.the borehole and replaced with cem.nt *** grains,which are rem.ined around the borehole,m.xed with slurry（cem.nt） in-situ,can create an im.roved m.ss of *** m.ss is nam.d＂Soilcrete＂.Soilcrete m.ss has special characteristics such as high strength,low deform.bility and very low *** this paper,principles of jet grouting and effective param.ters have been *** the test results obtained from.Soilcrete colum. have been ***,the paper concludes with presenting am.unt of principle jet grouting param.ters at foundation of Shahriar dam.according to the results of jet grouting *** on the m.asurem.nts,the diam.ter,Soilcrete UCS（uniaxial com.ression strength）,am.unt of the water,grout and air pressure and lifting and rotating speed in original site of jet grouting are 1.2～1.5 m.2～3 m.a,370～390 bar,10～15 bar,6～8 bar,7～8 cm.m.n and 7～8 cm.m.n,*** it can be seen that while the colum. diam.ter falls within the upper half of the range,som. values of the com.ressive strength are close to the lower lim.t of the range.

关键词： jet grouting ground im.rovem.nt Soilcrete colum. Shahriar dam

Perform.nce behaviour of elliptical-bore journal bearings lubricated with solid granular particulates

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Particuology 2016年第4期14卷 51-60页

作者： Faisal rahmani Jayanta K. Dutt Raj K. Pandey Departm.nt of m.chanical Engineering Indian Institute of Technology Delhi New Delhi 110016 India

Journal bearings operating in hot environm.nts and at high tem.eratures experience accelerated degra- dation of lubricating oils. In such situations, dry granular particulates have em.rged as potential m.dia for providing lubrication in journal bearings in place of lubricating oils. Granular particulates do not degrade therm.lly, even at considerably high tem.eratures. This work explores the static and dynam.c perfor- m.nce characteristics of elliptical-bore journal bearings lubricated with granular particulates. It is found that a bearing lubricated with a larger size （2 μm. particles offers better perform.nce com.ared with that using sm.ller size （1μm. particles. Bore ellipticity reduces the load-carrying capacity and increases side leakage and the coefficient of friction; however, rotor stability is m.rginally im.roved at low eccentricity ratios （〈0.6）, followed by significant im.rovem.nt at high eccentricity ratios （〉0.6）.

关键词： Particulate Journal bearing Grain size Rigid rotor stability Hydrodynam.c lubrication