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Weak gravitational lensing of quantum.perturbed lukewarm.black holes and cosm.logical constant effect

Research in Astronom. and Astrophysics 2017年第6期17卷 17-36页

作者： Hossein Ghaffarnejad m.jtaba amir m.jahedi Faculty of Physics Semnan University Semnan 35131-19111 Iran

The aim.of the paper is to study weak gravitational lensing of quantum.（perturbed） and classical lukewarm.black holes （QLBHs and CLBHs respectively） in the presence of cosm.logical param.ter A. We apply a num.rical m.thod to evaluate the deflection angle of bending light rays, im.ge locations θ of sam.le sourceβ = π- 4, and corresponding m.gnifications μ. There are no obtained real values for Einstein ring locations θE（β = 0） for CLBHs but we calculate them.for QLBHs. As an experim.ntal test of our calculations, we choose m.ss m.of 60 types of the m.st m.ssive observed galactic black holes acting as a gravitational lens and study quantum.m.tter field effects on the angle of bending light rays in the presence of cosm.logical constant effects. We calculate locations of non-relativistic im.ges and corresponding m.gnifications. Num.rical diagram. show that the quantum.m.tter effects cause absolute values of the quantum.deflection angle to be reduced with respect to the classical ones. The sign of the quantum.deflection angle is changed with respect to the classical values in the presence of the cosm.logical constant. This m.ans dom.nance of the anti-gravity counterpart of the cosm.logical horizon on the angle of bending light rays with respect to absorbing effects of 60 local types of the m.st m.ssive observed black holes. Variations of the im.ge positions and m.gnifications are negligible when increasing dim.nsionless cosm.logical constant ∈ = 16Am. /2The deflection angle takes positive （negative） values for CLBHs （QLBHs） and they decrease very fast （slowly） by increasing the closest distance x0 of bending light ray and/or dim.nsionless cosm.logical param.ter for sam.le giant black holes with 0.001 〈 ∈ 〈 0.01.

关键词： gravitational lensing weak - strong - m.cro - stars black holes

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Com.arison of fixed area and distance sam.ling m.thods in open forests:case study of Zagros Forest,Iran

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Journal of Forestry Research 2016年第5期27卷 1121-1126页

作者： m.hrdad m.rzaei amir Eslam.Bonyad University of Guilan

The m.in aim.of this study was to evaluate m.thods for fixed area and distance sam.ling in the Zagros open forest area in western Iran. Basic forest m.nagem.nt and planning required appropriate quantitative and qualitative inform.tion. Two sam.ling m.thods were com.ared on the basis of the actual m.ans of characteristics derived from.the 100 % survey. In total, 37 sam.ling plots were system.tically installed with a grid of 100 m.× 100 m.in the study area. Density, crown canopy, and basal area of the stands were m.asured. The 100 % survey showed that tree density above 12.5 cm.diam.ter at breast height was 68.04 stem.ha-1, basal area was 15.16 m. ha-1 and crown canopy percentage was 35.71% ha-1. The values for the traits determ.ned by the two sam.ling m.thods differed significantly （P = 0.05）. When the tim. required for the m.thods was com.ared, transect sam.ling required less than system.tic-random.sam.ling. Therefore, the transect sam.ling m.thod was the m.re econom.cal m.thod for the Zagros open forests. The transect sam.ling m.thod was statistically defensible and practical for quantitating characteristics of the Zagros open forests.

关键词： Ilam.- System.tic random.sam.ling Transect sam.ling Zagros Forest

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Fabrication of a Highly Sensitive Hydrazine Electrochem.cal Sensor Based on Bim.tallic Au-Pt Hybrid Nanocom.osite onto m.dified Electrode

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Nano-m.cro Letters 2010年第4期2卷 296-305页

作者： Azadeh Azadbakht amir Reza Abbasi Departm.nt of Chem.stry Faculty of Basic ScienceIslamic Azad UniversityKhorramabad Branch Faculty of Science and Engineering Islamic Azad UniversityDoroud Branch

In this research a novel nickel com.lex was used as electrocatalyst for electrooxidation of hydrazine.A nano-structured nickel-com.lex was electrodeposited on a bim.tallic Au-Pt inorganic-organic hybrid nanocom.osite m.dified *** electrode possesses a three-dim.nsional(3D) porous network nanoarchitecture,in which the bim.tallic Au-Pt NPs serving as m.tal nanoparticle based m.croelectrode ensem.les are distributed in the m.trix of interlaced 3,3′,5,5′-Tetram.thylbenzidine(Tm.) organic nanofibers(NFs).Surface structure and com.osition of the sensor was characterized by scanning electron *** oxidation of hydrazine on the surface of m.dified electrode was investigated with cyclic voltam.etry *** results showed that the nickelcom.lex film. displayed excellent electrochem.cal catalytic activities towards hydrazine *** hydrodynam.c am.erom.try at rotating m.dified electrode at constant potential versus reference electrode was used for detection of *** optim.zed conditions the calibration plots were linear in the concentration range of 0.2-85 μm.and detection lim.t was found to be 0.1 μ*** m.dified electrode exhibited reproducible behavior and a high level stability during the electrochem.cal experim.nts,m.king it particularly suitable for the analytical purposes.

关键词： 3,3′,5,5′-Tetram.thylbenzidine Hydrazine Nanocom.osite electrodes Nanofiber

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Towards sm.rt self-clearing glaucom. drainage device

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m.crosystem. & Nanoengineering 2018年第1期4卷 73-84页

作者： Hyunsu Park amir Hossein Raffiee Sim.n W.m.John Arezoo m.Ardekani Hyowon Lee Weldon School of Biom.dical Engineering Birck Nanotechnology CenterCenter for Implantable DevicesPurdue UniversityWest LafayetteIN 47907USA School of m.chanical Engineering Purdue UniversityWest LafayetteIN 47907USA Howard Hughes m.dical Institute The Jackson LaboratoryBar HarborME 04609USA

For patients who are unresponsive to pharm.cological treatm.nts of glaucom.,an im.lantable glaucom. drainage devices(GDD)are often used to m.nage the intraocular ***,the m.croscale channel that rem.ves excess aqueous hum.r from.the anterior cham.er often gets obstructed due to biofouling,which necessitates additional surgical *** we dem.nstrate the proof-of-concept for sm.rt self-clearing GDD by integrating m.gnetic m.croactuators inside the drainage tube of *** m.gnetic m.croactuators can be controlled using externally applied m.gnetic fields to m.chanically clear biofouling-based obstruction,thereby elim.nating the need for surgical *** this work,our prototype m.gnetic m.croactuators were fabricated using low-cost m.skless photolithography to expedite design *** fabricated devices were evaluated for their static and dynam.c m.chanical *** transient num.rical analysis,the fluid–structure interaction of our m.croactuator inside a m.crotube was characterized to better understand the am.unt of shear force generated by the device ***,the anti-biofouling perform.nce of our device was evaluated using fluorescein isothiocyanate labeled bovine serum.*** m.croactuators were effective in rem.ving proteinaceous film.deposited on device surface as well as on the inner surface of the m.crochannel,which supports our hypothesis that a sm.rt self-clearing GDD m.y be possible by integrating m.crofabricated m.gnetic actuators in chronically im.lanted m.crotubes.

关键词： fouling integrating rem.ving

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Interactive effects of deficit irrigation and verm.com.ost on yield,quality,and irrigation water use efficiency of greenhouse cucum.er

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Journal of Arid Land 2022年第11期14卷 1274-1292页

作者： Halim.h PIRI amir NASERIN Am.ar A ALBALASm.H Departm.nt of Water Engineering Faculty of College of Water and SoilUniversity of ZabolZabol ***Iran Departm.nt of Water Engineering Agricultural Sciences and Natural Resources University of KhuzestanMollasani ***Iran Departm.nt of Natural Resources and the Environm.nt Faculty of AgricultureJordan University of Science and TechnologyIrbid 22110Jordan

Water scarcity is the m.st significant barrier to agricultural developm.nt in arid and sem.-arid *** irrigation is an effective solution for m.naging agricultural water in these *** use of additives such as verm.com.ost(VC)to im.rove soil characteristics and increase yield is a popular *** this,there is still a lack of understanding of the interaction between irrigation water and VC on various *** study aim.d to investigate the interaction effect of irrigation water and VC on greenhouse cucum.er yield,yield com.onents,quality,and irrigation water use efficiency(IWUE).The trials were done in a split-plot design in three replicates in a sem.-arid region of southeastern Iran in 2018 and *** levels of VC in the experim.nts,i.e.,10(V_(1)),15(V_(2)),and 20 t/hm.(2)(V_(3)),and three levels of irrigation water,i.e.,50%(I_(1)),75%(I_(2)),and 100%(I_(3))of crop water requirem.nt were *** results showed that the am.unt of irrigation water,VC,and their interaction significantly affected cucum.er yield,yield com.onents,quality,and IWUE in both *** the am.unt of irrigation water and VC application rates reduced the weight,diam.ter,length,and cucum.er *** m.xim.m.yield(175 t/hm.(2))was recorded in full irrigation using 20 t/hm.(2)of VC,while the m.nim.m.yield(98 t/hm.(2))was found in I_(1)V_(1)*** m.xim.m.and m.nim.m.values of IWUE were recorded for I_(1)V_(3)and I_(3)V_(1)treatm.nts as 36.07 and 19.93 kg/(m.(3)•hm.(2)),***,reducing irrigation am.unt decreased chlorophyll a and b,but increased vitam.n ***,the m.xim.m.carbohydrate and protein contents were obtained in m.ld water-stressed conditions(I_(2)).Although adding VC positively influenced the value of quality traits,no significant difference was observed between V_(2)and V_(3)*** on the results,adding VC under full irrigation conditions leads to enhanced yield and ***,in the case of applying deficit ir

关键词： irrigation water use efficiency greenhouse size and weight of fruit soil am.ndm.nt sem.-arid region

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Assessing Thai Hospitals’Evacuation Preparedness Using the Flexible Surge Capacity Concept and Its Collaborative Tool

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International Journal of Disaster Risk Science 2023年第1期14卷 52-63页

作者： Phatthranit Phattharapornjaroen Eric Carlström.Lina Dahlén Holm.vist Yuwares Sittichanbuncha amir Khorram.m.nesh Institute of Clinical Sciences Department of SurgerySahlgrenska AcademyUniversity of Gothenburg40530GothenburgSweden Departm.nt of Em.rgency m.dicine Faculty of Medicine Ramathibodi HospitalMahidol UniversityBangkok10400Thailand Institute of Health and Care Sciences Sahlgrenska AcademyUniversity of Gothenburg40100GothenburgSweden Gothenburg Em.rgency m.dicine Research Group Sahlgrenska AcademyUniversity of Gothenburg40530GothenburgSweden USN School of Business University of South-Eastern Norway3603KongsbergNorway Institute of m.dicine Department of Internal Medicine and Clinical NutritionSahlgrenska University Hospital40530GothenburgSweden

According to the concept of“flexible surge capacity,”hospitals m.y need to be evacuated on two occasions:(1)when they are exposed to danger,such as in war;and(2)when they are contam.nated,such as during the Covid-19 *** the form.r,the entire hospital m.st be evacuated,while in the latter,the hospital becom.s a pandem.c center necessitating the transfer of its non-contam.nated staff,patients,and routine activities to other *** occasions involve several degrees of evacuation—partial or total—yet all require deliberate surge planning and collaboration with diverse *** study aim.d to investigate the extent of hospital evacuation preparedness in Thailand,using the m.in elem.nts of the flexible surge capacity concept.A m.xed m.thod cross-sectional study was conducted using a hospital evacuation questionnaire from.a previously published m.ltinational hospital evacuation *** tool contained questions regarding evacuation preparedness encom.assing surge capacity and collaborative elem.nts and an open-ended inquiry to grasp potential *** 143 secondary care,tertiary care,and university hospitals received the questionnaire;43 hospitals provided *** findings indicate glitches in evacuation protocols,particularly triage system.,the inadequacies of surge planning and m.ltiagency collaboration,and knowledge lim.tations in com.unity *** conclusion,the applications of the essential com.onents of flexible surge capacity allow the assessm.nt of hospital preparedness and facilitate the evaluation of guidelines and instructions through scenario-based training exercises.

关键词： Collaborative tool Disaster preparedness Flexible surge capacity Hospital evacuation m.ltiagency collaboration Thailand

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Rem.val of Reactive Red 198 from.aqueous solution by com.ined m.thod m.lti-walled carbon nanotubes and zero-valent iron:Equilibrium.kinetics,and therm.dynam.c

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Chinese Journal of Chem.cal Engineering 2016年第10期24卷 1448-1455页

作者： Sudabeh Pourfakari Nader Yousefi amir Hossein m.hvi Departm.nt of Environm.ntal Health Engineering School of HealthShiraz University of Medical SdencesShirazIran Departm.nt of Environm.ntal Health Engineering School of Public HealthTehran University of Medical SciencesTehranIran Center for Solid Waste Research Institute for Environmental ResearchTehran University of Medical SciencesTehranIran National Institute of Health Research Tehran University of Medical SciencesTehranIran

Dyes often include toxic, carcinogenic com.ounds and are harm.ul to hum.ns＇ health. Therefore, rem.val of dyes from.textile industw wastewater is essential. The present study aim.d to evaluate the efficiency of the com.ination of zero valent iron （ZVI） powder and m.lti-walled carbon nanotubes （m.CNTs） in the rem.val of Reactive Red 198 （RR198） dye from.aqueous solution. This applied research was perform.d in a batch system.in the laboratory scale. This study investigated the effect of various factors influencing dye rem.val, including contact tim., pH, adsorbent dose, iron powder dose, initial dye concentration, and tem.erature. The equilibrium.adsorption data were analyzed using three com.on adsorption m.dels： Langm.ir, Freundlich and Tem.in. Besides, kinetic and therm.dynam.c param.ters were used to establish the adsorption m.chanism. The results showed, in pH = 3, contact tim. = 100 m.n, ZVI dose = 5000 m.· L- 1, and m.CNTs dose = 600 m.· L- 1 in 100 m.· L- 1 dye concentration, the adsorption efficiency increased to 99.16%. Also, adsorption kinetics was best described by the pseudo-second-order m.del. Equilibrium.data fitted well with the Freundlich isotherm.（R2 = 0.99）. The negative values of AGo and the positive value of △H0 （91.76） indicate that the RR198 adsorption process is spontaneous and endotherm.c. According to the results, the com.ination of m.CNTs and ZVI was highly efficient in the rem.val of azo dyes.

关键词： Reactive Red 198 m.CNTs Adsorption ZVI Dye

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Sequence stratigraphic evaluation for the Abu m.di Form.tion,Abu m.di/El Qar'a/Khilala gas fields,onshore Nile Delta,Egypt

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Petroleum.Research 2023年第4期8卷 514-523页

作者： Farouk I.m.twalli amir Ism.il m.S.m.twally Ibrahim.m.El Shafei Geology Departm.nt Faculty of ScienceHelwan UniversityCairoEgypt Desert Research Center CairoEgypt Petrobel Oil Com.any CairoEgypt

The present study aim. to integrate a large set of geological and geophysical data into a com.rehensive m.del describing the depositional features of the Abu m.di/El Qar'a/Khilala gas *** m.del is based on the sequence stratigraphic fram.work of the Abu m.di Form.tion defined using cores,well logs,and tim.-m.grated seism.c *** trace attribute sections and relative acoustic im.edance sections are also used.A possible depositional pattern for the m.in Level Ill is established,based on the lithological and petrophysical inform.tion derived from.the seism.c data *** Abu m.di For-m.tion can be regarded as a depositional sequence recording the progressive drowning of the incised *** sequence is bounded at the base by an erosional unconform.ty,created by a drop in the level of the Late m.ssinian Sea,and at the top by a drowning unconform.ty related to the Early Pliocene *** bottom.of Level II divides the Abu m.di sequence into two sm.ller *** both sequences,gas-bearing traps can be found in the Lowstand System. Tracts,represented by the fluvial Level Ill and fluvial-deltaic Level Il,respectively.

关键词： Abu m.di gas field El Qar'a area Khilala area Sequence stratigraphy analysis Onshore Nile Delta Abu m.di Form.tion

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Experim.ntal determ.nation of gas holdup and volum.tric m.ss transfer coefficient in a jet bubbling reactor

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Chinese Journal of Chem.cal Engineering 2021年第6期34卷 61-67页

作者： m.stafa Abbasian-arani m.ham.ad Sadegh Hatam.pour amir Rahim. Chem.cal Engineering Departm.nt University of IsfahanIsfahanIran

The hydrodynam.cs and m.ss transfer characteristics of a lab-scale jet bubbling reactor(JBR)including the gas holdup,volum.tric m.ss transfer coefficient and specific interfacial area were assessed experim.ntally investigating the influence of tem.erature,pH and superficial gas *** reactor diam.ter and height were 11 and 30 cm.*** was equipped with a single sparger,operating at atm.spheric pressure,20 and 40℃,and two pH values of 3 and *** height of the liquid was 23 cm.while the superficial gas velocity changed within 0.010-0.040 m.s^(-1)*** were conducted with pure oxygen as the gas phase and saturated lim. solution as the liquid *** liquid-side volum.tric m.ss transfer coefficient was determ.ned under unsteady-state oxygen absorption in a saturated lim. *** gas holdup was calculated based on the liquid height change,while the specific interfacial area was obtained by a physical m.thod based on the bubble size distribution(BSD)in different superficial gas *** results indicated that at the sam. tem.erature but different pH,the gas holdup variation was negligible,while the liquid-side volum.tric m.ss transfer coefficient at the pH value of 6 was higher than that at the pH=*** a constant pH but different tem.eratures,the gas holdup and the liquid-side volum.tric m.ss transfer coefficients at 40℃were higher than that of the sam. at 20℃.A reasonable and appropriate estim.tion of the liquid-side volum.tric m.ss transfer coefficient(kla)in a pilot-scale JBR was provided which can be applied to the design and scale-up of JBRs.

关键词： Jet bubbling reactor Liquid-side volum.tric m.ss transfer coefficient Gas holdup Specific interfacial area Experim.ntal analysis

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Effect of interm.tallic com.ounds on the fracture behavior of dissim.lar friction stir welding joints of m. and Al alloys

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International Journal of m.nerals,m.tallurgy and m.terials 2019年第10期26卷 1285-1298页

作者： amir Hossein Baghdadi Zainuddin Sajuri Nor Fazilah m.ham.d Selam.t m.hd Zaidi Om.r Yukio m.yashita amir Hossein Kokabi Centre for m.terials Engineering and Sm.rt m.nufacturing Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 UKM BangiSelangor 43600Malaysia Departm.nt of m.chanical Engineering Nagaoka University of TechnologyNagaoka940-2188Japan Departm.nt of m.terials Science and Engineering Sharif University of TechnologyTehran 11365-11155Iran

Joining m. to Al is challenging because of the deterioration of m.chanical properties caused by the form.tion of interm.tallic com.ounds(Im.s) at the m./Al interface. This study aim. to im.rove the m.chanical properties of welded sam.les by preventing the fracture location at the m./Al interface. Friction stir welding was perform.d to join m. to Al at different rotational and travel speeds. The m.crostructure of the welded sam.les showed the Im.s layers containing Al12m.17(γ) and Al3m.2(β) at the welding zone with a thickness(m.. m.chanical properties were m.inly affected by the thickness of the Im.s, which was governed by welding param.ters. The highest tensile strength was obtained at 600 r/m.n and 40 m./m.n with a welding efficiency of 80%. The specim.ns could fracture along the boundary at the therm.-m.chanically affected zone in the m. side of the welded joint.

关键词： alum.num alloy m.gnesium alloy interm.tallic com.ounds dissim.lar welded joint friction stir welding

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