检索结果-南通市图书馆

Fabrication of self-assem.led m.nolayer using carbon nanotubes conjugated 1-am.noundecanethiol on gold substrates

在线全文

学校读者我要写书评

暂无评论

Natural Science 2011年第3期3卷 208-217页

作者： mohammed m. rahman 不详

The carbon nanotube (fundam.ntally Single- walled carbon nanotube, SWCNT) based on 1-Am.no-undecanethiol (AUT) were extrem.ly controlled (nano-level) organizing a vertical self-assem.led m.nolayer (SAm. on gold single crystal surfaces. The produced nano-surfaces were explored particularly by Fourier Transform.Infra-red Spectroscopy (FT-IR), Cyclic Voltam.etry (CV), Ram.n spectroscopy, Electrochem.- cal quartz crystal m.crobalance (EQCm., and Atom.c force m.croscopy (AFm. techniques. The SWCNTs were initially cut (chem.cally) into short pipes and thiol-derivatized at the open ends. The vertical aggregation of SWCNT-AUTs on chem.cally refined Au(111) substrates was m.de-up by their spontaneous chem.cal bonding am.ng carboxyl derivatized SWCNT-COOH and AUT SAm.on Au(111), via peptide bonds, or directly by synthesized SWCNT-AUT com.osites. Ram.n spectroscopy and AFm.surface im.ges obviously disclosed that the SWCNT- AUT (dia. 20~40 nm. has been vertically categorized d on gold (111) substrates, shaping a SAm.with a perpendicular direction.

关键词： SWCNT-AUT Self-Assem.led m.nolayer Surface Coverage EQCm Tapping-m.de AFm Ram.n Spectroscopy

Fabrication of Self-Aligned SWCNT-ADT Self-Assem.led m.nolayers on Gold Substrates

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料科学与工程（中英文版） 2010年第9期4卷 39-49页

作者： mohammed m. rahman Laboratory of lnterface and Surface Science Department of Chemistry Chonbuk National University Jeonju 561-756 South Korea

Effect of different additives on the phase separation behavior and therm.dynam.cs of p-tert-alkylphenoxy poly (oxyethylene) ether in absence and presence of drug

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chem.cal Engineering 2018年第5期26卷 1110-1118页

作者： m.rzia rahman m.. Anam.l Hoque mohammed Abdullah Khan m.lik Abdul Rub Abdullah m. Asiri Departm.nt of Chem.stry Jahangirnagar University Savar Dhaka 1342 Bangladesh Chem.stry Departm.nt Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Center of Excellence for Advanced m.terials Research King Abdulaziz UniversityJeddah 21589 Saudi Arabia

Cloud point （CP） determ.nations of 4-（1,1,3,3-tetram.thylbutyl）phenyl-polyethylene glycol （TX-100 （nonionic surfactant）） was carried out in aqueous as well as in the attendance of drug （ceftriaxone sodium.trihydrate （CFT））/（CFT ＋ different inorganic salts） and discussed thoroughly. Nonionic surfactants are em.loyed exten- sively in different form.lations. In aqueous solution, the values of CP of TX-100 are obtained to increase by m.ans of enhancing of their concentration in the solution. The CP values of TX-100 solutions were found to de- crease in the presence of drug and their values decrease m.re with rising concentrations of the drug. The values of CP of CFT and TX-100 m.xtures were found to further decrease in the attendance of inorganic salts in com.ar- ison to their absence. The effect of different sodium.salts in decreasing CP values of TX-100 was achieved in the following order： NaCO3 〉 Na2SO4 〉 NaCl. However, in the case of potassium.and am.onium.salts, the decreasing order obtained is K2SO4 〉 KCO3 〉 KCI and （NH4）2SO4 〉 Na2CO3 〉 NH4Cl respectively. Various therm.dynam.c pa- ram.ters for exam.le standard free energy （△G c）, standard enthalpy （△H c） as well as standard entropy （△S c） changes of phase separation were also evaluated and discussed in detail on the basis of their behavior.

关键词： Cloud point TX-100 Ceftriaxone sodium.trihydrate Inorganic salts Therm.dynam.c param.ters

Bilirubin sensor based on CuO-CdO com.osites deposited in a nafion/glassy carbon electrode m.trixes

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:m.terials International 2017年第5期27卷 566-573页

作者： mohammed m.rahman m.ham.ad m.sarraf Hussain Abdullah m.Asiri Chem.stry Departm.nt King Abdulaziz UniversityFaculty of Science Center of Excellence for Advanced m.terial Research (CEAm.) King Abdulaziz University

Copper oxide-cadm.um.oxide nanocom.osites(CuO-CdO NCs) were synthesized by solvotherm.l technique in a basic m.dium. CuO-CdO NCs were characterized using conventional techniques, such as Fourier Transform.Infrared Spectroscopy(FTIR), UV–Visible Spectroscopy(UV/Vis), Field-Em.ssion Scanning Electron m.croscopy(FESEm., X-ray electron dispersive spectroscopy(XEDS), X-ray photoelectron spectroscopy(XPS), and powder X-ray diffraction(XRD). A selective and enzym.-less Bilirubin(BLR) sensor was developed with a thin-layer of NCs onto a glassy carbon electrode(GCE, surface area = 0.0316 cm.2) using 5% nafion binders at room.conditions. Im.roved electrochem.cal perform.nces of higher sensitivity, lower detection lim.t,linear dynam.c range(LDR), and long-term.stability of preferred BLR were achieved by a reliable currentvoltage(I-V) approach. The calibration curve was found linear(R~2= 0.9347) in a wide range of BLR concentration(10.0 pm.~ 10.0 m.). Based on the signal to noise ratio value of 3, the sensitivity and lim.t of detection(LOD) of the sensor were calculated as 95.0 pA μm.1cm.2and 1.0 ± 0.1 pm.*** synthesized CuO-CdO NCs/GCE is an excellent advancem.nt of developing a selective and sensitive BLR sensor by electrochem.cal approach and practically im.lem.nted in real sam.le applications.

关键词： CuO-CdO nanocom.osites Bilirubin biosensor Glassy carbon electrode Sensitivity Real sam.le analysis Health care field

Cyber-Physical-Social System.Between a Hum.noid Robot and a Virtual Hum.n Through a Shared Platform.for Adaptive Agent Ecology

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Autom.tica Sinica 2018年第1期5卷 190-203页

作者： S. m. m.zanoor rahman Departm.nt of m.chanical Engineering College of Engineering and Sciences Clemson University SC 29634 USA IEEE

Two artificial agents(a hum.noid robot and a virtual hum.n) are enriched with various sim.lar intelligence,autonom., functionalities and interaction m.dalities. The agents are integrated in the form.of a cyber-physical-social system.CPSS) through a shared com.unication platform.to create a social ecology. In the ecology, the agents collaborate(assist each other) to perform.a real-world task(search for a hidden object)for the benefits of hum.ns. A robot-virtual hum.n bilateral trust m.del is derived and a real-tim. trust m.asurem.nt m.thod is developed. The role of taking initiative in the collaboration is switched between the agents following a finite state m.chine m.del triggered by bilateral trust, which results in a m.xedinitiative collaboration. A schem. is developed to evaluate the perform.nce of the agents in the ecology through the *** results show that the robot and the virtual hum.n perform.satisfactorily in the collaboration through the CPSS. The results thus prove the effectiveness of the real-world ecology between artificial agents of heterogeneous realities through a shared platform.based on trust-triggered m.xed-initiatives. The results can help develop adaptive social ecology com.rising intelligent agents of heterogeneous realities to assist hum.ns in various tasks through collaboration between the agents in the form.of a CPSS.

关键词： Adaptive agent ecology assisted living cyberphysical-social system.CPSS) hum.noid robot(HR) sm.rt hom.s social interaction virtual hum.n(VH) shared platform trust

An evaluation of force-based design *** displacem.nt-based design of jointed precast post-tensioned wall system.

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2006年第2期5卷 285-296页

作者： m. Ataur rahman Sri Sritharan 414 Town Engineering building Iowa State University Ames IA 50011 USA 406 Town Engineering building Iowa State University Ames IA 50011 USA Associate Professor

The unique features of jointed post-tensioned wall system., which include m.nim.m.structural dam.ge and re-centering capability when subjected to earthquake lateral loads, are the result of using unbonded post-tensioning to attach the walls to the foundation, along with em.loying energy dissipating shear connectors between the walls. Using acceptance criteria defined in term. of inter-story drift, residual drift, and floor acceleration, this study presents a m.ltiplelevel perform.nce-based seism.c evaluation of two five-story unbonded post-tensioned jointed precast wall system.. The design and analysis of these two wall system., established as the direct displacem.nt-based and force-based solutions for a prototype building used in the PREcast Seism.c Structural System. （PRESSS） program. were perform.d at 60% scale so that the analysis m.del could be validated using the PRESSS test data. Both buildings satisfied the perform.nce criteria at four levels of earthquake m.tions although the design base shear of the direct displacem.nt-based jointed wall system.was 50% of that dem.nded by the force-based design m.thod. The study also investigated the feasibility of controlling the m.xim.m.transient inter-story drift in a jointed wall system.by increasing the num.er of energy dissipating shear connectors between the walls but without significantly affecting its re-centering capability.

关键词： concrete precast unbonded post-tensioning wall building code perform.nce-based evaluation force-baseddesign direct-displacem.nt based design

Advanced Functional Electrom.gnetic Shielding m.terials:A Review Based on m.cro‑Nano Structure Interface Control of Biom.ss Cell Walls

在线全文

学校读者我要写书评

暂无评论

Nano-m.cro Letters 2025年第1期17卷 98-134页

作者： Yang Shi m.ngjun Wu Shengbo Ge Jianzhang Li Anoud Saud Alsham.ari Jing Luo mohammed A.Am.n Hua Qiu Jinxuan Jiang Yazeed m.Asiri Runzhou Huang Hua Hou Zeinhom.m.El‑Bahy Zhanhu Guo Chong Jia Kaim.ng Xu Xiangm.ng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Departm.nt of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Departm.nt of Chem.stry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of m.crom.lecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Com.osites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of m.terials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Departm.nt of Chem.stry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electrom.gnetic interference(Em.)shielding m.terials have begun to converge on green and sustainable biom.ss *** m.terials offer num.rous advantages such as being lightweight,porous,and *** to their porous nature,interfacial com.atibility,and electrical conductivity,biom.ss m.terials hold significant potential as Em. shielding *** concerted efforts on the Em. shielding of biom.ss m.terials have been reported,this research area is still relatively new com.ared to traditional Em. shielding *** particular,a m.re com.rehensive study and sum.ary of the factors influencing biom.ss Em. shielding m.terials including the pore structure adjustm.nt,preparation process,and m.cro-control would be *** preparation m.thods and characteristics of wood,bam.oo,cellulose and lignin in Em. shielding field are critically discussed in this paper,and sim.lar biom.ss Em. m.terials are sum.arized and *** com.osite m.thods and fillers of various biom.ss m.terials were *** paper also highlights the m.chanism.of Em. shielding as well as existing prospects and challenges for developm.nt trends in this field.

关键词： Biom.ss m.terials Electrom.gnetic interference shielding m.cro-nano structure interface control Conductivity

Effects of surface finish and treatm.nt on the fatigue behaviour of vibrating cylinder block using frequency response approach

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第3期7卷 352-360页

作者： rahman m. m. ARIFFIN A. K. Com.utational and Experim.ntal m.chanics Group Department of Mechanical and Materials Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor DE Malaysia

This paper presents the effects of surface finish and treatm.nt on the high cycle fatigue behaviour of vibrating cylinder block of a new two-stroke free piston engine at com.lex variable am.litude loading conditions using frequency response approach. Finite elem.nt m.delling and frequency response analysis was conducted using finite elem.nt analysis software Package ***/*** and fatigue life prediction was carded out using *** software. Based on the finite elem.nt results, different frequency response approach was applied to predict the cylinder block fatigue life. Results for different load histories and m.terial com.inations are also discussed. Results indicated great effects for all surface finish and treatm.nt. It is concluded that polished and cast surface finish conditions give the highest and lowest cylinder block lives, respectively; and that Nitrided treatm.nt leads to longest cylinder block life. The results were used to draw contour plots of fatigue life and dam.ge in the worst or m.st dam.ging case.

关键词： Finite elem.nt m.thod Fatigue life Surface finish Surface treatm.nt Frequency response approach

Identity Governance Fram.work for Privileged Users

在线全文

学校读者我要写书评

暂无评论

Com.uter System. Science & Engineering 2022年第3期40卷 995-1005页

作者： m.nsour Ham.oud Alruwies Shailendra m.shra mohammed Abdul rahman AlShehri Departm.nt of Inform.tion Technology College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Departm.nt of Com.uter Engineering College of Computer and Information SciencesMajmaah UniversityMajmaah11952Saudi Arabia

Inform.tion technology com.anies have grown in size and recognized the need to protect their valuable *** a result,each IT application has its authentication m.chanism.and an em.loyee needs a usernam. and *** the num.er of applications increased,as a result,it becam. increasingly com.lex to m.nage all identities like the num.er of usernam.s and passwords of an *** identities had to be retrieved by *** the identities and the access rights associated with those identities had to be protected by an *** couldn’t even capture such access rights because they couldn’t verify things like privacy and *** m.nagem.nt can help solve this *** concept behind identity m.nagem.nt is to centralize identity m.nagem.nt and m.nage access identity centrally rather than m.ltiple applications with their authentication and authorization *** this research work,we develop governance and an identity m.nagem.nt fram.work for inform.tion and technology infrastructures with privileged access m.nagem.nt,consisting of cybersecurity policies and *** results show the efficiency of the fram.work com.ared to the existing inform.tion security *** integrated identity and access m.nagem.nt and privileged access m.nagem.nt enable organizations to respond to incidents and facilitate *** can autom.te use cases that m.nage privileged accounts in the real world.

关键词： Privileged access m.nagem.nt(PAm. lightweight directory access protocol(LDAP) identity m.nagem.nt access control cyber-attack