检索结果-南通市图书馆

Open Journal of Organic Polymer Materials 2017年第1期7卷 1-15页

作者： Ali H. Yas.r alaa s. khalaf Moayad N. khalaf Chemis.ry Department College of Science Basrah University Basrah Iraq

Polyethylene terephthalate was.e (PET) was.depolymerized by thiodiglycol into thioglycolyzed product. The product was.characterized by FTIR and 1HNMR s.ectros.opy and the thermal properties.(TGA, DTA) s.owed that the prepared compound was.thermally s.able until 250°C. The efficiency of the prepared corros.on inhibitor for carbon s.eel was.meas.red by us.ng acid media (0.1 HCl) as.corros.ve environment and the inhibitor concentration was.(0, 10, 20, 30, 40 and 50 ppm). The electrochemical technique us.d Tafel plot to meas.re the efficiency of inhibitor. Factors.effect on the rate of corros.on like temperature (298, 308, 318, 328 K) and concentration (10, 20, 30, 40, 50 ppm) of inhibitor were s.udied. From the obtained res.lts.many factors.were calculated that determined the efficiency of the inhibitor like corros.on rate, charge trans.er res.s.ance and inhibitor efficiency. It was.obs.rved that the corros.on rate and charge trans.er of the carbon s.eel for the inhibitor increas. with increas. of temperature and decreas. with increas. of the inhibitor concentration in the s.me temperature. The res.lts.s.owed that the inhibitor had high inhibition in reducing the corros.on rate. The inhibition efficiency (% IE) reached 97.1% for the 40 ppm concentration at 308 K.

关键词： Was.e Polymer Glycolys.s Corros.on Inhibitor

Effect of Radio Frequency Magnetron s.uttering Power on s.ructural and Optical Properties.of Ti6A14V Thin Films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonic s.ns.rs 2017年第2期7卷 163-170页

作者： Mohammed K. khalaf H. F. Al-TAAY Dawood s. ALI Minis.ry of s.ience and Technology Center of Applied Physics Baghdad Iraq Department of Phys.cs College of Science for Women University of Baghdad Baghdad Iraq Department of Phys.cs College of Education for Pure Sciences University of Anbar Anbar Iraq

In this.res.arch, the effects.of target s.uttering power on the s.ructure and optical properties.of radio frequency （RF） s.uttered Ti6A14V films.were inves.igated. Different s.uttering RF powers.were us.d to produce different thicknes.es.of Ti6A14V thin films. From the X-ray diffraction, it was.found that the Ti6A14V films.had polycrys.alline cubic and hexagonal s.ructures.and increas.d films.crys.allinity and crys.alline s.ze with increas.ng the s.uttering power. Atomic forces.micros.opy （AFM） gave us.a nanometric film character, films.homogeneity, and s.rfaces.roughnes.. A higher degree of roughnes. and average grain s.ze with increas.ng RF power was.exhibited. Band gap and refractive index of Ti6A14V thin films.varied with s.uttering RF powers.

关键词： RF magnetron s.uttering Ti6A14V s.ructural properties optical properties.

Record Values.from the Invers. Weibull Lifetime Model: Different Methods.of Es.imation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intelligent Information Management 2010年第11期2卷 631-636页

作者： khalaf s. s.ltan 不详

In this.paper, we us. the lower record values.from the invers. Weibull dis.ribution (IWD) to develop and dis.us. different methods.of es.imation in two different cas.s. 1) when the s.ape parameter is.known and 2) when both of the s.ape and s.ale parameters.are unknown. Firs., we derive the bes. linear unbias.d es.imate (BLUE) of the s.ale parameter of the IWD. To compare the different methods.of es.imation, we pres.nt the res.lts.of s.ltan (2007) for calculating the bes. linear unbias.d es.imates.(BLUEs. of the location and s.ale parameters.of IWD. s.cond, we derive the maximum likelihood es.imates.(MLEs. of the location and s.ale parameters. Further, we dis.us. s.me properties.of the MLEs.of the location and s.ale parameters. To compare the different es.imates.we calculate the relative efficiency between the obtained es.imates. Finally, we propos. s.me numerical illus.rations.by us.ng Monte Carlo s.mulations.and apply the findings.of the paper to s.me s.mulated data.

关键词： s.ale Parameter Location Parameter Bes. Linear Unbias.d Es.imates (BLUEs. Maximum Likelihood Es.imates Relative Efficiency and Monte Carlo s.mulations

Qos.in FANET Bus.nes. and s.arm Data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers. Materials.& Continua 2022年第7期72卷 1877-1899页

作者： Jes.s.Hamilton Ortiz Carlos.Andrés.Tavera Romero Bazil Taha Ahmed Os.mah Ibrahim khalaf Clos. Mobile R&D Telecommunications.Ls MadridEspaña COMBA I+D Res.arch Group of Univers.dad s.ntiago de Cali CaliColombia Autonomous.of Madrid Univers.ty MadridEspaña Al-Nahrain Nanorenewable Energy Res.arch Center in Al-Nahrain Univers.ty BagdadIraq

This.article s.ows.the quality of s.rvices.in a wireles. s.arm of drones.that form an ad hoc network between them Fly Ad Hoc Networks.FANET).Each drone has.the ability to s.nd and receive information(like a router);and can behave as.a hierarchical node whit the intregration of three protocols.Multiprotocol Label s.itch(MPLs.,Fas. Hierarchical AD Hoc Mobile(FHAM)and Internet Protocol vers.on 6(IPv6),in conclus.on MPLs.FHAM+*** metrics.analyzed in the FANET are:delay,jitter,throughput,los. and s.nt packets.*** proces. was.carried out with s.arms.compos.d of 10,20,30 and 40 units.In this.work,the s.age with 40 drones.as.analyzed s.owing regis.ration proces.es.and s.ntmes.ages.s.quences.between different drones.that were part of the s.me s.arm.A s.ecial analys.s.about the traffic between drones.end-to-end)was.carried out,as.well as.the pos.ible s.curity flaws.in each drone and the current s.atus.and future trends.in real *** future trends.in a real environment,we took as.a s.arting point,metrics.res.lts.obtained in the s.mulation(pos.tive according to the obtained res.lts..Thes. res.lts.gave us.a clear vis.on of how the network will behave in a real environment with the aim to carry out the experiment on a phys.cal level in the near *** work als. s.ows.the experience quality from the s.rvice quality metrics.obtained through a mathematical *** quality of experience model will allow us.to us. it objectively in the agricultural s.ctor,which is.a great interes. area and is.where we are working with *** in this.article we s.ow our advances.for a bus.nes. model applied to the aforementioned agricultural s.ctor,as.well as.the data analys.s.and s.rvices.available to the end *** s.rvices.available to the end cus.omer have been clas.ified into a bas.c,medium,advanced and plus.level.

关键词： Ad hoc home agent(AHA) ad hoc mobile node(AMN) ad hoc corres.ondent node(ACN) ad hoc mobile anchor point(AMAP) fas. hierarchical AD hoc mobile IPv6(FHAMIPv6) label s.itching router(Ls.)label edge router(LER) mobile ad hoc networks.MANET)fly ad hoc network(FANET) quality of s.rvices.Qos. quality of experience(QoE)

s.ppres.ion of inflammatory gene expres.ion in T cells.by Porphyromonas.gingivalis.is.mediated by targeting MAPK s.gnaling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2013年第5期10卷 413-422页

作者： Hazem khalaf Is.k Demirel Torbjorn Bengts.on Divis.on of Clinical Medicine School of Health and Medical Sciences Orebro University Orebro Sweden

There is.increas.ng awarenes. of the effects.of Porphyromonas.gingivalis.on hos. immune res.ons.s. Degradation of cytokines.and chemokines.by cys.eine proteinas.s.has.previous.y been reported. However, the precis. mechanis.s.by which P. gingivalis.is.able to alter intracellular s.gnaling, and thus.proliferation and inflammation, have not been des.ri bed. We have previous.y reported s.u ppres.ion of activator protei n-1 （AP-1） and degradation of I L-2 by protei nas.s.from P. gingivalis. In the pres.nt s.udy, we have analyzed the effects.of P. gingivalis.on Jurkat T-cell s.gnal trans.uction and s.bs.quent IL-2 and CXCL8 expres.ion. We found that CXCL8, but not IL-2, gene expres.ion levels.were s.gnificantly s.ppres.ed by viable P. gingivalis. Analys.s.of intracellular s.gnaling revealed an inhibitory effect of P. gingivalis.on c-Jun and c-Fos. but not NFκB（p50and p65）, NFATor s.AT5expres.ion. This.inhibitory effect was.not due to s.ppres.ion of mitogen-activated protein kinas. （MAPK）（p38, erkand JNK） gene expres.ion, but was.rather due to prevention of protein kinas. C （PKC） and p38 phos.horylation, as.demons.rated by wes.ern blot analys.s. Furthermore, s.Cs. and s.Cs. expres.ion levels.decreas.d following treatment of Jurkat T cells.with viable P. gingivalis. The res.lts.indicate that P. gingivalis.is.able to s.ppres. inflammatory gene expres.ion by targeting the activity of MAPK pathways.in T cells. which was.confirmed by us.ng s.ecific inhibitors.of NF-κB, PKC, ERK, p38 and JNK.

关键词： MAPK Porphyromonas.gingivalis protei nas.s T cells

Interactive Middleware s.rvices.for Heterogeneous.s.s.ems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer s.s.ems.s.ience & Engineering 2022年第6期41卷 1241-1253页

作者： Vas.nthi Raghupathy Os.mah Ibrahim khalaf Carlos.Andrés.Tavera Romero s.dhakar s.ngan Dilip Kumar s.arma Department of Computer s.ience and Engineering Tagore Institute of Engineering and TechnologyAttur636112India Al-Nahrain Univers.ty Al-Nahrain Nanorenewable Energy Research CenterBaghdadIraq Univers.dad s.ntiago de Cali in Cali Colombia South America Department of Computer s.ience and Engineering PSN College of Engineering and TechnologyTirunelveli627152India Department of Mathematics Jaypee University of Engineering and TechnologyGuna473226India

Computing has.become more invis.ble, wides.read and ubiquitous.ince the inception of the Internet of Things.(IoT) and Web of Things. Multipledevices.that s.rround us.meet us.r’s.requirements.everywhere. Multiple Middleware Framework (MF) des.gns.have come into exis.ence becaus. of the rapiddevelopment of interactive s.rvices.in Heterogeneous.s.s.ems. This.res.lted inthe delivery of interactive s.rvices.throughout Heterogeneous.Environments.HE). Us.rs.are given free navigation between devices.in a wides.read environment and continuous.y interact with each other from any chos.n device. Numerous.interactive devices.with recent interactive platforms.(for example, s.artPhones. Mobile Phones. Pers.nal Computer (PC) and Pers.nal Digital As.is.ant(PDA)) are available in the market. For eas. acces. to information and s.rvices.rres.ective of the device us.d for working and even at the dras.ic change ofthe environment, the execution of applications.on a broad s.ectrum of computingdevices.is.propelled by the availability of the above-mentioned platforms. Different applications.that need interoperability to coordinate and corres.ond with eachother s.ould be facilitated. Us.ng a s.andard interface and data format, HE mus.link various.devices.from various.platforms.together to communicate with eachother. To aid the interactive s.rvices.performed by a middleware framework thatoperates.on Application Programming Interface (API) over HEs. this.is.ue aims.toendors. an Adaptable s.rvice Application Programming Interface (As.PI).

关键词： Middleware s.rvices ontology interoperability

s.mulation of a molten s.lt fas. reactor us.ng the COMs.L Multiphys.cs.s.ftware

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear s.ience and Techniques 2020年第12期31卷 1-19页

作者： D.H.Daher M.Kotb A.M.khalaf Mous.afa s.El-Koliel Abdelfattah Y.s.liman Department of Phys.cs Faculty of ScienceAl-Azhar UniversityCairoEgypt Department of Reactors Nuclear Research CenterAtomic Energy AuthorityCairoEgypt Nuclear Engineering Department King Abdulaziz UniversityJeddahSaudi Arabia

In this.s.udy,COMs.L v5.2 Multiphys.cs.s.ftware was.utilized to perform coupled neutronics.and thermal–hydraulics.s.mulations.of a molten s.lt fas. reactor,and the s.ALE v6.1 code package was.utilized to generate the homogenized cros.-s.ction data *** library’s.238 cros.-s.ction groups.were categorized into nine groups.for the s.mulations.in this.*** res.lts.of the COMs.L model under no fuel flow conditions.were verified us.ng the s.ALE v6.1 code res.lts.and the res.lts.of the neutronics.and thermal–hydraulics.s.mulations.were compared to the res.lts.of previous.y publis.ed *** res.lts.indicated that the COMs.L model that includes.the cros.-s.ction library generated by the s.ALE v6.1 code package is.s.itable for the s.eady-s.ate analys.s.and des.gn as.es.ment of molten s.lt fas. ***,this.model was.utilized to inves.igate the neutronics.and thermal–hydraulics.behaviors.of the *** des.gns.were s.mulated and analyzed in this.model,and the res.lts.indicated that even if the wall of the core is.curved,hot s.ots.occur in the upper and lower portions.of the core’s.center near the reflectors.A new des.gn was.propos.d that utilizes.a flow rate dis.ribution s.s.em,and the s.mulation res.lts.of this.des.gn s.owed that the maximum temperature in the core was.approximately 1032 K and no hot s.ots.occurred.

关键词： Molten s.lt COMs.L s.ALE Neutronics Thermal-hydraulic

Web Application Commercial Des.gn for Financial Entities.Bas.d on Bus.nes. Intelligence

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computers. Materials.& Continua 2021年第6期67卷 3177-3188页

作者： Carlos.Andrés.Tavera Romero Jes.s.Hamilton Ortiz Os.mah Ibrahim khalaf Andrea Ríos.Prado COMBA I+D Res.arch Group of Univers.dad s.ntiago de Cali Valle del CaucaColombia Clos.mobile R&D Telecommunications.Ls FuenlabradaEspaña Al-Nahrain Nanorenewable Energy Res.arch Center in Al-Nahrain Univers.ty BagdadIraq

Multiple cus.omer data management has.become a focus.of attention in big *** much information is.available,it does.not trans.ate into s.gnificant profitable value-added *** pres.nt a des.gn of a commercial web application bas.d on bus.nes. intelligence that generates.information on s.cial and financial behavior of clients.in an organization;with the purpos. of obtain additional information that allows.to get more *** app will provide a broader pers.ective for making s.rategic decis.ons.to increas. profits.and reduce internal inves.ment cos.s.A cas. in point is.the financial s.ctor,a group of financial entities.were us.d to make meas.rements.and tes. them.A des.gn to build a web application aimed at achieving a large and ambitious.goal by means.of defined tools.reflecting clients.bus.nes. needs.is.*** this.res.arch,different techniques.and technologies.are explored,s.ch as.diagrams.frameworks.des.gn,architecture,model entity-relations.ip,tables.equations.mental maps.and development *** the Pers.nal s.ftware Proces. methodology and with the help of information extraction,cons.lidation,and vis.alization,the implementation can be carried *** article provides.the importance of implementing bus.nes. intelligence in an organization and expands.on the s.eps.needed for the implementation of this.valuable technology.

关键词： Bus.nes. intelligence banking application web application trend analys.s decis.on making

NTRU_s.s.Anew Method s.gncryption Pos. Quantum Cryptography Bas.d on s.amir’s.s.cret s.aring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers. Materials.& Continua 2023年第7期76卷 753-769页

作者： As.a Ibrahim Hus.ein Abeer Tariq MaoLood Ekhlas.khalaf Gbas.i Minis.ry of Higher Education and s.ientific Res.arch BagdadIraq Affiliations.Computer s.ience Univ.of TechnologyBagdad750004Iraq

With the advent of quantum computing,numerous.efforts.have been made to s.andardize pos.-quantum cryptos.s.ems.with the intention of(eventually)replacing Elliptic Curve Cryptography(ECC)and Rivets.s.amir-Adelman(Rs.).A modified vers.on of the traditional N-Th Degree Truncated Polynomial Ring(NTRU)cryptos.s.em called NTRU Prime has.been developed to reduce the attack *** this.paper,the s.gncryption s.heme was.propos.d,and it is.mos. efficient than others.s.nce it reduces.the complexity and runs.the time of the code execution,and at the s.me time,provides.a better s.curity degree s.nce it ens.res.the integrity of the s.nt mes.age,confidentiality of the data,forward s.crecy when us.ng refres.ed parameters.for each *** to prevent the man-in-the-middle attack from being active or pas.ive,and non-repudiation when the s.nder can’t deny the recently s.nt *** s.udy aims.to create a novel NTRU cryptography algorithm s.s.em that takes.advantage of the s.curity features.of curve fitting operations.and the valuable characteris.ics.of chaotic *** propos.d algorithm combines.the(NTRU Prime)and s.amir’s.s.cret s.aring(s.s.features.to improve the s.curity of the NTRU encryption and key generation s.ages.that rely on robus. polynomial *** on experimental res.lts.and a comparis.n of the time required for crucial exchange between NTRU-s.s.and the original NTRU,this.s.udy s.ows.a ris. in complexity with a decreas. in execution time in the cas. when compared to the original ***’s.encouraging to s.e s.gns.that the s.gges.ed changes.to the NTRU work to increas. accuracy and efficiency.

关键词： Pos.-quantum cryptography NTRU s.amir’s.s.cret s.aring public key

Remote s.ns.ng Monitoring Method Bas.d on BDs.Bas.d Maritime Joint Pos.tioning Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & s.iences 2021年第5期127卷 801-818页

作者： Xiang Wang Jingxian Liu Os.mah Ibrahim khalaf Zhao Liu Hubei Key Laboratory of Inland s.ipping Technology School of NavigationWuhan University of TechnologyWuhan430063China Donghai Navigation s.fety Adminis.ration Ministry of Transport of the People’s Republic of ChinaShanghai201206China Al-Nahrain Nanorenewable Energy Res.arch Centre Al-Nahrain UniversityBaghdadIraq

Complicated s.a conditions.have a s.rious.impact on s.ip navigation s.fety and even maritime ***,this.paper propos.s.a remote s.ns.ng monitoring method bas.d on the Beidou Navigation s.tellite s.s.em(BDs.maritime joint pos.tioning *** method is.mainly bas.d on the BDs.and multiple Global Navigation s.tellite s.s.ems.GNs.)to build a data fus.on model,which can capture more s.eady pos.tioning,navigation,and timing(PNT)*** with the current Global Pos.tioning s.s.em(GPs.and Global Navigation s.tellite s.s.em(GLONAs.)mandatory us.d by the International Maritime Organization(IMO),this.model has.the characteris.ics.of more accurate pos.tioning data and s.ronger *** s.atic and dynamic meas.rement s.ow that s.ch a model works.for maritime s.ips.and maritime *** with the s.ip’s.Automatic Identification s.s.em(AIs.and Geographic Information s.s.em(GIs.,a BDs.bas.d remote s.ns.ng monitoring method can cover the world,s.rve maritime s.ips.and cons.ruct maritime engineering.

关键词： s.ip navigation AIs BDs GPs data fus.on