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侧向加压充填技术和垂直加压充填技术对根管微渗漏影响的对比研究(英文)

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口腔医学研究 2007年第5期23卷 529-532页

作者： sahibzada mohammad noor Department of Stomatology Xiangya HospitalCentral South University

目的:首次采用葡萄糖渗漏模型(GPM)对比研究在有根充糊剂和没有根充糊剂的情况下垂直加压充填技术和侧向加压充填技术对根管微渗漏的影响。方法:选取53颗直根管上前牙,根管预备后随机分为5组,A组(14颗)用热牙胶垂直加压加AHPlus充填,B... 详细信息

目的:首次采用葡萄糖渗漏模型(GPM)对比研究在有根充糊剂和没有根充糊剂的情况下垂直加压充填技术和侧向加压充填技术对根管微渗漏的影响。方法:选取53颗直根管上前牙,根管预备后随机分为5组,A组(14颗)用热牙胶垂直加压加AHPlus充填,B组(8颗)仅用热牙胶垂直加压充填,C组(13颗)用侧方加压加AHPlus充填,D组(8颗)仅用侧方加压充填技术,E组10颗)为阴性对照组,用粘蜡充填根管,牙根外表面及根尖孔处涂二层指甲油。于第7、14、21、28天用葡萄糖氧化酶法检测从冠方向根方漏出的葡萄糖量。结果:采用重复测量方差分析,发现第7、14、21、28天A、C组微渗漏值有显著性差异(P0.05),但各组第14天与第21天比有显著性差异(P<0.05)。结论:侧方加压充填技术封闭根管的能力优于垂直加压充填技术及固核载体充填技术,而后两种充填技术封闭根管的能力相当。

关键词：侧方加压充填垂直加压充填根管治疗葡萄糖渗漏模型根尖微渗漏

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三种充填技术根管封闭能力的研究

临床口腔医学杂志 2007年第11期23卷 680-682页

作者：谢晓莉 sahibzada mohammad noor 殷凌云刘柳慧陈敏慜中南大学湘雅医院口腔科湖南长沙410008

目的:利用葡萄糖定量法检测根管微渗漏模型,评价侧向加压充填技术、垂直加压充填技术及固核载体充填技术对根管微渗漏的影响。方法:选取71颗直根管上前牙,根管预备后随机分为7组,A组(14颗)用热牙胶垂直加压加AH Plus充填;B组(8颗)仅用... 详细信息

目的:利用葡萄糖定量法检测根管微渗漏模型,评价侧向加压充填技术、垂直加压充填技术及固核载体充填技术对根管微渗漏的影响。方法:选取71颗直根管上前牙,根管预备后随机分为7组,A组(14颗)用热牙胶垂直加压加AH Plus充填;B组(8颗)仅用热牙胶垂直加压充填;C组(13颗)用侧方加压加AH Plus充填;D组(8颗)仅用侧方加压充填技术;E组(11颗)用Thermafil加AH Plus充填;F组(7颗)仅用Thermafil充填;G组(10颗)为阴性对照组,用粘蜡充填根管。牙根外表面、根管口及根尖孔处涂二层指甲油。于第7d、14d、21d、28d用葡萄糖氧化酶法检测从冠方向根方漏出的葡萄糖量。结果:采用重复测量方差分析,发现第7d、14d、21d、28dA、C组及C、E组微渗漏值有显著性差异(P0.05)。各时间点C、D组比较有显著性差异(P0.05)。第7d、14d及第21d、28d各组内比较无显著性差异(P>0.05),但各组第14d与第21d比较有显著性差异(P<0.05)。结论:侧方加压充填技术封闭根管的能力优于垂直加压充填技术及固核载体充填技术,而后两种充填技术封闭根管的能力相当。

关键词：侧方加压充填技术垂直加压充填技术 Thermafil充填技术 AH Plus根管封闭剂根管微渗漏根管充填

Route Optimization in Mobile Networks with Cache Assistance (RoMoNeCA)

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Route Optimization in Mobile Networks with Cache Assistance ...

作者： sahibzada Ahmed noor 北京邮电大学

学位级别：硕士

随着Internet的迅猛发展,因特网已经深入社会和人们的日常生活中。IP协议的出现使得人们可以通过静态方式接入因特网。伴随技术发展,移动IP(MobileIP)越来越受到人们的关注。传统的移动IP只针对单个节点,当前人们正在扩展移动IP从而支...

随着Internet的迅猛发展,因特网已经深入社会和人们的日常生活中。IP协议的出现使得人们可以通过静态方式接入因特网。伴随技术发展,移动IP(MobileIP)越来越受到人们的关注。传统的移动IP只针对单个节点,当前人们正在扩展移动IP从而支持网络移动性(Network Mobility,NEMO)。移动IP对不同的接入技术(WLAN,cellular,broadcast access)提供统一的网络层支持。随着技术进步,节点移动性研究已经向前迈进一大步形成NEMO。所谓NEMO是指一组节点(例如火车、汽车、飞机内部的人员)以子网的方式在移动中接入因特网。NEMO可以保证IP子网在移动的过程中子网内部节点正在进行的会话的连续性。移动的IP子网(mobile network)通过移动路由器(Mobile Router,MR)连接到因特网。这些移动的IP子网可以是由附着在MR上的单个本地节点组成的非嵌套网络,或者是内部嵌套多个IP子网的嵌套网络等。移动网络的不同网络拓扑带来一系列问题,而这些问题在单个节点移动性的研究中并没有出现,这也导致IETF专门成立NEMO工作组。该工作组的主要任务是提出对移动IPV6协议的扩展,从而解决NEMO及其相关问题。实验表明现存的移动IPV6协议无法给移动网络的内部节点转发数据包。本地代理(Home Agent)无法封装要转发给移动网络节点(MNN)的数据包。这是因为从本地代理角度看,HA-MR隧道是节点专用信道而非网络专用信道,因此本地代理只能发现隧道另一端的MR,而无法看到附着在该路由器上的节点。随着个人局域网(PAN)、车域网(CAN)、团体区域网(BAN)的出现以及传统的运输系统需要大量访问因特网,节点移动性协议已经无法满足实际需要,支持NEMO的相关协议呼之欲出。 NEMO基础支持协议(NBS)的提出解决了一组节点作为一个单元的移动接入互联网问题。这个单元称为移动IP子网或移动网络(Mobile Network),一个或多个MR处理来自或到达移动网络的通信。移动网络内部的节点称为移动网络节点(MNN),这些节点包括本地固定节点(LFN’s)、本地移动节点(LMN’s)以及外部的访问移动节点(VMN’s)。这些外部访问移动节点可以是单个移动IPV6节点,也可以是拥有多个MNN的MR。后者称为嵌套移动网络,所谓嵌套网络是指一个移动网络存在于另一个移动网络中。在嵌套移动网络中,被接入的MR称为上行流MR,接入的MR称为下行流MR。嵌套网络中的最顶层MR称为父MR,其下的所有MR称为子MR。不包含任何子网络的移动网络的嵌套等级为1,因此嵌套等级2表明一个小的移动网络嵌套在一个大的移动网络的内部。每个MR都有唯一的IP地址进行标示,称为本地地址,其在家乡链路上都有一个本地代理或称家乡代理(Home Agent,HA)。HA负责MR发送的数据在家乡网络的传递,它存储对应的MR的本地地址。当MR访问外部网络时,外部网络向MR提供一个转发地址(CoA),MR将转发地址与本地地址绑定,这种绑定称为绑定更新(BU)。MR将绑定更新发送给HA,HA将绑定更新的内容存储在绑定缓存中。接着HA向MR发送绑定确认,当成功完成该绑定过程后,MR与对应的HA之间的MR-HA隧道建立完成。此后所有发往移动网络的数据包首先由HA截取,通过添加标有转发地址的外部IP头进行封装,接着通过HA-MR隧道到达当前MR的转发地址。与进入移动网络的数据包相似,所有从移动网络的数据包同样需要经过MR添加IP头进行封装,然后通过HA-MR“双向隧道”传输。根据NEMO基础支持协议,所有在MR和对应节点(CN)之间通信的数据包都需要经过“双向隧道”传输。然而当MR和CN距离很近,却远离HA时,这可能导致长的路由以及大的包传输时延,影响服务质量。此外,长的路由路径将给路由网络增添额外的负载,从而增大链路中断的概率。每当数据包经由“双向隧道”时需要添加额外的IPV6路由头,这增大数据包的尺寸进而降低整体的带宽利用率,而且如果包尺寸超过链路的最大传输单元限制,需要拆分数据包从而增大包时延。此外,节点的封装处理同样也增大包的传输时延。根据NEMO基础支持协议,所有发自移动网络的流量都需要经由家乡链路到达目的地,这可能导致拥塞(瓶颈效应)。一旦家乡链路出现故障将导致所有进出移动网络的通信中断。由于担心流氓用户可能通过“双向隧道”向家乡网络发动攻击,安全策略阻止MR传输访问移动网络向家乡网络发送的流量。在嵌套网络中,如果两个移动通信节点需要通信,则所有的数据包都需要通过所有的上行流MR和对应的HA,这既增大包头同时也导致大的包传输时延。换一种情形,如果某个HA嵌套在某个移动网络中,则死循坏发生。MR无法找到其对应的HA进而无法建立“

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Enhancement of removal efficiency of heavy metal ions by polyaniline deposition on electrospun polyacrylonitrile membranes

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Water Science and Engineering 2021年第2期14卷 129-138页

作者： noor mohammad Yomen Atassi Department of Applied Physics Higher Institute for Applied Sciences and TechnologyDamascusSyria

This paper describes the preparation of a membrane of polyacrylonitrile(PAN)and its corresponding membrane coated with polyaniline(PANI)for the adsorption of heavy metal *** electron microscopy micrographs revealed that all the membranes exhibited nanofibrous *** prepared membranes were characterized by Fourier transform infrared spectroscopy(FTIR).The prepared membranes were used as an adsorbent for hazardous heavy metal ions Pb^(2+) and Cr_(2)O^(2-)_(7).The adsorption capacity and the removal efficiency of the membranes were examined as function of the initial adsorbate concentration and pH of the *** membranes with PANI showed better adsorption performance and their direct current(DC)conductivities were correlated to heavy metal ion *** isotherms were also performed,and the adsorption process was tested according to the Langmuir and Freundlich *** regeneration and reuse of the prepared membranes to re-adsorb heavy metal ions were also *** enhancement in adsorption performance and reusability of PANI-coated membranes in comparison with non-coated ones is fully *** results show that the maximum adsorption capacities of lead and chromate ions on the PANI-coated membranes are 290.12 and 1202.53 mg/g,respectively.

关键词： Membrane Electrospinning Polyaniline Polyacrylonitrile Heavy metal ion removal

MICELLAR PARAMETERS OF DIBLOCK COPOLYMERS AND THEIR INTERACTIONS WITH IONIC SURFACTANTS

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Chinese Journal of Polymer Science 2012年第2期30卷 217-226页

作者： noor Rehman Abbas Khan Iram Bibi mohammad Siddiq Department of Chemistry Quaid-I-Azam UniversityIslamabad 45320Pakistan Instituto de Quimica Universidade Federal do Rio Grande do SulUFRGS PO Box 15010CEP 91501-930Porto Alegre/RS/Brazil Department of Chemistry Abdul Wali Khan UniversityMardan K-PukhtoonkhwaPakistan

The interactions of non-ionic amphiphilic diblock copolymer poly（oxyethylene/oxybutylene）（E39B18） with anionic surfactant sodium dodecyl sulphate （SDS） and cationic surfactant hexadecyltrimethylammonium bromide （CTAB） were studied by using various techniques such as surface tension, conductivity, steady-state fluorescence and dynamic light scattering. Surface tension measurements were used to determine the critical micelle concentration （CMC） and thereby the free energy of micellization （AGmic）, free energy of adsorption （AG^ds）, surface excess concentration （F） and minimum area per molecule （A）. Conductivity measurements were used to determine the critical micelle concentration （CMC）, critical aggregation concentration （CAC）, polymer saturation point （PSP）, degree of ionization （tr） and counter ion binding （l]）. Dynamic light scattering experiments were performed to check the changes in physiochemical properties of the block copolymer micelles taken place due to the interactions of diblock copolymers with ionic surfactants. The ratio of the first and third vibronic peaks （11/Is） indicated the polarity of the pyrene micro environment and was used for the detection of micelle as well as polymer-surfactant interactions. Aggregation number （N）, number of binding sites （n） and free energy of binding （AGb） for pure surfactants as well as for polymer-surfactant mixed micellar systems were determined by the fluorescence quenching method.

关键词： Surface tension Conductivity Dynamic light scattering steady-state fluorescence Micellization.

IoT Smart Devices Risk Assessment Model Using Fuzzy Logic and PSO

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Computers, Materials & Continua 2024年第2期78卷 2245-2267页

作者： Ashraf S.Mashaleh noor Farizah Binti Ibrahim mohammad Alauthman mohammad Almseidin Amjad Gawanmeh School of Computer Sciences Universiti Sains MalaysiaPenangMalaysia Department Computer Center Al-Balqa Applied UniversitySaltJordan Department of Information Security Faculty of Information TechnologyUniversity of PetraAmmanJordan Department of Computer Science Tafila Technical UniversityTafilaJordan College of Engineering and IT University of DubaiDubaiUnited Arab Emirates

Increasing Internet of Things(IoT)device connectivity makes botnet attacks more dangerous,carrying catastrophic *** IoT botnets evolve,their dynamic and multifaceted nature hampers conventional detection *** paper proposes a risk assessment framework based on fuzzy logic and Particle Swarm Optimization(PSO)to address the risks associated with IoT *** logic addresses IoT threat uncertainties and ambiguities *** component settings are optimized using PSO to improve *** methodology allows for more complex thinking by transitioning from binary to continuous *** of expert inputs,PSO data-driven tunes rules and membership *** study presents a complete IoT botnet risk assessment *** methodology helps security teams allocate resources by categorizing threats as high,medium,or low *** study shows how CICIoT2023 can assess cyber *** research has implications beyond detection,as it provides a proactive approach to risk management and promotes the development of more secure IoT environments.

关键词： IoT botnet detection risk assessment fuzzy logic particle swarm optimization(PSO) cybersecurity interconnected devices

Harnessing Blockchain to Address Plasma Donation Network Challenges

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Computers, Materials & Continua 2023年第7期76卷 631-646页

作者： Shivani Batra mohammad Zubair Khan Gatish Priyadarshi Ayman noor Talal H.noor Namrata Sukhija Prakash Srivastava Department of Computer Science and Engineering SRM UniversityDelhi-NCR1310029India Department of Computer Science and Information Taibah UniversityMedina42353Saudi Arabia Department of Computer Science and Engineering KIET Group of InstitutionsDelhi-NCRGhaziabad201206India College of Computer Science and Engineering Taibah UniversityMadinahSaudi Arabia College of Computer Science and Engineering Taibah UniversityYanbuMadinahSaudi Arabia Department of Computer Science and Engineering Banasthali VidyapithRajasthan304022India Department of Computer Science and Engineering Graphic Era(Deemed to Be University)Dehradun248002India

Plasma therapy is an extensively used treatment for critically unwell *** this procedure,a legitimate plasma donor who can continue to supply plasma after healing is ***,significant dangers are associated with supply management,such as the ambiguous provenance of plasma and the spread of infected or subpar blood into medicinal ***,from an ideological standpoint,less powerful people may be exploited throughout the contribution ***,there is a danger to the logistics system because there are now just some plasma *** research intends to investigate the blockchain-based solution for blood plasma to facilitate authentic plasma *** parameters,including electronic identification,chain code,and certified ledgers,have the potential to exert a substantial,profound influence on the distribution and implementation process of blood *** understand the practical ramifications of blockchain,the current study provides a proof of concept approach that aims to simulate the procedural code of modern plasma distribution ecosystems using a blockchain-based *** agent-based modeling used in the testing and evaluation mimics the supply chain to assess the blockchain’s feasibility,advantages,and constraints for the plasma.

关键词： Blockchain hyperledger fabric information visibility plasma donation network plasma quality

Adaptive green traffic signal controlling using vehicular communication

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Frontiers of Information Technology & Electronic Engineering 2017年第3期18卷 373-393页

作者： Erfan SHAGHAGHI mohammad Reza JABBARPOUR Rafidah MD noor Hwasoo YEO Jason J.JUNG Department of Computer Systems and Technology University of Malaya Department of Computer Engineering Islamic Azad UniversityNorth Tehran Branch Department of Civil and Environmental Engineering Korea Advanced Institute of Science and Technology Department of Computer Engineering Chung-Ang University

The importance of using adaptive traffic signal control for figuring out the unpredictable traffic congestion in today's metropolitan life cannot be overemphasized. The vehicular ad hoc network(VANET), as an integral component of intelligent transportation systems(ITSs), is a new potent technology that has recently gained the attention of academics to replace traditional instruments for providing information for adaptive traffic signal controlling systems(TSCSs). Meanwhile, the suggestions of VANET-based TSCS approaches have some weaknesses:(1) imperfect compatibility of signal timing algorithms with the obtained VANET-based data types, and(2) inefficient process of gathering and transmitting vehicle density information from the perspective of network quality of service(Qo S). This paper proposes an approach that reduces the aforementioned problems and improves the performance of TSCS by decreasing the vehicle waiting time, and subsequently their pollutant emissions at intersections. To achieve these goals, a combination of vehicle-to-vehicle(V2V) and vehicle-to-infrastructure(V2I) communications is used. The V2 V communication scheme incorporates the procedure of density calculation of vehicles in clusters, and V2 I communication is employed to transfer the computed density information and prioritized movements information to the road side traffic controller. The main traffic input for applying traffic assessment in this approach is the queue length of vehicle clusters at the intersections. The proposed approach is compared with one of the popular VANET-based related approaches called MC-DRIVE in addition to the traditional simple adaptive TSCS that uses the Webster method. The evaluation results show the superiority of the proposed approach based on both traffic and network Qo S criteria.

关键词： Vehicular ad hoc network(VANET) Intelligent transportation systems(ITSs) Clustering Adaptive traffic signal control Traffic controller Fuel consumption

Atmospheric Convection Model Based Digital Confidentiality Scheme

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Computers, Materials & Continua 2022年第6期71卷 4503-4522页

作者： noor Munir Majid Khan mohammad Mazyad Hazzazi Amer Aljaedi Sajjad Shaukat Jamal Iqtadar Hussain Department of Applied Mathematics and Statistics Institute of Space TechnologyIslamabadPakistan Department of Mathematics College of ScienceKing Khalid UniversityAbha61413Saudi Arabia College of Computing and Information Technology University of TabukTabuk71491Saudi Arabia Department of Mathematics Statistics and PhysicsQatar UniversityDoha2713Qatar

Nonlinear dynamics is a fascinating area that is intensely affecting a wide range of different disciplines of science and technology *** combination of different innovative topics of information security and high-speed computing has added new visions into the behavior of complex nonlinear dynamical systems which uncovered amazing results even in the least difficult *** generation of complex actions froma very simple dynamical method has a strong relation with information *** protection of digital content is one of the inescapable concerns of the digitally advanced ***,information plays an important role in everyday life and affects the surroundings *** digital contents consist of text,images,audio,and videos,*** to the vast usage of digital images in the number of social and web applications,its security is one of the biggest *** this work,we have offered an innovative image encryption technique based on present criteria of confusion and *** designed scheme comprises two major nonlinear dynamical *** have employed discrete fractional chaotic iterative maps to add confusion capability in our suggested algorithm and continuous chaotic Lorenz *** have verified our offered scheme by using statistical *** investigations under the statistical tests suggested that our proposed technique is quite reasonable for the security of digital data.

关键词： Lorenz atmospheric convection model fractional logistic map image encryption S-box