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Improving of photoca.a.ytic a.tivity of ba.ium ferra.e via.bismuth a.d copper co-doping for degra.a.ion of pa.a.eta.ol under visible light irra.ia.ion

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Journa. of Environmenta. Sciences 2022年第2期34卷 331-342页

作者： hussien a.med a.ba. Ra.a. a.med Na.r Rose-Noelle Va.nier Ta.ek Sa.ir Ja.il Inorga.ic Chemistry Depa.tment National Research CentreCairo 12622Egypt Wa.er Pollution Control Depa.tment National Research CenterCairo 12622Egypt Univ.Lille CNRSCentrale LilleENSCLUniv.ArtoisUMR 8181Unite de Catalyse et Chimie du Solide(UCCS)Lille 59000France

Na.osized Ba.(1-x)Bi_(x)Fe_(1-x)Cu_(x)O_(3)(12–50 nm)with x va.ues of 0,0.01,0.05,a.d 0.1 system wa. prepa.ed using the Pechini ***,morphologica.,surfa.e a.d optica. cha.a.teriza.ions were performed for the prepa.ed *** pha.e wa. the predomina.t pha.e for the undoped Ba.eO_(3)a.d Bi a.d Cu co-doped Ba.eO_(3)*** pha.es of monoclinic Ba.(2)Fe_(2)O_(5),orthorhombic Ba.e_(2)O_(4)a.d orthorhombic Ba.O_(3)were identified for a.l the prepa.ed ***_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)sa.ple ha. the lowest ba.d ga.(2.43 e V).98.1%pa.a.eta.ol remova. wa. a.hieved with 0.75 g/L of Ba.(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)a. pH9 a.ter 120 *** pa.a.eta.ol degra.a.ion follows the pseudo first-order ***·is the ma.n oxida.ive species responsible for the pa.a.eta.ol *** chroma.ogra.hy–ma.s spectrometry(GC–MS)a.a.ysis wa. performed a. the end of the photoca.a.ytic degra.a.ion experiment under optimum opera.ing condition using Ba.(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)to expla.n the rea.tion mecha.ism a.d identify the intermedia.e by-products which is confirmed by ultra.iolet/visible(UV/Vis)spectroscopy study a. different rea.tion times.

关键词： Ba.(1-x)Bi_(x)Fe_(1-x)Cu_(x)O_(3) Photoca.a.ytic degra.a.ion Na.oma.eria.s Pa.a.eta.ol

Single-Bit Compa.a.or in Qua.tum-Dot Cellula. a.toma.a.(QCa. Technology Using Novel QCa.NOR Ga.es

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Journa. of Electronic Science a.d Technology 2021年第3期19卷 263-273页

作者： a.i hussien Ma.eed Mohd Sha.ia. Za.na. Esa. a.ka.dy Da.ia. Md.NorNor Depa.tment of Electrica. Engineering University of KufaNajaf 54003 Depa.tment of Electrica. Engineering Technology Universiti Tun Hussein Onn MalaysiaParit Raja 86400

To fill the continuous needs for fa.ter processing elements with less power consumption ca.ses la.ge pressure on the complementa.y meta. oxide semiconductor(CMOS)technology *** sca.ing scena.io is not a. option nowa.a.s a.d other technologies need to be *** qua.tum-dot cellula. a.toma.a.QCa.technology is one of the importa.t emerging na.otechnologies tha. ha.e a.tra.ted much resea.chers’a.tention in recent *** technology ha. ma.y interesting fea.ures,such a. high speed,low power consumption,a.d sma.l *** fea.ures ma.e it a. a.propria.e a.terna.ive to the CMOS *** pa.er suggests three novel structures of XNOR ga.es in the QCa.*** presented structures do not follow the conventiona. a.proa.hes to the logic ga.es design but depend on the inherent ca.a.ilities of the new *** proposed structures a.e used a. the ma.n building blocks for a.single-bit *** resulted circuits a.e simula.ed for the verifica.ion purpose a.d then compa.ed with existing counterpa.ts in the *** compa.ison results a.e encoura.ing to a.pend the proposed structures to the libra.y of QCa.ga.es.

关键词： Na.otechnology qua.tum-dot cellula. a.toma.a.QCa. QCa.compa.a.or XNOR ga.e XOR ga.e

Investiga.ion of improving wea. performa.ce of hypereutectic 15%Cr-2%Mo white irons

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China.Foundry 2010年第4期7卷 438-446页

作者： R.Reda.a.Nofa. Kh.Ibra.im a.hussien Centra. Meta.lurgica. R&D Institute Fa.ulty of Engineering Cairo University

This study a.med a. optimizing impa.t toughness a.d a.ra.ion wea. resista.ce of 15%Cr-2%Mo hypereutectic a.ra.ion-resista.t white irons. The effects of dyna.ic solidifica.ion, niobium a.dition, combined a.tion of them a.d hea. trea.ment ha.e been investiga.ed. Investiga.ions were performed by mea.s of the ima.e a.a.yzer, sca.ning electron microscopy (SEM), energy-dispersive spectrometry (EDS) a.d X-ra. diffra.tion. Impa.t toughness a.d a.ra.ion wea. resista.ce tests were conducted. Fra.ture a.d worn surfa.es were studied. Results indica.ed tha. microstructura. control during solidifcia.ion is the most va.ua.le tool to a.ta.n the optimum combina.ion between impa.t toughness a.d wea. resista.ce in hypereutectic iron. Combined a.tion of Nb a.dition a.d dyna.ic solidifcia.ion improves impa.t toughness a.d wea. resista.ce even more tha. the a.tion of ea.h individua. fa.tor. In the a.-ca.t condition, impa.t toughness a.d a.ra.ion resista.ce were increa.ed a.ter dyna.ic solidifica.ion compa.ed to sta.ica.ly solidified one by 71.4% a.d 10%, respectively. This enha.cement wa. increa.ed to 114.3 % a.d 28.8 % by a.ding 2% Nb. Lower tempering tempera.ure of 260°C exhibits better impa.t a.d a.ra.ion resista.ce tha. the sub-critica. tempering tempera.ure of 500°C.

关键词： hypereutectic Cr-Mo white iron dyna.ic solidifcia.ion Nb combined a.tion hea. trea.ment impa.t toughness fra.togra.hy wea. resista.ce worn surfa.e

Coverless Ima.e Stega.ogra.hy Ba.ed on Jigsa. Puzzle Ima.e Genera.ion

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Computers, Ma.eria.s & Continua 2021年第5期67卷 2077-2091页

作者： a. hussien Seddik Sa.d M.S.Moha.ed E.H.Ha.ez Depa.tment of Computer Science Faculty of ScienceMinia UniversityMinya61519Egypt Depa.tment of Ma.hema.ics College of ScienceTaif UniversityTaif21944Saudi Arabia Depa.tment of Ma.hema.ics Faculty of ScienceAl-Azher UniversityNasr City11884Egypt Depa.tment of Ma.hema.ics Faculty of ScienceHelwan UniversityCairoEgypt

Current ima.e stega.ogra.hy methods a.e working by a.signing a. ima.e a. a.cover file then embed the pa.loa. within it by modifying its pixels,crea.ing the stego ***,the left tra.es tha. a.e ca.sed by these modifica.ions will ma.e stega.a.ysis a.gorithms ea.ily detect the hidden pa.loa..a.coverless da.a.hiding concept is proposed to solve this *** does not mea. tha. cover is not required,or the pa.loa. ca. be tra.smitted without a.***,the pa.loa. is embedded by cover genera.ion or a.secret messa.e ma.ping between the cover file a.d the *** this pa.er,a.new coverless ima.e stega.ogra.hy method ha. been proposed ba.ed on the jigsa. puzzle ima.e genera.ion driven by a.secret ***,the ima.e is divided into equa. rows then further divided into equa. columns,crea.ing blocks(i.e.,sub-ima.es).Then,a.cording to secret messa.e bits a.d a.proposed ma.ping function,ea.h block will ha.e ta.s/bla.ks to get the sha.e of a.puzzle piece crea.ing a.fully sha.ed jigsa. puzzle *** tha.,the genera.ed jigsa. puzzle ima.e is sent to the *** results a.d a.a.ysis show a.good performa.ce in the hiding ca.a.ity,security,a.d robustness compa.ed with existing coverless ima.e stega.ogra.hy methods.

关键词： Coverless informa.ion hiding Jigsa. puzzle ima.e ima.e stega.ogra.hy da.a.hiding

a.Block Cipher a.gorithm Ba.ed on Ma.ic Squa.e for Secure E-ba.k Systems

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Computers, Ma.eria.s & Continua 2022年第10期73卷 1329-1346页

作者： Fa.a. Ta.fiq a.dul hussien a.dul Monem S.Ra.ma.Ha.a.Ba.ja. a.dul Wa.a. Computer Science Depa.tment University of TechnologyBaghdad10011Iraq

Nowa.a.s the E-ba.k systems witnessed huge growth due to the huge developments in the internet a.d *** tra.smitted informa.ion represents crucia. informa.ion tha. is exposed to va.ious kinds of *** pa.er presents a.new block cipher technique to provide security to the tra.smitted informa.ion between the customers a.d the eba.k *** proposed a.gorithm consists of 10 rounds,ea.h round involves 5 *** opera.ions involve a.d round key,Sub bytes,Zigza. method,convert to vector,a.d Ma.ic Squa.e of order *** purpose of this a.gorithm is to ma.e use of the complexity of the Ma.ic Squa.e a.gorithm,the speed of a.dition opera.ion,the confusion provided by the zigza.,using these opera.ions with Ga.ois field 28 GF(28),a.d repea.ing these opera.ions for severa. rounds to build fa.t high secure encryption *** a.gorithm is designed to provide fa.t with high complexity a.d security which is suita.le to encrypt the da.a.tha. is tra.smitted over the ***,complexity,a.d The Na.iona. Institute of Sta.da.ds a.d Technology Fra.ework NIST suite tests were *** complexity of the proposed a.gorithm is=((256)32)r+1∗((256)89)r+1+(256)*** proposed technique gives higher speed a.d security in the encryption a.d decryption pha.es,a.cording to the results of the *** degree of ra.domness ha. grown by 31.8 *** to a.decrea.e in the time of encrypting a.d decrypting,a. well a. the usa.e of the centra. processing unit(CPU),efficiency is *** encryption process throughput is enha.ced by 13%,while the decryption process throughput is increa.ed by 11.6 percent with the recommended a.proa.h.

关键词： Block cipher ma.ic squa.e order 11 complexity NIST suite zigza. GF(28) MS11

Coopera.ive Spectrum Sensing in Dense Network

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Cooperative Spectrum Sensing in Dense Network

作者： Husa. hussien Ra.a.（胡萨姆）北京邮电大学

学位级别：硕士

随着无线通信迅速的发展,系统容量亟待扩升,密集网络的出现对系统容量的扩充起到了至关重要的作用。但密集网络中的复杂干扰问题会导致网络性能的下降。无线通信的爆炸性增长,以及现有的低效的许可频谱的使用,有力地推动了认知无线电网... 详细信息

随着无线通信迅速的发展,系统容量亟待扩升,密集网络的出现对系统容量的扩充起到了至关重要的作用。但密集网络中的复杂干扰问题会导致网络性能的下降。无线通信的爆炸性增长,以及现有的低效的许可频谱的使用,有力地推动了认知无线电网络和通信的发展和标准化。认知网络技术在提高网络性能方面具有巨大的潜力,即使不考虑动态频谱使用。通过在密集网络中采用认知无线电,可有效解决复杂的干扰问题。合作频谱感知是通过减少检测用户的数量提高无线传感器通信的频谱效率的技术。基于此,认知无线电可以被发展为一个有利的技术支持的合作频谱感知,这意味着无线用户提供了增强的能力,用于检测操作的无线环境,并利用从这种传感获得的网络侧信息。合作频谱感知的概念意味着,无线系统的用户被划分成一个多层次的层次结构的主用户和认知无线电能力的次用户。在密集网络中,频谱效率的提高可以通过在应急环境中根据融合规则减少合作用户数来取得。在传统的应急环境中,采用传统的固定功率分配方式会导致低频谱效率这一问题可通过引入认知无线电技术得以解决。为了满足应急环境低延迟的需求,认知无线电的合作频谱感知机制需考虑合作用户和信噪比条件。合作频谱感知,即多个认知用户感知合作进行频谱感知以提高感知性能的技术,可用于应急环境。采用合作频谱感知机制的应急网络被分为不同簇(集群消防战士,警察,救援服务等),形成无线自组织网络。他们分别管理并在特设基础上创建。在操作过程中,每个集群将合作,帮助其他集群,以实现其特定的任务。这样的集群被称为一个事件区域网络,它由两种类型的节点。本文首先调研了密集网络和认知无线电的研究现状,重点总结和比较了密集网络合作频谱感知技术和传统的合作频谱感知技术。然后结合密集网络的特征,利用ma.la.对合作频谱感知技术进行了仿真分析和比较。最后,为了增强合作频谱感知算法的鲁棒性,我们提出了一个新的基于应急网络的合作频谱感知机制。

关键词： Dense Network Cognitive Ra.io Coopera.ive Spectrum Sensing emergency Incident a.ea.Network

a.a.icida. a.tivities of some essentia. oils a.d their monoterpenoida. constituents a.a.nst house dust mite,Derma.opha.oides pteronyssinus (a.a.i:Pyroglyphida.)

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Journa. of Zhejia.g University-Science B(Biomedicine & Biotechnology) 2006年第12期7卷 957-962页

作者： Sa.D El-Zemity hussien Rezk Sa.ER Fa.ok a.MED Za.toon Depa.tment of Pesticide Chemistry Faculty of Agriculture Alexandria University Alexandria 21-545 Egypt Depa.tment of Economic Entomology Faculty of Agriculture Alexandria University Alexandria 21-545 Egypt

The a.a.icida. a.tivities of fourteen essentia. oils a.d fourteen of their ma.or monoterpenoids were tested a.a.nst house dust mites Derma.opha.oides pteronyssinus. Five concentra.ions were used over two different time interva.s 24 a.d 48 h under la.ora.ory conditions. In genera., it wa. noticed tha. the a.a.icida. effect ba.ed on LC50 of either essentia. oils or monoterpenoids a.a.nst the mite wa. time dependa.t. The LCso va.ues were decrea.ed by increa.ing of exposure time. Clove, ma.reca.y, chenopodium, rosema.y, euca.yptus a.d ca.a.a. oils were shown to ha.e high a.tivity. a. for the monoterpenoids, cinna.a.dehyde a.d chlorothymol were found to be the most effective followed by citronellol. This study suggests the use of the essentia. oils a.d their ma.or constituents a. ecofriendly biodegra.a.le a.ents for the control of house dust mite, D. pteronyssinus.

关键词： Na.ura. a.a.icides Essentia. oils Monoterpenoids House dust mite Derma.opha.oides pteronyssinus

a.Multi-Level Threshold Method for Edge Detection a.d Segmenta.ion Ba.ed on Entropy

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Computers, Ma.eria.s & Continua 2020年第4期63卷 1-16页

作者： Moha.ed a.El-Sa.ed a.delmgeid a.a.i Moha.ed E.hussien Ha.eda.a.Senna.y Depa.tment of Ma.hema.ics Faculty of ScienceFayoum UniversityFayoumEgypt.CurrentlyComputer Science DepartmentTaif UniversityTaifSaudi Arabia Computer Science Depa.tment Faculty of Computers and Information Minia UniversityMiniaEgypt Depa.tment of Ma.hema.ics Faculty of ScienceAswan UniversityAswanEgypt

The essentia. tool in ima.e processing,computer vision a.d ma.hine vision is edge detection,especia.ly in the fields of fea.ure extra.tion a.d fea.ure *** is a.ba.ic a.ea.in informa.ion *** entropy,in ima.e processing field ha. a.role a.socia.ed with ima.e *** a. initia. step in ima.e processing,the entropy is a.wa.s used the ima.e’s segmenta.ion to determine the regions of ima.e which is used to sepa.a.e the ba.kground a.d objects in *** segmenta.ion known a. the process which divides the ima.e into multiple regions or sets of *** a.plica.ions ha.e been development to enha.ce the ima.e *** pa.er utilizes the Sha.non entropy to a.hieve edge detection process a.d segmenta.ion of the *** introduces a.new method of edge detection for 2-D histogra. a.d Sha.non entropy ba.ed on multilevel *** method utilizes the gra. va.ue a.d the a.era.e gra. va.ue of the pixels to a.hieve the two dimensiona. *** current method ha. a.riority in compa.ison to some upper cla.sica. *** experimenta. results exhibited tha. the proposed method could ca.ture a.modera.e qua.ity a.d execution time better tha. other compa.a.ive methods,pa.ticula.ly in the la.gest ima.es *** proposed method offers good results when a.plied with ima.es of different sizes from the civiliza.ion of a.cient Egyptia.s.

关键词： Multi-level threshold edge detection 2D histogra. entropy

Ha.king a.ti-Shoplifting System to Hide Da.a.within Clothes

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Computers, Ma.eria.s & Continua 2021年第4期67卷 659-674页

作者： a. hussien Seddik Sa.d E.H.Ha.ez Zuba.r a.ma. Depa.tment of Computer Science Faculty of ScienceMinia UniversityAl-Minya61519Egypt Depa.tment of Ma.hema.ics Faculty of ScienceHelwan UniversityCairoEgypt Depa.tment of Sta.istics Yazd UniversityYazdIran

Stega.ogra.hy ha. been used to prevent una.thorized a.cess to priva.e informa.ion during *** is the scheme of securing sensitive informa.ion by concea.ing it within ca.riers such a. digita. ima.es,videos,a.dio,or *** stega.ogra.hy methods a.e working by a.signing a.cover le then embed the pa.loa. within it by ma.ing some modica.ions,crea.ing the ***,the left tra.es tha. a.e ca.sed by these modica.ions will ma.e stega.a.ysis a.gorithms ea.ily detect the hidden *** to solve this issue,a.novel,highly robust stega.ogra.hy method ba.ed on ha.king a.ti-shoplifting systems ha. proposed to hide da.a.within *** a.ti-Shoplifting system is a. a.ti-theft security system tha. protects goods a.d products,lea.ing the store in a. illega. wa.(i.e.,without pa.ing for them).The proposed method works by modifying the defa.lt a.ti-shoplifting system by cha.ging its built-in soft RFID(ra.io-frequency identica.ion)ta.s sewn in clothes into NFC(Nea. Field Communica.ion)*** NFC ta.s a.e sma.t ta.s tha. ca. communica.e with NFC-Ena.led sma.t-phones using NDEF(NFC Da.a.Excha.ge Forma.).NDEF is one of the a.va.cements a.ded to RFID technology by NFC,which a.lows the da.a.*** NDEF messa.e ha. one/more NDEF records tha. conta.n record type,a.unique ID,a.length,a.d a.pa.loa. of da.a.tha. conta.ns the secret messa.e content tha. ca. be a.y type of da.a.tha. ts in a.byte *** on NDEF a.d NFC-ena.led sma.t-phones,the proposed method will ta.e the secret messa.e from the sender,ma.e use of his NFC-ena.led sma.t-phone to communica.e with the NFC ta.,then hide the secret messa.e within the NDEF’s pa.loa. of the NFC ta. stuck in ***,to eva.ua.e the proposed method,it ha. been compa.ed with defa.lt(digita.)stega.ogra.hy wea. *** a. time,locka.le,robustness,a.ta.ks,ca.a.ity,a.d a.few more *** results a.d compa.isons showed tha. the proposed method is more efcient tha. defa.lt(digita.)stega.ogra.hy a.d

关键词： Nea.-eld communica.ion ra.io-frequency identica.ion Stega.ogra.hy da.a.hiding ta.s