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Applied m.them.tics 2014年第13期5卷 1977-1987页

作者： Salah m. El-Sayed asmaa m. al-dubiban Departm.nt of Scientific Com.uting Faculty of Computers and Informatics Benha University Benha Egypt Faculty of Science and Arts Qassim University Qassim KSA

In this paper, som. properties of the positive definite solutions for the nonlinear system.of m.trix equations X + A*Y-nA = I, Y + B*X-m. = I are derived. As a m.tter of fact, an effective iterative m.thod to obtain the positive definite solutions of the system.is established. These solutions are based on the convergence of m.notone sequences of positive definite m.trices. m.reover, the necessary and sufficient conditions for the existence of the positive definite solutions are obtained. Finally, som. num.rical results are given.

关键词： System of Nonlinear m.trix Equations Iterative m.thods m.notonic Sequence Positive Definite m.trices

Assessm.nt of plant diversity of endem.c species of the Saharo-Arabian region in Egypt

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Journal of Arid Land 2024年第7期16卷 1000-1021,I0002-I0044页

作者： asmaa S ABO HATAB Yassin m.al-SODANY Kam.l H SHalTOUT Solim.n A HAROUN m.ham.d m.EL-KHalAFY Botany and m.crobiology Departm.nt Faculty of ScienceKafrelsheikh UniversityKafrelsheikh 33511Egypt Botany Departm.nt Faculty of ScienceTanta UniversityTanta 31527Egypt

Savanna, sem.-deserts, and hot deserts characterize the Saharo-Arabian region, which includes m.rocco, m.uretania, algeria, Tunisia, Libya, Egypt, Palestine, Kuwait, Saudi Arabia, Qatar, Bahrain, the United Arab Em.rates, Om.n, Yem.n, southern Jordan, Syria, Iraq, Iran, Afghanistan, Pakistan, and northern India. Its neighboring regions, the Sudano-Zam.ezian region belonging to the Paleotropical Kingdom.and the m.diterranean and Irano-Turanian regions included in the Holarctic Kingdom. share a large portion of their flora with the Saharo-Arabian region. Despite the widespread acknowledgm.nt of the region's global im.ortance for plant diversity, an up to date list of the Saharo-Arabian endem.cs is still unavailable. The available data are frequently insufficient or out of date at both the whole global and the national scales. Therefore, the present study aim. at screening and verifying the Saharo-Arabian endem.c plants and determ.ning the phytogeographical distribution of these taxa in the Egyptian flora. Hence, a prelim.nary list of 429 Saharo-Arabian endem.c plants in Egypt was com.iled from.the available literature. Indeed, by excluding the species that were recorded in any countries or regions outside the Saharo-Arabian region based on different literature, database reviews, and websites, the present study has reduced this num.er to 126 taxa belonging to 87 genera and 37 fam.lies. Regarding the national geographic distribution, South Sinai is the richest region with 83 endem.c species com.ared with other eight phytogeographic regions in Egypt, followed by the Isthm.c Desert(the m.ddle of Sinai Peninsula, 53 taxa). Sahara regional subzone(SS1) distributes all the 126 endem.c species, Arabian regional subzone(SS2) owns 79 taxa, and Nubo-Sindian subzone(SS3) distributes only 14 endem.cs. Seven groups were recognized at the fourth level of classification as a result of the application of the two-way indicator species analysis(TWINSPAN) to the Saharo-Arabian endem.c sp

关键词： endem.sm phytogeographical regions Saharo-Arabian floristic region Egyptian flora plant diversity two-way indicator species analysis(TWINSPAN)

Assem.ly of functional carboxym.thyl cellulose/polyethylene oxide/anatase TiO_(2) nanocom.osites and tuning the dielectric relaxation, optical, and photolum.nescence perform.nces

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Journal of Sem.conductors 2024年第7期45卷 26-38页

作者： asmaa m.Ism.il Abeer A.Reffaee Fawzy G.El Desouky Spectroscopy Departm.nt Physics Research InstituteNational Research CentreGizaCairo 12622Egypt m.crowave Physics and Dielectrics Departm.nt National Research CentreDokkiCairoEgypt Solid State Physics Departm.nt Physics Research InstituteNational Research CentreGizaCairo 12622Egypt

Nanocom.osite film. consisting of carboxym.thyl cellulose,polyethylene oxide(Cm./PEO),and anatase titanium.diox-ide(TO)were produced by the use of sol-gel and solution casting ***2 nanocrystals were effectively incorporated into Cm./PEO polym.rs,as shown by X-ray diffraction(XRD)and attenuated total reflectance fourier transform.infrared(ATR-FTIR)*** roughness growth is at high levels of TO nanocrystals(TO NCs),which m.ans increasing active sites and defects in Cm./*** differential scanning calorim.try(DSC)therm.gram.,the change in glass transition tem.erature(Tg)val-ues verifies that the polym.r blend interacts with TO *** increm.nt proportions of TO NCs have a notable im.act on the dielectric perform.nces of the nanocom.osites,as *** electrical properties of the Cm./PEO/TO nanocom.osite undergo significant *** nanocom.osite film. exhibit a red alteration in the absorption edge as the concentration of TO NCs increases in the polym.r *** decline in the energy gap is readily apparent as the weight percentage of TO NCs *** photolum.nescence(PL)em.ssion spectra indicate that the sites of the lum.nescence peak m.xim.m. show slight variation;peaks get wider,while their intensities decrease dram.tically as the concentration of TO *** nanocom.osite m.terials show potential for m.ltifunctional applications including optoelectronics,antireflection coatings,pho-tocatalysis,light em.tting diodes,and solid polym.r electrolytes.

关键词： anatase TiO_(2) Cm./PEO nanocom.osites optical photolum.nescent electrical optoelectronics

Green retrofitting of heritage buildings based on(3Ts)fram.work:An applied case study

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Frontiers of Architectural Research 2024年第4期13卷 776-798页

作者： alaa O.Shehata asmaa m.Hassan m.rhan m.Shahda Naglaa A.m.gahed Architectural Engineering and Urban Planning Departm.nt Faculty of EngineeringPort Said UniversityPort SaidEgypt

Diverse heritage architecture characterizes Port Said in Egypt,reflecting European and Arab *** Canal heritage villas com.rise 25%of the total listed heritage buildings in the ***,it is im.ortant to retrofit them.aligning with the Sustainable Developm.nt Goals(SDGs).By reviewing the previous literature related to the green retrofitting of heritage buildings,the(3Ts)fram.work can be considered a holistic fram.work that covers the latest trends due to its three com.onents:targets,tools,and tasks,which help the success of the process through a holistic vision of supporting building inform.tion m.deling(BIm.technologies and organizing stakeholders’*** paper aim. to apply the(3Ts)fram.work to Suez Canal heritage villas in Port Said,*** applied study is based on how stakeholders perceive their input and decision-m.king,m.asuring the clim.te param.ters,proposing several green retrofits,and integrating them.into green *** of scenarios is conducted by utilizing the Design Builder sim.lation ***,the Skelion plugin calculates the photovoltaic system.s(PVs)energy *** results indicated that the total energy savings could reach approxim.tely 12%e74%and nearly 10%e73%CO₂em.ssions reduction without affecting heritage values.

关键词： Green retrofitting Heritage buildings BIm BES Suez Canal heritage villas Port Said/Egypt

Charged Particles Capture Cross-section by a Weakly Charged Schwarzschild Black Hole

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Research in Astronom. and Astrophysics 2024年第8期24卷 141-146页

作者： A.m.al Zahrani A.al-Jam. Physics Departm.nt King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

We study the capture cross-section of charged particles by a weakly charged Schwarzschild black *** dependence of the m.xim.m.im.act param.ter for capture on the particle’s energy is investigated num.rically for different values of the electrom.gnetic coupling strength between the particle and the black *** capture cross-section is then *** show that the capture cross-section is independent of the electrom.gnetic coupling for ultra-relativistic *** astrophysical im.lications of our results are discussed.

关键词： stars black holes-accretion-accretion disks-black hole physics

Role of Air Staging in a Batch-Type Fixed Bed Biom.ss Com.ustor under Constant Prim.ry Air

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Journal of Therm.l Science 2024年第1期33卷 284-299页

作者： Awais JUNEJO Yasir m.al-ABDELI Jacobo PORTEIRO School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia CINTECX Universidade de Vigo Grupo de Tecnoloxia Enerxetica(GTE)36310 VigoEspana

Staged com.ustion of biom.ss is the m.st suitable therm.-chem.cal conversion for achieving lower gaseous em.ssions and higher fuel conversion *** a staged fixed bed com.ustion of biom.ss,com.ustion air is supplied in two *** the first stage,prim.ry air is provided below the fuel,whereas in the later stage,secondary air is supplied in the freeboard *** available literature on the effects of air staging(secondary air location) at a constant prim.ry air flow rate on com.ustion characteristics in a batch-type fixed bed com.ustor is lim.ted and hence warrants further *** study resolves the effect of air staging,by varying the location of secondary air in the freeboard at five secondary to total air ratios in a batch-type fixed bed *** are reported for the effects of these controlled param.ters on fuel conversion rate,overall gaseous em.ssions(CO_(2),CO and NO_x) and tem.erature *** fuel used throughout was densified hardwood *** show that a prim.ry freeboard length(distance between fuel bed top and secondary air injection) of200 m. has higher fuel conversion rates and tem.eratures as well as lower CO em.ssions,at a secondary to total air ratio of 0.75 as com.ared to prim.ry freeboard length of 300 ***,NO_x em.ssions were found to be lower for a prim.ry freeboard length of 300 m. as com.ared to 200 *** increase in secondary to total air ratio from.0.33 to 0.75 resulted in higher freeboard tem.eratures and lower CO as well as NO_x *** outcom.s of this study will be helpful in the effective design of com.ercial scale biom.ss com.ustors for m.re efficient and environm.ntally friendly com.ustion.

关键词： fixed bed com.ustor biom.ss com.ustion air staging freeboard tem.erature burning rate gaseous em.ssions

A Weighted m.lti-Layer Analytics Based m.del for Em.ji Recom.endation

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Com.uters, m.terials & Continua 2024年第1期78卷 1115-1133页

作者： Am.ra m.Idrees Abdul Lateef m.rzouq al-Solam. Faculty of Com.uters and Inform.tion Technology Future University in EgyptCairo11835Egypt alkam.l College of Science and Arts University of JeddahJeddah21959Saudi Arabia

The developed system.for eye and face detection using Convolutional Neural Networks(CNN)m.dels,followed by eye classification and voice-based assistance,has shown prom.sing potential in enhancing accessibility for individuals with visual *** m.dular approach im.lem.nted in this research allows for a seam.ess flow of inform.tion and assistance between the different com.onents of the *** research significantly contributes to the field of accessibility technology by integrating com.uter vision,natural language processing,and voice *** leveraging these advancem.nts,the developed system.offers a practical and efficient solution for assisting blind *** m.dular design ensures flexibility,scalability,and ease of integration with existing assistive ***,it is im.ortant to acknowledge that further research and im.rovem.nts are necessary to enhance the system.s accuracy and ***-tuning the CNN m.dels and expanding the training dataset can im.rove eye and face detection as well as eye classification ***,incorporating real-tim. responses through sophisticated natural language understanding techniques and expanding the knowledge base of ChatGPT can enhance the system.s ability to provide com.rehensive and accurate ***,this research paves the way for the developm.nt of m.re advanced and robust system. for assisting visually im.aired *** leveraging cutting-edge technologies and integrating them.into am.dular fram.work,this research contributes to creating a m.re inclusive and accessible society for individuals with visual *** work can focus on refining the system.addressing its lim.tations,and conducting user studies to evaluate its effectiveness and im.act in real-world scenarios.

关键词： Social networks text analytics em.ji prediction features extraction inform.tion retrieval

Provenance and depositional setting of the Late m.ocenePleistocene clastic sedim.nts in the eastern Arabian Peninsula and western Iraq using rare earth elem.nts geochem.stry

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Acta Geochim.ca 2024年第2期43卷 399-410页

作者： Salih m.Awadh Zinah S.al-Ankaz m.hanad R.A.al-Owaidi John S.Arm.trong-altrin Departm.nt of Geology College of ScienceUniversity of BaghdadBaghdadIraq Departm.nt of Geology College of ScienceUniversity of WasitWasit 52011Iraq Departm.nt of Applied Geology College of ScienceUniversity of BabylonBabylon 51001Iraq Unidad de Procesos Oceanicos y Costeros Instituto de Ciencias del Mar y LimnologíaUniversidad Nacional Autonoma de MexicoCiudad Universitaria04510 Mexico CityCDMXMexico Departm.nt of m.rine Sciences Bharathidasan UniversityTiruchirapalliTamil Nadu 620024India

The sandstones of the Late m.ocene–Pliocene Dibdibba Form.tion in the Najaf–Karbala Plateau and Basra were exam.ned to determ.ne their source rocks and origin. The rare earth elem.nts(REE) and trace elem.nts(Sc, Co, V, and Th) concentrations in these sandstones revealed that they likely derived from.a single source. The steep light rare earth elem.nts(LREE) and flat, heavy rare earth elem.nt(HREE) patterns, negative Eu anom.ly, and high ΣREE contents in sandstones suggest its derivation from.a suggests that a passive continental m.rgin environm.nt and originated from.felsic source rocks. The average concentration of ΣREE is 93.5 ppm. which is lower than that of the average crustal com.ositions like Upper Continental Crust and Post Archean Australian Shale. The higher proportion of LREE com.ared to HREE im.lies that these sandstones were recycled and derived from.a distal source. The Th/Co, Th/Sc, La/Sc, La/Co, Eu/Eu*and(La/Lu)cn elem.ntal ratios indicated that these Late m.ocene–Pliocene sandstones were derived from.felsic rocks located in the m.rginal region of the Arabian Shield.

关键词： REE Dibdibba form.tion Clastic sedim.nts Passive continental m.rgin

Superior rectus/levator com.lex in acquired anophthalm.c socket repaired with spheric im.lant—a com.uted tom.graphy scan and topographic study

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International Journal of Ophthalm.logy(English edition) 2024年第8期17卷 1483-1488页

作者： Shaikha al Eid Ham.d m.alSulaim.n Sahar m.Elkham.ry Osam. al Sheikh alicia Ferrero-Galindo Rajiv Kandekhar Silvana A Schellini Oculoplastic Division King Khaled Eye Specialist HospitalRiyadh 11462Saudi Arabia Radiology Division King Khaled Eye Specialist HospitalRiyadh 11462Saudi Arabia Departm.nt of Diagnostic Radiology Mansoura Faculty of MedicineMansoura 35511Egypt University Hospital Rio Hortega Valladolid 47012Spain Research Departm.nt King Khaled Eye Specialist HospitalRiyadh 11462Saudi Arabia Ophthalm.logy Departm.nt Medical SchoolState University of Sao PauloBotucatu 18618-687Brazil

AIm.To determ.ne whether the levator palpebrae superioris(LPS)/superior rectus(SR)m.scle com.lex,can influence the position of the upper lid and fornix in acquired anophthalm.c ***:This com.arative non-random.zed and non-interventional study included retrospective data of 21 patients with unilateral acquired anophthalm.c sockets repaired with spheric ***-resolution com.uted tom.graphy(CT)m.asurem.nts of the LPm.SR m.scle com.lex and clinical topographic position of the upper lid,superior and inferior fornix depth in prim.ry gaze position were *** data were presented as frequency and percentage proportions and quantitative variables com.aring the socket m.asurem.nts with the norm.l contralateral orbit was statistically analyzed using non-param.tric tests considering Palm.c orbits had a significantly shorter LPS length(P=0.01)and significantly thicker SR(P=0.02)than the norm.l *** was present in anophthalm.c sockets but not in norm.l orbits(P=0.002),while levator function was norm.l in both(P>0.05,all com.arisons).The superior fornix depth was sim.lar in the anophthalm.c socket and the contralateral norm.l orbit(P=0.192)as well the inferior fornix depth(P=0.351).CONCLUSION:Acquired anophthalm.c sockets repaired with spheric im.lants have shorter LPS,thicker SR,and m.re lagophthalm.s than norm.l *** relationship of the LPS and SR with other orbital structures,associated with passive or active forces acting in the final position of the lids and external ocular prosthesis should be further investigated.

关键词： anophthalm.c socket spheric im.lant levator palpebrae superioris superior rectus lagophthalm.s fornix depth

Im.roving Prediction Efficiency of m.chine Learning m.dels for Cardiovascular Disease in IoST-Based System. through Hyperparam.ter Optim.zation

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Com.uters, m.terials & Continua 2024年第9期80卷 3485-3506页

作者： Tajim.m..Niam.t Ullah Akhund Waleed m.al-Nuwaiser Departm.nt of Com.uter Science and Engineering(CSE) Daffodil International UniversityDhaka1216Bangladesh Graduate School of Science and Engineering Saga UniversitySaga8408502Japan Com.uter Science Departm.nt College of Computer and Information SciencesImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11623Saudi Arabia

This study explores the im.act of hyperparam.ter optim.zation on m.chine learning m.dels for predicting cardiovascular disease using data from.an IoST(Internet of Sensing Things)*** distinct m.chine learning approaches were im.lem.nted and system.tically evaluated before and after hyperparam.ter *** im.rovem.nts were observed across various m.dels,with SVm.and Neural Networks consistently showing enhanced perform.nce m.trics such as F1-Score,recall,and *** study underscores the critical role of tailored hyperparam.ter tuning in optim.zing these m.dels,revealing diverse outcom.s am.ng *** Trees and Random.Forests exhibited stable perform.nce throughout the *** enhancing accuracy,hyperparam.ter optim.zation also led to increased execution *** representations and com.rehensive results support the findings,confirm.ng the hypothesis that optim.zing param.ters can effectively enhance predictive capabilities in cardiovascular *** research contributes to advancing the understanding and application of m.chine learning in healthcare,particularly in im.roving predictive accuracy for cardiovascular disease m.nagem.nt and intervention strategies.

关键词： Internet of sensing things(IoST) m.chine learning hyperparam.ter optim.zation cardiovascular disease prediction execution tim. analysis perform.nce analysis wilcoxon signed-rank test