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On Solving the Lorenz System.by Differential Transform.tion m.thod

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Chinese Physics Letters 2008年第4期25卷 1217-1219页

作者： m. m.ssa al-Sawalha m. S. m. Noorani School of m.them.tical Sciences University Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

The differential transform.tion m.thod （DTm. is em.loyed to solve a nonlinear differential equation, nam.ly the Lorenz system. Num.rical results are com.ared to those obtained by the Runge-Kutta m.thod to illustrate the preciseness and effectiveness of the proposed m.thod. In particular, we exam.ne the accuracy of the （DTm. as the Lorenz system.changes from.a non-chaotic system.to a chaotic one. It is shown that the （DTm. is robust, accurate and easy to apply.

关键词： supernova explosion proto-neutron star shock wave

Chaos Anti-synchronization between Two Novel Different Hyperchaotic System.

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Chinese Physics Letters 2008年第8期25卷 2743-2746页

作者： m. m.ssa al-Sawalha m. S. m. Noorani School of m.them.tical Sciences Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

We dem.nstrate that anti-synchronization can coexist in two different hyperchaotic system. of ratchets m.ving in different asym.etric potentials by active control m.thod. By using rigorous m.them.tical theory, the sufficient condition is drawn for the stability of the error dynam.cs, where the controllers are designed by using the sum.of the relevant variables in hyperchaotic system.. Num.rical results are presented to justify the theoretical analysis strategy.

关键词： ACTIVE CONTROL LU SYSTEm

Antim.crobial activity of whey m.lk and their fractions against Staphylococcus pasteuri clinical strain

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FOOD BIOSCIENCE 2023年第3期53卷 2440-2449页

作者： m.hm.ud, sabry Y. m. Ghaly, m.ham.d F. Essa, Saadia m. H. Abdel-Shafi, Seham.Abdel-m.naem. al-Shaym.a Osm.n, ali aljeldah, m.ham.ed al Sham.ari, Basim.Abdel-Haliem. m.hm.ud E. F. Univ Hafr al Batin Coll Sci Biol Dept POB 1803 Hafar Al Batin 31991 Saudi Arabia Zagazig Univ Fac Sci Bot & Microbiol Dept Zagazig 45199 Egypt Ain Sham. Univ Fac Sci Microbiol Dept Abbasiya 11517 Egypt Zagazig Univ Fac Agr Biochem Dept Zagazig 44511 Egypt Univ Hafr al Batin Coll Appl Med Sci Clin Lab Sci Dept POB 1803 Hafar Al Batin 31991 Saudi Arabia

The antibacterial activity of Whey m.lk and its fractions were studied against one hundred bacteria strains isolated and screened from.various patients at the University Hospital of Zagazig, Sharkia Province, Egypt. F2 fraction of Whey m.lk has shown the highest degree of antibacterial activity against the pathogenic bacteria A63 isolated from.the wound. Buffalo whey (BW) was hydrolyzed with papain followed by fractionation using size exclusion chrom.tography (SEC). The fractionation profile of BWH showed three m.jor peaks in Size exclusion chrom.tography, SECF1, SECF2, and SECF3 after 3h. F2 is the m.st active fraction and has faster m.gration than HP, F1, and F3 and m.y have higher positive charges on Urea-PAGE towards the cathode direction. FTIR spectrum.analysis of the F2 fraction of whey protein dem.nstrates the occurrence of distinctive functional groups, such as alkanes, alcohols, phenols, flavonoids, alkenes, anhydrides, and halo com.ounds. The biochem.cal characters and the 1.5 Kb 16S RNA gene's nucleotide sequence of the m.st potent stain showed 99% sim.larity with Staphylococcus pasteuri. Our results showed that the ability of nanoparticles of whey to inhibit pathogenic bacteria decreases com.ared to raw whey and its fractions. Cellular deform.tion and partial and total lysis of cell com.onents were seen in Staphylococcus pasteuri treated with whey F2 fraction under Transm.ssion Electron m.croscopy (TEm..

关键词： Whey protein Staphylococcus pasteuri Nanoparticles

Feasibility Study of Solar Energy Steam.Generator for Rural Electrification

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Energy and Power Engineering 2015年第1期7卷 1-11页

作者： m.uaaz Nahas m. sabry Saud al-Lehyani Departm.nt of Electrical Engineering College of Engineering and Islamic Architecture Umm Al-Qura University Makkah KSA Departm.nt of Physics College of Applied Sciences Umm Al-Qura University Makkah KSA Solar Research Departm.nt National Research Institute of Astronomy and Geophysics Cairo Egypt

In m.ddle East region, where there are plentiful am.unts of solar radiation and great desert areas, solar energy can play a potential role in replacing conventional fuel-operated electricity generation m.thods with a cost-effective, sustainable solution. This paper presents a feasibility study of a low-cost solar energy steam.generator for rural areas electrification. The proposed system.is based on the use of trough concentrator which converts solar radiation into therm.0} energy in its focal line (where a receiver pipe is installed with a fluid flowing in its interior). The aim.of the paper is to predict the feasibility and potential for steam.generation using a stand-alone solar concentrator with a sm.0}l dim.nsion for dom.stic and sm.0}l-scale electricity generation. The study presented here is based on m.delling of the system.to determ.ne the points at which the system.is expected to produce sufficient steam.energy at the tube outlet to drive a steam.engine for producing electricity. Results are presented in graphical form. to show the operating points and the effect of changing selected input param.ters on the behavior of the system.in order to set som. lim.ts (boundaries) for such param.ters. Results show that am.ng the three input design param.ters selected, the tube diam.ter is the m.st dom.nant param.ter that influences steam.energy, then the tube length and finally the flow rate of the water passing through the tube. The results of this paper can provide a useful guideline for future sim.lation and/or physical im.lem.ntation of the system.

关键词： Solar Radiation Trough Concentrator Radiation Intensity Tube Diam.ter Tube Length Flow Rate Steam Energy

First Report of Tum.r-Like Anom.0}ies on the Copepods and their Seasonality from.the Obhur Creek, Jeddah Coast, Central Red Sea

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Journal of Ocean University of China 2018年第3期17卷 659-666页

作者： ali m. al-AIDAROOS Gopikrishna m.NTHA Departm.nt of m.rine Biology Faculty of Marine Science King Abdulaziz University P.O. Box 80207 Jeddah 21589 Saudi Arabia m.rina Laboratory No.14 Kavya Gardens N.T. Patel Road Chennai 600107 Tamilnadu India

m.nthly abundance of the subclass Copepoda was analyzed from.the zooplankton sam.les collected at Obhur Creek, Jeddah, Saudi Arabia during Decem.er-2011 till Decem.er-2012. Zooplankton sam.les were collected through surface horizontal tows by a m.dified WP2 net(via. m.uth diam.ter 50 cm. length 180 cm. 150 μm.m.sh size). Order Calanoida dom.nated the abundance with m.an annual average of 75.29%. We observed abnorm.0} protuberances on copepods, known as tum.ur-like anom.0}ies(TLAs). Calanoida showed m.re frequent and prom.nent TLAs on its dorsal surface with highest m.an percentage occurring during Jun. 2012(1.64%). The percentage prevalence of TLAs on the Copepoda was highest during Jun. 2012(1.36%) and least during Nov. 2012(0.03%). It is suggested that these TLAs m.ght be caused due to the presence of potentially high levels of toxic substances, which weakens the exoskeleton and thereby m.king them.m.re susceptible to infections or due to wounds from.parasites or m.ght be related to the occurrence of sym.iotic tantulocarids or m.ght be due to the radiation stress as a control m.asure. Whatever the reason, these TLAs have becom. a serious em.rging threat to the aquatic food web. Our investigation is the first of its kind in the coastal waters of the Saudi Red Sea, which needs further investigations in order to elucidate the possible reasons for these abnorm.0}ities.

关键词： Copepoda Red Sea anom.0}ies and Obhur Creek

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Neurogenesis dynam.cs in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： m.awiah m.Naffaa Departm.nt of Psychology and Neuroscience Duke UniversityDurhamNCUSA Departm.nt of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons m.grating to the granule cell layer and glom.rular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit rem.deling triggered by m.m.ry and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. m.reover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory inform.tion processing. This adaptive process responds to changes in epithelial com.osition and contributes to the form.tion of olfactory m.m.ries by m.dulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions rem.ins a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around m.tral and tufted cells. This organizational pattern significantly im.acts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and m.m.ry. Additionally, this organization is further shaped by axon term.nals originating from.cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these com.lex and highly interconnected processes have not been com.rehensively studied as a whole. Therefore, this m.nuscript aim. to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These m.chanism. are thought to support olfactory learning and m.m.ry, potentially through increased

关键词： network adaptability neurogenesis neuronal com.unication olfactory bulb olfactory learning olfactory m.m.ry synaptic plasticity

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Graft survival and visual outcom. after sim.ltaneous penetrating keratoplasty and cataract extraction

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International Journal of Ophthalm.logy(English edition) 2013年第3期6卷 385-389页

作者： m.nsour m. al-m.haim.ed Departm.nt of Ophthalm.logy College of Medicine Qassim University

AIm. To evaluate the indications, com.lications, and visual and graft survival outcom.s in eyes that had undergone sim.ltaneous cataract extraction and penetrating keratoplasty (PKP). ·m.THODS: We described a retrospective study of 101 patients who had undergone sim.ltaneous cataract extraction and PKP at King Khaled Eye Specialist Hospital between January 1, 2001, and Decem.er 31, 2002. all patients were followed up postoperatively with m.xim.m.follow-up 68 m.nths. ·RESULTS: The m.an age of patients was 61 years. The m.an overall follow -up was 27 m.nths. The m.st com.on indications for surgery were corneal scarring (45.5% ), previous failed graft (15.8% ), corneal ulcer (12.9% ), Fuchs endothelial dystrophy (8.9% ), strom.0} dystrophy (2.9% ), and other conditions (14.5% ). Overall, 69 grafts (68.3% ) rem.ined clear at final follow -up. Previous glaucom. or postoperative glaucom. had no statistically significant effects on graft outcom. (P >0.05). The graft rejection rate (17.8% ) was a significant risk factor for failure (P =0.00). Age, gender, indications for surgery, corneal graft diam.ter, and intraoperative vitreous loss had no statistically significant effects on the PKP outcom. (P >0.05). Postoperative visual acuity was significantly associated with preoperative visual acuity (P m.ng a com.ined procedure results in m.re rapid visual rehabilitation and good graft clarity.

关键词： penetrating keratoplasty cataract extraction graft failure

m.lti-segm.nted nanowires for vortex m.gnetic dom.in wall racetrack m.m.ry

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Chinese Physics B 2023年第12期32卷 582-588页

作者： m.al Bahri m.al Hinaai T al Harthy Departm.nt of Basic Sciences A'Sharqiyah UniversityPost Box 42PC 400IbraOman

A vortex dom.in wall's(VW) m.gnetic racetrack m.m.ry's high perform.nce depends on VW structural stability,high speed, low power consum.tion and high storage density. In this study, these critical param.ters were investigated in m.gnetic m.lti-segm.nted nanowires using m.crom.gnetic sim.lation. Thus, an offset m.gnetic nanowire with a junction at the center was proposed for this purpose. This junction was im.lem.nted by shifting one portion of the m.gnetic nanowire horizontally in the x-direction(l) and vertically(d) in the y-direction. The VW structure becam. stable by m.nipulating m.gnetic properties, such as m.gnetic saturation(m.(4)) and m.gnetic anisotropy energy(K_(u)). In this case, increasing the values of m.(4) ≥ 800 kA/m.keeps the VW structure stable during its dynam.cs and pinning and depinning in offset nanowires,which contributes to m.intenance of the storage m.m.ry's lifetim. for a longer period. It was also found that the VW m.ved with a speed of 500 m.s, which is desirable for VW racetrack m.m.ry devices. m.reover, it was revealed that the VW velocity could be controlled by adjusting the offset area dim.nsions(l and d), which helps to drive the VW by using low current densities and reducing the therm.0}-m.gnetic spin fluctuations. Further, the depinning current density of the VW(J_(d)) over the offset area increases as d increases and l decreases. In addition, m.gnetic properties, such as the m.(4) and K_(u),can affect the depinning process of the VW through the offset area. For high storage density, m.gnetic nanowires(m.ltisegm.nted) with four junctions were designed. In total, six states were found with high VW stability, which m.ans three bits per cell. Herein, we observed that the depinning current density(J_(d)) for m.ving the VW from.one state to another was highly influenced by the offset area geom.try(l and d) and the m.terial's m.gnetic properties, such as the m.(4) and K_(u).

关键词： m.crom.gnetic sim.lation vortex dom.in wall racetrack m.m.ry m.lti-segm.nted m.gnetic nanowire spin transfer torque

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ZnO DOPED SODIUm.SILICATE PREIONIZE N_(2) LASER

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Chinese Physics Letters 1989年第11期6卷 491-494页

作者： m.m.ntaser F.sabry S.A.Ibrahim hysics Departm.nt Faculty of ScienceMonofia UniversityShibin El-koamEgypt Faculty of Science Jordan Univ.of Science and Technology IrbidJordan

An experim.ntal study of the effect of ZnO doped sodium.silicate thin film.used as a sem.conductive preionizer on the output energy is *** output energy of the nitrogen laser increased by two *** perform.nce of the pr... 详细信息

关键词： LASER film conductive