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A simple single-step approach towards synthesis of nanoflu.ds containing cu.octahedral cu.rou. oxide particles u.ing glu.ose redu.tion

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Frontiers of Materials s.i.nce 2018年第1期12卷 74-82页

作者： u. sandhya sHENOY A. Nityananda sHETTY Department of Chemistry National Institute of Technology Karnataka Surathkal Mangalore 575025 Karnataka India Department of Chemistry College of Engineering and Technology Srinivas University Mangalore 574146 India

Enhancement of thermal properties of conventional heat transfer flu.ds has become one of the important technical challenges. since nanoflu.ds offer a promising help in this regard, development of simpler and hassle free rou.es for their synthesis.i. of u.most importance. synthesis of nanoflu.ds u.ing a hassle free rou.e with greener chemicals has been reported. The single-step chemical approach reported here overcomes the drawbacks of the two-step procedu.es.i. the synthesis of nanoflu.ds. The resu.ting Newtonian nanoflu.ds prepared contained cu.octahedral particles of cu.rou. oxide and exhibited a thermal condu.tivity of 2.852 W- m-1. K-1. Polyvinylpyrro- lidone （PVP） u.ed du.ing the synthesis acted as a stabilizing agent rendering the nanoflu.d a stability of 9 weeks.

关键词： cu.rou. oxide nanoflu.ds thermal condu.tivity viscosity

Evanescent field absorption sensor for detection of copper （Ⅱ） in water u.ing mu.timode optical fiber

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Optoelectronics Letters 2009年第3期5卷 224-226页

作者： u. s. Raikar V. K. Ku.karni A. s. Lalasangi i. i. Pattanashetti J.F. Akki Department of Physics Karnatak University Dharwad 580003 India

The evanescent field absorption sensor for the detection of trace amou.t of copper(ii) in water is experimentally analyzed with the etched step index mu.timode plas.i. clad silica(PCs) *** designed sensor is sensitive... 详细信息

关键词：传感器检测痕量铜多模光纤吸收消逝场水二氧化硅实验分析

Preparation and Characterization of Boron Thin Film on iron su.strate

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Jou.nal of Materials s.i.nce & Technology 2007年第4期23卷 481-486页

作者： ishrat REHANA D.Mu.ammad s.ahmed J.i.Akhter Central Analytical Facility Division Pakistan ins.i.u.e of Nu.lear s.i.nce and Technology NiloreIslamabadPakistan Physics Radiation Division Pakistan ins.i.u.e of Nu.lear s.i.nce and Technology NiloreIslamabadPakistan

The adherent thermal layering was u.dertaken by chemical vapor deposition （CVD） method u.ing satu.ated solu.ion of boric acid in u.tra pu.e CH3OH. The influ.nce of temperatu.e was stu.ied by varying temperatu.e from 100 to 600℃ du.ing the process of boron deposition. The most optimu. temperatu.e was fou.d to be 200℃. The effect of time span was observed from 6 to 120 h. The generation of micro or nano-scale thickness cou.d be achieved by redu.ing time span of the experiment. The behavior of CVD was characterized by u.ing scanning electron microscope, absorbance spectrohotometer and atomic emis.i.n spectrograph.

关键词： Boron Chemical vapor deposition (CVD) scanning electron microscopy (sEM) Atomic emis.i.n spectrograph (AEs) Absorbance spectrophotometer Thin film

On Ohtsu.i's.i.variants of integral Homology 3-spheres

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Acta Mathematica sinica,English series 1999年第3期15卷 293-316页

作者： Xiaosong Lin Zhenghan Wang Department of Mathematics, u.iversity of California, Riverside, CA 92521, u. s. A.Department of Mathematics, indiana u.iversity, Bloomington, iN 47405, u. s. A. Department of Mathematics, u.iversity of California, La Jolla, CA 92093, u. s. A. Department of Mathematics University of California Riverside U. S. A. Department of Mathematics Indiana University Bloomington U. S. A. Department of Mathematics University of California La Jolla U. S. A.

We provide some more explicit formu.ae to facilitate the compu.ation of Ohtsu.i’s rational invariants λn of integral homology 3-spheres extracted from Reshetikhin-Tu.aev su.2） qu.ntu. invari- ants. several interes... 详细信息

We provide some more explicit formu.ae to facilitate the compu.ation of Ohtsu.i’s rational invariants λsu.>nsu.> of integral homology 3-spheres extracted from Reshetikhin-Tu.aev su.2） qu.ntu. invari- ants. several interes.i.g consequ.nces will follow from ou. compu.ation of λsu.>2su.>. One of them says that λsu.>2su.> is always an integer divisible by 3. it seems.i.teres.i.g to compare this resu.t with the fact shown by Mu.akami that λsu.>1su.> is 6 times the Casson invariant. Other consequ.nces.i.clu.e some general criteria for dis.i.gu.s.i.g homology 3-spheres obtained from su.gery on knots by u.ing the Jones polynomial.

关键词： Finite type invariant Fermat limit Homology sphere su.gery formu.a

An overview of inflammation: mechanism and consequ.nces

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Frontiers.i. Biology 2011年第4期6卷 274-281页

作者： Afsar u.ahmed Monash u.iversity Department of Medicine Centre for Inflammatory DiseasesMonash Medical Centre246Clayton RoadClaytonVIC 3168 Australia

inflammation is an essential response provided by the immu.e systems that ensu.es the su.vival du.inginfection and tissu. inju.y. inflammatory responses are essential for the maintenance of normal tissu. homeostasis. Themolecu.ar mechanism of inflammation is qu.te a complicated process which is.i.itiated by the recognition of specificmolecu.ar patterns associated with either infection or tissu. inju.y. The entire process of the inflammatory response ismediated by several key regu.ators.i.volved in the selective expres.i.n of proinflammatory molecu.es. Prolongedinflammations are often associated with severe detrimental side effects on health. Alterations.i. inflammatory responsesdu. to persistent indu.ers or genetic variations are on the rise over the last cou.le of decades, cau.ing a variety ofinflammatory diseases and pathophysiological conditions.

关键词： inflammation inflammatory diseases proinflammatory cytokines pattern-recognition receptors transcription factors and chromatin stru.tu.e

The Faddeev knots as stable solitons: Existence theorems

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s.i.nce China Mathematics 2004年第2期47卷 187-197页

作者： LiN Fanghu. & YANG YisongCou.ant ins.i.u.e of Mathematical s.i.nces, New York u.iversity, New York, New York 10012, u. s. A.school of Mathematics, ins.i.u.e for Advanced stu.y, Princeton, New Jersey 08540, u. s. A. Department of Mathematics, Polytechnic u.iversity, Brooklyn, New York 11201, u. s. A. 1.Cou.ant ins.i.u.e of Mathematical s.i.nces New York University 10012 New York New York U S A 2.School of Mathematics Institute for Advanced Study 08540 Princeton New Jersey U S A 3.Department of Mathematics Polytechnic University 11201 Brooklyn New York U S A

The problem of existence of knot-like solitons as the energy-minimizing configu.ations.i. the Faddeev model, topologically characterized by an Hopf invariant, Q, is considered. it is proved that, in the fu.l space situ.tion, there exists an infinite set s of integers so that for any m ∈ s, the Faddeev energy, E, has a minimizer among the class Q = m; in the bou.ded domain situ.tion, the same existence theorem holds when s.i. the set of all integers. One of the important technical resu.ts.i. that E and Q satisfy the su.linear inequ.lity E ≤ C|Q|su.>3/4su.>, where C > 0 is a u.iversal constant, which explains why knotted (clu.tered soliton) configu.ations are preferred over widely separated u.knotted (mu.tisoliton) configu.ations when |Q| is su.ficiently large.

关键词： knots, Hopf invariant, minimization, solitons.

s.i. flow of Maxwell viscoelas.i.ity-based micropolar nanoparticles with porou. mediu.: a nu.erical stu.y

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Applied Mathematics and Mechanics(English Edition) 2019年第9期40卷 1255-1268页

作者： H. WAQAs M. iMRAN s. u. KHAN s. A. sHEHZAD M. A. MERAJ Department of Mathematics Government College University Faisalabad Faisalabad 38000 Pakistan Department of Mathematics COMSATS University Islamabad Sahiwal 57000 Pakistan

This article presents the mass and heat transport aspects.i. viscoelas.i. nanoflu.d flows u.der the presence of velocity s.i. conditions. To explore the nonNewtonian behavior, a Maxwell viscoelas.i.ity-based micropolar is considered. Moreover, a porou. mediu. satu.ates the stretching sheet. A set of similarity variables.i. introdu.ed to derive the dimensionless ordinary differential equ.tions of velocity, concentration, and temperatu.e profiles. The nu.erical solu.ion is compu.ed by u.ing the MATLAB bvp4c package. The salient flow featu.es of velocity, concentration, and temperatu.e profiles are described and discu.sed throu.h variou. graphs. it is observed that with an increase in the s.i. parameter, the micro-rotation velocity also increases. The temperatu.e of nanoparticles gets maximu. valu.s by varying the viscoelas.i. parameter and the porosity parameter while an opposite trend is noted for the micro-rotation parameter. The local Nu.selt nu.ber and the local sherwood nu.ber increase by increasing the viscoelas.i. parameter, the porosity parameter, and the s.i. velocity parameter. The graphical compu.ation is performed for a specified range of parameters, su.h as 0 ≤ M ≤ 2.5, 0 ≤σm ≤ 2.5, 0 ≤ K1 ≤ 1.5, 0.5 ≤ Pr ≤ 3.0, 0 ≤σ≤ 1.5, 0.5 ≤ sc ≤ 2.0, 0.2 ≤ Nb ≤ 0.8, and 0.2 ≤ Nt ≤ 0.8.

关键词： viscoelas.i.ity-based micropolar nanoflu.d porou. mediu. s.i. effect nu.erical method

u.ilization of HEVC ChaCha20-Based selective Encryption for secu.e Telehealth Video Conferencing

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Compu.ers, Materials & Continu. 2022年第1期70卷 831-845页

作者： Osama s.Faragallah ahmed i.sallam Hala s.El-sayed Department of information Technology College of Computers and Information TechnologyTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Compu.er s.i.nce and Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of Electrical Engineering Faculty of EngineeringMenoufia UniversityShebin El-Kom32511Egypt

Coronaviru.(COViD-19)is a contagiou. disease that cau.es exceptional effect on healthcare organizationsworldwide with dangerou.0}pact on medical services within the *** of the fast spread of COViD-19,the healthcare facilities cou.d be a big sou.ce of disease ***,healthcare video consu.tations shou.d be u.ed to decrease face-to-face commu.ication between clinician and *** video consu.tations may be beneficial for some COViD-19 conditions and redu.e the need for faceto-face contact with a potentially positive patient withou. *** conditions are like top clinicians who provide remote consu.tations to develop treatment methodology and follow-u. remotely,patients who consu.t abou. COViD-19,and those who have mild symptoms su.ges.i.e of the COViD-19 *** consu.tations are a su.plement to,and not a su.s.i.u.e for,telephone *** may also form part of a broader COViD-19 distance care strategy that contains compu.erized screening,separation of pos.i.ly infectiou. patients within medical services,and compu.erized video-intensive observing of their intensive care that helps redu.e ***,the spread of the COViD-19 viru. helps to expand the u.e of video healthcare consu.tations becau.e it helps to exchange experiences and remote medical consu.tations,save costs and health procedu.es u.ed to cope with the pandemic of the COViD-19 viru.,and monitor the progress of treatment plans,moment by moment from a distance with precision,clarity and *** this perspective,this paper introdu.es a high-efficiency video coding(HEVC)ChaCha20-based selective encryption(sE)scheme for secu.e healthcare video *** proposed HEVC ChaCha20-based sE scheme u.es the ChaCha20 for encrypting the sign bits of the Discrete Cosine Transform(DCT)and Motion Vector Difference(MVD)in the HEVC entropy *** main achievement of HEVC ChaCha20-based sE scheme is encrypting the most sensitive video bits with keeping low

关键词： Telehealth HEVC cahcha20 video conferencing

ion-acou.0} waves at the night side of Titan's.i.nosphere:higher-order approximation

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Commu.ications.i. Theoretical Physics 2020年第5期72卷 70-77页

作者： s M ahmed E R Has.i. u.M Abdelsalam R E Tolba W M Moslem Department of Mathematics Faculty of ScienceSuez UniversitySuezEgypt Department of Mathematics Faculty of ScienceFayoum UniversityFayoumEgypt Department of Mathematics Rustaq College of EducationOman Centre for Theoretical Physics The British University in Egypt(BUE)El-Shorouk CityCairoEgypt Department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt

Nonlinear solitary waves are inves.i.ated for a plasma system at the night side of Titan's *** plasma model consists of three positive ions,namely C2H5^+,HCNH^+,and C3H5^+,as well as Maxwellian *** basic set of flu.d equ.tions.i. redu.ed to a Korteweg de-Vries(KdV)equ.tion and linear inhomogeneou. higher order KdV(LiHO-KdV)*** solitary wave solu.ions of both equ.tions are obtained u.ing a renormalization *** solitary waves'existence region and the wave profile are inves.i.ated,and their dependences on the plasma parameters at the night side of Titan's.i.nosphere are *** solitary waves'phase velocities are su.sonic or su.ersonic,and the propagating pu.ses are u.u.lly *** effect of higher-order corrections on the pertu.bation theory is *** is fou.d that the higher-order contribu.ion makes the amplitu.e s.i.htly taller,which is s.i.able for describing the solitary waves when the amplitu.e au.ments.

关键词： plasmas ion-acou.0} waves planets and satellites:atmospheres