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International Business The Challenge of Global Competition Donald A. ball, Wendell h. McCulloch, Jr., Paul L. Frantz, et al. 8th ed.

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Jian-Wei Pan:building the quantum internet

2002年

作者： Donald A. ball Wendell h. McCulloch Jr. Paul L. Frantz et al.

Includes bibliographical references and indexes.

ISBN: (纸本)0072356766

Includes bibliographical references and indexes.

关键词： International economic relations.

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National Science Review 2019年第2期6卷 374-376页

作者： Philip ball Writes for NSR from London

For many decades since its inception in the early twentieth century, quantum mechanics seemed to be an exotic and peculiarly non-intuitive kind of physics that applied to matter at the smallest scales:the laws that govern atoms, photons and subatomic particles. All our engineering,meanwhile, was dominated by the familiar rules of classical physics, in which objects have definite positions, trajectories and properties.

关键词： QKD Jian-Wei Pan:building the quantum internet NSR

Blueprints for real-world invisibility

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Frontiers of physics 2018年第5期13卷 1-2页

作者： Philip ball East Dulwich London SE22 UK.

Making objects invisible has never been easy. A seventeenth-century magic spell for growing ＂beans of invisibility＂ instructed that they should be buried with the severed head of a man who committed suicide. For h. G. Wells＇s ＂invisible man＂ in his famous 1897 novel, the process was more scientific, involving the use of mysteri- ous rays related to X-rays that would alter the refractive index of a transparent substance to match that of air.

关键词： Blueprints real-world invisibility

Influence of Zn^(2+)or Cu^(2+) on Reduction and Recalcination Behavior of Fe_2TiO_5

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Journal of Materials Science & Technology 2007年第5期23卷 697-702页

作者： M.Bahgat M.h.Khedr h.S.Abdelmaksoud CMRDI P.O.Box 87-HelwanCairoEgypt Chemistry Department Faculty of ScienceBenisuef UniversityEgypt

Fe2O3, TiO2, CuO and ZnO powders were mixed according to the formula of （1-x）TiO2 xCuO-Fe2O3 or （1-x）TiO2 xZnO-Fe2O3 （x=0, 0.2 0.4, 0.6, 0.8, 1）, and well ball-milled with h2O for 3 h to ensure homogeneity of the powdered solids, then fired at 1200℃ for 4 h. The fired samples were reduced at 500℃ with hydrogen gas. The reduced samples were subjected to recalcination at 500℃ in CO2 atmosphere. Both of fired, reduced and calcined samples were characterized by X-ray diffraction, vibrating sample magnetometry, reflected light microscopy and scanning electron microscopy. Different phases were formed after firing of Cu^＋2 or Zn^2＋ substituted Fe2TiO5. Magnetization （Bs） of the formed phases after firing are very low corresponding to diluted magnetic semiconductors （DMS） and increases with increasing the substituted cations （Cu^＋2 or Zn^2＋）. The reduction of the fired samples enhanced the Bs values whereas the reducibility increases with increasing the Cu^＋2 or Zn^2＋ content. Samples show different tendency toward CO2 decomposition which is very important for environmental minimization for CO2.

关键词： Nanosized ferrite Titanate Reduction Magnetic properties Reduction-recalcin-ation CO2 decomposition

Electrical and dielectric properties of Na_(1/2)La_(1/2)Cu_3Ti_4O_(12) ceramics prepared by high energy ball-milling and conventional sintering

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Chinese Physics B 2016年第12期25卷 474-480页

作者： h Mahfoz Kotb Mohamad M Ahmad Department of Physics College of ScienceKing Faisal University Department of Physics Faculty of ScienceAssiut University

We report on the measurements of the electrical and dielectric properties of Na1/2La1/2Cu3Ti4O12 （NLCTO） ce- ramics prepared by high energy ball-milling and conventional sintering without any calcination steps. The x-ray powder diffraction analysis shows that pure perovskite-like CCTO phase is obtained after sintering at 1025 ℃-1075 ℃. higher sintering temperatures result in multi-phase ceramics due to thermal decomposition. Scanning electron microscope observations reveal that the grain size is in a range of - 3 μm-5 μm for these ceramics. Impedance spectroscopy measurements performed in a wide frequency range （1 hz-10 Mhz） and at various temperatures （120 K-470 K） are used to study the dielectric and electrical properties of NLCTO ceramics. A good compromise between high ε′ （5.7 ×10^3 and 4.1 × 10^3 at 1.1 khz and 96 khz, respectively） and low tan δ （0.161 and 0.126 at 1.1 khz and 96 khz, respectively） is obtained for the ceramic sintered at 1050 ℃. The observed high dielectric constant behavior is explained in terms of the internal barrier layer capacitance effect.

关键词： ceramics sintering dielectric loss and relaxation electrical

Novel spin glasses by mechanical milling

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Science China(Technological Sciences) 1996年第4期39卷 354-368页

作者：周国富 h.Bakker van der Waals-Zeeman Laboratorium Universiteit van AmsterdamValckenierstraat 65.1018 XE Amsterdam.Netherlands Present address: Philips Research Laboratories. Prof Holstlaan 4. 5656 AA Eindhoventhe Netherlands. van der Waals-Zeeman Laboratorium Universiteit van AmsterdamValckenierstraat 65.1018 XE Amsterdam.Netherlands

Novel spin-glass alloys were synthesized by milling intermetallic compounds and also by milling mixtures of crystalline elemental powder in a high-energy ball *** glass behaviour was found in amorphous Co2Ge,which was amorphised by milling in mechanically disordered crystalline GdAl2 in ball-milled crystalline and amorphous CoZr,and in mechanically alloyed Co-Cu,which formed a supersaturated *** *** these materials are binary alloys and tlie concentration of the magnetic element is high,which makes them novel types of spin *** is shown that ball milling may not only lead to structural metallic glasses,but can also generate the magnetic pendant of a structural glass,namely the spin glass.

关键词： spin glasses disorder phase transformation ball milling intermetallic compounds.

Specific interaction of hepatitis C virus glycoproteins with mannan binding lectin inhibits virus entry

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Protein & Cell 2010年第7期1卷 664-674页

作者： Kristelle S.Brown Michael J.Keogh Ania M.Owsianka Richard Adair Arvind h.Patel James N.Arnold Jonathan K.ball Robert B.Sim Alexander W.Tarr Timothy P.hickling Institute of Infection Immunity and InflammationSchool of Molecular Medical SciencesThe University of NottinghamQueen’s Medical CentreNottinghamNG72UHUK The Medical Research Council-University of Glasgow Centre for Virus Research University of GlasgowChurch StreetGlasgowG115JRUK MRC Immunochemistry Unit Department of BiochemistryUniversity of OxfordOX13QUUK Present address:Vitrology Biotech 5 South AvenueClydebank Business ParkGlasgowG812LGUK Present address:Pfizer Technologies Ltd. Ramsgate RoadSandwichKentCT139NJUK

Mannan-binding lectin(MBL)is a soluble innate immune protein that binds to glycosylated *** acts as an opsonin and activates complement,contributing to the destruction and clearance of infecting *** C virus(hCV)encodes two envelope glycoproteins E1 and E2,expressed as non-covalent E1/E2 heterodimers in the viral envelope.E1 and E2 are potential ligands for *** we describe an analysis of the interaction between hCV and MBL using recombinant soluble E2 ectodomain fragment,the full-length E1/E2 heterodimer,expressed in vitro,and assess the effect of this interaction on virus entry.A binding assay using antibody capture of full length E1/E2 heterodimers was used to demonstrate calcium dependent,saturating binding of MBL to hCV *** with various saccharides further confirmed that the interaction was via the lectin domain of *** binds to E1/E2 representing a broad range of virus *** was shown to neutralize the entry into huh-7 cells of hCV pseudoparticles(hCVpp)bearing E1/E2 from a wide range of *** were neutralized to varying *** was also shown to neutralize an authentic cell culture infectious virus,strain JFh-1(hCVcc).Furthermore,binding of MBL to E1/E2 was able to activate the complement system via MBL-associated serine protease *** conclusion,MBL interacts directly with hCV glycoproteins,which are present on the surface of the virion,resulting in neutralization of hCV particles.

关键词： hepatitis C virus neutralization mannose binding lectin chronic viral infection

Preparation of Pure Copper Powder from Acidic Copper Chloride Waste Etchant

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Journal of Materials Science & Technology 2008年第1期24卷 141-142页

作者： h.S.hong M.S.Kong J.K.Ghu J.K.Lee h.G.Suk Plant Engineering Center.Institute for Advanced Engineering Yongin 449-863 Korea Dept. of Advanced Mater. Eng. Korea Polytechnic University Shihung 429-793 Korea Nano-surface Treat. Tech. Team Korea Inst. of Industrial Technology Incheon 463-130 Korea Dept. of Mater. and Met. Eng. Kangwon National University Samcheok 245-711 Korea

The method for the recycling of copper from copper chloride solution was developed. This process consists of extraction of copper, purification and particle size reduction. In the first step, reductive metal scraps were added to acidic copper chloride waste enchants produced in the PCB industry to obtain copper powder. Composition analysis showed that this powder contained impurities such as Fe, Ni, and water. So, drying and purification were carried out by using microwave and a centrifugal separator. Thereby the copper powder had a purity of higher than 99% and spherical form in morphology. The copper powder size was decreased by ball milling.

关键词： Copper chloride liquid waste Printed circuit board (PCB), Liquid waste highpurity copper powder

Microstructure and Properties of WB_(2)/Cr Multilayer Films with Different Bilayer Numbers Deposited by Magnetron Sputtering

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Acta Metallurgica Sinica(English Letters) 2022年第4期35卷 693-702页

作者： W.B.Shi Y.M.Liu W.h.Li T.Li h.Lei J.Gong C.Sun Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China College of Materials Science and Engineering Xi'an Shiyou UniversityXi'an 710065China

The influence of the bilayer number on the microstructure,mechanical properties,adhesion strength and tribological behaviors of the WB_(2)/Cr multilayer films was systematically investigated in the present *** groups of WB_(2)/Cr films with the same modulation ratio were synthesized by magnetron sputtering *** crystalline structure of the films was determined by X-ray *** morphologies and the microstructure of the films were observed by scanning electron microscopy,atomic force microscopy and transmission electron ***,Nano indenter,scratch tester and ball-on-disc tribometer were used to evaluate the mechanical and tribological *** bilayer numbers varied from 5 to 40,the hardness increased first and then decreased with the maximum hardness of 33.9 GPa when the bilayer number is *** h/E^(*)and h^(3)/E^(*2)values calculated to evaluate the fracture toughness showed the similar changing trend with *** adhesion strength reached the maximum of 67 N when the bilayer number is *** surface roughness and friction coefficient decreased with increasing bilayer *** wear mechanism was also investigated,and the results suggested that the multilayer film with bilayer number of 30 exhibited the best wear resistance(1.78×10^(–7)mm^(3)/Nm),benefiting from the contribution of high hardness,fracture toughness and adhesion strength.

关键词： WB_(2)/Cr multilayer Magnetron sputtering Bilayer number Tribological behavior