Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
home > search

Now showing items 81 - 96 of 1618

  • Scheduling data protection operations based on data activity

    There is disclosed a method, a system, and a computer program product suitable for backing up data on a computer system. In at least one embodiment, the method comprises monitoring activity in connection with a plurality of data objects. The method also comprises determining a level of activity in connection with each data object. The method further comprises evaluating the level of activity in connection with each data object. The method still further comprises scheduling a data protection process in connection with at least one of the data objects based on the said evaluation.
    Download Collect
  • Fabrication method of TiO2–SiO2 hybrid capsules and their UV-protective property

    Yang Zhang   Yanfei Wu   Min Chen   Limin Wu  

    This article presents a novel miniemulsion-combined sol-gel process to fabricate TiO 2-SiO 2 hybrid capsules. In this approach, the oil phase composed of acetylacetone (Acac) modified titanium (IV) butoxide (TBT), dimethyl benzene (DB) and hexadecane (HD) is confined in the miniemulsion droplet microreactors with the aid of a cationic emulsifier hexadecyltrimethylammonium bromide (CTAB). Then, a silica layer was coated onto the miniemulsion droplets by the co-condensation of amino-silane and tetraethyl silicate (TEOS). At the same time, TBT in the miniemulsion droplets diffused to the O/W interface and then initiated the sol-gel reaction, hence TiO 2-SiO 2 hybrid shell with TiO 2 colloids loading inside formed. TEM, FTIR, EDX and XPS indicated that TiO 2-SiO 2 hybrids possess hollow-like structure, with small titania colloids loaded in the titania/silica hybrid shells. Some influencing parameters, such as the concentrations of TBT in the oil droplet, the content of amino-silane in the silica precursor, on the morphology of the TiO 2-SiO 2 hybrid capsules were investigated. UV-vis spectra and dye degradation experiments showed that the polyurethane films doped with these hybrid colloids had a very good UV-protective property. [All rights reserved Elsevier].
    Download Collect
  • Spatial working memory load impairs manual but not saccadic inhibition of return

    Yang Zhang   Ming Zhang  

    Download Collect
  • A fictitious domain method for acoustic wave propagation problems

    Yang Zhang  

    Based on the essence of Lagrange multiplier, a fictitious domain method, especially for acoustic wave propagation problems in exterior domain, is proposed, where all computational tasks are carried out in an auxiliary simply shaped domain, and the original domain is embedded into it. The simplicity of the auxiliary domain enables us to use uniform meshes to construct the finite element space and form a special structured stiffness matrix. Finally, the stability, convergence and error estimates are obtained for the numerical schemes.
    Download Collect
  • A fictitious domain method for acoustic wave propagation problems

    Yang Zhang  

    Based on the essence of Lagrange multiplier, a fictitious domain method, especially for acoustic wave propagation problems in exterior domain, is proposed, where all computational tasks are carried out in an auxiliary simply shaped domain, and the original domain is embedded into it. The simplicity of the auxiliary domain enables us to use uniform meshes to construct the finite element space and form a special structured stiffness matrix. Finally, the stability, convergence and error estimates are obtained for the numerical schemes.
    Download Collect
  • Optical conductivity of cuprates from Yang–Rice–Zhang ansatz: Comparison with experiment

    Singh   Navinder  

    We report the results of a theoretical investigation on charge dynamics in weakly coupled CuO2 planes of the cuprate Ca2-xNaxCuO2Cl2 in the pseudogap regime by using the theory of Yang, Rice, and Zhang (YRZ) [1]. With a detailed numerical analysis at various impurity scattering rates (gamma(imp)), we observe that YRZ model is not able to reproduce (in magnitude) the experimentally observed frequency evolution of optical conductivity at a fixed doping level. Further, to analyze the doping evolution, we have done a detailed comparison of calculated YRZ conductivity with the experimental one using Two-Component Drude-Lorentz model. We find that YRZ model is capable of reproducing (qualitatively) the experimentally observed doping evolution of Drude processes (low energy scale) and processes at the pseudogap (intermediate energy scale). We also discuss physical reasons of the discrepancy seen in magnitudes. (C) 2014 Elsevier B.V. All rights reserved.
    Download Collect
  • Piperazinyl pyrimidine derivatives, preparation method and use thereof

    Provided are piperazinyl pyrimidine derivatives of formula I having CCR4 antagonism, and the preparation method, pharmaceutical composition and use thereof in the preparation of a medicament. The medicament is useful for the treatment and prevention of CCR4-related diseases.
    Download Collect
  • Method and device for setting status of application

    A method for a device to set a status of an application, including: acquiring status setting permission information of the application; determining if the acquired status setting permission information indicates that it is permitted to set the status of the application; and setting the status of the application as an inactive status, if it is determined that the acquired status setting permission information indicates that it is permitted to set the status of the application.
    Download Collect
  • Electroplating an yttrium-containing coating on a chamber component

    A method of forming a component capable of being exposed to a plasma in a process chamber comprises forming a structure comprising a surface and electroplating yttrium, and optionally aluminum or zirconium, onto the surface. Thereafter, the electroplated layer can be annealed to oxide the yttrium and other electroplated species.
    Download Collect
  • Ultrasonic brazing of aluminum alloy and aluminum matrix composite

    A method of ultrasonic brazing metal matrix composite, which forms a reinforced composite bond without filling welding wire with reinforcement or adding alloy element to generate ceramic phase, includes the steps of setting a filler metal; introducing ultrasonic vibration to braze in air; dissolving the base materials, and introducing ultrasonic wave again. The method performs the aluminum brazing at low temperature. The periodic time of brazing is shorter and the cost is lower than the conventional brazing methods. The strength, service temperature and dimensional stability of the joint are close to the base article.
    Download Collect
  • Effect of MoO3-doped PTCDA as buffer layer on the performance of CuPc/C60 solar cells

    Min Guan   Guohua Cao   Xinbo Chu   Yang Zhang   Xingfang Liu and Yiping Zeng  

    The long-term performance stability of organic solar cells (OSCs), as well as their high power-conversion efficiency, is necessary for their practical use. A stable OSC with the structure of ITO/buffer/donor/acceptor/cathode is presented. A thin layer of MoO3-doped PTCDA (molar ratio 1:1) is adopted as the buffer in CuPc/C60 organic heterojunction photovoltaic (PV) solar cells, resulting in four to five times longer lifetime. The CT complex of buffer layer plays a decisive role in improving the stability and abnormal efficiency changes.
    Download Collect
  • Kallikrein-binding protein inhibits LPS-induced TNF- by upregulating SOCS3 expression

    Zhiyu Dai   Lei Lu   Zhonghan Yang   Yuling Mao   Juling Lu   Cen Li   Weiwei Qi   Yifei Chen   Yachao Yao   Lei Li   Shaobo Chen   Yang Zhang   Weibin Cai   Xia Yang and Guoquan Gao  

    Kallikrein-binding protein (KBP) was previously identified as a serpin family member with specific inhibitory effect on tissue kallikrein and angiogenesis, while there is little knowledge about the effects on inflammation. The aim of this study is to investigate whether KBP can suppress LPS-induced inflammatory process. Our results showed that both recombinant KBP and KBP overexpression inhibited LPS-stimulated TNF- transcription and translation in macrophage cell line RAW264.7 and primary macrophages. Furthermore, KBP treatment protected mice from endotoxin shock and repressed serum TNF- production, increasing survival rate of mice from 10% to 50% when compared to LPS alone. Moreover, qPCR and Western blot analysis demonstrated that both suppressor of cytokine signaling 3 (SOCS3) transcription and translation were induced by KBP treatment in the present of LPS. RNA interference assay and luciferase assay showed that SOCS3 was responsible for the down-regulation of TNF- by KBP, rather than NF-κB subunit p65 and β-catenin. Therefore, we demonstrated that KBP suppressed LPS-induced TNF- production via upregulating SOCS3 expression. These results present the protective effects of KBP on LPS-induced inflammation and provide novel information for the anti-inflammation mechanism. J. Cell. Biochem. 114: 1020–1028, 2013.
    Download Collect
  • The exact solution of a system of quaternion matrix equations involving η-Hermicity

    Yang Zhang   Rong-Hao Wang  

    A1X=C1,A2Y=C2,ZB2=D2,A3X+(A3X)η?B3YB3η?C3ZC3η?D3
    Download Collect
  • Negative Differential Resistance in ZnO Nanowires Bridging Two Metallic Electrodes

    Yang Zhang   Ching-Ting Lee  

    The electrical transport through nanoscale contacts of ZnO nanowires bridging the interdigitated Au electrodes shows the negative differential resistance (NDR) effect. The NDR peaks strongly depend on the starting sweep voltage. The origin of NDR through nanoscale contacts between ZnO nanowires and metal electrodes is the electron charging and discharging of the parasitic capacitor due to the weak contact, rather than the conventional resonant tunneling mechanism.
    Download Collect
  • Method and apparatus for tracking a laboratory animal location and movement

    A system for tracking the laboratory animal position and movement in a walled enclosure or cage for observation and evaluation is disclosed. The system consists of a plate placed on the bottom of the cage whereon multiple electrodes are configured as column-row two-dimensional electrode array, an electronic circuit detecting and measuring the capacitance between said electrodes, and a microprocessor determining the animal's location. The electronic circuit repeatedly measures the capacitance between the electrodes in a sequential manner. The animal's location and movement is determined by detecting the changes in capacitance on said plate.
    Download Collect
  • High-Sensitivity Distributed Bragg Reflector Fiber Laser Displacement Sensor

    Yang Zhang   Bai-Ou Guan  

    A high-sensitivity displacement sensor based on the integration of a dual polarization distributed Bragg reflector fiber laser with cantilever beam is demonstrated. The cantilever beam converts the displacement into a transverse force onto the fiber laser which results in a modulation in the fiber birefringence and hence the beat frequency of the laser. A sensitivity of 0.402 GHz/mm is implemented. The sensitivity dependence on the parameters of the transducer is investigated.
    Download Collect
1 2 3 4 5 6 7 8 9 10

Contact

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

Submit Feedback