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Biblioteca Hispanica : List of Gentlemen Who Compose the Spanish S...

By: Madrid
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The Journal of Chemical Physics : The multiconfigurational-referen...

By: Jirí Czernek and Oldrich Živný

Description: The multiconfigurational-reference internally contracted configuration interaction (MRCI)/aug-cc-pVQZ-based computational protocol was employed to search for the minima of the potential energy surface of the low-lying singlet and triplet electronic states of the trifluoride anion F3− in the D∞h, C∞v, C2v, and Cs symmetry groups. The 2 bound state was located (re = 1.8777 Å and θ = 103.39°), which was predicted to lie less than 1 eV above the X g+ ground stat...

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Applied Physics Letters : Efficient readout of micromechanical res...

By: W. J. Venstra and H. S. J. van der Zant

Description: We present a method for efficient spectral readout of mechanical resonator arrays in dissipative environments. Magnetomotive drive and detection are used to drive double clamped resonators in the nonlinear regime. Resonators with almost identical resonance frequencies can be tracked individually by sweeping the drive power. Measurements are performed at room temperature and atmospheric pressure. These conditions enable application in high throughput resonant sensor arrays.

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Journal of Applied Physics : Luminescence study of Eu3+ doped GdVO...

By: N. Shanta Singh, R. S. Ningthoujam, L. Romila Devi, N. Yaiphaba, V. Sudarsan et al

Description: Nanoparticles of GdVO4 doped with Eu3+ and core/shell of GdVO4:Eu3+/GdVO4 are prepared by urea hydrolysis method using ethylene glycol as capping agent as well as reaction medium at 130 °C. Unit cell volume increases when GdVO4 is doped with Eu3+ indicating the substitution of Gd3+ lattice sites by Eu3+. From luminescence study, it is confirmed that there is no particle size effect on emission positions of Eu3+. Optimum luminescence intensity is found to be ...

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Biblioteca Hispanica : Course Methodical Popular Notions of Natura...

By: Jose Maria Paniagua
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Review of Scientific Instruments : A new tensile stage for in situ...

By: Kalin I. Dragnevski, Trevor W. Fairhead, Rik Balsod, and Athene M. Donald

Description: We have developed a novel tensile stage that can be used for in situ electron microscopy examination of the mechanical properties of “superelastic” materials. In our stage, one of the specimen clamps is replaced by a cylindrical roller, which when driven by a motor can easily stretch (“roll on”) any specimen irrespective of its plastic properties. We have used the so-called Roll-o-meter in the study of the tensile behavior of two different film formed latex ...

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Physics of Plasmas : Global particle-in-cell simulations of Alfvén...

By: Alexey Mishchenko, Roman Hatzky, and Axel Könies

Description: Global linear gyrokinetic particle-in-cell (PIC) simulations of electromagnetic modes in pinch and tokamak geometries are reported. The global Alfvén eigenmode, the mirror Alfvén eigenmode, the toroidal Alfvén eigenmode, and the kinetic ballooning modes have been simulated. All plasma species have been treated kinetically (i.e., no hybrid fluid-kinetic or reduced-kinetic model has been applied). The main intention of the paper is to demonstrate that the glob...

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Review of Scientific Instruments : Visual observation and quantita...

By: L. Zhao, X. Chen, and C. K. Ong

Description: We have set up a two-dimensional spatial field mapping system to measure graphically the quasi-free-space electromagnetic wave in a parallel plate waveguide. Our apparatus illustrates a potential application in characterizing the microwave absorbing materials. From the measured mappings of the microwave field, the visualization of spatial physical process and quantitative characterization of reflectivity coefficients can be achieved. This simple apparatus ha...

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Journal of Applied Physics : An atomistic-based correction of the ...

By: S. Rodríguez-Bolívar, F. M. Gómez-Campos, and J. E. Carceller

Description: In this work, we propose a correction to the effective mass approach (EMA) to be used in Si quantum dot simulations. This correction tries to connect the different ways of modeling quantum dots within tight binding (considering the actual positions of the atoms and using additional atoms to passivate the surfaces) with those within the EMA, adapting the size of the simulated quantum dots to take the difference into account. With this aim, we implemented a 6×...

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Journal of Mathematical Physics : Classical limit for semirelativi...

By: Gonca L. Aki, Peter A. Markowich, and Christof Sparber

Description: We consider the three-dimensional semirelativistic Hartree model for fast quantum mechanical particles moving in a self-consistent field. Under appropriate assumptions on the initial density matrix as a (fully) mixed quantum state we prove by using Wigner transformation techniques that its classical limit yields the well known relativistic Vlasov–Poisson system. The result holds for the case of attractive and repulsive mean-field interactions, with an additi...

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Applied Physics Letters : The enhancement of ZnO nanowalls photoco...

By: F. Fang, D. X. Zhao, B. H. Li, Z. Z. Zhang, J. Y. Zhang et al

Description: 10 nm sized hexagonal CdS nanoparticles were decorated on the surface of well-aligned ZnO nanowall through a facile hydrothermal approach. The effects of CdS-cap layer on the optical and photoelectrical properties of ZnO nanowalls have been studied. It was found the CdS acted not only as a passivation layer to suppress the detrimental surface states of ZnO nanowalls, which reduced the deep-level emissions, but also as an interfacial carrier transport layer t...

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Biblioteca Hispanica : Testing of a General Plan of Natural Scienc...

By: Francisco Carbonell and Bravo
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Journal of Applied Physics : Ultraviolet light in glow discharges

By: Loic Ledernez, Fethi Olcaytug, Hirotsugu Yasuda, and Gerald Urban

Description: The use of ultraviolet light has prevailed in investigation of gas breakdown phenomena since Townsend developed the model of gas breakdown discharge carrying his name because ultraviolet light creates the supposedly necessary electrons in the interelectrode space. However, the ultraviolet light influences the gas breakdown characteristics. Therefore, the extent of the influence of the ultraviolet light on the prebreakdown current, the breakdown current, the ...

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Biblioteca Hispanica : Movement Nature

By: Ramon Bercial
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Civil War and Civil War Related Prints : Col B Grierson, 6Th Ill C...

By: Michael Cáceres and Giron
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Journal of Applied Physics : Growth of di-indenoperylene single cr...

By: Xue Na Zhang, Esther Barrena, Dimas Garcia de Oteyza, Emerson De Souza, and Helmut Dosch

Description: We report a combined atomic force microscopy/x-ray diffraction study of the growth and dewetting of the organic molecule di-indenoperylene (DIP) on SiO2 surfaces that have been functionalized with an amino-terminated self-assembled monolayer of 3-aminopropyltriethoxysilane [APS, (CH3CH2O)3Si(CH2)3NH2]. We disclose a transition of DIP thin films from two-dimensional to three-dimensional growth at 80 °C, which is associated with a change in the surface morphol...

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Review of Scientific Instruments : A new spin-polarized photoemiss...

By: Taichi Okuda, Yasuo Takeichi, Yuuki Maeda, Ayumi Harasawa, Iwao Matsuda et al

Description: A new spin- and angle-resolved photoemission spectrometer was developed adopting the very-low-energy-electron-diffraction (VLEED)-type spin polarimeter. The Fe(001)p(1×1)–O film grown on MgO(001) crystal for the VLEED target yields significantly high spin-resolving power, the effective Sherman function of 0.40±0.02, with long lifetime and stability compared to the conventional Fe(001) target. Under the favor of high resolving power, approximately 100 times h...

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Applied Physics Letters : Chemical patterning of Ag(111): Spatiall...

By: S. Günther, R. Reichelt, J. Wintterlin, A. Barinov, T. O. Mentes et al

Description: Low energy electron irradiation of a Ag(111) surface during NO2 adsorption at 300 K induces formation of Ag oxide. Using a spatially confined electron beam, small Ag2O spots could be grown with a sharp, ∼ 100 nm wide, boundary to the nonirradiated metallic surface. Since the structure size will mainly depend on the sharpness of the irradiating electron beam, this process has the potential of a single step nanostructuring process. Temperature treatment offers...

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Physics of Plasmas : Nonlinear stationary solutions of the Wigner ...

By: F. Haas and P. K. Shukla

Description: Exact nonlinear stationary solutions of the one-dimensional Wigner and Wigner–Poisson equations in the terms of the Wigner functions that depend not only on the energy but also on position are presented. In this way, the Bernstein–Greene–Kruskal modes of the classical plasma are adapted for the quantum formalism in the phase space. The solutions are constructed for the case of a quartic oscillator potential, as well as for the self-consistent Wigner–Poisson ...

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Chaos : Community structures and role detection in music networks

By: T. Teitelbaum, P. Balenzuela, P. Cano, and Javier M. Buldú

Description: We analyze the existence of community structures in two different social networks using data obtained from similarity and collaborative features between musical artists. Our analysis reveals some characteristic organizational patterns and provides information about the driving forces behind the growth of the networks. In the similarity network, we find a strong correlation between clusters of artists and musical genres. On the other hand, the collaboration n...

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