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Journal of Applied Physics : Multiferroic properties of Ni0.5Zn0.5...

By: Hongfang Zhang, Siu Wing Or, and Helen Lai Wa Chan

Description: We present a powder-in-sol precursor hybrid processing route to synthesize dense, homogenous, and fine-grained Ni0.5Zn0.5Fe2O4–Pb(Zr0.53Ti0.47)O3 (NZFO–PZT) multiferroic ceramic composites and report their ferromagnetic-ferroelectric characteristics. Nanosized NZFO ferromagnetic powders are dispersed into PZT ferroelectric sol-gel precursor and uniformly distributed slurry is prepared by ball-milling mixing of the powder-precursor suspension prior to be sint...

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Physics of Plasmas : A new fast reconnection model in a collisionl...

By: David Tsiklauri

Description: Based on the first principles [i.e., (i) by balancing the magnetic field advection with the term containing electron pressure tensor nongyrotropic components in the generalized Ohm’s law; (ii) using the conservation of mass; and (iii) assuming that the weak magnetic field region width, where electron meandering motion supports electron pressure tensor off-diagonal (nongyrotropic) components, is of the order of electron Larmor radius] a simple model of magnet...

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Journal of Applied Physics : N/I buffer layer for substrate microc...

By: T. Söderström, F.-J. Haug, V. Terrazzoni-Daudrix, X. Niquille, M. Python et al

Description: The influence of the substrate surface morphology on the performance of microcrystalline silicon solar cells in the substrate or n-i-p (nip) configuration is studied in this paper. The experiments are carried out on glass substrates coated with naturally textured films of ZnO deposited by low pressure chemical vapor deposition which serves as backcontact and as template for the light trapping texture. The film surface morphology can be modified with a plasma...

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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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Biblioteca Hispanica : New Elements of Natural History Illustrated...

By: Ignacio Bolivar
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Biblioteca Hispanica : Industry or Physics Physics Applied to Indu...

By: Joaquin Ribera
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Chaos : Perception-action map learning in controlled multiscroll s...

By: Paolo Arena, Sebastiano De Fiore, Luigi Fortuna, and Luca Patané

Description: In this paper a new technique for action-oriented perception in robots is presented. The paper starts from exploiting the successful implementation of the basic idea that perceptual states can be embedded into chaotic attractors whose dynamical evolution can be associated with sensorial stimuli. In this way, it can be possible to encode, into the chaotic dynamics, environment-dependent patterns. These have to be suitably linked to an action, executed by the ...

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Biblioteca Hispanica : Natural and Moral History of the Indies

By: Jose De Acosta
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Journal of Applied Physics : Strain relaxation in InAs self-assemb...

By: J. F. Chen, C. H. Yang, Y. H. Wu, L. Chang, and J. Y. Chi

Description: The effect of a high N incorporation in self-assembled InAs quantum dots (QDs) is investigated by analyzing the electronic and structural properties around QD region. Capacitance-voltage profiling and admittance spectroscopy shows that N incorporation into the InAs QD layer leads to drastic carrier depletion in the QD layer and neighboring GaAs layers due to the formation of a deep defect state at 0.34–0.41 eV. The signature of this defect state is similar t...

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Review of Scientific Instruments : Development of compact size pen...

By: Basanta Kumar Das and Anurag Shyam

Description: For long-life operation, easy to mount and compact in size penning type ion sources are widely used in different fields of research such as neutron generators, material research, and surface etching. One penning type ion source has been developed in our laboratory. Applying high voltage of 2 kV between two oppositely biased electrodes and using permanent magnet of 500 gauss magnetic field along the axis, we had produced the glow discharge in the plasma regio...

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Physics of Fluids : Elastic molecular collision models for quantum...

By: Hiroaki Matsumoto

Description: Elastic molecular collision models for Monte Carlo simulation of rarefied gas flow, such as the variable hard sphere (VHS), variable soft sphere (VSS), and variable sphere (VS) molecular models, were extended to quantum mechanical scattering, and then applied to the simulation of spherical expansion of 4He. The profiles of number density, flow velocity, and parallel and perpendicular kinetic temperatures obtained with the VHS, VSS, and VS models were in good...

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Journal of Applied Physics : Effect of iron in silicon feedstock o...

By: G. Coletti, R. Kvande, V. D. Mihailetchi, L. J. Geerligs, L. Arnberg et al

Description: The effect of iron contamination in multicrystalline silicon ingots for solar cells has been investigated. Intentionally contaminated p- and n-type multicrystalline silicon ingots were grown by adding 53 ppm by weight of iron in the silicon feedstock. They are compared to reference ingots produced from nonintentionally contaminated silicon feedstock. p-type and n-type solar cell processes were applied to wafers sliced from these ingots. The as-grown minority...

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Journal of Physical and Chemical Reference Data : Wavelengths, Tra...

By: J. E. Sansonettia

Description: Energy levels, with classifications and uncertainties, have been compiled for the spectra of the neutral atom and all positive ions of sodium (Z=11). Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addition, ground states and ionization energies are listed. Where available, the hyperfine structure constants and the percentages of the leading components of the energy levels are included. For all ionization st...

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Biblioteca Hispanica : Notions of Natural History, to Reach Children

By: Jose Maria Solano and Eulate
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Journal of Mathematical Physics : On the divine clockwork: The spe...

By: Richard Durran, Andrew Neate, Aubrey Truman, and Feng-Yu Wang

Description: The correspondence limit of the atomic elliptic state in three dimensions is discussed in terms of Nelson’s stochastic mechanics. In previous work we have shown that this approach leads to a limiting Nelson diffusion, and here we discuss in detail the invariant measure for this process and show that it is concentrated on the Kepler ellipse in the plane z = 0. We then show that the limiting Nelson diffusion generator has a spectral gap; thereby proving that i...

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Physics of Plasmas : Solitary inertial Alfvén waves in dusty plasmas

By: S. Mahmood and H. Saleem

Description: Linear and nonlinear inertial Alfvén waves are studied in the presence of positively and negatively charged dust in electron-ion plasmas. The Sagdeev potential approach is employed to obtain solitary inertial Alfvén waves in such a multicomponent plasma. It is found that electron density dips are formed in the super Alfvénic region, which has behavior similar to the case of electron-ion plasmas. The amplitude of the electron density dip structure is decrease...

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Review of Scientific Instruments : A new titration system of a nov...

By: Isao Kitagawa, Hideki Tanaka, Michiya Okada, Hitoshi Kitaguchi, and Takamitsu Kohzuma

Description: A new titration system for studying protein-ligand interactions has been developed. In this system, the sample solution is circulated in the route formed by an access path in a split superconducting magnet to maintain a constant protein concentration during the titration experiments. A concentration-control procedure for the ligand/protein ratio is devised, and the ligand/protein ratio is well controlled by this apparatus.

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Applied Physics Letters : Acceleration insensitive encapsulated si...

By: C. M. Jha, J. Salvia, S. A. Chandorkar, R. Melamud, E. Kuhl et al

Description: This paper presents the acceleration sensitivity and the resulting vibration-induced phase noise of an electrostatically coupled encapsulated silicon microresonator. External vibrations can produce phase noise in microresonators by generating time-varying stress in the resonant beams. A spring mounted resonator design that reduces the induced axial stress is presented here. Measurements and simulations show that the acceleration sensitivity and the vibration...

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Journal of Applied Physics : Effect of compensation and of metalli...

By: Joris Libal, Sara Novaglia, Maurizio Acciarri, Simona Binetti, Roman Petres et al

Description: In this work we present a study of a p-type Czochralski-grown Si ingot which was grown using 10% solar grade silicon (SoG-Si). As the SoG-Si contains a relatively high concentration of impurities including phosphorus, the electrical properties of the as-grown wafers from this ingot are affected by both the compensating dopants and other impurities. Measurements of the minority charge carrier lifetime in the as-grown material reveal very low values (4–8 μs). ...

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Physics of Plasmas : Spectroscopic study on rotational and vibrati...

By: Xiao-Jiang Huang, Yu Xin, Lei Yang, Quan-Hua Yuan, and Zhao-Yuan Ning

Description: By using optical emission spectroscopy, the vibrational and rotational temperatures of N2 and N2+ in capacitively coupled plasma (CCP) discharges driven by dual-frequency 41 MHz and 2 MHz are investigated. The vibrational and rotational temperatures are measured based on the N2+ first negative system and N2 second positive system overlapped molecular emission optical spectrum, using the method of comparing the measured and calculated spectra with a least-squ...

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