World Library  

 
  • Cover Image

Biblioteca Hispanica : Speech Read on the Literary University of S...

By: Serafin Sanz and Agud

Description: Botany History

Read More
  • Cover Image

Physics of Plasmas : Ion-acoustic solitary waves and their interac...

By: Jiu-ning Han, Sheng-lin Du, and Wen-shan Duan

Description: This paper discusses the existence of ion-acoustic solitary waves and their interaction in a weakly relativistic two-dimensional thermal plasma. Two Korteweg–de Vries equations for small but finite amplitude solitary waves in both ξ and η directions are derived. The phase shifts and trajectories of two solitary waves after the collision with an arbitrary angle α are also obtained. The effects of parameters of the normalized ion temperature σ, the ratio of he...

Read More
  • Cover Image

The Journal of Chemical Physics : Rovibrational matrix elements of...

By: Adya P. Mishra and T. K. Balasubramanian

Description: The present work pertains to the study of the rotational dynamics of N2 molecules solvated in a matrix of solid para-H2. It is shown that the mixing of the rotational states due to the anisotropic part of the N2–H2 pair potential in the solid gives rise to an additional 5.4% contribution to the intensity of quadrupole-induced double transitions involving N2–H2 pair. Hence the recently reported quadrupole moment matrix element of N2 in a solid para-H2 crystal...

Read More
  • Cover Image

Journal of Mathematical Physics : Lagrangian and Hamiltonian two-s...

By: Johannes Giannoulis, Michael Herrmann, and Alexander Mielke

Description: Studying spatially extended Hamiltonian systems with coherent microstructure, it is an important and challenging problem to identify reduced Hamiltonian models that describe the effective dynamics on large spatial and temporal scales. Such models require macroscopically varying, deterministic initial data which can possess a well-organized microstructure. This paper concerns the question how reasonable macroscopic Lagrangian and Hamiltonian structures can be...

Read More
  • Cover Image

Applied Physics Letters : Scatterometry for in situ measurement of...

By: Heather J. Patrick, Thomas A. Germer, Yifu Ding, Hyun Wook Ro, Lee J. Richter et al

Description: We use optical scatterometry to extract the time evolution of the profile of nanoimprinted lines in low and high molecular mass polymer gratings during reflow at the glass transition temperature. The data are obtained continuously during the anneal using a spectroscopic ellipsometer and analyzed using a rigorous-coupled-wave model. We show excellent agreement of scatterometry results with ex situ measurements of line height by atomic force microscopy and spe...

Read More
  • Cover Image

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...

Read More
  • Cover Image

Biblioteca Hispanica : Programs of Natural History and Physiology ...

By: Sandalio of. Pereda and Martinez
Read More
  • Cover Image

Journal of Mathematical Physics : The calculation of the bilinear ...

By: Ji-jun Ao and Achilaltu Wang

Description: The formula of the bilinear Boltzmann integral operator of gas mixtures is obtained. With the use of Bobylev’s transform it can be carried out much easier and an extended formula of more general validity is obtained. The formula can give the eigenvalues and the eigenfunctions of the bilinear Boltzmann integral operator of a gas mixture, which is essential to the solution of the Boltzmann equation.

Read More
  • Cover Image

Chaos : The organization of intrinsic computation: Complexity-entr...

By: David P. Feldman, Carl S. McTague, and James P. Crutchfield

Description: Intrinsic computation refers to how dynamical systems store, structure, and transform historical and spatial information. By graphing a measure of structural complexity against a measure of randomness, complexity-entropy diagrams display the different kinds of intrinsic computation across an entire class of systems. Here, we use complexity-entropy diagrams to analyze intrinsic computation in a broad array of deterministic nonlinear and linear stochastic proc...

Read More
  • Cover Image

Journal of Mathematical Physics : On computing the trace of the ke...

By: J. M. Velázquez-Arcos, C. A. Vargas, J. L. Fernández-Chapou, and A. L. Salas-Brito

Description: A method for computing the trace of the kernel of the homogeneous Fredholm’s equation for resonant states arising from nonlocal potentials is proposed. We show that this integral formulation is convergent.

Read More
  • Cover Image

Journal of Applied Physics : dc leakage mechanism in artificial bi...

By: Ayan Roy Chaudhuri and S. B. Krupanidhi

Description: The dc leakage behavior of 0.7Pb(Mg1/3Nb2/3)O3−0.3PbTiO3/La0.6Sr0.4MnO3 asymmetric superlattices has been studied over a wide range of temperatures between 30 and 200 °C. Leakage current characteristics analyzed in the light of different models indicated dominant Poole–Frenkel emission in the lower electric field region. Activation energy calculated from the Poole–Frenkel model was in the range of 0.19–0.34 eV for different superlattice periodicities. For th...

Read More
  • Cover Image

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...

Read More
  • Cover Image

Biblioteca Hispanica : Secrets of Nature

By: Geronimo Cortes
Read More
  • Cover Image

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...

Read More
  • Cover Image

Physics of Fluids : Evolution of neutral and charged droplets in a...

By: M. A. Fontelos, U. Kindelán, and O. Vantzos

Description: We study the evolution of drops of a very viscous and conducting fluid under the influence of an external electric field. The drops may be neutral or may be charged with some amount of electric charge. If both the external electric field and total drop charge are sufficiently small, then prolate spherical shapes develop according to Taylor’s observations. For sufficiently large charge and/or external field a self-similar conelike singularity develops in a me...

Read More
  • Cover Image

The Journal of Chemical Physics : Bond dissociation and correlatio...

By: Ali Goker, Francois Goyer, and Matthias Ernzerhof

Description: We present a simple model for a fundamental process in molecular electronics: The change in conductance upon bond breaking. In our model, a diatomic molecule is attached to spin-polarized contacts. Employing a Hubbard Hamiltonian, electron interaction is explicitly considered in the molecule and neglected in the contacts, enabling us to study the impact of electron interaction on the molecular conductance. In the limit where the electron repulsion is strong ...

Read More
  • Cover Image

Journal of Applied Physics : Molecular second harmonic generation ...

By: I. Berline, C. Fiorini-Debuisschert, C. Royal, L. Douillard, and F. Charra

Description: We report the measurement of efficient second harmonic generation at a metallic tip immersed in a molecular solution of highly nonlinear molecules. The dependence of the signal either with the tip-to-substrate applied voltage or with the tip-to-substrate distance is studied. We show that the signal originates from the orientation of a limited number of molecules following local centrosymmetry breaking under the tip. The results are discussed within the conte...

Read More
  • Cover Image

Physics of Fluids : Characteristics of cylindrical flame accelerat...

By: Kuo-Long Pan and Roman Fursenko

Description: We have studied the outward propagation of a cylindrical flame by means of a flame-tracking numerical method and direct computation of the Sivashinsky equation. The flame speed is modified by the local curvature, via a Markstein length ℓ, that somehow groups the complicated physiochemical effects and can be monotonically relevant to the system pressure. The flame is found to accelerate in a universal profile as a function of time, which is insensitive to ini...

Read More
  • Cover Image

Journal of Applied Physics : Patterning polycrystalline thin films...

By: A. Toma, B. Šetina Batic, D. Chiappe, C. Boragno, U. Valbusa et al

Description: We report on self-organized patterning of polycrystalline noble metal films, supported on dielectric substrates, by defocused Ar+ ion beam irradiation. The initial surface morphology affects the formation of nanostructures, forcing the growth of ripples with a lateral periodicity imposed by the pristine polycrystalline grain distribution. At the early stages, the self-organization process is dominated by the shadowing of taller grains, while a crossover to t...

Read More
  • Cover Image

Physics of Plasmas : Toroidal self-consistent modeling of drift ki...

By: Yueqiang Liu, M. S. Chu, I. T. Chapman, and T. C. Hender

Description: A self-consistent kinetic model is developed to study the stability of the resistive wall mode in toroidal plasmas. This model is compared with other models based on perturbative approaches. The degree of the kinetic modification to the stability of the mode depends on the plasma configurations. Both stabilizing and destabilizing kinetic effects are observed. The nonperturbative approach, with a self-consistent inclusion of the eigenfunctions and the eigenva...

Read More
 
1
|
2
|
3
Records: 21 - 40 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.