World Library  


 
  • Cover Image

Biblioteca Hispanica : Notions of Natural History

By: Benito Garcia De Los Santos
Read More
  • Cover Image

The Journal of Chemical Physics : Equilibrium and nonequilibrium t...

By: J. B›awzdziewicz and E. Wajnryb

Description: Our recent quasi-two-dimensional thermodynamic description of thin liquid films stabilized by colloidal particles is generalized to describe nonuniform equilibrium states of films in external potentials and nonequilibrium transport processes produced in the film by gradients of thermodynamic forces. Using a Monte Carlo simulation method, we have determined equilibrium equations of state for a film stabilized by a suspension of hard spheres. Employing a multi...

Read More
  • Cover Image

Physics of Plasmas : Variational derivation of the dispersion rela...

By: C. Nguyen, X. Garbet, and A. I. Smolyakov

Description: In the present paper, we compare two modes with frequencies belonging to the acoustic frequency range: the geodesic acoustic mode (GAM) and the Beta Alfvén eigenmode (BAE). For this, a variational gyrokinetic energy principle coupled to a Fourier sidebands expansion is developed. High order finite Larmor radius and finite orbit width effects are kept. Their impact on the mode structures and on the Alfvén spectrum is calculated and discussed. We show that in ...

Read More
  • Cover Image

Journal of Applied Physics : Suppressing random dopant-induced flu...

By: Petru Andrei and Liviu Oniciuc

Description: This article introduces a robust and computationally efficient technique for the design of fluctuation-resistant structures (fault-tolerant) semiconductor devices. This technique can be applied to the computation of the doping profiles that minimize the intrinsic variations in various parameters induced by random dopant fluctuations. The technique is based on the evaluation of doping sensitivity functions, which are defined as elements of the space adjoint t...

Read More
  • Cover Image

Applied Physics Letters : Experimental isolation of degradation me...

By: Z. Olszewski, R. Houlihan, C. Ryan, C. OMahony, and R. Duane

Description: DC and bipolar voltage stresses are used to isolate mechanical degradation of the movable electrode from charging mechanism in microelectromechanical capacitive switches. Switches with different metals as the movable electrode were investigated. In titanium switches, a shift in the pull-in voltages is observed after dc stressing whereas no shift occurs after the bipolar stressing, which is to be expected from charging theory. On switches with similar dielect...

Read More
  • Cover Image

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

By: Serafin Sanz and Agud

Description: Botany History

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

Journal of Mathematical Physics : The effect of classical noise on...

By: Jean-Philippe Aguilar and Nils Berglund

Description: We consider a quantum two-level system perturbed by classical noise. The noise is implemented as a stationary diffusion process in the off-diagonal matrix elements of the Hamiltonian, representing a transverse magnetic field. We determine the invariant measure of the system and prove its uniqueness. In the case of Ornstein–Uhlenbeck noise, we determine the speed of convergence to the invariant measure. Finally, we determine an approximate one-dimensional dif...

Read More
  • Cover Image

Biblioteca Hispanica : Circular and Regulation of the Spanish Soci...

By: Biblioteca Hispanica

Description: History Spanish Royal Society of Natural

Read More
  • Cover Image

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×...

Read More
  • Cover Image

Journal of Applied Physics : Study of laser excited vibration of s...

By: Yaqin Song, Bernard Cretin, D. M. Todorovic, and Pascal Vairac

Description: In this paper an interferometric setup called “thermoelastic microscopy” has been used to measure the vibration response of the semiconductor cantilevers under modulated laser thermal source. The small vibration amplitude has been detected well below 10 pm magnitude in accurate adjustment conditions. The results showed that experimental responses have a good agreement with the theoretical ones. Also from the analysis we could conclude that the signal amplitu...

Read More
  • Cover Image

Physics of Fluids : Chaotic motions of a forced droplet-droplet os...

By: D. M. Slater, C. A. López, A. H. Hirsa, and P. H. Steen

Description: A model for the motion of two coupled spherical-cap droplets subject to periodic forcing is studied. The inviscid unforced model is a conservative second-order system, similar to Duffing’s equation. Surface tension resists the inertia of deformations from the spherical shape. Steady states of the system are parametrized by the total combined volume of the two droplet caps. The family of equilibria exhibits a classical pitchfork bifurcation, where a single le...

Read More
  • Cover Image

Physics of Fluids : Breakup of the tail of a bubble in a non-Newto...

By: Enrique Soto, Roberto Zenit, and Octavio Manero

Description:

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

Applied Physics Letters : Growth behaviors of ultrathin ZnSe nanow...

By: Y. Cai, T. L. Wong, S. K. Chan, I. K. Sou, D. S. Su et al

Description: Ultrathin ZnSe nanowires grown by Au-catalyzed molecular-beam epitaxy show an interesting growth behavior of diameter dependence of growth rates. The smaller the nanowire diameter, the faster is its growth rate. This growth behavior is totally different from that of the nanowires with diameters greater than 60 nm and cannot be interpreted by the classical theories of the vapor-liquid-solid mechanism. For the Au-catalyzed nanowire growth at low temperatures, ...

Read More
  • Cover Image

Journal of Mathematical Physics : The classical point electron in ...

By: Andre Gsponer

Description: The electric and magnetic fields of a pole-dipole singularity attributed to a point-electron singularity in the Maxwell field are expressed in a Colombeau algebra of generalized functions. This enables one to calculate dynamical quantities quadratic in the fields which are otherwise mathematically ill-defined: the self-energy (i.e., “mass”), the self-angular momentum (i.e., “spin”), the self-momentum (i.e., “hidden momentum”), and the self-force. While the t...

Read More
  • Cover Image

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

By: Jose Maria Paniagua
Read More
  • Cover Image

Applied Physics Letters : Enhanced field emission from ZnO nanotet...

By: Chi Li, Kai Hou, Xiaxi Yang, Ke Qu, Wei Lei et al

Description: Field emission properties of screen-printed ZnO nanotetrapods on a carbon nanofiber buffered Ag electrode were studied. The turn-on electric field (at a current of 0.1 μA/cm2) and maximum emission current are 0.6 V/μm and 2.8 mA/cm2 (at a field of 2.2 V/μm), which were significantly improved compared to the control device made of ZnO nanotetrapods on Ag directly without a carbon nanofiber buffer. The improved field emission is due to the better contact (both...

Read More
  • Cover Image

Applied Physics Letters : ZnO nanowire arrays: Optical scattering ...

By: Ramón Tena-Zaera, Jamil Elias, and Claude Lévy-Clément

Description: Arrays of ZnO nanowires with different lengths (0.5–2 μm) and diameters (100–330 nm) were electrodeposited to study the influence of the nanowire dimensions on light scattering. The nanowire length and diameter were found to be major parameters in modifying the intensity and the wavelength of the scattered radiation, respectively. A significant scattering for the whole visible wavelength range was attained in arrays of ZnO nanowires of ∼ 1.5 μm in length and...

Read More
  • Cover Image

Journal of Applied Physics : Relaxations in Ba2BiSbO6 double compl...

By: Manoel Carvalho Castro, Carlos William de Araujo Paschoal, Frank C. Snyder, and Michael W. Lufaso

Description: The electric properties of the complex double perovskite Ba2BiSbO6 have been investigated using impedance spectroscopy in the frequency range from 1 Hz up to 1 MHz and in the temperature range from room temperature up to 560 K. There are two contributions to the electrical properties due to the grain and grain boundary. The oxygen vacancies play an important role in the conductivity and strongly increase the dielectric constant at high temperatures. The anal...

Read More
 
1
|
2
|
3
Records: 1 - 20 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook 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.