Stationary Ballistic 'V' States for Preferred Motions of Many Particles

We use the discrete kinetic theory with the free-orientation parameter being fixed ($\pi/4$) to derive the macroscopic velocity field for many particles flowing through a microdomain. Our results resemble qualitatively other hydrodynamical solutions. The V-shaped velocity field changes as the dominant physical parameter (Knudsen number) varies. We also briefly discuss the possible mechanism due to the entropy production along the boundaries.Comment: 1999-Works; two figure

Comments on "Microscale flow visualization"

We make comments on the presentation of Sinton's paper (Microfluidics and Nanofluidics {\bf 1}: 2, 2004) about the microscale flow visualization since the effects of the roughness along the microfabricated wall upon the current macroflow visualization methods could be significant and cannot be neglected in microdomain and even nanodomain.Comment: 3 page

Possible Pressure Effect for Superconductors

We make an estimate of the possible range of $\Delta T_c$ induced by high-pressure effects in post-metallic superconductors by using the theory of {\it extended irreversible/reversible thermodynamics} and Pippard's length scale. The relationship between the increment of the superconducting temperature and the increase of the pressure is parabolic.Comment: 6 pages; 1999-March result

Possible Negative Pressure States in the Evolution of the Universe

Hydrodynamic derivation of the entrainment of matter induced by a surface elastic wave propagating along the flexible vacuum-matter interface is conducted by considering the nonlinear coupling between the interface and the rarefaction effect. The critical reflux values associated with the product of the second-order (unit) body forcing and the Reynolds number (representing the viscous dissipations) decrease as the Knudsen number (representing the rarefaction measure) increases from zero to 0.1. We obtained the critical bounds for matter-freezed or zero-volume-flow-rate states corresponding to specific Reynolds numbers (ratio of wave inertia and viscous dissipation effects) and wave numbers which might be linked to the evolution of the Universe. Our results also show that for positive evolution of the matter (the maximum speed of the matter (gas) appears at the center-line) there might be existence of negative pressure.Comment: 4 Figures in tota

Stability of Quantum Fluids : Wavy Interface Effect

A numerical investigation for the stability of the incompressible slip flow of normal quantum fluids (above the critical phase transition temperature) inside a microslab where surface acoustic waves propagate along the walls is presented. Governing equations and associated slip velocity and wavy interface boundary conditions for the flow of normal fluids confined between elastic wavy interfaces are obtained. The numerical approach is an extension (with a complex matrix pre-conditioning) of the spectral method. We found that the critical Reynolds number ($Re_{cr}$ or the critical velocity) decreases significantly once the slip velocity and wavy interface effects are present and the latter is dominated ($Re_{cr}$ mainly depends on the wavy interfaces).Comment: 4 Figures; 2004-Jan work

Comments on "Evidence for Quantized Displacement in Macroscopic Nanomechanical Oscillators"

We make comments on Gaidarzhy {\it et al.}'s [{\it Phys. Rev. Lett.} 94, 030402 (2005)] letter.Comment: 3 page

Note on the 818_{18}-Knot

We define some physical variables associated with the traversing sequences of electrons along the orbit which is a 2D projection of 8$_{18}$-knot. The configuration is regular but the resulting contributions, which are related to the physical variable, of those combinations from all the possible states to the fixed spatial sites show certain irregular behavior near the over- or under-crossing points of this knot. The possible explanation for this kind of direct geometric consequences is made to linked to the physical insight.Comment: One Table and Two Figures; 1999-Feb. complete

Resonant States of Wave Propagation in Disordered System of Bosonic Particles

We demonstrate the effects of an induced disorder (or a free-orientation : $\theta$ which is related to the relative direction of scattering of particles w.r.t. to the normal of the propagating plane-wave front) upon the possible resonance of the plane (sound) wave propagating in Bose gases by using the quantum kinetic equations. We firstly present the diverse dispersion relations obtained by the relevant Pauli-blocking parameter $B$ (which describes the Bose particles when $B$ is positive) and the free-orientation $\theta$ and then, based on the acoustic analog, address the possible resonant states.Comment: 7 Figures; 2004-March complete

Comments on "Structural dynamics and resonance in plants with nonlinear stiffness"

We make comments on the paper by Miller [{\it J. Theor. Biol.} {\bf 234} (2005) 511].Comment: 4 page

Superconductivity in the Infinite Layer Compound CaCuO2

Superconductivity in the electric field-effect doped infinite layer compound CaCuO2 is considered. It is argued that in the superconducting CuO2 layer, next to the insulating Al2O3 overlayer, the coordination of the Cu2+ ions by oxygens is pyramidal rather than square planar. This view stems from existing NEXAFS and the analysis of HRETM results, as well as chemical considerations, and is discussed mainly for the hole doped but also the electron doped region of the phase diagramm.Comment: 3 page