Using molecular dynamics experiments, we have extended our previous analysis of equimolar mixtures of water and acetonitrile confined between silica walls [J. Phys. Chem. B 2009, 113, 12744] to examine similar solutions trapped within carbon nanotubes and cylindrical silica pores. Two different carbon tube sizes were investigated, (8,8) tubes, with radius R(cnt) = 0.55 nm, and (16,16) ones, wit...

The two-parameter phenomenological model allows to calculate formation energies of di erent nanotubes. The energy, geometry and size of the optimal tube were found. This tube has the minimal formation energy at the de nite number of atoms. A region of energetical stability of tubes in respect with planar fragment of graphite sheet was investigated. We accounted for the possible dangling bond en...

The properties of a partially ionized plasma in a long cylindrical tube subject to a uniform axial electric field are investigated. The plasma is maintained by an external ionizing source balanced by bulk and surface recombinations. Collisions between neutrals, whose density greatly exceeds the density of charged particles, and of neutrals with ions are sufficiently effective for their velocity...

This paper studies the acoustic backscattering of short ultrasonic pulses by air-filled stainless steel-solid polymer two-layer cylindrical tubes immersed in water. The stainless steel one-layer tube is taken as a reference. The focus of this paper is on revealing the effects of physical characteristics of the solid polymer on the scattering phenomenon. The work is done from the calculation of ...

Explosive forming is one of the unconventional techniques in which, most commonly, the water is used as the pressure transmission medium. One of the newest methods in explosive forming is gas detonation forming which uses a normal shock wave derived of gas detonation, to form sheet metals. For this purpose a detonation is developed from the reaction of H2+O2 mixture in a long cylindrical detona...

A method is described for characterizing the acoustical properties of flute head joints by measurement ofthe quantities F. =f./(2n -I), wheref. is the frequency of the nth impedance maximum of the head joint as viewed from the end of a short cylindrical tube simulating a part of the flute body and with the embouchure hole completely unobscured. The tube length is chosen to makef•_ 170 Hz. It is...

An analog VLSI circuit model of the vocal tract is described. The vocal tract is acoustically modeled as a series of uniform cross-section tubes concatenated end-to-end. Each section of tube is modeled as an RLC circuit whose element values are determined by its area and length with the current and voltage corresponding to volume velocity and pressure in the tube. An analog VLSI circuit is desc...

The key parameters of the inner structure of a cylindrical airlift bioreactor, including the ratio of the cross-section area of the downcomer to the cross-section area of the riser, clearance from the upper edge of the draft tube to the water level, and clearance from the low edge of the draft tube to the bottom of the reactor, significantly affected the biomass production of Botryococcus braun...

The properties of a partially ionized plasma in a long cylindrical tube subject to a uniform axial electric field are investigated. The plasma is maintained by an external ionizing source balanced by bulk and surface recombinations. Collisions between neutrals, whose density greatly exceeds the density of charged particles, and of neutrals with ions, are sufficiently effective for their velocit...