The effect of acetosolv pulping variables viz. pulping time, temperature, catalyst (HCl) and acetic acid on oil palm frond fibres was investigated. The following conditions were found to be optimum to pulp frond fibres: 140 oC, 0.5% HCl, 75% acetic acid, and 1/10 solid/liquor ratio. Under these conditions we could obtain these properties: Kappa number 13-16, zero-span tensile breaking length – ...

moving in line with the postulation that metadiscourse (md) markers help transform a dry and tortuous piece of text into a coherent and reader-friendly one, the researchers in the current study attempted to investigate the effect different metadiscourse markers might have on iranian efl learners’ perception of written texts. to this end, 120 undergraduate english students were given three diffe...

In this study, the change in mechanical properties of Niobium (Nb) nanowire with different grain numbers under applied uniaxial tensile deformation was tried to be investigated by Molecular Dynamics (MD) simulation method. The Embedded Atom Method (EAM), which includes many-body interactions, used determine force interactions between atoms. To effect number on Nb nanowire, stress-strain curve, ...

in this paper, the stability characteristics of single-walled carbon nanotubes (swcnts) under the action of axial load are investigated. to this end, a nonlocal flügge shell model is developed to accommodate the small length scale effects. the analytical rayleigh-ritz method with beam functions is applied to the variational statement derived from the flügge-type buckling equations. molecular dy...

tenth section: operative environment chairmen: javad parvizi md, frcs; thorsten gehrke, md

Recently, Suk, Barov, and Rosenzweig [Phys. Rev. Lett. 86, 1011 (2001)] proposed a scheme for trapping background electrons in a plasma wake field using a sudden downward transition in the background ion density, where the density transition length is small compared to the plasma skin depth. In the present paper we present a fluid dynamical description of this mechanism that is self-consistent ...

Droplets and bubbles are thought to be two sides of the same coin; this work determines how true is at molecular scale. Stable cylindrical nanodroplets nanobubbles obtained in Molecular Dynamics (MD) simulations with three-phase contact lines pinned by alternate hydrophobic hydrophilic patterns. The surface tension Tolman length for both types curved interfaces Kirkwood–Buff method, based on di...

Extensive urbanization has greatly raised the demand for cleaner coal- and petroleum-derived fuels. Mainly composed of methane, natural gas represents a promising alternative for this purpose, making its storage a significant topic. In the present research, deposition of methane molecules in C60 fullerene was investigated through a combined approach wherein density functional based tight bindin...

We study a N = 1 supersymmetric model in a S1×R spacetime. We find that by choosing appropriate boundary conditions for the contributing fields supersymmetry can be preserved. However if we add a hard supersymmetry breaking term, we observe that for small values of the length of the S dimension, supersymmetry remains unbroken and breaks spontaneously when the length exceeds a critical value. Th...

In the context of fracture simulations polymers, molecular mechanisms in vicinity crack tip are particular interest. Nevertheless, to keep computational cost a minimum, coarser resolution must be used remaining regions numerical sample. For specific case amorphous Capriccio method bridges gap between length and time scales involved at different levels by concurrently coupling dynamics (MD) with...