An evacuated tubular solar collector was fabricated from acrylics for improved resistance to shattering. A plasmatron was employed to apply a thin gas-barrier coating to the surfaces of the plastic tube to prevent/alleviate gas infiltration. Experiments were conducted to investigate the effect...

The fluctuation of the intensity of superradiant pulse is calculated by applying a general asymptotic evaluation method of quantal macrovariables to a superradiant master equation. It is shown that the fluctuation of superradiant intensity is proportional to the cube of the number of the...

Non-equilibrium aging dynamics in 3D Ising spin glass Cu<Subscript>0.5</Subscript>Co<Subscript>0.5</Subscript>Cl<Subscript>2</Su bscript>-FeCl<Subscript>3</Subscript> GBIC has been studied by zero-field cooled (ZFC) magnetization and low frequency AC magnetic susceptibility (f=0.05 Hz), where <InlineEquation ID="Equ5"> <EquationSource Format="TEX">$T_{g}=3.92 \pm 0.11$</EquationSource> </InlineEquation> K. The time dependence of the relaxation rate S(t)=(1/H)d<InlineEquation ID="Equ6"> <EquationSource Format="TEX">$M_{\rm...</equationsource></inlineequation></equationsource></inlineequation></subscript><//su></subscript></subscript></subscript>

Motorization is a self-reinforcing process, which involves positive feedback. Using a simple model of bi-modal transportation system, it is shown that a transportation system may eventually be dominated by the automobile, or may equilibrate at a grossly inefficient point due to social dilemmas...

Statistical properties of the inhomogeneous version of the Olami-Feder-Christensen (OFC) model of earthquakes is investigated by numerical simulations. The spatial inhomogeneity is assumed to be dynamical. Critical features found in the original homogeneous OFC model, e.g., the Gutenberg-Richter...