Photonic crystal microcavities, formed by local defects within an otherwise perfectly periodic structure, can be used as narrowband optical resonators and filters. The coupled-cavity waveguide (CCW) is a linear array of equally spaced identical microcavities. Tunneling of light between microcavities forms a guiding effect, with a central frequency and bandwidth controlled by the local defects' ...

We study the large time behaviour of reaction-diffusion equation ∂tu=Δu+f(u) in spatial dimension N, when non-linear term is bistable and initial datum compactly supported. prove existence a Lipschitz function s∞ unit sphere, such that u(t,x) converges uniformly RN, as t goes to infinity, Uc⁎(|x|−c⁎t+N−1c⁎lnt+s∞(x|x|)), where Uc⁎ unique 1D travelling profile. This extends earlier results identi...

The hazard function model employed internationally in radiological risk assessment for deterministic (threshold-type) biological effects of moderate and high doses of ionizing radiation is used to distinguish three levels of risk for Fukushima recovery workers: life-threatening damage unlikely (RADHAZ low), possible (RADHAZ moderate), and likely (RADHAZ high). Based on hypothetical exposures co...

The protein tyrosine kinase inhibitor, genistein, has been reported to inhibit proliferation and to induce cell death in various non-solid and solid cancer cell lines. Herein, we examined the effects of genistein in several human malignant glioma cell lines. We found that genistein inhibited the proliferation of LN-18, LNT-229, LN-308 and T98G cells at EC50 concentrations of 25-80 microM (72 h ...

We introduce a model for prediction the behavior of electrodes which modified withcarbon nanotubes in a polymer medium. These kinds of polymer composites aredeveloped in recent years, and experimental data for its percolation threshold isavailable. We construct a model based on percolation theory and fractal dimensionsand using experimental percolation threshold for calculating the moments of c...

N/N !. In many cases, lnT ′ provides an asymptotically accurate estimate of lnT . The idea of the algorithm is to express T as the expectation of the permanent of an N ×N random matrix with exponentially distributed entries and approximate the expectation by the integral T ′ of an efficiently computable log-concave function on R. Applications to counting integer flows in graphs are also discussed.

We reconsider stochastic resonance (SR) for an overdamped bistable dynamics driven by a harmonic force and Gaussian noise from the viewpoint of the gain behavior, i.e., the signal-to-noise ratio (SNR) at the output divided by that at the input. The primary issue addressed in this work is whether a gain exceeding unity can occur for this archetypal SR model, for subthreshold signals that are bey...