Group delay ripples less than 3 ps in amplitude were measured in chirped fiber Bragg gratings used as gain flattening filters. The delay ripples of cascaded filters increase as the square root of their number.

the purpose of this study was to assess exposure to hand-arm vibration in tiller users, forty users of tiller in northeastern provinces of iran were examined to measure hand-arm vibration parameters such as root mean square acceleration (rms), total equivalent acceleration, vibration dose value (vdv) and crest factor in three directions (x, y, and z) and various operating modes for comparing th...

In the design of a large deployable mesh reflector, high surface accuracy is one ultimate goals since it directly determines overall performance reflector. Therefore, evaluation needed in many cases and analysis reflectors. The usually specified as root-mean-square error, which measures deviation geometry from desired working surface. this paper, methods error calculation for reflectors are rev...

In this article the invariant centroidal mean is introduced. A pair of double sequences in term Centroidal and its are defined discussed properties monotonicity log-convexity log-concavity. Finally as an illustration it justified that new Gaussian compound CT' ⊗ CT converging faster than H A. 2000 Mathematics Subject Classification. Primary 26D15.

In this study, we investigated the feasibility of using the C-band European Remote Sensing Satellite (ERS-1) synthetic aperture radar (SAR) data to estimate surface soil roughness in a semiarid rangeland. Radar backscattering coefficients were extracted from a dry and a wet season SAR image and were compared with 47 in situ soil roughness measurements obtained in the rocky soils of the Walnut G...