We propose a new type highly birefringent spiral photonic crystal fiber (PCF) for residual dispersion compensation in a wide range of wavelengths. The 2-D finite element method (FEM) with perfectly matched boundary layer (PML) is used for numerical simulation. The arrangement and diameter of circular air holes in the designed PCF has been tuned to offer almost flat dispersion profile with avera...

The object of the research is firing temperature ceramic materials based on barium titanate. In laboratory conditions, titanate was synthesized from raw carbonate and titanium dioxide using technology, taking into account stoichiometric composition compound. order to study effect properties material, three temperatures were selected: 1270, 1300, 1350 °C. physical samples (imaginary density, wat...

We report laser ablation inductively coupled plasma mass spectrometry measurements of the trace element contents two naturally occurring quasicrystalline minerals, Al63Cu24Fe13 icosahedrite and Al71Ni24Fe5 decagonite, from their type locality in Khatyrka meteorite. The isolated quasicrystal fragments were mounted separately any matrix are larger than beam diameter. When elements sorted order vo...

Gradients in elevation impose changes environmental conditions, which turn modulate species distribution and abundance as well the interactions they maintain. Along gradient, interacting (e.g., predators, parasitoids) can respond to different ways. This study aims investigate how egg parasitism of a forest pest, pine processionary moth (PPM), Thaumetopoea pityocampa, vary along an elevational g...