in this paper, effects of the structural parameters on the optical characteristics of an add-drop filter, consisting of two straight waveguides and a micro-ring resonator (mrr), have been investigated. in this research, effects of mrr radius, the width of mrr and waveguide and the gap between mrr and waveguide, on free spectral range (fsr) and coupling coefficient have been studied. it is found...

designing a power splitter with five ports has been shown in this article. in order to prevent the direct coupling between waveguides, a t-shaped structure with an appropriate distance has been used. the coupling between the parallel photonic crystal waveguides is based on multimode interference, while selecting the output efficiency is performed by setting the refractive coefficients and radiu...

zinc oxide nano-particles with the average diameter of about 25 nm were modified with different mole ratios of trimetoxyvinyl silane (tmvs) and oleic acid, as coupling agents, in order to modify their surface properties and render them more hydrophobic. then, dispersibility of the surface modified nano-particles was examined in some monomers with different levels of hydrophobicity, including me...

The article shows results of studies on assessing the effectiveness new principles for heat recovery exhaust air in ventilation systems apartment buildings (AB). Technological solutions are known that provide heating supply systems. efficiency such can reach 90%, but only coldest five-day period year with maximum temperature difference between and air. At all other times season, recuperative ex...

Human beings are inherently social, not solitary, creatures. Touch is their language of comfort and communication in social structures - this crisis that we living through puts them a vacuum, plagues mentally survives on pathological psychologically induced fear. It has been proved when people’s actual or achieved contact falls below desired level they begin to feel lonely thus degrading mental...

The increase in the thermal protection level of existing buildings enclosing structures, due to need comply with current norms building heat engineering requirements, leads increasing part losses balance a infiltration and exhaust ventilation operation. After exhaustion possibilities for implementation technical measures reduce energy costs by changing volumetric planning solutions insulating e...