A planar quasi-endfire surface-wave antenna (SWA) using substrate integrated waveguide (SIW) technology for integration with CubeSats and other small satellites is proposed in this letter. This can be attached to the body of satellite, resulting a compact low-cost design. beam pattern achieved by radiation fundamental TM <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink...

The Ceylon Journal of Science is a peer-reviewed journal published quarterly by the University Peradeniya, Sri Lanka in March, June, September and December. It aimed at publishing high quality research articles on topics related to different disciplines Science. accepts original articles, book reviews, reviews mini-reviews, short communications, opinions, notes, commentaries notes. has its own ...

&lt;p style='text-indent:20px;'&gt;We develop a random version of the perturbation theory Gouëzel, Keller, and Liverani, consequently obtain results on stability Oseledets splittings Lyapunov exponents for operator cocycles. By applying to Perron-Frobenius cocycles associated &lt;inline-formula&gt;&lt;tex-math id="M1"&gt;\begin{document}$ \mathcal{C}^k $\end{document}&lt;/tex-math&gt;&lt;/inlin...

We prove a von Neumann type ergodic theorem for averages of unitary operators arising from the Furstenberg-Poisson boundary representation (the quasi-regular representation) of any lattice in a non-compact connected semisimple Lie group with finite center.

The quasi-classical ∂̄-dressing method is used to derive compact generating equations for dispersionless hierarchies. Dispersionless Kadomtsev-Petviashvili (KP) and two-dimensional Toda lattice (2DTL) hierarchies are considered as illustrative examples.