A geometric invariant for the study of planar curves and its application to spiral tip meander.

At present, no practical methodology exists for routine prediction of stream meander migration and uncertainty concerning the level of risk to infrastructure remains unacceptably high. This paper describes a Handbook that includes ArcView 3.2-based Bend Measurement and Channel Migration Predictor extensions, which provides a practical methodology to transportation engineers, floodplain managers...

Several Brownian areas are considered in this paper: the Brownian excursion area, the Brownian bridge area, the Brownian motion area, the Brownian meander area, the Brownian double meander area, the positive part of Brownian bridge area, the positive part of Brownian motion area. We are interested in the asymptotics of the right tail of their density function. Inverting a double Laplace transfo...

SkyCross' state-of-the-art antennas are smaller and can be embedded directly within the handset. In addition, they feature better gain and improved efficiency, resulting in longer battery life than other handsets currently available on the market today. Furthermore, MLA technology allows engineers to design ultra broadband antennas capable of operating at multiple frequencies and in a variety o...

The present paper describes a capacitive feed (C-feed) for small, low-profile linear antennas. A meander line, which is the radiating element, in such antennas with a metallic back conductor electromagnetically couples a metallic feed plate placed between the meander line and the back metal (ground). This antenna has a very small leakage current on the outer surface of the coaxial cable and can...

We conjecture that meanders are governed by the gravitational version of a c = −4 two-dimensional conformal field theory, allowing for exact predictions for the meander configuration exponent α = √ 29( √ 29 + √ 5)/12, and the semi-meander exponent ᾱ = 1+ √ 11( √ 29+ √ 5)/24. This result follows from an interpretation of meanders as pairs of fully packed loops on a random surface, described by t...

Slotted Meander-Line Resonator (SMLR) is implemented by creating defect in the microstrip structure. This resonator is designed to block the surface current at the resonant frequency of the two patch antennas coupled along H-plane operating at 3.6 GHz. The proposed configuration provides an improvement in isolation by 10 dB (measured value) with a reduced edge-to-edge spacing of 7 mm (λ0/9). Th...

We review a number a recent advances in the study of two-dimensional statistical models with strong geometrical constraints. These include folding problems of regular and random lattices as well as the famous meander problem of enumerating the topologically inequivalent configurations of a meandering road crossing a straight river through a given number of bridges. All these problems turn out t...