Bright and dark helices of light

Bright and dark helices of light.

Laser beams can be made to form bright and dark intensity helices of light. Such helices have a pitch length on the order of a wavelength and may have applications in lithography and the manipulation of particles through optical forces. The formation of bright helices is more strongly constrained by optical resolution limits than that of dark helices, corresponding scaling laws are derived and ...

Bright Light from Dark Matter

Bright and Dark Solitons

Departamento de Teoría de la Señal y Comunicaciones e Ingeniería Telemática Universidad de Valladolid, ETSI Telecomunicación, Campus Miguel Delibes s/n 47011 Valladolid, Spain Phone: +34 983 185545, Fax: +34 983 423667, e-mail: [email protected] Joule Physics Laboratory, School of Sciences, Institute of Materials Research University of Salford, Salford M5 4WT, UK Phone: +44 161 295 5079, Fax: +...

Generalization of general helices and slant helices

In this work, we use the formal definition of $k$-slant helix cite{ali2} to obtain the intrinsic equations as well as the position vector for emph{slant-slant helices} which a generalization of emph{general helices} and emph{slant helices}. Also, we present some characterizations theorems for $k$-slant helices and derived, in general form, the intrinsic equations for such curves. Thereafter, fr...

Bright and dark sides of computational intelligence

The paper describes basic concepts of neural networks and fuzzy systems. It is shows that most commonly used neural network architecture of MLP – Multi Layer Perceptron is also one of the least efficient ones. Also most commonly used EBP – Error Back Propagation algorithm is not only very slow, but also it is not able to find solutions for optimal neural network architectures. EBP can solve pro...