Abstract Kite flying is a popular hobby and sport for children adults. Despite being illegal in Rio de Janeiro state, Brazil, the use of abrasive threads remains widespread poses health risk to both humans animals. In this study, we analysed records 462 magnificent frigatebirds ( Fregata magnificens ) submitted rehabilitation centres or found dead along southern coast state from October 2016 Au...

The purpose of this article is to view the Penrose kite from the perspective of symplectic geometry. Mathematics Subject Classification 2000. Primary: 53D20 Secondary: 52C23 Introduction The kite in a Penrose aperiodic tiling by kite and darts [8, 9] is an example of a simple convex polytope. By the Atiyah, Guillemin–Sternberg convexity theorem [1, 6], convex polytopes that are rational can be ...

Genetic divergence in the Snail Kite S. E. Haas t al. HORT COMMUNICATION Genetic divergence among Snail Kite subspecies: implications for the conservation of the endangered Florida Snail Kite Rostrhamus sociabilis S. E. HAAS, 1 R. T. KIMBALL, 1 J. MARTIN 2 & W. M. KITCHENS 2 * 1 Department of Zoology, University of Florida, PO Box 118525, Gainesville, Florida 32611, USA 2 Florida Cooperative Fi...

Wilson's storm petrel (Oceanites oceanicus) characteristically feeds by ' hovering' over the water surface, but its technique for this is unlike that of other flying vertebrates. The kinematics and aerodynamics of this ' hovering' flight were investigated to determine the possible sources of lift; various nonaerodynamic sources of lift were discounted. It is suggested that the storm petrel soar...

This article consist of two parts. In the first part, we enumerate the kite systems of order 8; in the second part, we consider embedding kite systems into bowtie systems.

An octagon quadrangle is the graph consisting of an 8-cycle (x1, ..., x8) with two additional chords: the edges {x1, x4} and {x5, x8}. An octagon quadrangle system of order v and index λ [OQS] is a pair (X,B), where X is a finite set of v vertices and B is a collection of edge disjoint octagon quadrangles (called blocks) which partition the edge set of λKv defined on X. A 4-kite is the graph ha...

A 12-year old boy went out on the “Makara Sankranthi” day this January to take part in the kite flying celebration along with his friends. His kite went quite high but unfortunately for him it got entangled with another kite and broke off. The kite along with a bit of thread got stuck in an electrical cable that was passing between the poles next to a building under construction. The boy reache...

Recently designed wind energy systems use large traction kites to drive electricity generation equipment at ground level; this exploits stronger and more consistent winds available at higher altitudes than used by traditional wind turbine systems. These kites require active control; in this study we build upon past work demonstrating the use of evolutionary robotics techniques to build neural n...

A novel tracking paradigm for flying geometric trajectories using tethered kites is presented. It is shown how the differential-geometric notion of turning angle can be used as a one-dimensional representation of the kite trajectory, and how this leads to a single-input single-output (SISO) tracking problem. Based on this principle a Lyapunov-based nonlinear adaptive controller is developed tha...