The outer billiard dynamical system models the motion of a particle around a compact domain, such as a planet orbiting a star. When considering outer billiards in hyperbolic space, an interesting problem is to determine precisely the conditions in which an orbiting particle breaks orbit and escapes to infinity. Past work has classified triangular and Penrose kite billiard tables according to wh...

This research is aimed to examine the repercussions of global pandemic, which has imposed restrictions on social interactions and community engagements indirectly impacted traditional Malayangan activities. The Rare Angon vehemently opposes this state affairs. In response, innovative minds elites have proposed concept a Virtual Kite Festival, aiming preserve cultural significance kite-flying am...

Given an acyclic digraph D, the phylogeny graph P (D) is defined to be the undirected graph with V (D) as its vertex set and with adjacencies as follows: two vertices x and y are adjacent if one of the arcs (x, y) or (y, x) is present in D, or if there exists another vertex z such that the arcs (x, z) and (y, z) are both present in D. Phylogeny graphs were introduced by Roberts and Sheng [6] fr...

In Experiment 1 rats had to escape from a kite-shaped pool by swimming to a submerged escape platform in a right-angled corner. The two walls creating this corner were white and the two walls creating the opposite, incorrect, right-angled corner were black. The rats were then trained in a square pool with two white walls forming one corner and two black walls forming the opposite corner. The pl...

We present a calibration method for a water vapour Raman lidar using a meteorological probe lifted by a kite, flown steadily above the lidar site, within the framework of the Hydrological Cycle in the Mediterranean Experiment (HyMeX) and Chemistry-Aerosol Mediterranean Experiment (ChArMEx) campaigns. The experiment was carried out in Menorca (Spain) during June 2013, using the mobile water vapo...

This paper presents the implementation of a modified state observer-based adaptive dynamic inverse controller for the Black Kite micro aerial vehicle. The pitch and velocity adaptations are computed by the modified state observer in the presence of turbulence to simulate atmospheric conditions. This state observer uses the estimation error to generate the adaptations and, hence, is more robust ...

Solar sails have been studied in the past as an alternative means of propulsion for spacecraft. Recent advances in solar sail technology and the miniaturisation of technology can drive these systems much smaller (< 5 kg mass, < 10 m sail diameter) than existing sails, while still having a high delta-V and acceleration capability. With these unique capabilities of miniature solar sails, called s...

OBJECTIVE To quantitatively and qualitatively analyze the results from treatment of congenital clubfoot with a mean follow-up of 4.6 years. METHODS 26 patients who underwent treatment by means of the Ponseti method were analyzed (total of 39 feet). The mean age at the start of the treatment was 5.65 months. The mean length of the follow-up subsequent to tenotomy of the Achilles tendon was 4.6...