In this paper, a Time-to-go Polynomial Guidance (TPG) law satisfying impact angle constraints for missiles of time-varying velocity against stationary target is investigated. The guidance law assumes the magnitude of guidance commands as a polynomial function of time-to-go with two unknown coefficients. The coefficients are determined to satisfy the two terminal constraints, which are the termi...

Centre for Mathematical Physics and Stochastics, supported by the Danish National Research Foundation. AMS 1980 subject classifications. Primary 60J65, 60E15, 34A34. Secondary 60G40, 60J60, 60G15.

Super water-repellent surfaces occur naturally on plants and aquatic insects and are created in the laboratory by combining micro or nano-scale surface topographic features with hydrophobic surface chemistry. When such types of water-repellent surfaces are submerged they can retain a film of air (a plastron). In this work, we report measurements of the terminal velocity of solid acrylic spheres...

1. Organisms live surrounded by air or water, which exert drag on an organism when moving. These forces are significant ecologically because they can affect organisms’ distribution, behaviour or dispersal. 2. Appropriate techniques for measuring or estimating these forces vary greatly depending on the magnitude of the forces and the flow pattern of the moving fluid (air or water; both gases and...

Context. The Microwave Instrument on the Rosetta Orbiter (MIRO) board spacecraft was designed to investigate surface and gas activity of comet 67P/Churyumov-Gerasimenko. MIRO spectroscopic measurements carry information about velocity emanating from nucleus surface. Knowledge terminal H 2 O is valuable for interpretation in situ measurements, calibrating 3D coma simulations, studying physics ac...

An analysis is made to see the influences of Hall current on the flow of a Burgers’ fluid. The velocity field corresponding to flow in a pipe is determined. The closed form analytical solutions for several Newtonian and non-Newtonian fluid models can be obtained from the present analysis as the limiting cases. MIRAMARE – TRIESTE December 2005 Corresponding author: mkhan−[email protected] Junior Asso...