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Nikolay Kanev
Metasurfaces formed by monopole and dipole resonators are studied theoretically. The monopole resonators are Helmholtz resonators or membranes vibrating on the first eigenfrequency; the dipole ones are spheres on springs or membranes vibrating on the sec...
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Gesang Nugroho, Galih Zuliardiansyah and Azhar Aulia Rasyiddin
A Vertical Take-Off and Landing-Plane (VTOL-Plane) is an Unmanned Aerial Vehicle (UAV) that combines multirotor and fixed-wing configurations. It has a good cruise range compared to a VTOL vehicle. Furthermore, it can take-off and land vertically. This t...
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Xiaoming Wang, Xinhan Hu, Chengbin Huang and Wenya Zhou
The mission performance of future advanced aerospace structures can be synthetically improved via active shape control utilizing piezoelectric materials. Multiple work modes are required. Bending/twisting mode control receives special attention for many ...
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Robert E. Weber, Janusz J. Petkowski and Monika U. Weber
Evidence of chemical disequilibria and other anomalous observations in the Venusian atmosphere motivate the search for life within the planet?s temperate clouds. To find signs of a Venusian aerial biosphere, a dedicated astrobiological space mission is r...
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Alessandro A. Quarta, Giovanni Mengali, Marco Bassetto and Lorenzo Niccolai
The transfer between two coplanar Keplerian orbits of a spacecraft with a continuous-thrust propulsion system is a classical problem of astrodynamics, in which a numerical procedure is usually employed to find the transfer trajectory that optimizes (i.e....
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