Results 1 to 10 of about 109,132 (281)

Sublunary Movement [PDF]

open access: yesCientífica, 2022
There are different ways to solve motion problems, namely, Newtonian, Lagrangian, Hamiltonian, powerful methods in solving any problem related to motion and its possible causes.
Mario Antonio Ramirez Flores   +1 more
doaj   +1 more source

Asymptotic analysis of displaced lunar orbits [PDF]

open access: yes, 2009
The design of spacecraft trajectories is a crucial task in space mission design. Solar sail technology appears as a promising form of advanced spacecraft propulsion which can enable exciting new space science mission concepts such as solar system ...
Simo, Jules, McInnes, Colin R.
core   +4 more sources

Artificial halo orbits for low-thrust propulsion spacecraft [PDF]

open access: yes, 2009
We consider periodic halo orbits about artificial equilibrium points near to the Lagrange points L1 and L2 in the circular restricted three-body problem, where the third body is a low-thrust propulsion spacecraft in the Sun-Earth system.
Baig, Shahid, McInnes, Colin R.
core   +4 more sources

New periodic orbits in the solar sail three-body problem [PDF]

open access: yes, 2011
We identify displaced periodic orbits in the circular restricted three-body problem, wher the third (small) body is a solar sail. In particular, we consider solar sail orbits in the earth-sun system which are high above the exliptic plane.
Biggs, J.D., Waters, T., McInnes, C.R.
core   +4 more sources

Izviđanje satelitskih komunikacija u funkciji savremenih operacija / Reconnaissance of satellite communications in contemporary operations [PDF]

open access: yesVojnotehnički Glasnik, 2004
Raspoloživi vojni resursi u bilo kojoj kategoriji nisu kritični u mirnodopskom periodu, jer se dimenzionišu za ratno naprezanje određenog nivoa. Međutim, u uslovima izvođenja borbenih dejstava postoje ekstremi u zahtevima za angažovanjem, koje sistemi ne
Slaviša Đukanović
doaj   +1 more source

Use of Sentinel-1 Multi-Configuration and Multi-Temporal Series for Monitoring Parameters of Winter Wheat

open access: yesRemote Sensing, 2021
The present study aims to investigate the potential of multi-configuration Sentinel-1 (S-1) synthetic aperture radar (SAR) images for characterizing four wheat parameters: total fresh mass (TFM), total dry mass (TDM), plant heights (He), and water ...
Azza Gorrab   +3 more
doaj   +1 more source

Displaced solar sail orbits : dynamics and applications [PDF]

open access: yes, 2010
We consider displaced periodic orbits at linear order in the circular restricted Earth-Moon system, where the third massless body is a solar sail. These highly non-Keplerian orbits are achieved using an extremely small sail acceleration.
Simo, Jules, McInnes, Colin R.
core   +4 more sources

On the Dynamic Geometry of Kasner Quadrilaterals with Complex Parameter

open access: yesMathematics, 2022
We explore the dynamics of the sequence of Kasner quadrilaterals (AnBnCnDn)n≥0 defined via a complex parameter α. We extend the results concerning Kasner triangles with a fixed complex parameter obtained in earlier works and determine the values of α for
Dorin Andrica, Ovidiu Bagdasar
doaj   +1 more source

Computation of Zagreb and atom-bond connectivity indices of certain families of dendrimers by using automorphism group action [PDF]

open access: yesJournal of the Serbian Chemical Society, 2017
In QSAR/QSPR studies, topological indices are utilized to predict the bioactivity of chemical compounds. In this paper, the closed forms of different Zagreb indices and atom–bond connectivity indices of regular dendrimers G[n] and H[n] in terms of a ...
Ahmad Uzma, Ahmad Sarfraz, Yousaf Rabia
doaj   +1 more source

On the stability of displaced two-body lunar orbits [PDF]

open access: yes, 2010
In a prior study, a methodology was developed for computing approximate large displaced orbits in the Earth-Moon circular restricted three-body problem (CRTBP)by the Moon-Sail two-body problem.
Simo, Jules, McInnes, Colin R.
core   +4 more sources

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