Results 81 to 90 of about 45,218 (214)
Melnikov method for autonomous Hamiltonians
, 1996 The web page contains both the dvi and postscript version of the paper. This paper presents the method of applying the Melnikov method to autonomous Hamiltonian systems in dimension four. Besides giving an application to Celestial Mechanics, it discusses
Robinson, Clark
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Topics in Cognitive Science, EarlyView.Abstract Many core human activities require an understanding of time. To coordinate rituals, plan harvests and hunts, recall histories, keep appointments, and follow recipes, we need to grapple with invisible temporal structures like durations, sequences, and cycles. No other species seems to do this.
Kensy Cooperrider
wiley +1 more source
The Unreasonable Effectiveness of the nΣv Approximation
The Astrophysical JournalIn kinetic theory, the classic n Σ v approach calculates the rate of particle interactions from local quantities: the number density of particles n , the cross section Σ, and the average relative speed v .
Elisha Modelevsky +2 more
doaj +1 more source
, 1998 Numerical integrations in celestial mechanics often involve the repeated computation of a rotation with a constant angle. A direct evaluation of these rotations yields a linear drift of the distance to the origin.
Danby +11 more
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Transactions of the Institute of British Geographers, EarlyView.ABSTRACT AI assistants on spacecrafts. Netflix streamed through inter‐planetary communication networks. Colonies on Mars by 2050. While the glamorous public–private ventures into outer space curate discussions on the technical specificities of these proposed projects, this paper reorients discussions on such developments through critical frameworks of ...
Yung Au
wiley +1 more source
The three-body problem and the Hannay angle
, 2004 The Hannay angle has been previously studied for a celestial circular restricted three-body system by means of an adiabatic approach. In the present work, three main results are obtained.
Alessandro D A M Spallicci +13 more
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Neural Networks for Space Debris Classification
Expert Systems, Volume 43, Issue 1, January 2026.ABSTRACT Significant research in the field of space domain awareness (SDA) has focused on improving AI‐driven data processing and classification tasks. Previous studies have explored the classification of orbiting man‐made object types such as satellites, rocket bodies, and debris, yet there is a noticeable gap in the literature concerning the ...
Anne Adriano +4 more
wiley +1 more source
Time's Arrow: New Music Ensemble, April 6, 2005 [PDF]
, 2005 This is the concert program of the Time's Arrow performance on Wednesday, April 6, 2005 at 8:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were Piece for solo trumpet by Stefan Wolpe, The Andrèe Expedition by Dominick Argento ...
School of Music, Boston University
core
Stability of axial orbits in galactic potentials
, 2006 We investigate the dynamics in a galactic potential with two reflection symmetries. The phase-space structure of the real system is approximated with a resonant detuned normal form constructed with the method based on the Lie transform.
A. Dragt +21 more
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ChemPlusChem, Volume 90, Issue 12, December 10, 2025.The image illustrates a multi‐technique analysis of Islamic‐African manuscripts from the nineteenth to twentieth centuries. It highlights methods like microscopy, hyperspectral imaging, FTIR, LIF, Raman, LIBS, and furnish analysis used to study paper fibers, inks, and dyes—revealing a blend of local and trade materials and a rich fusion of Qur’anic and
Abdelrazek Elnaggar +12 more
wiley +1 more source