Results 131 to 140 of about 5,920 (280)
Existence of periodic orbits for vector fields via Fuller index and the averaging method
Electronic Journal of Differential Equations, 2004 We prove a generalization of a theorem proved by Seifert and Fuller concerning the existence of periodic orbits of vector fields via the averaging method. Also we show applications of these results to Kepler motion and to geodesic flows on spheres.
Pierluigi Benevieri +2 more
doaj
MathematicsIn this study, We explore for Minkowski 3-space E13 harmonic surfaces’ geometric features by employing a common tangent vector field along a curve situated on the surface.
Emad Solouma +2 more
doaj +1 more source
Modeling sliding cables and geodesic lines through dynamic relaxation [PDF]
, 2010 p. 2047-2058The Dynamic Relaxation Method (DRM) is an interesting alternative to solve complicated nonlinear equilibrium problems, solved via a pseudo-dynamic analysis, with explicit time integration, carried out exclusively by fast vector ...
PAULETTI, Ryu M. O. +2 more
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International Journal of Ceramic Engineering &Science, Volume 8, Issue 4, July 2026.Cracking in brittle TPMS structures is governed by their geometry, with cracks propagating along geodesic paths determined by the initial crack orientation. Regions with small cross‐sections and abrupt area transitions identify critical damage regions and explain the differences in compressive strength among Primitive, Gyroid, Neovius, and IWP designs.
Thi Ngoc Diep Tran +2 more
wiley +1 more source
On Twisted Spacetimes: a new class of Galilean cosmological models
Advanced Nonlinear StudiesWithin the generalized Newton-Cartan theory, Galilean Twisted spacetimes are introduced as dual models of the well-known relativistic twisted spacetimes.
de la Fuente Daniel +2 more
doaj +1 more source
Beyond Average Hive Performance: Tail Risk Measurement in Italian Apiculture With Honey‐at‐Risk
Environmetrics, Volume 37, Issue 5, July 2026.ABSTRACT This paper provides a framework for measuring honey‐production risk that complements standard mean‐based analyses by explicitly targeting downside tail risk. Using hive‐weight data from a large sample of Italian hives over the period 2021–2024, downside tail risk is quantified through the Honey‐at‐Risk (HaR) metric, defined as the quantile of ...
Alessio Brini +3 more
wiley +1 more source
Some aspects of normal curve on smooth surface under isometry
Demonstratio MathematicaThe normal curve is a space curve that plays an important role in the field of differential geometry. This research focuses on analyzing the properties of normal curves on smooth immersed surfaces, considering their invariance under isometric ...
Singh Kuljeet +2 more
doaj +1 more source
MathematicsWe consider the two- and n-body problems on the two-dimensional conformal sphere MR2, with a radius R>0. We employ an alternative potential free of singularities at antipodal points.
Rubén Darío Ortiz Ortiz +2 more
doaj +1 more source
, 2011 Roboticists have shown a great interest in designing and building robotic hands, mainly because of the complex structure and high range of functionalities that the human hand has.
Rusu, Alexandru
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Role of Volcano‐Tectonic Interactions During Early‐Phase Magma‐Assisted Continental Rifting
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.Abstract We study volcanic‐tectonic interactions during the early phase of rifting in the Natron Rift, a magmatic segment of the East African Rift System. We use the open‐source crustal deformation modeling code, PyLith, to model deflation during the 2007–2008 explosive eruptions and inflation during 2016–2023.
Ntambila Daud +5 more
wiley +1 more source