Results 41 to 50 of about 45,218 (214)
Statistical Theory of Asteroid Escape Rates [PDF]
, 2002 Transition states in phase space are identified and shown to regulate the rate of escape of asteroids temporarily captured in circumplanetary orbits.
Farrelly, David +5 more
core +2 more sources
Perspective Projection of an Ellipse and an Ellipsoid for Analytical View Factor Evaluation
Heat Transfer, EarlyView.ABSTRACT Radiative view factors are fundamental quantities for evaluating radiative heat transfer between different surfaces. While analytical expressions of view factors have been evaluated for various types of basic geometries, including circular disks and spheres, extending these solutions to more complex geometries, such as ellipses and ellipsoids ...
Kaname Sasaki
wiley +1 more source
Mid‐Infrared Integrated Photonics: Material Platforms and Emerging Applications
Laser &Photonics Reviews, EarlyView.Mid‐infrared (MIR) integrated photonics enables advanced chemical and biological sensing through the unique absorption features of molecules in the 2–20 µm range. This review highlights recent material advances such as chalcogenide glasses, silicon, and graphene and explores MIR applications in environmental monitoring, medical diagnostics ...
Muhammad Ali Butt +2 more
wiley +1 more source
Modelling in Science Education and Learning, 2013 The solutions of the equations of motion for a point mass particle under a conservative force field are generally constrained by a basic set of integrals of motion, which depend on the knowledge about the potential function and on time and space ...
Rafael Cubarsi
doaj +1 more source
Interaction between celestial and terrestrial reference frames and some considerations for the next VLBI-based ICRF [PDF]
, 2014 In this paper we outline several problems related to the realization of the international celestial and terrestrial reference frames ICRF and ITRF at the millimeter level of accuracy, with emphasis on ICRF issues. The main topics considered are: analysis
Lambert, Sebastien +3 more
core
Metasurfaces in Adaptive Optics: A New Opportunity in Optical Wavefront Sensing
Laser &Photonics Reviews, EarlyView.Wavefront sensing constitutes a critical component of adaptive optics systems, aimed at quantitatively measuring distorted wavefronts and enabling closed‐loop correction in optical setups. Metasurfaces, as planar optical elements composed of nanoscale structures, provide exceptional freedom in modulating multiple dimensions of the light field.
Rundong Fan +3 more
wiley +1 more source
Third derivatives of the integrable part of an asteroid Hamiltonian [PDF]
Serbian Astronomical Journal, 2007 To apply the theorem of Nekhoroshev (1977) to asteroids, one first has to check whether a necessary geometrical condition is fulfilled: either convexity, or quasi-convexity, or only a 3-jet non-degeneracy.
Pavlović R.
doaj +1 more source
A Note on Celestial Mechanics in Kerr Spacetime
, 2014 The Hamilton-Jacobi equation for test particles in the Kerr geometry is separable. Using action-angle variables, we establish several relations between various physical quantities that characterize bound timelike geodesic orbits around a spinning black ...
Tiec, Alexandre Le
core +2 more sources
Journal of the Royal Anthropological Institute, EarlyView.This article examines how emerging generative AI technologies in Europe and North America are being used to reanimate the dead, prompting users to define the ‘edges’ of self and personhood through coding practices. These technologies invite new engagements with fundamental questions of relatedness and the construction of the self, challenging and ...
Jennifer Cearns
wiley +1 more source
War and Peace: Ogawa Takemitsu's Theological Engagement with State and Religion
Journal of Religious History, EarlyView.The Manchurian Incident of 1931 marked a pivotal moment in the rise of Japanese fascism. During the period from this incident until the Pacific War's defeat, dissent from the state's control was not tolerated, leading to coercive measures in religious communities. The Christian community, rather than devising theological reasoning to resist the state's
Eun‐Young Park, Do‐Hyung Kim
wiley +1 more source