Results 41 to 50 of about 11,157,685 (225)
On bi-Hamiltonian formulation of the perturbed Kepler problem [PDF]
, 2015 The perturbed Kepler problem is shown to be a bi-Hamiltonian system in spite of the fact that the graph of the Hamilton function is not a hypersurface of translation, which goes against a necessary condition for the existence of the bi-Hamiltonian ...
Y. Grigoryev, A. Tsiganov
semanticscholar +1 more source
Mathematics, 2023 This article is devoted to the study of the stability of movement of a satellite of finite size around the natural satellites of the planets in the solar system, using the new concept of ER3BP with variable eccentricity.
Sergey Ershkov +3 more
doaj +1 more source
Journal of Applied Polymer Science, EarlyView.The graphical abstract presents a visual representation of the sequence of processes involved in the transformation of three distinct waste streams into recyclates. This is followed by a detailed examination of the granulate properties resulting from these processes.
J. Langwieser, S. Czaker, J. Fischer
wiley +1 more source
Harnessing entomopathogenic fungi: A meta‐analysis on their role as plant growth promoters
PLANTS, PEOPLE, PLANET, EarlyView.Our meta‐analysis highlights the potential of entomopathogenic fungi (EPF) as sustainable alternatives to chemical pesticides and fertilisers. By promoting plant growth and reducing reliance on agrochemicals, EPF can support healthier crops, minimise environmental contamination and improve profitability within food production systems.
Luke A. Crosby +2 more
wiley +1 more source
Bertrand’s theorem and the double copy of relativistic field theories
Journal of High Energy PhysicsWhich relativistic field theories give rise to Kepler dynamics in the two-body problem? We consider a class of Hamiltonians that is the unique relativistic extension of the Kepler problem preserving its so(4) algebra, and have orbits related through time
Dijs de Neeling +3 more
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The Chemical Record, EarlyView.The radical Pietist Johann Conrad Dippel was a self‐proclaimed adept – a maker of gold and the philosophers’ stone. He was also a magister of theology, a doctor of medicine, and a self‐taught chemist, who coinvented the pigment Prussian Blue together with Johann von Diesbach, became known for his animal pyrolysis oil, his wonder‐wound balm, his ...
Curt Wentrup
wiley +1 more source
Accounting &Finance, EarlyView.ABSTRACT Enterprise risk management (ERM) may help firms balance tensions between explorative and exploitative innovation, thus achieving organisational ambidexterity. However, this potential effect has not yet been empirically examined by prior research.
Thomas M. Brunner‐Kirchmair +1 more
wiley +1 more source
Three-Body 3D-Kepler Electromagnetic Problem—Existence of Periodic Solutions
AppliedMathThe main purpose of the present paper is to prove the existence of periodic solutions of the three-body problem in the 3D Kepler formulation. We have solved the same problem in the case when the three particles are considered in an external inertial ...
Vasil Georgiev Angelov
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Journal of Nigerian Society of Physical Sciences, 2023 It is a known fact that in most cases, to integrate an oscillatory problem, higher order A-stable methods are often needed. This is because such problems are characterized by stiffness, chaos and damping, thus making them tedious to solve.
Joshua Sunday +2 more
doaj +1 more source
Team teachers' lesson‐specific emotions and perceived instructional quality—Results of a diary study
British Journal of Educational Psychology, EarlyView.Abstract Background Team teaching is a common practice in many schools. However, there is a lack of empirical evidence on how teachers' positive and negative affect triggered by their team‐teaching partners is related to the (perceived) instructional quality.
Gerda Hagenauer +3 more
wiley +1 more source