Results 81 to 90 of about 688,478 (251)

Higher Order Approximation to the Hill Problem Dynamics about the Libration Points

, 2018
An analytical solution to the Hill problem Hamiltonian expanded about the libration points has been obtained by means of perturbation techniques. In order to compute the higher orders of the perturbation solution that are needed to capture all the ...
Lara, Martin, López, Rosario, Pérez, Iván L.   +2 more
core   +1 more source

Regional onset of Holocene drying period estimated from sand deposit analyses in Kharga Oasis, Western Desert, Egypt

Journal of Quaternary Science, EarlyView.
ABSTRACT Desertification in North Africa has progressed rapidly over the past 6000 years. The occupation of Egypt by the Achaemenid Persians and Romans occurred even in hyperarid climates. Understanding the process of environmental changes on a regional scale may improve knowledge of how people developed technologies and adapted to the natural ...
Makiko Watanabe, Hiroyuki Kamei
wiley   +1 more source

Gauge Freedom in Orbital Mechanics

, 2006
In orbital and attitude dynamics the coordinates and the Euler angles are expressed as functions of the time and six constants called elements. Under disturbance, the constants are endowed with time dependence.
Efroimsky, Michael
core   +1 more source

Low‐Frequency Raman Spectroscopy of Polymers

Macromolecular Chemistry and Physics, EarlyView.
Recent advances have made low‐frequency Raman spectroscopy accessible to the wider scientific community. This review discusses how low‐frequency Raman is particularly useful for researchers investigating polymers because the technique can help determine both the local and long‐range structure of materials, their thermodynamic properties, and their ...
Kayla A. Bensley, Robert V. Chimenti, Samuel E. Lofland   +2 more
wiley   +1 more source

Forced magnetic reconnection and plasmoid coalescence: I - MHD Simulations

, 2019
Forced magnetic reconnection, a reconnection event triggered by external perturbation, should be ubiquitous in the solar corona. Energy released during such cases can be much greater than that which was introduced by the perturbation.
Browning, Philippa, Gordovskyy, Mykola, Potter, Max   +2 more
core   +1 more source

Model and Characterization of Persistence in HgCdTe SWIR Detectors for Astronomy Application

Journal of Electronic Materials, 2022
T. Le Goff, T. Pichon, N. Baier, O. Gravrand, O. Boulade   +4 more
semanticscholar   +1 more source

Application of Variable Step‐Size Hybrid Methods for Solving Third‐Order Lane‐Emden Equations

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This manuscript introduces a pair of variable step‐size hybrid methods (PVSHM) to efficiently solve third‐order initial value problems of Lane‐Emden‐type equations (LETE). These equations are extensively used across various disciplines, including chemical engineering, fluid mechanics, physics, and astrophysics, to model a wide range of real ...
Mufutau Ajani Rufai, Thanh Tran, Bruno Carpentieri, Higinio Ramos   +3 more
wiley   +1 more source

Gravitational wave astronomy: the definitive test for the "Einstein frame versus Jordan frame" controversy

, 2010
The potential realization of a gravitational wave (GW) astronomy in next years is a great challenge for the scientific community. By giving a significant amount of new information, GWs will be a cornerstone for a better understanding of the universe and ...
Barrow, Brans, Capozziello, Capozziello, Capozziello, Capozziello, Cho, Christian Corda, Cognola, Corda, Damour, Dicke, Elizalde, Esposito-Farese, Fierz, Fujii, Garriga, Green, Guth, Hulse, Jordan, Klimek, Lyth, Magnano, Mimoso, Misner, Novak, Roshan, Salgado, Santiago, Scharre, Sokolowski, Teyssandier, Wagoner, Wald, Watson, Will, Will   +37 more
core   +1 more source

Feasibility of strong diffusion encoding and fast readout using a plug‐and‐play head gradient insert at 7 T

Magnetic Resonance in Medicine, EarlyView.
Purpose Diffusion weighting is achieved by the application of external field gradients typically for tens of milliseconds, during which the signal also substantially decays due to inherent T2 relaxation. Employing strong gradients will shorten the echo time (TE) and increase the signal‐to‐noise ratio.
G. C. Arends, E. Versteeg, A. De Luca, F. Marc, T. H. M. Roos, D. W. J. Klomp, M. Froeling, J. C. W. Siero, C. M. W. Tax   +8 more
wiley   +1 more source

Gravitomagnetic time-varying effects on the motion of a test particle

, 2010
We study the effects of a time-varying gravitomagnetic field on the motion of test particles. Starting from recent results, we consider the gravitomagnetic field of a source whose spin angular momentum has a linearly time-varying magnitude.
A. Lyne, B. Mashhoon, B. Mashhoon, C. Chicone, D. Bini, D. Lorimer, D.P. Rubincam, L. Iorio, L. Iorio, L.F.O. Costa, Lorenzo Iorio, M. Burgay, M.L. Ruggiero, Matteo Luca Ruggiero   +13 more
core   +1 more source