Results 31 to 40 of about 7,093,462 (324)

The Difference in Wave Dynamics between SARS-CoV-2 Pre-Omicron and Omicron Variant Waves

COVID, 2022
Compared to previous SARS-CoV-2 variants, the Omicron variant exhibited different epidemiological features. The purpose of this study was to assess the wave dynamics of pre-Omicron and Omicron waves in terms of differences and similarities.
Franz Konstantin Fuss, Yehuda Weizman, Adin Ming Tan   +2 more
doaj   +1 more source

Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells

Scientific Reports, 2021
We performed finite-element micromagnetic simulations to examine the formation of skyrmions without intrinsic Dzyaloshinskii–Moriya interaction (DMI) in magnetic hemispherical shells. We found that curvature-induced DM-like interaction allows for further
Jaehak Yang, Claas Abert, Dieter Suess, Sang-Koog Kim   +3 more
doaj   +1 more source

An Analytical Solution to the Problem of Hydrogen Isotope Passage through Composite Membranes Made from 2D Materials

Mathematics, 2021
An analytical solution to the problem of wave transport of matter through composite hyper-fine barriers is constructed. It is shown that, for a composite membrane consisting of two identical ultra-thin layers, there are always distances between the ...
Alexey Mikhailovich Bubenchikov, Mikhail Alekseevich Bubenchikov, Anna Sergeevna Chelnokova, Soninbayar Jambaa   +3 more
doaj   +1 more source

Performance of a Rotating Detonation Rocket Engine with Various Convergent Nozzles and Chamber Lengths

Energies, 2021
A rotating detonation rocket engine (RDRE) with various convergent nozzles and chamber lengths is investigated. Three hundred hot-fire tests are performed using methane and oxygen ranging from equivalence ratio equaling 0.5–2.5 and total propellant flow ...
John W. Bennewitz, Blaine R. Bigler, Mathias C. Ross, Stephen A. Danczyk, William A. Hargus, Richard D. Smith   +5 more
doaj   +1 more source

Analysis of the Viscoelastic Sphere Impact against a Viscoelastic Uflyand-Mindlin Plate considering the Extension of Its Middle Surface

Shock and Vibration, 2017
In the present paper, the problem on impact of a viscoelastic sphere against a viscoelastic plate is considered with due account for the extension of plate’s middle surface and local bearing of sphere and plate’s materials via the Hertz theory.
Yury A. Rossikhin, Marina V. Shitikova, Phan Thanh Trung   +2 more
doaj   +1 more source

A New Approach for Studying Nonlinear Dynamic Response of a Thin Plate with Internal Resonance in a Fractional Viscoelastic Medium

Shock and Vibration, 2015
In the previous analysis, the dynamic behaviour of a nonlinear plate embedded into a fractional derivative viscoelastic medium has been studied by the method of multiple time scales under the conditions of the internal resonances two-to-one and one-to ...
Yury A. Rossikhin, Marina V. Shitikova, Jean Claude Ngenzi   +2 more
doaj   +1 more source

Compatibility of localized wave packets and unrestricted single particle dynamics for cluster formation in nuclear collisions [PDF]

, 2002
Antisymmetrized molecular dynamics with quantum branching is generalized so as to allow finite time duration of the unrestricted coherent mean field propagation which is followed by the decoherence into wave packets.
A. Chbihi, A. Ohnishi, A. Ohnishi, A. Ono, A. Ono, A. Ono, A. Ono, A. Ono, Akira Ono, B.L. Holian, D. Kiderlen, F. Pühlhofer, G.F. Bertsch, G.Q. Li, G.Q. Li, H. Feldmeier, J. Aichelin, J. D. Frankland, J. Dechargé, J. Randrup, M. Colonna, M. Papa, Qin Zhi, R. Nebauer, R. Wada, R. Wada, S. Ayik, S. Ayik, S. Chikazumi, S. Hudan, Toshiki Maruyama, Toshiki Maruyama, W. Cassing, W.H. Zurek, Y. Kanada-En’yo, Y. Tosaka   +35 more
core   +4 more sources

Geomagnetic acceleration and rapid hydromagnetic wave dynamics in advanced numerical simulations of the geodynamo [PDF]

, 2018
Geomagnetic secular acceleration, the second temporal derivative of the Earth's magnetic field, is a unique window on the dynamics taking place in the Earth's core.
J. Aubert
semanticscholar   +1 more source

Mode structure and ray dynamics of a parabolic dome microcavity [PDF]

, 2000
We consider the wave and ray dynamics of the electromagnetic field in a parabolic dome microcavity. The structure of the fundamental s-wave involves a main lobe in which the electromagnetic field is confined around the focal point in an effective volume ...
A.E. Siegman, C. Gmachl, D.J. Heinzen, F.M. Matinaga, G. Björk, H. Laabs, H. Waalkens, H. Waalkens, H. Weyl, H. Weyl, I. Abram, J.B. Keller, J.B. Keller, J.U. Nöckel, J.U. Nöckel, J.U. Nöckel, L. Collot, L.E. Reichl, M. Kerker, M. Sieber, M.C. Gutzwiller, M.S. Child, P.H. Richter, P.J. Richens, R. Arvieu, R. Balian, R. Balian, R.E. Slusher, S.L. McCall, Y. Yamamoto   +29 more
core   +5 more sources

On the Explicit Function of Life within a Physical Universe

Philosophies, 2021
To describe the meaning of functionality in a universe before life evolved, existing etiological and systemic accounts of function are evaluated. Since the theory of function is only applicable in context with living beings and artifacts used by living ...
Annette Grathoff
doaj   +1 more source