324,885 research outputs found
Charge transfer in dissociating iodomethane and fluoromethane molecules ionized by intense femtosecond X-ray pulses
No full textCitation: Boll, R., Erk, B., Coffee, R., Trippel, S., Kierspel, T., Bomme, C., . . . Rudenko, A. (2016). Charge transfer in dissociating iodomethane and fluoromethane molecules ionized by intense femtosecond X-ray pulses. Structural Dynamics, 3(4). doi:10.1063/1.4944344Additional Authors: Marchenko, T.;Miron, C.;Patanen, M.;Osipov, T.;Schorb, S.;Simon, M.;Swiggers, M.;Techert, S.;Ueda, K.;Bostedt, C.;Rolles, D.;Rudenko, A.Ultrafast electron transfer in dissociating iodomethane and fluoromethane molecules was studied at the Linac Coherent Light Source free-electron laser using an ultraviolet-pump, X-ray-probe scheme. The results for both molecules are discussed with respect to the nature of their UV excitation and different chemical properties. Signatures of long-distance intramolecular charge transfer are observed for both species, and a quantitative analysis of its distance dependence in iodomethane is carried out for charge states up to I21+. The reconstructed critical distances for electron transfer are in good agreement with a classical over-the-barrier model and with an earlier experiment employing a near-infrared pump pulse. © 2016 Author(s)
Creativity M. Rudenko in Philosophical Discourse Twentieth Century
No full textУ статті проаналізовано науково-фантастичні та художні романи М. Руденка і доведено, що твори належать до жанру філософського роману. Аналіз основних філософських ідей М. Руденка показує, що митець у своїх творах понад усе ставить Людину. Основна тема художніх творів автора – пошук сенсу людського існування. У науково-фантастичних романах автора реалізація філософських ідей проходить як апологія авторської філософської теорії. Окремим питанням розглянуто філософську працю М. Руденка «Гносис і сучасність», де автор подає на розсуд читачеві власну філософську теорію світобудови.In the article explores the science-fiction novels and artwork N. Rudenko and proved that the works belong to the genre of the philosophical novel. Analysis of the main philosophical ideas of Rudenko shows the artist in his work above all became a man . The main theme of fiction author - search for the meaning of human existence. In science fiction novels by the realization of philosophical ideas is how the author's apology philosophical theory. Another issue deals with the philosophical work of M. Rudenko «Gnosis and Modernity», where the author takes the reader to the discretion of his own philosophical theory of the universe
Communication: X-ray coherent diffractive imaging by immersion in nanodroplets
No full textCitation: Tanyag, R. M. P., Bernando, C., Jones, C. F., Bacellar, C., Ferguson, K. R., Anielski, D., . . . Vilesov, A. F. (2015). Communication: X-ray coherent diffractive imaging by immersion in nanodroplets. Structural Dynamics, 2(5), 9. doi:10.1063/1.4933297Lensless x-ray microscopy requires the recovery of the phase of the radiation scattered from a specimen. Here, we demonstrate a de novo phase retrieval technique by encapsulating an object in a superfluid helium nanodroplet, which provides both a physical support and an approximate scattering phase for the iterative image reconstruction. The technique is robust, fast-converging, and yields the complex density of the immersed object. Images of xenon clusters embedded in superfluid helium droplets reveal transient configurations of quantum vortices in this fragile system. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.Additional Authors: Neumark, D. M.;Rolles, D.;Rudek, B.;Rudenko, A.;Siefermann, K. R.;Ullrich, J.;Weise, F.;Bostedt, C.;Gessner, O.;Vilesov, A. F
Three-Dimensional Reconstruction of the Giant Mimivirus Particle with an X-Ray Free-Electron Laser
No full textCitation: Ekeberg, T., Svenda, M., Abergel, C., Maia, F., Seltzer, V., Claverie, J. M., . . . Hajdu, J. (2015). Three-Dimensional Reconstruction of the Giant Mimivirus Particle with an X-Ray Free-Electron Laser. Physical Review Letters, 114(9), 6. doi:10.1103/PhysRevLett.114.098102We present a proof-of-concept three-dimensional reconstruction of the giant mimivirus particle from experimentally measured diffraction patterns from an x-ray free-electron laser. Three-dimensional imaging requires the assembly of many two-dimensional patterns into an internally consistent Fourier volume. Since each particle is randomly oriented when exposed to the x-ray pulse, relative orientations have to be retrieved from the diffraction data alone. We achieve this with a modified version of the expand, maximize and compress algorithm and validate our result using new methods.Additional Authors: Andersson, I.;Loh, N. D.;Martin, A. V.;Chapman, H.;Bostedt, C.;Bozek, J. D.;Ferguson, K. R.;Krzywinski, J.;Epp, S. W.;Rolles, D.;Rudenko, A.;Hartmann, R.;Kimmel, N.;Hajdu, J
Imaging single cells in a beam of live cyanobacteria with an X-ray laser
No full textCitation: van der Schot, G., Svenda, M., Maia, F., Hantke, M., DePonte, D. P., Seibert, M. M., . . . Ekeberg, T. (2015). Imaging single cells in a beam of live cyanobacteria with an X-ray laser. Nature Communications, 6, 9. doi:10.1038/ncomms6704There exists a conspicuous gap of knowledge about the organization of life at mesoscopic levels. Ultra-fast coherent diffractive imaging with X-ray free-electron lasers can probe structures at the relevant length scales and may reach sub-nanometer resolution on micron-sized living cells. Here we show that we can introduce a beam of aerosolised cyanobacteria into the focus of the Linac Coherent Light Source and record diffraction patterns from individual living cells at very low noise levels and at high hit ratios. We obtain two-dimensional projection images directly from the diffraction patterns, and present the results as synthetic X-ray Nomarski images calculated from the complex-valued reconstructions. We further demonstrate that it is possible to record diffraction data to nanometer resolution on live cells with X-ray lasers. Extension to sub-nanometer resolution is within reach, although improvements in pulse parameters and X-ray area detectors will be necessary to unlock this potential.Additional Authors: Almeida, N. F.;Odic, D.;Hasse, D.;Carlsson, G. H.;Larsson, D. S. D.;Barty, A.;Martin, A. V.;Schorb, S.;Bostedt, C.;Bozek, J. D.;Rolles, D.;Rudenko, A.;Epp, S.;Foucar, L.;Rudek, B.;Hartmann, R.;Kimmel, N.;Holl, P.;Englert, L.;Loh, N. T. D.;Chapman, H. N.;Andersson, I.;Hajdu, J.;Ekeberg, T
Monadology G. Leibniz, M. Bugayov, M. Rudenko: Сomparative Analysis
No full textУ розвідці зроблено порівняльну характеристику теорії монад Г. Лейбніца, М. Бугайова, М. Руденка. Визначено точки дотику та відмінності у міркуваннях вчених. Доведено унікальність теорії монад М. Руденка, який першим у світовій науці вивів фізичні характеристики Монади: вирахував радіус, масу, густину, енергію та довів, що Монада може ущільнюватися та створювати гравітаційне поле.The comparative analysis of the theory of the monads of G. Leibniz, M. Bugayov, M. Rudenko is made. The points of contact and differences in the reasoning of scientists are determined. The uniqueness of the theory of monads of M. Rudenko was proved, which was the first in world science to bring out the physical characteristics of the Monad: he calculated the radius, mass, density, energy and proved that the Monad can be densified and create a gravitational field
Monadology of Mykola Rudenko: Uniqueness and Originality of Scientific Platform
No full textУ розвідці доведено унікальність теорії монад М. Руденка, який першим у світовій науці вивів фізичні характеристики Монади: вирахував радіус, масу, густину, енергію та довів, що Монада може ущільнюватися та створювати гравітаційне поле. Теорія Монад українського філософа пропонує як альтернативну стаціонарну (на відміну від відомої нам ізотропної) модель Всесвіту, у якій все ґрунтується на принципі загального порядку без жодних випадковостей.Monadology is not a new science. The beginning to it was given by ancient gnostics. G. Leibniz was its founder. The developers of science of Monads are considered to be M. Bugayev, P. Florensky and others, but only M. Rudenko managed to impose geocentric standards of modern physics on concepts that for a long time were attributed to metaphysics. M. Rudenko, the first in the world of science, gave physical characteristics of the Monad: he calculated the radius, mass, density, energy and proved that the Monad can thicken and create a gravitational field.
M. Rudenko offers a stationary (unlike known isotropic) model of the Universe, in which everything is based on the principle of general order without any eventualities. Thickening and rarefaction of vacuum is the beginning of the Spheres, the birth of the Monad. Monad is pushing the Universe to win space for itself. Monad, or Nine: six forces that create the Sphere, and three additional ones – Free Light, Light Creator. The Light is spilled inside the Monads. The Monad should be seen as the Spirit Matter. There are no other realities in the world except the Monads. The thinker proves that life on the Earth does not originate from the Sun but from the World Monad. M. Rudenko did not completely remove the veil of mystery, but pointed out the alternative direction of scientific research, pointed to the lack of knowledge, that today is an obstacle to finding out the phenomenon of the Universe
4. Rudenko (S. I.) Der zweite Kurgan von Pasyryk (Gesellschaft für deutsch-sowjetische Freundschaft, 16. Beiheft). Verlag Kultur und Fortschritt, Berlin, 1951
No full textPicard-Schmitter Marie-Thérèse. 4. Rudenko (S. I.) Der zweite Kurgan von Pasyryk (Gesellschaft für deutsch-sowjetische Freundschaft, 16. Beiheft). Verlag Kultur und Fortschritt, Berlin, 1951. In: Revue des Études Grecques, tome 67, fascicule 314-315, Janvier-juin 1954. pp. 268-269
Photo-induced plasma confinement in ultrashort laser-excited nanostructures
No full textInternational audienceIntense ultrashort lasers modify transient optical properties of transparent materials, converting them into cold plasma non-equilibrium state of matter. This electron-hole plasma can be confined to subwavelength nanoscale dimensions by tightly focused laser beams but remains challenging to control due to complexity of ultrashort pulse propagation in nonlinear medium and is mainly associated with laser material damage in laser processing [1]. Subwavelength nanostructures and their periodic planar arrangements (metasurfaces) enable not only plasma confinement on record nanoscales by ultrashort laser excitation [2] but also better control over the nonlinear optical response while resisting to material damage [3], which is promising for new-generation optical devices for light manipulation and modulation.Modeling of the involved physical processes remains challenging, as it requires coupling non-paraxial full-vector light propagation in nonlinear medium with a comprehensive model for electronic excitation and material ionization at high intensities. Laser interaction with subwavelength nanostructures is discussed in the frame of 3D plasma fluid model coupled with nonlinear Maxwell propagation solver. Simulation results elucidate the spatio-temporal aspects of the electron-hole plasmas and their influence on ultrashort pulse propagation and harmonic generation.Apart from numerous applications relying on transient optical properties, plasma nanoconfinement in nanostructured transparent materials opens new opportunities for controlling thermal gradients, melt flow, and ablation at the nanoscale, with the ultimate objective to develop new strategies for nanofabrication and adjustment of metasurfaces.Références[1] A. Rudenko, J. V. Moloney, and P. Polynkin, Phys. Rev. Appl., Vol. 20, 064035 (2023)[2] A. Rudenko, K. Ladutenko, S. Makarov, and T. E. Itina, Adv. Opt. Mater., Vol. 7, 12306 (2018)[3] A. Rudenko, A. Han, and J. V. Moloney, Adv. Opt. Mater., Vol. 11, 2, 2201654 (2023
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