Acceder

Bibliografías temáticas / Fast BEMs / Artículos de revistas

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Fast BEMs.

Artículos de revistas sobre el tema "Fast BEMs"

Autor: Grafiati

Publicado: 23 de noviembre de 2024

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores artículos de revistas para su investigación sobre el tema "Fast BEMs".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore artículos de revistas sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Chaillat, S., J. F. Semblat y M. Bonnet. "A Preconditioned 3-D Multi-Region Fast Multipole Solver for Seismic Wave Propagation in Complex Geometries". Communications in Computational Physics 11, n.º 2 (febrero de 2012): 594–609. http://dx.doi.org/10.4208/cicp.231209.030111s.

Texto completo

Resumen

AbstractThe analysis of seismic wave propagation and amplification in complex geological structures requires efficient numerical methods. In this article, following up on recent studies devoted to the formulation, implementation and evaluation of 3-D single- and multi-region elastodynamic fast multipole boundary element methods (FM-BEMs), a simple preconditioning strategy is proposed. Its efficiency is demonstrated on both the single- and multi-region versions using benchmark examples (scattering of plane waves by canyons and basins). Finally, the preconditioned FM-BEM is applied to the scattering of plane seismic waves in an actual configuration (alpine basin of Grenoble, France), for which the high velocity contrast is seen to significantly affect the overall efficiency of the multi-region FM-BEM.

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Fontana, Marco, Pietro Casalone, Sergej Antonello Sirigu, Giuseppe Giorgi, Giovanni Bracco y Giuliana Mattiazzo. "Viscous Damping Identification for a Wave Energy Converter Using CFD-URANS Simulations". Journal of Marine Science and Engineering 8, n.º 5 (17 de mayo de 2020): 355. http://dx.doi.org/10.3390/jmse8050355.

Texto completo

Resumen

During the optimization phase of a wave energy converter (WEC), it is essential to be able to rely on a model that is both fast and accurate. In this regard, Computational Fluid Dynamic (CFD) with Reynolds Averaged Navier–Stokes (RANS) approach is not suitable for optimization studies, given its computational cost, while methods based on potential theory are fast but not accurate enough. A good compromise can be found in boundary element methods (BEMs), based on potential theory, with the addition of non-linearities. This paper deals with the identification of viscous parameters to account for such non-linearities, based on CFD-Unsteady RANS (URANS) analysis. The work proposes two different methodologies to identify the viscous damping along the rotational degree of freedom (DOF) of pitch and roll: The first solely involves the outcomes of the CFD simulations, computing the viscous damping coefficients through the logarithmic decrement method, the second approach solves the Cummins’ equation of motion, via a Runge-Kutta scheme, selecting the damping coefficients that minimize the difference with CFD time series. The viscous damping is mostly linear for pitch and quadratic for roll, given the shape of the WEC analysed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

MENG, WENHUI y JUNZHI CUI. "COMPARATIVE STUDY OF TWO DIFFERENT FMM–BEM METHODS IN SOLVING 2-D ACOUSTIC TRANSMISSION PROBLEMS WITH A MULTILAYERED OBSTACLE". International Journal of Structural Stability and Dynamics 11, n.º 01 (febrero de 2011): 197–214. http://dx.doi.org/10.1142/s021945541100404x.

Texto completo

Resumen

The fast multipole method (FMM) is an effective approach for accelerating the computation efficiency of the boundary element method (BEM) in solving problems that are computationally intensive. This paper presents two different BEMs, i.e., Kress' and Seydou's methods, for solving two-dimensional (2D) acoustic transmission problems with a multilayered obstacle, along with application of the FMM to solution of the related boundary integral equations. Conventional BEM requires O(MN2) operations to compute the equations for this problem. By using the FMM, both the amount of computation and the memory requirement of the BEM are reduced to order O(MN), where M is the number of layers of the obstacle. The efficiency and accuracy of this approach in dealing with the acoustic transmission problems containing a multilayered obstacle are demonstrated in the numerical examples. It is confirmed that this approach can be applied to solving the acoustic transmission problems for an obstacle with multilayers.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Renard-Le Galloudec, N. y E. D'Humieres. "New micro-cones targets can efficiently produce higher energy and lower divergence particle beams". Laser and Particle Beams 28, n.º 3 (septiembre de 2010): 513–19. http://dx.doi.org/10.1017/s0263034610000510.

Texto completo

Resumen

AbstractSmall conical targets have been used in high intensity laser target interaction mostly in the context of fast ignition. We demonstrate that when cone targets are shaped appropriately and used with specific interaction conditions, they can produce particle beams of higher maximum energy and number in a lower angular divergence than flat targets. This is relevant to fast ignition, small compact particle beams, medical applications, focused ion and/or electron beam microscopes. This fact carries the potential to produce particle beams that are no longer limited by the characteristics of the laser. Note that for fast ignition, reducing the divergence of the beam lowers the energy requirement and enhances the energy deposition into the compressed fuel.

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Badziak, J. "Laser-driven generation of fast particles". Opto-Electronics Review 15, n.º 1 (1 de enero de 2007): 1–12. http://dx.doi.org/10.2478/s11772-006-0048-3.

Texto completo

Resumen

AbstractThe great progress in high-peak-power laser technology has resulted recently in the production of ps and subps laser pulses of PW powers and relativistic intensities (up to 1021 W/cm2) and has laid the basis for the construction of multi-PW lasers generating ultrarelativistic laser intensities (above 1023 W/cm2). The laser pulses of such extreme parameters make it possible to produce highly collimated beams of electrons or ions of MeV to GeV energies, of short time durations (down to subps) and of enormous currents and current densities, unattainable with conventional accelerators. Such particle beams have a potential to be applied in numerous fields of scientific research as well as in medicine and technology development. This paper is focused on laser-driven generation of fast ion beams and reviews recent progress in this field. The basic concepts and achievements in the generation of intense beams of protons, light ions, and multiply charged heavy ions are presented. Prospects for applications of laser-driven ion beams are briefly discussed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Saw, S. H. y S. Lee. "Plasma Focus Scaled for Neutrons, Soft X-Rays, Fast Ion Beams, and Fast Plasma Streams". Kathmandu University Journal of Science, Engineering and Technology 10, n.º 2 (31 de diciembre de 2014): 42–49. http://dx.doi.org/10.3126/kuset.v10i2.63653.

Texto completo

Resumen

Being an intense source of neutrons, soft x-rays, ion beams and fast plasma streams, the plasma focus promises applications such as fusion energy, advanced microlithography, materials synthesizing and testing, radiation diagnostics, medical isotopes and imaging. This paper reviews the scaling laws of neutrons, soft x-rays, ion beams and fast plasma streams derived from extensive numerical experiments conducted over the past 7 years.

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Razueva, E. V. y E. G. Abramochkin. "Fast Rotating Spiral Light Beams". EPJ Web of Conferences 103 (2015): 10011. http://dx.doi.org/10.1051/epjconf/201510310011.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Heber, O., D. Zajfman, D. Kella, Z. Vager, R. L. Watson y V. Horvat. "Molecular imaging with fast beams". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 99, n.º 1-4 (mayo de 1995): 90–93. http://dx.doi.org/10.1016/0168-583x(94)00620-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Ergun, R. E., C. W. Carlson, L. Muschietti, I. Roth y J. P. McFadden. "Properties of fast solitary structures". Nonlinear Processes in Geophysics 6, n.º 3/4 (31 de diciembre de 1999): 187–94. http://dx.doi.org/10.5194/npg-6-187-1999.

Texto completo

Resumen

Abstract. We present detailed observations of electromagnetic waves and particle distributions from the Fast Auroral SnapshoT (FAST) satellite which reveal many important properties of large-amplitude, spatially-coherent plasma structures known as "fast solitary structures" or "electron phase space holes". Similar structures have been observed in several regions of the magnetosphere including the auroral zone, plasma sheet boundary layer, and bow shock. There has been rapid theoretical progress in understanding these structures. Solitary structures can develop from bidirectional electron beams. Once developed, the one-dimensional properties parallel to the magnetic field can be adequately described by analytical treatment as BGK structures. There remains, however, several unanswered questions. The origin of the bidirectional electron beams, the development of two-or three-dimensional structures, and the observed association with the ion cyclotron frequency are not well understood.

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Schatz, Hendrik. "Nuclear astrophysics with fast radioactive beams". Journal of Physics G: Nuclear and Particle Physics 31, n.º 10 (12 de septiembre de 2005): S1633—S1638. http://dx.doi.org/10.1088/0954-3899/31/10/046.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Honrubia, J. J., C. D. Enriquez, J. C. Fernández y M. Hegelich. "Fast ignition by quasimonoenergetic ion beams". EPJ Web of Conferences 59 (2013): 03013. http://dx.doi.org/10.1051/epjconf/20135903013.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Gade, Alexandra. "Nuclear spectroscopy with fast exotic beams". Physica Scripta T152 (1 de enero de 2013): 014004. http://dx.doi.org/10.1088/0031-8949/2013/t152/014004.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Clark, P. U. "Fast Glacier Flow Over Soft Beds". Science 267, n.º 5194 (6 de enero de 1995): 43–44. http://dx.doi.org/10.1126/science.267.5194.43.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Hohlweck, M., T. Köble, F. Meyer, M. Ockenfels, J. Weltz y W. von Witsch. "Investigation of collimated fast-neutron beams". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 281, n.º 2 (septiembre de 1989): 277–82. http://dx.doi.org/10.1016/0168-9002(89)91325-9.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Gade, A., D. Bazin, B. A. Brown, C. M. Campbell, J. A. Church, D.-C. Dinca, J. Enders et al. "Nuclear spectroscopy with fast exotic beams". Journal of Physics: Conference Series 20 (1 de enero de 2005): 95–100. http://dx.doi.org/10.1088/1742-6596/20/1/016.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Schatz, Hendrik. "Nuclear Astrophysics with Fast Radioactive Beams". Acta Physica Hungarica A) Heavy Ion Physics 25, n.º 2-4 (1 de abril de 2006): 169–74. http://dx.doi.org/10.1556/aph.25.2006.2-4.3.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Steck, Markus. "Cooling of fast charged particle beams". Journal of the Optical Society of America B 20, n.º 5 (1 de mayo de 2003): 1016. http://dx.doi.org/10.1364/josab.20.001016.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Zhao, Shun Bo, Peng Bing Hou y Fu Lai Qu. "Laboratory Fast Corrosion Test of Plain Steel Bars in Concrete Beams". Advanced Materials Research 535-537 (junio de 2012): 1803–6. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1803.

Texto completo

Resumen

An experimental study was carried out to examine the non-uniform corrosion of plain steel bars in reinforced concrete beams partially placed in 5% sodium chloride solution under conditions of accelerated corrosion. 4 reinforced concrete beams with different concrete strength were made. The crack distributions of the beams due to pre-loads and expansion of corrosion product, and the sectional corrosion characteristics of plain steel bars are described in detail. The sectional area loss relating to mass loss and change along pure bending length of the beams are discussed. These can be used as the basis of test for further studies to build the numerical models of serviceability of corroded reinforced concrete beams.

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Liu, Zhaocai, Ziqi Song y Yi He. "Economic Analysis of On-Route Fast Charging for Battery Electric Buses: Case Study in Utah". Transportation Research Record: Journal of the Transportation Research Board 2673, n.º 5 (3 de abril de 2019): 119–30. http://dx.doi.org/10.1177/0361198119839971.

Texto completo

Resumen

Battery electric buses (BEBs) are increasingly being embraced by transit agencies as an energy-efficient and emission-free alternative to bus fleets. However, because of the limitations of battery technology, BEBs suffer from limited driving range, great battery cost, and time-consuming charging processes. On-route fast charging technology is gaining popularity as a remedy, reducing battery cost, extending driving range, and reducing charging time. With on-route fast charging, BEBs are as capable as their diesel counterparts in relation to range and operating time. However, transit agencies may have the following concerns about on-route fast charging: 1) on-route fast charging stations require massive capital costs; 2) on-route fast charging may lead to high electricity power demand charges; and 3) charging during peak hours may increase electricity energy charges. This study conducts a quantitative economic analysis of on-route fast charging for BEBs, thereby providing some guidelines for transit agencies. An integrated optimization model is first proposed to determine battery size, charger type, and recharging schedule for a general BEB route. Based on the model, an economic analysis of on-route fast charging is then performed on 10 real-world bus routes and a simplified general bus route with different parameters. The results demonstrate that given the current prices of on-route fast charging stations and batteries, it is always beneficial to install on-route fast charging stations for BEBs. A sensitivity analysis is also conducted to show the impact of potential price reductions of batteries.

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Golubev, A., M. Basko, A. Fertman, A. Kozodaev, N. Mesheryakov, B. Sharkov, A. Vishnevskiy et al. "Dense plasma diagnostics by fast proton beams". Physical Review E 57, n.º 3 (1 de marzo de 1998): 3363–67. http://dx.doi.org/10.1103/physreve.57.3363.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Saathoff, G., S. Reinhardt, B. Bernhardt, R. Holzwarth, Th Udem, T. W. Hänsch, D. Bing et al. "Testing Time Dilation on Fast Ion Beams". Journal of Physics: Conference Series 312, n.º 10 (23 de septiembre de 2011): 102014. http://dx.doi.org/10.1088/1742-6596/312/10/102014.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Madrak, R. y D. Wildman. "A fast chopper for medium energy beams". Journal of Instrumentation 9, n.º 10 (30 de octubre de 2014): T10009. http://dx.doi.org/10.1088/1748-0221/9/10/t10009.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Prisciandaro, J. I., A. C. Morton y P. F. Mantica. "Beta counting system for fast fragmentation beams". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 505, n.º 1-2 (junio de 2003): 140–43. http://dx.doi.org/10.1016/s0168-9002(03)01037-4.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Schatz, H. "Nuclear Astrophysics with Fast Rare Isotope Beams". Nuclear Physics A 787, n.º 1-4 (mayo de 2007): 299–308. http://dx.doi.org/10.1016/j.nuclphysa.2006.12.046.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Duncan, W., S. J. Arnott y J. R. Williams. "RBE in radiotherapy with fast neutron beams". British Journal of Radiology 58, n.º 690 (junio de 1985): 577. http://dx.doi.org/10.1259/0007-1285-58-690-577.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Ellis, F. y H. Weatherburn. "RBE in radiotherapy with fast neutron beams". British Journal of Radiology 58, n.º 690 (junio de 1985): 578. http://dx.doi.org/10.1259/0007-1285-58-690-578.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Wilhelm, Klaus, William Bernstein, Paul J. Kellogg y Brian A. Whalen. "Fast magnetospheric echoes of energetic electron beams". Journal of Geophysical Research: Space Physics 90, A1 (1 de enero de 1985): 491–504. http://dx.doi.org/10.1029/ja090ia01p00491.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Honrubia, J. J., J. C. Fernández, M. Temporal, B. M. Hegelich y J. Meyer-ter-Vehn. "Fast ignition by laser-driven carbon beams". Journal of Physics: Conference Series 244, n.º 2 (1 de agosto de 2010): 022038. http://dx.doi.org/10.1088/1742-6596/244/2/022038.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Anne, R., D. Bazin, R. Bimbot, M. J. G. Borge, J. M. Corre, S. Dogny, H. Emling et al. "Projectile Coulomb excitation with fast radioactive beams". Zeitschrift f�r Physik A Hadrons and Nuclei 352, n.º 4 (diciembre de 1995): 397–401. http://dx.doi.org/10.1007/bf01299757.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Adánez, J., P. Gayán, F. García-Labiano y L. F. de Diego. "Axial voidage profiles in fast fluidized beds". Powder Technology 81, n.º 3 (diciembre de 1994): 259–68. http://dx.doi.org/10.1016/0032-5910(94)02906-7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Amirav, Aviv y Shai Dagan. "Fast GC-MS in Supersonic Molecular Beams". Israel Journal of Chemistry 37, n.º 4 (1997): 475–82. http://dx.doi.org/10.1002/ijch.199700053.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Wei, Wei, Li-yun Fu y Gerrit Blacquière. "Fast multifrequency focal beam analysis for 3D seismic acquisition geometry". GEOPHYSICS 77, n.º 2 (marzo de 2012): P11—P21. http://dx.doi.org/10.1190/geo2010-0327.1.

Texto completo

Resumen

A method for the efficient computation of multifrequency focal beams for 3D seismic acquisition geometry analysis has been developed. By computing them for all the frequency components of seismic data, single-frequency focal beams can be extended to multifrequency focal beams. However, this straightforward method involves considerable computer time and memory requirements, especially in complex media settings. Therefore, we propose a rapid 3D multifrequency focal beam method in which only a few single-frequency focal beam computations are followed by a number of smart interpolations. The 3D wavefield extrapolation in the focal beam analysis is conducted by the combined applications of a 3D degenerate Fourier migrator and a 3D Born-Kirchhoff interpolation operator, a process that reduces the computational cost for complex media. The multifrequency focal beam analysis is applied to a 3D model from an oil field of China, demonstrating how spatial sampling differences affect seismic imaging.

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Cao, Jiefeng, Yong Wang, Ying Zou, Xiangzhi Zhang, Yanqing Wu y Renzhong Tai. "Optimization of the design for beamline with fast polarization switching elliptically polarized undulators". Journal of Synchrotron Radiation 23, n.º 2 (20 de febrero de 2016): 436–42. http://dx.doi.org/10.1107/s160057751600059x.

Texto completo

Resumen

Fast switching of X-ray polarization with a lock-in amplifier is a good method for acquiring weak signals from background noise for X-ray magnetic circular dichroism (XMCD) experiments. The usual way to obtain a beam with fast polarization switching is to use two series of elliptically polarized undulators (tandem twin EPUs). The two EPUs generate two individual beams. Each beam has a different polarization and is fast switched into the beamline. It is very important to ensure that the energy resolution, the flux and the spot size at the sample of the two beams are equal in XMCD experiments. However, it is difficult in beamline design because the distances from the two EPUs to the beamline optics are different and the beamline is not switchable. In this work, a beamline design without an entrance slit for fast polarization switching EPUs is discussed. The energy resolution of the two beams can be tuned to be equal by minor rotation of the optics in the monochromator. The flux of the two beams can be balanced through separation bladesX, Yin the exit slit, and by adjusting the position of theXblades along the beam. The spot size of the two beams can be adjusted to be equal by shifting the sample as well.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Levenspiel, Octave. "G/S reactor models—packed beds, bubbling fluidized beds, turbulent fluidized beds and circulating (fast) fluidized beds". Powder Technology 122, n.º 1 (enero de 2002): 1–9. http://dx.doi.org/10.1016/s0032-5910(01)00286-8.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

DEUTSCH, C. "Transport of megaelectron volt protons for fast ignition". Laser and Particle Beams 21, n.º 1 (enero de 2003): 33–35. http://dx.doi.org/10.1017/s0263034602211076.

Texto completo

Resumen

Quasi-linear analysis demonstrates that intense and nonrelativistic proton beams do not lose collectively their kinetic energy through transverse Weibel electromagnetic instabilities when interacting with supercompressed plasmas of inertial confinement interest.

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Tian, Xiaohe, Diana M. Leite, Edoardo Scarpa, Sophie Nyberg, Gavin Fullstone, Joe Forth, Diana Matias et al. "On the shuttling across the blood-brain barrier via tubule formation: Mechanism and cargo avidity bias". Science Advances 6, n.º 48 (noviembre de 2020): eabc4397. http://dx.doi.org/10.1126/sciadv.abc4397.

Texto completo

Resumen

The blood-brain barrier is made of polarized brain endothelial cells (BECs) phenotypically conditioned by the central nervous system (CNS). Although transport across BECs is of paramount importance for nutrient uptake as well as ridding the brain of waste products, the intracellular sorting mechanisms that regulate successful receptor-mediated transcytosis in BECs remain to be elucidated. Here, we used a synthetic multivalent system with tunable avidity to the low-density lipoprotein receptor–related protein 1 (LRP1) to investigate the mechanisms of transport across BECs. We used a combination of conventional and super-resolution microscopy, both in vivo and in vitro, accompanied with biophysical modeling of transport kinetics and membrane-bound interactions to elucidate the role of membrane-sculpting protein syndapin-2 on fast transport via tubule formation. We show that high-avidity cargo biases the LRP1 toward internalization associated with fast degradation, while mid-avidity augments the formation of syndapin-2 tubular carriers promoting a fast shuttling across.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Bernardi, Sara y Annachiara Colombi. "A particle model reproducing the effect of a conflicting flight information on the honeybee swarm guidance". Communications in Applied and Industrial Mathematics 9, n.º 1 (1 de diciembre de 2018): 159–73. http://dx.doi.org/10.2478/caim-2018-0021.

Texto completo

Resumen

Abstract The honeybee swarming process is steered by few scout individuals, which are the unique informed on the location of the target destination. Theoretical and experimental results suggest that bee coordinated flight arises from visual signals. However, how the information is passed within the population is still debated. Moreover, it has been observed that honeybees are highly sensitive to conflicting directional information. In fact, swarms exposed to fast-moving bees headed in the wrong direction show clear signs of disrupted guidance. In this respect, we here present a discrete mathematical model to investigate different hypotheses on the behaviour both of informed and uninformed bees. In this perspective, numerical realizations, specifically designed to mimic selected experiments, reveal that only one combination of the considered assumptions is able to reproduce the empirical outcomes, resulting thereby the most reliable mechanism underlying the swarm dynamics according to the proposed approach. Specifically, this study suggests that (i) leaders indicate the right flight direction by repeatedly streaking at high speed pointing towards the target and then slowly coming back to the trailing edge of the bee cloud; and (ii) uninformed bees, in turn, gather the route information by adapting their movement to all the bees sufficiently close to their position.

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Fontana, Cristiano Lino, Bonaldi Cédric, Wouter Geerts, Miguel Macías Martinez, Marzio Vidali y Stephan Oberstedt. "JRC MONNET – the intense fast-neutron source for fundamental and application-driven research". EPJ Web of Conferences 284 (2023): 06002. http://dx.doi.org/10.1051/epjconf/202328406002.

Texto completo

Resumen

MONNET is a fast-neutron source based on a 3.5 MV tandem accelerator, located at the Geel (BE) site of the Joint esearch Centre. It became operational in 2020. MONNET may deliver intense neutron beams in the energy range from 30 keV to 10.1 MeV and from 12.8 MeV to 24 MeV. Neutrons are generated by means of nuclear reactions in the target material (e.g. protons or deuterons on lithium-7, tritium or deuterium targets). MONNET delivers a neutron flux of up to 109 n/sr/s, depending on the producing reaction and the neutron energy. Neutron beams are essentially mono-energetic (∆En/En < 6% with En > 300 keV). The accelerator may also be used with proton and deuteron beams. Alpha beams will be offered soon. Photon beams are possible and presently under investigation. The research program ranges from cross section measurements, e.g. (n, f), (n, p), (n, α) as well as (p, p′), (p, n) and (p, γ), nuclear fission research, material studies (e.g. radiation-induced damage), to the investigation of advanced methods in nuclear technologies, safety and security. The MONNET neutron source offers beamtime to external user within the JRC EUFRAT Open Access program. Proposal evaluation by an independent panel is taking place up to two times per year.

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Treffert, Franziska, Chandra B. Curry, Todd Ditmire, Griffin D. Glenn, Hernan J. Quevedo, Markus Roth, Christopher Schoenwaelder, Marc Zimmer, Siegfried H. Glenzer y Maxence Gauthier. "Towards High-Repetition-Rate Fast Neutron Sources Using Novel Enabling Technologies". Instruments 5, n.º 4 (3 de diciembre de 2021): 38. http://dx.doi.org/10.3390/instruments5040038.

Texto completo

Resumen

High-flux, high-repetition-rate neutron sources are of interest in studying neutron-induced damage processes in materials relevant to fusion, ultimately guiding designs for future fusion reactors. Existing and upcoming petawatt laser systems show great potential to fulfill this need. Here, we present a platform for producing laser-driven neutron beams based on a high-repetition-rate cryogenic liquid jet target and an adaptable stacked lithium and beryllium converter. Selected ion and neutron diagnostics enable monitoring of the key parameters of both beams. A first single-shot proof-of-principle experiment successfully implemented the presented platform at the Texas Petawatt Laser facility, achieving efficient generation of a forward-directed neutron beam. This work lays the foundation for future high-repetition-rate experiments towards pulsed, high-flux, fast neutron sources for radiation-induced effect studies relevant for fusion science and applications that require neutron beams with short pulse duration.

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Trentadue, Germana, Rosanna Pinto, Marco Salvetti, Marco Zanni, Konstantinos Pliakostathis, Harald Scholz y Giorgio Martini. "Assessment of Low‐Frequency Magnetic Fields Emitted by DC Fast Charging Columns". Bioelectromagnetics 41, n.º 4 (11 de febrero de 2020): 308–17. http://dx.doi.org/10.1002/bem.22254.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Nassisi, Vincenzo, Domenico Delle Side y Vito Turco. "Very Fast Current Diagnostic for Linear Pulsed Beams". EPJ Web of Conferences 167 (2018): 02006. http://dx.doi.org/10.1051/epjconf/201816702006.

Texto completo

Resumen

Fast current pulses manage lasers and particle accelerators and require sophisticate systems to be detected. At today Rogowski coils are well known. They are designed and built with a toroidal structure. In recently application, flat transmission lines are imploded and for this reason we develop a linear Rogowski coil to detect current pulses inside flat conductors. To get deep information from the system, it was approached by means of the theory of the transmission lines. The coil we build presents a resistance but it doesn’t influence the rise time of the response, instead the integrating time. We also studied the influence of the magnetic properties of coil support. The new device was able to record pulses of more hundred nanoseconds depending on the inductance, load impedance and resistance of the coil. Furthermore, its response was characterized by a sub-nanosecond rise time (~100 ps), The attenuation coefficient depends mainly on the turn number of the coil, while the quality of the response depends both on the manufacture quality of the coil and on the magnetic core characteristics. In biophysical applications often, a double line is employed in order to have a sample as control and a sample stressed by a light source. So, in this case we build two equal plane lines by 100 Ω characteristic resistance connected in parallel. We diagnosed the current present in a line. The attenuation factor resulted to be 11,5 A/V.

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Blomgren, J. "Fast neutron beams--prospects for the coming decade". Radiation Protection Dosimetry 126, n.º 1-4 (13 de mayo de 2007): 64–68. http://dx.doi.org/10.1093/rpd/ncm014.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Brandstatter, B. "Fast reconstruction of beams in intense proton accelerators". IEEE Transactions on Magnetics 38, n.º 2 (marzo de 2002): 1113–16. http://dx.doi.org/10.1109/20.996285.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Loncol, Th, S. Vynckier y A. Wambersie. "Thermoluminescence in Proton and Fast Neutron Therapy Beams". Radiation Protection Dosimetry 66, n.º 1 (1 de julio de 1996): 299–304. http://dx.doi.org/10.1093/oxfordjournals.rpd.a031739.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Jansen, G. H. "Fast Monte Carlo simulation of charged particle beams". Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 5, n.º 1 (enero de 1987): 146. http://dx.doi.org/10.1116/1.583849.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Roth, M., T. E. Cowan, M. H. Key, S. P. Hatchett, C. Brown, W. Fountain, J. Johnson et al. "Fast Ignition by Intense Laser-Accelerated Proton Beams". Physical Review Letters 86, n.º 3 (15 de enero de 2001): 436–39. http://dx.doi.org/10.1103/physrevlett.86.436.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Ujvári, T., A. Tóth, I. Bertóti, P. M. Nagy y A. Juhász. "Surface treatment of polyethylene by fast atom beams". Solid State Ionics 141-142 (mayo de 2001): 225–29. http://dx.doi.org/10.1016/s0167-2738(01)00750-0.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Broerse, J. J. "The Physics and Radiobiology of Fast Neutron Beams". International Journal of Radiation Biology 59, n.º 4 (enero de 1991): 1069–70. http://dx.doi.org/10.1080/09553009114550941.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Zabala, N. y A. Rivacoba. "Dynamics of fast electron beams and bounded targets". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 354 (julio de 2015): 105–8. http://dx.doi.org/10.1016/j.nimb.2014.11.015.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Scalliet, P. "The physics and radiobiology of fast neutron beams". European Journal of Cancer and Clinical Oncology 27, n.º 10 (octubre de 1991): 1328. http://dx.doi.org/10.1016/0277-5379(91)90107-o.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!