Search Results - "Kirk, J G"

Quantum radiation reaction in laser-electron-beam collisions by Blackburn, T G, Ridgers, C P, Kirk, J G, Bell, A R

“…It is possible using current high-intensity laser facilities to reach the quantum radiation reaction regime for energetic electrons. An experiment using a…”
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The transport of cosmic rays in self-excited magnetic turbulence by Reville, B., O'Sullivan, S., Duffy, P., Kirk, J. G.

“…The process of diffusive shock acceleration relies on the efficacy with which hydromagnetic waves can scatter charged particles in the precursor of a shock…”
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Particle acceleration by ultrarelativistic shocks: theory and simulations by Achterberg, Abraham, Gallant, Yves A., Kirk, John G., Guthmann, Axel W.

“…We consider the acceleration of charged particles near ultrarelativistic shocks, with Lorentz factor . We present simulations of the acceleration process and…”
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The Polarization of High-Energy Pulsar Radiation in the Striped Wind Model by Pétri, J, Kirk, J. G

“…The Stokes parameters of the pulsed synchrotron radiation produced in the striped pulsar wind model are computed and compared with optical observations of the…”
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potential for nitrification and nitrate uptake in the rhizosphere of wetland plants: A modelling study by Kirk, G. J. D, Kronzucker, H. J

“…BACKGROUND AND AIMS: It has recently found that lowland rice grown hydroponically is exceptionally efficient in absorbing NO3(-), raising the possibility that…”
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dual porosity model of nutrient uptake by root hairs by Zygalakis, K. C., Kirk, G. J. D., Jones, D. L., Wissuwa, M., Roose, T.

“…• The importance of root hairs in the uptake of sparingly soluble nutrients is understood qualitatively, but not quantitatively, and this limits efforts to…”
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Linear Acceleration Emission in Pulsar Magnetospheres by Reville, B, Kirk, J. G

“…Linear acceleration emission occurs when a charged particle is accelerated parallel to its velocity. We evaluate the spectral and angular distribution of this…”
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Technologies for increasing carbon storage in soil to mitigate climate change by Whitmore, A. P, Kirk, G. J. D, Rawlins, B. G

“…Means to enhance storage of carbon in soil or avoid its loss from soil are discussed and examined from the viewpoint of policy. In particular, technologies…”
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Reconnection in a Striped Pulsar Wind by Lyubarsky, Y, Kirk, J. G

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Steady-State Solutions in Nonlinear Diffusive Shock Acceleration by Reville, B, Kirk, J. G, Duffy, P

“…Stationary solutions to the equations of nonlinear diffusive shock acceleration play a fundamental role in the theory of cosmic-ray acceleration. Their…”
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Dissipation in Poynting-Flux-dominated Flows: The σ-Problem of the Crab Pulsar Wind by Kirk, J. G, Skjæraasen, O

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Long-term increases in soil carbon due to ecosystem fertilization by atmospheric nitrogen deposition demonstrated by regional-scale modelling and observations by Tipping, E., Davies, J. A. C., Henrys, P. A., Kirk, G. J. D., Lilly, A., Dragosits, U., Carnell, E. J., Dore, A. J., Sutton, M. A., Tomlinson, S. J.

“…Fertilization of nitrogen (N)-limited ecosystems by anthropogenic atmospheric nitrogen deposition (N dep ) may promote CO 2 removal from the atmosphere,…”
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Particle Acceleration at Ultrarelativistic Shocks: An Eigenfunction Method by Kirk, J. G, Guthmann, A. W, Gallant, Y. A, Achterberg, A

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Isotopic discrimination of zinc in higher plants by Weiss, D. J., Mason, T. F. D., Zhao, F. J., Kirk, G. J. D., Coles, B. J., Horstwood, M. S. A.

“…• The extent of isotopic discrimination of transition metals in biological processes is poorly understood but potentially has important applications in plant…”
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Particle acceleration in relativistic current sheets by Kirk, J G

“…Relativistic current sheets have been proposed as the sites of dissipation in pulsar winds, jets in active galaxies, and other Poynting flux dominated flows…”
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Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil by Izquierdo, M, Impa, S. M, Johnson‐Beebout, S. E, Weiss, D. J, Kirk, G. J. D

“…The changes in soil chemistry following submergence of a soil for rice production result in zinc (Zn) being immobilized in very insoluble forms. Consequently,…”
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solution of convection-diffusion equations for solute transport to plant roots by Roose, T, Kirk, G. J. D

“…To help develop models of solute uptake that are computationally efficient and suitable for up-scaling to whole root systems, we provide three alternative…”
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assessment of subsoil organic carbon stocks in England and Wales by Gregory, A. S, Kirk, G. J. D, Keay, C. A, Rawlins, B. G, Wallace, P, Whitmore, A. P

“…It is estimated that half the soil carbon globally is in the subsoil, but data are scarce. We updated estimates of subsoil organic carbon (OC) in England and…”
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The Beaming Pattern and Spectrum of Radiation from Inverse Compton Scattering in Blazars by Georganopoulos, M, Kirk, J. G, Mastichiadis, A

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The stability of strong waves and its implications for pulsar wind shocks by Mochol, I., Kirk, J. G.

“…Strong waves can mediate a shock transition between a pulsar wind and its surroundings, playing the role of an extended precursor, in which the energy is…”
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