Results 51 to 60 of about 10,272 (178)

Preliminary Calculation of $\alpha_s$ from Green Functions with Dynamical Quarks

, 2001
We present preliminary results on the computation of the QCD running coupling constant in the $\widetilde{MOM}$ scheme and Landau gauge with two flavours of dynamical Wilson quarks.
A.X. El-Khadra, ALPHA collaboration, C.T.H. Davies ., Claude Roiesnel, CP-PACS collaboration, D. Becirevic, D. Becirevic, D. Beciveric, G.S. Bali, Hervé Moutarde, Jacques Micheli, Jean Pierre Leroy, Jose Rodríguez-Quintero, K.G. Chetyrkin, M. Lüscher, M. Lüscher, Olivier Pène, P. Boucaud, P. Boucaud, P. Boucaud ., Particle Data Group collaboration, Philippe Boucaud, SESAM collaboration, T. Lippert ., V. Gimenez   +24 more
core   +1 more source

An Observational Determination of the Bolometric Quasar Luminosity Function [PDF]

, 2006
We combine a large set of quasar luminosity function (QLF) measurements from the rest-frame optical, soft and hard X-ray, and near- and mid-infrared bands to determine the bolometric QLF in the redshift interval z=0-6.
Boyle B. J., Comastri A., Fioc M., Gilli R., Gordon T. Richards, Hasinger G., Kormendy J., Lars Hernquist, Lawrence A., Magdziarz P., Miyaji T., Nandra K., Page M. J., Philip F. Hopkins, Silk J., Soltan A.   +15 more
core   +2 more sources

An Integrated Modelling Framework to Determine Terrestrial Carbon Dioxide Removal via Enhanced Rock Weathering

Global Change Biology, Volume 31, Issue 12, December 2025.
T&C‐SMEW is an integrated modelling framework that couples ecohydrological, biogeochemical, and weathering processes to quantify carbon dioxide removal (CDR) via enhanced rock weathering (ERW). The model captures high‐frequency plant–soil–water interactions that govern cation release, alkalinity generation, soil pH dynamics, and ecosystem carbon fluxes.
Ziyan Zhang, Gregory Jones, Salvatore Calabrese, Matteo Bertagni, Simone Fatichi, Bonnie Waring, Athanasios Paschalis   +6 more
wiley   +1 more source

Modeling saffron corm production under climate change using Hydrus‐1D enhanced with a novel crop yield module

Vadose Zone Journal, Volume 24, Issue 6, November/December 2025.
Abstract Saffron (Crocus sativus L.) is an ideal crop for arid and semiarid regions due to its low water requirement and high economic value. This study involves calibration and validation of the Hydrus‐1D model in order to explore the influence of climate change on saffron corm production.
Amir Akbari, Ali Naghi Ziaei, Seyed Mohammadreza Naghedifar, Jan W. Hopmans, Jamile Gholipour   +4 more
wiley   +1 more source

Vector Beams with Only Transverse Intensity at Focus

Applied Sciences, 2023
In this work, the tight focusing of vector beams with azimuthal polarization and beams with a V-line of polarization singularity (sector azimuthal polarization) was simulated numerically using the Richards–Wolf formulas.
S. Stafeev, N. N. Kazakov, V. Zaitsev, Sergey D. Poletayev, V. Kotlyar   +4 more
semanticscholar   +1 more source

A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: I. Galaxy Mergers & Quasar Activity

, 2007
(Abridged) We develop a model for the cosmological role of mergers in the evolution of starbursts, quasars, and spheroidal galaxies. Combining halo mass functions (MFs) with empirical halo occupation models, we calculate where major galaxy-galaxy mergers
Athanassoula E., Bower R. G., Combes F., da Angela J., Dušan Kereš, Gao L., Kormendy J., Krivitsky D. S., Lars Hernquist, Li C., Lynden-Bell D., Mo H. J., Pfenniger D., Philip F. Hopkins, Richstone D., Salviander S., Saunders W., Shakura N. I., Soltan A., Thomas J. Cox, Weinmann S. M., White S. D. M.   +21 more
core   +1 more source

A Quantitative Analysis of 21st Century Skills: A Case of Semantic and Psychometric Overlap

International Journal of Selection and Assessment, Volume 33, Issue 4, November 2025.
ABSTRACT While the concept of 21st century skills has become omnipresent, there is little consistency regarding the terms, definitions, or measurement instruments used, causing a problem for personnel selection policies as well as education and training.
Gabrielle Teyssier‐Roberge, Joel Gagnon, Sébastien Tremblay, Helen Hodgetts   +3 more
wiley   +1 more source

Calculation of the intensity at the sharp focus of a cylindrical vector beam by three methods

Computer optics, 2023
We conduct a comparative analysis of diffraction fields upon sharply focusing vortex and non-vortex incident beams, calculated using three non-paraxial methods. The methods employed are a finite difference time domain (FDTD) method, a Rayleigh–Sommerfeld
A. Nalimov, V. Kotlyar, Y. Khanenko
semanticscholar   +1 more source

Polarization Möbius strip at the tight focus of a generalized Poincaré beam

Компьютерная оптика
Based on the Richards-Wolf formalism, we investigate tight focusing of a generalized Poincaré beam. Analytical expressions are derived for all components of the electric field strength vector in the focal plane.
V.V. Kotlyar, A.A. Kovalev, A.M. Telegin
doaj   +1 more source

Exact solution of an exclusion process with three classes of particles and vacancies

, 1999
We present an exact solution for an asymmetric exclusion process on a ring with three classes of particles and vacancies. Using a matrix product Ansatz, we find explicit expressions for the weights of the configurations in the stationary state.
, Alcaraz F C, Arndt P F, Derrida B, Derrida B, Derrida B, Derrida B, Derrida B, Derrida B, Dhar D, Essler F H, Evans M R, Fouladvand M E, Hakim V, Hinrichsen H, Hinrichsen H, Honecker A, K Mallick, Krug J, Liggett T M, Mukamel D, N Rajewsky, Nagel K, Rajewsky N, Rajewsky N, S Mallick, Schmittmann B, Spohn H, Stinchcombe R B   +28 more
core   +1 more source