Search results for "pole"
showing 10 items of 1981 documents
One-loop corrections to light cone wave functions: the dipole picture DIS cross section
2018
We develop methods needed to perform loop calculations in light cone perturbation theory using a helicity basis, refining the method introduced in our earlier work. In particular this includes implementing a consistent way to contract the four-dimensional tensor structures from the helicity vectors with d-dimensional tensors arising from loop integrals, in a way that can be fully automatized. We demonstrate this explicitly by calculating the one-loop correction to the virtual photon to quark-antiquark dipole light cone wave function. This allows us to calculate the deep inelastic scattering cross section in the dipole formalism to next-to-leading order accuracy. Our results, obtained using …
Partycypacja społeczna w kontekście budowy trasy średnicowej w Opolu
2019
Autor artykułu postawił sobie za cel opisanie przebiegu konfliktu przestrzennego oraz analizę procesu partycypacji społecznej w kontekście planowanej budowy trasy średnicowej przebiegającej przez wyspę Pasiekę w Opolu. Posługując się metodą studium przypadku podjęto próbę znalezienia odpowiedzi na pytania: czy władze samorządowe zastosowały „dobre praktyki” postulowane przez organizacje pozarządowe oraz jaką rolę odegrał w nich ruch miejski.
Charge radius changes of even-even neutron-rich Tellurium isotopes
2005
Laser spectroscopy based on resonant ionization of laser-desorbed atoms has been used to study the neutron-rich tellurium isotopes with the COMPLIS facility at ISOLDE-CERN. The isotope shift and the hyperfine structure of several neutron-rich Te isotopes: $^{120–136}$Te and $^{123m–133m}$Te have been measured. From the hyperfine structure and the isotope shift we can extract the magnetic and quadrupole moments and the change in the mean square charge radius respectively. The mean square charge radii of the even-even isotopes have been deduced and their comparison with the known data for the other elements near Z=50 is presented. The experimental $\delta$ is compared with that obtained from …
Three-dimensional skyrmions in spin-2 Bose–Einstein condensates
2017
We introduce topologically stable three-dimensional skyrmions in the cyclic and biaxial nematic phases of a spin-2 Bose-Einstein condensate. These skyrmions exhibit exceptionally high mapping degrees resulting from the versatile symmetries of the corresponding order parameters. We show how these structures can be created in existing experimental setups and study their temporal evolution and lifetime by numerically solving the three-dimensional Gross-Pitaevskii equations for realistic parameter values. Although the biaxial nematic and cyclic phases are observed to be unstable against transition towards the ferromagnetic phase, their lifetimes are long enough for the skyrmions to be imprinted…
Excitation Energy-Transfer in the LH2 Antenna of Photosynthetic Purple Bacteria via Excitonic B800 and B850 States
2000
A newly developed CIEM method that uses a combination of semi-empirical or ab-initio configuration interaction methods and exciton theory to predict electronic energies, eigenstates, absorption and CD spectra of aggregated chromophoric systems with environmental interactions included is extended and used for estimation of excitation energy transfer rates. Excitonic energy levels of the two ring systems the B800 and the B850 of the light harvesting antenna LH2 of Rhodopseudomonas acidophila and the corresponding absorption spectrum were calculated by assuming inter-ring interactions to be zero. Excitation energy transfer rates were calculated by using the Fermi Golden rule with the dipole - …
Korzystanie z korepetycji przez opolskich maturzystów – próba rozeznania skali zjawiska
2015
Zjawisko korepetycji ma charakter globalny. W Polsce istnieje od dawna i w ostatnich latach znacznie przybrało na sile. Obecnie prywatne lekcje są postrzegane jako coś normalnego. Przedstawione w pracy wyniki badań empirycznych przeprowadzonych wśród maturzystów z Opola pokazują powszechność korepetycji oraz wskazują, jakim motywami kierują się uczniowie korzystający z takich zajęć.
La tuilerie antique de Hombourg-Budange, Moselle
2016
The archaeological excavation undertaken in 2006 by the Institut national de recherches archéologiques preventives (Inrap) at the site “Le Clos des Tourelles” in Hombourg-Budange (Moselle, France) unearthed a Gallo-Roman tilery. It situated close to a medieval site, the initial target of the excavation project. The time span of the Gallo-Roman occupation cannot be stated with accuracy; only its abandonment can be dated to be later than 250 AD. The remains of the tilery are assembling a kiln, drains, a hall, a well, and, among other features, a small building. The plan and arrangement of the different features are représenting the whole working process of the tile production and, additionall…
Bilan sur les nécropoles du Bas-Empire en Franche-Comté.
2020
Sur les 94 sites funéraires antiques recensés en Franche-Comté, vingt et un seulement concernent le Bas-Empire. Malgré la faiblesse du corpus et des données anciennes, la comparaison entre ces quelques sites et ceux du Haut-Empire permet déjà de proposer quelques réflexions quant à l’évolution des rites funéraires. Les offrandes démontrent l’existence de deux rites funéraires assez répandus : le repas destiné au défunt et le dépôt de monnaie. De prime abord, en Franche-Comté, les offrandes funéraires des sépultures à incinération semblent nettement plus variées que celles découvertes dans les inhumations du Bas-Empire. Faut-il y voir une épuration du rituel funéraire ? Ce dernier semble dor…
Dainville (Pas-de-Calais), Le Champ Bel Air. Rapport de diagnostic
2010
Les occupations de la protohistoire ancienne et récente du Champ Bel Air
Shape Sensitivity Analysis and Gradient-Based Optimization of Large Structures Using MLFMA
2014
A fast method for computing the action of shape-differentiated electric field integral equation (EFIE) system matrix to a vector is derived exploiting the multilevel fast multipole algorithm (MLFMA). The proposed method is used in conjunction with the adjoint-variable method (AVM) to compute the shape gradient of arbitrary objective functions depending on shape of a metallic scatterer. The method is demonstrated numerically by optimizing the shape of a parabolic reflector illuminated with a half-wave dipole.