iotbx.cif is a new software module for the development of applications that make use of the CIF format. Comprehensive tools are provided for input, output and validation of CIFs, as well as for interconversion with high-level cctbx [Grosse-Kunstleve, Sauter, Moriarty & Adams (2002). J. Appl. Cryst.35, 126-136] crystallographic objects. The interface to the library is written in Python, whilst p...

I shortly review the worldline instanton method for calculating Schwinger pair production rates in (i) one-loop QED (ii) multiloop QED and (iii) one-loop open string theory. 1. History Already in 1931 F. Sauter [1] realized that Dirac’s theory of the electron predicts that an electric field of sufficient strength and extent can induce spontaneous creation of electron – positron pairs from the v...

Rolf Mitzner, Jens Rehanek, Jan Kern, Sheraz Gul, Johan Hattne, Taketo Taguchi, Roberto Alonso-Mori, Rosalie Tran, Christian Weniger, Henning Schröder, Wilson Quevedo, Hartawan Laksmono, Raymond G. Sierra, Guangye Han, Benedikt Lassalle-Kaiser, Sergey Koroidov, Katharina Kubicek, Simon Schreck, Kristjan Kunnus, Maria Brzhezinskaya, Alexander Firsov, Michael P. Minitti, Joshua J. Turner, Stefan ...

The study presented in this paper is part of the STRATUM project (Sauter et al., 1995, Teufel, 1993). The overall goal of STRATUM is to develop tools to support cooperative work in the strategic management of business enterprises. As new technology is developed to support cooperative work (so-called groupware) it is important to understand how that technology can best be applied to help users a...

(Abstract Continued) electron initial velocity to the velocity of light and 0 is the angle of observation, the Sommerfeld theory represents the experimental spectra quite well in shape as well as in angular distribution; however, the experimental intensities are consistently lower in absolute value than the corrected Sommerfeld theory by about 35 percent on the average. The Sauter-Bethe-Heitler...

The population balance model which was developed and verified in the FeatFlow environment has been implemented into OpenFOAM software package. Sulzer CompaxTM mixer is numerically studied with the developed computational tool. The numerical results have been compared with experimental ones and the results have been found to be in good agreement. An interesting experimental finding, decreasing S...

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

High-speed images of bubbly flow coupled with simultaneous passive acoustic measurements were carried out in a bubble column staged with structured fibrous catalysts. Local observations made with a high-speed camera system allow a detailed understanding of the influence of fabric structure on bubble formation processes and the determination of the Sauter bubble diameter. With acoustic measureme...

Experiments were conducted in a 76 mm diameter jacketed riser of a dual-loop high-density circulating fluidized bed facility with FCC particles of 65 lm Sauter mean diameter as bed material. The suspension temperature and the average and local suspension-to-wall heat transfer coefficients were measured. After superimposing the heat transfer results when the suspension near the wall is allowed t...

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...