The π∆ production on the nucleon by real and virtual photons is discussed as initial step in a simple model approach for the two pion photoand electroproduction on the nucleon, with emphasis on nucleon resonance excitation which is of interest for new facilities like TJNAF. A calculation for π∆ channel in resonance excitation region is presented and compared to existing experimental data along ...

We report the results of a new calculation of soft-gluon corrections in B → Xsll decays. In particular, we present the first calculation of bremsstrahlung and corresponding virtual terms to the lepton forward–backward asymmetry, which allows us to systematically include all contributions to this observable beyond the lowest non-trivial order. The new terms are important, for instance the positi...

Introduction: An accurate and fast radiation dose calculation is essential for successful radiation radiotherapy. The aim of this study was to implement a new graphic processing unit (GPU) based radiation therapy treatment planning for accurate and fast dose calculation in radiotherapy centers. Materials and Methods: A program was written for parallel runnin...

The calculation of virtual neurons in a self-organizing map by interpolation allows to reduce calculation time and memory space in training and retrieval. In this paper, a new interpolation method, based on aane coordinates of a local system is presented and discussed. An example in the domain of colour mixture is used to show the properties and compare this method to others.

Electrostatic forces play a large role in determining the strength of protein-ligand interactions, and the calculation of pKa value shifts upon ligand binding is therefore an important component of any accurate protein-ligand binding calculation. However, such pKa calculations are rarely performed in virtual screening experiments due to the unavailability of ligand solution pKa values and the d...

We describe the calculation of the two–loop massive operator matrix elements for massive external fermions. These matrix elements are needed for the calculation of the O(α 2) initial state radiative corrections to e + e − annihilation into a neutral virtual gauge boson, based on the renor-malization group technique.

We review the program of the calculation of next-to-leading order corrections to the virtual photon impact factor. Following a brief introduction we present some technical aspects for the various contributions. Recently obtained results for transversely polarised virtual photons are discussed and an outline of how infrared divergences are cancelled is given. Implications of the subtraction of l...

This work describes a genetic algorithm for the calculation of substructural analysis for use in ligand-based virtual screening. The algorithm is simple in concept and effective in operation, with simulated virtual screening experiments using the MDDR and WOMBAT data sets showing it to be superior to substructural analysis weights based on a naive Bayesian classifier.

Designing and debugging distributed systems requires the detection of conditions across the entire system. As an illustration, monitoring the status of an application requires detection of termination, and using virtual time requires the periodic calculation of the global virtual time. The Generalized Conjunctive Predicate (GCP) detector ooers a method to derive detection algorithms for these a...