Abstract. This work describes the latest design, calibration and application of a near-infrared laser diode-based photoacoustic (PA) hygrometer developed for total water content measurement in simulated atmospheric freezing precipitation high ice conditions with relevance fundamental icing research, aviation testing, certification. The single-wavelength single-pass PA absorption cell is calibra...

The generalized Schrr odinger equation d 2 =dx 2 + F (k) = ikP (x) + Q(x)] is considered, where P and Q are integrable potentials with nite rst moments and F satisses certain conditions. The behavior of the scattering coeecients near zeros of F is analyzed. It is shown that in the so-called exceptional case, the values of the scattering coeecients at a zero of F may be aaected by P (x): The loc...

Background: Contrast-induced nephropathy (CIN) is a common complication in patients undergoing percutaneous coronary intervention (PCI). The Elderly one of the risk factors for CIN and increase mortality. N-acetylcysteine recommended as preventive therapy post PCI due to its antioxidant activity. However, previous studies have shown that effectiveness n-acetylcysteine still inconsistent. Object...

V. Bernard,1,* E. Epelbaum,2,† H. Krebs,2,‡ and Ulf-G. Meißner3,4,§ 1Institut de Physique Nucléaire, CNRS/Univ. Paris-Sud 11, (UMR 8608), F-91406 Orsay Cedex, France 2Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany 3Universität Bonn, Helmholtz-Institut für Strahlenund Kernphysik (Theorie) and Bethe Center for Theoretical Physics, D-53115 Bonn, Germany 4Fors...

We investigate the imaginary parts of the nucleon electromagnetic and axial form factors close to threshold in the framework of heavy baryon chiral perturbation theory. For the isovector electromagnetic form factors, we recover the well known strong enhancement near threshold. For the isoscalar ones, we show that there is no visible enhancement due to the three–pion continuum. This justifies th...

The preservation of the polarization level during acceleration of the electron beam is currently the main topic at the Electron Stretcher Accelerator (ELSA) of the University of Bonn. It can be improved by a good correction of the closed-orbit relative to the magnetic quadruple centres using the method of beam-based alignment. Beam position monitor electronics, developed in the Forschungszentru...