Signal recognition efficiencies of artificial neural-network pulse-shape discrimination in HPGe 0νββ0\nu\beta\beta-decay searches

A pulse-shape discrimination method based on artificial neural networks was applied to pulses simulated for different background, signal and signal-like interactions inside a germanium detector. The simulated pulses were used to investigate variations of efficiencies as a function of used training set. It is verified that neural networks are well-suited to identify background pulses in true-coaxial high-purity germanium detectors. The systematic uncertainty on the signal recognition efficiency derived using signal-like evaluation samples from calibration measurements is estimated to be 5\%. This uncertainty is due to differences between signal and calibration samples

Radio Emission in Atmospheric Air Showers : Results of LOPES-10

LOPES is set up at the location of the KASCADE-Grande extensive air shower experiment in Karlsruhe, Germany and aims to measure and investigate radio pulses from Extensive Air Showers. Data taken during half a year of operation of 10 LOPES antennas (LOPES-10), triggered by showers observed with KASCADE-Grande have been analyzed. We report about results of correlations found of the measured radio signals by LOPES-10 with shower parameters

First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers

We report the first direct measurement of the overall characteristics of microwave radio emission from extensive air showers. Using a trigger provided by the KASCADE-Grande air shower array, the signals of the microwave antennas of the CROME (Cosmic-Ray Observation via Microwave Emission) experiment have been read out and searched for signatures of radio emission by high-energy air showers in the GHz frequency range. Microwave signals have been detected for more than 30 showers with energies above 3*10^16 eV. The observations presented in this Letter are consistent with a mainly forward-directed and polarised emission process in the GHz frequency range. The measurements show that microwave radiation offers a new means of studying air showers at energies above 10^17 eV.Comment: Accepted for publication in PR

Estimación dinámica de parámetros para un modelo ecológico del Embalse Los Molinos

Fil: Rodriguez Reartes, S. B. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Estrada, V. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Bazán, R. Instituto Sup de Estudios Ambientales; Argentina.Fil: Bazán, R. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Larrosa, N. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: López, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: López, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: Busso, F. Aguas Cordobesas S.A.; Argentina.Fil: Díaz, M. S. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.En este trabajo, presentamos y calibramos un modelo de calidad de agua basado en primeros principios, el cual representa los procesos ecológicos a través de un complejo set de ecuaciones algebraicodiferenciales. El modelo requiere la estimación de numerosos parámetros para ajustar a las condiciones ambientales específicas del sitio en estudio. Se consideran los gradientes de las variables de estado a lo largo de la columna de agua, resultando en un sistema de ecuaciones algebraicas y diferenciales a derivadas parciales. Luego, el sistema es transformado a un sistema ordinario diferencial-algebraico (EDA) por discretización espacial del cuerpo de agua en capas horizontales. Los principales parámetros biogeoquímicos del modelo son obtenidos por resolución de un problema de estimación dinámica de parámetros, sujeto al EDA formulado. Los parámetros calculados permiten una representación apropiada de la dinámica del cuerpo de agua, como se muestra en los resultados numéricos.Fil: Rodriguez Reartes, S. B. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Estrada, V. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Bazán, R. Instituto Sup de Estudios Ambientales; Argentina.Fil: Bazán, R. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Larrosa, N. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: López, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: López, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: Busso, F. Aguas Cordobesas S.A.; Argentina.Fil: Díaz, M. S. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Otras Ingeniería Químic

KASCADE-Grande Limits on the Isotropic Diffuse Gamma-Ray Flux between 100 TeV and 1 EeV

KASCADE and KASCADE-Grande were multi-detector installations to measure individual air showers of cosmic rays at ultra-high energy. Based on data sets measured by KASCADE and KASCADE-Grande, 90% C.L. upper limits to the flux of gamma-rays in the primary cosmic ray flux are determined in an energy range of ${10}^{14} - {10}^{18}$ eV. The analysis is performed by selecting air showers with a low muon content as expected for gamma-ray-induced showers compared to air showers induced by energetic nuclei. The best upper limit of the fraction of gamma-rays to the total cosmic ray flux is obtained at $3.7 \times {10}^{15}$ eV with $1.1 \times {10}^{-5}$. Translated to an absolute gamma-ray flux this sets constraints on some fundamental astrophysical models, such as the distance of sources for at least one of the IceCube neutrino excess models.Comment: Published in The Astrophysical Journal, Volume 848, Number 1. Posted on: October 5, 201

KCDC - The KASCADE Cosmic-ray Data Centre

KCDC, the KASCADE Cosmic-ray Data Centre, is a web portal, where data of astroparticle physics experiments will be made available for the interested public. The KASCADE experiment, financed by public money, was a large-area detector for the measurement of high-energy cosmic rays via the detection of air showers. KASCADE and its extension KASCADE-Grande stopped finally the active data acquisition of all its components including the radio EAS experiment LOPES end of 2012 after more than 20 years of data taking. In a first release, with KCDC we provide to the public the measured and reconstructed parameters of more than 160 million air showers. In addition, KCDC provides the conceptional design, how the data can be treated and processed so that they are also usable outside the community of experts in the research field. Detailed educational examples make a use also possible for high-school students and early stage researchers.Comment: 8 pages, accepted proceeding of the ECRS-symposium, Kiel, 201

2008-2009 President\u27s Report

The Linfield College President\u27s Annual Report is a collection of information about the year in review, including academics, student life and athletics, enrollment, finances, philanthropy, and leadership