Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum

Axionlike particles (ALPs) are hypothetical light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays and turbulent magnetic fields, the existence of ALPs can modify the energy spectrum of the gamma rays for a sufficiently large coupling between ALPs and photons. This modification would take the form of an irregular behavior of the energy spectrum in a limited energy range. Data from the H.E.S.S. observations of the distant BL Lac object PKS 2155-304 (z=0.116) are used to derive upper limits at the 95% C.L. on the strength of the ALP coupling to photons, ggammaa<2.1×10-11GeV-1 for an ALP mass between 15 and 60 neV. The results depend on assumptions on the magnetic field around the source, which are chosen conservatively. The derived constraints apply to both light pseudoscalar and scalar bosons that couple to the electromagnetic fieldFil: Medina, Maria Clementina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); ArgentinaFil: H.E.S. S. collaboration

Spatial patterns of lower respiratory tract infections and their association with fine particulate matter

[[abstract]]This study aimed to identify the spatial patterns of lower respiratory tract infections (LRIs) and their association with fine particulate matter (PM2.5). The disability-adjusted life year (DALY) database was used to represent the burden each country experiences as a result of LRIs. PM2.5 data obtained from the Atmosphere Composition Analysis Group was assessed as the source for main exposure. Global Moran's I and Getis-Ord Gi* were applied to identify the spatial patterns and for hotspots analysis of LRIs. A generalized linear mixed model was coupled with a sensitivity test after controlling for covariates to estimate the association between LRIs and PM2.5. Subgroup analyses were performed to determine whether LRIs and PM2.5 are correlated for various ages and geographic regions. A significant spatial auto-correlated pattern was identified for global LRIs with Moran's Index 0.79, and the hotspots of LRIs were clustered in 35 African and 4 Eastern Mediterranean countries. A consistent significant positive association between LRIs and PM2.5 with a coefficient of 0.21 (95% CI 0.06-0.36) was identified. Furthermore, subgroup analysis revealed a significant effect of PM2.5 on LRI for children (0-14 years) and the elderly (≥ 70 years), and this effect was confirmed to be significant in all regions except for those comprised of Eastern Mediterranean countries

Elektronik- und Programmentwicklung fuer den Einsatz von Laserscannern als optische Sensoren bei der Pruefung von Oberflaechen und Geweben Schlussbericht. Abschlussdatum: August 1980

TIB: RN 2598 (84-111)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Faunistische Grundwasserbewertung. Neue Verfahren und M&ouml;glichkeiten.

Der Zustand von Oberfl&auml;chengew&auml;ssern wird seit Jahrzehnten biologisch &uuml;berwacht. Was sich an der Oberfl&auml;che bew&auml;hrt hat, funktioniert auch im Untergrund. Grundwasser ist eine unserer wichtigsten Bezugsquellen f&uuml;r Trinkwasser. Durch Ver&auml;nderungen der Landnutzung und Stoffeintr&auml;ge ist die Qualit&auml;t des Grundwassers jedoch zunehmend gef&auml;hrdet und eine Vulnerabilit&auml;tsabsch&auml;tzung somit umso wichtiger. Die EU-Wasserrahmenrichtlinie (WRRL: 2000/60/EG) fordert auch f&uuml;r Grundwasser eine schrittweise Verringerung der bisherigen Grundwasserverschmutzung und das Verhindern von weiteren Verunreinigungen [1]. Mit der Bewertung des &ouml;kologischen Zustands von Grundwasser&ouml;kosystemen befasst sich das Verbundprojekt &bdquo;Ground- Care&ldquo;, das vom Bundesministerium f&uuml;r Bildung und Forschung (BMBF) innerhalb des F&ouml;rderschwerpunkts Nachhaltiges Wassermanagement (NaWaM) gef&ouml;rdert wird. In diesem Beitrag sollen die vielseitigen Anwendungsm&ouml;glichkeiten von Grundwassertieren f&uuml;r die Bewertung und &Uuml;berwachung des Grundwassers anhand konkreter Beispiele vorgestellt werden