877 research outputs found
Calibration of electrons and photons with the ATLAS detector, and its impact on ATLAS precision measurements
No full textOn behalf of the ATLAS CollaborationInternational audienceSince the discovery of the Higgs boson a lot of effort has been devoted to the measurement of its properties. One of its key parameter is its mass, which has been measured by the ATLAS detector at the LHC. For this measurement a precision calibration of the ATLAS electromagnetic calorimeter is required. The details of this calibration as well as the current understanding of the detector will be described. The measurement of mH and the impact of the calibration will be described
Reproducibility experiments on measuring acoustical properties of rigid-frame porous media (round-robin tests)
No full textA round robin test of the acoustical properties of porous media
No full textThere is a considerable number of research publications on the characterization of porous media that is carried out in accordance with the ISO 10534-2. However, the reproducibility of these characterization procedures is not well understood. This paper deals with the reproducibility of some standard characterization procedures for acoustic porous materials. One novelty of this paper is that independent laboratory measurements were performed on the same material specimens so that the naturally occurring inhomogeneity in materials was controlled. Another novelty of this work is that it presents the reproducibility data for the characteristic impedance, complex wavenumber and for some related pore structure properties. This work can be helpful to understand better the tolerances of these material characterization procedures so the improvements can be developed to reduce the experimental errors and improve the reproducibility between laboratories.There is a considerable number of research publications on the characterization of porous media that is carried out in accordance with the ISO 10534-2. However, the reproducibility of these characterization procedures is not well understood. This paper deals with the reproducibility of some standard characterization procedures for acoustic porous materials. One novelty of this paper is that independent laboratory measurements were performed on the same material specimens so that the naturally occurring inhomogeneity in materials was controlled. Another novelty of this work is that it presents the reproducibility data for the characteristic impedance, complex wavenumber and for some related pore structure properties. This work can be helpful to understand better the tolerances of these material characterization procedures so the improvements can be developed to reduce the experimental errors and improve the reproducibility between laboratories
Reproducibility experiments on measuring acoustical properties of rigid-frame porous media (round-robin tests)
No full textThis paper reports the results of reproducibility experiments on the interlaboratory characterization of the acoustical properties of three types of consolidated porous media: granulated porous rubber, reticulated foam, and fiberglass. The measurements are conducted in several independent laboratories in Europe and North America. The studied acoustical characteristics are the surface complex acoustic impedance at normal incidence and plane wave absorption coefficient which are determined using the standard impedance tube method. The paper provides detailed procedures related to sample preparation and installation and it discusses the dispersion in the acoustical material property observed between individual material samples and laboratories. The importance of the boundary conditions, homogeneity of the porous material structure, and stability of the adopted signal processing method are highlighted
Author Correction: A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
No full textIn the version of this article initially published, the ATLAS Collaboration
author names, affiliations and acknowledgements were omitted and
have now been included in the HTML and PDF versions of the article
Automation, Climate Change, and the Future of Farm Work: Cross-Disciplinary Lessons for Studying Dynamic Changes in Agricultural Health and Safety
No full textIn this review, we first assess the state of agricultural health and safety research as it pertains to the dynamic challenges facing automating agriculture on a warming planet. Then, we turn to social science fields such as rural sociology, science and technology studies, and environmental studies to leverage relevant insights on the introduction of new technologies, environmental risks, and associated workplace hazards. Increased rates of automation in agriculture alongside new risks associated with climate change create the need for anticipatory governance and adaptive research to study novel mechanisms of worker health and safety. The use of the PRISMA framework led to the 137 articles for our review. We identify three themes in the literature on agricultural health and safety: (1) adoption outcomes, (2) discrete cases of health risks, and (3) an emphasis on care and wellbeing in literature on dairy automation Our review led to the identification of research gaps, noting that current research (a) tends to examine these forces separately, instead of together, (b) has not made robust examination of these forces as socially embedded, and (c) has hesitated to examine the broad, transferable themes for how these forces work across industries. In response to these gaps, we suggest that attention to outside disciplines may provide agricultural health and safety research with a toolset to examine needed inquiry into the multiplicity of experiences of rural stakeholders, the industry specific problems arising from automation and climate change, and the socially embedded aspects of agricultural work in the future
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