Moving two rivers from the middle of the Terminal 5 project site at London's Heathrow airport to a new alignment around the western airport perimeter was a critical and highly environmentally sensitive sub-project of the T5 programme. The rivers diversion had to be completed before the original river structures could be demolished to enable continuation of the main terminal development. As described in this paper, the £45 million diversion project included the creation of two 3 km long river channels, phased realignment of 3 km of highway and landscape works to the western boundary of Heathrow.
Brookgreen Gardens, Georgetown County, South Carolina, includes the remains of Brookgreen Plantation and other historic rice plantations. The property contains archeological resources associated with enslaved African, African-American, and Native American people. Visitors are told that the piers and chimneys of the homes of the enslaved were made of local brick, from clay dug, processed, and fired on-site. The clay mining allegedly formed the ponds and water features still visible today. To test that assertion, the authors conducted experiments, including collecting and geochemically analyzing local clays from these water features, to better understand the brick-making practices of Brookgreen's enslaved workers. Using X-ray fluorescence spectrometry, we determined that these ponds were not the source of clay used for bricks. Instead, a deposit of clay located closer to the historic rice fields, where much of the work on the plantation occurred, was geochemically consistent with the archeological bricks.
Flood mitigation measures delivered at the London 2012 Olympic Park have reduced flood risk to more than 4000 residential and commercial properties, improving the quality of life for thousands of east London residents. Additional benefits include water quality, habitat creation, biodiversity, recreation, leisure and education. This was achieved by adopting a collaborative approach across a team that included contractors, planners and key stakeholders. The result is a true and lasting legacy for London and a model for sustainable flood risk management.
ATHENA has been designed as a general purpose detector capable of delivering the full scientific scope of the Electron-Ion Collider. Careful technology choices provide fine tracking and momentum resolution, high performance electromagnetic and hadronic calorimetry, hadron identification over a wide kinematic range, and near-complete hermeticity.
This article describes the detector design and its expected performance in the most relevant physics channels. It includes an evaluation of detector technology choices, the technical challenges to realizing the detector and the R&D required to meet those challenges.
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