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Ancient DNA-based sex determination of bison hide moccasins indicates Promontory cave occupants selected female hides for footwear

https://doi.org/10.1016/j.jas.2021.105533

Shirazi, Sabrina; Broomandkhoshbacht, Nasreen; Oppenheimer, Jonas; Metcalfe, Jessica Z.; Found, Rob; Ives, John W.; Shapiro, Beth (January 2022, Journal of Archaeological Science)

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Archaeological Recovery of Late Pleistocene Hair and Environmental DNA from Interior Alaska

https://doi.org/10.1080/14614103.2022.2031836

Wygal, Brian T.; Krasinski, Kathryn E.; Metcalfe, Jessica Z.; McMahan, David; Holmes, Charles E.; Crass, Barbara A.; Wriston, Teresa A.; Shirazi, Sabrina; Vershinina, Alisa; Shapiro, Beth (January 2022, Environmental Archaeology)

Ancient hair and remnant plant DNA are important environmental proxies that preserve for millennia in specific archaeological contexts. However, recovery has been rare from late Pleistocene sites and more may be found if deliberately sought. Once discovered, singular hair fragments are not easily identified to taxa through comparative analyses and environmental DNA (eDNA) extraction can be difficult depending on preservation or contamination. In this paper, we present our methods for the combined recovery of ancient hair specimens and eDNA from sediments to improve our understanding of late Pleistocene environments from the Holzman site along Shaw Creek in interior Alaska. The approach serves as a useful case study for learning more about local environmental changes.
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Operation and performance of the ATLAS semiconductor tracker in LHC Run 2

https://doi.org/10.1088/1748-0221/17/01/P01013

Aad, Georges; Abbott, Brad; Abbott, Dale Charles; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Syed Haider; Aboulhorma, Asmaa; Abramowicz, Halina; Abreu, Henso; et al (January 2022, Journal of Instrumentation)

Abstract The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. It consists of 4088 silicon strip sensor modules.During Run 2 (2015–2018) the Large Hadron Collider delivered an integrated luminosity of 156 fb -1 to the ATLAS experiment at a centre-of-mass proton-proton collision energy of 13 TeV. The instantaneous luminosity and pile-up conditions were far in excess of those assumed in the original design of the SCT detector.Due to improvements to the data acquisition system, the SCT operated stably throughout Run 2.It was available for 99.9% of the integrated luminosity and achieved a data-quality efficiency of 99.85%.Detailed studies have been made of the leakage current in SCT modules and the evolution of the full depletion voltage, which are used to study the impact of radiation damage to the modules.
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