Implementation of International Geographic Expansion

2020 ◽  
pp. 59-68
Author(s):  
Anders Pehrsson
Keyword(s):  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
James Blinkhorn ◽  
Huw S. Groucutt ◽  
Eleanor M. L. Scerri ◽  
Michael D. Petraglia ◽  
Simon Blockley

AbstractMarine Isotope Stage (MIS) 5, ~ 130 to 71 thousand years ago, was a key period for the geographic expansion of Homo sapiens, including engagement with new landscapes within Africa and dispersal into Asia. Occupation of the Levant by Homo sapiens in MIS 5 is well established, while recent research has documented complementary evidence in Arabia. Here, we undertake the first detailed comparison of Levallois core technology from eastern Africa, Arabia, and the Levant during MIS 5, including multiple sites associated with Homo sapiens fossils. We employ quantitative comparisons of individual artefacts that provides a detailed appraisal of Levallois reduction activity in MIS 5, thereby enabling assessment of intra- and inter-assemblage variability for the first time. Our results demonstrate a pattern of geographically structured variability embedded within a shared focus on centripetal Levallois reduction schemes and overlapping core morphologies. We reveal directional changes in core shaping and flake production from eastern Africa to Arabia and the Levant that are independent of differences in geographic or environmental parameters. These results are consistent with a common cultural inheritance between these regions, potentially stemming from a shared late Middle Pleistocene source in eastern Africa.


2016 ◽  
Vol 120 (2) ◽  
pp. 346-362 ◽  
Author(s):  
Martin R. Goetz ◽  
Luc Laeven ◽  
Ross Levine

2008 ◽  
Vol 92 (6) ◽  
pp. 1377-1390 ◽  
Author(s):  
Annelies Wilder-Smith ◽  
Duane J. Gubler

2001 ◽  
Vol 2001 (03) ◽  
pp. 1-42
Author(s):  
Allen N. Berger ◽  
◽  
Robert DeYoung

2018 ◽  
Vol 37 (4) ◽  
pp. 430-450
Author(s):  
Daniel Milton

Why do different Islamic State propaganda products receive different numbers of views? This article relies on a dataset of 1700 Islamic State photo essays to examine this question. It finds that violence in Islamic State photo essays, especially retributional violence, or violence directed at the group’s enemies and wayward adherents, leads to increased viewership. Releases that highlight the group’s military operations, governance activities and geographic expansion also draw more attention, although less than the increase for products containing retributional violence. These findings have implications for research and counterterrorism efforts targeted at reducing the propaganda appeal of terrorist organizations.


2014 ◽  
Author(s):  
Martin Goetz ◽  
Luc Laeven ◽  
Ross Levine

2020 ◽  
Vol 101 (3) ◽  
pp. 658-669
Author(s):  
Melissa J Reynolds-Hogland ◽  
Alan B Ramsey ◽  
August T Seward ◽  
Kristine L Pilgrim ◽  
Cory Engkjer ◽  
...  

Abstract We evaluated the response of a remnant population of yellow-bellied marmots (Marmota flaviventris) to targeted habitat enhancement in an ecological system that had been degraded during ~100 years of intensive livestock management, including marmot eradication. We used capture-recapture data and a novel use of a multistate framework to evaluate geographic expansion of the marmot population pre- and post-habitat enhancement. We also estimated age-structured survival, reproduction, and sex ratios. The marmot population appeared to respond positively to new habitat opportunities created by habitat enhancement: the number of marmots captured increased from three marmots pre-habitat enhancement to 54 (28 adults and yearlings, 26 young) post-habitat enhancement at the end of the study. Marmots expanded geographically by transitioning into habitat-enhanced areas, and adult females occupied and reproduced in all habitat-enhanced areas. The sex ratio of the young population in 2019 was strongly female-biased, which may have been influenced by poor body condition of breeding females owing to unusually prolonged snow cover that year. Adult and yearling survival were within the range of that reported for colonial adults and yearlings in Colorado. Our results suggest that active habitat enhancement can assist in the recovery of marmot populations in systems where marmots historically existed.


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