scholarly journals MODELING RELATIONSHIPS BETWEEN SPACE, MOVEMENT, AND LITHIC GEOMETRIC ATTRIBUTES

2018 ◽  
Vol 83 (3) ◽  
pp. 444-461 ◽  
Author(s):  
Benjamin Davies ◽  
Simon J. Holdaway ◽  
Patricia C. Fanning

Evidence for changes in human mobility is fundamental to interpretations of transitions in human socioeconomic organization. Showing changes in mobility requires both archaeological proxies that are sensitive to movement and a clear understanding of how different mobility configurations influence their patterning. This study uses computer simulation to explore how different combinations of reduction, selection, transport, and discard of stone artifacts generate patterning in the “cortex ratio,” a geometric proxy used to demonstrate movement at the assemblage level. A case study from western New South Wales, Australia, shows how cortex ratios are used to make inferences about movement. Results of the exploratory simulation show that redundancy in movement between discards reduces variability in cortex ratios, while mean assemblage values can be attributed to the relative proportions of artifacts carried into and out of the assemblages. These results suggest that raw material availability is a potentially crucial factor in determining what kinds of mobility are visible in assemblages, whereby different access to raw material can shift the balance of import and export of stone in an otherwise undirected movement configuration. These findings are used to contextualize distributions of cortex ratios from the raw material–rich study area, prompting suggestions for further fieldwork.

2019 ◽  
Author(s):  
Benjamin Davies ◽  
Simon Holdaway ◽  
Patricia C. Fanning

Evidence for changes in human mobility is fundamental to interpretations of transitions in human socioeconomic organization. Showing changes in mobility requires both archaeological proxies that are sensitive to movement and a clear understanding of how different mobility configurations influence their patterning. This study uses computer simulation to explore how different combinations of reduction, selection, transport, and discard of stone artifacts generate patterning in the “cortex ratio,” a geometric proxy used to demonstrate movement at the assemblage level. A case study from western New South Wales, Australia, shows how cortex ratios are used to make inferences about movement. Results of the exploratory simulation show that redundancy in movement between discards reduces variability in cortex ratios, while mean assemblage values can be attributed to the relative proportions of artifacts carried into and out of the assemblages. These results suggest that raw material availability is a potentially crucial factor in determining what kinds of mobility are visible in assemblages, whereby different access to raw material can shift the balance of import and export of stone in an otherwise undirected movement configuration. These findings are used to contextualize distributions of cortex ratios from the raw material–rich study area, prompting suggestions for further fieldwork.


Environments ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 2
Author(s):  
Peter Brimblecombe ◽  
Yonghang Lai

The COVID-19 pandemic made it critical to limit the spread of the disease by enforcing human isolation, restricting travel and reducing social activities. Dramatic improvements to air quality, especially NO2, have often characterised places under COVID-19 restrictions. Air pollution measurements in Sydney in April 2019 and during the lockdown period in April 2020 show reduced daily averaged NO2 concentrations: 8.52 ± 1.92 and 7.85 ± 2.92 ppb, though not significantly so (p1~0.15) and PM2.5 8.91 ± 4.94 and 7.95 ± 2.64 µg m−3, again a non-significant difference (p1~0.18). Satellite imagery suggests changes that parallel those at ground level, but the column densities averaged over space and time, in false-colour, are more dramatic. Changed human mobility could be traced in increasing times spent at home, assessed from Google Mobility Reports and mirrored in decreased traffic flow on a major road, suggesting compliance with the restrictions. Electricity demand for the State of New South Wales was low under lockdown in early April 2020, but it recovered rapidly. Analysis of the uses of search terms: bushfires, air quality, haze and air pollution using Google Trends showed strong links between bushfires and pollution-related terms. The smoke from bushfires in late 2019 may well have added to the general impression of improved air quality during lockdown, despite only modest changes in the ground level measurements. This gives hints that successful regulation of air quality requires maintaining a delicate balance between our social perceptions and the physical reality.


2021 ◽  
Vol 8 ◽  
pp. 237437352199862
Author(s):  
Tara Dimopoulos-Bick ◽  
Louisa Walsh ◽  
Kim Sutherland

The COVID-19 pandemic continues to affect health care systems globally, and there is widespread concern about the indirect impacts of COVID-19. Indirect impacts are caused by missed or delayed health care—not as a direct consequence of COVID-19 infections. This study gathered experiences of, and perspectives on, the indirect impacts of COVID-19 for health consumers, patients, their families and carers, and the broader community in New South Wales, Australia. A series of semi-structured virtual group discussions were conducted with 33 health consumers and community members between August 24 and August 31, 2020. Data were analyzed using an inductive thematic analysis approach. The analysis identified 3 main themes: poor health outcomes for individuals; problems with how health care is designed and delivered; and increasing health inequality. This case study provides insight into the indirect impacts of COVID-19. Health systems can draw on the insights learned as a source of experiential evidence to help identify, monitor and respond to the indirect impacts of COVID-19.


2021 ◽  
Vol 121 (1) ◽  
pp. 33-55
Author(s):  
Amy Thomas ◽  
Beth Marsden

In Australia, Aboriginal peoples have sought to exploit and challenge settler colonial schooling to meet their own goals and needs, engaging in strategic, diverse and creative ways closely tied to labour markets and the labour movement. Here, we bring together two case studies to illustrate the interplay of negotiation, resistance and compulsion that we argue has characterised Aboriginal engagements with school as a structure within settler colonial capitalism. Our first case study explains how Aboriginal families in Victoria and New South Wales deliberately exploited gaps in school record collecting to maintain mobility during the mid-twentieth century and engaged with labour markets that enabled visits to country. Our second case study explores the Strelley mob’s establishment of independent, Aboriginal-controlled bilingual schools in the 1970s to maintain control of their labour and their futures. Techniques of survival developed in and around schooling have been neglected by historians, yet they demonstrate how schooling has been a strategic political project, both for Aboriginal peoples and the Australian settler colonial state.


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