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1. Buffering new risks? Environmental, social and economic changes in the Turkana Basin during and after the African Humid Period

   https://doi.org/10.1177/09596836221121766  

   Hildebrand, Elisabeth; Grillo, Katherine M.; Chritz, Kendra L.; Fischer, Markus L.; Goldstein, Steven T.; Janzen, Anneke; Junginger, Annett; Kinyanjui, Rahab N.; Ndiema, Emmanuel; Sawchuk, Elizabeth; et al (October 2022, The Holocene)

   This paper evaluates risk-oriented frameworks for explaining environmental, social, and economic changes faced by fishing and herding communities in the Turkana Basin during and after the African Humid Period (AHP, 15–5 ka). The orbitally-forced AHP created moist conditions, high lake levels, and unusual hydrological connections across much of northern and eastern Africa. As arid conditions set in and rainfall decreased between 5.3 and 3.9 ka in eastern Africa, Lake Turkana (NW Kenya) shrank dramatically. Shoreline retreat coincided with an expansion of open plains, creating new ecological conditions and potential opportunities for early herders in the basin. In this changing landscape, economies shifted from food procurement (fishing/hunting aquatic resources) to food production (herding), likely through both in-migration by pastoralists and adoption of herding by local fishers. Early pastoralists also built at least seven megalithic pillar sites that served as communal cemeteries during this time. Recent research has shown that local environmental dynamics – both during and after the AHP – were complex, demanding a more careful interrogation of the notion that post-AHP life entailed new and/or heightened risks. Risk-buffering strategies might include mobility, diversification, physical storage, and exchange. Archaeologists working around Lake Turkana have proposed that economic shifts from fishing to pastoralism entailed increased mobility as a risk-buffering strategy to deal with aridity and resource unpredictability, and that pillar sites – as fixed landmarks in an unstable landscape – provided settings for congregation and exchange amongst increasingly mobile herding communities. However, recent research has shown that local environmental dynamics in the Lake Turkana basin – both during and after the AHP – were more complex than previously thought, necessitating re-evaluation of the notion that post-AHP life entailed new and/or heightened risks. Here, we explore risk buffering strategies (e.g. mobility, diversification, physical storage and/or exchange) as only one category of potential explanation for the new social practices observed in the region at this time. Gauging their applicability requires us to (a) assess the spatial mobility of communities and individuals interred at pillar sites; (b) evaluate whether and how mobility strategies may have changed as pastoralism supplanted fishing; and (c) examine alternative explanations for social and economic changes. 

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2. Preventing Cardiovascular Disease Among Urban African Americans With a Mobile Health App (the MOYO App): Protocol for a Usability Study

   https://doi.org/10.2196/16699  

   Taylor Jr, Herman A; Francis, Sherilyn; Evans, Chad Ray; Harvey, Marques; Newton, Brittney A; Jones, Camara P; Akintobi, Tabia Henry; Clifford, Gari (January 2020, JMIR Research Protocols)

   null (Ed.)

   Background Cardiovascular disease (CVD) disparities are a particularly devastating manifestation of health inequity. Despite advancements in prevention and treatment, CVD is still the leading cause of death in the United States. Additionally, research indicates that African American (AA) and other ethnic-minority populations are affected by CVD at earlier ages than white Americans. Given that AAs are the fastest-growing population of smartphone owners and users, mobile health (mHealth) technologies offer the unparalleled potential to prevent or improve self-management of chronic disease among this population. Objective To address the unmet need for culturally tailored primordial prevention CVD–focused mHealth interventions, the MOYO app was cocreated with the involvement of young people from this priority community. The overall project aims to develop and evaluate the effectiveness of a novel smartphone app designed to reduce CVD risk factors among urban-AAs, 18-29 years of age. Methods The theoretical underpinning will combine the principles of community-based participatory research and the agile software development framework. The primary outcome goals of the study will be to determine the usability, acceptability, and functionality of the MOYO app, and to build a cloud-based data collection infrastructure suitable for digital epidemiology in a disparity population. Changes in health-related parameters over a 24-week period as determined by both passive (eg, physical activity levels, sleep duration, social networking) and active (eg, use of mood measures, surveys, uploading pictures of meals and blood pressure readings) measures will be the secondary outcome. Participants will be recruited from a majority AA “large city” school district, 2 historically black colleges or universities, and 1 urban undergraduate college. Following baseline screening for inclusion (administered in person), participants will receive the beta version of the MOYO app. Participants will be monitored during a 24-week pilot period. Analyses of varying data including social network dynamics, standard metrics of activity, percentage of time away from a given radius of home, circadian rhythm metrics, and proxies for sleep will be performed. Together with external variables (eg, weather, pollution, and socioeconomic indicators such as food access), these metrics will be used to train machine-learning frameworks to regress them on the self-reported quality of life indicators. Results This 5-year study (2015-2020) is currently in the implementation phase. We believe that MOYO can build upon findings of classical epidemiology and longitudinal studies like the Jackson Heart Study by adding greater granularity to our knowledge of the exposures and behaviors that affect health and disease, and creating a channel for outreach capable of launching interventions, clinical trials, and enhancements of health literacy. Conclusions The results of this pilot will provide valuable information about community cocreation of mHealth programs, efficacious design features, and essential infrastructure for digital epidemiology among young AA adults. International Registered Report Identifier (IRRID) DERR1-10.2196/16699 

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3. Urbanization as a facilitator of gene flow in a human health pest

   https://doi.org/10.1111/mec.14783  

   Miles, Lindsay S.; Johnson, J. Chadwick; Dyer, Rodney J.; Verrelli, Brian C. (July 2018, Molecular Ecology)

   Abstract Urban fragmentation can reduce gene flow that isolates populations, reduces genetic diversity and increases population differentiation, all of which have negative conservation implications. Alternatively, gene flow may actually be increased among urban areas consistent with an urban facilitation model. In fact, urban adapter pests are able to thrive in the urban environment and may be experiencing human‐mediated transport. Here, we used social network theory with a population genetic approach to investigate the impact of urbanization on genetic connectivity in the Western black widow spider, as an urban pest model of human health concern. We collected genomewide single nucleotide polymorphism variation from mitochondrial and nuclear double‐digest RAD (ddRAD) sequence data sets from 210 individuals sampled from 11 urban and 10 nonurban locales across its distribution of the Western United States. From urban and nonurban contrasts of population, phylogenetic, and network analyses, urban locales have higher within‐population genetic diversity, lower between‐population genetic differentiation and higher estimates of genetic connectivity. Social network analyses show that urban locales not only have more connections, but can act as hubs that drive connectivity among nonurban locales, which show signatures of historical isolation. These results are consistent with an urban facilitation model of gene flow and demonstrate the importance of sampling multiple cities and markers to identify the role that urbanization has had on larger spatial scales. As the urban landscape continues to grow, this approach will help determine what factors influence the spread and adaptation of pests, like the venomous black widow spider, in building policies for human and biodiversity health. 

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4. The earliest herders of East Asia: Examining Afanasievo entry to Central Mongolia

   https://doi.org/10.1016/j.ara.2021.100264  

   Honeychurch, William; Rogers, Leland; Chunag, Amartuvshin; Diimaajav, Erdenebaatar; Erdene-Ochirc, Nasan-Ochir; Hall, Mark E.; Hrivnyakf, Michelle (June 2021, Archaeological research in Asia)

   null (Ed.)

   The Afanasievo world reportedly overlaps the borders of five nations including two countries of East Asia: Mongolia and China. Across these several regions, the first appearance of domestic herd animals (sheep, goat, cattle) and the initial practice of copper and bronze metallurgy are associated with Afanasievo communities. Since mobile pastoralism has long been a significant part of the Mongolian cultural tradition the question of when, where, and how Afanasievo groups entered Mongolia is of extreme interest to archaeologists. Over the past 50 years several important sites have been reported and analyzed but these are still little known among Western scholars. In this study we provide a brief overview of Afanasievo archaeology, its peripheries, and its recent analytical breakthroughs and then develop a unique perspective on the Afanasievo world from its farthest eastern edge in central Mongolia. We assess the different roles of migration and diffusion in the process of herd animal introduction and present two current hypotheses explaining the intensification of pastoralism in this region during the late 3rd and early 2nd millennium BC. We argue that the impact of Afanasievo entry into East Asia was a transformative process but must be understood in the context of significant innovations made by East Asian indigenous communities, eventually leading to a unique form of eastern steppe pastoralism in Mongolia. 

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5. Identifying latent activity behaviors and lifestyles using mobility data to describe urban dynamics

   https://doi.org/10.1140/epjds/s13688-023-00390-w  

   Yang, Yanni; Pentland, Alex; Moro, Esteban (May 2023, EPJ Data Science)

   Abstract Urbanization and its problems require an in-depth and comprehensive understanding of urban dynamics, especially the complex and diversified lifestyles in modern cities. Digitally acquired data can accurately capture complex human activity, but it lacks the interpretability of demographic data. In this paper, we study a privacy-enhanced dataset of the mobility visitation patterns of 1.2 million people to 1.1 million places in 11 metro areas in the U.S. to detect the latent mobility behaviors and lifestyles in the largest American cities. Despite the considerable complexity of mobility visitations, we found that lifestyles can be automatically decomposed into only 12 latent interpretable activity behaviors on how people combine shopping, eating, working, or using their free time. Rather than describing individuals with a single lifestyle, we find that city dwellers’ behavior is a mixture of those behaviors. Those detected latent activity behaviors are equally present across cities and cannot be fully explained by main demographic features. Finally, we find those latent behaviors are associated with dynamics like experienced income segregation, transportation, or healthy behaviors in cities, even after controlling for demographic features. Our results signal the importance of complementing traditional census data with activity behaviors to understand urban dynamics. 

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