Archaeology Maxent ENMeval predictive model site potential model

Call for Volunteers–Test of an Archaeological Site Potential Model

The National Forests and Grasslands in Texas and the Center for Regional Heritage Research would like to invite you to participate in a large public archaeology/outreach opportunity from February 18 – March 3, 2018 (two one-week sessions) to test and evaluate an archaeological site potential model for the Davy Crockett National Forest (http://www.passportintime.com/site-testing-on-the-davy-crockett-2018.html). This is a national call for volunteers, and is limited to 40 participants; however, we wanted to open the opportunity to locally-interested colleagues and students in advance of the formal announcement (no prior experience required). Registration is required by January 1, 2018 for all participants through the USFS Passport in Time website. Register by visiting the link above and filling out the short application using the Apply Now tab immediately below the image of the dart points.

Additional information included in the link above.

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Nova Publicação para Cerâmica Calderon

 

Valentin Calderón figura como um dos pioneiros da arqueologia no Nordeste do Brasil. Membro do Programa Nacional de Pesquisas Arqueológicas entre as décadas de 1960 e 70, foi responsável pelos levantamentos sistemáticos nos sítios arqueológicos do estado da Bahia e identificou a tradição cerâmica Aratu. Calderón foi também o idealizador do Museu de Arqueologia e Etnologia da Universidade Federal da Bahia (MAE/UFBA), que hoje salvaguarda sua coleção arqueológica e seu arquivo pessoal. Em uma parceria realizada com pesquisadores do Center for Regional Heritage Research da Stephen F. Austin University, Texas, EUA, os artefatos cerâmicos da coleção Valentin Calderón foram digitalizados através do uso de tecnologias 3D. No total, foram escaneados 27 objetos cerâmicos, dentre vasilhames e urnas funerárias. A iniciativa ofereceu subsídios para pensar a digitalização como forma de preservação, principalmente no que se refere à conservação e restauração, documentação e comunicação do acervo. Os modelos 3D resultantes do processo de digitalização permitem uma análise detalhada dos artefatos e obtenção de dados sem a manipulação direta, contribuindo de forma relevante para a preservação dos acervos. Os dados e modelos serão, em breve, disponibilizados para a pesquisa e também utilizados na nova exposição de longa duração do MAE/UFBA.

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robert z selden jr, archaeology, archeology, geometric morphometric, ceramic, analysis, mathematics, statistics, 3d, 3d scan

NAGPRA for Archeologists

For those interested in all things NAGPRA, consider attending the NAGPRA for Archeologists: Methods, Dialogue, and Technologies workshop at The Old Mint Museum in New Orleans, Louisiana August 15-18, 2017. From the National Center for Preservation Technology and Training site:

NCPTT, the friends of NCPTT, and the National NAGPRA Program will partner to offer a four-day course on the statute, regulations, requirements, and compliance aspects of NAGPRA. The objective is to introduce participants to the purpose and requirements of NAGPRA. Classroom instruction will include discussions with NAGPRA representatives from Indian tribes who will share their responsibilities and experiences. The workshop will conclude with demonstrations of innovative technologies that can be used for documenting artifacts prior to repatriation as well as for current and future research.

I will be there to discuss the work that we are doing with the Caddo Nation of Oklahoma, and to illustrate how we are capturing, analyzing and curating 3D data associated with Caddo NAGPRA materials. Further details, including the option to register for this workshop, can be found on the NCPTT website (here).

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robert z selden jr, archaeology, archeology, geometric morphometric, ceramic, analysis, mathematics, statistics, 3d, 3d scan

New Publication in  DAACH

https://doi.org/10.1016/j.daach.2017.04.003

While pursuing a study of 3D geometric morphometrics for ceramic burial vessels that often articulate with the Native American Graves Protection and Repatriation Act (NAGPRA) from the ancestral Caddo region, there have been no shortage of potentially meaningful observations, one of which–rotational asymmetry in coil-built vessels–is discussed in this publication. Using Geomagic Design X (reverse-engineering software) and Geomagic Control X (computer aided inspection software), metrics associated with rotational asymmetry were generated then analyzed.

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Vessels can be sectioned, where the deviations for a specific spline can be extracted for a more in-depth analysis.

Results indicate variable asymmetry among the different vessel shapes (i.e., bottles, jars, etc.), which may augment and strengthen studies and discussions of vessel form. Future directions include the incorporation of directional and–possibly–fluctuating asymmetry measures for the widest vessel profiles. Preliminary results point toward substantive analytical gains that can be used to augment more traditional ceramic analyses as well as geometric morphometric studies of ceramic vessel shape.

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Results of the asymmetry analysis.

In addition to the analysis of rotational asymmetry, there is a brief discussion for analyses of (directional and fluctuating) asymmetry using geometric morphometrics. While the bulk of that discussion remains the topic of another paper, the citation network for asymmetry studies that use geometric morphometrics was included in this paper, and can be accessed by clicking on the image or the link below.

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Directed bipartite citation network for studies of asymmetry using geometric morphometrics. Access the network here.

Link to the publication here, and view the 3D models of the Caddo vessels from the Washington Square Mound site here.  Links to the digital repository where you can download these data are included in the publication.

Many thanks to the Caddo Nation of Oklahoma for the requisite permissions needed to scan the vessels, and to the Anthropology and Archaeology Laboratory for access. 

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robert z selden jr, gault, clovis, 3d, 3d scan, 3d model, projectile point, dart point, texas, culture, history, prehistory, heritage

Preprint available on SocArXiv

Now available on SocArXiv – download here. The paper includes a 3D figure–preprint must be downloaded then opened in your PDF viewer to activate the 3D model. Learn more about how to interact with a 3D PDF here. Many thanks to the folks at the Open Science Framework, SocArXiv and Overleaf. This data paper is currently in review.

DOI 10.17605/OSF.IO/9YD7J | ARK c7605/osf.io/9yd7j

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