Sustainable Archaeology is a digital archaeological research facility and repository making Ontario’s archaeological heritage accessible to all. Dedicated to ensuring a sustainable future for Ontario's archaeological heritage.
One of these items is the real thing - the other has been printed on a ZPrinter (450 model) from Zcorp. Can you tell which is which? The bottle, complete with threads (and fitted cap) and colour label is the printed object.
This week we attended vendor demonstrations by Cimetrix Solutions and Agile Manufacturing for 3D printers as we prepare to purchase this equipment for SA Western. The equipment will be used to print a variety of archaeological materials in 3D, including artifacts scanned using SA's 3D digitizers. 3D printers are widely used in the worlds of manufacturing and prototyping, for everything from machine components to jewellery, to chocolate - even GIS data can be used to print 3D models of landscapes.
The video below features the paper "Digital Artifact Ecosystems: The "Internet of Things" in Archaeology" (Namir Ahmed, Michael Carter, Neal Ferris) presented by Western University MA student Namir Ahmed at the Digital Engagement in Archaeology conference this past week. The conference ran November 8th and 9th at the UCL Institute of Archaeology in London, England.
Other videos from the conference can be viewed at Doug's Archaeology blog. Thanks to Doug for posting these! To see conversations and chatter from the conference, check out the hashtag #digipubarch on Twitter.
The "Yes the Cat" project is an interdisciplinary investigation led by Dr. Andrew Nelson of the Department of Anthropology at Western University. The project is an ongoing study of the effects of mummification on different tissues of the body as demonstrated by the individual of interest - a domestic house cat named Yes.
Yes was mummified at the request of his owner, after dying of natural causes eight years ago. Since the time of the mummification, he has been studied using MR and clinical CT imaging in order to see beneath the exterior wrappings, to examine how the remains have changed over time.
Most recently, Yes the Cat was scanned using Sustainable Archaeology's microCT scanner. The microCT provides an additional means to non-destructively examine Yes the Cat's "afterlife", without removing any of the wrappings or disturbing the remains below. In the video below, Yes's skeleton was isolated from the layers of wrappings, which are digitally removed, allowing for the examination of the skeletal remains.
By isolating different densities, the researchers were also able to
examine the condition of remaining internal organs, such as the heart, seen in red in the image below.
This cross-section, produced using the SA microCT's software, provides a more complete picture of Yes - through the wrappings down to the skeleton, also revealing what remains of the brain, heart and tongue.
Through digital imaging, Yes the Cat will continue to be a source of information about the effects of mummification for years to come, contributing broadly to our understanding of mummification and how mummified remains change over time. These findings can be applied to other cases of mummification, including both humans and other animals.
The Yes the Cat project will be presented at the upcoming Annual Meeting of the Canadian Association for Physical Anthropology at the University of Victoria in Victoria, B.C., on November 13th.
Our third guest blog features the Centre for Sustainable Archaeology at McMaster University in Hamilton, ON. This post was written by Jennifer Walton, a third year anthropology student at McMaster, and Research Assistant at Sustainable Archaeology. The blog features her experience using the Centre'smaterials analysis equipment to examine "microfacts" recovered from the McMaster field school at the Nursery Site (AhGx-8) this past spring.
From the Field to the Lab: Artifacts and “Microfacts” from
the McMaster Archaeological Field School
By: Jennifer Walton,
Honours Anthropology (III), Research Assistant, Centre for Sustainable Archaeology at McMaster Innovation
Park
This
spring I had the opportunity to attend the McMaster University archaeological
field school held at the Nursery Site (AhGx-8) in Cootes Paradise within the
Royal Botanical Gardens. The site dates from approximately 3000 years ago and
was also used as a farmstead during the historic era. During the course of the excavation, we were
responsible for conducting two different types of sub-surface surveys to find
the boundaries of the site and to evaluate the differences between traditional
test-pitting used in cultural resource management, and a finer resolution
method. Each student took standard
test-pit samples using a shovel alongside bucket-auger samples to analyze the
variability in field survey methods.
Understanding the variability in the recovery of artifacts using
different techniques is important because of the history of plowing at the
site, and the fragmented nature of the artifacts we recovered. Test-pit sediment was screened in the field,
following the guidelines set by the Ministry of Culture. The auger samples were
later wet-screened at the Centre for Sustainable Archaeology at McMaster
Innovation Park.
Using the auger at the 2012 field school
Auger
sampling has been used at the Nursery Site since the 2010 field school. Since
the site has been a plough zone for over 50 years, the Nursery Site had
experienced heavy disturbances, resulting in the fragmentation of many of the
artifacts. Auger sampling is useful in this context because it retains the
entire sediment sample and the finer screening method allows for the collection
of smaller artifacts, often resulting in more artifacts per litre of soil
compared to traditional test pitting.
The boundaries of a site should show a decrease in artifact density as
one moves away from the central area of the site, therefore augering is
potentially a more effective way of finding the outer limits of the activity
area, especially in highly disturbed areas.
The
bucket-auger sampling method uses a hand held device (7.5cm bucket-auger) that
is twisted into the ground below the sub-soil to extract an intact sediment
sample. All of the sediment is retained, and once in the Sustainable
Archaeology lab, each auger sample is washed through 2mm mesh, dried, and the
sediment fraction >2mm is examined beneath a stereomicroscope. The sediment
from the test pits, in contrast, is screened in the field through 1/8 inch mesh
and artifacts are picked in the field. It is the difference in these screening
methods, in association with the methods used to identify artifacts that
accounts for the variance in artifact recovery.
In the
lab the auger samples were wet-screened, and the remaining fraction was viewed
under a Zeiss V8 microscope at 10 X magnification to distinguish if the
materials were, in fact “micro” artifacts.
Many research questions can be answered from the analysis of these
samples, such as artifact densities and types of artifacts found in specific
areas of the site or throughout the site as a whole. Site boundaries may also be estimated and
further insight into disturbance levels may be gained. The results from the
auger samples have shown new insights into the artifact densities as well as
the extreme fragmentation of the artifacts, especially calcined bone, ceramics
and tertiary debitage. Using this survey
method and the resources at the Centre for Sustainable Archaeology has allowed
us to identify new areas of the site which can be excavated in future field
seasons.
Examples of the "microartifacts" found in the auger samples, using a Zeiss V.16 axiozoom telecentric microscope at 20 X magnification. From left to right: historic era ceramic; tertiary debitage; calcined bone; pre-contact ceramic)
It's been a while since we've had a construction or building related post to share! Today we received our official signage, including room numbers and designations, as well as a number of exterior signs. It's one of those finishing touches that makes the building really feel polished and functional.
We'd like to take this opportunity to share our newest endeavour: Notes from the SA: The Sustainable Archaeology Newsletter. Our goal is to connect with fellow researchers and with students both in the archaeological community, and on campus at Western. If you have ideas for content, events, lectures, conferences or grants you'd like to share, contact Kira Westby at kwestby2@uwo.ca
