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- Junno, Aripekka, 1986-
(författare)
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Bringing home animals : Final-stage Jomon and Okhotsk Culture food technologies
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In this thesis, organic residues preserved in ancient pottery are used to reconstruct diversity andchange in the foodways of Late Holocene hunter-gatherer communities in coastal northern Hokkaido(1750 BCE–1250 CE). The Late Holocene period of this region is very dynamic, and characterised by numerous migrations and cultural replacements. The research into these processes has generally focused on typological variation in pottery, which is a device each of the period’s different culturesmade widespread use of. This thesis takes a novel approach, and uses pottery residue analysis to investigate long-term patterns of continuity and change in cooking practices, employing the conceptof cuisine to interpret the results. In particular, the Okhotsk Cultures (400–1100 CE) form a central focus of the thesis, and their complex animal cosmology, diverse subsistence and multifaceted household activities offer a rich context in which to examine changing foodways.The primary goal is understanding long-term and “macro-scale” patterns of continuity and change, and this also requires improving existing chronological frameworks, which largely rely on pottery typologies rather than radiocarbon dating. Refining and improving existing chronologies therefore forms the second goal of the thesis. The third goal is to examine foodways at a morecontextual “micro-scale”. This involves studying how pottery use was organised within the domestic space of a single Okhotsk Culture long-house, and how these practices were informed by social relations and the cosmology of human-animal interactions.The present thesis consists of an extended introduction, which sets the research in a wider regional and culture-historical setting, and also presents the main methods, concepts and approaches. The central research question is whether the close association between use of pottery and the processing of aquatic resources, which was established by the Early Holocene, does in fact persist into these Late Holocene cultures. The core of the thesis tackles this question by presenting five journal articles, which focus on the archaeological sites of Hamanaka 2, Kafukai 1 and 2, and Menashidomari. The overall results indicate that this older pattern was starting to break down, and that a range of new and more diverse cooking practices was emerging. The thesis also demonstrates that these important shifts in cuisine can also be tied into much higher-resolution chronological frameworks using new methods and approaches. Finally, the “micro-scale” analysis of containerfunction within a single household suggests that some sort of symbolic distinction was made between different sources of foods.
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| 2. |
- Dury, Jack, 1993-
(författare)
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Dealing With Reservoir Effects in Human and Faunal Skeletal Remains : Understanding the radiocarbon dating of aquatic samples
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Archaeology relies on the ordering of past events to study cultural developments. This has traditionally been achieved by looking at the stratigraphic depths of materials relative to one another. In this way, chronologies of past technological progressions and stylistic changes can be built. The introduction of radiocarbon dating in the 1950s revolutionised archaeology, allowing for direct, numerical estimates of a sample’s age. This allowed for more detailed past chronologies than was previously possible. Radiocarbon dating utilises the radioactive decay of carbon-14 (radiocarbon, 14C) to estimate a sample’s age with older samples having less 14C. Shortly after the introduction of radiocarbon dating, however, it was demonstrated that 14C is not evenly distributed globally. Typically, there is less 14C in marine (and sometimes freshwater) systems compared to the atmosphere. This results in aquatic samples appearing older than they are, a phenomenon known as a ‘reservoir effect’. When radiocarbon dating material from archaeological sites with marine activity, this is an important consideration. With aquatic resources being vital for human populations across the globe and for millennia, the ability to interpret aquatic radiocarbon dates is incredibly important. Making use of radiocarbon dates without properly handling any reservoir effects have proved problematic, sometimes resulting in archaeologically incorrect chronologies being constructed. Reservoir effects can, however, be managed. This thesis demonstrates how archaeologists should interpret radiocarbon dates from aquatic samples, avoiding erroneously-old age estimates. Through careful sample selection, considering complicated carbon source mixing, measuring the scale and variability of reservoir effects within a single ecosystem and using prior knowledge about a sample’s age, the dating of aquatic material can be greatly improved. This thesis also details a novel method of dating teeth, reducing uncertainty, and concomitantly estimating the extent of the reservoir effect. This was achieved by dating dental increments, combined with complex modelling. It is clear that there is no single method of handling reservoir effects, and methods for dealing with reservoir effects will differ depending on the archaeological site and specific research question. In this thesis, novel and existing methods of dealing with reservoir effects are demonstrated by considering five case studies from four archaeological sites:At the site of Hamanaka 2 (Rebun Island, Japan), it is demonstrated that by carefully selecting samples without reservoir effects, the dating of the stratigraphy of the site can be accurately modelled. Concerning the cemetery site of Rounala (northern Sweden), it is demonstrated that by carefully reconstructing complex human diets, the dating of humans can be modelled to a high resolution. This has implications for the understanding of the Church’s relationship with the cemetery. At the site of Ekven (Chukotka, Bering Strait) reservoir effect variability between species is carefully described. A more detailed understanding of regional reservoir effects allows for more accurate dating of human remains from the marine hunting Old Bering Sea culture. More accurate dating of human remains allows for the refining of existing Old Bering Sea culture chronologies. Finally, concerning the material from Resmo (Ӧland, Sweden), a novel dental wiggle matching model is presented as a possible method for reducing dating uncertainty in individuals with a marine dietary component.
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| 4. |
- Quintana, Megan T, et al.
(författare)
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Cresting Mortality : Defining a Plateau in Ongoing Massive Transfusion
- 2022
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Ingår i: Journal of Trauma and Acute Care Surgery. - : Lippincott Williams & Wilkins. - 2163-0755 .- 2163-0763. ; 93:1, s. 43-51
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Blood-based balanced resuscitation is a standard of care in massively bleeding trauma patients. No data exists as to when this therapy no longer significantly affects mortality. We sought to determine if there is a threshold beyond which further massive transfusion will not affect in-hospital mortality.METHODS: The Trauma Quality Improvement database was queried for all adult patients registered between 2013 and 2017 who received at least one unit of blood (PRBC) within 4 hours of arrival. In-hospital mortality was evaluated based on the total transfusion volume (TTV) at 4 and 24 hours in the overall cohort (OC) and in a balanced transfusion cohort (BC), composed of patients who received transfusion at a ratio of 1:1-2:1 PRBC-to-plasma. A bootstrapping method in combination with multivariable Poisson regression (MVR) was used to find a cutoff after which additional transfusion no longer affected in-hospital mortality. MVR was used to control for age, sex, race, highest abbreviated injury score in each body region, comorbidities, advanced directives limiting care, and the primary surgery performed for hemorrhage control.RESULTS: The OC consisted of 99,042 patients of which 28,891 and 30,768 received a balanced transfusion during the first 4 and 24 hours, respectively. The mortality rate plateaued after a TTV of 40.5 units (95% CI, 40-41) in the OC at 4 hours and after a TTV of 52.8 units (95% CI, 52-53) at 24 hours following admission. In the BC, mortality plateaued at a TTV of 39 units (95% CI, 39-39) and 53 units (95% CI, 53-53) at 4- and 24-hours following admission, respectively.CONCLUSION: Transfusion thresholds exist beyond which ongoing transfusion is not associated with any clinically significant change in mortality. These TTVs can be used as markers for resuscitation timeouts in order to assess the plan of care moving forward.LEVEL OF EVIDENCE: Level V, prognostic and epidemiological.
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| 5. |
- Sjölander, Mattias, 1988-
(författare)
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Blinded by the light : developing models of settlement and mobility with the use of spectroscopy and exploratory methods
- 2024
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In this thesis an exploratory approach has been used to study settlement and mobility among hunter-gatherer societies in Northern Sweden during the 2 000 – 0 BC period. The focus has been on developing the topics of bifacial point use and raw material management of quartzand quartzite materials. The study combines the information generated at multiple analytical scales in order to address knowledge gaps and facilitate new research. The thesis consists of an introductory text and four research papers.The first paper discusses modelling approaches in archaeology. It stresses the interlinked nature of models that are created at different spatial scales, and that weaknesses in lower-lying models may impact higher-level models in a study. The paper also discusses the question of whether an analysis is better suited for modelling in the “variable space”, rather than geographical space, as the data my need to undergo unnecessary simplification that hides certain features.The second paper is an evaluation of the current dating evidence for bifacial points made of quartz or quartzite in Norrland. The study includes 124 radiocarbon datesfrom 30 excavated sites with finds of bifacial points or preforms in the County of Västerbotten. Bayesian modelling is used to evaluate the potential for building a chronological model for bifacial point use in the region. The results indicate that few artefacts can be related to a dated feature, with only 3 dates that may be argued to stem from a secure dating context that dates the points. These dates all fall within the 1 900 – 1 700 BC period.The third paper is a spectroscopic study of quartz and quartzite material. The study is based on a dataset of 126 quartz/quartzite points and preforms from 47 sites along the upper Ångerman River. Non-destructive analysis was performed using three different spectroscopic instrumentations (Near Infrared, Raman, X-Ray Fluorescence). The data were evaluated using Exploratory Data Analysis (EDA). Each instrumentation showed detectable differences in the material, such as the presence or absence of graphite. The study highlights the potential of non-destructive screening methods and lays the foundation for future survey efforts.The fourth paper is a spatial analysis of the distribution of bifacial points and preforms made of quartz and quartzite within the County of Västerbotten. The Ångerman and Ume/Vindel Rivers exhibit different distribution patterns, with higher proportions of preforms closer to the mountains. The distribution pattern is evaluated using Exploratory Data Analysis, including geostatistical methods. The capacity for previous settlement and mobility models to explain the observed patterns are then discussed in the light of factors such as archaeological survey coverage.
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| 6. |
- Zebley, James A., et al.
(författare)
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Racial Disparities in Administration of Venous Thromboembolism Prophylaxis After Severe Traumatic Injuries
- 2023
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Ingår i: The American surgeon. - : Southeastern Surgical Congress. - 0003-1348 .- 1555-9823. ; 89:11, s. 4696-4706
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Race is associated with differences in quality of care process measures and incidence of venous thromboembolism (VTE) in trauma patients. We aimed to investigate if racial disparities exist in the administration of VTE prophylaxis in trauma patients.METHODS: We queried the Trauma Quality Improvement Project database from 2017 to 2019. Patients ages ≥16 years old with ISS ≥15 were included. Patients with no signs of life on arrival, any AIS ≥6, hospital length of stay <1 day, anticoagulant use before admission, or without recorded race were excluded. Patients were grouped by race: white, black, Asian, American Indian, and Native Hawaiian or Pacific Islander. The association between VTE prophylaxis administration and race was determined using a Poisson regression model with robust standard errors to adjust for confounders.RESULTS: A total of 285,341 patients were included. Black patients had the highest rates of VTE prophylaxis exposure (73.8%), shortest time to administration (1.6 days), and highest use of low molecular weight heparin (56%). Black patients also had the highest incidence of deep vein thrombosis (2.8%) and pulmonary embolism (1.4%). Black patients were 4% more likely to receive VTE prophylaxis than white patients [adj. IRR (95% CI): 1.04 (1.03-1.05), P < .001]. American Indians were 8% less likely to receive VTE prophylaxis [adj. IRR (95% CI): .92 (.88-.97), P < .001] than white patients. No differences between white and Asian or Native Hawaiian or Pacific Islander patients existed.DISCUSSION: While black patients had the highest incidence of DVT and PE, they had higher administration rates and earlier initiation of VTE prophylaxis. Further work can elucidate modifiable causes of these differences.
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