Bibliographic record
Abstract
Revue des thèses/ Survey of dissertations ARISMENDI, Jacquel Lynn 2015 Ancient mtDNA Sequences from Prehistoric North American ArcticPopulations, Ph.D., University of Utah, Salt Lake City, 152 pages.This study set out to sequence the hypervariable segment-I (HVS-I) of the mitochondrial genome from prehistoric skeletal remains associated with Aleut, Sadlermiut, Dorset, and Thule groups in northern North America in an effort to gain insight into their genetic prehistories.Sequences obtained from said ancient populations (Aleut, n=6; Sadlermiut, n=7; Thule, [partial sequences] n=3) were compared to each other as well as those from contemporary and prehistoric populations in the surrounding area.The prehistoric populations under investigation harbored matrilineages typically found in circum-Arctic populations throughout time: A2, A2a, A2b1, D2/D2a'b/D2a/D2a1 and D4b1a2a1.Ancient Aleuts exhibited HVS-I polymorphisms associated with haplogroups A2a, D2, and D2a'b, while the Sadlermiut were characterized as A2b1 and D4b1a2a1.Partial Thule HVS-I sequences indicate A2 but preclude definitive assignment to A2, A2a, or A2b1 until the remaining portion of HVS-I is sequenced.The results indicate that ancient Aleuts across time exhibit affinities with the Unangax?(modern Aleuts); however, population movement or genetic exchange with neighbors to the east cannot be ruled out at this time.Ancient Aleuts were also found to have a greater matrilineal genetic similarity to Chukotkan populations (Chukchi and Siberian Yuit), rather than those from Kamchatka (Koryak and Itel'men).This genetic similarity/dissimilarity provides additional corroboration for colonization of the Aleutian archipelago being initiated from the east rather than the west.The isolated eastern Arctic Sadlermiut population, on the other hand, was shown to have affinities with contemporary Eskimo (Inuit and Iñupiat).The implications of this points towards the Sadlermiut having Neo-Eskimo rather than Paleo-Eskimo ancestry and echoes previous findings of matrilineal discontinuity in the eastern Arctic.The mtDNA (mitochondrial deoxyribonucleic acid) profiles of the ancient populations in this study are also congruent with results from other mtDNA
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.005 | 0.025 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.008 | 0.004 |
| Open science | 0.003 | 0.004 |
| Research integrity | 0.004 | 0.004 |
| Insufficient payload (model declined to judge) | 0.759 | 0.607 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; the direct Gemma label and the distilled Codex classifier agree on what is shown here.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".