Anvil Boulders and Lithic Reduction on Southern Victoria Island, Northwest Territories

This paper reports on an unusual archaeological feature discovered at the Cadfael site (NiNg-17) on southeastern Victoria Island. Two large boulders apparently served as anvil stones on which quartzite cobbles were fractured. Lithic debris remained in situ on and around the boulders, preserving the materials and spatial arrangements as abandoned by the last flintknappers. Analysis of one boulder and the associated artifacts demonstrates that a bipolar technology was employed to split cobbles, presumably to obtain large flakes for use as, or for making into, tools. As far as is known, no similar features have been reported in the literature on the Canadian Arctic, although potential candidates exist on Baffin Island and at Great Bear Lake. The age and cultural affiliation of the Cadfael site anvil boulders are undetermined; however an association with the Late Dorset culture, dating to about 1000 years ago, seems most likely.Key words: arctic archaeology, lithic technology, Dorset culture, Victoria IslandRÉSUMÉ. Cette communication concerne la découverte d’un aménagement archéologique plutôt inhabituel trouvé au site Cadfael (NiNg-17), situé au sud de l’île Victoria. Deux grosses pierres y auraient apparemment servies d’enclumes où l’on aurait cassé des galets de quartzite. Les débrislithiques étaient restés in situ sur et autour des grosses roches, préservant ainsi le materiel et les arrangements spatiaux tels qu’abandonnés par les derniers artisans de la pierre. L’analyse d’une de ces grosses pierres et des artefacts qui y étaient associés, a démontré qu’une technique bipolaire fututilisée pour fendre les galets afin d’obtenir de gros éclats utilisés comme d’outils ou dans la fabrication de ces derniers. Il semble que jusqu’ici aucun aménagement similaire n’a été rapporté dans la littérature concernant l’arctiquce canadien, bien que des candidats possibles existent sur la Terre de Baffin et au Grand Lac de l’ Ours. Bien que l’âge et l’affiliation culturelle des énormes enclumes du site Cadfael soient indéterminés, une association avec la période récente de la culture dorsétienne, soit il y a environ 1000 ans avant le présent, est vraisemblable.Mots clés: archéologie de l’Arctique, technologie lithique, culture dorsétienne, île Victori

Review of \u3ci\u3eHell Gap: A Stratified Paleoindian Campsite at the Edge of the Rockies. \u3c/i\u3eEdited by Mary Lou Larson, Marcel Kornfeld, and George C. Frison.

Every Plains archaeologist has heard of the Hell Gap site. But few could tell you much about it. All that changes with the publication of this needed, dense, thorough collection that chronicles the life and content of this singularly important archaeological site. With 20 papers and 13 appendices, this book takes a monumental step forward in furthering our knowledge of nearly the entire Paleoindian sequence of occupation on the western Plains. Hell Gap is the type site for three Paleoindian point styles: Goshen, Hell Gap, and Frederick, and contains at least six other cultural complexes: Folsom, Midland, Agate Basin, Alberta, Eden/Scottsbluff, and Lusk. All in a stratified and fairly well-dated sequence. There are hints of Clovis, but the jury is still out. Located in eastern Wyoming, the Hell Gap site was discovered when amateur collector 1. Duguid picked up a complete Agate Basin point in 1958 (the first appendix tells his story). Sharing that information led to years of excavation by a virtual who\u27s who in the history of Plains archaeology. Previously known by a few short articles and unpublished works, this volume is the first major synthesis of one of the most studied and significant sites in the Plains

Review of \u3ci\u3eHell Gap: A Stratified Paleoindian Campsite at the Edge of the Rockies. \u3c/i\u3eEdited by Mary Lou Larson, Marcel Kornfeld, and George C. Frison.

Every Plains archaeologist has heard of the Hell Gap site. But few could tell you much about it. All that changes with the publication of this needed, dense, thorough collection that chronicles the life and content of this singularly important archaeological site. With 20 papers and 13 appendices, this book takes a monumental step forward in furthering our knowledge of nearly the entire Paleoindian sequence of occupation on the western Plains. Hell Gap is the type site for three Paleoindian point styles: Goshen, Hell Gap, and Frederick, and contains at least six other cultural complexes: Folsom, Midland, Agate Basin, Alberta, Eden/Scottsbluff, and Lusk. All in a stratified and fairly well-dated sequence. There are hints of Clovis, but the jury is still out. Located in eastern Wyoming, the Hell Gap site was discovered when amateur collector 1. Duguid picked up a complete Agate Basin point in 1958 (the first appendix tells his story). Sharing that information led to years of excavation by a virtual who\u27s who in the history of Plains archaeology. Previously known by a few short articles and unpublished works, this volume is the first major synthesis of one of the most studied and significant sites in the Plains

Derivation of the exact NSVZ beta-function in N=1 SQED, regularized by higher derivatives, by direct summation of Feynman diagrams

For N=1 supersymmetric quantum electrodynamics, regularized by higher derivatives, a method for summation of all Feynman diagrams defining the beta-function is presented. Using this method we prove that the beta-function is given by an integral of a total derivative, which can be easily calculated. It is shown that surviving terms give the exact NSVZ beta-function. The results are compared with the explicit three-loop calculation.Comment: 38 page

Orthogonality of Jack polynomials in superspace

Jack polynomials in superspace, orthogonal with respect to a ``combinatorial'' scalar product, are constructed. They are shown to coincide with the Jack polynomials in superspace, orthogonal with respect to an ``analytical'' scalar product, introduced in hep-th/0209074 as eigenfunctions of a supersymmetric quantum mechanical many-body problem. The results of this article rely on generalizing (to include an extra parameter) the theory of classical symmetric functions in superspace developed recently in math.CO/0509408Comment: 22 pages, this supersedes the second part of math.CO/0412306; (v2) 24 pages, title and abstract slightly modified, minor changes, typos correcte

Bite Force Estimates in Juvenile Tyrannosaurus Rex Based on Simulated Puncture Marks

BACKGROUND: Bite marks attributed to adult Tyrannosaurus rex have been subject to numerous studies. However, few bite marks attributed to T. rex have been traced to juveniles, leaving considerable gaps in understanding ontogenetic changes in bite mechanics and force, and the paleoecological role of juvenile tyrannosaurs in the late Cretaceous. METHODS: Here we present bite force estimates for a juvenile Tyrannosaurus rex based on mechanical tests designed to replicate bite marks previously attributed to a T. rex of approximately 13 years old. A maxillary tooth of the juvenile Tyrannosaurus specimen BMR P2002.4.1 was digitized, replicated in dental grade cobalt chromium alloy, and mounted to an electromechanical testing system. The tooth was then pressed into bovine long bones in various locations with differing cortical bone thicknesses at varying speeds for a total of 17 trials. Forces required to replicate punctures were recorded and puncture dimensions were measured. RESULTS: Our experimentally derived linear models suggest bite forces up to 5,641.19 N from cortical bone thickness estimated from puncture marks on an Edmontosaurus and a juvenile Tyrannosaurus. These findings are slightly higher than previously estimated bite forces for a juvenile Tyrannosaurus rex of approximately the same size as BMR P2002.4.1 but fall within the expected range when compared to estimates of adult T. rex. DISCUSSION: The results of this study offer further insight into the role of juvenile tyrannosaurs in late Cretaceous ecosystems. Furthermore, we discuss the implications for feeding mechanisms, feeding behaviors, and ontogenetic niche partitioning

Supersymmetric Calogero-Moser-Sutherland models and Jack superpolynomials

A new generalization of the Jack polynomials that incorporates fermionic variables is presented. These Jack superpolynomials are constructed as those eigenfunctions of the supersymmetric extension of the trigonometric Calogero-Moser-Sutherland (CMS) model that decomposes triangularly in terms of the symmetric monomial superfunctions. Many explicit examples are displayed. Furthermore, various new results have been obtained for the supersymmetric version of the CMS models: the Lax formulation, the construction of the Dunkl operators and the explicit expressions for the conserved charges. The reformulation of the models in terms of the exchange-operator formalism is a crucial aspect of our analysis.Comment: Minor corrections in tables; 30 page

One-loop divergences in the two-dimensional non-anticommutative supersymmetric sigma-model

We discuss the structure of the non-anticommutative N=2 non-linear sigma-model in two dimensions, constructing differential operators which implement the deformed supersymmetry generators and using them to reproduce the classical action. We then compute the one-loop quantum corrections and express them in a more compact form using the differential operators.Comment: 20pp, 8 figures, uses LaTeX. Title expanded to clarify conten

A renormalisable non-anticommutative SU(N)xU(1) gauge theory in components

We discuss the non-anticommutative (N=1/2) supersymmetric SU(N)\otimes U(1) gauge theory including a superpotential. We show how recent proposals for obtaining a renormalisable version of the theory may be implemented in the component formalism at the one-loop level.Comment: 25pp, 14 figures, LaTeX; minor typo fixed, reference added, notation clarifie