Comment on "Localized behavior near the Zn impurity in YBa2Cu4O8 as measured by nuclear quadrupole resonance"

Williams and Kramer [Phys. Rev. B {\bf 64}, 104506 (2001)] have recently argued against the existence of staggered magnetic moments residing on several lattice sites around Zn impurities in YBCO superconductors. This claim, which is in line with an earlier publication by Williams, Tallon and Dupree [Phys. Rev. B {\bf 61}, 4319 (2000)], is however in contradiction with a large body of experimental data from different NMR groups. On the contrary, the authors argue in favor of a very localized spin and charge density on Cu sites first neighbors to Zn. We show that the conclusions of Williams and Kramer arise from erroneous interpretations of NMR and NQR data.Comment: 4 page

Williams, L. (2016). Emblem of faith untouched: A short life of Thomas Cranmer (Book Review)

Williams, L. (2016). Emblem of faith untouched: A short life of Thomas Cranmer. Grand Rapids, MI: Wm. B. Eerdmans. 208 pp. $18.00. ISBN 978080287418

Framing Madame B: Quotation and Indistinction in Mieke Bal and Michelle Williams Gamaker’s Video Installation

The article engages with the video installation Madame B by Mieke Bal and Michelle Williams Gamaker. The work was premiered in the city of Łódź in Poland (between 6 Dec. 2013 and 9 Feb. 2014). The author makes use of the exhibition brochure by two artists published by the Museum of Modern Art, and the recording of a seminar held by Bal and Williams Gamaker after launching their work. The article focuses on the innovative audiovisual interpretation of Flaubert’s famous novel. Basing the argument on the concept of framing created by Bal, the author applies it to Bal and Williams Gamaker’s exhibition by relating it to the history and culture of the Polish location where it was first shown. Above all, however, the article discusses the importance of quotation and indistinction in Madame B, where the artists quote from (among others): Louise Bourgeois, Maya Deren, Artemisia Gentileschi, Charlotte Perkins Gilman, William Kentridge and Sol LeWitt

Alexander Duality and Rational Associahedra

A recent pair of papers of Armstrong, Loehr, and Warrington and Armstrong, Williams, and the author initiated the systematic study of {\em rational Catalan combinatorics} which is a generalization of Fuss-Catalan combinatorics (which is in turn a generalization of classical Catalan combinatorics). The latter paper gave two possible models for a rational analog of the associahedron which attach simplicial complexes to any pair of coprime positive integers a < b. These complexes coincide up to the Fuss-Catalan level of generality, but in general one may be a strict subcomplex of the other. Verifying a conjecture of Armstrong, Williams, and the author, we prove that these complexes agree up to homotopy and, in fact, that one complex collapses onto the other. This reconciles the two competing models for rational associahedra. As a corollary, we get that the involution (a < b) \longleftrightarrow (b-a < b) on pairs of coprime positive integers manifests itself topologically as Alexander duality of rational associahedra. This collapsing and Alexander duality are new features of rational Catalan combinatorics which are invisible at the Fuss-Catalan level of generality.Comment: 23 page

An idealised wave-ice interaction model without subgrid spatial and temporal discretisations

A modified version of the wave-ice interaction model proposed by Williams et al (2013a,b) is presented for an idealised transect geometry. Wave attenuation due to ice floes and wave-induced ice fracture are both included in the wave-ice interaction model. Subgrid spatial and temporal discretisations are not required in the modified version of the model, thereby facilitating its future integration into large-scaled coupled models. Results produced by the new model are compared to results produced by the original model of Williams et al (2013b).Comment: 8 pages, 3 figure

Documentation of Ancestral Caddo Ceramic Vessels from the Harold Williams Site (41CP10), Camp County, Texas

The Harold Williams site (41CP10) is a large ancestral Caddo community cemetery on Dry Creek in the Big Cypress Creek basin in Camp County, Texas. Caddo burials and associated ceramic vessel funerary offerings have been discovered and dug at the Harold Williams site since the 1940s, and in 1967 the Texas Archeological Society (TAS) held their annual field school at the site. During the course of the 1967 TAS excavations in Area A and B, several burial features were encountered and excavated, and these had associated ceramic vessels and other grave goods. These vessels were illustrated and cursorily described by Turner and Smith, and they were from Late Caddo period Titus phase graves. Recently two boxes of TAS Field School materials from the Harold Williams site were re-examined at the Texas Archeological Research Laboratory, and a number of whole and partial Caddo ceramic vessels from the TAS work were re-discovered. I took the opportunity to examine and document these vessels in detail, and the results of these analyses are presented in this article