Research Reports from the Programme for Belize Archaeological Project, Volume Seven

Table of Contents : Background and Introduction to the 2012 Season of the Programme for Belize Archaeological Project / by Fred Valdez, Jr. and Grant Aylesworth (p.1-6) -- The Architecture and Environs of Structure 3: 2012 Season / by Debora Trein (p.7-34) -- Report of the 2012 Excavations at the South Ballcourt of La Milpa, Operation A6 / by David Chatelain (p.35-38) -- Overview of the 2012 La Milpa Archaeological Field Season / by Brandon s. Lewis, Yoav Me-Bar, Scott Guzman, and Leon de Santillan (p.39-54) -- Several Burials from La Milpa, LM4 in NW Belize / by Stacy Drake (p.55-58) -- Report in the 2012 Excavations at Hun Tun: Operation 5 / by Robyn L. Dodge (p.59-68) -- Research Results of the 2012 Field Season: Excavations at the Tapir Group of the Medicinal Trail Site / by David M. Hyde (p.67-90) -- Mapping Medicinal Trail: A Summary from 2004 to 2012 / by Jeff Brewer, David M. Hyde, and Michael Stowe (p.91-112) -- The 2012 Season of Survey and Excavation at La Milpa North / by Eric J. Heller (p.113-130) -- Preliminary Investigations at RB 71: The 2012 Field Season / by Nicole DeFrancisco and Cory Stevenson (p.131-140) -- Preliminary Report on the 2012 Field Season at Maax Na and Bolsa Verde, Belize / by Eleanor M. King and Leslie C. Shaw (p.141-154) -- Summary Report of Field Investigations at the Site of Dos Hombres, Summer 2012 Season / by Rissa M. Trachman and Jacob A. Canterbury (p.155-164) -- Field Investigations at Chawak But’o’ob: Preliminary Overview of the 2012 Season / Stan Walling (p.165-178) -- Ancient Maya Land Use and Today’s Environment: A Multidisciplinary Research Program / by Nicholas Brokaw (p.179-186) -- Summary Report of the 2012 Obsidian Provenance Project for PfBAP / by Walter Beckwith (p.187-188) -- Application of Low-Field Magnetic Susceptibility to Plaster Floors in Excavation Profiles at Maya Sites in the Three Rivers Region, Belize / by Michael Brennan (p.189)Texas Archeological Research Laborator

Permeation studies of hydrogen in 304 and 316 stainless steel: the influence of surface oxides

A time varying harmonically modulated flow method, analysed with a two rate constant surface reaction model, provides a series of permeation, Pm, diffusion, D, and surface rate coefficients, k1, k2, for hydrogen passing through 304 and 316 stainless steel. The method developed here allows the evaluation of a consistent set of bulk metal values of D and Pm, in the temperature range 502 < T/K < 963, despite wide ranging surface conditions, and are described by: D304=(1.22±0.06)x10-8exp{[-(6.596±0.049)x103/T]/K-1} m2s-1 Pm304=(4.82±0.21)x10-7exp{[-(7.990±0.044)x103/T]/K-1} molm 1s-1Pa-1/2 D316=(7.28±0.94)x10-7exp{[-(6.296±0.109)x103/T]/K-1} m2s-1 Pm316=(8.09±0.70)x10-7exp{[-(8.189±0.076)x103/T]/K-1} molm-1s-1Pa-1/2 When surfaces are treated to form a stable oxide layer, the surface reaction rate constants are found to be interpretable in terms of molecular flow of hydrogen through the oxide. The permeation coefficients, Pmox, describing this flow are as follows: Pmox3o4=(1.43±0.29)x10-11exp([-7.661±0.081)x103/T)/K-1) molm-1s-1Pa-1Pmox3ls=(5.36±2.68)x10-11exp{[-6.967±0.228)x103/T)/K-1) molm-1s-1Pa-1</sup

Review of Composition in the Age of Austerity, Nancy Welch and Tony Scott, Eds.

This review surveys the edited collection Composition in the Age of Austerity, which works at key intersections of interest to readers of Kairos: the discussion between critical and new materialisms, the debates about economics and digital humanities, and the 2016 election\u27s significance for our future as teachers, scholars, and champions of justice. The navigation bar at the top of each page in this webtext allows for reading in any particular order. The tabs of the navigation bar reflect my own reading across the sections and chapters included in the collection, offering my thinking with and against the premises of both the included works and the volume as a whole

Oxidative stress via hydrogen peroxide and menadione does not induce the secretion of IGFBP-5 in primary rat hepatocytes

Conference abstract describing how oxidative stress via hydrogen peroxide and menadione does not induce the secretion of IGFBP-5 in primary rat hepatocytes. Presented at the 2010 annual congress of the british toxicology societ

Outlook for detecting the gravitational wave displacement and spin memory effects with current and future gravitational wave detectors

Gravitational wave memory effects arise from non-oscillatory components of gravitational wave signals, and they are predictions of general relativity in the nonlinear regime that have close connections to the asymptotic properties of isolated gravitating systems. There are many types of memory effects that have been studied in the literature. In this paper we focus on the "displacement" and "spin" memories, which are expected to be the largest of these effects from sources such as the binary black hole mergers which have already been detected by LIGO and Virgo. The displacement memory is a change in the relative separation of two initially comoving observers due to a burst of gravitational waves, whereas the spin memory is a portion of the change in relative separation of observers with initial relative velocity. As both of these effects are small, LIGO, Virgo, and KAGRA can only detect memory effects from individual events that are much louder (and thus rarer) than those that have been detected so far. By combining data from multiple events, however, these effects could be detected in a population of binary mergers. In this paper, we present new forecasts for how long current and future detectors will need to operate in order to measure these effects from populations of binary black hole systems that are consistent with the populations inferred from the detections from LIGO and Virgo's first three observing runs. We find that a second-generation detector network of LIGO, Virgo, and KAGRA operating at the O4 ("design") sensitivity for 1.5 years and then operating at the O5 ("plus") sensitivity for an additional 1.5 years can detect the displacement memory. For Cosmic Explorer, we find that displacement memory could be detected for individual loud events, and that the spin memory could be detected in a population after 5 years of observation time.Comment: 18+7 pages, 8 figures; v2: fixed typos and errors and re-ran analysis (results unchanged), matches published versio

Neurosteroid Influences on Sensitivity to Ethanol

This review will highlight a variety of mechanisms by which neurosteroids affect sensitivity to ethanol, including physiological states associated with activity of the hypothalamic–pituitary–adrenal (HPA) and hypothalamic–pituitary–gonadal (HPG) axes, and the effects of chronic exposure to ethanol, in addition to behavioral implications. To date, γ-aminobutyric acid (GABAA) receptor mechanisms are a major focus of the modulation of ethanol effects by neuroactive steroids. While NMDA receptor mechanisms are gaining prominence in the literature, these complex data would be best discussed separately. Accordingly, GABAA receptor mechanisms are emphasized in this review with brief mention of some NMDA receptor mechanisms to point out contrasting neuroactive steroid pharmacology. Overall, the data suggest that neurosteroids are virtually ubiquitous modulators of inhibitory neurotransmission. Neurosteroids appear to affect sensitivity to ethanol in specific brain regions and, consequently, specific behavioral tests, possibly related to the efficacy and potency of ethanol to potentiate the release of GABA and increase neurosteroid concentrations. Although direct interaction of ethanol and neuroactive steroids at common receptor binding sites has been suggested in some studies, this proposition is still controversial. It is currently difficult to assign a specific mechanism by which neuroactive steroids could modulate the effects of ethanol in particular behavioral tasks