Recent advances in remote sensing have produced global glacier surface elevation change data. Parsing these elevation change signals into contributions from the climate (i.e. climatic mass balance) and glacier dynamics (i.e. flux divergence) is critical to enhance our process-based understanding of glacier change. In this study, we evaluate three approaches for direct, continuous measurements of the climatic mass balance, flux divergence and elevation change at a site on Gulkana Glacier in Alaska using low-cost global navigation satellite system (GNSS) sensors, GNSS interferometric reflectometry (GNSS-IR), banded ablation stakes with time-lapse cameras and combinations thereof. Cumulative climatic mass balance over the season was 4.85 m and the three approaches were within 0.08 m through early July before the snowpack melted, and within 0.28 m through mid-August. The flux divergence increased from 0.52 ± 0.03 cm d−1 before June 3 to about 0.73 cm d−1 after June 27. We demonstrate a single GNSS system fixed atop an ablation stake can measure contemporaneous climatic mass balance, flux divergence and elevation change based on the antenna's position and GNSS-IR techniques. The ability of these systems to measure glacier mass balance and flux divergence offers unique opportunities for year-round observations on mountain glaciers in the future.

We recently reported on the radio-frequency attenuation length of cold polar ice at Summit Station, Greenland, based on bi-static radar measurements of radio-frequency bedrock echo strengths taken during the summer of 2021. Those data also allow studies of (a) the relative contributions of coherent (such as discrete internal conducting layers with sub-centimeter transverse scale) vs incoherent (e.g. bulk volumetric) scattering, (b) the magnitude of internal layer reflection coefficients, (c) limits on signal propagation velocity asymmetries (‘birefringence’) and (d) limits on signal dispersion in-ice over a bandwidth of ~100 MHz. We find that (1) attenuation lengths approach 1 km in our band, (2) after averaging 10 000 echo triggers, reflected signals observable over the thermal floor (to depths of ~1500 m) are consistent with being entirely coherent, (3) internal layer reflectivities are ≈–60$\to$–70 dB, (4) birefringent effects for vertically propagating signals are smaller by an order of magnitude relative to South Pole and (5) within our experimental limits, glacial ice is non-dispersive over the frequency band relevant for neutrino detection experiments.

Benny Goodman and Chick Webb's 1937 battle of music has become a mythic event in jazz historical narratives, enshrined as the unique spectacle that defines Harlem's Savoy Ballroom and its legacy. While this battle has been marked as exceptional and unique, as an event it was a relatively typical instantiation of the “battle of music” format, a presentational genre common in black venues during the 1920s and 1930s. Within African American communities, battles of music re-staged ballrooms as symbolically loaded representational spaces where dueling bands regularly served as oppositional totems that indexed differences of locality (Chicago vs. New York), gender (men vs. women), ethnicity (Anglo- or African American vs. Latin), or race (black vs. white). This article details the ten-year history of battles of music that preceded the Webb/Goodman battle and that made its signifying rhetoric legible within African American communities. It then argues that the disconnect between the battle's relatively typical signifying rhetoric and its subsequent enshrinement as an exceptional event occurred due to a specific confluence of circumstances in the mid-1930s that shaped its immediate reception and subsequent legacy: Goodman's emergence as the “King of Swing” during a new period of massive mainstream popularity for swing music, a coterminous vigilance among both white and black jazz writers to credit black artists as jazz's originators and best practitioners, and the emergence of athletes Jesse Owens and Joe Louis as popular black champions symbolically conquering white supremacy at home and abroad.

We use numerical simulations from the Community Coordinated Modeling Center to provide, for the first time, a coherent temporal description of the magnetic reconnection process of two dayside Electron Diffusion Regions (EDRs) identified in Magnetospheric Multiscale Mission data. The model places the MMS spacecraft near the separator line in these most intense and long-lived events. A listing of 31 dayside EDRs identified by the authors is provided to encourage collaboration in analysis of these unique encounters.

The aim of the study was to compare the psychophysiological pattern associated with obsessive–compulsive disorder (OCD) in clinical patients (n = 13) and checking behaviours in a nonclinical population (n = 13) to evaluate the validity of the anxiety reduction hypothesis. A second objective was to examine the psychophysiological pattern associated with prevention of ritualistic behaviour in the OCD group and of checking behaviour in the control group. A guided imagery methodology was utilised in order to examine the progression of the behaviours over time. Various psychophysiological measures were incorporated to account for the response to personalised imagery presented in four distinct stages. The stages included setting the scene, approach, incident, and consequence. Both the psychophysiological and the subjective response to the ritual/checking and response-prevention/no-checking scripts were higher than to the neutral script for both groups. A trend towards significantly higher heart rate response to the response-prevention/no-checking than to the ritual/checking script was also observed. Higher levels of depersonalisation and anxiety in the OCD group were observed following prevention of the ritual. The patterns of response indicated obsessive–compulsive behaviour may act to prevent the level of anxiety experienced by an individual from escalating, rather than to reduce it from an already elevated level.

Wheat bran extract (WBE) is a food-grade soluble fibre preparation that is highly enriched in arabinoxylan oligosaccharides. In this placebo-controlled cross-over human intervention trial, tolerance and effects on colonic protein and carbohydrate fermentation were studied. After a 1-week run-in period, sixty-three healthy adult volunteers consumed 3, 10 and 0 g WBE/d for 3 weeks in a random order, with 2 weeks' washout between each treatment period. Fasting blood samples were collected at the end of the run-in period and at the end of each treatment period for analysis of haematological and clinical chemistry parameters. Additionally, subjects collected a stool sample for analysis of microbiota, SCFA and pH. A urine sample, collected over 48 h, was used for analysis of p-cresol and phenol content. Finally, the subjects completed questionnaires scoring occurrence frequency and distress severity of eighteen gastrointestinal symptoms. Urinary p-cresol excretion was significantly decreased after WBE consumption at 10 g/d. Faecal bifidobacteria levels were significantly increased after daily intake of 10 g WBE. Additionally, WBE intake at 10 g/d increased faecal SCFA concentrations and lowered faecal pH, indicating increased colonic fermentation of WBE into desired metabolites. At 10 g/d, WBE caused a mild increase in flatulence occurrence frequency and distress severity and a tendency for a mild decrease in constipation occurrence frequency. In conclusion, WBE is well tolerated at doses up to 10 g/d in healthy adults volunteers. Intake of 10 g WBE/d exerts beneficial effects on gut health parameters.

The Large Synoptic Survey Telescope (LSST) is an anticipated to undertake a 10–year, 3π steradian survey that promises to observe millions of new periodic variable stars. We report on a study to determine the efficiency of the LSST to recover the light curve properties of RR Lyrae stars. An LSST light curve simulation tool was used to sample input idealized light curves or RR Lyrae stars observed in SDSS Stripe 82 data, returning each as it would have been observed by LSST, including realistic photometric scatter, limiting magnitudes, and telescope downtime. Our results show that the LSST will be capable of mapping the spatial distributions and chemical compositions of halo stellar overdensities using RR Lyrae discovered across 3π steradians and out to nearly 1.5 Mpc. LSST will thus enable the mapping of halo merger streams, the discovery of new dwarf galaxies, and the mapping galactic halos throughout the Local Group galaxies.

This article takes the opportunity of Gillis Harp's recent biography of nineteenth-century American Episcopalian Phillips Brooks to engage Harp's theological situation of the Episcopal Church. Harp's revisionist historiographical argument, rejecting the Broad Church ‘myth of synthesis’ for a more agonized tale of trenchant party battles, is welcome for its perceptiveness and depth of analysis, not least as these historical difficulties remain at the centre of contemporary intra-Anglican and ecumenical conversations. Harp's commitment to a ‘Reformed’ and ‘evangelical’ Anglicanism, however, raises a series of questions – concerning the nature of orthodoxy and Christian doctrine, as well as ‘Protestant’ identity – that deserve greater investigation, and that historians and theologians would do well to pursue together.