Direct analysis of hydrogen/deuterium mixtures: A concept

Fraction of deuterium/hydrogen mixture is isolated by column chromatography, ionized, and the HD+1-0 band absorption measured with conventional high-resolution infrared spectrophotometer

Annotated List of Junior and Senior High School Books by Mississippi Authors

https://egrove.olemiss.edu/ms_educ/1076/thumbnail.jp

Letter to Sonora Dodd from Robert H. Lord, June 20, 1911

Letter to Sonora Dodd from Robert H. Lord, with envelope and business card. Robert Lord was The Shop-Keeper of Lord\u27s Little Shop, Springfield, Illinois.https://digitalcommons.whitworth.edu/fathers-day-correspondence/1002/thumbnail.jp

The Role of Subsurface Flows in Solar Surface Convection: Modeling the Spectrum of Supergranular and Larger Scale Flows

We model the solar horizontal velocity power spectrum at scales larger than granulation using a two-component approximation to the mass continuity equation. The model takes four times the density scale height as the integral (driving) scale of the vertical motions at each depth. Scales larger than this decay with height from the deeper layers. Those smaller are assumed to follow a Kolomogorov turbulent cascade, with the total power in the vertical convective motions matching that required to transport the solar luminosity in a mixing length formulation. These model components are validated using large scale radiative hydrodynamic simulations. We reach two primary conclusions: 1. The model predicts significantly more power at low wavenumbers than is observed in the solar photospheric horizontal velocity spectrum. 2. Ionization plays a minor role in shaping the observed solar velocity spectrum by reducing convective amplitudes in the regions of partial helium ionization. The excess low wavenumber power is also seen in the fully nonlinear three-dimensional radiative hydrodynamic simulations employing a realistic equation of state. This adds to other recent evidence suggesting that the amplitudes of large scale convective motions in the Sun are significantly lower than expected. Employing the same feature tracking algorithm used with observational data on the simulation output, we show that the observed low wavenumber power can be reproduced in hydrodynamic models if the amplitudes of large scale modes in the deep layers are artificially reduced. Since the large scale modes have reduced amplitudes, modes on the scale of supergranulation and smaller remain important to convective heat flux even in the deep layers, suggesting that small scale convective correlations are maintained through the bulk of the solar convection zone.Comment: 36 pages, 6 figure

A hybrid finite element approach to modeling sound radiation from circular and rectangular ducts

This is the post-print version of the Article - Copyright @ 2012 Acoustical Society of AmericaA numerical model based on a hybrid finite element method is developed that seeks to join sound pressure fields in interior and exterior regions. The hybrid method is applied to the analysis of sound radiation from open pipes, or ducts, and uses mode matching to couple a finite element discretization of the region surrounding the open end of the duct to wave based modal expansions for adjoining interior and exterior regions. The hybrid method facilitates the analysis of ducts of arbitrary but uniform cross section as well the study of conical flanges and here a modal expansion based on spherical harmonics is applied. Predictions are benchmarked against analytic solutions for the limiting cases of flanged and unflanged circular ducts and excellent agreement between the two methods is observed. Predictions are also presented for flanged and unflanged rectangular ducts, and because the hybrid method retains the sparse banded and symmetric matrices of the traditional finite element method, it is shown that predictions can be obtained within an acceptable time frame even for a three dimensional problem.This study is supported by the U.K. Engineering and Physical Sciences Research Council (EPSRC)

Mathematical and numerical evaluation of the damping behaviour for a multi-strand bar

Multi-strand systems include, but are not limited to, electrical wire conductors, structural cables, and some composite reinforcements. These systems (apart from composite reinforcements) are generally metallic for a variety of reasons. One often overlooked advantage is that dry friction between metal contacts can provide damping over significantly wider temperature ranges than is typical for common damping materials such as viscoelastic polymers. This paper, proposes a mathematical model that describes the hysteretic vibrational behaviour of a frictionally constrained multi-strand bar constructed from strands that have a circular cross-section. The mathematical model analytically predicts the frictional system stiffness under simply supported boundary conditions. The assembled strands are numerically simulated using finite elements and hysteresis behaviour is compared to that obtained from the mathematical model. This shows that the mathematical model is capable of predicting the stiffness and the force-displacement hysteresis response of the system for a variety of conditions

Consumer Purchases of Biotech Sweet Corn: Results from a Market Experiment

In the increasingly consumer-driven food system, consumer preferences toward agricultural biotechnology have the potential to influence decisions about development and adoption of biotech crop varieties. Current knowledge about consumer attitudes toward biotech foods is largely based on a number of consumer surveys and a growing body of experimental auctions. This paper reports results of a market experiment designed to isolate the effect of the use of biotechnology on consumer choices between two otherwise identical products. Two related varieties of fresh-market sweet corn were grown, labeled, and sold side-by-side in nine participating grocery stores in the Philadelphia area. Sales data indicate a market share of biotech corn of about 45 percent, with store-specific shares varying between 10 and 80 percent. Over 700 surveys were collected in stores. Surprisingly, only 65 percent of respondents noticed that there were two types of corn for sale despite the labeling and merchandising, and 87 percent of the sample spent one minute or less choosing their corn. About half of the respondents had heard of biotechnology before, and 16 percent volunteered the biotechnology trait as an influence on their purchase decision. Approximately 40 percent of the sample purchased some of the biotech variety, with several respondents purchasing some of each.Institutional and Behavioral Economics,

Keynote Address to the Atlas Conference: “International Business Disputes In An Era Of Receding Globalism”

This is a transcript of the luncheon keynote address by Lord Peter Goldsmith at the Sixth Annual Conference of the Atlanta International Arbitration Society (AtlAS) on October 23, 2017. Lord Peter Goldsmith QC, PC, is London Co-Managing Partner and Chair of European and Asian Litigation at Debevoise & Plimpton LLP. He joined the firm after serving as the UK’s Attorney General from 2001-2007, prior to which he was in private practice as one of the leading barristers in London. Lord Goldsmith has a long practice in arbitration and in the interface between arbitration and litigation. He appears as counsel for leading cases in a number of jurisdictions and different arbitral institutions, including LCIA, ICC and SIAC and in ad hoc arbitrations. He is closely connected with the LCIA, ICC (for whom he co-chaired the task force on Arbitration for States and State entities), the HKIAC (of which he is Vice chairman), and SIAC. He also has been appointed or confirmed as arbitrator by LCIA, SIAC and the ICC, and is included in the international arbitration database of the Arbitration Center at the Institute of Modern Arbitration, Moscow. Lord Goldsmith also co-chaired a Task Force on ICC arbitration involving States and State entities, which recommended changes to the ICC rules of arbitration to take account of special issues faced by States in ICC arbitrations. Lord Goldsmith has appeared in numerous cases in the House of Lords, the Privy Council and the Court of Appeal, as well as international and European courts and in the courts of a number of other jurisdictions. Consistently acknowledged for his prominence, The American Lawyer states that “[he has] the advocacy skills of one of the finest barristers of his generation.” He is recommended as a leading lawyer in Chambers UK and Chambers Global for International Arbitration, Public International Law and Corporate Crime and Investigations. The guides have described him as “exceptionally accomplished,” “breathtakingly persuasive” and “one of the great doyens of the English bar.” Lord Goldsmith has a strong history and life-long support for pro bono assistance to bring legal expertise to the disadvantaged. As a young lawyer, he started a legal advice center in the East End of London and, later in his career, founded the Bar of England and Wales’ Pro Bono Unit, a nationwide charity providing the free legal services of thousands of barristers (of which he remains President), the Attorney General’s pro bono coordinating committees (which coordinates pro bono activity in England and Wales), and became first chair of the Access to Justice Foundation, a cross-profession initiative which raises money to support pro bono organisations across the country and is by statute the sole recipient of pro bono costs award (a role in which he continues). Lord Goldsmith was a graduate in law from Cambridge University with double first class honours and a Master’s from University College London. He was admitted to the Bar of England and Wales in 1972, Paris in 1997, Belize in 2010, St. Kitts and Nevis in 2010, New South Wales in 2010 and the British Virgin Islands in 2011. He is also a Registered Foreign Lawyer at the Singapore International Commercial Court