589 research outputs found

    The formation of inflation expectations

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    Inflation (Finance)

    The "rationality" of survey-based inflation forecasts

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    Inflation (Finance) ; Forecasting

    To What End?: How We Put Your Engagement Data to Work

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    Musical Narrative and Cultural Context in the Animated Miniseries Over the Garden Wall

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    Over the Garden Wall, a television miniseries that aired in 2014 on Cartoon Network, is a distinctly American fantasy in the young adult genre. It is comprised of ten episodes, each set in a different historical period. The music of the series was written and performed by The Blasting Company and drew from a variety of historical influences, including Sacred Harp singing, ragtime, early jazz, Stephen Foster, Balkan folk music, and classic cartoons. The music serves several purposes throughout the miniseries: it helps set each episode in its respective historical period, aids in character development, and moves the narrative forward. Additionally, the consistent musical referencing of classic cartoons generates a feeling of familiarity for the teenage audience, and assists in transmitting the lessons of Over the Garden Wall. Ultimately, the miniseries contains many valuable themes for people of all ages, including the facing of mortality and the importance of family

    Employees as Volunteers

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    This infographic explains the community service leave benefit for staff and faculty at Virginia Commonwealth University

    SEDIMENT BASED TURBIDITY ANALYSES FOR REPRESENTATIVE SOUTH CAROLINA SOILS

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    Construction activities have been recognized to have significant impacts on the environment. Excess sediment from construction sites is frequently deposited into nearby surface waters, negatively altering the chemical, physical and biological properties of the water body. This environmental concern has led to strict laws concerning erosion and sediment control, such as imposing permit conditions that limit the concentration of suspended solids that can be present in effluent water from construction sites. However, sediment concentration measurements are not routinely used to detect and correct short-term problems or permit violations because laboratory analysis of sediment concentrations is time-consuming and costly. Nevertheless, timely, accurate field estimation of sediment loading could be facilitated through the development of empirical relationships between suspended solids and turbidity. Previous research indicates that turbidity measurements may be a more practical method of estimating sediment loads by indirectly relating sediment concentration to turbidity. In addition, recognition of turbidity as an indicator of pollution in surface runoff from disturbed areas has resulted in efforts by the U.S Environmental Protection Agency (EPA) to implement turbidity effluent limitation guidelines to control the discharge of pollutants from construction sites. Therefore, given the importance of a proposed turbidity limit, focus of this research is to determine relationships between representative soils and corresponding turbidity as a function of suspended sediment concentration and sediment settling. Turbidity is not only a function of suspended sediment concentration, but also of particle size, shape, and composition; so this research was needed to analyze turbidity responses based on sediment characteristics of representative South Carolina soils. First, accuracy and precision of commercially available nephelometers needed to be quantified for use in subsequent sediment/ surface water analysis and potential regulatory compliance. Analysis of accuracy and precision for instruments showed that even though meters may be very precise, they could also be inaccurate. However, three of the four meters that performed well provided statistically accurate and precise results. It was also found that formazin calibration standards may be a better standard than AMCO EPA standards for surface water analysis. Utilizing representative South Carolina soils, both relationships of turbidity to sediment concentration and turbidity to settling time were used to form mathematical correlations. Turbidity versus suspended sediment concentration and turbidity versus settling time correlated well when top soil and subsoils were classified based on their predominant South Carolina region and their measured clay content. Derived trends for suspended sediment concentration to turbidity correlated well with either a linear or log relationship (R2 values ranging from 0.7945 to 0.9846) as opposed to previous research utilizing a power function or the assumption of a one-to-one relationship. For the correlation of turbidity and sediment settling time, trends were well correlated with a power function (R2 values ranging from 0.7674 to 0.9347). This relationship suggests Stoke\u27s Law was followed; where smaller particles remain in suspension longer and contribute more to turbidity compared to soils with less clay content. Altogether, results of this research provide a step in determining potential site-specific equations relating sediment concentration to turbidity and sediment settling time to turbidity. With this knowledge, results could ultimately aid in the design of future sediment basins of South Carolina and provide information for potential regulatory compliance

    Coulomb Distortion Effects for Electron or Positron Induced (e,e′)(e,e') Reactions in the Quasielastic Region

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    In response to recent experimental studies we investigate Coulomb distortion effects on (e,e′)(e,e') reactions from medium and heavy nuclei for the case of electrons and positrons. We extend our previously reported full DWBA treatment of Coulomb distortions to the case of positrons for the 208Pb(e,e′)^{208}Pb(e,e') reaction in the quasielastic region for a particular nuclear model. In addition, we use previously reported successful approaches to treating Coulomb corrections in an approximate way to calculate the Coulomb distortion effects for (e,e′)(e,e') reactions for both electrons and positrons for the case of a simple nuclear model for quasielastic knock-out of nucleons. With these results in hand we develop a simple {\em ad-hoc} approximation for use in analyzing experiments, and discuss methods of extracting the ``longitudinal structure function" which enters into evaluation of the Coulomb sum rule. These techniques are generally valid for lepton induced reactions on nuclei with momentum transfers greater than approximately 300 MeV/cMeV/c.Comment: 18 pages, 6 figure
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