fanplot: An R Package for Visualising Sequential Distributions

Fan charts, first developed by the Bank of England in 1996, have become a standard method for visualising forecasts with uncertainty. Using shading fan charts focus the attention towards the whole distribution away from a single central measure. This article describes the basics of plotting fan charts using an R add-on package alongside some additional methods for displaying sequential distributions. Examples are based on distributions of both estimated parameters from a time series model and future values with uncertainty

Theoretical modelling of frequency dependent elastic loss in composite piezoelectric transducers

The large number of degrees of freedom in the design of piezoelectric transducers requires a theoretical model that is computationally efficient so that a large number of iterations can be performed in the design optimisation. The materials used are often lossy, and indeed loss can be used to enhance the operational characteristics of these designs. Motivated by these needs, this paper extends the one-dimensional linear systems model to incorporate frequency dependent elastic loss. The reception sensitivity, electrical impedance and electromechanical coupling coefficient of a 1-3 composite transducer, with frequency dependent loss in the polymer filler, are investigated. By plotting these operating characteristics as a function of the volume fraction of piezoelectric ceramic an optimum design is obtained. A device with a non-standard, high shear attenuation polymer is also simulated and this leads to an increase in the electromechanical coupling coefficient. A comparison with finite element simulations is then performed. This shows that the two methods are in reasonable agreement in their electrical impedance profiles in all the cases considered. The plots are almost identical away from the main resonant peak where the frequency location of the peaks are comparable but there is in some cases a 20% discrepancy in the magnitude of the peak value and in its bandwidth. The finite element model also shows that the use of a high shear attenuation polymer filler damps out the unwanted, low frequency modes whilst maintaining a reasonable impedance magnitude

The Servant of Two Masters

The playbill for Taylor University’s Spring 2014 performance of The Servant of Two Masters by Carlo Goldoni, translated by Jeffry Hatcher and Paolo Emilio Landi. The Servant of Two Masters is a comedy by the Italian playwright Carlo Goldoni written in 1746. It follows the story of Beatrice and her comical servant, Truffaldino. Beatrice goes disguised as her dead brother to find her lover, Florindo, plotting to acquire money from her brother’s betrothed to help her run away with her lover. Meanwhile Truffaldino secretly takes on an additional service to Florindo, and must do his best to serve his two masters without either one knowing he is serving the other.https://pillars.taylor.edu/playbills/1033/thumbnail.jp

Breaking Barriers 2: Plotting the Path Away From Juvenile Detention and Toward Academic Success for School-Age African American Males

A follow-up to Breaking Barriers, this report focuses on black male's overrepresentation in the juvenile justice system as a barrier to their academic success. Results from five studies reveal behaviors and conditions associated with reducing delinquency that lead to a number of policy implications

Detected

A Navy sub commander plays hide-and-seek with a Soviet sub. Articles, stories, and other compositions in this archive were written by participants in the Mighty Pen Project. The program, developed by author David L. Robbins, and in partnership with Virginia Commonwealth University and the Virginia War Memorial in Richmond, Virginia, offers veterans and their family members a customized twelve-week writing class, free of charge. The program encourages, supports, and assists participants in sharing their stories and experiences of military experience so both writer and audience may benefit