Industrial laser welding: An evaluation

Report describes 10-kW laser welding system, designed to weld large structures made from 1/4-inch and 1/2-inch aluminum (2219) and D6AC steel

Experiments with Magnetohydrodynamically Supported Shock Layers

Shock tube experiments to determine interaction of hypersonic flow with magnetic fiel

Counting What Is Measured or Measuring What Counts? League Tables and Their Impact On Higher Education Institutions in England

This report investigates league tables and their impact on higher education institutions (HEIs) in England. It presents findings from two strands of research: – an analysis of five league tables selected for the study, their methodologies and the underlying data employed, and – an investigation of how higher education institutions respond to league tables generally and the extent to which they influence institutional decision-making and actions. The purpose of the research is to stimulate informed debate about the approaches and limitations of the various league tables, and greater understanding among the users and stakeholders of the implications of making decisions based on these sources of information

Underwater glider observations and the representation of western boundary currents in numerical models

Author Posting. © The Oceanography Society, 2017. This article is posted here by permission of The Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 30, no. 2 (2017): 88–89, doi:10.5670/oceanog.2017.225.Western boundary currents are important oceanic components of Earth’s climate system. In the subtropics, the Gulf Stream, Kuroshio, East Australian Current, Agulhas Current, and Brazil Current contribute to poleward heat transport. Low-latitude western boundary currents, such as the Somali Current, Mindanao Current, and New Guinea Coastal Undercurrent, are key connections between the subtropical gyres and equatorial current systems. Western boundary currents are generally narrow (O(100) km wide) with strong currents (O(1) m s–1) and large property gradients, making them a challenge to both observe and simulate.Funding for Spray glider operations in the Gulf Stream has been provided by the National Science Foundation (OCE-0220769,OCE-1633911), the Office of Naval Research (N000141713040), the National Oceanic and Atmospheric Administration’s Climate Observation Division (NA14OAR4320158), Eastman Chemical Company, Woods Hole Oceanographic Institution’s Oceans and Climate Change Institute, and the W. Van Alan Clark Jr. Chair for Excellence in Oceanography at WHOI (awarded to Breck Owens)

Toward a Just Model of Pretrial Release: A History of Bail Reform and a Prescription for What\u27s Next

The criminal justice system is in the midst of the “third wave” of bail reform in the United States. The current movement aims to end the ingrained practices of wealth-based discrimination in pretrial administration. The authors—civil rights attorneys who have litigated the issue of cash bond in Cook County, Illinois—have been on the front lines of this policy shift. From this vantage, we conduct a historical analysis of modern-day bail reform efforts in the “first” and “second” waves of bail reform, and examine the impact of these reforms on incarceration rates and racial disparities in the justice system. We explain how these earlier efforts both influenced and created the conditions for the third wave reforms that are now underway, including a “groundswell” of class action litigation that seeks to minimize pretrial detention by breathing new life into longstanding principles of equal protection and due process. We then analyze the impact of these third wave reforms nationwide, while using Cook County as a case study. The results suggest reason for both optimism and caution, particularly in jurisdictions where advocates have been willing to trade a more expansive scheme of preventive detention for the elimination of the cash bail system. We conclude with observations in support of a just system of pretrial release—one that relies neither on money bond nor on preventive detention measures. This system is one in which the vast majority of the presumptively innocent people charged with offenses are immediately released back into their communities. It is a system in which courts provide services rather than onerous conditions, to minimize failures to appear in court, mitigate recidivism, and ensure that communities are not decimated by unconstitutional pretrial detention. While this model is not without some societal risk, we contend it is the only tolerable outcome under our constitutional system

Improved test of Lorentz Invariance in Electrodynamics using Rotating Cryogenic Sapphire Oscillators

We present new results from our test of Lorentz invariance, which compares two orthogonal cryogenic sapphire microwave oscillators rotating in the lab. We have now acquired over 1 year of data, allowing us to avoid the short data set approximation (less than 1 year) that assumes no cancelation occurs between the $\tilde{\kappa}_{e-}$ and $\tilde{\kappa}_{o+}$ parameters from the photon sector of the standard model extension. Thus, we are able to place independent limits on all eight $\tilde{\kappa}_{e-}$ and $\tilde{\kappa}_{o+}$ parameters. Our results represents up to a factor of 10 improvement over previous non rotating measurements (which independently constrained 7 parameters), and is a slight improvement (except for $\tilde{\kappa}_{e-}^{ZZ}$) over results from previous rotating experiments that assumed the short data set approximation. Also, an analysis in the Robertson-Mansouri-Sexl framework allows us to place a new limit on the isotropy parameter $P_{MM}=\delta-\beta+{1/2}$ of $9.4(8.1)\times10^{-11}$, an improvement of a factor of 2.Comment: Accepted for publication in Phys. Rev.

Tradition and Prudence in Locke's Exceptions to Toleration

Why did Locke exclude Catholics and atheists from toleration? Not, I contend, because he was trapped by his context, but because his prudential approach and practica ljudgments led him to traditiona ltexts. I make this argumentfirst by outlining the connections among prudential exceptionality, practical judgments, and traditional texts. I then describe important continuities betweenc onventional English understandings of the relationship between state and religion and Locke's writings on toleration, discuss Locke's conception of rights, and illustrate his use of prudential exceptions and distinctions. I conclude by arguing that Locke's problems are relevant to assessingc ontemporary liberal discussions of tolerationa nd the separation of state and religion that lean heavily on practical justification

Influence of Adhesion at Steel/Mortar Interface on Corrosion Characteristics of Reinforcing Steel

The mechanism of corrosion of reinforcing steel in concrete is discussed based on electrochemical and electron microscopy observations. The importance of calcium hydroxide precipitation on the steel surf ace in the steel/mortar interface is evaluated by placing filter paper around reinforcing steel bar specimens prior to casting in mortar, thus preventing direct contact between steel and mortar. The voids created presumably prevent calcium hydroxide crystals from forming on the steel surface. Specimens with filter paper are compared to specimens with good steel/mortar adhesion using rapid macrocell and corrosion potential tests and a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS). The study included 21 macrocell and 16 corrosion potential tests run for periods of 25 to 89 days. Seven specimens were subjected to SEM/EDS analysis. Electrochemical results are mixed due to the influence of crevice corrosion. but it is generally shown that better protection is provided for steel with good steel/mortar adhesion than with filter paper. The filter paper, indeed, prevents calcium hydroxide crystals from forming on the steel surface. Corrosion products on active specimens with good mortar cover are shown to grow preferentially in voids created by air bubbles trapped in the mortar. The protective mechanism of calcium hydroxide crystals is proposed to be due to pH buffering by the hydroxyl ions released when the crystals are dissolved, a fact that cannot be proven easily, since many other factors may contribute to the protection of steel in concrete. This report is based on research by Henrik J. Axelsson in partial fulfillment of the requirements of the M.Sc. degree in Engineering Physics at Chalmers University of Technology, Gothenburg. Sweden. The research was sponsored by the Department of Civil and Envirorunental Engineering at the University of Kansas and by Structural Metals, Inc