8,452 research outputs found
Letter from Franklin K. Lane, Secretary of the Interior, to Representative Hayden
No full textLetter from Franklin K. Lane to Carl T. Hayden expressing his support for bill S.390 in establishing the Grand Canyon as a National Park
The K-T Extinction
No full textThis chapter from the book History of Life describes the results of the K-T extinction and looks at the Impact theory and a giant volcanic eruption as possible causes. The essay covers the catastrophic scenarios for extinction that could result from these events. After reviewing the paleontological record across the K-T boundary, the author concludes that it is not clear that the catastrophes themselves can explain the extinction patterns that we see in the fossil record. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division
GEMAS: prediction of solid-solution phase partitioning coefficients (Kd) for oxoanions and boric acid in soils using mid-infrared diffuse reflectance spectroscopy
No full textAbstract not availableLeslie J. Janik, Sean T. Forrester, José M. Soriano-Disla, Jason K. Kirby, Michael J. McLaughlin, Clemens Reimann and The GEMAS Project Tea
Is lead uptake through the immature intestine related to the number of free Pb2+ cations in acidic solution?
No full textExtended abstract.Linda M Heath, Kathleen L Soole, Michael J McLaughlin, Gordon T McEwan, John W Edward
Multi-Attribute SCADA-Specific Intrusion Detection System for Power Networks
No full textThe increased interconnectivity and complexity of supervisory control and data acquisition (SCADA) systems in power system networks has exposed the systems to a multitude of potential vulnerabilities. In this paper, we present a novel approach for a next-generation SCADA-specific intrusion detection system (IDS). The proposed system analyzes multiple attributes in order to provide a comprehensive solution that is able to mitigate varied cyber-attack threats. The multiattribute IDS comprises a heterogeneous white list and behavior-based concept in order to make SCADA cybersystems more secure. This paper also proposes a multilayer cyber-security framework based on IDS for protecting SCADA cybersecurity in smart grids without compromising the availability of normal data. In addition, this paper presents a SCADA-specific cybersecurity testbed to investigate simulated attacks, which has been used in this paper to validate the proposed approach
GEMAS: prediction of solid-solution partitioning coefficients (Kd ) for cationic metals in soils using mid-infrared diffuse reflectance spectroscopy.
No full textAbstract not availableLeslie J. Janik, Sean T. Forrester, José M. Soriano-Disla, Jason K. Kirby, Michael J. McLaughlin, Clemens Reimann and the GEMAS Project Tea
Local curvature-dimension condition implies measure-contraction property
No full textAbstractWe prove that for non-branching metric measure spaces the local curvature condition CDloc(K,N) implies the global version of MCP(K,N). The curvature condition CD(K,N) introduced by the second author and also studied by Lott and Villani is the generalization to metric measure space of lower bounds on Ricci curvature together with upper bounds on the dimension. This paper is the following step of Bacher and Sturm (2010) [1] where it is shown that CDloc(K,N) is equivalent to a global condition CD⁎(K,N), slightly weaker than the usual CD(K,N). It is worth pointing out that our result implies sharp Bishop–Gromov volume growth inequality and sharp Poincaré inequality
Zodiacal exoplanets in time – X. The orbit and atmosphere of the young ‘neptune desert’-dwelling planet K2-100b
No full textWe obtained high-resolution infrared spectroscopy and short-cadence photometry of the 600–800 Myr Praesepe star K2-100 during transits of its 1.67-d planet. This Neptune-size object, discovered by the NASA K2 mission, is an interloper in the ‘desert’ of planets with similar radii on short-period orbits. Our observations can be used to understand its origin and evolution by constraining the orbital eccentricity by transit fitting, measuring the spin-orbit obliquity by the Rossiter–McLaughlin effect, and detecting any extended, escaping the hydrogen–helium envelope with the 10 830 -Å line of neutral helium in the 2s3S triplet state. Transit photometry with 1-min cadence was obtained by the K2 satellite during Campaign 18 and transit spectra were obtained with the IRD spectrograph on the Subaru telescope. While the elevated activity of K2-100 prevented us from detecting the Rossiter–McLaughlin effect, the new photometry combined with revised stellar parameters allowed us to constrain the eccentricity to e < 0.15/0.28 with 90/99 per cent confidence. We modelled atmospheric escape as an isothermal, spherically symmetric Parker wind, with photochemistry driven by ultraviolet radiation, which we estimate by combining the observed spectrum of the active Sun with calibrations from observations of K2-100 and similar young stars in the nearby Hyades cluster. Our non-detection (<5.7 m Å) of a transit-associated He I line limits mass-loss of a solar-composition atmosphere through a T ≤ 10000 K wind to <0.3 M Gyr−1. Either K2-100b is an exceptional desert-dwelling planet, or its mass-loss is occurring at a lower rate over a longer interval, consistent with a core accretion-powered scenario for escape
sj-docx-1-jbr-10.1177_07487304231179595 – Supplemental material for The Associations of Chronotype and Shift Work With Rheumatoid Arthritis
No full textSupplemental material, sj-docx-1-jbr-10.1177_07487304231179595 for The Associations of Chronotype and Shift Work With Rheumatoid Arthritis by Thomas Butler, J Robert Maidstone, K Martin Rutter, T John McLaughlin, W David Ray and E Julie Gibbs in Journal of Biological Rhythms</p
Structural determination of metallofullerene SC3C82 revisited: A surprising finding
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