Appendix a Glossary
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Seasonal and Spatial Variations in the Attenuation of Light in the North Atlantic Ocean
JEFFREY H. SMART SEASONAL AND SPATIAL VARIATIONS IN THE ATTENUATION OF LIGHT IN THE NORTH ATLANTIC OCEAN This article examines seasonal and spatial vanatlOns in the average depth profiles of the diffuse attenuation coefficient, Kd, for visible light propagating downward from the ocean surface at wavelengths of 490 and 532 nm. Profiles of the depth of the nth attenuation length are also shown. Spring, summer, and fall data from the northwestern and north central Atlantic Ocean and winter data from the northeastern Atlantic Ocean are studied. Variations in the depth-integrated Kd profiles are important because they are related to the depth penetration achievable by an airborne active optical antisubmarine warfare system. INTRODUCTION Numerous investigators have tried to characterize the the geographic areas and seasons indicated in Table 1 and diffuse attenuation coefficient (hereafter denoted as Kd) Figure 1. Despite the incomplete spatial and temporal for various ocean areas and for the different seasons. Platt coverage across the North Atlantic Ocean, this article and Sathyendranath 1 generated numerical fits to averaged should serve as a useful resource to estimate the optical profiles from coastal and open-ocean regions, and they characteristics in the areas studied. divided the North Atlantic into provinces that extended The purpose of this article is to characterize the sea from North America to Europe and over large ranges sonal and spatial variations in diffuse attenuation at 490 in latitude (e.g. , from 10.0° to 37.00 N and from 37.0° to and 532 nm. Because Kd frequently changes with depth, 50.00 N). In addition, numerous papers have attempted profiles of depth versus number of attenuation lengths are to model chlorophyll concentrations (which are closely required to characterize the attenuation of light as it correlated with Kd ) using data on available sunlight as a propagates from the surface downward into the water function of latitude and season, nutrient concentrations, column. -
Thermodynamic Physics and the Poetry and Prose of Gerard Manley Hopkins
Georgia State University ScholarWorks @ Georgia State University English Dissertations Department of English 5-11-2015 Literatures of Stress: Thermodynamic Physics and the Poetry and Prose of Gerard Manley Hopkins Thomas Mapes Follow this and additional works at: https://scholarworks.gsu.edu/english_diss Recommended Citation Mapes, Thomas, "Literatures of Stress: Thermodynamic Physics and the Poetry and Prose of Gerard Manley Hopkins." Dissertation, Georgia State University, 2015. https://scholarworks.gsu.edu/english_diss/134 This Dissertation is brought to you for free and open access by the Department of English at ScholarWorks @ Georgia State University. It has been accepted for inclusion in English Dissertations by an authorized administrator of ScholarWorks @ Georgia State University. For more information, please contact [email protected]. LITERATURES OF STRESS: THERMODYNAMIC PHYSICS AND THE POETRY AND PROSE OF GERARD MANLEY HOPKINS by THOMAS MAPES Under the Direction of Paul Schmidt, PhD ABSTRACT This dissertation examines two of the various literatures of energy in Victorian Britain: the scientific literature of the North British school of energy physics, and the poetic and prose literature of Gerard Manley Hopkins. As an interdisciplinary effort, it is intended for several audiences. For readers interested in science history, it offers a history of two terms – stress and strain – central to modern physics. As well, in discussing the ideas of various scientific authors (primarily William John Macquorn Rankine, William Thomson, P.G. Tait, and James Clerk Maxwell), it indicates several contributions these figures made to larger culture. For readers of Hopkins’ poems and prose, this dissertation corresponds with a recent trend in criticism in its estimation of Hopkins as a scientifically informed writer, at least in his years post-Stonyhurst. -
Arxiv:1801.04898V1 [Cs.SI] 15 Jan 2018
Network assembly of scientific communities of varying size and specificity Daniel T. Citron1, ∗ and Samuel F. Way2, y 1Department of Physics, Cornell University, Ithaca, New York, 14853 USA 2Department of Computer Science, University of Colorado, Boulder CO, 80309 USA How does the collaboration network of researchers coalesce around a scientific topic? What sort of social restructuring occurs as a new field develops? Previous empirical explorations of these questions have examined the evolution of co-authorship networks associated with several fields of science, each noting a characteristic shift in network structure as fields develop. Historically, however, such studies have tended to rely on manually annotated datasets and therefore only consider a handful of disciplines, calling into question the universality of the observed structural signature. To overcome this limitation and test the robustness of this phenomenon, we use a comprehensive dataset of over 189,000 scientific articles and develop a framework for partitioning articles and their authors into coherent, semantically-related groups representing scientific fields of varying size and specificity. We then use the resulting population of fields to study the structure of evolving co-authorship networks. Consistent with earlier findings, we observe a global topological transition as the co- authorship networks coalesce from a disjointed aggregate into a dense giant connected component that dominates the network. We validate these results using a separate, complimentary corpus of scientific articles, and, overall, we find that the previously reported characteristic structural evolution of a scientific field’s associated co-authorship network is robust across a large number of scientific fields of varying size, scope, and specificity. -
Natural and Enhanced Attenuation of Soil and Ground Water At
LMS/MON/S04243 Office of Legacy Management Natural and Enhanced Attenuation of Soil and Groundwater at Monument Valley, Arizona, and Shiprock, New Mexico, DOE Legacy Waste Sites 2007 Pilot Study Status Report June 2008 U.S. Department OfficeOffice ofof LegacyLegacy ManagementManagement of Energy Work Performed Under DOE Contract No. DE–AM01–07LM00060 for the U.S. Department of Energy Office of Legacy Management. Approved for public release; distribution is unlimited. This page intentionally left blank LMS/MON/S04243 Natural and Enhanced Attenuation of Soil and Groundwater at Monument Valley, Arizona, and Shiprock, New Mexico, DOE Legacy Waste Sites 2007 Pilot Study Status Report June 2008 This page intentionally left blank Contents Acronyms and Abbreviations ....................................................................................................... vii Executive Summary....................................................................................................................... ix 1.0 Introduction......................................................................................................................1–1 2.0 Monument Valley Pilot Studies.......................................................................................2–1 2.1 Source Containment and Removal..........................................................................2–1 2.1.1 Phreatophyte Growth and Total Nitrogen...................................................2–1 2.1.2 Causes and Recourses for Stunted Plant Growth........................................2–5 -
Rare Astronomical Sights and Sounds
Jonathan Powell Rare Astronomical Sights and Sounds The Patrick Moore The Patrick Moore Practical Astronomy Series More information about this series at http://www.springer.com/series/3192 Rare Astronomical Sights and Sounds Jonathan Powell Jonathan Powell Ebbw Vale, United Kingdom ISSN 1431-9756 ISSN 2197-6562 (electronic) The Patrick Moore Practical Astronomy Series ISBN 978-3-319-97700-3 ISBN 978-3-319-97701-0 (eBook) https://doi.org/10.1007/978-3-319-97701-0 Library of Congress Control Number: 2018953700 © Springer Nature Switzerland AG 2018 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors, and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. -
Photon Cross Sections, Attenuation Coefficients, and Energy Absorption Coefficients from 10 Kev to 100 Gev*
1 of Stanaaros National Bureau Mmin. Bids- r'' Library. Ml gEP 2 5 1969 NSRDS-NBS 29 . A111D1 ^67174 tioton Cross Sections, i NBS Attenuation Coefficients, and & TECH RTC. 1 NATL INST OF STANDARDS _nergy Absorption Coefficients From 10 keV to 100 GeV U.S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS T X J ". j NATIONAL BUREAU OF STANDARDS 1 The National Bureau of Standards was established by an act of Congress March 3, 1901. Today, in addition to serving as the Nation’s central measurement laboratory, the Bureau is a principal focal point in the Federal Government for assuring maximum application of the physical and engineering sciences to the advancement of technology in industry and commerce. To this end the Bureau conducts research and provides central national services in four broad program areas. These are: (1) basic measurements and standards, (2) materials measurements and standards, (3) technological measurements and standards, and (4) transfer of technology. The Bureau comprises the Institute for Basic Standards, the Institute for Materials Research, the Institute for Applied Technology, the Center for Radiation Research, the Center for Computer Sciences and Technology, and the Office for Information Programs. THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates that system with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation’s scientific community, industry, and com- merce. The Institute consists of an Office of Measurement Services and the following technical divisions: Applied Mathematics—Electricity—Metrology—Mechanics—Heat—Atomic and Molec- ular Physics—Radio Physics -—Radio Engineering -—Time and Frequency -—Astro- physics -—Cryogenics. -
Atmosphere Observation by the Method of LED Sun Photometry
Atmosphere Observation by the Method of LED Sun Photometry A Senior Project presented to the Faculty of the Physics Department California Polytechnic State University, San Luis Obispo In Partial Fulfillment of the Requirements of the Degree Bachelor of Science by Gregory Garza April 2013 1 Introduction The focus of this project is centered on the subject of sun photometry. The goal of the experiment was to use a simple self constructed sun photometer to observe how attenuation coefficients change over longer periods of time as well as the determination of the solar extraterrestrial constants for particular wavelengths of light. This was achieved by measuring changes in sun radiance at a particular location for a few hours a day and then use of the Langley extrapolation method on the resulting sun radiance data set. Sun photometry itself is generally involved in the practice of measuring atmospheric aerosols and water vapor. Roughly a century ago, the Smithsonian Institutes Astrophysical Observatory developed a method of measuring solar radiance using spectrometers; however, these were not usable in a simple hand-held setting. In the 1950’s Frederick Volz developed the first hand-held sun photometer, which he improved until coming to the use of silicon photodiodes to produce a photocurrent. These early stages of the development of sun photometry began with the use of silicon photodiodes in conjunction with light filters to measure particular wavelengths of sunlight. However, this method of sun photometry came with cost issues as well as unreliability resulting from degradation and wear on photodiodes. A more cost effective method was devised by amateur scientist Forrest Mims in 1989 that incorporated the use of light emitting diodes, or LEDs, that are responsive only to the light wavelength that they emit. -
Lunar and Planetary Science XXXII (2001) 1074.Pdf
Lunar and Planetary Science XXXII (2001) 1074.pdf VOYAGER IMAGES REVISITED: NEW VIEWS OF THE SATELLITES OF SATURN AND URANUS. P. J. Stooke1, 1Department of Geography, University of Western Ontario, London, Ontario, Canada N6A 5C2; [email protected]; www.uwo.ca/geog/faculty/stooke.htm Introduction: Voyager images of Saturn and its near the sub-Uranus point. At top near the planetshine moons are 20 years old, and images of the Uranian sys- terminator, the sinuous graben complex Kachina Chas- tem are 15 years old. Although much was learned from mata extends far into the northern hemisphere, possibly them, more may still be done using recent image proc- to the far limb. Additional details may be revealed by essing methods. Here I present results of a program of better noise removal. Unfortunately, few other Uranus reprocessing of images of the icy satellites of these two satellite images show useful details in planetshine. planets. Highlights include the identification of fea- Either the satellite is too far from the planet, and so tures illuminated by planetshine on the northern hemi- more weakly illuminated, or the ‘dark’ side is seen only sphere of Ariel, enigmatic markings on Enceladus and very obliquely in low phase angle views. the identification of new features on Rhea and Umbriel. This program will result in new maps of the Saturnian satellites in time for Cassini’s arrival. Images and Processing: This study makes use of all available images from the PDS Ring Node archive. An interesting observation, which this program will rectify, is that the USGS maps of all these satellites do not make full use of the image sets. -
Radio Astronomy
Edition of 2013 HANDBOOK ON RADIO ASTRONOMY International Telecommunication Union Sales and Marketing Division Place des Nations *38650* CH-1211 Geneva 20 Switzerland Fax: +41 22 730 5194 Printed in Switzerland Tel.: +41 22 730 6141 Geneva, 2013 E-mail: [email protected] ISBN: 978-92-61-14481-4 Edition of 2013 Web: www.itu.int/publications Photo credit: ATCA David Smyth HANDBOOK ON RADIO ASTRONOMY Radiocommunication Bureau Handbook on Radio Astronomy Third Edition EDITION OF 2013 RADIOCOMMUNICATION BUREAU Cover photo: Six identical 22-m antennas make up CSIRO's Australia Telescope Compact Array, an earth-rotation synthesis telescope located at the Paul Wild Observatory. Credit: David Smyth. ITU 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. - iii - Introduction to the third edition by the Chairman of ITU-R Working Party 7D (Radio Astronomy) It is an honour and privilege to present the third edition of the Handbook – Radio Astronomy, and I do so with great pleasure. The Handbook is not intended as a source book on radio astronomy, but is concerned principally with those aspects of radio astronomy that are relevant to frequency coordination, that is, the management of radio spectrum usage in order to minimize interference between radiocommunication services. Radio astronomy does not involve the transmission of radiowaves in the frequency bands allocated for its operation, and cannot cause harmful interference to other services. On the other hand, the received cosmic signals are usually extremely weak, and transmissions of other services can interfere with such signals. -
Lunar Exploration Efforts
Module 3 – Nautical Science Unit 4 – Astronomy Chapter 13 - The Moon Section 1 – The Moon What You Will Learn to Do Demonstrate understanding of astronomy and how it pertains to our solar system and its related bodies: Moon, Sun, stars and planets Objectives 1. Recognize basic facts about the Moon such as size, distance from Earth and atmosphere 2. Describe the geographical structure of the Moon 3. Describe the surface features of the Moon 4. Explain those theories that describe Moon craters and their formations Objectives 5. Describe the mountain ranges and riles on the surface of the Moon 6. Explain the effect moonquakes have on the Moon 7. Describe how the Moon’s motion causes its phases 8. Explain the basic reasons for Moon exploration Key Terms CPS Key Term Questions 1 - 12 Key Terms Maria - Mare or Maria (plural); Any of the several dark plains on the Moon and Mars; Latin word for “Sea” Reflectance - The ratio of the intensity of reflected radiation to that of the radiation that initially hits the surface. Key Terms Impact Crater - The cup shaped depression or cavity on the surface of the Earth or other heavenly bodies. Breccia - Rock composed of angular fragments of older rocks melded together as a result of a meteor impact. Regolith - The layer of disintegrated rock fragments (dust), just above the solid rock of the Moon’s crust. Key Terms Rilles - Cracks in the lunar surface similar to shallow, meandering river beds on the Earth. Phases The Moon’s motion in its orbit (of the Moon) - causes its phases (progressive changes in the visible portion of the Moon). -
Observing Photons in Space
—1— Observing photons in space For the truth of the conclusions of physical science, observation is the supreme court of appeals Sir Arthur Eddington Martin C.E. HuberI, Anuschka PauluhnI and J. Gethyn TimothyII Abstract This first chapter of the book ‘Observing Photons in Space’ serves to illustrate the rewards of observing photons in space, to state our aims, and to introduce the structure and the conventions used. The title of the book reflects the history of space astronomy: it started at the high-energy end of the electromagnetic spectrum, where the photon aspect of the radiation dominates. Nevertheless, both the wave and the photon aspects of this radiation will be considered extensively. In this first chapter we describe the arduous efforts that were needed before observations from pointed, stable platforms, lifted by rocket above the Earth’s atmosphere, became the matter of course they seem to be today. This exemplifies the direct link between technical effort — including proper design, construction, testing and calibration — and some of the early fundamental insights gained from space observations. We further report in some detail the pioneering work of the early space astronomers, who started with the study of γ- and X-rays as well as ultraviolet photons. We also show how efforts to observe from space platforms in the visible, infrared, sub-millimetre and microwave domains developed and led to today’s emphasis on observations at long wavelengths. The aims of this book This book conveys methods and techniques for observing photons1 in space. ‘Observing’ photons implies not only detecting them, but also determining their direction at arrival, their energy, their rate of arrival, and their polarisation. -
Electrons, Phonons, Magnons
<. Electrons 4x he ee eye pee we (2), f TA r eae i Sem Pies E 2a Ne Be E c=3x i0 emmfateh E e Ara 2 ; Publishers Moscow M. WU. Karanon JUeEKTPOHbI. WPonoHbt. Marnornbi Usnatenpetso «Hayka» MockBa M. I. Kaganov Electrons Phonons Magnons Translated from the Russian by V. I. Kissin Mir Publishers Moscow First published 1984 Revised from the 1979 Russian edition Ha aneauticnom asare © PuapHan pefakuua u3suKo-MaTemaTtu4ecKon JMTepaTypbl U3sfaterbeTBa «HayKay, 1979 © English translation, Mir Publishers, 1984 Contents Instead of an Introduction: Languages of Science Chapter 14. On Physics in General and Quantum Mechanics in Partic- ular 13 Introduction to the Next Five Chapters: Solid State Physics 92 Chapter 2. Phonons 109 Chapter 3. Two Statistics 146 Chapter 4. Electrons 168 Chapter 5. Electrons and Phonons 190 Chapter 6. Magnons 222 Concluding Remarks 209 So long, the stone! Long live, the wave! D. Samoilov Lndtead of an Introduction Languages of Science When science perceives the surrounding world and transforms “things in themselves into things for us’, when it masters new fields and turns its achievements into everyday tools of human- ity, it also fulfills one additional function. Namely, it composes a picture of the world which is modified by each subsequent generation and serves as one of the most important character- istics of civilization. The picture of the world, that is, the sum total of humanity’s information about nature, is stored in hundreds of volumes of special monographs and in tens of thousands of articles in scientific journals. Strictly speaking, this picture is known to humanity as a whole but not to any single per- son.