2020 Volume 16 Issue 2
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Glossary Glossary
Glossary Glossary Albedo A measure of an object’s reflectivity. A pure white reflecting surface has an albedo of 1.0 (100%). A pitch-black, nonreflecting surface has an albedo of 0.0. The Moon is a fairly dark object with a combined albedo of 0.07 (reflecting 7% of the sunlight that falls upon it). The albedo range of the lunar maria is between 0.05 and 0.08. The brighter highlands have an albedo range from 0.09 to 0.15. Anorthosite Rocks rich in the mineral feldspar, making up much of the Moon’s bright highland regions. Aperture The diameter of a telescope’s objective lens or primary mirror. Apogee The point in the Moon’s orbit where it is furthest from the Earth. At apogee, the Moon can reach a maximum distance of 406,700 km from the Earth. Apollo The manned lunar program of the United States. Between July 1969 and December 1972, six Apollo missions landed on the Moon, allowing a total of 12 astronauts to explore its surface. Asteroid A minor planet. A large solid body of rock in orbit around the Sun. Banded crater A crater that displays dusky linear tracts on its inner walls and/or floor. 250 Basalt A dark, fine-grained volcanic rock, low in silicon, with a low viscosity. Basaltic material fills many of the Moon’s major basins, especially on the near side. Glossary Basin A very large circular impact structure (usually comprising multiple concentric rings) that usually displays some degree of flooding with lava. The largest and most conspicuous lava- flooded basins on the Moon are found on the near side, and most are filled to their outer edges with mare basalts. -
Human Spatial Orientation Perceptions During Simulated Lunar Landing
Human Spatial Orientation Perceptions during Simulated Lunar Landing By Torin Kristofer Clark B.S. Aerospace Engineering University of Colorado at Boulder, 2008 SUBMITTED TO THE DEPARTMENT OF AERONAUTICS AND ASTRONAUTICS IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN AERONAUTICS AND ASTRONAUTICS AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY June 2010 © 2010 Massachusetts Institute of Technology All rights reserved Signature of Author: ____________________________________________________________ Torin K. Clark Department of Aeronautics and Astronautics May 21, 2010 Certified by: ___________________________________________________________________ Laurence R. Young Apollo Program Professor of Astronautics Professor of Health Sciences and Technology Thesis Supervisor Certified by: ___________________________________________________________________ Kevin R. Duda Senior Member, Technical Staff, Draper Laboratory Thesis Supervisor Accepted by: __________________________________________________________________ Eytan H. Modiano Associate Professor of Aeronautics and Astronautics Chair, Committee on Graduate Students 1 ABSTRACT During crewed lunar landings, astronauts are expected to guide a stable and controlled descent to a landing zone that is level and free of hazards by either making landing point (LP) redesignations or taking direct manual control. However, vestibular and visual sensorimotor limitations unique to lunar landing may interfere with landing performance and safety. Vehicle motion profiles of candidate -
University of Cincinnati
UNIVERSITY OF CINCINNATI Date:__7/30/07_________________ I, __ MUNISH GUPTA_____________________________________, hereby submit this work as part of the requirements for the degree of: DOCTORATE OF PHILOSOPHY (Ph.D) in: MATERIALS SCIENCE AND ENGINEERING It is entitled: LOW-PRESSURE AND ATMOSPHERIC PRESSURE PLASMA POLYMERIZED SILICA-LIKE FILMS AS PRIMERS FOR ADHESIVE BONDING OF ALUMINUM This work and its defense approved by: Chair: __Dr. F. JAMES BOERIO ___ ______ __Dr. GREGORY BEAUCAGE __ ___ __ __Dr. RODNEY ROSEMAN _____ ___ __Dr. JUDE IROH _ _____________ _______________________________ LOW-PRESSURE AND ATMOSPHERIC PRESSURE PLASMA POLYMERIZED SILICA-LIKE FILMS AS PRIMERS FOR ADHESIVE BONDING OF ALUMINUM A dissertation submitted to the Division of Research and Advanced Studies of the University of Cincinnati in partial fulfillment of the requirements for the degree of DOCTORATE OF PHILOSOPHY (Ph.D) in the Department of Chemical and Material Engineering of the College of Engineering 2007 by Munish Gupta M.S., University of Cincinnati, 2005 B.E., Punjab Technical University, India, 2000 Committee Chair: Dr. F. James Boerio i ABSTRACT Plasma processes, including plasma etching and plasma polymerization, were investigated for the pretreatment of aluminum prior to structural adhesive bonding. Since native oxides of aluminum are unstable in the presence of moisture at elevated temperature, surface engineering processes must usually be applied to aluminum prior to adhesive bonding to produce oxides that are stable. Plasma processes are attractive for surface engineering since they take place in the gas phase and do not produce effluents that are difficult to dispose off. Reactive species that are generated in plasmas have relatively short lifetimes and form inert products. -
Simply-Riemann-1588263529. Print
Simply Riemann Simply Riemann JEREMY GRAY SIMPLY CHARLY NEW YORK Copyright © 2020 by Jeremy Gray Cover Illustration by José Ramos Cover Design by Scarlett Rugers All rights reserved. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by copyright law. For permission requests, write to the publisher at the address below. [email protected] ISBN: 978-1-943657-21-6 Brought to you by http://simplycharly.com Contents Praise for Simply Riemann vii Other Great Lives x Series Editor's Foreword xi Preface xii Introduction 1 1. Riemann's life and times 7 2. Geometry 41 3. Complex functions 64 4. Primes and the zeta function 87 5. Minimal surfaces 97 6. Real functions 108 7. And another thing . 124 8. Riemann's Legacy 126 References 143 Suggested Reading 150 About the Author 152 A Word from the Publisher 153 Praise for Simply Riemann “Jeremy Gray is one of the world’s leading historians of mathematics, and an accomplished author of popular science. In Simply Riemann he combines both talents to give us clear and accessible insights into the astonishing discoveries of Bernhard Riemann—a brilliant but enigmatic mathematician who laid the foundations for several major areas of today’s mathematics, and for Albert Einstein’s General Theory of Relativity.Readable, organized—and simple. Highly recommended.” —Ian Stewart, Emeritus Professor of Mathematics at Warwick University and author of Significant Figures “Very few mathematicians have exercised an influence on the later development of their science comparable to Riemann’s whose work reshaped whole fields and created new ones. -
THE STUDY of SATURN's RINGS 1 Thesis Presented for the Degree Of
1 THE STUDY OF SATURN'S RINGS 1610-1675, Thesis presented for the Degree of Doctor of Philosophy in the Field of History of Science by Albert Van Haden Department of History of Science and Technology Imperial College of Science and Teohnology University of London May, 1970 2 ABSTRACT Shortly after the publication of his Starry Messenger, Galileo observed the planet Saturn for the first time through a telescope. To his surprise he discovered that the planet does.not exhibit a single disc, as all other planets do, but rather a central disc flanked by two smaller ones. In the following years, Galileo found that Sa- turn sometimes also appears without these lateral discs, and at other times with handle-like appendages istead of round discs. These ap- pearances posed a great problem to scientists, and this problem was not solved until 1656, while the solution was not fully accepted until about 1670. This thesis traces the problem of Saturn, from its initial form- ulation, through the period of gathering information, to the final stage in which theories were proposed, ending with the acceptance of one of these theories: the ring-theory of Christiaan Huygens. Although the improvement of the telescope had great bearing on the problem of Saturn, and is dealt with to some extent, many other factors were in- volved in the solution of the problem. It was as much a perceptual problem as a technical problem of telescopes, and the mental processes that led Huygens to its solution were symptomatic of the state of science in the 1650's and would have been out of place and perhaps impossible before Descartes. -
Viscosity from Newton to Modern Non-Equilibrium Statistical Mechanics
Viscosity from Newton to Modern Non-equilibrium Statistical Mechanics S´ebastien Viscardy Belgian Institute for Space Aeronomy, 3, Avenue Circulaire, B-1180 Brussels, Belgium Abstract In the second half of the 19th century, the kinetic theory of gases has probably raised one of the most impassioned de- bates in the history of science. The so-called reversibility paradox around which intense polemics occurred reveals the apparent incompatibility between the microscopic and macroscopic levels. While classical mechanics describes the motionof bodies such as atoms and moleculesby means of time reversible equations, thermodynamics emphasizes the irreversible character of macroscopic phenomena such as viscosity. Aiming at reconciling both levels of description, Boltzmann proposed a probabilistic explanation. Nevertheless, such an interpretation has not totally convinced gen- erations of physicists, so that this question has constantly animated the scientific community since his seminal work. In this context, an important breakthrough in dynamical systems theory has shown that the hypothesis of microscopic chaos played a key role and provided a dynamical interpretation of the emergence of irreversibility. Using viscosity as a leading concept, we sketch the historical development of the concepts related to this fundamental issue up to recent advances. Following the analysis of the Liouville equation introducing the concept of Pollicott-Ruelle resonances, two successful approaches — the escape-rate formalism and the hydrodynamic-mode method — establish remarkable relationships between transport processes and chaotic properties of the underlying Hamiltonian dynamics. Keywords: statistical mechanics, viscosity, reversibility paradox, chaos, dynamical systems theory Contents 1 Introduction 2 2 Irreversibility 3 2.1 Mechanics. Energyconservationand reversibility . ........................ 3 2.2 Thermodynamics. -
Appendix I Lunar and Martian Nomenclature
APPENDIX I LUNAR AND MARTIAN NOMENCLATURE LUNAR AND MARTIAN NOMENCLATURE A large number of names of craters and other features on the Moon and Mars, were accepted by the IAU General Assemblies X (Moscow, 1958), XI (Berkeley, 1961), XII (Hamburg, 1964), XIV (Brighton, 1970), and XV (Sydney, 1973). The names were suggested by the appropriate IAU Commissions (16 and 17). In particular the Lunar names accepted at the XIVth and XVth General Assemblies were recommended by the 'Working Group on Lunar Nomenclature' under the Chairmanship of Dr D. H. Menzel. The Martian names were suggested by the 'Working Group on Martian Nomenclature' under the Chairmanship of Dr G. de Vaucouleurs. At the XVth General Assembly a new 'Working Group on Planetary System Nomenclature' was formed (Chairman: Dr P. M. Millman) comprising various Task Groups, one for each particular subject. For further references see: [AU Trans. X, 259-263, 1960; XIB, 236-238, 1962; Xlffi, 203-204, 1966; xnffi, 99-105, 1968; XIVB, 63, 129, 139, 1971; Space Sci. Rev. 12, 136-186, 1971. Because at the recent General Assemblies some small changes, or corrections, were made, the complete list of Lunar and Martian Topographic Features is published here. Table 1 Lunar Craters Abbe 58S,174E Balboa 19N,83W Abbot 6N,55E Baldet 54S, 151W Abel 34S,85E Balmer 20S,70E Abul Wafa 2N,ll7E Banachiewicz 5N,80E Adams 32S,69E Banting 26N,16E Aitken 17S,173E Barbier 248, 158E AI-Biruni 18N,93E Barnard 30S,86E Alden 24S, lllE Barringer 29S,151W Aldrin I.4N,22.1E Bartels 24N,90W Alekhin 68S,131W Becquerei -
Fundamental Geometrodynamic Justification of Gravitomagnetism
Issue 2 (October) PROGRESS IN PHYSICS Volume 16 (2020) Fundamental Geometrodynamic Justification of Gravitomagnetism (I) G. G. Nyambuya National University of Science and Technology, Faculty of Applied Sciences – Department of Applied Physics, Fundamental Theoretical and Astrophysics Group, P.O. Box 939, Ascot, Bulawayo, Republic of Zimbabwe. E-mail: [email protected] At a most fundamental level, gravitomagnetism is generally assumed to emerge from the General Theory of Relativity (GTR) as a first order approximation and not as an exact physical phenomenon. This is despite the fact that one can justify its existence from the Law of Conservation of Mass-Energy-Momentum in much the same manner one can justify Maxwell’s Theory of Electrodynamics. The major reason for this is that in the widely accepted GTR, Einstein cast gravitation as a geometric phenomenon to be understood from the vantage point of the dynamics of the metric of spacetime. In the literature, nowhere has it been demonstrated that one can harness the Maxwell Equa- tions applicable to the case of gravitation – i.e. equations that describe the gravitational phenomenon as having a magnetic-like component just as happens in Maxwellian Elec- trodynamics. Herein, we show that – under certain acceptable conditions where Weyl’s conformal scalar [1] is assumed to be a new kind of pseudo-scalar and the metric of spacetime is decomposed as gµν = AµAν so that it is a direct product of the components of a four-vector Aµ – gravitomagnetism can be given an exact description from within Weyl’s beautiful but supposedly failed geometry. My work always tried to unite the Truth with the Beautiful, consistent mathematical framework that has a direct corre- but when I had to choose one or the other, I usually chose the spondence with physical and natural reality as we know it. -
Einstein, History, and Other Passions : the Rebellion Against Science at the End of the Twentieth Century
Einstein, history, and other passions : the rebellion against science at the end of the twentieth century The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Holton, Gerald James. 2000. Einstein, history, and other passions : the rebellion against science at the end of the twentieth century. Cambridge, MA: Harvard University Press. Published Version http://www.hup.harvard.edu/catalog.php?isbn=9780674004337 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:23975375 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA EINSTEIN, HISTORY, ANDOTHER PASSIONS ;/S*6 ? ? / ? L EINSTEIN, HISTORY, ANDOTHER PASSIONS E?3^ 0/" Cf72fM?y GERALD HOLTON A HARVARD UNIVERSITY PRESS C%772^r?<%gf, AizziMc^zzyeZZy LozzJozz, E?zg/%??J Q AOOO Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book and Addison-Wesley was aware of a trademark claim, the designations have been printed in capital letters. PHYSICS RESEARCH LIBRARY NOV 0 4 1008 Copyright @ 1996 by Gerald Holton All rights reserved HARVARD UNIVERSITY Printed in the United States of America An earlier version of this book was published by the American Institute of Physics Press in 1995. First Harvard University Press paperback edition, 2000 o/ CoMgre.w C%t%/og;Hg-zM-PMMt'%tz'c7t Dzztzz Holton, Gerald James. -
Summary of Sexual Abuse Claims in Chapter 11 Cases of Boy Scouts of America
Summary of Sexual Abuse Claims in Chapter 11 Cases of Boy Scouts of America There are approximately 101,135sexual abuse claims filed. Of those claims, the Tort Claimants’ Committee estimates that there are approximately 83,807 unique claims if the amended and superseded and multiple claims filed on account of the same survivor are removed. The summary of sexual abuse claims below uses the set of 83,807 of claim for purposes of claims summary below.1 The Tort Claimants’ Committee has broken down the sexual abuse claims in various categories for the purpose of disclosing where and when the sexual abuse claims arose and the identity of certain of the parties that are implicated in the alleged sexual abuse. Attached hereto as Exhibit 1 is a chart that shows the sexual abuse claims broken down by the year in which they first arose. Please note that there approximately 10,500 claims did not provide a date for when the sexual abuse occurred. As a result, those claims have not been assigned a year in which the abuse first arose. Attached hereto as Exhibit 2 is a chart that shows the claims broken down by the state or jurisdiction in which they arose. Please note there are approximately 7,186 claims that did not provide a location of abuse. Those claims are reflected by YY or ZZ in the codes used to identify the applicable state or jurisdiction. Those claims have not been assigned a state or other jurisdiction. Attached hereto as Exhibit 3 is a chart that shows the claims broken down by the Local Council implicated in the sexual abuse. -
General Relativity
Chapter 3 Differential Geometry II 3.1 Connections and covariant derivatives 3.1.1 Linear Connections The curvature of the two-dimensional sphere S 2 can be described by Caution Whitney’s (strong) embedding the sphere into a Euclidean space of the next-higher dimen- embedding theorem states that sion, R3. However, (as far as we know) there is no natural embedding any smooth n-dimensional mani- of our four-dimensional curved spacetime into R5, and thus we need a fold (n > 0) can be smoothly description of curvature which is intrinsic to the manifold. embedded in the 2n-dimensional Euclidean space R2n. Embed- There is a close correspondence between the curvature of a manifold and dings into lower-dimensional Eu- the transport of vectors along curves. clidean spaces may exist, but not As we have seen before, the structure of a manifold does not trivially necessarily so. An embedding allow to compare vectors which are elements of tangent spaces at two f : M → N of a manifold M into different points. We will thus have to introduce an additional structure a manifold N is an injective map which allows us to meaningfully shift vectors from one point to another such that f (M) is a submanifold on the manifold. of N and M → f (M)isdifferen- tiable. Even before we do so, it is intuitively clear how vectors can be trans- ported along closed paths in flat Euclidean space, say R3. There, the vector arriving at the starting point after the transport will be identical to the vector before the transport. -
304 Index Index Index
_full_alt_author_running_head (change var. to _alt_author_rh): 0 _full_alt_articletitle_running_head (change var. to _alt_arttitle_rh): 0 _full_article_language: en 304 Index Index Index Adamson, Robert (1821–1848) 158 Astronomische Gesellschaft 216 Akkasbashi, Reza (1843–1889) viiii, ix, 73, Astrolog 72 75-78, 277 Astronomical unit, the 192-94 Airy, George Biddell (1801–1892) 137, 163, 174 Astrophysics xiv, 7, 41, 57, 118, 119, 139, 144, Albedo 129, 132, 134 199, 216, 219 Aldrin, Edwin Buzz (1930) xii, 244, 245, 248, Atlas Photographique de la Lune x, 15, 126, 251, 261 127, 279 Almagestum Novum viii, 44-46, 274 Autotypes 186 Alpha Particle Spectrometer 263 Alpine mountains of Monte Rosa and BAAS “(British Association for the Advance- the Zugspitze, the 163 ment of Science)” 26, 27, 125, 128, 137, Al-Biruni (973–1048) 61 152, 158, 174, 277 Al-Fath Muhammad Sultan, Abu (n.d.) 64 BAAS Lunar Committee 125, 172 Al-Sufi, Abd al-Rahman (903–986) 61, 62 Bahram Mirza (1806–1882) 72 Al-Tusi, Nasir al-Din (1202–1274) 61 Baillaud, Édouard Benjamin (1848–1934) 119 Amateur astronomer xv, 26, 50, 51, 56, 60, Ball, Sir Robert (1840–1913) 147 145, 151 Barlow Lens 195, 203 Amir Kabir (1807–1852) 71 Barnard, Edward Emerson (1857–1923) 136 Amir Nezam Garusi (1820–1900) 87 Barnard Davis, Joseph (1801–1881) 180 Analysis of the Moon’s environment 239 Beamish, Richard (1789–1873) 178-81 Andromeda nebula xii, 208, 220-22 Becker, Ernst (1843–1912) 81 Antoniadi, Eugène M. (1870–1944) 269 Beer, Wilhelm Wolff (1797–1850) ix, 54, 56, Apollo Missions NASA 32, 231, 237, 239, 240, 60, 123, 124, 126, 130, 139, 142, 144, 157, 258, 261, 272 190 Apollo 8 xii, 32, 239-41 Bell Laboratories 270 Apollo 11 xii, 59, 237, 240, 244-46, 248-52, Beg, Ulugh (1394–1449) 63, 64 261, 280 Bergedorf 207 Apollo 13 254 Bergedorfer Spektraldurchmusterung 216 Apollo 14 240, 253-55 Biancani, Giuseppe (n.d.) 40, 274 Apollo 15 255 Biot, Jean Baptiste (1774–1862) 1,8, 9, 121 Apollo 16 240, 255-57 Birt, William R.