Aspectos Históricos Da Endocardite Infecciosa
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RADAR POLARIZATION PROPERTIES AND LUNAR SECONDARY CRATERING A Dissertation Presented to the Faculty of the Graduate School of Cornell University In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy by Kassandra Martin-Wells January 2013 © 2013 Kassandra Martin-Wells RADAR POLARIZATION PROPERTIES AND LUNAR SECONDARY CRATERING Kassandra Martin-Wells, Ph. D. Cornell University 2013 Age dating of planetary surfaces relies on an accurate correlation between lunar crater size-frequency distributions and radiometric ages of samples returned from the Moon. For decades, it has been assumed that cratering records are dominated by “primary” impacts of interplanetary bolides [McEwen et al., 2005]. Unlike primary craters, secondary craters, which originate as ejecta from large primary events, occur in large clusters in both space and time. It was long believed that the majority of secondary craters formed at low velocities near their parent crater, resulting in a class of craters with morphologies which are easily distinguished from primary craters of a similar size [McEwen et al., 2005]. However, recent work by Bierhaus et al. (2005), McEwen et al. (2005) argues that cratering records in the Solar System may be strongly contaminated by hard-to-identify secondary craters. They advise caution when relying on counts at small diameters [McEwen et al., 2005; Bierhaus et al., 2005]. Despite the difficulties, something must be done to improve the accuracy of age dates derived from size-frequency distributions of small craters. In this thesis, a method of secondary crater identification based on radar circular polarization properties is presented. The radar polarization and photographic studies of lunar secondary craters in this thesis reveal that secondary cratering is a widespread phenomenon on the lunar surface. -
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. -
July 2020 in This Issue Online Readers, ALPO Conference November 6-7, 2020 2 Lunar Calendar July 2020 3 Click on Images an Invitation to Join ALPO 3 for Hyperlinks
A publication of the Lunar Section of ALPO Edited by David Teske: [email protected] 2162 Enon Road, Louisville, Mississippi, USA Recent back issues: http://moon.scopesandscapes.com/tlo_back.html July 2020 In This Issue Online readers, ALPO Conference November 6-7, 2020 2 Lunar Calendar July 2020 3 click on images An Invitation to Join ALPO 3 for hyperlinks. Observations Received 4 By the Numbers 7 Submission Through the ALPO Image Achieve 4 When Submitting Observations to the ALPO Lunar Section 9 Call For Observations Focus-On 9 Focus-On Announcement 10 2020 ALPO The Walter H. Haas Observer’s Award 11 Sirsalis T, R. Hays, Jr. 12 Long Crack, R. Hill 13 Musings on Theophilus, H. Eskildsen 14 Almost Full, R. Hill 16 Northern Moon, H. Eskildsen 17 Northwest Moon and Horrebow, H. Eskildsen 18 A Bit of Thebit, R. Hill 19 Euclides D in the Landscape of the Mare Cognitum (and Two Kipukas?), A. Anunziato 20 On the South Shore, R. Hill 22 Focus On: The Lunar 100, Features 11-20, J. Hubbell 23 Recent Topographic Studies 43 Lunar Geologic Change Detection Program T. Cook 120 Key to Images in this Issue 134 These are the modern Golden Days of lunar studies in a way, with so many new resources available to lu- nar observers. Recently, we have mentioned Robert Garfinkle’s opus Luna Cognita and the new lunar map by the USGS. This month brings us the updated, 7th edition of the Virtual Moon Atlas. These are all wonderful resources for your lunar studies. -
Facts & Features Lunar Surface Elevations Six Apollo Lunar
Greek Mythology Quadrants Maria & Related Features Lunar Surface Elevations Facts & Features Selene is the Moon and 12 234 the goddess of the Moon, 32 Diameter: 2,160 miles which is 27.3% of Earth’s equatorial diameter of 7,926 miles 260 Lacus daughter of the titans 71 13 113 Mare Frigoris Mare Humboldtianum Volume: 2.03% of Earth’s volume; 49 Moons would fit inside Earth 51 103 Mortis Hyperion and Theia. Her 282 44 II I Sinus Iridum 167 125 321 Lacus Somniorum Near Side Mass: 1.62 x 1023 pounds; 1.23% of Earth’s mass sister Eos is the goddess 329 18 299 Sinus Roris Surface Area: 7.4% of Earth’s surface area of dawn and her brother 173 Mare Imbrium Mare Serenitatis 85 279 133 3 3 3 Helios is the Sun. Selene 291 Palus Mare Crisium Average Density: 3.34 gm/cm (water is 1.00 gm/cm ). Earth’s density is 5.52 gm/cm 55 270 112 is often pictured with a 156 Putredinis Color-coded elevation maps Gravity: 0.165 times the gravity of Earth 224 22 237 III IV cresent Moon on her head. 126 Mare Marginis of the Moon. The difference in 41 Mare Undarum Escape Velocity: 1.5 miles/sec; 5,369 miles/hour Selenology, the modern-day 229 Oceanus elevation from the lowest to 62 162 25 Procellarum Mare Smythii Distances from Earth (measured from the centers of both bodies): Average: 238,856 term used for the study 310 116 223 the highest point is 11 miles. -
2016-2017 Magazine
Holland Hall THE HOLLAND HALL SCHOOL MAGAZINE Spring/Summer 2016 Spring/Summer 2016 3 From the Head of School 4 SPECIAL: Class of 2016 10 CAMPUS VIEW: A Look at School Activities 22 FEATURE STORY: Bringing Inspiration to Life 25 FEATURE STORY: Living History 26 SPOTLIGHT: Focus on School Stories 36 Advancement News 42 2015-2016 Annual Report 50 Alumni Matters 66 LANDMARKS: Announcements & Milestones FRONT COVER: Primary School students celebrate Dia de los Niños, a celebration of children, families, and reading that culminates yearly on April 30. The celebration emphasizes the importance of literacy for children of all linguistic and cultural backgrounds. Spring/Summer 2016 3 2016-17 BOARD OF TRUSTEES Welcome from the Head of School. Roger B. Collins Chair Dear Holland Hall Community, J.W. Craft Annual Field Day festivities are behind us and our Upper School students and choirs recently Vice Chair performed the 54th annual Service of Lessons and Carols at Trinity Church in downtown Tulsa. Stephen J. Brady Much has been happening on our 162 acres — some familiar, some new. But as each day passes, Treasurer and as we learn from our students — and our students learn from us — much remains the same. Amy Fogleman Koontz Secretary Forever we will be focused on the importance of relationships. Just as indelibly, we remain focused on bringing out the best in one another. The Holland Hall experience is, in its truest form, J. Darin Alred ’84 an apprenticeship in self-discipline. The independent-minded, thoughtful students who leave us Alumni Association President for college and future leadership opportunities do so having learned in the company of thinkers Kenneth D. -
Communications of the LUNAR and PLANETARY LABORATORY
Communications of the LUNAR AND PLANETARY LABORATORY Number 70 Volume 5 Part 1 THE UNIVERSITY OF ARIZONA 1966 Communications of the Lunar and Planetary Laboratory These Communications contain the shorter publications and reports by the staff of the Lunar and Planetary Laboratory. They may be either original contributions, reprints of articles published in professional journals, preliminary reports, or announcements. Tabular material too bulky or specialized for regular journals is included if future use of such material appears to warrant it. The Communications are issued as separate numbers, but they are paged and indexed by volumes. The Communications are mailed to observatories and to laboratories known to be engaged in planetary, interplanetary or geophysical research in exchange for their reports and publica- tions. The University of Arizona Press can supply at cost copies to other libraries and interested persons. The University of Arizona GERARD P. KUIPER, Director Tucson, Arizona Lunar and Planetary Laboratory Published with the support of the National Aeronautics and Space Administration Library of Congress Catalog Number 62-63619 NO. 70 THE SYSTEM OF LUNAR CRATERS, QUADRANT IV by D. W. G. ARTHUR, RUTH H. PELLICORI, AND C. A. WOOD May25,1966 , ABSTRACT The designation, diameter, position, central peak information, and state of completeness are listed for each discernible crater with a diameter exceeding 3.5 km in the fourth lunar quadrant. The catalog contains about 8,000 items and is illustrated by a map in 11 sections. hiS Communication is the fourth and final part of listed in the catalog nor shown in the accompanying e System of Lunar Craters, which is a_calalag maps. -
Global Challenges
6–10 JANUARY 2020 | ORLANDO, FL DRIVING AEROSPACE SOLUTIONS FOR GLOBAL CHALLENGES What’s going on in Page 25 aiaa.org/scitech #aiaaSciTech From the forefront of innovation to the frontlines of the mission. No matter the mission, Lockheed Martin uses a proven approach: engineer with purpose, innovate with passion and define the future. We take time to understand our customer’s challenges and provide solutions that help them keep the world secure. Their mission defines our purpose. Learn more at lockheedmartin.com. © 2019 Lockheed Martin Corporation FG19-23960_002 AIAA sponsorship.indd 1 12/10/19 3:20 PM Live: n/a Trim: H: 8.5in W: 11in Job Number: FG18-23208_002 Bleed: .25 all around Designer: Kevin Gray Publication: AIAA Sponsorship Gutter: None Communicator: Ryan Alford Visual: Male and female in front of screens. Resolution: 300 DPI Due Date: 12/10/19 Country: USA Density: 300 Color Space: CMYK NETWORK NAME: SciTech ON-SITE Wi-Fi From the forefront of innovation › PASSWORD: 2020scitech to the frontlines of the mission. CONTENTS Technical Program Committee .................................................................4 Welcome ........................................................................................................5 Sponsors and Supporters ..........................................................................7 Forum Overview ...........................................................................................8 Pre-Forum Activities ................................................................................. -
Are You a Cancelled Voter? If Your Name Is on This List, You're Not Registered
Are You A Cancelled Voter? If Your Name Is On This List, You're Not Registered Last Name First Name AALBERS BARBARA AALBERS GLADYS AALDERINK BRETT AALSBURG MARGARET AARDEMA CHARLES AARDEMA IRENE AARNS STEPHEN AARON DEBORAH ABAD ALFREDO ABAUNZA SANDRA ABBAS ABDUL-MAHDI ABBAS RANI ABBEY BETTY ABBEY EVERNEAL ABBEY PAULETTE ABBGY SCOTTY-LANCE ABBOTT ROBIN ABBOTT RUDYARD ABBOTT STANLEY ABBOTT STUART ABDALLE AMAL ABDI AMINA ABDOLKADIR FATMA ABDUL-HAMEED SHAAF ABDULLAH AL-RASHEED ABDULLAH AMY ABDULLAH ISMAIL ABDULLAH SAABIR ABDULLAH-LATEEF SALEEM ABEDI JULIA ABEL BRIAN ABEL DANIELA ABELL JULIA ABELLA LUIS ABEN SUUR ABEYTA ANGELINA ABHALTER KRISTIN ABISSI PAUL ABIYO OMAR ABLEIDINGER AMY ABMA AARON ABMA ANNALISE ABNER JIM ABNEY ANDRE ABNEY ASHLEY ABNEY BARBARA ABNEY HEAVENLE-CRYSTAL ABNEY WILLIE ABOLSI-EPALFASSA-KONDO HOLALI ABRACZINSKAS RAYMOND ABRAHA SOLOMON ABRAHAM BENJAMIN ABRAHAM CHARMAINE ABRAHAM DAVID ABRAHAM HEATHER ABRAHAM OMARI ABRAHAM RONALD ABRAHAM SHANTA ABRAM CECILIA ABRAM JAMES ABRAM JOHN ABRAM NICHOLAS ABRAMAJTYS AMY ABRAMOWICZ PAUL ABRAMOWSKI BETTY ABRAMS JAMES ABRAMS TRACIA ABRAR POYA ABREU HILDA ABREU JIM ABREU MIGUEL ABREU-BONILLA ISMAEL ABRIL JUAN ABRON JAMEL ABSHER NAJIB ABSOLON TIBOR ABU-BAKR MUHAMMADILYAS ABU-HATLAH ABDULRAHMAN ABU-TALEB IBRAHIM ABUKAR ALI ABUNAW ELIZABETH ABURTO-MARTINEZ ERIKA ACALCO JAVIER ACEVEDO ANA ACEVEDO CASEY ACHENBACH JUSTIN ACHTERHOF ROBERT ACKER JANET ACKERMAN ELAINE ACKERMAN ROBERT ACKERMAN VERNA ACKERT CAITLIN ACKLEY PHILLIP ACKLIN RODNEY ACKLIN TROY ACOSTA DULCE ACOSTA DULCE ACOSTA JACQUELINE -
Moon Course Section 20-26 V1.0
Around the Moon in 28 Days: Lunar Observing for Beginners Course Notes Section 20 - Lunar Day 15 Section 21 - Lunar Day 16 Section 22 - Lunar Day 17 Section 23 - Lunar Day 18 Section 24 - Lunar Day 19 Section 25 - Lunar Day 20 Section 26 - Lunar Day 21 (Last Quarter) Copyright © 2010 Mintaka Publishing Inc. Section 20 - Lunar Day 15 Tonight we'll begin a limb-to-limb lunar history adventure by learning about the Soviet probe, Lunik 9. In 1966, the unmanned lunar traveler became the first to achieve a soft landing on the Moon’s surface and successfully transmit photographs back to Earth. The lander weighed in at 99 kg, and had four outward opening antenna petals. Within five minutes of touchdown on January 31, the antennae sprang to life and the on-board television cameras began broadcasting the first panoramic images of the surface of another world – thus proving a lander would not simply sink into the lunar dust. Last contact with the spacecraft occurred just before midnight on February 6, 1966. If you'd like to see where Lunik 9’s remains stand, turn your binoculars or telescopes towards the western lunar limb for Oceanus Procellarum. On its western edge, you can easily identify the dark oval of crater Grimaldi. About one Grimaldi- length northward and on the western shore of Procellarum is where you will find Lunik 9’s resting place. Figure 20-1: The major features of the eastern part of the Moon on Day 15 Around the Moon in 28 Days: Lunar Observing for Beginners Figure 20-2: Image from the Luna 9 lander in February, 1966 in the Oceanus Procellarum Now let's go for the opposite limb to check out the eastern edge of Mare Crisium in a different relief. -
Lunar Terminology 341
Lunar Terminology 341 Lunar Terminology Are there still a few words associated with the Moon that you do not understand yet? Here is a simple glossary to help you along… Albedo – The amount of reflectiveness of a certain surface feature Anorthosite – Granular igneous rock usually of soda-lime feldspar Apogee – The point of the Moon’s orbit furthest from Earth – 406,700 km Basin – A large impact crater, with a diameter in excess of 100 km Breccia – Coarse, preexisting rock and angular fragments Caldera – Volcano summit depression formed by explosion or collapse Catena – Crater chain Cavus – Groups of hollows or irregular depressions Craters – Indentations that are bowl or saucer shaped in configuration; a depression with steep slopes on the surface; formed by impact or geologic activity Diurnal – A daily cycle Dorsum – ridge Ejecta – Impact crater material that is thrown clear of the source and covers the surface at least one crater diameter; streamers of material originating from a impact area Gibbous – Phase where more than half, but less than all, the Moon is illuminated Highlands – Densely cratered and higher elevated areas of the lunar surface Lacus – Small plain Lava – Volcanic rock present in mare areas; basalt flow Mare – The low surface reflectivity area filled with lava that covers the floors of older basins Mascon – Concentrations of mass on the lunar surface Mensa – Flat-topped ridges with cliff-like edges Mons – Mountain New – Phase during which the Moon is entirely in shadow Oceanus – A single, large dark area Palus – A small plain 342 Lunar Terminology Patera – A disfigured crater; complex with irregular edges Perigee – Point of lunar orbit closest to Earth – 356,400 km Planitia – A low plain Planum – A high plain Promontorium – A high point of land. -
Terahertz Quantum Cascade Lasers Benjamin S. Williams
Terahertz quantum cascade lasers by Benjamin S. Williams Submitted to the Department of Electrical Engineering and Computer Science in partial ful¯llment of the requirements for the degree of Doctor of Philosophy at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY August 2003 c Massachusetts Institute of Technology 2003. All rights reserved. ° Author . ............................................................ Department of Electrical Engineering and Computer Science August 22, 2003 Certi¯ed by. ....................................................... Qing Hu Professor Thesis Supervisor Accepted by . ..................................................... Arthur C. Smith Chairman, Department Committee on Graduate Students 2 Terahertz quantum cascade lasers by Benjamin S. Williams Submitted to the Department of Electrical Engineering and Computer Science on August 22, 2003, in partial ful¯llment of the requirements for the degree of Doctor of Philosophy Abstract The development of the terahertz frequency range (1{10 THz, ¸ 30{300 ¹m) has long been impeded by the relative dearth of compact, coherent radiation¼ sources of reasonable power. This thesis details the development of quantum cascade lasers (QCLs) that operate in the terahertz with photon energies below the semiconductor Reststrahlen band. Photons are emitted via electronic intersubband transitions that take place entirely within the conduction band, where the wavelength is chosen by engineering the well and barrier widths in multiple-quantum-well heterostructures. Fabrication of such long wavelength lasers has traditionally been challenging, since it is di±cult to obtain a population inversion between such closely spaced energy levels (¹h! 4{40 meV), and because traditional dielectric waveguides become extremely lossy¼ due to free carrier absorption. This thesis reports the development of terahertz QCLs in which the lower radiative state is depopulated via resonant longitudinal-optical phonon scattering. -
Thedatabook.Pdf
THE DATA BOOK OF ASTRONOMY Also available from Institute of Physics Publishing The Wandering Astronomer Patrick Moore The Photographic Atlas of the Stars H. J. P. Arnold, Paul Doherty and Patrick Moore THE DATA BOOK OF ASTRONOMY P ATRICK M OORE I NSTITUTE O F P HYSICS P UBLISHING B RISTOL A ND P HILADELPHIA c IOP Publishing Ltd 2000 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the publisher. Multiple copying is permitted in accordance with the terms of licences issued by the Copyright Licensing Agency under the terms of its agreement with the Committee of Vice-Chancellors and Principals. British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. ISBN 0 7503 0620 3 Library of Congress Cataloging-in-Publication Data are available Publisher: Nicki Dennis Production Editor: Simon Laurenson Production Control: Sarah Plenty Cover Design: Kevin Lowry Marketing Executive: Colin Fenton Published by Institute of Physics Publishing, wholly owned by The Institute of Physics, London Institute of Physics Publishing, Dirac House, Temple Back, Bristol BS1 6BE, UK US Office: Institute of Physics Publishing, The Public Ledger Building, Suite 1035, 150 South Independence Mall West, Philadelphia, PA 19106, USA Printed in the UK by Bookcraft, Midsomer Norton, Somerset CONTENTS FOREWORD vii 1 THE SOLAR SYSTEM 1