Order of Service for a Service of Thanksgiving
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Second-Order Correction to the Energy and Momentum in Plane Symmetric Gravitational Waves Like Spacetimes
S S symmetry Article The Second-Order Correction to the Energy and Momentum in Plane Symmetric Gravitational Waves Like Spacetimes Mutahir Ali *, Farhad Ali , Abdus Saboor, M. Saad Ghafar and Amir Sultan Khan Department of Mathematics, Kohat University of Science and Technology, Kohat 26000, Pakistan; [email protected] (F.A.); [email protected] (A.S.); [email protected] (M.S.G.); [email protected] (A.S.K.) * Correspondence: [email protected] Received: 5 December 2018; Accepted: 22 January 2019; Published: 13 February 2019 Abstract: This research provides second-order approximate Noether symmetries of geodetic Lagrangian of time-conformal plane symmetric spacetime. A time-conformal factor is of the form ee f (t) which perturbs the plane symmetric static spacetime, where e is small a positive parameter that produces perturbation in the spacetime. By considering the perturbation up to second-order in e in plane symmetric spacetime, we find the second order approximate Noether symmetries for the corresponding Lagrangian. Using Noether theorem, the corresponding second order approximate conservation laws are investigated for plane symmetric gravitational waves like spacetimes. This technique tells about the energy content of the gravitational waves. Keywords: Einstein field equations; time conformal spacetime; approximate conservation of energy 1. Introduction Gravitational waves are ripples in the fabric of space-time produced by some of the most violent and energetic processes like colliding black holes or closely orbiting black holes and neutron stars (binary pulsars). These waves travel with the speed of light and depend on their sources [1–5]. The study of these waves provide us useful information about their sources (black holes and neutron stars). -
The Real Issue Stephen Hawking, the Big Bang, and God
The Real Issue Stephen Hawking, The Big Bang, and God Meet the Author: Dr. Henry "Fritz" Schaefer III Dr. "Fritz" Schaefer is the Graham Perdue Professor of Chemistry and the director of the Center for Computational Quantum Chemistry at the University of Georgia. He has been nominated for the Nobel Prize and was recently cited as the third most quoted chemist in the world. "The significance and joy in my science comes in the occasional moments of discovering something new and saying to myself, `So that's how God did it!' My goal is to understand a little corner of God's plan." -U.S. News & World Report, Dec. 23, 1991. (This article is a transcript of a lecture Dr. Schaefer presented at the University of Colorado in the Spring of 1994, sponsored by Christian Leadership and other campus ministries. Over 500 students and professors were present.) Stephen Hawking's bestseller A Brief History of Time is the most popular book about cosmology ever written. The questions cosmology addresses are scientifically and theologically profound. Hawking's book covers both of these implications. Cosmology is the study of the universe as a whole--it's structure, origin and development. I won't answer all the questions Hawking raises concerning cosmology, but I will try to make comments on many of them. I caution here that you should not confuse cosmology with cosmetology, the art of beautifying the hair, skin, and nails! Here are some of the questions cosmology seeks to answer (As elsewhere in this lecture, I borrow heavily from astrophysicist Hugh Ross' excellent books The Fingerprint of God and The Creator and the Cosmos.): 1. -
Untitled-1 1 Contents Highlights New Acquisitions Non Fiction Lifestyle, Health & Wellbeing Fiction Recently Published
Untitled-1 1 Contents Highlights New Acquisitions Non Fiction Lifestyle, Health & Wellbeing Fiction Recently Published Picador Contacts Sophie Brewer, Associate Publisher: [email protected] Jon Mitchell, Rights Director: [email protected] Anna Shora, Senior Rights Manager: [email protected] Mairéad Loftus, Rights Executive: [email protected] Aisling Brennan, Rights Assistant: [email protected] Sub-Agents Brazil – Tassy Barham Baltic states – ANA Baltic Bulgaria and Serbia – ANA Sofia *China – ANA Beijing *China – Peony Literary Agency Czech & Slovak Reps – ANA Prague Greece – J.L.M. Agency Hungary & Croatia – ANA Budapest Israel – The Deborah Harris Agency *Japan – The English Agency *Japan – Tuttle-Mori *Japan – Japan Uni Korea – Eric Yang Agency Romania – Simona Kessler Russia – ANA Moscow *Taiwan – ANA Taipei *Taiwan – Peony Literary Agency Turkey – Anatolia Lit * Non-exclusive agent Highlights Lily's Promise How I Survived Auschwitz and Found the Strength to Live Lily Ebert and Dov Forman The incredibly moving and powerful memoir of an Auschwitz survivor who made headlines around the world in 2020. A heart-wrenching and ultimately life-affirming story that demonstrates the power of love to see us through the darkest of times. When Holocaust survivor Lily Ebert was liberated in 1945, a Jewish-American soldier gave her a banknote on which he’d written ‘Good luck and happiness’. And when her great-grandson, Dov, decided to use social media to track down the family of the GI in 2020, 96-year-old Lily found herself making headlines around the world. Lily had promised herself that if she survived Auschwitz she would tell everyone the truth about the camp. -
Science & ROGER PENROSE
Science & ROGER PENROSE Live Webinar - hosted by the Center for Consciousness Studies August 3 – 6, 2021 9:00 am – 12:30 pm (MST-Arizona) each day 4 Online Live Sessions DAY 1 Tuesday August 3, 2021 9:00 am to 12:30 pm MST-Arizona Overview / Black Holes SIR ROGER PENROSE (Nobel Laureate) Oxford University, UK Tuesday August 3, 2021 9:00 am – 10:30 am MST-Arizona Roger Penrose was born, August 8, 1931 in Colchester Essex UK. He earned a 1st class mathematics degree at University College London; a PhD at Cambridge UK, and became assistant lecturer, Bedford College London, Research Fellow St John’s College, Cambridge (now Honorary Fellow), a post-doc at King’s College London, NATO Fellow at Princeton, Syracuse, and Cornell Universities, USA. He also served a 1-year appointment at University of Texas, became a Reader then full Professor at Birkbeck College, London, and Rouse Ball Professor of Mathematics, Oxford University (during which he served several 1/2-year periods as Mathematics Professor at Rice University, Houston, Texas). He is now Emeritus Rouse Ball Professor, Fellow, Wadham College, Oxford (now Emeritus Fellow). He has received many awards and honorary degrees, including knighthood, Fellow of the Royal Society and of the US National Academy of Sciences, the De Morgan Medal of London Mathematical Society, the Copley Medal of the Royal Society, the Wolf Prize in mathematics (shared with Stephen Hawking), the Pomeranchuk Prize (Moscow), and one half of the 2020 Nobel Prize in Physics, the other half shared by Reinhard Genzel and Andrea Ghez. -
Stephen Hawking: a Brief History of Genius - in Pictures in Memory of Stephen Hawking
Stephen Hawking: A brief history of genius - in pictures In memory of Stephen Hawking Complied by: Manjunath.R #16/1, 8th Main Road, Shivanagar, Rajajinagar, Bangalore560010, Karnataka, India *Corresponding Author Email: [email protected] *Website: http://www.myw3schools.com/ Stephen Hawking was born precisely 3 hundred years after the demise of the scientist Galileo, so perhaps it became written with-inside the stars that he might turn out to be a well-known scientist in his personal right. Although he became recognized with a neurological ailment at age 21, Stephen did not allow the disease outline his life. Known for his groundbreaking work in physics, and recognized through his wheelchair and automatic voice system, Stephen endured his studies till his demise in 2018. He is great recognized for his black hole theories and his great- promoting book A Brief History of Time. Stephen Hawking is an example of someone who had a splendid mind, however a fair extra spirit. Stephen Hawking Parents 1942 Isobel Hawking (mother), holding Stephen shortly after his birth. 1942 Dr Frank Hawking (father), holding Stephen shortly after his birth. Hawking at a tender age of three. 1946 Professor Stephen Hawking as a young boy. Stephen Hawking with his siblings Philippa and Mary Stephen Hawking steering a boat as he heads for fishing during his teenage years. Schoolboy Stephen, aged 12, casually on his bicycle near his childhood home in St Albans. Early 1950's Stephen Hawking (far left) at school in St Albans, working with fellow students and teacher on assembling an early computer. Stephen Hawking as a young boy, aged 12, standing outside his house in 1954. -
Recent Observations of Gravitational Waves by LIGO and Virgo Detectors
universe Review Recent Observations of Gravitational Waves by LIGO and Virgo Detectors Andrzej Królak 1,2,* and Paritosh Verma 2 1 Institute of Mathematics, Polish Academy of Sciences, 00-656 Warsaw, Poland 2 National Centre for Nuclear Research, 05-400 Otwock, Poland; [email protected] * Correspondence: [email protected] Abstract: In this paper we present the most recent observations of gravitational waves (GWs) by LIGO and Virgo detectors. We also discuss contributions of the recent Nobel prize winner, Sir Roger Penrose to understanding gravitational radiation and black holes (BHs). We make a short introduction to GW phenomenon in general relativity (GR) and we present main sources of detectable GW signals. We describe the laser interferometric detectors that made the first observations of GWs. We briefly discuss the first direct detection of GW signal that originated from a merger of two BHs and the first detection of GW signal form merger of two neutron stars (NSs). Finally we present in more detail the observations of GW signals made during the first half of the most recent observing run of the LIGO and Virgo projects. Finally we present prospects for future GW observations. Keywords: gravitational waves; black holes; neutron stars; laser interferometers 1. Introduction The first terrestrial direct detection of GWs on 14 September 2015, was a milestone Citation: Kro´lak, A.; Verma, P. discovery, and it opened up an entirely new window to explore the universe. The combined Recent Observations of Gravitational effort of various scientists and engineers worldwide working on the theoretical, experi- Waves by LIGO and Virgo Detectors. -
MATTERS of GRAVITY, a Newsletter for the Gravity Community, Number 3
MATTERS OF GRAVITY Number 3 Spring 1994 Table of Contents Editorial ................................................... ................... 2 Correspondents ................................................... ............ 2 Gravity news: Open Letter to gravitational physicists, Beverly Berger ........................ 3 A Missouri relativist in King Gustav’s Court, Clifford Will .................... 6 Gary Horowitz wins the Xanthopoulos award, Abhay Ashtekar ................ 9 Research briefs: Gamma-ray bursts and their possible cosmological implications, Peter Meszaros 12 Current activity and results in laboratory gravity, Riley Newman ............. 15 Update on representations of quantum gravity, Donald Marolf ................ 19 Ligo project report: December 1993, Rochus E. Vogt ......................... 23 Dark matter or new gravity?, Richard Hammond ............................. 25 Conference Reports: Gravitational waves from coalescing compact binaries, Curt Cutler ........... 28 Mach’s principle: from Newton’s bucket to quantum gravity, Dieter Brill ..... 31 Cornelius Lanczos international centenary conference, David Brown .......... 33 Third Midwest relativity conference, David Garfinkle ......................... 36 arXiv:gr-qc/9402002v1 1 Feb 1994 Editor: Jorge Pullin Center for Gravitational Physics and Geometry The Pennsylvania State University University Park, PA 16802-6300 Fax: (814)863-9608 Phone (814)863-9597 Internet: [email protected] 1 Editorial Well, this newsletter is growing into its third year and third number with a lot of strength. In fact, maybe too much strength. Twelve articles and 37 (!) pages. In this number, apart from the ”traditional” research briefs and conference reports we also bring some news for the community, therefore starting to fulfill the original promise of bringing the gravity/relativity community closer together. As usual I am open to suggestions, criticisms and proposals for articles for the next issue, due September 1st. Many thanks to the authors and the correspondents who made this issue possible. -
Rainer Weiss, Professor of Physics Emeritus and 2017 Nobel Laureate
Giving to the Department of Physics by Erin McGrath RAINER WEISS ’55, PHD ’62 Bryce Vickmark Rai Weiss has established a fellowship in the Physics Department because he is eternally grateful to his advisor, the late Jerrold Zacharias, for all that he did for Rai, so he knows firsthand the importance of supporting graduate students. Rainer Weiss, Professor of Physics Emeritus and 2017 Nobel Laureate. Rainer “Rai” Weiss was born in Berlin, Germany in 1932. His father was a physician and his mother was an actress. His family was forced out of Germany by the Nazis since his father was Jewish and a Communist. Rai, his mother and father fled to Prague, Czecho- slovakia. In 1937 a sister was born in Prague. In 1938, after Chamberlain appeased Hitler by effectively giving him Czechoslovakia, the family was able to obtain visas to enter the United States through the Stix Family in St. Louis, who were giving bond to professional Jewish emigrants. When Rai was 21 years-old, he visited Mrs. Stix and thanked her for what she had done for his family. The family immigrated to New York City. Rai’s father had a hard time passing the medi- cal boards because of his inability to answer multiple choice exams. His mother, who Rai says “held the family together,” worked in a number of retail stores. Through the services of an immigrant relief organization Rai received a scholarship to attend the prestigious Columbia Grammar School. At the end of 1945, when Rai was 13 years old, he became fascinated with electronics and music. -
Quantum Aspects of Life / Editors, Derek Abbott, Paul C.W
Quantum Aspectsof Life P581tp.indd 1 8/18/08 8:42:58 AM This page intentionally left blank foreword by SIR ROGER PENROSE editors Derek Abbott (University of Adelaide, Australia) Paul C. W. Davies (Arizona State University, USAU Arun K. Pati (Institute of Physics, Orissa, India) Imperial College Press ICP P581tp.indd 2 8/18/08 8:42:58 AM Published by Imperial College Press 57 Shelton Street Covent Garden London WC2H 9HE Distributed by World Scientific Publishing Co. Pte. Ltd. 5 Toh Tuck Link, Singapore 596224 USA office: 27 Warren Street, Suite 401-402, Hackensack, NJ 07601 UK office: 57 Shelton Street, Covent Garden, London WC2H 9HE Library of Congress Cataloging-in-Publication Data Quantum aspects of life / editors, Derek Abbott, Paul C.W. Davies, Arun K. Pati ; foreword by Sir Roger Penrose. p. ; cm. Includes bibliographical references and index. ISBN-13: 978-1-84816-253-2 (hardcover : alk. paper) ISBN-10: 1-84816-253-7 (hardcover : alk. paper) ISBN-13: 978-1-84816-267-9 (pbk. : alk. paper) ISBN-10: 1-84816-267-7 (pbk. : alk. paper) 1. Quantum biochemistry. I. Abbott, Derek, 1960– II. Davies, P. C. W. III. Pati, Arun K. [DNLM: 1. Biogenesis. 2. Quantum Theory. 3. Evolution, Molecular. QH 325 Q15 2008] QP517.Q34.Q36 2008 576.8'3--dc22 2008029345 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. Photo credit: Abigail P. Abbott for the photo on cover and title page. Copyright © 2008 by Imperial College Press All rights reserved. This book, or parts thereof, may not be reproduced in any form or by any means, electronic or mechanical, including photocopying, recording or any information storage and retrieval system now known or to be invented, without written permission from the Publisher. -
Newsletter 2019 05 Kf
mkhdu3a.org.uk N E W S L E T T E R No. 71 May 2019 Dear Member After 71 issues of the newsletter, this is Mike signing off as Newsletter editor! At the AGM we have a member standing for the new Committee to take over the role for our June issue – but only if you elect him. Another reason to come along to our AGM! Of course you will also be able to listen to our nationally renowned speaker, Lucy Hawking. You will be able to hear a report from our Chair, the state of our finances, elect our new Committee, and much else. This Month Our AGM Speaker:.................................................................................................... 2 Our AGM................................................................................................................... 2 Lucy Hawking............................................................................................................ 3 Interest Group Update including a new group for our more active members.......... 4 Social Programme..................................................................................................... 4 University of Birmingham Lapworth Museum Tour.................................................... 5 Picture of the Month.................................................................................................. 6 Interest Group of the Month...................................................................................... 7 Our Web Site -a Request for Help............................................................................. 8 Forthcoming -
MATTERS of GRAVITY, a Newsletter for the Gravity Community, Number 4
MATTERS OF GRAVITY Number 4 Fall 1994 Table of Contents Editorial ................................................... ................... 2 Correspondents ................................................... ............ 2 Gravity news: Report on the APS Topical Group in Gravitation, Beverly Berger ............. 3 Research briefs: Gravitational Microlensing and the Search for Dark Matter: A Personal View, Bohdan Paczynski .......................................... 5 Laboratory Gravity: The G Mystery and Intrinsic Spin Experiments, Riley Newman ............................... 11 LIGO Project update, Stan Whitcomb ....................................... 15 Conference Reports: PASCOS ’94, Peter Saulson .................................................. 16 The Vienna meeting, P. Aichelburg, R. Beig .................................. 19 The Pitt Binary Black Hole Grand Challenge Meeting, Jeff Winicour ......... 20 International Symposium on Experimental Gravitation, Nathiagali, Pakistan, Munawar Karim ....................................... 22 arXiv:gr-qc/9409004v1 2 Sep 1994 10th Pacific Coast Gravity Meeting , Jim Isenberg ........................... 23 Editor: Jorge Pullin Center for Gravitational Physics and Geometry The Pennsylvania State University University Park, PA 16802-6300 Fax: (814)863-9608 Phone (814)863-9597 Internet: [email protected] 1 Editorial The newsletter strides on. I had to perform some pushing around and arm-twisting to get articles for this number. I wish to remind everyone that suggestions and ideas for contributions are especially welcome. The newsletter is growing rather weak on the theoretical side. Keep those suggestions coming! I put together this newsletter mostly on a palmtop computer while travelling, with some contributions arriving the very day of publication (on which, to complicate matters, I was giving a talk at a conference, my email reader crashed and our network went down). One of the contributions is a bit longer than the usual format. Again it is my fault for failing to warn the author in due time. -
Gravitational Waves WARNING!!!!
Gravitational Waves WARNING!!!! ⚫ Terminology is treacherous! ⚫ There are gravitational waves (our topic) and there are gravity waves (a topic for a surfing class). Mix them to your peril. Gravitational waves ⚫ Movie The History ⚫ The history of gravitational waves is rocky. Einstein argued in 1916 that gravitational waves must exist – if the space-time is dynamic, there must be ripples on it. ⚫ Einstein derived the approximate formula for the gravitational waves from two orbiting bodies. ⚫ In 1922 Eddington (that one) argued that gravitational waves were not real and just a mathematical artefact. The History ⚫ In 1936 Einstein wrote a paper with Nathan Rosen reversing his original view; they concluded that all gravitational waves should collapse into black holes. ⚫ The paper was submitted to Physics Review but was returned after the referee pointed out a mistake in it. ⚫ Einstein got berserk in response, writing an angry letter to the editor and promising never to publish in Physics Review again. The History ⚫ Einstein was later persuaded by Infeld of his mistake and corrected the paper. Rosen never conceded. ⚫ In 1957 Richard Feymann (a very famous particle physicist) presented a “sticky bead” argument that convinced most people that gravitational waves are real. The Challenge ⚫ The primary challenge with gravitational waves is that in GR there is no (unambiguous) mathematical expression for its energy. ⚫ Since locally space-time is Minkowski, in the local inertial reference frame the energy of gravitational waves is zero. I.e., that energy is non-local, one cannot claim that the energy of gravitational waves is … at his location, only that the total energy is such and such.