1918 May 11. Richard Phillips Feynman Is Born in Manhattan To
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Simulating Physics with Computers
International Journal of Theoretical Physics, VoL 21, Nos. 6/7, 1982 Simulating Physics with Computers Richard P. Feynman Department of Physics, California Institute of Technology, Pasadena, California 91107 Received May 7, 1981 1. INTRODUCTION On the program it says this is a keynote speech--and I don't know what a keynote speech is. I do not intend in any way to suggest what should be in this meeting as a keynote of the subjects or anything like that. I have my own things to say and to talk about and there's no implication that anybody needs to talk about the same thing or anything like it. So what I want to talk about is what Mike Dertouzos suggested that nobody would talk about. I want to talk about the problem of simulating physics with computers and I mean that in a specific way which I am going to explain. The reason for doing this is something that I learned about from Ed Fredkin, and my entire interest in the subject has been inspired by him. It has to do with learning something about the possibilities of computers, and also something about possibilities in physics. If we suppose that we know all the physical laws perfectly, of course we don't have to pay any attention to computers. It's interesting anyway to entertain oneself with the idea that we've got something to learn about physical laws; and if I take a relaxed view here (after all I'm here and not at home) I'll admit that we don't understand everything. -
Wiki Template-1Eb7p59
Wikipedia Reader https://en.wikipedia.org/wiki/Aurora Selected by Julie Madsen - Entry 10 1 Aurora From Wikipedia, the free encyclopedia An aurora, sometimes referred to as a polar lights or north- ern lights, is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions.[1] Au- roras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (ther- mosphere/exosphere), where their energy is lost. The resulting ion- ization and excitation of atmospheric constituents emits light of varying color and complexity. The form of the aurora, occur- ring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating parti- cles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton Images of auroras from around the world, auroras are usually observed at including those with rarer red and blue lower latitudes.[2] lights Wikipedia Reader 2 May 1 2017 Contents 1 Occurrence of terrestrial auroras 1.1 Images 1.2 Visual forms and colors 1.3 Other auroral radiation 1.4 Aurora noise 2 Causes of auroras 2.1 Auroral particles 2.2 Auroras and the atmosphere 2.3 Auroras and the ionosphere 3 Interaction of the solar wind with Earth 3.1 Magnetosphere 4 Auroral particle acceleration 5 Auroral events of historical significance 6 Historical theories, superstition and mythology 7 Non-terrestrial auroras 8 See also 9 Notes 10 References 11 Further reading 12 External links Occurrence of terrestrial auroras Most auroras occur in a band known as the auroral zone,[3] which is typically 3° to 6° wide in latitude and between 10° and 20° from the geomagnetic poles at all local times (or longitudes), most clearly seen at night against a dark sky. -
Feynman-Richard-P.Pdf
A Selected Bibliography of Publications by, and about, Richard Phillips Feynman Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 07 June 2021 Version 1.174 Title word cross-reference $14.95 [Oni15]. $15 [Ano54b]. $18.00 [Dys98]. $19.99 [Oni15]. 2 + 1 [Fey81, Fey82c]. $22.00 [Dys98]. $22.95 [Oni15]. $24.95 [Dys11a, RS12]. $26.00 [Bro06, Ryc17, Dys05]. $29.99 [Oni15, Roe12, Dys11a]. $30.00 [Kra08, Lep07, W¨ut07]. $35 [Ano03b]. $50.00 [DeV00, Ano99]. $500 [Ano39]. $55.00 [Noe11]. $80.00hb/$30.00pb [Cao06]. $9.95 [Oni15]. α [GN87, Sla72]. e [BC18]. E = mc2 [KN19]. F (t) · r [BS96]. λ [Fey53c, Fey53a]. SU(3) [Fey65a]. U(6) ⊗ U(6) [FGMZ64]. π [BC18]. r [EFK+62]. -Transition [Fey53a]. 0-19-853948-7 [Tay97]. 0-226-42266-6 [W¨ut07]. 0-226-42267-4 [Kra08]. 0-691-03327-7 [Bro96c]. 0-691-03685-3 [Bro96c]. 1965 [Fey64e]. 1988 [Meh02]. 1 2 2.0 [BCKT09]. 2002 [FRRZ04]. 2007 [JP08]. 2010 [KLR13]. 20th [Anoxx, Bre97, Gin01, Kai02]. 235 [FdHS56]. 3 [Ish19, Ryc17]. 3.0 [Sem09]. 3.2 [Sem16]. 40th [MKR87]. 469pp [Cao06]. 8 [Roe12]. 9 [BFB82]. 978 [Ish19, Roe12, Ryc17]. 978-0-06135-132-7 [Oni15]. 978-0-300-20998-3 [Ryc17]. 978-0-8090-9355-7 [Oni15]. 978-1-58834-352-9 [Oni15]. -
The Boundaries of Nature: Special & General Relativity and Quantum
“The Boundaries of Nature: Special & General Relativity and Quantum Mechanics, A Second Course in Physics” Edwin F. Taylor's acceptance speech for the 1998 Oersted medal presented by the American Association of Physics Teachers, 6 January 1998 Edwin F. Taylor Center for Innovation in Learning, Carnegie Mellon University, Pittsburgh, PA 15213 (Now at 22 Hopkins Road, Arlington, MA 02476-8109, email [email protected] , web http://www.artsaxis.com/eftaylor/ ) ABSTRACT Public hunger for relativity and quantum mechanics is insatiable, and we should use it selectively but shamelessly to attract students, most of whom will not become physics majors, but all of whom can experience "deep physics." Science, engineering, and mathematics students, indeed anyone comfortable with calculus, can now delve deeply into special and general relativity and quantum mechanics. Big chunks of general relativity require only calculus if one starts with the metric describing spacetime around Earth or black hole. Expressions for energy and angular momentum follow, along with orbit predictions for particles and light. Feynman's Sum Over Paths quantum theory simply commands the electron: Explore all paths. Students can model this command with the computer, pointing and clicking to tell the electron which paths to explore; wave functions and bound states arise naturally. A second full year course in physics covering special relativity, general relativity, and quantum mechanics would have wide appeal -- and might also lead to significant advancements in upper-level courses for the physics major. © 1998 American Association of Physics Teachers INTRODUCTION It is easy to feel intimidated by those who have in the past received the Oersted Medal, especially those with whom I have worked closely in the enterprise of physics teaching: Edward M. -
Interplanetary Magnetic Field Control of the Entry of Solar Energetic Particles Into the Magnetosphere R
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 107, NO. A8, 1184, 10.1029/2001JA000099, 2002 Interplanetary magnetic field control of the entry of solar energetic particles into the magnetosphere R. L. Richard, M. El-Alaoui, M. Ashour-Abdalla,1 and R. J. Walker2 Institute of Geophysics and Planetary Physics, University of California at Los Angeles, Los Angeles, California, USA Received 2 April 2001; revised 6 February 2002; accepted 18 March 2002; published 15 August 2002. [1] We have investigated the entry of energetic ions of solar origin into the magnetosphere as a function of the interplanetary magnetic field orientation. We have modeled this entry by following high energy particles (protons and 3He ions) ranging from 0.1 to 50 MeV in electric and magnetic fields from a global magnetohydrodynamic (MHD) model of the magnetosphere and its interaction with the solar wind. For the most part these particles entered the magnetosphere on or near open field lines except for some above 10 MeV that could enter directly by crossing field lines due to their large gyroradii. The MHD simulation was driven by a series of idealized solar wind and interplanetary magnetic field (IMF) conditions. It was found that the flux of particles in the magnetosphere and transport into the inner magnetosphere varied widely according to the IMF orientation for a constant upstream particle source, with the most efficient entry occurring under southward IMF conditions. The flux inside the magnetosphere could approach that in the solar wind implying that SEPs can contribute significantly to the magnetospheric energetic particle population during typical SEP events depending on the state of the magnetosphere. -
APS News, March 2018, Vol. 27, No. 3
March 2018 • Vol. 27, No. 3 A PUBLICATION OF THE AMERICAN PHYSICAL SOCIETY New Members of the PhysTEC 5+ Club APS.ORG/APSNEWS Page 3 2018 APS April Meeting: “Hello, Columbus” Physical Review B: Condensed Attendees in fields from Matter, Then and Now “Quarks to the Cosmos,” includ- ing particle physics, nuclear phys- ics, astrophysics, and gravitation, Getty Images will gather in Columbus, Ohio, April 14–17, at the Columbus Convention Center for the 2018 APS April Meeting. The meeting theme this year is “A Feynman Century,” marking the 100th By Sarma Kancharla and Laurens lished by APS offers a chance to anniversary of the Nobel-winning Molenkamp look back at some of the landmark physicist’s birth with a Kavli The late Peter Adams, found- publications that have led to PRB Foundation Plenary Session and ing editor of Physical Review B becoming not only the largest an invited session on his legacy. (PRB), impishly used to say that journal in all of physics but also a venue for excellence. The Kavli session will be held the journal was created in 1970 on Saturday, April 14 (8:30 a.m.) because The Physical Review and will feature a presentation by had reached its binding limit. Joan Feynman (Jet Propulsion Lab, Forum on the History of Physics Professional Skills Development Apocryphal as that sounds, the retired) on life with her brother invited session on Monday, April Workshop for Women on persua- birth of PRB couldn't have hap- Richard and her concerns about cli- 16 (room B130) at 1:30 p.m., with sive communication, negotiation, mate change. -
Concerning Relativity Books. Published in June 2013 INTERVIEW WITH
Interview for Hungarian “Physical Review” concerning relativity books. Published in June 2013 INTERVIEW WITH EDWIN F. TAYLOR, SENIOR RESEARCH SCIENTIST, EMERITUS AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY (FSZ: Fizikai Szemle, EFT: Edwin F. Taylor) FSZ: Spacetime Physics, the book you co-authored with John Archibald Wheeler, has many fans among physicists throughout the world, and Hungary is no exception. (The Hungarian edition was first published in 1974; the second printing of this edition came out in 2006 [1].) In 1972 you published an account of your collaboration with John Wheeler on the 1963 edition of Spacetime Physics and your personal impressions about John Wheeler (including his emotional reaction to the news of his mentor Niels Bohr’s death in November 1962) [2]. Your collaboration and friendship with Wheeler started during your sabbatical at Princeton University in 1962. One of your assignments was to prepare lecture notes for a freshman physics course that Wheeler taught to a class of 35 students. He started the course with 6 weeks of relativity! What had been your main areas of interest in physics before you met John Wheeler? Had you been particularly interested in relativity, or was it Wheeler’s presentation of it during that introductory physics course in 1962 which made it a lifelong passion for you? EFT: My father, Lloyd W. Taylor, was a physics textbook writer, so it came naturally to me. My first book, Introductory Mechanics, arrived from the publisher when I was on a junior faculty sabbatical at Princeton University; that book included some chapters on special relativity. Wheeler arranged for me to assist him in this honors introductory class [3]. -
Causes of Extremely Fast Cmes
Solar Activity and its Magnetic Origin Proceedings IAU Symposium No. 233, 2006 c 2006 International Astronomical Union V. Bothmer & A. A. Hady, eds. doi:10.1017/S1743921306002146 Causes of extremely fast CMEs Joan Feynman and Alexander Ruzmaikin Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA email: [email protected] Abstract. We study CMEs observed by LASCO to have plane of the sky velocities exceeding 1500 km/sec. We find that these extremely fast CMEs are typically associated with flares ac- companied by erupting prominences. Our results are consistent with a single CME initiation process that consists of three stages. The initial stage is brought about by the emergence of new magnetic flux, which interacts with the pre-existing magnetic configuration and results in a slow rise of the magnetic structure. The second stage is a fast reconnection phase with flaring, filament eruption and a sudden increase of the rise velocity of the magnetic structure (CME). The third stage consists of propagation in the corona. We discuss the sources of these CMEs and the need for improved understanding of the first and third stages. Keywords. Sun:coronal mass ejections (CMEs), Sun: prominences, Sun: flares, Sun: magnetic fields 1. Introduction The distribution of the plane of the sky velocities of CMEs observed by SOHO is showninFigure1(Yurchyshynet al., 2005). This distribution of 4315 CMEs shows few CMEs with velocities greater than 1500 km/sec and none with velocities exceeding 2000 km/sec. However these are the CMEs that cause the most important solar energetic particle events and the most intense geomagnetic storms. -
John Archibald Wheeler 1911 – 2008
John Archibald Wheeler 1911 – 2008 Peter Aufmuth Albert-Einstein-Institut Institut für Gravitationsphysik Leibniz Universität Hannover 9. Juli 2008 Kollegen über Wheeler Max Tegmark Die Geschichte wird JAW als einen Einige seiner Konzepte der überragenden sind so radikal, daß man Geister des 20. ihnen nicht gerecht wird, Jahrhunderts wenn man sie beurteilen. „revolutionär“ nennt. Für mich war er der letzte Titan, der einzige noch lebende Superheld der Physik. Paul C.W. Davies Anton Zeilinger Leben & Werk Jugend & Studium Geb. am 9. Juli 1911 in Jackson, FL als erstes von vier Kindern. Eltern: Joseph & Mabel Wheeler (Bibliothekar & Hausfrau). Häufige Umzüge: Florida, Kalifornien, Ohio, Washington, D.C., Maryland und Vermont. JAW beginnt das Studium an der Johns Hopkins University mit 16 und promoviert mit 21 Jahren bei Karl Ferdinand Herzfeld. „Dispersion and Absorption of He“ Dissertation 1932; Phys. Rev. (Jan. 1933) Mit 27 Jahren wird er als Professor nach Princeton berufen. Leben & Werk Akademische Karriere 1938 – 76 Prof. of Physics, Princeton University 1976 – 86 Center for Theoretical Physics University of Texas, Austin seit 1986 Joseph Henry Prof. of Physics Emeritus Princeton University Princeton Austin Leben & Werk Wissenschaftliche Karriere 1933 – 34 Arbeit mit Gegory Breit, NYU 1934 – 35 Arbeit mit Bohr, Kopenhagen 1935 – 38 Assistent Prof., UNC 1937 – 38 Arbeit mit Edward Teller 1938 – 39 Arbeit mit Willis Lamb 1945 Gründer & Direktor des Cosmic Ray Lab, Princeton 1952 – 55 Diskussionen mit Einstein Mitgliedschaften: American Physical Society (Präsident) American Philosophical Society Royal Academy Accademia Nazionale dei Lincei Royal Academy of Sciences Leben & Werk Auszeichnungen Enrico Fermi Award 1968 Franklin Medal 1969 National Medal of Science 1970 Niels Bohr Int. -
Edward P. Richards, the Lessons of Human Adaptation to Climate
RICHARDS - FINAL WORD (DO NOT DELETE) 11/30/2018 11:02 AM 18 Hous. J. Health L. & Pol’y 131 Copyright © 2018 Edward P. Richards Houston Journal of Health Law & Policy THE SOCIETAL IMPACTS OF CLIMATE ANOMALIES DURING THE PAST 50,000 YEARS AND THEIR IMPLICATIONS FOR SOLASTALGIA AND ADAPTATION TO FUTURE CLIMATE CHANGE1 Edward P. Richards INTRODUCTION................................................................................................ 132 I. PRE-SCIENTIFIC KNOWLEDGE OF THE NATURAL WORLD .......................... 134 II. UNDERSTANDING CLIMATE CHANGE AND CLIMATE ANOMALIES .......... 140 III. MEDIEVAL WARM PERIOD/MEDIEVAL CLIMATE ANOMALY IN THE AMERICAS ............................................................................................ 146 IV. IMPACT OF POST-LAST GLACIAL MAXIMUM SEA LEVEL RISE ................. 150 V. THE NEW THREAT: HEAT........................................................................... 154 VI. SENSE OF PLACE AND CLIMATE CHANGE DRIVEN MIGRATION ............. 158 VII. SOLASTALGIA AND FUTURE ENVIRONMENTAL RISK .............................. 164 CONCLUSION ................................................................................................... 167 1 This paper does not deal with mitigating global warming and ocean acidification through limiting carbon dioxide and other greenhouse gases. It also does not deal with potential con- sequences of ocean acidification. RICHARDS - FINAL WORD (DO NOT DELETE) 11/30/2018 11:02 AM 132 HOUS. J. HEALTH L. & POL’Y INTRODUCTION The earth is warming, local -
Early Prediction of Geomagnetic Storms (And Other Space Weather Hazards) Abstract Introduction
1 Early Prediction of GeomagneticStorms (andOther Space WeatherHazards) David H. Collins and Joan Feynman Jet Propulsion Laboratory, California Institute of Technology Abstract A detailed conceptual design has been developed for a mission and microspacecraft that can provide information needed to answer key questions about the physics of space weather and also both provide and validate a system for early warning of hazardous space weather. A single small launch vehicleand individually tailored Venus gravity assists disperse nine microspacecraft in a 0.53-0.85 AU band around the Sun. Collectively, the microspacecraft can investigate large-scale organization of coronal mass ejections (CMEs) andparticle acceleration mechanisms near their shocks. Radial and longitudinaldependencies, magnetohydrodynamic (MHD) turbulence in the solar wind, and variations in solar wind velocities and densities can allbe studied.Simultaneously, at least one of themicrospacecraft is nearthe Sun-Earthline almost continuously and can be monitored for earlywarning of hazardous space weather. Introduction In their paper, “On Space Weather Consequences and Predictions,” Feynman and Gabriel [2000]conclude that an important next step in thedevelopment of the understanding and prediction of hazardous space weather is to observe CMEs at 2 heliocentric distances significantly less than 1 AU and along the Sun-Earth line. These observations are needed to test interplanetary shock acceleration and release models for protons and ions with energies >10 MeV and to provide improved long- lead-time predictions of geomagnetic storms. High-velocity CMEs cause geomagnetic storms [Tsurutani and Gonzalez, 19971 and energetic particle events [Kahler et a/., 1984; Gosling, 19931 that present major hazards to both space systems and humans in space [Feynmanand Gabriel, 20001. -
FOR IMMEDIATE RELEASE Nobel Laureate George F. Smoot Recognized for Outstanding Leadership in Physics Education
FOR IMMEDIATE RELEASE College Park, Maryland, United States, November 19, 2008 Nobel Laureate George F. Smoot Recognized for Outstanding Leadership in Physics Education The American Association of Physics Teachers (AAPT) announced today that the Oersted Medal will be awarded to George F. Smoot, Nobel Laureate, an astrophysicist at Lawrence Berkeley National Laboratory since 1974 and a University of California at Berkeley physics professor since 1994, in recognition of his outstanding, widespread, and lasting impact on the teaching of physics. The Oersted Medal will be presented to Dr. Smoot at a Ceremonial Session of the AAPT Winter Meeting in Chicago, Illinois, on Saturday, February 14, 2009. Following the presentation, Dr. Smoot will deliver his keynote address titled, “The History and Fate of the Universe.” Regarding the award, Smoot stated, “ Thank you for this esteemed award. I am honored to be part of this recognized group of scientists. It is special to me since I recently taught my freshman physics class about Oersted’s discovery that electric currents cause magnetic fields. It is wonderful to show the relation between teaching and research. The past two years have been very memorable and exciting for me, and this award is part of that process. I hope that my contribution will help pave the way for the next generation and for their teachers.’’ Dr. Harvey Leff, Chairman, AAPT Awards Committee, said, “It is a great honor to present the Oersted Medal to Dr. George Smoot, who has measured properties of the universe as it existed nearly 14 billion years ago. His detailed study of fluctuations in the cosmic background radiation has led to an understanding of why galaxies formed as they did.