Chronicles Newsletter of the UCSD Emeriti Association
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The Taming of “49” Big Science in Little Time
The Taming of “49” Big science in little time Recollections of Edward F. Hammel During the Manhattan Project, plutonium was often referred to, simply, as 49. Number 4 was for the last digit in 94 (the atomic number of plutonium) and 9 for the last digit in plutonium-239, the isotope of choice for nuclear weapons. The story that unfolds was adapted from Plutonium Metallurgy at Los Alamos, 1943–1945, as Edward F. Hammel remembers the events of those years. 48 Los Alamos Science Number 26 2000 The Taming of “49” he work in plutonium chemistry tion work was an inevitable conse- the metal could be fabricated into and metallurgy carried out at quence of the nuclear and physical satisfactory weapon components. TLos Alamos (Site Y) between research that was still to be conducted In addition, not until January 1944 1943 and 1945 had a somewhat contro- on the metal. It would clearly have did the first few milligrams of pile- versial history. The controversy was been inefficient and time consuming to produced plutonium arrive at Los about who was going to do what. ship small amounts of plutonium metal Alamos. The first 1-gram shipment At the time Los Alamos was being back to Chicago for repurification and arrived in February 1944, and quantity organized, most of the expertise in plu- refabrication into different sizes and shipments of plutonium did not begin to tonium chemistry resided at Berkeley, shapes for the next-scheduled nuclear arrive at Los Alamos until May 1945. where plutonium was discovered in physics experiment. From the outset, it was clear that the December 1940, and at the Met Lab in Minimizing the time spent to solve purification of plutonium was the most Chicago. -
Is the Universe Expanding?: an Historical and Philosophical Perspective for Cosmologists Starting Anew
Western Michigan University ScholarWorks at WMU Master's Theses Graduate College 6-1996 Is the Universe Expanding?: An Historical and Philosophical Perspective for Cosmologists Starting Anew David A. Vlosak Follow this and additional works at: https://scholarworks.wmich.edu/masters_theses Part of the Cosmology, Relativity, and Gravity Commons Recommended Citation Vlosak, David A., "Is the Universe Expanding?: An Historical and Philosophical Perspective for Cosmologists Starting Anew" (1996). Master's Theses. 3474. https://scholarworks.wmich.edu/masters_theses/3474 This Masters Thesis-Open Access is brought to you for free and open access by the Graduate College at ScholarWorks at WMU. It has been accepted for inclusion in Master's Theses by an authorized administrator of ScholarWorks at WMU. For more information, please contact [email protected]. IS THEUN IVERSE EXPANDING?: AN HISTORICAL AND PHILOSOPHICAL PERSPECTIVE FOR COSMOLOGISTS STAR TING ANEW by David A Vlasak A Thesis Submitted to the Faculty of The Graduate College in partial fulfillment of the requirements forthe Degree of Master of Arts Department of Philosophy Western Michigan University Kalamazoo, Michigan June 1996 IS THE UNIVERSE EXPANDING?: AN HISTORICAL AND PHILOSOPHICAL PERSPECTIVE FOR COSMOLOGISTS STARTING ANEW David A Vlasak, M.A. Western Michigan University, 1996 This study addresses the problem of how scientists ought to go about resolving the current crisis in big bang cosmology. Although this problem can be addressed by scientists themselves at the level of their own practice, this study addresses it at the meta level by using the resources offered by philosophy of science. There are two ways to resolve the current crisis. -
Fleming Vs. Florey: It All Comes Down to the Mold Kristin Hess La Salle University
The Histories Volume 2 | Issue 1 Article 3 Fleming vs. Florey: It All Comes Down to the Mold Kristin Hess La Salle University Follow this and additional works at: https://digitalcommons.lasalle.edu/the_histories Part of the History Commons Recommended Citation Hess, Kristin () "Fleming vs. Florey: It All Comes Down to the Mold," The Histories: Vol. 2 : Iss. 1 , Article 3. Available at: https://digitalcommons.lasalle.edu/the_histories/vol2/iss1/3 This Paper is brought to you for free and open access by the Scholarship at La Salle University Digital Commons. It has been accepted for inclusion in The iH stories by an authorized editor of La Salle University Digital Commons. For more information, please contact [email protected]. The Histories, Vol 2, No. 1 Page 3 Fleming vs. Florey: It All Comes Down to the Mold Kristen Hess Without penicillin, the world as it is known today would not exist. Simple infections, earaches, menial operations, and diseases, like syphilis and pneumonia, would possibly all end fatally, shortening the life expectancy of the population, affecting everything from family-size and marriage to retirement plans and insurance policies. So how did this “wonder drug” come into existence and who is behind the development of penicillin? The majority of the population has heard the “Eureka!” story of Alexander Fleming and his famous petri dish with the unusual mold growth, Penicillium notatum. Very few realize that there are not only different variations of the Fleming discovery but that there are also other people who were vitally important to the development of penicillin as an effective drug. -
The Physical Tourist Physics and New York City
Phys. perspect. 5 (2003) 87–121 © Birkha¨user Verlag, Basel, 2003 1422–6944/05/010087–35 The Physical Tourist Physics and New York City Benjamin Bederson* I discuss the contributions of physicists who have lived and worked in New York City within the context of the high schools, colleges, universities, and other institutions with which they were and are associated. I close with a walking tour of major sites of interest in Manhattan. Key words: Thomas A. Edison; Nikola Tesla; Michael I. Pupin; Hall of Fame for GreatAmericans;AlbertEinstein;OttoStern;HenryGoldman;J.RobertOppenheimer; Richard P. Feynman; Julian Schwinger; Isidor I. Rabi; Bronx High School of Science; StuyvesantHighSchool;TownsendHarrisHighSchool;NewYorkAcademyofSciences; Andrei Sakharov; Fordham University; Victor F. Hess; Cooper Union; Peter Cooper; City University of New York; City College; Brooklyn College; Melba Phillips; Hunter College; Rosalyn Yalow; Queens College; Lehman College; New York University; Courant Institute of Mathematical Sciences; Samuel F.B. Morse; John W. Draper; Columbia University; Polytechnic University; Manhattan Project; American Museum of Natural History; Rockefeller University; New York Public Library. Introduction When I was approached by the editors of Physics in Perspecti6e to prepare an article on New York City for The Physical Tourist section, I was happy to do so. I have been a New Yorker all my life, except for short-term stays elsewhere on sabbatical leaves and other visits. My professional life developed in New York, and I married and raised my family in New York and its environs. Accordingly, writing such an article seemed a natural thing to do. About halfway through its preparation, however, the attack on the World Trade Center took place. -
The Expert Panel on the Socio-Economic Impacts of Innovation Investments
INNOVATION IMPACTS: MEASUREMENT AND ASSESSMENT The Expert Panel on the Socio-economic Impacts of Innovation Investments Science Advice in the Public Interest INNOVATION IMPACTS: MEASUREMENT AND ASSESSMENT The Expert Panel on the Socio-economic Impacts of Innovation Investments ii Innovation Impacts: Measurement and Assessment THE COUNCIL OF CANADIAN ACADEMIES 180 Elgin Street, Suite 1401, Ottawa, ON Canada K2P 2K3 Notice: The project that is the subject of this report was undertaken with the approval of the Board of Governors of the Council of Canadian Academies. Board members are drawn from the Royal Society of Canada (RSC), the Canadian Academy of Engineering (CAE), and the Canadian Academy of Health Sciences (CAHS), as well as from the general public. The members of the expert panel responsible for the report were selected by the Council for their special competencies and with regard for appropriate balance. This report was prepared in response to a request from the Ontario Ministry of Research and Innovation. Any opinions, findings, or conclusions expressed in this publication are those of the authors, the Expert Panel on the Socio-economic Impacts of Innovation Investments, and do not necessarily represent the views of their organizations of affiliation or employment. Library and Archives Canada Cataloguing in Publication Innovation impacts: measurement and assessment [electronic resource] : socio-economic impacts of innovation investments of the government of Ontario/ Council of Canadian Academies. Includes bibliographical references and index. Electronic monograph in PDF format. Issued also in print format. ISBN 978-1-926558-58-5 1. Public investments – Ontario – Measurement. 2. Public investments – Ontario – Evaluation. 3. Technological innovations – Government policy – Ontario. -
The Role of Language in Learning Physics
THE ROLE OF LANGUAGE IN LEARNING PHYSICS BY DAVID T. BROOKES A dissertation submitted to the Graduate School—New Brunswick Rutgers, The State University of New Jersey in partial fulfillment of the requirements for the degree of Doctor of Philosophy Graduate Program in Physics and Astronomy Written under the direction of Prof. Eugenia Etkina and approved by New Brunswick, New Jersey October, 2006 c 2006 David T. Brookes ALL RIGHTS RESERVED ABSTRACT OF THE DISSERTATION The Role of Language in Learning Physics by David T. Brookes Dissertation Director: Prof. Eugenia Etkina Many studies in PER suggest that language poses a serious difficulty for students learn- ing physics. These difficulties are mostly attributed to misunderstanding of specialized terminology. This terminology often assigns new meanings to everyday terms used to describe physical models and phenomena. In this dissertation I present a novel ap- proach to analyzing of the role of language in learning physics. This approach is based on the analysis of the historical development of physics ideas, the language of modern physicists, and students’ difficulties in the areas of quantum mechanics, classical me- chanics, and thermodynamics. These data are analyzed using linguistic tools borrowed from cognitive linguistics and systemic functional grammar. Specifically, I combine the idea of conceptual metaphor and grammar to build a theoretical framework that accounts for • the role and function that language serves for physicists when they speak and reason about physical ideas and phenomena, • specific features of students’ reasoning and difficulties that may be related to or derived from language that students read or hear. ii The theoretical framework is developed using the methodology of a grounded theo- retical approach. -
William Aaron Nierenberg Feb. 13,1919
William Aaron Nierenberg Feb. 13,1919- William Aaron Nierenberg was born on February 13, 1919 at 228 E. 13th St. in New York City on what was then the Lower East Side -- it is now the "East Village". While it is true that his father and his father's family had lived on the Lower East Side (Houston Street) when they had emigrated to America (his father in 1906), it was an accident that his birthplace was there. His parents, Joseph and Minnie (Drucker) had moved to Manhattan from the Bronx to be near the Sloan Lying in Hospital for his birth. His parents had lost their first infant child to tuberculosis of the brain from tainted milk and his mother was naturally very nervous about the new child's safety. He only lived in Manhattan for the next four months and the rest of his years in New York City, both before and after his marriage, were spent in the Bronx except for time in Paris as a physics student. There is essentially no specific knowledge of his antecedents. His paternal grandfather's given name was Hirsch and his paternal grandmother's name was Bertha. He had no knowledge whatsoever of his maternal forebears. His parent's gravestone showed his grandfather (therefore his father and he himself) to be a Levi, of the tribe blessed by the Lord. His mother's gravestone describes her as a "daughter of Abraham" since her antecedents were unknown to the burial society. (Many years later. most surprisingly, her birth certificate showed up! This is the one that Aba's daughter gave me a copy of. -
Robert Hofstadter 1915–1990
NATIONAL ACADEMY OF SCIENCES ROBERT HOFSTADTER 1915–1990 A Biographical Memoir by JEROME I. FRIEDMAN AND WILLIAM A. LITTLE Any opinions expressed in this memoir are those of the authors and do not necessarily reflect the views of the National Academy of Sciences. Biographical Memoirs, VOLUME 79 PUBLISHED 2001 BY THE NATIONAL ACADEMY PRESS WASHINGTON, D.C. ROBERT HOFSTADTER February 5, 1915–November 17, 1990 BY JEROME I. FRIEDMAN AND WILLIAM A. LITTLE OBERT HOFSTADTER WAS BORN in New York City, educated R on the East Coast, but spent most of his academic ca- reer at Stanford University. He is best known for his work on determining the distribution of charge and magnetic moment in the nuclei of atoms and of the nucleons them- selves, for which he was awarded a Nobel Prize in 1961. He extended the work done in the early part of the twentieth century by Ernest Rutherford, who had shown that atoms were composite, containing electrons and a nucleus many thousands of times smaller than the atom. Rutherford dis- covered this by scattering alpha particles from thin metal foils of the elements and measuring the number of par- ticles scattered as a function of the angle. The surprisingly large number of particles that were scattered through large angles could only be explained by collisions with a heavy, very small, perhaps point-like, positively charged object, which he called the nucleus. Some 40 years later Hofstadter determined the internal structure of such nuclei by scattering high-energy electrons from thin targets and measuring the distribution of the number of these electrons as a function of angle. -
The Bradbury Years 1943-1945
THE n late 1945 a small group of courageous and loyal scientists and technicians undertook to continue the post-war operation of the Los Alamos Scientific Laboratory. These men believed that atomic weapons development had barely begun, that other countries would develop such weapons, and that the safety and security of the United States-if not of the world-depended upon the technical lead of this country. These men had the courage to stay at Los Alamos in the face of an uncertain future. These men did not make demands nor require promises. These men stayed and built the greatest weapons laboratory this country has ever known. These men stayed and developed the greatest array of powerful and flexible atomic weapons of any country in the world-developed them faster, developed them where they were urgently needed and requested by the Armed Forces-developed them to fit the productive resources of the newly established Atomic Energy Commission. They stayed and built a laboratory that developed every successfuZ thermonuclear weapon that exists today. Others left, but these men stayed and worked, and many others came to join them. LOS ALAMOS SCIENCE WinterISpring 1983 What these men accomplished cannot be told in detail, for these its developments while it was further expanding its scientific staff. facts are classified TOP SECRET. These men do not talk. They Had the Laboratory attempted to exploit the thermonuclear field believe in deeds, not words. But these deeds earned for the Los to the exclusion of the fission field in 1946, what would have Alamos Scientific Laboratory the only Presidential Citation ever happened? Hypothetical history can only be an educated guess, but awarded to any laboratory for its extraordinary success in the the guess in this case is almost certain. -
Can Nuclear Weapons Fallout Mark the Beginning of the Anthropocene
Feature Bulletin of the Atomic Scientists 2015, Vol. 71(3) 46–57 ! The Author(s) 2015 Reprints and permissions: Can nuclear weapons fallout sagepub.co.uk/journalsPermissions.nav DOI: 10.1177/0096340215581357 mark the beginning of the http://thebulletin.sagepub.com Anthropocene Epoch? Colin N. Waters, James P. M. Syvitski, Agnieszka Gałuszka, Gary J. Hancock, Jan Zalasiewicz, Alejandro Cearreta, Jacques Grinevald, Catherine Jeandel, J. R. McNeill, Colin Summerhayes, and Anthony Barnosky Abstract Many scientists are making the case that humanity is living in a new geological epoch, the Anthropocene, but there is no agreement yet as to when this epoch began. The start might be defined by a historical event, such as the beginning of the fossil-fueled Industrial Revolution or the first nuclear explosion in 1945. Standard strati- graphic practice, however, requires a more significant, globally widespread, and abrupt signature, and the fallout from nuclear weapons testing appears most suitable. The appearance of plutonium 239 (used in post- 1945 above-ground nuclear weapons tests) makes a good marker: This isotope is rare in nature but a significant component of fallout. It has other features to recommend it as a stable marker in layers of sedimentary rock and soil, including: long half-life, low solubility, and high particle reactivity. It may be used in conjunction with other radioactive isotopes, such as americium 241 and carbon 14, to categorize distinct fallout signatures in sediments and ice caps. On a global scale, the first appearance of plutonium 239 in sedimentary sequences corresponds to the early 1950s. While plutonium is easily detectable over the entire Earth using modern meas- urement techniques, a site to define the Anthropocene (known as a Ògolden spikeÓ) would ideally be located between 30 and 60 degrees north of the equator, where fallout is maximal, within undisturbed marine or lake environments. -
Robert Hofstadter Papers SC0426
http://oac.cdlib.org/findaid/ark:/13030/kt458037nx Online items available Guide to the Robert Hofstadter Papers SC0426 Ashley McDonnell Lawyer, Aimee Morgan, & Jenny Johnson This collection was processed with support from the American Institute of Physics' Grants to Archives Program. Department of Special Collections and University Archives January 2012 Green Library 557 Escondido Mall Stanford 94305-6064 [email protected] URL: http://library.stanford.edu/spc Note This encoded finding aid is compliant with Stanford EAD Best Practice Guidelines, Version 1.0. Guide to the Robert Hofstadter SC0426 1 Papers SC0426 Language of Material: English Contributing Institution: Department of Special Collections and University Archives Title: Robert Hofstadter papers creator: Hofstadter, Robert Identifier/Call Number: SC0426 Physical Description: 83.75 Linear Feet(66 boxes) Date (inclusive): 1931-1993 Abstract: This collection contains the papers of former Stanford professor and Nobel Prize winning physicist Robert Hofstadter. Included are lab notebooks and research data; lecture notes and teaching materials; writings, drafts, and reprints; grant proposals; incoming and outgoing correspondence; travel and conference papers; legal papers; biographical and personal materials;clippings; photographs; and a small amount of audiovisual material. The papers cover a wide swath of Hofstadter's career, including his student and postgraduate work at Princeton University; wartime positions at The United States National Bureau of Standards and Norden Laboratory; Stanford research including electron scattering and coronary angiography; and his collaboration with NASA personnel on the Energetic Gamma-Ray Experiment Telescope (EGRET). Arrangement The papers are arranged in four accessions, mirroring how the collection was received. One additional catagory, Oversized Items, was created during processing and consists of large items removed from elsewhere in the collection. -
The July 1945 Szilard Petition on the Atomic Bomb
1 The July 1945 Szilard Petition on the Atomic Bomb Memoir by a signer in Oak Ridge Howard Gest Distinguished Professor Emeritus of Microbiology, Departments of Biology, and History & Philosophy of Science, Indiana University, Bloomington, IN 47405 2 Well before the first test of a nuclear explosive device at Alamogordo (New Mexico) on July 16, 1945, many scientists of the Manhattan (Atomic Bomb) Project were very concerned about how nuclear bombs might be used in World War II. Meetings were held at the University of Chicago site and at Oak Ridge (Tennessee) to discuss the future of atomic energy and its political implications. As a result, a petition originated by Leo Szilard and addressed to President Truman in July 1945 discussed the moral responsibilities involved in using nuclear weapons. It recommended that such bombs not be used against Japan “unless the terms which will be imposed upon Japan have been made public in detail and Japan knowing these terms has refused to surrender.” The Szilard petition was displayed during 1989/1990 in a special exhibition at the National Archives in Washington, D.C. This article explains how I happened to be in Oak Ridge, where I signed the petition, and examines its background and complex, unfortunate history. From bacteriology to nuclear chemistry After graduating from the University of California at Los Angeles (UCLA) in 1942, with a major in bacteriology, I began graduate work with Max Delbrück at Vanderbilt University in Nashville, Tennessee (Delbrück was awarded a Nobel Prize in 1969 for his research on bacterial viruses). Because of the increasing intensity of World War II in 1942, however, research in universities was grinding to a halt.