History of the Max Planck Society
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Hendrik Antoon Lorentz's Struggle with Quantum Theory A. J
Hendrik Antoon Lorentz’s struggle with quantum theory A. J. Kox Archive for History of Exact Sciences ISSN 0003-9519 Volume 67 Number 2 Arch. Hist. Exact Sci. (2013) 67:149-170 DOI 10.1007/s00407-012-0107-8 1 23 Your article is published under the Creative Commons Attribution license which allows users to read, copy, distribute and make derivative works, as long as the author of the original work is cited. You may self- archive this article on your own website, an institutional repository or funder’s repository and make it publicly available immediately. 1 23 Arch. Hist. Exact Sci. (2013) 67:149–170 DOI 10.1007/s00407-012-0107-8 Hendrik Antoon Lorentz’s struggle with quantum theory A. J. Kox Received: 15 June 2012 / Published online: 24 July 2012 © The Author(s) 2012. This article is published with open access at Springerlink.com Abstract A historical overview is given of the contributions of Hendrik Antoon Lorentz in quantum theory. Although especially his early work is valuable, the main importance of Lorentz’s work lies in the conceptual clarifications he provided and in his critique of the foundations of quantum theory. 1 Introduction The Dutch physicist Hendrik Antoon Lorentz (1853–1928) is generally viewed as an icon of classical, nineteenth-century physics—indeed, as one of the last masters of that era. Thus, it may come as a bit of a surprise that he also made important contribu- tions to quantum theory, the quintessential non-classical twentieth-century develop- ment in physics. The importance of Lorentz’s work lies not so much in his concrete contributions to the actual physics—although some of his early work was ground- breaking—but rather in the conceptual clarifications he provided and his critique of the foundations and interpretations of the new ideas. -
Ein Bisher Unbekanntes Zeitzeugnis
N. T. M. 16 (2008) 103–115 0036-6978/08/010103–13 OUND DOI 10.1007/S00048-007-0277-7 © 2008 BIRKHÄUSER VERLAG, BASEL F & OST /L UNDSTÜCK Ein bisher unbekanntes Zeitzeugnis. F Otto Warburgs Tagebuchnotizen von Februar–April 1945 Kärin Nickelsen Warburg’s diary notes February–April 1945 Personal notes in the form of a diary, written by the German cell biologist Otto Warburg in the weeks before the collapse of Germany’s Third Reich (Feb.-April 1945), were found at the end of one of his labo- ratory notebooks, which are preserved in the Archives of the Berlin-Brandenburg Academy of Sciences and Humanities. These notes are unique in form and content: there seem to be no other surviving diary notes of this type. Written from a very personal perspective, they provide a detailed account of how Warburg experienced local events in this decisive and turbulent period. Furthermore, they clearly demonstrate Warburg’s embittered attitude towards some of his long-standing collaborators, whom he suspected of having denounced him to the Nazi authorities. In this paper, Warburg’s notes are fully transcribed and integrated into the historical context. Keywords: Otto Warburg, Kaiser-Wilhelm-Society, National Socialism, diary notes Schlüsselwörter: Otto Warburg, Kaiser-Wilhelm-Gesellschaft, Nationalsozialismus, Tagebuchnotizen | downloaded: 29.9.2021 Otto Warburg (1883–1970) ist in der Wissenschaftsgeschichte vor allem bekannt für seine bahnbrechenden Arbeiten zur Zellatmung, für die ihm 1931 der Nobelpreis verliehen wurde.1 In anderen Kontexten wiederum ist er bekannt als einer der ganz wenigen Wissenschaftler jüdischer Abstam- mung, die während der gesamten Zeit des Nationalsozialismus in Amt und Würden blieben: Nicht nur wurde Warburg nicht deportiert, er blieb bis 1945 Direktor des Kaiser-Wilhelm-Instituts (KWI) für Zellphysiologie in Berlin-Dahlem.2 Unter anderem stand er eigenen Angaben zufolge bis 1937 unter dem persönlichen Schutz von Friedrich Glum, damals Generaldirektor der Kaiser-Wilhelm-Gesellschaft (Werner 1991: 284). -
Einstein's Mistakes
Einstein’s Mistakes Einstein was the greatest genius of the Twentieth Century, but his discoveries were blighted with mistakes. The Human Failing of Genius. 1 PART 1 An evaluation of the man Here, Einstein grows up, his thinking evolves, and many quotations from him are listed. Albert Einstein (1879-1955) Einstein at 14 Einstein at 26 Einstein at 42 3 Albert Einstein (1879-1955) Einstein at age 61 (1940) 4 Albert Einstein (1879-1955) Born in Ulm, Swabian region of Southern Germany. From a Jewish merchant family. Had a sister Maja. Family rejected Jewish customs. Did not inherit any mathematical talent. Inherited stubbornness, Inherited a roguish sense of humor, An inclination to mysticism, And a habit of grüblen or protracted, agonizing “brooding” over whatever was on its mind. Leading to the thought experiment. 5 Portrait in 1947 – age 68, and his habit of agonizing brooding over whatever was on its mind. He was in Princeton, NJ, USA. 6 Einstein the mystic •“Everyone who is seriously involved in pursuit of science becomes convinced that a spirit is manifest in the laws of the universe, one that is vastly superior to that of man..” •“When I assess a theory, I ask myself, if I was God, would I have arranged the universe that way?” •His roguish sense of humor was always there. •When asked what will be his reactions to observational evidence against the bending of light predicted by his general theory of relativity, he said: •”Then I would feel sorry for the Good Lord. The theory is correct anyway.” 7 Einstein: Mathematics •More quotations from Einstein: •“How it is possible that mathematics, a product of human thought that is independent of experience, fits so excellently the objects of physical reality?” •Questions asked by many people and Einstein: •“Is God a mathematician?” •His conclusion: •“ The Lord is cunning, but not malicious.” 8 Einstein the Stubborn Mystic “What interests me is whether God had any choice in the creation of the world” Some broadcasters expunged the comment from the soundtrack because they thought it was blasphemous. -
The Nobel Prize Sweden.Se
Facts about Sweden: The Nobel Prize sweden.se The Nobel Prize – the award that captures the world’s attention The Nobel Prize is considered the most prestigious award in the world. Prize- winning discoveries include X-rays, radioactivity and penicillin. Peace Laureates include Nelson Mandela and the 14th Dalai Lama. Nobel Laureates in Literature, including Gabriel García Márquez and Doris Lessing, have thrilled readers with works such as 'One Hundred Years of Solitude' and 'The Grass is Singing'. Every year in early October, the world turns Nobel Day is 10 December. For the prize its gaze towards Sweden and Norway as the winners, it is the crowning point of a week Nobel Laureates are announced in Stockholm of speeches, conferences and receptions. and Oslo. Millions of people visit the website At the Nobel Prize Award Ceremony in of the Nobel Foundation during this time. Stockholm on that day, the Laureates in The Nobel Prize has been awarded to Physics, Chemistry, Physiology or Medicine, people and organisations every year since and Literature receive a medal from the 1901 (with a few exceptions such as during King of Sweden, as well as a diploma and The Nobel Banquet is World War II) for achievements in physics, a cash award. The ceremony is followed a magnificent party held chemistry, physiology or medicine, literature by a gala banquet. The Nobel Peace Prize at Stockholm City Hall. and peace. is awarded in Oslo the same day. Photo: Henrik Montgomery/TT Henrik Photo: Facts about Sweden: The Nobel Prize sweden.se Prize in Economic Sciences prize ceremonies. -
Joint Comments on Treatment of Biomass (PDF)
October 31, 2018 Joint Comments of Clean Air Task Force, Natural Resources Defense Council, Center for Biological Diversity, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Dogwood Alliance, Partnership for Policy Integrity, and Sierra Club on the Treatment of Biomass-Based Power Generation in EPA’s Proposed Emission Guidelines for Greenhouse Gas Emissions from Existing Electric Utility Generating Units; Revisions to Emission Guideline Implementing Regulations; Revisions to New Source Review Program (83 Fed. Reg. 44746 (August 31, 2018) Docket No. EPA-HQ-OAR-2017-0355 Submitted via regulations.gov Environmental and public health organizations Clean Air Task Force, Natural Resources Defense Council, Center for Biological Diversity, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Dogwood Alliance, Partnership for Policy Integrity, and Sierra Club hereby submit the following comments on the “best system of emission reduction” and other issues EPA’s proposed rule “Emission Guidelines for Greenhouse Gas Emissions from EXisting Electric Utility Generating Units; Revisions to Emission Guideline Implementing Regulations; Revisions to New Source Review Program,” 83 Fed. Reg. 44,746 (Aug. 31, 2018). [I] Overview Climate change continues to intensify and threaten public health and welfare. A recent report from the Intergovernmental Panel on Climate Change (IPCC) concludes that if greenhouse gas (GHG) emissions continue at the current rate, the atmosphere will warm by as much as 1.5°C (or 2.7°F) by 2040.1 “Climate-related risks to health, livelihoods, food security, water supply, human security, and economic growth are projected to increase with global warming of 1.5°C and increase further with 2°C.”2 The power sector was responsible for 29 percent of the climate-warming GHGs emitted in the United States in 2017,3 making it imperative that the U.S. -
Digital Society
B56133 The Science Magazine of the Max Planck Society 4.2018 Digital Society POLITICAL SCIENCE ASTRONOMY BIOMEDICINE LEARNING PSYCHOLOGY Democracy in The oddballs of A grain The nature of decline in Africa the solar system of brain children’s curiosity SCHLESWIG- Research Establishments HOLSTEIN Rostock Plön Greifswald MECKLENBURG- WESTERN POMERANIA Institute / research center Hamburg Sub-institute / external branch Other research establishments Associated research organizations Bremen BRANDENBURG LOWER SAXONY The Netherlands Nijmegen Berlin Italy Hanover Potsdam Rome Florence Magdeburg USA Münster SAXONY-ANHALT Jupiter, Florida NORTH RHINE-WESTPHALIA Brazil Dortmund Halle Manaus Mülheim Göttingen Leipzig Luxembourg Düsseldorf Luxembourg Cologne SAXONY DanielDaniel Hincapié, Hincapié, Bonn Jena Dresden ResearchResearch Engineer Engineer at at Marburg THURINGIA FraunhoferFraunhofer Institute, Institute, Bad Münstereifel HESSE MunichMunich RHINELAND Bad Nauheim PALATINATE Mainz Frankfurt Kaiserslautern SAARLAND Erlangen “Germany,“Germany, AustriaAustria andand SwitzerlandSwitzerland areare knownknown Saarbrücken Heidelberg BAVARIA Stuttgart Tübingen Garching forfor theirtheir outstandingoutstanding researchresearch opportunities.opportunities. BADEN- Munich WÜRTTEMBERG Martinsried Freiburg Seewiesen AndAnd academics.comacademics.com isis mymy go-togo-to portalportal forfor jobjob Radolfzell postings.”postings.” Publisher‘s Information MaxPlanckResearch is published by the Science Translation MaxPlanckResearch seeks to keep partners and -
Wolfgang Pauli Niels Bohr Paul Dirac Max Planck Richard Feynman
Wolfgang Pauli Niels Bohr Paul Dirac Max Planck Richard Feynman Louis de Broglie Norman Ramsey Willis Lamb Otto Stern Werner Heisenberg Walther Gerlach Ernest Rutherford Satyendranath Bose Max Born Erwin Schrödinger Eugene Wigner Arnold Sommerfeld Julian Schwinger David Bohm Enrico Fermi Albert Einstein Where discovery meets practice Center for Integrated Quantum Science and Technology IQ ST in Baden-Württemberg . Introduction “But I do not wish to be forced into abandoning strict These two quotes by Albert Einstein not only express his well more securely, develop new types of computer or construct highly causality without having defended it quite differently known aversion to quantum theory, they also come from two quite accurate measuring equipment. than I have so far. The idea that an electron exposed to a different periods of his life. The first is from a letter dated 19 April Thus quantum theory extends beyond the field of physics into other 1924 to Max Born regarding the latter’s statistical interpretation of areas, e.g. mathematics, engineering, chemistry, and even biology. beam freely chooses the moment and direction in which quantum mechanics. The second is from Einstein’s last lecture as Let us look at a few examples which illustrate this. The field of crypt it wants to move is unbearable to me. If that is the case, part of a series of classes by the American physicist John Archibald ography uses number theory, which constitutes a subdiscipline of then I would rather be a cobbler or a casino employee Wheeler in 1954 at Princeton. pure mathematics. Producing a quantum computer with new types than a physicist.” The realization that, in the quantum world, objects only exist when of gates on the basis of the superposition principle from quantum they are measured – and this is what is behind the moon/mouse mechanics requires the involvement of engineering. -
25 Years of Quantum Hall Effect
S´eminaire Poincar´e2 (2004) 1 – 16 S´eminaire Poincar´e 25 Years of Quantum Hall Effect (QHE) A Personal View on the Discovery, Physics and Applications of this Quantum Effect Klaus von Klitzing Max-Planck-Institut f¨ur Festk¨orperforschung Heisenbergstr. 1 D-70569 Stuttgart Germany 1 Historical Aspects The birthday of the quantum Hall effect (QHE) can be fixed very accurately. It was the night of the 4th to the 5th of February 1980 at around 2 a.m. during an experiment at the High Magnetic Field Laboratory in Grenoble. The research topic included the characterization of the electronic transport of silicon field effect transistors. How can one improve the mobility of these devices? Which scattering processes (surface roughness, interface charges, impurities etc.) dominate the motion of the electrons in the very thin layer of only a few nanometers at the interface between silicon and silicon dioxide? For this research, Dr. Dorda (Siemens AG) and Dr. Pepper (Plessey Company) provided specially designed devices (Hall devices) as shown in Fig.1, which allow direct measurements of the resistivity tensor. Figure 1: Typical silicon MOSFET device used for measurements of the xx- and xy-components of the resistivity tensor. For a fixed source-drain current between the contacts S and D, the potential drops between the probes P − P and H − H are directly proportional to the resistivities ρxx and ρxy. A positive gate voltage increases the carrier density below the gate. For the experiments, low temperatures (typically 4.2 K) were used in order to suppress dis- turbing scattering processes originating from electron-phonon interactions. -
Basic Research in the Max Planck Society Science Policy in the Federal Republic of Germany, 1945–1970
Chapter 5 Basic Research in the Max Planck Society Science Policy in the Federal Republic of Germany, 1945–1970 Carola Sachse ላሌ The Max Planck Society for the Advancement of Science (MPG, Max- Planck-Gesellschaft zur Förderung der Wissenschaften) is commonly consid- ered a stronghold of basic research in the German research landscape. When it was reestablished in 1948 in the Western zones of occupation, the society adopted the defi ning part of its predecessor’s name, the Kaiser Wilhelm So- ciety for the Advancement of Science (KWG, Kaiser-Wilhelm-Gesellschaft zur Förderung der Wissenschaften), which had been founded in 1911. In contrast to its organizational counterpart, the Fraunhofer Society for the Ad- vancement of Applied Research (Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung), whose distinctive purpose has been incorporated into its name since its foundation in 1949 (Trischler and vom Bruch 1999), the MPG did not include the term “basic research” in its full name, nor does the term appear in any of its statutes of the last one hundred years. The offi - cial documents of the MPG instead refer to “scientifi c research” in the broad German sense of wissenschaftliche Forschung and combine it in varying formu- lations with the terms “freedom” and “independence.”1 Both of these terms are cornerstones in what became known as Harnack- Prinzip (Harnack principle). Named after Adolf von Harnack, the initiator and fi rst and longtime serving president of the KWG, this principle included two main aspects: fi rst, institutes should be founded only if a man was avail- able (women were not considered) for the post of managing director “who has This open access library edition is supported by the University of Bonn. -
Del Progetto Einstein@Home, Scoprono Una Nuova Pulsar Nei Dati Del Radio Telescopio Di Arecibo
Gente comune, ‘’scienziati’’ del progetto Einstein@Home, scoprono una nuova pulsar nei dati del radio telescopio di Arecibo. I computer inattivi sono un po’ come il parco giochi degli astronomi: tre persone comuni, un tedesco ed una coppia in America, hanno scoperto una pulsar nascosta nei dati raccolti dall’osservatorio di Arecibo. Questa e’ la prima scoperta dello spazio profondo da parte di Einstein@Home, un progetto che utilizza il tempo di calcolo donato da 250 000 volontari in 192 differenti paesi. I volontari mettono a disposizione i propri computer quando non li stanno usando (Science Express, Aug. 12, 2010.). I volontari i cui computer hanno fatto la scoperta sono Chris ed Helen Colvin, di Ames, nell’Iowa, USA, e Daniel Gebhardt dell’universita’ di Mainz , dipartimento di informatica musicale, Germania. I loro computer, assieme agli altri 500 000 sparsi in tutto il mondo, analizzano dati per Einstein@Home (in media ogni volontario contribuisce con due computer). La nuova pulsar, chiamata PSR J2007+2722, e’ una stella di neutroni che ruota su se’ stessa 41 volte al secondo. La pulsar si trova nella Via Lattea nella costellazione Vulpecula a circa 17 000 anni luce dalla Terra. A differenza delle altre pulsar che ruotano velocemente e stabilmente come lei, J2007+2722 se ne sta tutta sola nello spazio senza nessun’altra stella compagna ad orbitarle attorno. Gli astronomi ritengono che J2007+2722 sia particolarmente interessante perche’ e’ probabilmente una pulsar riciclata che ha perso durante la propria evoluzione la stella compagna. Questa ipotesi, seppure la piu’ interessante, rimane tuttavia una ipotesi e altri scenari sono possibili, per esempio che J2007+2722 sia una pulsar giovane nata con un campo magnetico piu’ basso del normale. -
EMBO Facts & Figures
excellence in life sciences Reykjavik Helsinki Oslo Stockholm Tallinn EMBO facts & figures & EMBO facts Copenhagen Dublin Amsterdam Berlin Warsaw London Brussels Prague Luxembourg Paris Vienna Bratislava Budapest Bern Ljubljana Zagreb Rome Madrid Ankara Lisbon Athens Jerusalem EMBO facts & figures HIGHLIGHTS CONTACT EMBO & EMBC EMBO Long-Term Fellowships Five Advanced Fellows are selected (page ). Long-Term and Short-Term Fellowships are awarded. The Fellows’ EMBO Young Investigators Meeting is held in Heidelberg in June . EMBO Installation Grants New EMBO Members & EMBO elects new members (page ), selects Young EMBO Women in Science Young Investigators Investigators (page ) and eight Installation Grantees Gerlind Wallon EMBO Scientific Publications (page ). Programme Manager Bernd Pulverer S Maria Leptin Deputy Director Head A EMBO Science Policy Issues report on quotas in academia to assure gender balance. R EMBO Director + + A Conducts workshops on emerging biotechnologies and on H T cognitive genomics. Gives invited talks at US National Academy E IC of Sciences, International Summit on Human Genome Editing, I H 5 D MAN 201 O N Washington, DC.; World Congress on Research Integrity, Rio de A M Janeiro; International Scienti c Advisory Board for the Centre for Eilish Craddock IT 2 015 Mammalian Synthetic Biology, Edinburgh. Personal Assistant to EMBO Fellowships EMBO Scientific Publications EMBO Gold Medal Sarah Teichmann and Ido Amit receive the EMBO Gold the EMBO Director David del Álamo Thomas Lemberger Medal (page ). + Programme Manager Deputy Head EMBO Global Activities India and Singapore sign agreements to become EMBC Associate + + Member States. EMBO Courses & Workshops More than , participants from countries attend 6th scienti c events (page ); participants attend EMBO Laboratory Management Courses (page ); rst online course EMBO Courses & Workshops recorded in collaboration with iBiology. -
Nobel Prize Physicists Meet at Lindau
From 28 June to 2 July 1971 the German island town of Lindau in Nobel Prize Physicists Lake Constance close to the Austrian and Swiss borders was host to a gathering of illustrious men of meet at Lindau science when, for the 21st time, Nobel Laureates held their reunion there. The success of the first Lindau reunion (1951) of Nobel Prize win ners in medicine had inspired the organizers to invite the chemists and W. S. Newman the physicists in turn in subsequent years. After the first three-year cycle the United Kingdom, and an audience the dates of historical events. These it was decided to let students and of more than 500 from 8 countries deviations in the radiocarbon time young scientists also attend the daily filled the elegant Stadttheater. scale are due to changes in incident meetings so they could encounter The programme consisted of a num cosmic radiation (producing the these eminent men on an informal ber of lectures in the mornings, two carbon isotopes) brought about by and personal level. For the Nobel social functions, a platform dis variations in the geomagnetic field. Laureates too the Lindau gatherings cussion, an informal reunion between Thus chemistry may reveal man soon became an agreeable occasion students and Nobel Laureates and, kind’s remote past whereas its long for making or renewing acquain on the last day, the traditional term future could well be shaped by tances with their contemporaries, un steamer excursion on Lake Cons the developments mentioned by trammelled by the formalities of the tance to the island of Mainau belong Mössbauer, viz.