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Helge Kragh [142]Helge S. Kragh [3]
  1.  4
    The Periodic System and the Idea of a Chemical Element: From Mendeleev to Superheavy Elements.Helge Kragh - 2019 - Centaurus 61 (4):329-344.
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  2. Contemporary History of Cosmology and the Controversy Over the Multiverse.Helge Kragh - 2009 - Annals of Science 66 (4):529-551.
    Cosmology has always been different from other areas of the natural sciences. Although an observationally supported standard model of the universe emerged in the 1960s, more speculative models and conceptions continued to attract attention. During the last decade, ideas of multiple universes based on anthropic reasoning have become very popular among cosmologists and theoretical physicists. This had led to a major debate within the scientific community of the epistemic standards of modern cosmology. Is the multiverse a scientific hypothesis, or is (...)
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  3.  2
    From Transuranic to Superheavy Elements: A Story of Dispute and Creation.Helge Kragh - 2018 - Springer Verlag.
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  4.  41
    “The Most Philosophically Important of All the Sciences”: Karl Popper and Physical Cosmology.Helge Kragh - 2013 - Perspectives on Science 21 (3):325-357.
    While Karl Popper’s philosophy of science has only few followers among modern philosophers, it is easily the view of science with the biggest impact on practicing scientists. According to Peter Medawar, Nobel laureate and eminent physiologist, Popper was the greatest authority ever on the scientific method. He praised the “great strength of Karl Popper’s conception of the scientific process,” a main reason for the praise being “that it is realistic—it gives a pretty fair picture of what goes on in real (...)
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  5.  49
    Conceptions of Cosmos: From Myths to the Accelerating Universe: A History of Cosmology.Helge S. Kragh - 2006 - Oxford University Press.
    This book presents the history of how the universe at large became the object of scientific understanding. Starting with the ancient creation myths, it offers an integrated and comprehensive account of cosmology that covers all major events from Aristotle's Earth-centred cosmos to the recent discovery of the accelearting universe.
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  6.  7
    Fifteen Years of the History of Science in Europe: Personal Reflections by the ESHS Presidents.Koen Vermeir, Claude Debru, Robert Fox, Eberhard Knobloch, Helge Kragh, Soňa Štrbáňová, Fabio Bevilacqua, Karine Chemla & Antoni Malet - 2018 - Centaurus 60 (1-2):104-123.
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  7.  16
    Erwin Schrödinger and the Wave Equation: The Crucial Phase.Helge Kragh - 1982 - Centaurus 26 (2):154-197.
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  8.  40
    Conceptual Changes in Chemistry: The Notion of a Chemical Element, Ca. 1900–1925.Helge Kragh - 2000 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 31 (4):435-450.
  9.  63
    From Time Atoms to Space-Time Quantization: The Idea of Discrete Time, Ca 1925–1936.Helge Kragh & Bruno Carazza - 1994 - Studies in History and Philosophy of Science Part A 25 (3):437-462.
  10.  14
    A Sense of History: History of Science and the Teaching of Introductory Quantum Theory.Helge Kragh - 1992 - Science & Education 1 (4):349-363.
  11.  6
    Magic Number: A Partial History of the Fine-Structure Constant.Helge Kragh - 2003 - Archive for History of Exact Sciences 57 (5):395-431.
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  12.  26
    The Concept of the Monopole. A Historical and Analytical Case-Study.Helge Kragh - 1981 - Studies in History and Philosophy of Science Part A 12 (2):141.
  13.  22
    Who Discovered the Expanding Universe?Helge Kragh & Robert W. Smith - 2003 - History of Science 41 (2):141-162.
  14. Cosmology and Theology.Hans Halvorson & Helge Kragh - 2011 - Stanford Encyclopedia of Philosophy.
  15.  14
    Georges Lemaître, Pioneer of Modern Theoretical Cosmology.Helge Kragh - 2018 - Foundations of Physics 48 (10):1333-1348.
    No other scientist may have had a greater impact on modern cosmology than the Belgian physicist, astronomer and priest Georges Lemaître. In 1927 he predicted the expansion of the universe on the basis of the cosmological field equations; and four years later he proposed what he called the primeval-atom hypothesis, the first version of the later big bang universe. In all his work on cosmology the cosmological constant Λ played a significant role. A recognized expert in the theory of general (...)
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  16.  37
    Testability and Epistemic Shifts in Modern Cosmology.Helge Kragh - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 46 (1):48-56.
    During the last decade new developments in theoretical and speculative cosmology have reopened the old discussion of cosmology's scientific status and the more general question of the demarcation between science and non-science. The multiverse hypothesis, in particular, is central to this discussion and controversial because it seems to disagree with methodological and epistemic standards traditionally accepted in the physical sciences. But what are these standards and how sacrosanct are they? Does anthropic multiverse cosmology rest on evaluation criteria that conflict with (...)
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  17.  18
    Conceptual Changes in Chemistry: The Notion of a Chemical Element, Ca. 1900–1925.Helge Kragh - 2000 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 31 (4):435-450.
  18.  12
    Anatomy of a Priority Conflict: The Case of Element 72.Helge Kragh - 1980 - Centaurus 23 (4):275-301.
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  19.  15
    Julius Thomsen and Classical Thermochemistry.Helge Kragh - 1984 - British Journal for the History of Science 17 (3):255-272.
    Classical thermochemistry is inextricably bound up with the problem of chemical affinity. In 1851, when Julius Thomsen began his career in thermochemistry, the concept of chemical affinity had been in the centre of chemical enquiry for more than a century. In spite of many suggestions, preferably to explain affinity in terms of electrical or gravitational forces, almost nothing was known about the cause and nature of affinity. In this state of puzzling uncertainty some chemists felt it more advantageous to establish (...)
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  20.  5
    Concept and Controversy: Jean Becquerel and the Positive Electron.Helge Kragh - 1989 - Centaurus 32 (2):203-240.
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  21.  21
    Julius Thomsen and 19th-Century Speculations on the Complexity of Atoms.Helge Kragh - 1982 - Annals of Science 39 (1):37-60.
    In the history of chemistry, the Danish chemist Julius Thomsen is best known for his contributions to thermochemistry. Throughout his life, he was a pronounced atomist and a tireless advocate of neo-Proutian views as to the constitution of matter. On many occasions, especially in his later years, he engaged in speculations concerning the unity of matter and the complexity of atoms. In this engagement, Thomsen was alone in Danish chemistry, but his works were representative of a large number of 19th-century (...)
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  22.  22
    “The Most Philosophically of All the Sciences”: Karl Popper and Physical Cosmology.Helge Kragh - unknown
    Problems of scientific cosmology only rarely occur in the works of Karl Popper. Nevertheless, it was a subject that interested him and which he occasionally commented on. What is more important, his general claim of falsifiability as a criterion that demarcates science from non-science has played a significant role in periods of the development of modern physical cosmology. The paper examines the historical contexts of the interaction between cosmology and Popperian philosophy of science. Apart from covering Popper’s inspiration from Einstein (...)
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  23.  10
    Testability and Epistemic Shifts in Modern Cosmology.Helge Kragh - 2012 - Studies in History and Philosophy of Modern Physics 46:48-56.
    During the last decade new developments in theoretical and speculative cosmology have reopened the old discussion of cosmology’s scientific status and the more general question of the demarcation between science and non-science. The multiverse hypothesis, in particular, is central to this discussion and controversial because it seems to disagree with methodological and epistemic standards traditionally accepted in the physical sciences. But what are these standards and how sacrosanct are they? Does anthropic multiverse cosmology rest on evaluation criteria that conflict with (...)
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  24.  8
    On Modern Cosmology and its Place in Science Education.Helge Kragh - 2011 - Science & Education 20 (3-4):343-357.
  25.  34
    The Solar Element: A Reconsideration of Helium's Early History.Helge Kragh - 2009 - Annals of Science 66 (2):157-182.
    Apart from hydrogen, helium is the most abundant chemical element in the universe, and yet it was only discovered on the Earth in 1895. Its early history is unique because it encompasses astronomy as well as chemistry, two sciences which the spectroscope brought into contact during the second half of the nineteenth century. In the modest form of a yellow spectral line known as D3, ‘helium’ was sometimes supposed to exist in the Sun's atmosphere, an idea which is traditionally ascribed (...)
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  26.  14
    Mathematics and Physics: The Idea of a Pre-Established Harmony.Helge Kragh - 2015 - Science & Education 24 (5-6):515-527.
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  27.  4
    A Controversial Molecule: The Early History of Triatomic Hydrogen.Helge Kragh - 2011 - Centaurus 53 (4):257-279.
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  28.  85
    The First Subatomic Explanations of the Periodic System.Helge Kragh - 2001 - Foundations of Chemistry 3 (2):129-143.
    Attempts to explain the periodic system as a manifestation of regularities in the structure of the atoms of the elements are as old as the system itself. The paper analyses some of the most important of these attempts, in particular such works that are historically connected with the recognition of the electron as a fundamental building block of all matter. The history of the periodic system, the discovery of the electron, and ideas of early atomic structure are closely interwoven and (...)
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  29. Between Physics and Chemistry: Helmholtz's Route to a Theory of Chemical Thermodynamics.Helge Kragh - 1993 - In David Cahan (ed.), Hermann von Helmholtz and the Foundations of Nineteenth-Century Science. University of California Press. pp. 403--431.
  30.  8
    The Beginning of the World: Georges Lemaître and the Expanding Universe.Helge Kragh - 1987 - Centaurus 30 (2):114-139.
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  31.  15
    Arthur March, Werner Heisenberg, and the Search for a Smallest Length/Arthur March, Werner Heisenberg, Et la Notion de Longueur Minimale.Helge Kragh - 1995 - Revue d'Histoire des Sciences 48 (4):401-434.
  32.  48
    Adolfo Bartoli and the Problem of Radiant Heat.Bruno Carazza & Helge Kragh - 1989 - Annals of Science 46 (2):183-194.
    In 1876 the Italian physicist and physical chemist Adolfo Bartoli discussed a thought experiment in which he connected the second law of thermodynamics with the hypothetical pressure of radiation. Bartoli's work, published in Italian, exerted some influence on the subsequent development of black-body theory and light pressure research. This influence was mainly due to Boltzmann, who came to the Stefan-Boltzmann radiation law via a reworking of Bartoli's thought experiment. However, contrary to what is usually assumed, Bartoli was himself reluctant to (...)
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  33.  8
    Ludvig Lorenz and the Early Theory of Long-Distance Telephony.Helge Kragh - 1992 - Centaurus 35 (3):305-324.
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  34.  17
    S. M. Jørgensen And His Controversy With A. Werner: A Reconsideration.Helge Kragh - 1997 - British Journal for the History of Science 30 (2):203-219.
    The controversy between Alfred Werner and Sophus Mads Jørgensen over the structure of complex inorganic compounds is not among the best known of the many controversies in the history of chemistry, but it is one of the most thoroughly described in the historical literature. This is due almost solely to the works of George Kauffman, the distinguished American historian of chemistry and specialist in the history of coordination chemistry. Kauffman has described and analysed almost every aspect of the development of (...)
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  35.  23
    Before Cosmophysics: E.A. Milne on Mathematics and Physics.Helge Kragh & Simon Rebsdorf - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (1):35-50.
    This paper examines the thoughts and early career of the astrophysicist and cosmologist E. A. Milne. Although Milne only turned to cosmology in 1932, many of the ideas that characterised his heterodox system of world physics can be traced back to his works from the 1920s. Contrary to what has been stated in the literature, we argue that Milne was familiar with and interested in cosmology even before 1932. The relationship between mathematics and physics, an important topic in Milne's cosmophysics, (...)
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  36.  10
    Remarks on the Historiography and Philosophy of Modern Cosmology.Helge Kragh - 1997 - Danish Yearbook of Philosophy 32 (1):65.
  37.  4
    Before Cosmophysics: E.A. Milne on Mathematics and Physics.Helge Kragh & Simon Rebsdorf - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (1):35-50.
  38.  1
    Letters to the Editor.Leland Anderson, Sungook Hong, Gennady Gorelik & Helge Kragh - 1996 - Isis 87 (2):128-130.
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  39.  7
    Letters to the Editor.Leland Anderson, Sungook Hong, Gennady Gorelik & Helge Kragh - 1996 - Isis 87 (1):128-130.
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  40. Vedkommende Videnskabsteori.Hanne Andersen, Louis Klostergaard, Henrik Knudsen, Helge Kragh, Keld Nielsen, Kurt Mã¸Ller Pedersen & Henrik Kragh Sã¸Rensen - 2009 - Aktuel Naturvidenskab (1):32--35.
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  41. Classical Behavior of Macroscopic Bodies From Quantum Principles: Early Discussions.Bruno Carazza & Helge Kragh - 2000 - Archive for History of Exact Sciences 55 (1):43-56.
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  42.  6
    Von Leibniz'Metaphysik (2001), Leibniz: Metaphilosophy and Metaphysics, 1666–1686 (2005), and Biomedical Ontology and the Metaphysics of Composite Substances, 1540–1670 (2010). Martin Campbell-Kelly is Emeritus Professor in the Department of Com-Puter Science at the University of Warwick, Where He Specializes in The. [REVIEW]J. L. Heilbron & Helge Kragh - 2013 - Perspectives on Science 21 (3).
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  43.  2
    An Anthropic Myth: Fred Hoyle’s Carbon-12 Resonance Level.Helge Kragh - 2010 - Archive for History of Exact Sciences 64 (6):721-751.
    The case of Fred Hoyle’s prediction of a resonance state in carbon-12, unknown in 1953 when it was predicted, is often mentioned as an example of anthropic prediction. However, an investigation of the historical circumstances of the prediction and its subsequent experimental confirmation shows that Hoyle and his contemporaries did not associate the level in the carbon nucleus with life. Only in the 1980s, after the emergence of the anthropic principle, did it become common to see Hoyle’s prediction as anthropically (...)
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  44.  6
    A History Of Physical Theories Of Comets, From Aristotle To Whipple. [REVIEW]Helge Kragh - 2010 - Isis 101:195-196.
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  45.  7
    A Short History of Scientific Thought - by John Henry.Helge Kragh - 2012 - Centaurus 54 (3):250-251.
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  46.  3
    Before Quantum Chemistry: Erich Huckel and the Physics-Chemistry Interface.Helge Kragh - 2001 - Centaurus 43 (1):1-16.
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  47.  3
    Bohr’s Quantum Philosophy: On the Shoulder of a Giant?Helge Kragh - 1992 - Danish Yearbook of Philosophy 27 (1):109-118.
  48. Bohr’s Quantum Philosophy.Helge Kragh - 2016 - Science & Education 25 (7-8):937-938.
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  49.  77
    Book Review: By Jagdish Mehra and Helmut Rechenberg. Springer, New York, 2000, Xxxvi+ 1612 Pp., $149.00 (Hardcover). [REVIEW]Helge Kragh - 2002 - Foundations of Physics 32 (1):187-189.
  50.  7
    Bruno Rossi. Moments in the Life of a Scientist. Cambridge: Cambridge University Press, 1990. Pp. Xv + 181. ISBN 0-521-36439-6. £27.50, $44.50. [REVIEW]Helge Kragh - 1991 - British Journal for the History of Science 24 (4):478-479.
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