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Helge Kragh [144]Helge S. Kragh [3]
  1.  4
    From Transuranic to Superheavy Elements: A Story of Dispute and Creation.Helge Kragh - 2018 - Springer Verlag.
    The story of superheavy elements - those at the very end of the periodic table - is not well known outside the community of heavy-ion physicists and nuclear chemists. But it is a most interesting story which deserves to be known also to historians, philosophers, and sociologists of science and indeed to the general public. This is what the present work aims at. It tells the story or rather parts of the story, of how physicists and chemists created elements heavier (...)
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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.  45
    “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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  4.  5
    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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  5.  51
    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. Cosmology and Theology.Hans Halvorson & Helge Kragh - 2011 - Stanford Encyclopedia of Philosophy.
  7.  46
    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.
  8.  25
    Who Discovered the Expanding Universe?Helge Kragh & Robert W. Smith - 2003 - History of Science 41 (2):141-162.
  9.  17
    A Sense of History: History of Science and the Teaching of Introductory Quantum Theory.Helge Kragh - 1992 - Science & Education 1 (4):349-363.
  10.  19
    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.
  11.  21
    Erwin Schrödinger and the Wave Equation: The Crucial Phase.Helge Kragh - 1982 - Centaurus 26 (2):154-197.
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  12.  9
    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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  13.  9
    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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  14. On Scientific Biography and Biographies of Scientists.Helge Kragh - 2015 - In Ana Simões, Jürgen Renn & Theodore Arabatzis (eds.), Relocating the History of Science. Springer Verlag.
     
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  15.  41
    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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  16.  69
    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.
  17.  9
    On Modern Cosmology and its Place in Science Education.Helge Kragh - 2011 - Science & Education 20 (3-4):343-357.
  18.  30
    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.
  19.  14
    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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  20.  10
    Philosophical Contexts of the Steady-State Universe.Helge Kragh - 2022 - Hopos: The Journal of the International Society for the History of Philosophy of Science 12 (1):129-145.
    Modern standard big bang cosmology was preceded by a 15-year controversy with the rival steady-state theory of the universe. At a time when cosmologically relevant observations were scarce and cosmology was widely regarded as an immature science, or not a science at all, much of the debate took place by means of arguments that were essentially philosophical. Remarkably, professional philosophers, including some of the key figures of Anglo-American philosophy of science, took an active part in the debate; no less remarkably, (...)
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  21.  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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  22.  12
    Anatomy of a Priority Conflict: The Case of Element 72.Helge Kragh - 1980 - Centaurus 23 (4):275-301.
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  23.  17
    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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  24.  6
    Concept and Controversy: Jean Becquerel and the Positive Electron.Helge Kragh - 1989 - Centaurus 32 (2):203-240.
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  25.  38
    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.  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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  27.  23
    “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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  28. 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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  29. The Electrical Universe: Grand Cosmological Theory Versus Mundane Experiments.Helge Kragh - 1997 - Perspectives on Science 5:199-231.
  30.  16
    Mathematics and Physics: The Idea of a Pre-Established Harmony.Helge Kragh - 2015 - Science & Education 24 (5-6):515-527.
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  31.  4
    A Controversial Molecule: The Early History of Triatomic Hydrogen.Helge Kragh - 2011 - Centaurus 53 (4):257-279.
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  32.  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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  33. 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.
  34.  28
    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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  35. Sommerfeld, the Quantum, and the Problem Approach to Physics: Suman Seth: Crafting the Quantum: Arnold Sommerfeld and the Practice of Theory, 1890–1926. Cambridge, MA: MIT Press, 2010, Viii+378 Pp, US $32.00 HB.Helge Kragh - 2011 - Metascience 20 (1):87-90.
    In the early phase of the new history of physics that emerged at about 1970 and was pioneered by John Heilbron, Thomas Kuhn, Paul Forman, and others, the quantum and atomic theories of the first three decades of the twentieth century played a central role. Since then, interest in the area has continued, but for the last few decades at a slower rate. While other areas of the new physics—such as the general theory of relativity—have attracted much attention, only relatively (...)
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  36.  8
    The Beginning of the World: Georges Lemaître and the Expanding Universe.Helge Kragh - 1987 - Centaurus 30 (2):114-139.
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  37.  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.
  38.  65
    A Review of Rinat M.Nugayev's Book "Reconstruction of Mature Theory Change: A Theory-Change Model". [REVIEW]Rinat M. Nugayev & Helge Kragh - 2001 - Centaurus 43 (2):132-133.
    The aim of this book, written by a researcher at the Tatarstan Academy of Sciences, is to examine how and why theories change in science. Nugayev’s analysis, and his many examples, are confined to mathematically formalized theories of physics. Nugayev’s ideas are inspired by, and relate to, Russian scholars. His approach is primarily philosophical and clearly in the analytical tradition of Popper, Kuhn, Lakatos, Feyerabend, Stegmuller and others. Although Nugayev’s book is primarily addressed to philosophers, it is also of interest (...)
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  39.  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.
  40.  4
    Preludes to Dark Energy: Zero-Point Energy and Vacuum Speculations.Helge Kragh - 2012 - Archive for History of Exact Sciences 66 (3):199-240.
    According to modern physics and cosmology, the universe expands at an increasing rate as the result of a “dark energy” that characterizes empty space. Although dark energy is a modern concept, some elements in it can be traced back to the early part of the twentieth century. I examine the origin of the idea of zero-point energy, and in particular how it appeared in a cosmological context in a hypothesis proposed by Walther Nernst in 1916. The hypothesis of a zero-point (...)
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  41.  30
    Cosmologies with Varying Speed of Light: A Historical Perspective.Helge S. Kragh - 2006 - Studies in History and Philosophy of Modern Physics 37 (4):726-737.
  42.  9
    Constructing Quantum Mechanics, Volume 1: The Scaffold 1900-1923: By A. Duncan and M. Janssen, Oxford, Oxford University Press, 2019, Xvi + 487 Pp., 26 Plts., £65.00 (Hardback); $85.00, ISBN 978-0-19-884547-8.Helge Kragh - 2020 - Annals of Science 77 (4):552-554.
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  43. Chemistry and Technology.Helge S. Kragh - 2012 - In Jan Kyrre Berg Olsen Friis, Stig Andur Pedersen & Vincent F. Hendricks (eds.), A Companion to the Philosophy of Technology. Wiley-Blackwell.
  44. From Ørsted to Bohr:The Sciences and the Danish University System, 1800–1920.Helge Kragh - 2015 - In Kostas Gavroglu, Maria Paula Diogo & Ana Simões (eds.), Sciences in the Universities of Europe, Nineteenth and Twentieth Centuries. Springer Verlag.
     
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  45. Helmholtz and energy conservation reconsidered: Kenneth L. Caneva: Helmholtz and the conservation of energy: contexts of creation and reception. Cambridge: The MIT Press, 2021, xix+734pp, $125 HB.Helge Kragh - 2022 - Metascience 31 (1):21-24.
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  46. Krise Og Modernisme I den Teoretiske Fysik.Helge Kragh - 2009 - In Ole Hã¸Iris & Thomas Ledet (eds.), Modernitetens Verden: Tiden, Videnskab, Historien Og Kunst. Aarhus Universitetsforlag. pp. 171.
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  47. Letters to the Editor.Helge Kragh - 1994 - Centaurus 37 (4):349-354.
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  48. Lohn und Strafe in der Wissenschaft: Naturforscher im Urteil der GeschichteFranz Stuhlhofer.Helge Kragh - 1990 - Isis 81 (1):84-85.
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  49. Particle Metaphysics: A Critical Account of Subatomic Reality - by Brigitte Falkenburg.Helge Kragh - 2008 - Centaurus 50 (4):345-345.
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  50. (Review Of:) A. Pais, The Genius of Science: A Portrait of 20th Century Physicists (Oxford: Oxford University Press, 1999). [REVIEW]Helge Kragh - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33:357-359.
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