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Ursula Klein [20]U. Klein [7]Udo Klein [2]Ulrich F. G. Klein [1]
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Profile: Udo Klein
  1. Marcus Kracht & Udo Klein (2014). The Grammar of Code Switching. Journal of Logic, Language and Information 23 (3):313-329.
    The idea that language is a homogeneous code is a massive simplification. In actual fact, we constantly use a wide array of codes, be they other languages, dialects, registers, or special purpose codes . In this paper we provide a formal analysis of code switching.
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  2. Udo Klein (2012). Contextually Enriched Argument Linking. In Rita Finkbeiner, Jörg Meibauer & Petra Schumacher (eds.), What is a Context?: Linguistic Approaches and Challenges. John Benjamins Pub. Co.. 196--199.
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  3. Ursula Klein (2012). Artisanal-Scientific Experts in Eighteenth-Century France and Germany. Annals of Science 69 (3):303-306.
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  4. Ursula Klein (2012). Objects of Inquiry in Classical Chemistry: Material Substances. [REVIEW] Foundations of Chemistry 14 (1):7-23.
    I argue in the paper that classical chemistry is a science predominantly concerned with material substances, both useful materials and pure chemical substances restricted to scientific laboratory studies. The central epistemological and methodological status of material substances corresponds with the material productivity of classical chemistry and its way of producing experimental traces. I further argue that chemist’s ‘pure substances’ have a history, conceptually and materially, and I follow their conceptual history from the Paracelsian concept of purity to the modern concept (...)
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  5. Ursula Klein (2012). Savant Officials in the Prussian Mining Administration. Annals of Science 69 (3):349-374.
    Summary In the second half of the eighteenth century, the Prussian State supported savants who combined learned inquiry into nature with technical work. Members of the physical and mathematical classes of the Royal Prussian Academy of Sciences were involved in State projects such as surveying for the construction of canals, chemical analysis of Silesian iron, production of porcelain and of beet sugar. Some of these men were truly ?hybrid? experts living both in the worlds of State-directed manufacture and academic natural (...)
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  6. Ursula Klein (2012). The Prussian Mining Official Alexander von Humboldt. Annals of Science 69 (1):27-68.
    Summary From summer 1792 until spring 1797, Alexander von Humboldt was a mining official in the Franconian parts of Prussia. He visited mines, inspected smelting works, calculated budgets, wrote official reports, founded a mining school, performed technological experiments, and invented a miners? lamp and respirator. At the same time he also participated in the Republic of Letters, corresponded with savants in all Europe, and was a member of the Leopoldine Carolinian Academy and the Berlin Gesellschaft Naturforschender Freunde. He collected minerals, (...)
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  7. U. Klein (2009). Schrödinger's Equation with Gauge Coupling Derived From a Continuity Equation. Foundations of Physics 39 (8):964-995.
    A quantization procedure without Hamiltonian is reported which starts from a statistical ensemble of particles of mass m and an associated continuity equation. The basic variables of this theory are a probability density ρ, and a scalar field S which defines a probability current j=ρ ∇ S/m. A first equation for ρ and S is given by the continuity equation. We further assume that this system may be described by a linear differential equation for a complex-valued state variable χ. Using (...)
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  8. Ursula Klein (2007). Styles of Experimentation and Alchemical Matter Theory in the Scientific Revolution. Metascience 16 (2):247-256.
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  9. Ursula Klein (2005). Experiments at the Intersection of Experimental History, Technological Inquiry, and Conceptually Driven Analysis: A Case Study From Early Nineteenth-Century France. Perspectives on Science 13 (1):1-48.
    : The paper examines differences of styles of experimentation in the history of science. It presents arguments for a historization of our historial and philosophical notion of "experimentation," which question the common view that "experimental philosophy" was the only style of experimentation in the eighteenth and early nineteenth centuries. It argues, in particular, that "experimental history" and technological inquiry were accepted styles of academic experimentation at the time. These arguments are corroborated by a careful analysis of a case study, which (...)
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  10. Ursula Klein (2005). Experimentelle Wissenschaften und Werkstättentradition. In Gereon Wolters & Martin Carrier (eds.), Homo Sapiens Und Homo Faber. De Gruyter. 113.
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  11. Ursula Klein (2005). Introduction: Technoscientific Productivity. Perspectives on Science 13 (2):139-141.
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  12. Ursula Klein (2005). Shifting Ontologies, Changing Classifications: Plant Materials From 1700 to 1830. Studies in History and Philosophy of Science Part A 36 (2):261-329.
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  13. Ursula Klein (2005). Technoscience. Perspectives on Science 13 (2).
    : I argue and demonstrate in this essay that interconnected systems of science and technology, or technoscience, existed long before the late nineteenth century, and that eighteenth-century chemistry was such an early form of technoscience. Based on recent historical research on the early development of carbon chemistry from the late 1820s until the 1840s—which revealed that early carbon chemistry was an experimental expert culture that was largely detached from the mundane industrial world—I further examine the question of the internal preconditions (...)
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  14. Ursula Klein (2005). Technoscience avant la lettre. Perspectives on Science 13 (2):226-266.
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  15. Ursula Klein (2004). Working and Knowing in the History of STM. Studies in History and Philosophy of Science Part A 35 (1):159-172.
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  16. U. Klein (2003). Experimental History and Herman Boerhaave's Chemistry of Plants. Studies in History and Philosophy of Science Part C 34 (4):533-567.
    In the early eighteenth century, chemistry became the main academic locus where, in Francis Bacon's words, Experimenta lucifera were performed alongside Experimenta fructifera and where natural philosophy was coupled with natural history and 'experimental history' in the Baconian and Boyleian sense of an inventory and exploration of the extant operations of the arts and crafts. The Dutch social and political system and the institutional setting of the university of Leiden endorsed this empiricist, utilitarian orientation toward the sciences, which was forcefully (...)
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  17. Ursula Klein (2003). Chemical Combination: A Return to Aristotle? [REVIEW] Metascience 12 (2):198-200.
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  18. Ursula Klein (2003). Donald Gillies. In M. C. Galavotti (ed.), Observation and Experiment in the Natural and Social Sciences. Springer Netherlands. 232--199.
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  19. U. Klein (2002). Corrigendum. Erkenntnis 57 (1):133-136.
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  20. U. Klein (2002). Review of'Philosophy of Chemistry', by J. Van Brakel (Vol 56, 2001). [REVIEW] Erkenntnis 57 (1):133-136.
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  21. U. Klein (2002). Van Brakel, J., Philosophy of Chemistry, Leuven University Press, Leuven. Erkenntnis 56 (2):252-256.
  22. M. Chayut, J. Edwards, C. J. Giunta, U. Klein, H. Kragh, P. Laszlo, S. Le Vent, V. N. Ostrovsky, N. Psarros & S. Psillos (2001). Authors Index Volume 3. Foundations of Chemistry 3 (273).
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  23. U. Klein (2001). Paper Tools in Experimental Cultures. Studies in History and Philosophy of Science Part A 32 (2):265-302.
    The paper studies various functions of Berzelian formulas in European organic chemistry prior to the mid-nineteenth century from a semiotic, historical and epistemological perspective. I argue that chemists applied Berzelian formulas as productive 'paper tools' for creating a chemical order in the 'jungle' of organic chemistry. Beginning in the late 1820s, chemists applied chemical formulas to build models of the binary constitution of organic compounds in analogy to inorganic compounds. Based on these formula models, they constructed new classifications of organic (...)
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  24. Ursula Klein (2001). Berzelian Formulas as Paper Tools in Early Nineteenth-Century Chemistry. Foundations of Chemistry 3 (1):7-32.
    This paper studies the semiotic,epistemological and historical aspects of Berzelianformulas in early nineteenth-century organicchemistry. I argue that Berzelian formulas wereenormously productive `paper tools' for representingchemical reactions of organic substances, and forcreating different pathways of reactions. Moreover, myanalysis of Jean Dumas's application of Berzelianformulas to model the creation of chloral from alcoholand chlorine exemplifies the role played by chemicalformulas in conceptual development (the concept ofsubstitution). Studying the dialectic of chemists'collectively shared goals and tools, I argue thatpaper tools, like laboratory instruments, areresources (...)
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  25. Ursula Klein (1996). Experiment, Spiritus und okkulte Qualitäten in der Philosophie Francis Bacons. Philosophia Naturalis 33 (2):289-315.
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  26. Ursula Klein (1996). The Chemical Workshop Tradition and the Experimental Practice: Discontinuities Within Continuities. Science in Context 9 (3).
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  27. Ursula Klein (1995). Die Anfänge der neuzeitlichen Chemie in der Pharmazie und Metallurgie. Zu E.F. Geoffroys tabelle stofflicher Beziehungen. [REVIEW] NTM International Journal of History and Ethics of Natural Sciences, Technology and Medicine 3 (1):167-191.
    E.F. Geoffroy's table of different relations ( rapports ) between different chemical substances is mainly based on empirical knowledge accumulated in 16th and 17th century metallurgy and pharmacy. The substances listed in the left half of the table were basic for the formation of salts which were produced for medical ends in the chemical-pharmaceutical practice of the 17th century. The right half of the table refers to substances and operations of metallurgy which had already been described in the metallurgical writings (...)
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  28. Ursula Klein (1994). Origin of the Concept Chemical Compound. Science in Context 7 (2).
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  29. Ursula Klein (1994). Robert Boyle―Der Begründer der neuzeitlichen Chemie? Philosophia Naturalis 31 (1):63-106.
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  30. Ulrich F. G. Klein (1991). Focus: An Idea in Motion. Journal of Semantics 8 (1-2):71-90.
    This paper discusses stress patterns concerning the relation between intonation and the meaning of an utterance. It is argued that this should be done within a linguistic approach. While the first part of this paper deals with differences in meaning that are caused by differences in intonation, the second part gives an overview over the focus theories of Hohle, Rochemont, and Jacobs. Within this discussion the interrelation is shown between the syntactic feature (+F) (+focus) and the phonetic and semantic properties (...)
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