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  1. Michael Drieschner (2015). A Note on the Quantum Mechanical Measurement Process. Philosophia Naturalis 50 (2):201-213.
    Traditionally one main emphasis of the quantum mechanical measurement theory is on the question how the pure state of the compound system 'measured system + measuring apparatus' is transformed into the 'mixture' of all possible results of that measurement, weighted with their probability: the so-called “disappearance of the interference terms”. It is argued in this note that in reality there is no such transformation, so that there is no need to account for such a transformation theoretically. _German_ Gewöhnlich liegt ein (...)
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  2. Alexander Ehmann (2015). Messung und Invarianz – ein Beitrag zum Metrologischen Strukturenrealismus. Philosophia Naturalis 50 (2):215-251.
    [ENGLISH] The present article is a contribution to the development of metrological structural realism (MSR). This position of philosophy of science goes back to Matthias Neuber, who introduces it as a third variation of the main structural realisms: epistemic structural realism (ESR) and ontic structural realism (OSR). Here, Neuber attempts to tackle the problems of OSR and ESR while preserving their respective strengths. Of central importance to his approach, are the concepts of invariance, structure and, especially, measurement. Starting from Eino (...)
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  3. David Hommen (2015). Negative Properties, Real and Irreducible. Philosophia Naturalis 50 (2):383-406.
    Few philosophers believe in the existence of so-called negative properties. Indeed, many find it mind-boggling just to imagine such properties. In contrast, I think not only that negative properties are quite imaginable, but also that there are good reasons for believing that some such properties actually exist. In this paper, I want to defend the reality and irreducibility, or genuineness, as I call it, of negative properties. After briefly presenting the idea of a negative property, I collect commonly invoked tests (...)
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  4. Andrej Krause (2015). Bolzano über Inbegriffe von Substanzen. Philosophia Naturalis 50 (2):365-381.
    The paper analyzes one important aspect of Bernard Bolzano's ontology, namely his concept of collections of substances. It deals first with his concept of substance and it examines the relation between substances and collections of substances. It discusses further his distinction between continuous and non-continuous collections of substances, especially his concept of material things. Finally, it treats his concept of the world. According to Bolzano, the world is the continuous collection of all dependent substances. The acceptance of a collection which (...)
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  5. Ladislav Kvasz (2015). Heidegger's Interpretation of Mathematical Science in the Light of Husserl's Concept of Mathematization in the Krisis. Philosophia Naturalis 50 (2):337-363.
    There are many interpretations of the birth of modern science. Most of them are, nevertheless, confined to the analysis of certain historical episodes or technical details, while leaving the very notion of mathematization unanalyzed. In my opinion this is due to a lack of a proper philosophical framework which would show the process of mathematization as something radically new. Most historians assume that the world is just like it is depicted by science. Thus they are not aware of the radical (...)
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  6. Lukas Nickel & Tobias Jung (2015). Messung und Unschärfe in der klassischen Physik. Philosophia Naturalis 50 (2):253-275.
    There is the widely held view that quantum physics differs fundamentally from classical physics regarding measurements. In order to prepare the ground for settling this question we discuss the consequences it has for classical physics if one includes measurement in the theory. After explaining the terms measurement and error it is argued that every measurement can be reduced to a measurement of length and/or number. Additionally to the wellknown statistical and systematical errors we introduce the concept of classical uncertainty which (...)
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  7. Matias Slavov (2015). Newton's Law of Universal Gravitation and Hume's Conception of Causality. Philosophia Naturalis 50 (2):277-305.
    This article investigates the relationship between Hume’s causal philosophy and Newton’s philosophy of nature. I claim that Newton’s experimentalist methodology in gravity research is an important background for understanding Hume’s conception of causality: Hume sees the relation of cause and effect as not being founded on a priori reasoning, similar to the way that Newton criticized non - empirical hypotheses about the properties of gravity. However, according to Hume’s criteria of causal inference, the law of universal gravitation is not a (...)
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  8. Anne Christina Thaeder (2015). John Herschel und der Newton des Grashalms. Philosophia Naturalis 50 (2):307-335.
    In this article I would like to show that Charles Darwin conscientiously developed his theory of natural selection conforming to criteria of John Herschel, one of the leading philosophers of science at his time. Therefor I will present Herschel's methodology and search for the criteria in Darwin's _Origin of Species_. I conclude with Herschel's negative reaction to Darwin's theory, showing that Herschel himself probably could not comply with his own criteria. _German_ In diesem Aufsatz möchte ich zeigen, dass sich Charles (...)
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  9. Friedel Weinert (2015). EPR and the 'Passage' of Time. Philosophia Naturalis 50 (2):173-199.
    The essay revisits the puzzle of the 'passage' of time in relation to EPR-type measurements and asks what philosophical consequences can be drawn from them. Some argue that the lack of invariance of temporal order in the measurement of a space-like related EPR pair, under relativistic motion, casts serious doubts on the 'reality' of the lapse of time. Others argue that certain features of quantum mechanics establish a tensed theory of time – understood here as Possibilism or the growing block (...)
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