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- Author or Editor: Péter Lautner x
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The aim of the paper is to show that the two testimonies on Andronicus' theory of physical change give a coherent picture. Both accounts stress that the factor responsible for change is not necessarily to be sought for outside of the things that change. Their change is due as much to their inner constitution as to external agents. Andronicus' view resembles Galen's critique of the Aristotelian position and there is a possibility that both authors drew on Stoic sources.
Abstract
The paper has a dual purpose, one historical and one theoretical. It aims to show, first, that Plotinus' notion of perceptual memory heavily draws on Stoic views insofar as both regard memory as a linguistic phenomenon. Furthermore, it aims to answer two questions, both are intimately connected to the Plotinian thesis of the impassibility of the soul. How could it happen that a present tense perceptual judgment changes into a past tense memory judgment and what explains that our judgments on perceived objects change, and occasionally fade, over time, that is, how can we remember in a way different from sense-perception?
This part is a collection of short book reviews from the following authors: Biagio D'Angelo: Milongas y otros ritmos, Maria Luiza Guarnieri Atik: Vicente do Rego Monteiro-um brasileiro da França, Luciano Morbiato (ed.): Scartafaccio d'agricoltura. Manoscritto di un contadino di Spiné di Oderzo (1805-1810), Paul Richard Blum: Philosophieren in der Renaissance, Edit Bors: Az idő poétikája az önéletírásban. Rousseau, Gide, Sartre önéletírásának szövegnyelvészeti-pragmatikai elemzése.
Abstract
Ferromagnetic grains in airborne dust are important indicators of vehicle traffic, some industrial sources and combustion/heating. Settled dust consists mainly of diamagnetic material; therefore accessory ferromagnetic grains are readily indicated by magnetic measurements. In this paper settled dust samples collected on a monthly basis in the years 2008–2011 were studied. Non-destructive magnetic measurements were followed by geochemical and mineralogical analyses. In selected samples we identified airborne anthropogenic materials (e.g. silicate and magnetite spherules), minerals from the natural environment and organic material. Seasonally appearing materials (e.g. soot in winter, plant fragments and pollen in summer) increased the mass of the settled dust, but not the magnetic susceptibility. Thus, we realized that the generally interpreted mass susceptibility in environmental magnetic studies would not always appropriately characterize the magnetic pollution. In the interpretation we gave preference to total susceptibility because of its direct connection to the pollution, except in comparison with metal concentrations.
Trends in magnetic pollution were eventually analyzed for 19 sampling sites. Irrespective of the degree and source of the pollution the monthly variation curves of magnetic susceptibility exhibit a general maximum (March-April), followed by gradual decrease. A corresponding peak is observed in the amounts of dust. Both can be explained by re-suspension of dust settled in winter. The additional maxima in the mass of the dust (June and August, respectively) are probably due to contribution from vegetation and/or an artifact from algaecide. For three key sampling sites comparison was made between the concentrations of 12 metals and the respective mass susceptibilities and good linear correlation was found for Fe, Mn and Zn for all, for Cr, Cu, Pb, V, Ba, Sr and Zr for two sampling sites. Cd, which is enriched in all samples, does not correlate with the magnetic susceptibility.