TY - THES A1 - Fritz, Thomas T1 - Emotion investigated with music of variable valence : neurophysiology and cultural influence T1 - Emotion untersucht mit Musik variabler Valenz : Neurophysiologie und kultureller Einfluss N2 - Music is a powerful and reliable means to stimulate the percept of both intense pleasantness and unpleasantness in the perceiver. However, everyone’s social experiences with music suggest that the same music piece may elicit a very different valence percept in different individuals. A comparison of music from different historical periods suggests that enculturation modulates the valence percept of intervals and harmonies, and thus possibly also of relatively basic feature extraction processes. Strikingly, it is still largely unknown how much the valence percept is dependent on physical properties of the stimulus and thus mediated by a universal perceptual mechanism, and how much it is dependent on cultural imprinting. The current thesis investigates the neurophysiology of the valence percept, and the modulating influence of culture on several distinguishable sub-processes of music processing, so-called functional modules of music processing, engaged in the mediation of the valence percept. N2 - Musik eignet sich besonders gut, um sowohl intensive Angenehmheit/Lust und Unangenehmheit/Unlust (siehe auch Wundt, 1896), so genannte Valenzperzepte, im Zuhörer hervorzurufen. Jedoch kann derselbe musikalische Stimulus sehr unterschiedliche Valenzperzepte in verschiedenen Zuhörern hervorrufen, was nahe legt, dass das durch Musik vermittelte Valenzperzept zumindest teilweise durch kulturelle Prägung moduliert wird. Ein Vergleich von Musik verschiedener historischer Perioden legt ebenfalls nahe, dass kulturelle Prägung das Valenzperzept des Hörers bei der Wahrnehmung von Intervallen und Harmonien moduliert. Wichtigerweise ist es nach wie vor weitgehend unbekannt, inwiefern das Valenzperzept von physikalischen Eigenschaften des Stimulus (z.B. Rauhigkeit) abhängt - und daher auf einem universellen perzeptiven Mechanismus basiert - oder wie sehr es abhängt von kultureller Prägung. Die vorliegende Dissertation untersucht die Neurophysiologie des Valenzperzepts, sowie den modulierenden Einfluss von Kultur auf mehrere funktionelle Module der Musikwahrnehmung (voneinander unterscheidbare Subprozesse der Musikwahrnehmung), die bei der Entstehung des Valenzperzepts beteiligt sind. KW - Amygdala KW - Emotion KW - Konsonanz KW - Dissonanz KW - Basisemotion KW - emotional expression KW - amygdala KW - consonance KW - basic emotion KW - dissonance Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-29114 ER - TY - GEN A1 - Fritz, Michael A1 - Opel, Thomas A1 - Tanski, George A1 - Herzschuh, Ulrike A1 - Meyer, Hanno A1 - Eulenburg, A. A1 - Lantuit, Hugues T1 - Dissolved organic carbon (DOC) in Arctic ground ice T2 - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe N2 - Thermal permafrost degradation and coastal erosion in the Arctic remobilize substantial amounts of organic carbon (OC) and nutrients which have accumulated in late Pleistocene and Holocene unconsolidated deposits. Permafrost vulnerability to thaw subsidence, collapsing coastlines and irreversible landscape change are largely due to the presence of large amounts of massive ground ice such as ice wedges. However, ground ice has not, until now, been considered to be a source of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC) and other elements which are important for ecosystems and carbon cycling. Here we show, using biogeochemical data from a large number of different ice bodies throughout the Arctic, that ice wedges have the greatest potential for DOC storage, with a maximum of 28.6 mg L-1 (mean: 9.6 mg L-1). Variation in DOC concentration is positively correlated with and explained by the concentrations and relative amounts of typically terrestrial cations such as Mg2+ and K+. DOC sequestration into ground ice was more effective during the late Pleistocene than during the Holocene, which can be explained by rapid sediment and OC accumulation, the prevalence of more easily degradable vegetation and immediate incorporation into permafrost. We assume that pristine snowmelt is able to leach considerable amounts of well-preserved and highly bioavailable DOC as well as other elements from surface sediments, which are rapidly frozen and stored in ground ice, especially in ice wedges, even before further degradation. We found that ice wedges in the Yedoma region represent a significant DOC (45.2 Tg) and DIC (33.6 Tg) pool in permafrost areas and a freshwater reservoir of 4200 km(2). This study underlines the need to discriminate between particulate OC and DOC to assess the availability and vulnerability of the permafrost car-bon pool for ecosystems and climate feedback upon mobilization. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 493 KW - last glacial maximum KW - Beaufort Sea coast KW - Cape Mamontov Klyk KW - permafrost carbon KW - Laptev Sea KW - Lyakhovsky Island KW - climate-change KW - old carbon KW - hologene KW - Siberia Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-408155 SN - 1866-8372 IS - 493 ER -