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  • English  (64,597)
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  • 2020-2024  (71,638)
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  • 1
    Publication Date: 2024-06-26
    Description: All datasets provided in the operational dataset (Heubeck et al., 2024) of the ICDP project BASE (ICDP 5069) consist of metadata, data and/or images. Here, a summary of explanations of the tables, data and images exported from the database of the project (mDIS BASE) are given and are complimented by additional information on data from measurements done in the laboratory prior to the sampling party. Finally, the sampling data from the first two sam-pling parties are added. Some basic definitions of identifiers used in ICDP, depths corrections and measurements are also introduced.
    Language: English
    Type: info:eu-repo/semantics/report
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  • 2
    Publication Date: 2024-06-25
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: German
    Type: bookpart , doc-type:bookPart
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  • 3
    Publication Date: 2024-06-25
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: English
    Type: report , doc-type:report
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  • 4
    Publication Date: 2024-06-25
    Description: Der Abschlussbericht beschreibt den von den Autoren wissenschaftlich betreuten Strategieprozess zur Implementierung und Fortschreibung des Deutschen Ressourceneffizienzprogramms ProgRess während der Projektlaufzeit. Wesentliche Prozesselemente sind ⁠Monitoring⁠ und Evaluation des Programms, die Einbindung von Stakeholdern aus Forschung, Wirtschaft, Politik und Zivilgesellschaft mit Hilfe der NaRess-Plattform und ihrer Arbeitsgruppen sowie die Erstellung zahlreicher Vertiefungsanalysen und Positionspapiere zu aktuellen Themen der Ressourcenpolitik. Die Publikation richtet sich an Entscheidungsträger aus allen Verwaltungsebenen, die ein laufendes Ressourceneffizienzprogramm oder eine vergleichbare rohstoffbezogene Strategie auf den Weg bringen oder begleiten.
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: German
    Type: report , doc-type:report
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  • 5
    Publication Date: 2024-06-25
    Description: Dieser Bericht befasst sich mit dem ⁠Monitoring⁠ und der Evaluation von ProgRess III. Der Bericht geht über die Analyse der Ressourceneffizienz auf volkswirtschaftlicher Ebene hinaus und evaluiert insbesondere die Umsetzung der Maßnahmen, die mit ihnen verbundenen Effekte und die zugrundeliegenden Erfolgsfaktoren. Dazu wurde ein zweistufiges Verfahren durchgeführt: ein Monitoring und eine Evaluation des Programms. Nach einer Einführung in die Ziele der Evaluation und der Abgrenzung zum zuvor durchgeführten Monitoring (Kap. 1) werden die Forschungsfragen und die Elemente eines erfolgreichen Politikmix, wie er in der theoretischen Forschung diskutiert und konzipiert wird, kurz erörtert (Kap. 2). Dann werden die Methoden (Analyse, Interviews, Webcrawling) und der Fahrplan der Evaluation vorgestellt (Kap. 3). Zwei Wirkungsmodelle, ein materielles und ein organisationales ⁠Wirkmodell⁠, bilden die Basis für die verschiedenen Betrachtungsebenen und Foki, die für die Evaluation gewählt wurden. In Kapitel 4 werden schließlich die Erkenntnisse, die durch den Einsatz der verschiedenen Methoden gewonnen wurden, in bewusst kompakter und übersichtlicher Form in Bezug zu den Evaluationskriterien dargestellt und Empfehlungen abgeleitet. Kapitel 5 widmet sich der Gesamtbewertung der Effektivität von ProgRess III und Kapitel 6 bearbeitet abschließend die Frage, welche Entwicklungspotenziale aus den gewonnenen Erkenntnissen abgeleitet werden können.
    Keywords: ddc:320
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: German
    Type: report , doc-type:report
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  • 6
    Publication Date: 2024-06-21
    Description: Large igneous provinces (LIP) are vast (0.2 to 〉1 Mkm3) outpourings of basaltic lava and voluminous intrusions of magmas that have had important environmental consequences, in many cases leading to immense greenhouse gas release and mass extinctions. Magmatic oxygen fugacity (fO2) influences the chemistry of volcanic gases and is an important parameter for examining the links between LIP eruptions and environmental change. To constrain the fO2 of LIP magmas, we report olivine elemental chemistry of 399 crystals from a set of fifteen olivine-rich LIP samples, spanning in age from the Proterozoic (∼1270 Ma) to the Miocene (∼17 Ma). Concentrations of V in olivine are used to show that mafic LIP lavas erupted at +1.20 ± 0.95 ΔFMQ, on average more oxidized than mid ocean ridge basalts (MORB) at −0.28 ± 0.28 ΔFMQ. Mafic LIP magmas show a much larger range than MORB, however. Additionally, fO2 shows a negative correlation with parental magma MgO content, with high MgO lavas approaching the MORB range. This correlation is likely due to sampling of a heterogeneous mixture of oxidized and reduced lithologies, as also sampled by ocean island basalts (OIB). Correlation between fO2 and isotopic ratios such as 143Nd/144Nd demonstrates that the oxidized endmember is geochemically enriched, and may result from subduction recycling of oxidized surficial materials. The high fO2 of primitive LIP magmas demonstrate that they largely emitted oxidized gases during eruption, and furthermore, that LIP magmas associated with mass extinctions have similar magmatic fO2 to those that are not. Global plate tectonic position, magnitude and duration of LIP volcanic eruptions and magmatic degassing, as well as interaction with sedimentary basins in the crust - but not mantle source fO2 - are likely to be the critical factors for whether a LIP was associated with a mass extinction.
    Language: English
    Type: info:eu-repo/semantics/article
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  • 7
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    In:  IOP Conference Series: Materials Science and Engineering
    Publication Date: 2024-06-21
    Description: Analysis and identifying the displacement characteristics play a key role in timely monitoring and detecting the physical responses of the bridge to ensure the safety of the human and structure. Many previous kinds of research used GNSS data to identify displacement and oscillation modelling of the bridge with different algorithms. This study uses GNSS time-series data to determine linear displacement and model oscillation of the bridge using a procedure including filtering outliers, linear regression, and sin function to identify amplitude in three directions, the plane displacement velocity, spatial displacement velocity, and vibration model of the bridge. The data in the research in the GNSS time-series data from three P5 GNSS receivers of the CHC brand on the Dachongyong bridge in Nanning, China with 1646 observations, at one-hour sample intervals in 68 consecutive days. The plane and spatial velocity of the three points DCQ01, DCQ02, and DCQ03 is 0.0181 mm/h, 0.0185 mm/h; 0.0114 mm/h, 0.0173 mm/h; and 0.0071 mm/h, 0.0082 mm/h respectively. The study results are significant in analyzing and identifying the bridge's displacement characteristics.
    Language: English
    Type: info:eu-repo/semantics/article
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  • 8
    Publication Date: 2024-06-21
    Description: Double seismic zones (DSZs) are a feature of some subducting slabs, where intermediate-depth earthquakes (~70–300 km) align along two separate planes. The upper seismic plane is generally attributed to dehydration embrittlement, whereas mechanisms forming the lower seismic plane are still debated. Thermal conductivity of slab minerals is expected to control the temperature evolution of subducting slabs, and therefore their seismicity. However, effects of the potential anisotropic thermal conductivity of layered serpentine minerals with crystal preferred orientation on slab’s thermal evolution remain poorly understood. Here we measure the lattice thermal conductivity of antigorite, a hydrous serpentine mineral, along its crystallographic b- and c-axis at relevant high pressure-temperature conditions of subduction. We find that antigorite’s thermal conductivity along the c-axis is ~3–4 folds smaller than the b-axis.Our numericalmodels further reveal thatwhen the lowthermal-conductivity c-axis is aligned normal to the slab dip, antigorite’s strongly anisotropic thermal conductivity enables heating at the top portion of the slab, facilitating dehydration embrittlement that causes the seismicity in the upper plane of DSZs. Potentially, the antigorite’s thermal insulating effect also hinders the dissipation of frictional heat inside shear zones, promoting thermal runaway along serpentinized faults that could trigger intermediatedepth earthquakes.
    Language: English
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  • 9
    Publication Date: 2024-06-21
    Description: Tourmaline is common in rare element pegmatites of the Nb-Y-F (NYF) type in the south-central part of the Proterozoic Sveconorwegian orogen in southern Norway. In the global context, however, tourmaline appears rare in this type of pegmatite. This study aims to explain the unusual tourmaline abundance in these pegmatites and the origin of boron (B) in the respective melts, and to raise awareness of tourmaline in NYF pegmatites generally. Tourmalines from six pegmatites in three Sveconorwegian lithotectonic units: Bamble, Kongsberg and Idefjorden, were investigated in terms of their mineral chemistry and δ11B values, in addition to bulk rock analyses of pegmatites and host rocks. Tourmalines in pegmatites from Bamble and Kongsberg record B isotopic compositions (δ11B = -1.0 to + 9.9 ‰) that are heavy relative to continental crust and mantle sources. In contrast, tourmaline in pegmatites and host rocks from Idefjorden have light B isotopic ratios (δ11B = -14.8 to −12.5 ‰) that are typical crustal values. We suggest that the latter melts were sourced from orthogneisses at depth. We relate the heavy B isotopic composition of Bamble and Kongsberg pegmatites to regional Na-metasomatism by fluids sourced from Mesoproterozoic shallow marine sediments. This is supported by previously published δ11B ratios from metasomatized Bamble host rocks. The spatial association of pegmatites with Na-metasomatism in the basement rocks suggests that metasomatism enhanced the fertility and B-concentration in the affected lithologies, favouring partial melting and the formation of tourmaline-bearing pegmatites. These findings contribute to understanding the petrogenesis of Sveconorwegian pegmatites but they also imply that B can play a greater role in the formation of NYF pegmatites than previously thought and that tourmaline has value as a petrogenetic tool in this type of pegmatites as well as in the Li-Cs-Ta (LCT) type to which is it is more commonly applied.
    Language: English
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  • 10
    Publication Date: 2024-06-21
    Description: Opinion formation within society follows complex dynamics. Towards its understanding, axiomatic theory can complement data analysis. To this end we propose an axiomatic model of opinion formation that aims to capture the interaction of individual conviction with social influence in a minimalist fashion. Despite only representing that (1) agents have an initial conviction with respect to a topic and are (2) influenced by their neighbours, the model shows emergence of opinion clusters from an initially unstructured state. Here, we show that increasing individual self-reliance makes agents more likely to align their socially influenced opinion with their inner conviction which concomitantly leads to increased polarisation. The opinion drift observed with increasing self-reliance may be a plausible analogue of polarisation trends in the real world. Modelling the basic traits of striving for individual versus group identity, we find a trade-off between individual fulfilment and societal cohesion. This finding from fundamental assumptions can serve as a building block to explain opinion polarisation.
    Language: English
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