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showing 10 items of 3080 documents
Nonlinear relaxation phenomena in metastable condensed matter systems
2016
Nonlinear relaxation phenomena in three different systems of condensed matter are investigated. (i) First, the phase dynamics in Josephson junctions is analyzed. Specifically, a superconductor-graphene-superconductor (SGS) system exhibits quantum metastable states, and the average escape time from these metastable states in the presence of Gaussian and correlated fluctuations is calculated, accounting for variations in the the noise source intensity and the bias frequency. Moreover, the transient dynamics of a long-overlap Josephson junction (JJ) subject to thermal fluctuations and non-Gaussian noise sources is investigated. Noise induced phenomena are observed, such as the noise enhanced s…
Tunneling and point contact investigations of La1.85Sr0.15CuO4
1987
The high-T c superconductor La1.85Sr0.15CuO4 was investigated by means of point contact and tunneling measurements on small-sized contacts. We find different values for the energy gap at different points of the samples. The ratio 2Delta/k B T c ranges from about 3 to 6. For some point contacts we observe a clear signature of a supercurrent. Data for the temperature dependence of the critical current are presented.
Higher-order Kerr terms allow ionization-free filamentation in gases.
2010
We show that higher-order nonlinear indices ($n_4$, $n_6$, $n_8$, $n_{10}$) provide the main defocusing contribution to self-channeling of ultrashort laser pulses in air and Argon at 800 nm, in contrast with the previously accepted mechanism of filamentation where plasma was considered as the dominant defocusing process. Their consideration allows to reproduce experimentally observed intensities and plasma densities in self-guided filaments.
Spectral dependence of purely-Kerr driven filamentation in air and argon
2010
5 pags, 4 figs.-- PACS number(s): 42.65.Jx, 42.65.Tg, 78.20.Ci. -- Publisher error corrected 27 September 2010, Erratum Phys. Rev. A 82, 039905 (2010): https://doi.org/10.1103/PhysRevA.82.033826
Governance through Economic Paradigms: Addressing Climate Change by Accounting for Health
2016
"Climate change is a major challenge for sustainable development, impacting human health, wellbeing, security, and livelihoods. While the post-2015 development agenda sets out action on climate change as one of the Sustainable Development Goals, there is little provision on how this can be achieved in tandem with the desired economic progress and the required improvements in health and wellbeing. This paper examines synergies and tensions between the goals addressing climate change and economic progress. We identify reductionist approaches in economics, such as 'externalities', reliance on the metric of the Gross Domestic Product, positive discount rates, and short-term profit targets as so…
Cosmic ray composition and energy spectrum from 1–30 PeV using the 40-string configuration of IceTop and IceCube
2012
Astroparticle physics 42, 15 - 32 (2013). doi:10.1016/j.astropartphys.2012.11.003
When are researchers willing to share their data? - Impacts of values and uncertainty on open data in academia.
2020
PLOS ONE 15(7), e0234172 (2020). doi:10.1371/journal.pone.0234172
A View from the Inside: The Dawning Of De-Westernization of CEE Media and Communication Research?
2015
The Editorial outlines some characteristics of the development of the Central and Eastern European (CEE) media and communication scholarship during the past 25 years. In the majority of CEE countries, the media and communication research was re-established after the collapse of communism. Since then, a critical mass of active scholars has appeared who form an integral part of the larger European academia. A gradual integration of East and West perspectives in media and communication research is taking place along with moving away from the barely West-centred approach, and utilizing the research done by CEE scholars. Certain 'de-westernization' and internationalization of the research in ter…
Übersetzen zwischen Deutschland und Polen. Wie wird die Literatur des Nachbarlandes übersetzt, vermarktet und gelesen (1989 bis 2020)
2021
Im Jahr 2000 war Polen Gastland der Frankfurter Buchmesse, 2006 und 2017 gastierte Deutschland in Warschau, jährlich werden viele Titel in die Sprache des Nachbarn übertragen, die Übersetzer*innen beider Länder sind mittlerweile bestens vernetzt. Trotzdem zeichnet sich zurzeit eine sinkende Tendenz bei Lizenzverkäufen nach Polen ab und das Interesse an der polnischen Literatur in Deutschland schläft ein. In der Analyse wird auf die wichtigsten Aspekte in der deutsch-polnischen Übersetzungslandschaft eingegangen, darüber hinaus wird mit Verlagen und Übersetzer*innen das literarisch-translatorische Feld abgesteckt. Als Beispiel einer erfolgreichen gegenseitigen Wahrnehmung und Rezeption wird …
Reply to the “Comment by Delmelle et al. (2013) on ‘Scavenging of sulfur, halogens and trace metals by volcanic ash: The 2010 Eyjafjallajökull erupti…
2014
Abstract With this short communication we address the principal issues raised by Delmelle et al. (2014) in relation to the work of Bagnato et al. (2013) concerning the 2010 eruption of Eyjafjallajokull, Iceland. The principal conclusions of the work of Bagnato et al. (2013) include the observation that protracted gas-aerosol interaction in the plume promotes selective leaching of cation species from ash, with alkalis and Ca (and, among trace elements, Zn and Cu) being more rapidly re-mobilized (and transferred to soluble surface salts) relative to more inert elements (Mg, Ti). They also observed that adsorption onto ash surfaces is a major atmospheric sink of volcanic acidic gases, with 282…