Search results for " black"
showing 10 items of 317 documents
A study on the sensitivities of simulated aerosol optical properties to composition and size distribution using airborne measurements
2014
We present a flexible framework to calculate the optical properties of atmospheric aerosols at a given relative humidity based on their composition and size distribution. The similarity of this framework to climate model parameterisations allows rapid and extensive sensitivity tests of the impact of uncertainties in data or of new measurements on climate relevant aerosol properties. The data collected by the FAAM BAe-146 aircraft during the EUCAARI-LONGREX and VOCALS-REx campaigns have been used in a closure study to analyse the agreement between calculated and measured aerosol optical properties for two very different aerosol types. The agreement achieved for the EUCAARI-LONGREX flights is…
High performance composites containing perfluoropolyethers-functionalized carbon-based nanoparticles: Rheological behavior and wettability
2016
Abstract Ultra High Molecular Weight Polyethylene (UHMWPE) based composites filled with carbon nanotubes (CNTs) and carbon black (CB) modified by perfluoropolyethers (PFPE) have been formulated. All composites show a segregated morphology with nanofillers selectively localized at the polymer particle–particle interface. The composites rheological properties have been deeply investigated: the PFPE functionalities linked on CNTs facilitate the semi-3D nanofillers network formation in the composites that show a solid-like behaviour even at lower investigated filler contents, reaching the rheological percolation threshold at lower nanofiller content than bare CNTs filled composites. For composi…
Re-inscriptions of the Black British Identity Mosaic in Bernardine Evaristo’s Early Fiction
2010
Bernardine Evaristo’s Lara: Transnational Axes of Identity Articulation
2010
Bernardine Evaristo’s The Emperor’s Babe: Re-Narrating Roman Britannia; De-Essentializing British National Identity
2014
The essay aims to demonstrate that, by representing the Black group as integral to British history, Bernardine Evaristo's The Emperor’s Babe imaginatively intervenes into the contemporary transmission of European history by unseating the conventional notion of racial purity on which the Western historical archive has been built. The novel thus questions hegemonic notions of Britishness and simultaneously re-inscribes them by offering new inclusive configurations of the British identity. Evaristo’s complex articulation of inter- and intra-gender power relations prevents the novel from developing the ethnic motif in simplistic celebratory terms and simultaneously enables the narrative to intr…
Postfazione a E. C. Osondu, Quando il cielo vuole spuntano le stelle
2020
The Postface to E. C. Osondu's most recent novel offers a commentary on this Bildungsroman, whose protagonist is a young man from an unknown African country who leaves home behind to reach Europe hoping in a better world. Although narrated in a lyrical tone, the protagonist's epic journey resonates with the actual stories of the uncountable young African men who in the past years have crossed the Black Mediterranean.
Electric and elastic properties of conductive polymeric nanocomposites on macro- and nanoscales
2002
Abstract In the past several years, the macroscopic electric and elastic properties of conductive polymeric composites have been studied from the viewpoint of such applications as thermistors and pressure sensors. In particular, we studied carbon black (CB) polymeric nanocomposites on macro- and nanoscales, using polyisoprene as the composite matrix. The filler component was an extra conductive carbon black (PRINTEX XE2, DEGUSSA) with a primary particle diameter of about 30 nm. A very strong reversible tensoresistive effect of electric resistance dependence on uniaxial tension deformation was observed in composites with the 10 carbon black mass parts added to 100 mass parts of polyisoprene.…
Deconstruction and Re-writing of Englishness and the European Cultural Identity in Bernardine Evaristo's Narrative
2011
If analysed through a theoretical grid whose critical paradigms originate within an analytical area where British cultural studies, gender and postcolonial studies interweave Bernardine Evaristo's fictions shows peculiar narrative strategies – in terms of genre, stylistic experimentation (novels-inverse and a novel-with-verse) and inspiring motifs – which allow her (from the specific perspective of an ANglo-Nigerian London-born wiman writer of mixed origins) to intervene within traditionally hegemonic representational circuits – be they British or European – so contributing to re-write/re-right the notion of English national identity and to re-examine European history from new nonexclusiona…
Black hole lightning due to particle acceleration at subhorizon scales
2015
Supermassive black holes with masses of millions to billions of solar masses are commonly found in the centers of galaxies. Astronomers seek to image jet formation using radio interferometry, but still suffer from insufficient angular resolution. An alternative method to resolve small structures is to measure the time variability of their emission. Here, we report on gamma-ray observations of the radio galaxy IC 310 obtained with the MAGIC telescopes revealing variability with doubling time scales faster than 4.8 min. Causality constrains the size of the emission region to be smaller than 20\% of the gravitational radius of its central black hole. We suggest that the emission is associated …
Non-supersymmetric Extremal Black Holes: First-Order Flows and Stabilisation Equations
2013
We review the results of [1, 2] on reducing the second-order equations of motion for stationary extremal black holes in four-dimensional \({\textit{N}}\,=\,2\) supergravity to first-order flow equations and further to non-differential stabilisation equations.