68,481 research outputs found
A look into the picture-perfect fake life of Amalia Ulman’s Excellences and perfections
In 2014, the Spanish artist Amalia Ulman gathered inspiration from the ways of aestheticizing everyday life chosen by Instagram users to develop an elaborate performative photographic series that lasted months and existed firstly only on her personal Instagram feed @amaliaulman. In April of that year, she suddenly started posting iPhone photographs about an apparently trendy life she was living in Los Angeles, California. She started reproducing the style of different Instagram personas while incorporating the usual aesthetic choices of the social media. The narrative constructed by each of the 175 pictures accounted for her life as an artsy girl who firstly moves to LA after apparently breaking up with a boyfriend, starting work as an escort, having cosmetic plastic surgery and drug abuse issues, followed by time in rehab, and finally posts about recovery, and healthy and fitness habits. The attention to the details of what she wrote and exhibited was what probably made the almost 90 thousand subscribers she gathered along the 5 months of the performance very surprised when she finally announced it was all part of an art work entitled Excellences and Perfections. This fictional life of Amalia Ulman was thoroughly calculated to appear believable to an audience already accustomed to aesthetics of this social media visual culture by reproducing certain patterns of pictures, captions, use of hashtags and interactions with followers. This paper will analyse the performance via the Instagram archive as well as the recently published book Excellences and Perfections. (2018), discussing the ways that it deals aesthetically with questions of identity, gender, class, sexuality and “lifestyle porn” in a visual network platform. The main question to be discussed is: how did the aesthetic choices of this performance made a fake story so convincing
Black hole collisions: how far can perturbation theory go?
The computation of gravitational radiation generated by the coalescence of
inspiralling binary black holes is nowdays one of the main goals of numerical
relativity. Perturbation theory has emerged as an ubiquitous tool for all those
dynamical evolutions where the two black holes start close enough to each
other, to be treated as single distorted black hole (close limit
approximation), providing at the same time useful benchmarks for full numerical
simulations. Here we summarize the most recent developments to study evolutions
of perturbations around rotating (Kerr) black holes. The final aim is to
generalize the close limit approximation to the most general case of two
rotating black holes in orbit around each other, and thus provide reliable
templates for the gravitational waveforms in this regime. For this reason it
has become very important to know if these predictions can actually be trusted
to larger separation parameters (even in the region where the holes have
distinct event horizons). The only way to extend the range of validity of the
linear approximation is to develop the theory of second order perturbations
around a Kerr hole, by generalizing the Teukolsky formalism.Comment: 6 pages, Latex, uses moriond.sty, proceedings of the talk given at
the Moriond 99' euroconferenc
Mussolini's war of words : Italian propaganda and subversion in Egypt and Palestine, 1934-1939
This article examines Italy's attempts to export the Fascist revolution to areas formally and informally controlled by Britain. The challenge mounted by the Italian government to the British imperial structure rested upon the development of preferential relations with nationalist movements throughout the empire; such relationship would be forged by propaganda in a region, the southern and eastern shores of the Mediterranean, which was central to Mussolini’s foreign policy. The promotion of Fascist ideology among the Middle Eastern populations, and in particular in Egypt and Palestine, was driven by political priorities rather than ideological imperatives insofar as propaganda was carefully employed to expand the economic and military capacity of Fascist Italy. Thus propaganda became as early as the 1920s an instrument of foreign policy. This article also questions the effectiveness of Britain's response to the Fascist challenge: here structural problems within the British propaganda machine and intelligence community seriously undermined Britain’s defence against Axis subversion in the Middle East
Spectral features in galactic cosmic rays
Recent results by space borne experiments took cosmic ray data to a precision
level. These new results are able to challenge the conventional scenario for
cosmic ray acceleration and propagation in the Milky Way. In these
contributions, written for the XVII Vulcano Workshop, we will give an overview
of the latest results of the cosmic ray fluxes, and some possible
interpretations will be discussed. These measurements have a common feature,
namely the presence of unexpected and still not yet fully understood spectral
features.Comment: Proceedings of the XVII Vulcano Worksho
Models for Paired Comparison Data: A Review with Emphasis on Dependent Data
Thurstonian and Bradley-Terry models are the most commonly applied models in
the analysis of paired comparison data. Since their introduction, numerous
developments have been proposed in different areas. This paper provides an
updated overview of these extensions, including how to account for object- and
subject-specific covariates and how to deal with ordinal paired comparison
data. Special emphasis is given to models for dependent comparisons. Although
these models are more realistic, their use is complicated by numerical
difficulties. We therefore concentrate on implementation issues. In particular,
a pairwise likelihood approach is explored for models for dependent paired
comparison data, and a simulation study is carried out to compare the
performance of maximum pairwise likelihood with other limited information
estimation methods. The methodology is illustrated throughout using a real data
set about university paired comparisons performed by students.Comment: Published in at http://dx.doi.org/10.1214/12-STS396 the Statistical
Science (http://www.imstat.org/sts/) by the Institute of Mathematical
Statistics (http://www.imstat.org
Comment on ``Perturbative Method to solve fourth-order Gravity Field Equations"
We reconsider the cosmic string perturbative solution to the classical
fourth-order gravity field equations, obtained in Ref.\cite{CLA94}, and we
obtain that static, cylindricaly symmetric gauge cosmic strings, with constant
energy density, can contain only -terms in the first order corrections
to the interior gravitational field, while the exact exterior solution is a
conical spacetime with deficit angle .Comment: 6 pages, Revte
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