12,067 research outputs found
Book review: happiness and social policy in Europe edited by Bent Greve
Happiness has become a central research issue in recent years, and this book brings together researchers from around Europe to present, analyse and discuss the relationship between happiness and social policy. Pierpaolo Perna finds a very informative and insightful collection of essays, and recommends it for policymakers, researchers and academics interested in combining economics, psychology and sociology
Strategies for EU survival: bind states to cooperate, improve democratic legitimacy, and make the decision making process more efficient
Public unease with the European Union, Euro problems, and dysfunctional institutions give rise to the real danger that the EU will become increasing irrelevant, just as its member states face more and more challenges in a globalised world. Jean-Claude Piris, a leading figure in the conception and drafting of the EU’s legal structures, works through the options available in light of the economic and political climate, assessing their effectiveness. Reviewed by Pierpaolo Perna. The Future of Europe: Towards a Two-Speed EU? Jean-Claude Piris. Cambridge University Press. December 2011
From Smart Cities To Playable Cities. Towards Playful Intelligence In The Urban Environment
In the last decade, we have seen the rise of urban play as a tool for community building, and city-making and Western society is actively focusing on play/playfulness and intelligent systems as a way to approach complex challenges and emergent situations.
In this paper, we aim to initiate a dialogue between game scholars and architects. Like many creative professions, we believe that the architectural practice may benefit significantly from having more design methodologies at hand, thus improving lateral thinking. We aim at providing new conceptual and operative tools to discuss and reflect on how games and smart systems facilitate long-term the shift from the Smart Cities to the Playable one, where citizens/players have the opportunity to hack the city and use the smart city’s data and digital technology for their purposes to reactivate the urban environment
Gamma-ray Burst Remnants: How can we find them?
By now there is substantial evidence that Gamma-Ray Bursts (GRBs) originate
at cosmological distances from very powerful explosions. The interaction
between a GRB and its surrounding environment has dramatic consequences on the
environment itself. At early times, the strong X-ray UV afterglow flux
photoionizes the medium on distance scales on the order of 100 pc or more. Here
I discuss the long-term effects resulting from the interaction between a GRB
and its environment, and in particular the signatures of the emission spectrum
produced while the heated and ionized gas slowly cools and recombines. Besides
photoionizing the medium with its afterglow, a GRB explosion drives a blast
wave which is expected to have a very long lifetime. I discuss possible
candidates for such GRB remnants in our own and in nearby galaxies, and ways to
distinguish them from remnants due to other phenomena, such as multiple
supernova (SN) explosions.Comment: 3 pages, to appear in the proceedings of the 2nd Workshop "Gamma-Ray
Bursts in the Afterglow Era",Rome,Oct.17-20,200
Moduli spaces of abstract and embedded Kummer varieties
In this paper, we investigate the construction of two moduli stacks of Kummer
varieties. The first one is the stack of abstract
Kummer varieties and the second one is the stack of
embedded Kummer varieties. We will prove that is a
Deligne-Mumford stack and its coarse moduli space is isomorphic to , the coarse moduli space of principally polarized abelian varieties of
dimension . On the other hand we give a modular family
of embedded Kummer varieties embedded in , meaning that every geometric fiber of this family is an embedded
Kummer variety and every isomorphic class of such varieties appears at least
once as the class of a fiber. As a consequence, we construct the coarse moduli
space of embedded Kummer surfaces and
prove that it is obtained from by contracting a particular
curve inside this space. We conjecture that this is a general fact:
could be obtained from
via a contraction for all .Comment: 31 page
Accretion flows in early-type galaxies and CMB experiments
We investigate the possible contribution from the emission of accretion flows
around supermassive black holes in early type galaxies to current measurements
of the Cosmic Microwave Background (CMB) at radio frequencies. We consider a
range of luminosities suggested by targeted radio observations and accretion
models and compute the residual contribution of these sources to the spectrum
and bispectrum of the observed CMB maps. As for high-resolution CMB
experiments, we find that the unresolved component of these sources could make
up to ~40-50% of the observed CBI and BIMA power spectrum at l > 2000. As a
consequence, the inferred sigma_8^{SZ} value could be biased high by up to
6-7%. As for all sky experiments, we find that the contribution of
accretion-flow sources to the WMAP bispectrum is at the 2-3 per cent level at
most. At the flux limit that Planck will achieve, however, these sources may
contribute up to 15 per cent of the bispectrum in the 60-100 GHz frequency
range. Moreover, Planck should detect hundreds of these sources in the 30-300
GHz frequency window. These detections, possibly coupled with galaxy type
confirmation from optical surveys, will allow number counts to put tighter
constraints on early-type galaxies radio luminosity and accretion flows
properties. These sources may also contribute up to the 30 per cent level to
the residual radio sources power spectrum in future high-resolution SZ surveys
(like ACT or APEX) reaching mJy flux limits.Comment: 7 pages, 3 figures, accepted to MNRA
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