859 research outputs found
Are creative cities good places for creative people? notes on the social conditions for cultural production in contemporary economy
Purpose: This paper discusses the social conditions for cultural production in contemporary cities, in the context of a globalized economy, with rising importance of the integration of cognitive, symbolic and emotional elements into tradable products and services. Although the agglomeration dynamics of creative activities in urban contexts and the social or spatial inequalities related to processes of urban reorganization in Post-Fordist societies have been analysed in the last years, the interrelations between these aspects still lack adequate investigation and empirical analysis. Methodology/Approach: By synthetizing diverse theoretical contributions related to different levels and interactions arising from creative activities, their transformations into tradable products (commodification) and some of their spatial implications in the urban context (agglomeration, externalities, identity, place branding and gentrification), the article emphasizes the different benefits obtained by the agents involved in this process, potentially contributing for increasing social conflicts and to a process of cultural homogenization with negative implications on the uniqueness and authenticity of places. Findings: Benefits arising from the externalities generated by the agglomeration of cultural production and creative activities can be framed within the "Common Pool of Resources" approach, suggesting that a more balanced share of the benefits can be obtained by means of participatory processes for city planning and development. Research Limitation/implication:The paper is based on a conceptual approach and further empirical research can be useful in order to test the formulations proposed. Originality/Value of paper: This analysis leads to the identification of different questions for further research, by combining quantitative analysis for the measurement of cultural and creative externalities and modelling processes for the distribution of benefits arising from cultural production, with qualitative analysis related to participatory processes of urban planning and monitoring
Cultural heritage appraisal by visitors to global cities: the use of social media and urban analytics in urban buzz research
An attractive cultural heritage is an important magnet for visitors to many cities nowadays. The present paper aims to trace the constituents of the destination attractiveness of 40 global cities from the perspective of historical-cultural amenities, based on a merger of extensive systematic databases on these cities. The concept of cultural heritage buzz is introduced to highlight: (i) the importance of a varied collection of urban cultural amenities; (ii) the influence of urban cultural magnetism on foreign visitors, residents and artists; and (iii) the appreciation for a large set of local historical-cultural amenities by travelers collected from a systematic big data set (emerging from the global TripAdvisor platform). A multivariate and econometric analysis is undertaken to validate and test the quantitative picture of the above conceptual framework, with a view to assess the significance of historical-cultural assets and socio-cultural diversity in large urban agglomerations in the world as attraction factors for visitors. The results confirm our proposition on the significance of urban cultural heritage as a gravity factor for destination choices in international tourism in relation to a high appreciation for historical-cultural amenities.info:eu-repo/semantics/publishedVersio
SINGLE PHOTON DECAYS OF THE AND SUSY WITH SPONTANEOUSLY BROKEN R-PARITY
Spontaneous violation of R parity can induce rare single photon decays of the
involving the emission of (nearly) massless pseudoscalar Goldstone
bosons, majorons, as well as massive CP even or CP odd spin zero bosons that
arise in the electroweak breaking sector of these models. We show that the
majoron emitting decays can have a sizeable branching ratio of or so,
without conflicting any experimental observation from neutrino physics or
particle searches. These decays may lead to interesting structures for the
single photon spectrum involving either mono chromatic photons as well as
continuous spectra that grow with energy. They would easily account for an
excess of single photon events at high energies recently hinted at by the OPAL
collaboration.Comment: 13 pages, latex file, figures not included but available by fax upon
reques
in the complex two Higgs doublet model
The latest LHC data confirmed the existence of a Higgs-like particle and made
interesting measurements on its decays into , , , , and . It is expected that a decay into might be measured at the next LHC round, for which there already exists
an upper bound. The Higgs-like particle could be a mixture of scalar with a
relatively large component of pseudoscalar. We compute the decay of such a
mixed state into , and we study its properties in the context of the
complex two Higgs doublet model, analysing the effect of the current
measurements on the four versions of this model. We show that a measurement of
the rate at a level consistent with the SM can be used
to place interesting constraints on the pseudoscalar component. We also comment
on the issue of a wrong sign Yukawa coupling for the bottom in Type II models.Comment: 31 pages, 15 figure
A reappraisal of the wrong-sign coupling and the study of
It has been pointed out recently that current experiments still allow for a
two Higgs doublet model where the coupling () is
negative; a sign opposite to that of the Standard Model. Due to the importance
of delayed decoupling in the coupling, improved measurements will have a strong impact on this issue. For the
same reason, measurements or even bounds on are
potentially interesting. In this article, we revisit this problem, highlighting
the crucial importance of , which can be understood with
simple arguments. We show that the impacts on models of both and are very sensitive to
input values for the gluon fusion production mechanism; in contrast, and are not. We also
inquire if the search for and its interplay with will impact the sign of the coupling.
Finally, we study these issues in the context of the Flipped two Higgs doublet
model.Comment: 13 pages, pdf figure
Novel Supersymmetric SO(10) Seesaw Mechanism
We propose a new seesaw mechanism for neutrino masses within a class of
supersymmetric SO(10) models with broken D-parity. It is shown that in such
scenarios the B-L scale can be as low as TeV without generating inconsistencies
with gauge coupling unification nor with the required magnitude of the light
neutrino masses. This leads to a possibly light new neutral gauge boson as well
as relatively light quasi-Dirac heavy leptons. These particles could be at the
TeV scale and mediate lepton flavour and CP violating processes at appreciable
levels.Comment: 4 pages, 3 figures, revtex4, references added, typos corrected,
sharper discussion of the RGEs give
On the constraints defining BPS monopoles
We discuss the explicit formulation of the transcendental constraints
defining spectral curves of SU(2) BPS monopoles in the twistor approach of
Hitchin, following Ercolani and Sinha. We obtain an improved version of the
Ercolani-Sinha constraints, and show that the Corrigan-Goddard conditions for
constructing monopoles of arbitrary charge can be regarded as a special case of
these. As an application, we study the spectral curve of the tetrahedrally
symmetric 3-monopole, an example where the Corrigan-Goddard conditions need to
be modified. A particular 1-cycle on the spectral curve plays an important role
in our analysis.Comment: 29 pages, 7 eps figure
Spontaneous CP Violation in the Next-to-Minimal Supersymmetric Standard Model Revisited
We re-examine spontaneous CP violation at the tree level in the context of
the next-to-minimal supersymmetric standard model (NMSSM) with two Higgs
doublets and a gauge singlet field. We analyse the most general Higgs potential
without a discrete Z_3 symmetry, and derive an upper bound on the mass of the
lightest neutral Higgs boson consistent with present experimental data. We
investigate, in particular, its dependence on the admixture and CP-violating
phase of the gauge singlet field, as well as on tan(beta). To assess the
viability of the spontaneous CP violation scenario, we estimate epsilon_K by
applying the mass insertion approximation. We find that a non-trivial flavour
structure in the soft-breaking A terms is required to account for the observed
CP violation in the neutral kaon sector. Furthermore, combining the
minimisation conditions for spontaneous CP violation with the constraints
coming from K0-K0bar mixing, we find that the upper bound on the lightest
Higgs-boson mass becomes stronger. We also point out that the electric dipole
moments of electron and neutron are a serious challenge for SUSY models with
spontaneous CP violation.Comment: 19 pages, LaTeX2e, 5 figures; matches the published versio
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