560 research outputs found
The Foreign Policy of Cities
Over the last decade, cities have gained increasing prominence on the world stage. Simon Curtis and Michele Acuto show how and why cities are increasingly flexing their economic and political muscles, and discuss some of the constraints cities face in developing their own foreign policies, as well as the differences between city-based diplomatic activity and traditional state foreign policy. Finally, they discuss the significance of city diplomacy trends for thinking about the international system
An almost elementary Higgs: theory and practice
We study models that interpolate between an elementary and a composite Higgs boson. Such models, arising in theories with new vector-like fermions with electro-weak quantum numbers and charged under a confining gauge interaction, are entirely compatible with current data, with only weak bounds from flavor, CP-violation and precision tests. After classifying the models from the point of view of symmetries, we study their collider phenomenology at LHC. In the most relevant scenarios, bounds from present searches exclude heavy scalar isospin triplets and quintuplets up to 3c200GeV and we show how dedicated searches of simple signals such as pp\u21923\u3b3W could improve the reach by at least a factor of 2 with present data, reaching O(1TeV) with higher integrated luminosities. States that mix with the SM Higgs can be tested in a variety of final states, such as 2b2\u3b3 searches relevant for double Higgs production
LHC13: The Showdown of Particle Physics
Con il recente riavvio dell’esperimento al Large Hadron Collider (LHC) del CERN ha inizio una nuova fase per la fisica delle particelle. Dopo due lunghi anni di silenzio la comunità dei fisici delle particelle è in trepidante attesa per i risultati di questo nuova fase di LHC (run II) con 13 TeV di energia nel centro di massa, che saranno cruciali per il futuro del settore. Grandi aspettative e grandi sfide ci aspettano.With the recent restart of the LHC experiment at CERN a new phase for particle physics has begun. After two long years of silence, the particle physics community is eagerly awaiting the results from run II of the LHC at 13 TeV center of mass energy, which will be crucial for the future of the field. Great expectations and challenges are before us
Achieving Behavioral Health Care Integration in Rural America
Integrating primary care services and treatment for mental health and substance use conditions not only enhances patients' access to needed care but also improves health outcomes in a cost-effective way. Yet the barriers to integrated care are substantial, and it is even more difficult to achieve in rural and frontier communities, which are home to 1 in 7 Americans.Our current work focuses on breaking down the barriers to integration in rural America, where the health care infrastructure and provider composition vary in distinct ways from urban and suburban areas. Americans in rural areas face significant shortages of psychiatrists, psychologists, clinical social workers, and other behavioral health specialists. More than 60% of nonmetropolitan counties lack a psychiatrist, and almost half of nonmetropolitan counties do not have a psychologist, compared with 27% and 19% of urban counties, respectively. These gaps in specialty care force rural residents to rely heavily on primary providers for much of their care
Generalized Species Sampling Priors with Latent Beta reinforcements
Many popular Bayesian nonparametric priors can be characterized in terms of
exchangeable species sampling sequences. However, in some applications,
exchangeability may not be appropriate. We introduce a {novel and
probabilistically coherent family of non-exchangeable species sampling
sequences characterized by a tractable predictive probability function with
weights driven by a sequence of independent Beta random variables. We compare
their theoretical clustering properties with those of the Dirichlet Process and
the two parameters Poisson-Dirichlet process. The proposed construction
provides a complete characterization of the joint process, differently from
existing work. We then propose the use of such process as prior distribution in
a hierarchical Bayes modeling framework, and we describe a Markov Chain Monte
Carlo sampler for posterior inference. We evaluate the performance of the prior
and the robustness of the resulting inference in a simulation study, providing
a comparison with popular Dirichlet Processes mixtures and Hidden Markov
Models. Finally, we develop an application to the detection of chromosomal
aberrations in breast cancer by leveraging array CGH data.Comment: For correspondence purposes, Edoardo M. Airoldi's email is
[email protected]; Federico Bassetti's email is
[email protected]; Michele Guindani's email is
[email protected] ; Fabrizo Leisen's email is
[email protected]. To appear in the Journal of the American
Statistical Associatio
IRAC and MIPS Observations of the Interacting Galaxies IC 2163 and NGC 2207: Clumpy Emission
IC 2163 and NGC 2207 are interacting galaxies that have been well studied at
optical and radio wavelengths and simulated in numerical models to reproduce
the observed kinematics and morphological features. Spitzer IRAC and MIPS
observations reported here show over 200 bright clumps from young star
complexes. The brightest IR clump is a morphologically peculiar region of star
formation in the western arm of NGC 2207. This clump, which dominates the
Halpha and radio continuum emission from both galaxies, accounts for ~12% of
the total 24mu m flux. Nearly half of the clumps are regularly spaced along
some filamentary structure, whether in the starburst oval of IC 2163 or in the
thin spiral arms of NGC 2207. This regularity appears to influence the clump
luminosity function, making it peaked at a value nearly a factor of 10 above
the completeness limit, particularly in the starburst oval. This is unlike the
optical clusters inside the clumps, which have a luminosity function consistent
with the usual power law form. The giant IR clumps presumably formed by
gravitational instabilities in the compressed gas of the oval and the spiral
arms, whereas the individual clusters formed by more chaotic processes, such as
turbulence compression, inside these larger-scale structures.Comment: 49 pages, 18 figures, ApJ, 642, 15
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