710 research outputs found
Generalized Galilean Algebras and Newtonian Gravity
The non-relativistic versions of the generalized Poincar\'{e} algebras and
generalized -Lorentz algebras are obtained. This non-relativistic algebras
are called, generalized Galilean algebras type I and type II and denoted by
and
respectively. Using a generalized In\"{o}n\"{u}--Wigner contraction procedure
we find that the generalized Galilean algebras type I can be obtained from the
generalized Galilean algebras type II. The -expansion procedure allows us to
find the algebra from the Newton--Hooke
algebra with central extension. The procedure developed in Ref. \cite{newton}
allow us to show that the non-relativistic limit of the five dimensional
Einstein--Chern--Simons gravity is given by a modified version of the Poisson
equation. The modification could be compatible with the effects of Dark Matter,
which leads us to think that Dark Matter can be interpreted as a
non-relativistic limit of Dark Energy.Comment: 16 pages, no figures in 755 (2016) 433-43
Probing neutralino dark matter in the MSSM & the NMSSM with directional detection
We investigate the capability of directional detectors to probe neutralino
dark matter in the Minimal Supersymmetric Standard Model and the
Next-to-Minimal Supersymmetric Standard Model with parameters defined at the
weak scale. We show that directional detectors such as the future MIMAC
detector will probe spin dependent dark matter scattering on nucleons that are
beyond the reach of current spin independent detectors. The complementarity
between indirect searches, in particular using gamma rays from dwarf spheroidal
galaxies, spin dependent and spin independent direct search techniques is
emphasized. We comment on the impact of the negative results on squark searches
at the LHC. Finally, we investigate how the fundamental parameters of the
models can be constrained in the event of a dark matter signal.Comment: 21 pages, 16 figure
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Foreign in influence and domestic policy: A survey
In an interconnected world, economic and political interests inevitably reach beyond national borders. Since policy choices generate external economic and political costs, foreign state and non-state actors have an interest in influencing policy actions in other sovereign countries to their advantage. Foreign influence is a strategic choice aimed at internalizing these externalities and takes many forms. We distinguish three broad types of intervention strategies, (i) voluntary agreement interventions between the intervening foreign power and the target country, (ii) policy interventions based on rewarding or sanctioning the target country to obtain a specific change in policy and (iii) institution interventions aimed at influencing the policy choice by changing the political institutions in the target country (with or without a civil war). We propose a unifying theoretical framework to understand when and which form of foreign influence is chosen and use it to organize and evaluate the new political economics literature on foreign influence along with work in cognate disciplines. Foreign intervention plays a more important role for a proper understanding of domestic policy choices, for institutional dynamics and for internal conflict than is commonly acknowledged in both empirical and theoretical research
Multi-stakeholder contribution to the identification of a core outcome set and measurements in implant dentistry (ID-COSM initiative) using the Delphi methodology
AIM: To obtain input from multiple stakeholders and generate agreement on essential outcomes in implant dentistry using the Delphi methodology and incorporate them into an international consensus defining a core outcome set. MATERIALS AND METHODS: Candidate outcomes in implant dentistry were generated from scientific evidence through five commissioned systematic reviews and from people with lived experience in dental implants (PWLE) through four international focus groups. A steering committee identified stakeholders among representatives from dental professionals, industry-related experts and PWLE. Participants underwent a three-round Delphi survey using a multi-stakeholder approach; they assessed candidate outcomes and additional outcomes identified in the first Delphi round. The process followed the COMET methodology. RESULTS: From the 665 potential outcomes identified in the systematic reviews and 89 in the PWLE focus group, the steering committee selected 100 and organized them into 13 categories, to be included in the first-round questionnaire as candidate outcomes. A total of 99 dental experts, 7 dental-industry-related experts and 17 PWLE participated in the first round, and 11 additional outcomes were added to the second round. There was no attrition between the first and second rounds, where 61 (54.9%) outcomes exceeded the pre-established threshold of agreement. PWLE and experts participated in the third round that applied "a priori" standard filters to distil a list of candidate essential outcomes. CONCLUSION: This Delphi study utilized a standardized, transparent and inclusive methodology and preliminarily validated 13 essential outcomes organized into four core areas. These results informed the final stage of the ID-COSM consensus
Feature extraction based on bio-inspired model for robust emotion recognition
Emotional state identification is an important issue to achieve more natural speech interactive systems. Ideally, these systems should also be able to work in real environments in which generally exist some kind of noise. Several bio-inspired representations have been applied to artificial systems for speech processing under noise conditions. In this work, an auditory signal representation is used to obtain a novel bio-inspired set of features for emotional speech signals. These characteristics, together with other spectral and prosodic features, are used for emotion recognition under noise conditions. Neural models were trained as classifiers and results were compared to the well-known mel-frequency cepstral coefficients. Results show that using the proposed representations, it is possible to significantly improve the robustness of an emotion recognition system. The results were also validated in a speaker independent scheme and with two emotional speech corpora.Fil: Albornoz, Enrique Marcelo. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Centro CientÃfico Tecnológico Conicet - Santa Fe. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional. Universidad Nacional del Litoral. Facultad de IngenierÃa y Ciencias HÃdricas. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional; ArgentinaFil: Milone, Diego Humberto. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Centro CientÃfico Tecnológico Conicet - Santa Fe. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional. Universidad Nacional del Litoral. Facultad de IngenierÃa y Ciencias HÃdricas. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional; ArgentinaFil: Rufiner, Hugo Leonardo. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Centro CientÃfico Tecnológico Conicet - Santa Fe. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional. Universidad Nacional del Litoral. Facultad de IngenierÃa y Ciencias HÃdricas. Instituto de Investigación en Señales, Sistemas e Inteligencia Computacional; Argentin
Ampliación de la distribución geográfica de Microgenys minuta Eigenmann 1913 (Characiformes, Characidae) en la cuenca del rÃo Magdalena, Colombia
Se amplÃa la distribución de Microgenys minuta (Characiformes, Characidae) desde la sección medio-alta del
rÃo Cauca y el tramo alto del rÃo Magdalena hasta la porción media de la cuenca del rÃo Magdalena, con base
en ejemplares colectados en el piedemonte del departamento de Santander, Colombia
Ampliación de la distribución geográfica de Microgenys minuta Eigenmann 1913 (Characiformes, Characidae) en la cuenca del rÃo Magdalena, Colombia
The distribution of Microgenys minuta (Characiformes, Characidae) is expanded to include the area from the mid-upper section of the Cauca River and the high stretch of the Magdalena River to the middle portion of the Magdalena River Basin, based on specimens collected in piedmont streams of Santander Department, Colombia.Se amplÃa la distribución de Microgenys minuta (Characiformes, Characidae) desde la sección medio-alta delrÃo Cauca y el tramo alto del rÃo Magdalena hasta la porción media de la cuenca del rÃo Magdalena, con baseen ejemplares colectados en el piedemonte del departamento de Santander, Colombia
To cut or not to cut: Deforestation policy under the shadow of foreign influence
This article explores the complex interplay between deforestation policies and foreign influence, using a game theoretical model to analyze geopolitical factors influencing forest conservation decisions in countries with significant rainforests. The model highlights the conflicting interests of foreign powers – one aiming for economic benefits from agriculture and the other advocating for forest preservation to protect environmental services. The paper demonstrates how domestic political dynamics and economic shocks from the international economic influence regulatory decisions on deforestation in the shadow of foreign influence. This understanding is crucial for formulating strategies that balance developmental needs and global environmental concerns
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