84 research outputs found

    Resource-Aware Junction Trees for Efficient Multi-Agent Coordination

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    In this paper we address efficient decentralised coordination of cooperative multi-agent systems by taking into account the actual computation and communication capabilities of the agents. We consider coordination problems that can be framed as Distributed Constraint Optimisation Problems, and as such, are suitable to be deployed on large scale multi-agent systems such as sensor networks or multiple unmanned aerial vehicles. Specifically, we focus on techniques that exploit structural independence among agents’ actions to provide optimal solutions to the coordination problem, and, in particular, we use the Generalized Distributive Law (GDL) algorithm. In this settings, we propose a novel resource aware heuristic to build junction trees and to schedule GDL computations across the agents. Our goal is to minimise the total running time of the coordination process, rather than the theoretical complexity of the computation, by explicitly considering the computation and communication capabilities of agents. We evaluate our proposed approach against DPOP, RDPI and a centralized solver on a number of benchmark coordination problems, and show that our approach is able to provide optimal solutions for DCOPs faster than previous approaches. Specifically, in the settings considered, when resources are scarce our approach is up to three times faster than DPOP (which proved to be the best among the competitors in our settings)

    Values in News and Political Manifestos: Annotation Guidelines

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    This guide provides an overview of the tasks of annotating news articles and political manifestos with i) one of 19 personal values and ii) the attainment level of the value in question. Values are important drivers of people’s beliefs, attitudes and behaviours and important for understanding citizens’ political nature. For the two annotation levels, the document provides extensive descriptions and examples of the taxonomy used. The guide is intended to be used by annotators and curators working on an annotation platform (Inception) for developing a corpus of annotated text that can later be used to train values detection algorithms. The guide has been used in the context of the project valuesML to annotate over 2500 documents in 9 different languages by around 70 values scholars.JRC.S.2 - Science for Democracy and Evidence-Informed Policymakin

    Study of Jet Quenching with Z plus jet Correlations in Pb-Pb and pp Collisions at root s(NN)=5.02 TeV

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    Search for Higgs boson pair production in the bb tau tau state in proton-proton collisions at root(s)=8 TeV

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    Search for massive resonances decaying into WW, WZ or ZZ bosons in proton-proton collisions at √s=13TeV

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    Searches for pair production of third-generation squarks in root s=13 TeV pp collisions

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    Search for Higgs boson pair production in the bbττ final state in proton-proton collisions at √(s) = 8 TeV

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    Relative Modification of Prompt ψ (2S) and J /ψ Yields from pp to PbPb Collisions at √S^{S}NN =5.02 TeV

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    Search for electroweak production of a vector-like quark decaying to a top quark and a Higgs boson using boosted topologies in fully hadronic final states

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    A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a standard model top or bottom quark, using 2.3 fb−1 of proton-proton collision data at √s =13 TeV collected by the CMS experiment at the CERN LHC. The search targets T quarks decaying to a top quark and a Higgs boson in fully hadronic final states. For a T quark with mass above 1 TeV the daughter top quark and Higgs boson are highly Lorentz-boosted and can each appear as a single hadronic jet. Jet substructure and b tagging techniques are used to identify the top quark and Higgs boson jets, and to suppress the standard model backgrounds. An excess of events is searched for in the T quark candidate mass distribution in the data, which is found to be consistent with the expected backgrounds. Upper limits at 95% confidence level are set on the product of the single T quark production cross sections and the branching fraction B(T→tH), and these vary between 0.31 and 0.93 pb for T quark masses in the range 1000-1800 GeV. This is the first search for single electroweak production of a vector-like T quark in fully hadronic final states

    Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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