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The complexity of social coordination [PDF]
Proceedings of the VLDB Endowment, 2012 Coordination is a challenging everyday task; just think of the last time you organized a party or a meeting involving several people. As a growing part of our social and professional life goes online, an opportunity for an improved coordination process arises. Recently, Gupta et al.
Konstantinos Mamouras +4 more
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Proceedings of the 2016 ACM Conference on Innovations in Theoretical Computer Science, 2016 We initiate the study of a quantity that we call coordination complexity. In a distributed optimization problem, the information defining a problem instance is distributed among $n$ parties, who need to each choose an action, which jointly will form a solution to the optimization problem.
Rachel Cummings +4 more
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On the complexity of parallel coordinate descent [PDF]
Optimization Methods and Software, 2017 In this work we study the parallel coordinate descent method (PCDM) proposed by Richtárik and Takáč [26] for minimizing a regularized convex function. We adopt elements from the work of Xiao and Lu [39], and combine them with several new insights, to obtain sharper iteration complexity results for PCDM than those presented in [26].
Rachael Tappenden +2 more
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Coordination Control of Complex Machines [PDF]
, 2014 Control and coordination are important aspects of the development of complex machines due to an ever-increasing demand for better functionality, quality, and performance. In WP6 of the C4C project, we developed a synthesis-centric systems engineering framework suitable for supervisory coordination of complex systems.
J.C.M. Baeten (Jos) +3 more
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Learning to coordinate in complex networks [PDF]
Adaptive Behavior, 2010 Designing an adaptive multi-agent system often requires the specification of interaction patterns between the different agents. To date, it remains unclear to what extent such interaction patterns influence the dynamics of the learning mechanisms inherent to each agent in the system.
Sven Van Segbroeck +4 more
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Causal complexity demands community coordination
Behavioral and Brain Sciences, 2021 Yarkoni’s argument risks skepticism about the very possibility of social science: If social phenomena are too causally complex, normal scientific methods could not possibly untangle them. We argue that the problem of causal complexity is best approached at the level of scientific communities and institutions, not the modeling practices of individual ...
Beau Sievers, Evan DeFilippis
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Mechanosynthesis of Sydnone-Containing Coordination Complexes [PDF]
Chemical Communications, 2019 N -Phenyl-4-(2-pyridinyl) sydnone was shown to act as a four-electron donor N , O -ligand in unprecedented coordination complexes featuring four different metallic centers (Co, Cu, Zn).
Nicolas Petry +6 more
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Homoleptic Pnictogen–Chalcogen Coordination Complexes [PDF]
Inorganic Chemistry, 2012 The synthesis and structural characterization of dicationic selenium and tellurium analogues of the carbodiphosphorane and triphosphenium families of compounds are reported. These complexes, [Ch(dppe)][OTf](2) [Ch = Se, Te; dppe = 1,2-bis(diphenylphosphino)ethane; OTf = trifluoromethanesulfonate], are formed using [Ch](2+) reagents via a ligand ...
Dube, Jonathan +4 more
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Inexact Coordinate Descent: Complexity and Preconditioning [PDF]
Journal of Optimization Theory and Applications, 2016 In this paper we consider the problem of minimizing a convex function using a randomized block coordinate descent method. One of the key steps at each iteration of the algorithm is determining the update to a block of variables. Existing algorithms assume that in order to compute the update, a particular subproblem is solved exactly.
Tappenden, Rachael +2 more
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Seventeen‐Coordinate Actinide Helium Complexes [PDF]
Angewandte Chemie, 2017 AbstractThe geometries and electronic structures of molecular ions featuring He atoms complexed to actinide cations are explored computationally using density functional and coupled cluster theories. A new record coordination number is established, as AcHe173+, ThHe174+, and PaHe174+are all found to be true geometric minima, with the He atoms clearly ...
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