4,632 research outputs found

    Quantum phases in entropic dynamics

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    In the Entropic Dynamics framework the dynamics is driven by maximizing entropy subject to appropriate constraints. In this work we bring Entropic Dynamics one step closer to full equivalence with quantum theory by identifying constraints that lead to wave functions that remain single-valued even for multi-valued phases by recognizing the intimate relation between quantum phases, gauge symmetry, and charge quantization.Comment: Presented at MaxEnt 2017, the 37th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering (July 9-14, 2017, Jarinu, Brazil

    Complete Genome Sequence of Staphylococcus epidermidis ATCC 12228 Chromosome and Plasmids Generated by Long-Read Sequencing

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    Staphylococcus epidermidis ATCC 12228 was sequenced using a long-read method to generate a complete genome sequence, including some plasmid sequences. Some differences from the previously generated short-read sequence of this nonpathogenic and non-biofilm-forming strain were noted. The assembly size was 2,570,371 bp with a total G+C% content of 32.08%

    Condorcet-Consistent and Approximately Strategyproof Tournament Rules

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    We consider the manipulability of tournament rules for round-robin tournaments of nn competitors. Specifically, nn competitors are competing for a prize, and a tournament rule rr maps the result of all (n2)\binom{n}{2} pairwise matches (called a tournament, TT) to a distribution over winners. Rule rr is Condorcet-consistent if whenever ii wins all n1n-1 of her matches, rr selects ii with probability 11. We consider strategic manipulation of tournaments where player jj might throw their match to player ii in order to increase the likelihood that one of them wins the tournament. Regardless of the reason why jj chooses to do this, the potential for manipulation exists as long as Pr[r(T)=i]\Pr[r(T) = i] increases by more than Pr[r(T)=j]\Pr[r(T) = j] decreases. Unfortunately, it is known that every Condorcet-consistent rule is manipulable (Altman and Kleinberg). In this work, we address the question of how manipulable Condorcet-consistent rules must necessarily be - by trying to minimize the difference between the increase in Pr[r(T)=i]\Pr[r(T) = i] and decrease in Pr[r(T)=j]\Pr[r(T) = j] for any potential manipulating pair. We show that every Condorcet-consistent rule is in fact 1/31/3-manipulable, and that selecting a winner according to a random single elimination bracket is not α\alpha-manipulable for any α>1/3\alpha > 1/3. We also show that many previously studied tournament formats are all 1/21/2-manipulable, and the popular class of Copeland rules (any rule that selects a player with the most wins) are all in fact 11-manipulable, the worst possible. Finally, we consider extensions to match-fixing among sets of more than two players.Comment: 20 page

    Approximately Strategyproof Tournament Rules: On Large Manipulating Sets and Cover-Consistence

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    We consider the manipulability of tournament rules, in which n teams play a round robin tournament and a winner is (possibly randomly) selected based on the outcome of all binom{n}{2} matches. Prior work defines a tournament rule to be k-SNM-? if no set of ? k teams can fix the ? binom{k}{2} matches among them to increase their probability of winning by >? and asks: for each k, what is the minimum ?(k) such that a Condorcet-consistent (i.e. always selects a Condorcet winner when one exists) k-SNM-?(k) tournament rule exists? A simple example witnesses that ?(k) ? (k-1)/(2k-1) for all k, and [Jon Schneider et al., 2017] conjectures that this is tight (and prove it is tight for k=2). Our first result refutes this conjecture: there exists a sufficiently large k such that no Condorcet-consistent tournament rule is k-SNM-1/2. Our second result leverages similar machinery to design a new tournament rule which is k-SNM-2/3 for all k (and this is the first tournament rule which is k-SNM-(<1) for all k). Our final result extends prior work, which proves that single-elimination bracket with random seeding is 2-SNM-1/3 [Jon Schneider et al., 2017], in a different direction by seeking a stronger notion of fairness than Condorcet-consistence. We design a new tournament rule, which we call Randomized-King-of-the-Hill, which is 2-SNM-1/3 and cover-consistent (the winner is an uncovered team with probability 1)

    Institutional and policy analysis of river basin management: the Fraser River Basin, Canada

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    The authors describe and analyze a nongovernmental, multi-stakeholder, consensus-based approach to river basin management in the Fraser River basin in Canada. The Fraser River drains 238,000 km2 of British Columbia, supporting nearly 3 million residents and a diverse economy. Water management issues include water quality and allocation, flood protection, and emerging scarcity concerns in portions of the basin. The Fraser Basin Council (FBC) is a locally-initiated nongovernmental organization (NGO) with representation from public and private stakeholders. Since evolving in the 1990s from earlier programs and projects in the basin, FBC has pursued several objectives related to a broad concept of basin"sustainability"incorporating social, economic, and environmental aspects. The NGO approach has allowed FBC to match the boundaries of the entire basin, avoid some intergovernmental turf battles, and involve First Nations communities and private stakeholders in ways governmental approaches sometimes find difficult. While its NGO status means that FBC cannot implement many of the plans it agrees on and must constantly work to maintain diverse yet stable funding, FBC holds substantial esteem among basin stakeholders for its reputation for objectivity, its utility as an information sharing forum, and its success in fostering an awareness of interdependency within the basin.Agricultural Knowledge&Information Systems,Water Conservation,Environmental Economics&Policies,Water and Industry,Sanitation and Sewerage,Water Supply and Sanitation Governance and Institutions,Drought Management,Town Water Supply and Sanitation,Water and Industry,Water Conservation

    Genome Sequences for Three Strains of Kocuria rosea, Including the Type Strain

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    Genomes from three strains of Kocuria rosea were sequenced. K. rosea ATCC 186, the type strain, was 3,958,612 bp in length with a total G+C content of 72.70%. When assembled, K. rosea ATCC 516 was 3,862,128 bp with a 72.82% G+C content. K. rosea ATCC 49321 was 4,018,783 bp in size with a 72.49% G+C content
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