3,543 research outputs found

    Holomorphic families of non-equivalent embeddings and of holomorphic group actions on affine space

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    We construct holomorphic families of proper holomorphic embeddings of \C^k into \C^n (0<k<n−10<k<n-1), so that for any two different parameters in the family no holomorphic automorphism of \C^n can map the image of the corresponding two embeddings onto each other. As an application to the study of the group of holomorphic automorphisms of \C^n we derive the existence of families of holomorphic \C^*-actions on \C^n (n≥5n\ge 5) so that different actions in the family are not conjugate. This result is surprising in view of the long standing Holomorphic Linearization Problem, which in particular asked whether there would be more than one conjugacy class of \C^* actions on \C^n (with prescribed linear part at a fixed point)

    Underlying event sensitive observables in Drell-Yan production using GENEVA

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    We present an extension of the GENEVA Monte Carlo framework to include multiple parton interactions (MPI) provided by PYTHIA8. This allows us to obtain predictions for underlying-event sensitive measurements in Drell-Yan production, in conjunction with GENEVA's fully-differential NNLO calculation, NNLL' resummation for the 0-jet resolution variable (beam thrust), and NLL resummation for the 1-jet resolution variable. We describe the interface with the parton shower algorithm and MPI model of PYTHIA8, which preserves both the precision of partonic N-jet cross sections in GENEVA as well as the shower accuracy and good description of soft hadronic physics of PYTHIA8. We present results for several underlying-event sensitive observables and compare to data from ATLAS and CMS as well as to standalone PYTHIA8 predictions. This includes a comparison with the recent ATLAS measurement of the beam thrust spectrum, which provides a potential avenue to fully disentangle the physical effects from the primary hard interaction, primary soft radiation, multiple parton interactions, and nonperturbative hadronization.Comment: 23 pages, 11 figures. v3: version accepted by EPJ

    Where do Flies go in the Winter Time?

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    https://digitalcommons.library.umaine.edu/mmb-vp/4100/thumbnail.jp

    Impact of a Brief Workshop on Stages of Change Profiles in Athletes

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    This report examines the impact of a psychoeducational workshop on athletes’ stages of change for use of mental skills training. Fourteen teams participated in a sport psychology workshop including seven women’s teams (n = 124) and seven men’s teams (n = 96). Teams were assessed on decisional balance (pros and cons) and stages of change variables before and after the workshop. As hypothesized, athletes reported significantly higher pros and contemplation scores after the workshop, with corresponding decreases in cons and precontemplation scores. Moderate effect sizes (.35 - .68) supported a positive impact of the workshop on athletes’ perceptions of mental training, but data were not collected on how long these effects may last. The results also suggest that research should explore more efficient methods for stage assignment for athletes to maximize intervention effectiveness

    The Configurable SAT Solver Challenge (CSSC)

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    It is well known that different solution strategies work well for different types of instances of hard combinatorial problems. As a consequence, most solvers for the propositional satisfiability problem (SAT) expose parameters that allow them to be customized to a particular family of instances. In the international SAT competition series, these parameters are ignored: solvers are run using a single default parameter setting (supplied by the authors) for all benchmark instances in a given track. While this competition format rewards solvers with robust default settings, it does not reflect the situation faced by a practitioner who only cares about performance on one particular application and can invest some time into tuning solver parameters for this application. The new Configurable SAT Solver Competition (CSSC) compares solvers in this latter setting, scoring each solver by the performance it achieved after a fully automated configuration step. This article describes the CSSC in more detail, and reports the results obtained in its two instantiations so far, CSSC 2013 and 2014

    Phonology and intonation

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    The encoding standards for phonology and intonation are designed to facilitate consistent annotation of the phonological and intonational aspects of information structure, in languages across a range ofprosodic types. The guidelines are designed with the aim that a nonspecialist in phonology can both implement and interpret the resulting annotation

    A mathematical framework for combining decisions of multiple experts toward accurate and remote diagnosis of malaria using tele-microscopy.

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    We propose a methodology for digitally fusing diagnostic decisions made by multiple medical experts in order to improve accuracy of diagnosis. Toward this goal, we report an experimental study involving nine experts, where each one was given more than 8,000 digital microscopic images of individual human red blood cells and asked to identify malaria infected cells. The results of this experiment reveal that even highly trained medical experts are not always self-consistent in their diagnostic decisions and that there exists a fair level of disagreement among experts, even for binary decisions (i.e., infected vs. uninfected). To tackle this general medical diagnosis problem, we propose a probabilistic algorithm to fuse the decisions made by trained medical experts to robustly achieve higher levels of accuracy when compared to individual experts making such decisions. By modelling the decisions of experts as a three component mixture model and solving for the underlying parameters using the Expectation Maximisation algorithm, we demonstrate the efficacy of our approach which significantly improves the overall diagnostic accuracy of malaria infected cells. Additionally, we present a mathematical framework for performing 'slide-level' diagnosis by using individual 'cell-level' diagnosis data, shedding more light on the statistical rules that should govern the routine practice in examination of e.g., thin blood smear samples. This framework could be generalized for various other tele-pathology needs, and can be used by trained experts within an efficient tele-medicine platform

    Letter from Edward Lea, Randolph Mott, and Sam Frank to Thomas W. Harris. 26 June 1868

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    Letter sent from Holly Springs, Mississippi; regarding thanks of Lodge No. 35 for Harris\u27s speech.https://egrove.olemiss.edu/ciwar_corresp/1339/thumbnail.jp
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