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83 research outcomes, page 1 of 9
  • Drosophila melanogaster recently spread from its tropical origin in Africa and became a cosmopolitan species that has adapted to a wide range of different thermal environments, including temperate climates. An important limiting factor of temperate climates has probably...

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  • publication . Preprint . Article . 2013
    Open Access
    Authors:
    Joris Bierkens; Vladimir Y. Chernyak; Michael Chertkov; Hilbert J. Kappen;
    Persistent Identifiers
    Publisher: IOP Publishing
    Country: Netherlands
    Project: NSF | Excited State Electronic ... (1111350), EC | FILOSE (231495)

    Long term average or 'ergodic' optimal control problems on a compact manifold are considered. The problems exhibit a special structure which is typical of control problems related to large deviations theory: Control is exerted in all directions and the control costs are...

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  • publication . Article . 2017
    Open Access
    Authors:
    Hyukjun Gweon; Matthias Schonlau; Lars Kaczmirek; Michael Blohm; Stefan H. Steiner;
    Persistent Identifiers
    Publisher: Walter de Gruyter GmbH

    Abstract Occupation coding, an important task in official statistics, refers to coding a respondent’s text answer into one of many hundreds of occupation codes. To date, occupation coding is still at least partially conducted manually, at great expense. We propose thre...

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  • publication . Conference object . Preprint . 2016
    Open Access
    Authors:
    Ahmed Abdelwahab; Reinhold Kliegl; Niels Landwehr;
    Persistent Identifiers
    Publisher: Association for Computational Linguistics

    We study the problem of identifying individuals based on their characteristic gaze patterns during reading of arbitrary text. The motivation for this problem is an unobtrusive biometric setting in which a user is observed during access to a document, but no specific cha...

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  • publication . Article . 2021
    Open Access English
    Authors:
    Humberto Rafeiro; Stefan Samko;
    Persistent Identifiers
    Publisher: SPRINGER
    Country: Portugal

    We introduce generalized local and global Herz spaces where all their characteristics are variable. As one of the main results we show that variable Morrey type spaces and complementary variable Morrey type spaces are included into the scale of these generalized variabl...

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  • publication . Article . 2021
    Open Access
    Authors:
    Alvaro Fuentes; Oliver Lüdtke; Alexander Robitzsch;
    Persistent Identifiers
    Publisher: Informa UK Limited

    Propensity score methods are a widely recommended approach to adjust for confounding and to recover treatment effects with non-experimental, single-level data. This article reviews propensity score weighting estimators for multilevel data in which individuals (level 1) ...

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  • publication . Article . 2017
    Open Access English
    Authors:
    Nelson Antunes; Vladas Pipiras; Patrice Abry; Darryl Veitch;
    Publisher: HAL CCSD
    Countries: Portugal, France, Australia, France

    Poisson cluster processes are special point processes that find use in modeling Internet traffic, neural spike trains, computer failure times and other real-life phenomena. The focus of this work is on the various moments and cumulants of Poisson cluster processes, and ...

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  • publication . Article . 2019
    Open Access
    Authors:
    Ruben L. Bach; Stephanie Eckman; Jessica Daikeler;
    Persistent Identifiers
    Publisher: GBR

    AbstractMany surveys aim to achieve high response rates to keep bias due to nonresponse low. However, research has shown that the relationship between the nonresponse rate and nonresponse bias is small. In fact, high response rates may lead to measurement error, if resp...

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  • publication . Conference object . Part of book or chapter of book . 2017
    Open Access English
    Authors:
    Jonatan Olofsson; Edmund Brekke; Tor Arne Johansen;
    Persistent Identifiers
    Publisher: IEEE
    Country: Norway
    Project: EC | MarineUAS (642153)

    In polar region operations, drift ice positioning and tracking is useful for both scientific and safety reasons. Many sensors can be employed to generate detections of sea ice, such as satellite-carried Synthetic Aperture Radar (SAR) and, recently, imagery equipment car...

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  • publication . Article . 2020
    Open Access
    Authors:
    Paolo Maranzano; Alessandro Fasso; Matteo Pelagatti; And Manfred Mudelsee;
    Persistent Identifiers
    Publisher: MDPI AG
    Countries: Italy, Italy, Germany

    Most urban areas of the Po basin in the North of Italy are persistently affected by poor air quality and difficulty in disposing of airborne pollutants. In this context, the municipality of Milan started a multi-year progressive policy based on an extended limited traff...

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83 research outcomes, page 1 of 9