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作者：Fan, Minjie; Paul, Debashis; Lee, Thomas C. M.; Matsuo, Tomoko
作者单位：University of California System; University of California Davis; University of Colorado System; University of Colorado Boulder
摘要：Gaussian random fields have been one of the most popular tools for analyzing spatial data. However, many geophysical and environmental processes often display non-Gaussian characteristics. In this paper, we propose a new class of spatial models for non-Gaussian random fields on a sphere based on a multi-resolution analysis. Using a special wavelet frame, named spherical needlets, as building blocks, the proposed model is constructed in the form of a sparse random effects model. The spatial loc...
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作者：Dean, Natalie E.; Halloran, M. Elizabeth; Longini, Ira M.
作者单位：State University System of Florida; University of Florida; Fred Hutchinson Cancer Center; University of Washington; University of Washington Seattle
摘要：Conducting vaccine efficacy trials during outbreaks of emerging pathogens poses particular challenges. The Ebola ca suffit trial in Guinea used a novel ring vaccination cluster randomized design to target populations at highest risk of infection. Another key feature of the trial was the use of a delayed vaccination arm as a comparator, in which clusters were randomized to immediate vaccination or vaccination 21 days later. This approach, chosen to improve ethical acceptability of the trial, co...
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作者：Shin, Yei Eun; Ding, Yu; Huang, Jianhua Z.
作者单位：Texas A&M University System; Texas A&M University College Station; Texas A&M University System; Texas A&M University College Station; Texas A&M University System; Texas A&M University College Station; National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI); NIH National Cancer Institute- Division of Cancer Epidemiology & Genetics
摘要：In the wind industry, engineers perform retrofitting upgrades on inservice wind turbines for the purpose of improving power production capabilities. Considering how costly an upgrade can be, people often wonder about the upgrade effect: whether it indeed improves turbine performances, and if so, how much. One cannot simply compare power outputs for the purpose of assessing a turbine's improvement, as wind power generation is affected by an array of environmental covariates, including wind spee...
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作者：Donnat, Claire; Holmes, Susan
作者单位：Stanford University
摘要：From longitudinal biomedical studies to social networks, graphs have emerged as essential objects for describing evolving interactions between agents in complex systems. In such studies, after pre-processing, the data are encoded by a set of graphs, each representing a system's state at a different point in time or space. The analysis of the system's dynamics depends on the selection of the appropriate analytical tools. In particular, after specifying properties characterizing similarities bet...
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作者：Snoke, Joshua; Brick, Timothy R.; Slavkovic, Aleksandra; Hunter, Michael D.
作者单位：Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; University of Oklahoma System; University of Oklahoma Health Sciences Center
摘要：This paper focuses on the privacy paradigm of providing access to researchers to remotely carry out analyses on sensitive data stored behind separate firewalls. We address the situation where the analysis demands data from multiple physically separate databases which cannot be combined. Motivating this work is a real model based on research data on kinship foster placement that came from multiple sources and could only be combined through a lengthy process with a trusted research network. We d...
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作者：Heggeseth, Brianna C.; Jewell, Nicholas P.
作者单位：Williams College; University of California System; University of California Berkeley; University of California System; University of California Berkeley
摘要：Longitudinal studies play a prominent role in biological, social, and behavioral sciences. Repeated measurements over time facilitate the study of an outcome level, how individuals change over time, and the factors that may impact either or both. A standard approach to modeling childhood growth over time is to use multilevel or mixed effects models to study factors that might play a role in the level and growth over time. However, there has been increased interest in using mixture models, whic...
