Browsing by Keyword "time series"
Now showing items 1-11 of 11
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The Concentration-Response Relation Between PM\(_{2.5}\) and Daily Deaths.
(National Institute of Environmental Health Sciences, 2002)Particulate air pollution at commonly occurring concentrations is associated with daily deaths. Recent attention has focused on the shape of the concentration-response curve, particularly at low doses. Several recent ... -
Discovering Shared Cardiovascular Dynamics within a Patient Cohort
(Institute of Electrical and Electronics Engineers, 2012)Cardiovascular variables such as heart rate (HR) and blood pressure (BP) are robustly regulated by an underlying control system. Time series of HR and BP exhibit distinct dynamical patterns of interaction in response to ... -
Dynamic Factor Models
(Oxford University Press, 2011)This article surveys work on a class of models, dynamic factor models (DFMs), that has received considerable attention in the past decade because of their ability to model simultaneously and consistently data sets in which ... -
The effect of weather on respiratory and cardiovascular deaths in 12 U.S. cities.
(National Institute of Environmental Health Sciences, 2002)We carried out time-series analyses in 12 U.S. cities to estimate both the acute effects and the lagged influence of weather on respiratory and cardiovascular disease (CVD) deaths. We fit generalized additive Poisson ... -
Fidelity, Fairness and Responsibility through the Lens of Sequential Decision Making
(2024-01-19)As methods of artificial intelligence continue to become increasingly important to support robust decision making in regard to deciding how to act on the basis of the right data, learning to act over time while supporting ... -
Google Flu Trends Still Appears Sick: An Evaluation of the 2013-2014 Flu Season
(Social Science Electronic Publishing, 2014)In response to its poor performance during the 2012-2013 flu season, Google Flu Trends (GFT) engineers announced a redesign of the GFT algorithm. Two changes were made: (1) dampening anomalous media spikes and (2) using ... -
The Impact of Sugar Cane–Burning Emissions on the Respiratory System of Children and the Elderly
(National Institute of Environmental Health Sciences, 2006)We analyzed the influence of emissions from burning sugar cane on the respiratory system during almost 1 year in the city of Piracicaba in southeast Brazil. From April 1997 through March 1998, samples of inhalable particles ... -
Learning Outcome-Discriminative Dynamics in Multivariate Physiological Cohort Time Series
(Institute of Electrical and Electronics Engineers, 2013)Model identification for physiological systems is complicated by changes between operating regimes and measurement artifacts. We present a solution to these problems by assuming that a cohort of physiological time series ... -
Social Bot Detection Through Model-Based Time Series Clustering
(2021-06-04)In order to maintain the health and safety of online communities, it is important to understand and detect potential threats. Because of the possibility of large-scale impacts achieved through automation, social bots can ... -
A Test for the Presence of Covariance Between Time-Uncertain Series of Data with Application to the Dongge Cave Speleothem and Atmospheric Radiocarbon Records
(Wiley-Blackwell, 2010)[1] Statistical measures of the relationships between time series are generally altered by the presence of errors in timing, i.e., when applied to time-uncertain series. For example, the covariance sampled between two time ... -
Thou shalt not diversity: Why "Two of Every Sort"?
(Apt (Applied Probability Trust), 2007)This paper presents a study of the intertemporal propagation of distributional properties of phenotypes in general polygenic multisex inheritance models with sex- and time-dependent heritabilities. It further analyzes the ...