Results 31 to 40 of about 563,810 (336)

Bivariate Entropy Analysis of Electrocardiographic RR–QT Time Series

Entropy, 2020
QT interval variability (QTV) and heart rate variability (HRV) are both accepted biomarkers for cardiovascular events. QTV characterizes the variations in ventricular depolarization and repolarization. It is a predominant element of HRV.
Bo Shi, Mohammod Abdul Motin, Xinpei Wang, Chandan Karmakar, Peng Li   +4 more
doaj   +1 more source

Single-index modulated multiple testing

, 2014
In the context of large-scale multiple testing, hypotheses are often accompanied with certain prior information. In this paper, we present a single-index modulated (SIM) multiple testing procedure, which maintains control of the false discovery rate ...
Du, Lilun, Zhang, Chunming
core   +2 more sources

Chain Plot: A Tool for Exploiting Bivariate Temporal Structures [PDF]

, 2004
In this paper we present a graphical tool useful for visualizing the cyclic behaviour of bivariate time series. We investigate its properties and link it to the asymmetry of the two variables concerned.
A Zempléni, Bloomfield, C.C Taylor, Makra, Schmid, Shepp   +5 more
core   +1 more source

Wavelet Cross-correlation in Bivariate Time-Series Analysis

Trends in Computational and Applied Mathematics, 2018
The estimation of the correlation between independent data sets using classical estimators, such as the Pearson coefficient, is well established in the literature. However, such estimators are inadequate for analyzing the correlation among dependent data.
Eniuce Menezes de Souza, Vinícius Basseto Félix   +1 more
doaj   +1 more source

A mixed effect model for bivariate meta-analysis of diagnostic test accuracy studies using a copula representation of the random effects distribution [PDF]

, 2015
Diagnostic test accuracy studies typically report the number of true positives, false positives, true negatives and false negatives. There usually exists a negative association between the number of true positives and true negatives, because studies that
Arends, Aristidis K. Nikoloulopoulos, Brechmann, Chu, Chu, Chu, Chu, Demidenko, Genest, Genest, Genest, Genest, Glas, Hamza, Harbord, Harbord, Heffernan, Hua, Hult, Jackson, Jackson, Joe, Joe, Joe, Joe, Kurowicka, Kuss, Lee, Ma, Mavridis, Mavridis, Nash, Nelsen, Nikoloulopoulos, Nikoloulopoulos, Nikoloulopoulos, Nikoloulopoulos, Nikoloulopoulos, Nikoloulopoulos, Normand, Paul, Reitsma, Riley R, Rutter, Rücker, Sarmanov, Scheidler, Serfling, Shen, Sklar, Stroud, Vuong   +51 more
core   +2 more sources

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

A Tale of Two Unprecedented Droughts in Southeast Asia: Physical Drivers and Impending Future Risks

Earth's Future
Conventional wisdom suggests that tropical droughts in Southeast Asia are closely linked to natural climate variability like El Niño. However, the extreme 2014 drought occurred independently of El Niño, suggesting other dynamic forcings at play.
Shuping Ma, Xiao Peng, Xinyue Liu, Zhongwang Wei, Zhixiao Niu, Wenpeng Zhao, Ming Pan, Xiaogang He   +7 more
doaj   +1 more source

A Statistical Method for Estimating Luminosity Functions using Truncated Data [PDF]

, 2007
The observational limitations of astronomical surveys lead to significant statistical inference challenges. One such challenge is the estimation of luminosity functions given redshift $z$ and absolute magnitude $M$ measurements from an irregularly ...
Chad M. Schafer, Choloniewski J., Efstathiou G., Hall P., Jackson J., Lynden-Bell D., Nicoll J., Rudemo M., Stone C.   +8 more
core   +3 more sources

Prognostic Implications of Sleep Architecture for Patients Admitted to the Intensive Care Unit With Status Epilepticus

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Status epilepticus (SE) is associated with significant mortality. Sleep architecture may reflect normal brain function. Impaired sleep architecture is associated with poorer outcomes in numerous conditions. Here we investigate the association of sleep architecture in continuous EEG (cEEG) with survival in SE.
Ran R. Liu, Marcus C. Ng, Gavin P. Winston, Sabrina Schaly, Garima Shukla, Lysa Boissé Lomax   +5 more
wiley   +1 more source

Joint spatial modelling of disease risk using multiple sources: an application on HIV prevalence from antenatal sentinel and demographic and health surveys in Namibia

Global Health Research and Policy, 2017
Background In disease mapping field, researchers often encounter data from multiple sources. Such data are fraught with challenges such as lack of a representative sample, often incomplete and most of which may have measurement errors, and may be ...
D. Ntirampeba, I. Neema, L. N. Kazembe
doaj   +1 more source