Results 1 to 10 of about 689,003 (332)

Impact of observational error on heart rate variability analysis [PDF]

Heliyon, 2020
An observational error of heart rate variability (HRV) may arise from many factors, such as a limited sampling frequency, QRS complexes detection process, preprocessing procedures and others.
Monika Petelczyc, Jan Jakub Gierałtowski, Barbara Żogała-Siudem, Grzegorz Siudem   +3 more
doaj   +2 more sources

Measuring and controlling medical record abstraction (MRA) error rates in an observational study [PDF]

BMC Medical Research Methodology, 2022
Background Studies have shown that data collection by medical record abstraction (MRA) is a significant source of error in clinical research studies relying on secondary use data. Yet, the quality of data collected using MRA is seldom assessed.
Maryam Y. Garza, Tremaine Williams, Sahiti Myneni, Susan H. Fenton, Songthip Ounpraseuth, Zhuopei Hu, Jeannette Lee, Jessica Snowden, Meredith N. Zozus, Anita C. Walden, Alan E. Simon, Barbara McClaskey, Sarah G. Sanders, Sandra S. Beauman, Sara R. Ford, Lacy Malloch, Amy Wilson, Lori A. Devlin, Leslie W. Young   +18 more
doaj   +2 more sources

Observing errors in a combination of error and correct models favors observational motor learning [PDF]

BMC Neuroscience, 2022
Background Imitative learning is highly effective from infancy to old age; however, little is known about the effects of observing errors during imitative learning.
Zhi-Ming Tang, Yutaka Oouchida, Meng-Xin Wang, Zu-Lin Dou, Shin-Ichi Izumi   +4 more
doaj   +3 more sources

Efficient estimation method of population mean with non-response and observational error under ORRT models

Research in Statistics
This study addresses the difficulties faced by surveyors in collecting responses to sensitive questions, which lead to non-sampling errors such as non-response and observational error.
Sunil Kumar, Chanda Rani, Housila P. Singh, J. P. S. Joorel   +3 more
doaj   +2 more sources

A Statistical Approach to Determining the Uncertainty of Peat Thickness [PDF]

Mires and Peat, 2011
This paper presents statistical studies of peat thickness to define its expected maximum variation (∆dm(∆r)) as a function of separation distance Δr. The aim was to provide an estimate of the observational uncertainty in peat depth due to positioning ...
J. Torppa
doaj   +2 more sources

Empirical analysis and modeling of errors of atmospheric profiles from GPS radio occultation [PDF]

Atmospheric Measurement Techniques, 2011
The utilization of radio occultation (RO) data in atmospheric studies requires precise knowledge of error characteristics. We present results of an empirical error analysis of GPS RO bending angle, refractivity, dry pressure, dry geopotential height, and
U. Foelsche, Y.-H. Kuo, G. Kirchengast, A. K. Steiner, B. Scherllin-Pirscher   +4 more
doaj   +1 more source

Comparison of Propensity Score Weighting Methods to Remove Selection Bias in Average Treatment Effect Estimates

Uluslararası Türk Eğitim Bilimleri Dergisi, 2023
In this Monte Carlo simulation study, the performance of six different propensity score methods implemented through weighting cases was investigated: inverse probability of treatment weighting, truncated inverse probability of treatment weighting ...
Sungur Gürel, Walter Lana Leite
doaj   +1 more source

Causal linkage between adult height and kidney function: An integrated population-scale observational analysis and Mendelian randomization study.

PLoS ONE, 2021
As adult height is linked to various health outcomes, further investigation of its causal effects on kidney function later in life is warranted. This study involved a cross-sectional observational analysis and summary-level Mendelian randomization (MR ...
Sehoon Park, Soojin Lee, Yaerim Kim, Yeonhee Lee, Min Woo Kang, Kwangsoo Kim, Yong Chul Kim, Seung Seok Han, Hajeong Lee, Jung Pyo Lee, Kwon Wook Joo, Chun Soo Lim, Yon Su Kim, Dong Ki Kim   +13 more
doaj   +1 more source

Assimilation of Sentinel-1 Derived Sea Surface Winds for Typhoon Forecasting

Remote Sensing, 2017
High-resolution synthetic aperture radar (SAR) wind observations provide fine structural information for tropical cycles and could be assimilated into numerical weather prediction (NWP) models. However, in the conventional method assimilating the u and v
Yi Yu, Xiaofeng Yang, Weimin Zhang, Boheng Duan, Xiaoqun Cao, Hongze Leng   +5 more
doaj   +1 more source

Excursions in the Bayesian treatment of model error.

PLoS ONE, 2023
Advances in observational and computational assets have led to revolutions in the range and quality of results in many science and engineering settings.
L Mark Berliner, Radu Herbei, Christopher K Wikle, Ralph F Milliff   +3 more
doaj   +1 more source