Results 11 to 20 of about 89,049 (160)
Evaluation indicators of saturation on partially saturated sand induced by microbial gas
Case Studies in Construction Materials, 2022 The induced partial saturation (IPS) technique introduces a certain amount of air/gas into soil voids to mitigate sand liquefaction. The microbial desaturation method utilises biological metabolic processes which are good for environmental protection and
Meitong Lv, Dingwen Zhang, Haoming Ren
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Renal Oxygen Saturation as an Early Indicator of Shock in Children
Open Access Emergency Medicine, 2022 Neurinda Permata Kusumastuti,1,2 Teddy Ontoseno,2 Anang Endaryanto2 1Doctoral Program of Medical Science, Faculty of Medicine, Universitas Airlangga, Surabaya, East Java, Indonesia; 2Departement of Child Health, Dr.
Kusumastuti NP, Ontoseno T, Endaryanto A
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On the Saturation (or Not) of Geomagnetic Indices [PDF]
Frontiers in Astronomy and Space Sciences, 2021 Most geomagnetic indices are associated with processes internal to the magnetosphere-ionosphere system: convection, magnetosphere-ionosphere current systems, particle pressure, ULF wave activity, etc. The saturation (or not) of various geomagnetic indices under various solar-wind driver functions (a.k.a.
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Selecting a Regression Saturated by Indicators [PDF]
SSRN Electronic Journal, 2007 We consider selecting a regression model, using a variant of general-to-specific, when there are more variables than observations, in the special case that the variables are impulse dummies (indicators) for every observation. We show that the setting is unproblematic if tackled appropriately, and obtain the finite-sample distribution of estimators of ...
Hendry, David F. +2 more
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An Analysis of the Indicator Saturation Estimator as a Robust Regression Estimator [PDF]
SSRN Electronic Journal, 2008 An algorithm suggested by Hendry (1999) for estimation in a regression with more regressors than observations, is analyzed with the purpose of …nding an estimator that is robust to outliers and structural breaks. This estimator is an example of a one-step M-estimator based on Huber’s skip function.
Johansen, Søren, Nielsen, Bent
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Automatic selection of indicators in a fully saturated regression [PDF]
Computational Statistics, 2007 The problem of mean and variance estimation from an i.i.d. sample contaminated by outliers is discussed. The authors consider a linear regression model in which the presence of outliers is modeled by impulse dummy variables (indicators) added for some subset of the sample. Only significant indicators are to be included into the model.
Carlos Santos +2 more
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Archaeol: An Indicator of Methanogenesis in Water-Saturated Soils [PDF]
Archaea, 2012 Oxic soils typically are a sink for methane due to the presence of high-affinity methanotrophicBacteriacapable of oxidising methane. However, soils experiencing water saturation are able to host significant methanogenic archaeal communities, potentially affecting the capacity of the soil to act as a methane sink.
Lim, Katie L H +4 more
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Step-indicator saturation [PDF]
, 2013 Using an extension of general-to-specific modelling, based on the recent developments of impulse-indicator saturation (IIS), we consider selecting significant step indicators from a saturating set to capture location shifts. The approximate non-centrality of the test is derived for a variety of shifts using a 'split-half' analysis, the simplest ...
David Hendry +2 more
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Journal of Statistical Software, 2018 This paper provides an overview of the R package gets, which contains facilities for automated general-to-specific (GETS) modeling of the mean and variance of a regression, and indicator saturation (IS) methods for the detection and modeling of outliers ...
Felix Pretis +2 more
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Evaluating Forecasts, Narratives and Policy Using a Test of Invariance
Econometrics, 2017 Economic policy agencies produce forecasts with accompanying narratives, and base policy changes on the resulting anticipated developments in the target variables.
Jennifer L. Castle +2 more
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