Results 101 to 110 of about 20,730 (256)

More adequate probability distributions to represent the saturated soil hydraulic conductivity

Scientia Agricola, 2002
The saturated soil hydraulic conductivity (Ksat) is one of the most relevant variables in studies of water and solute movement in the soil. Its determination in the laboratory and in the field yields high dispersion results, which could be an indication ...
Maria da Glória Bastos de Freitas Mesquita, Sérgio Oliveira Moraes, José Eduardo Corrente   +2 more
doaj  

Modelling NO2 emissions at Eskom’s Lethabo coal fired power station

Discover Environment
This study uses three relatively heavy tailed statistical distributions commonly applied in air pollution, namely, the Weibull, Lognormal and Pareto distributions, to characterise the NO2 emissions data (tons) from Lethabo coal fired power station, owned
Mpendulo Wiseman Mamba, Delson Chikobvu
doaj   +1 more source

Animal‐Mediated Dispersal and Clonal Growth Drive Prunus cerasus Invasion in Andean Temperate Forest

Integrative Zoology, EarlyView.
Prunus cerasus reproduces by clonality and by seed dispersal and germination. P. cerasus is invading Patagonian protected areas. The relative relevance of germination and clonal reproduction changes along the time of P. cerasus arrival at a site. Seed dispersal by foxes is primarily responsible for the spread of P. cerasus to new areas.
Matias O. Berrondo, Susana P. Bravo
wiley   +1 more source

Handling mean–variance scaling in intraspecific trait variability and implications for trait–environment analyses

Methods in Ecology and Evolution, EarlyView.
Abstract Trait‐based ecology increasingly relies on measures of intraspecific trait variability to estimate how trait diversity within species varies across species and environmental gradients. Yet variance and related metrics are often interpreted without considering their intrinsic dependence on the mean, as described by the empirical Taylor's power ...
Miguel A. Ortega, Francesco de Bello, José Ramón Obeso, Paola Laiolo   +3 more
wiley   +1 more source

A phenotype‐based framework to measure functional redundancy in microbial ecosystems

Methods in Ecology and Evolution, EarlyView.
Abstract Functional redundancy is a key biological concept that offers critical insights into microbial ecosystem stability and responses to environmental perturbations. Existing methods to quantify redundancy typically rely on gene annotations as functional units, limiting their ability to capture complex or partially characterised traits and making ...
Sofia Fraulini, Davide Sanguineti, Guido Zampieri, Laura Treu, Stefano Campanaro   +4 more
wiley   +1 more source

Mitigating policy uncertainty: What financial markets reveal about firm‐level lobbying

American Journal of Political Science, EarlyView.
Abstract Elections can lead to substantial policy changes and, thus, are a significant source of risk. Firms can respond to such policy uncertainty by lobbying, but it is hard to quantify whether they do so and, if so, how much lobbying benefits them. We construct a new dataset and leverage investors’ expectations of variability in stock returns in the
Kristy Buzard, Nathan Canen, Sebastian Saiegh   +2 more
wiley   +1 more source

Grading‐labour cost analysis of AI‐assisted versus human‐only diabetic retinopathy screening in two Danish healthcare settings

Acta Ophthalmologica, EarlyView.
Abstract Purpose Diabetic retinopathy (DR) screening is essential to prevent vision loss, yet rising diabetes prevalence threatens to outpace ophthalmology capacity. Artificial intelligence (AI) systems can triage retinal images to reduce clinician workload, but economic evidence from high‐income, tax‐funded health systems remains limited.
Lars Grønlykke, Sebastian Wiberg, Alex Carter, Peter Heilbo Ratgen, Simon Joel Lowater, Jakob Kristian Holm Andersen, Thiusius Rajeeth Savarimuthu, Jakob Grauslund   +7 more
wiley   +1 more source

IRT‐based response style models and related methodology: Review and commentary

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract We provide a review and commentary on recent methodological research related to item response theory (IRT) modelling of response styles in psychological measurement. Our review describes the different categories of IRT models that have been proposed, their associated assumptions and extensions, and the varying purposes they can serve.
Daniel M. Bolt, Lionel Meng
wiley   +1 more source

Multidimensional unipolar IRT and applications to the measurement of print exposure

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Item response theory (IRT) has been a prominent modelling framework in educational and psychological measurement. Traditional IRT models are bipolar, commonly assuming symmetric measurement link functions and symmetric trait distributions over a latent continuum unbounded at both ends. However, many measured constructs, such as print exposure,
Qi (Helen) Huang, Daniel M. Bolt
wiley   +1 more source

Análisis bayesiano para la distribución lognormal generalizada aplicada a modelos de falla con censura Bayesian Analysis for the Generalized Lognormal Distribution Applied to Failure Time Analysis

Revista Colombiana de Estadística, 2011
Existen varias versiones de la distribución lognormal en la literatura estadística y una de ellas está basada en la transformación exponencial de la distribución normal generalizada (NG).
FREDDY HERNÁNDEZ, OLGA CECILIA USUGA
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