Results 71 to 80 of about 1,562 (177)

Seismic Risk of Critical Transport Systems: Sensitivity Analysis of the Campania Railway Network to Bradyseism's Features

Risk Analysis, Volume 46, Issue 8, August 2026.
ABSTRACT This study examines the impact of epistemic uncertainties on the seismic risk of a critical transport system, the Campania railway network, during the ongoing bradyseismic unrest at Campi Flegrei, south of Italy. Seismic risk is quantified as the length of the railway requiring post‐event inspection, an operational proxy for service disruption.
Raffaele De Risi, Francesco Pugliese, Jitendra Agarwal, Francisco Pinto   +3 more
wiley   +1 more source

Model Selection for the Mean Function of Kriging Models

Journal of Education and Science
Kriging models are used in many scientific disciplines to investigate the behavior of physical systems. In the Kriging model (KM), the response of the computer simulation code (CSC) is considered to have a Gaussian process (GP). To discover variables influencing responses, choosing a selection of variables or creating a strongly reduced regression ...
Najlaa Sadeek Yahya, Younus Y. Al-Taweel, Luma Ahmad Khaleel   +2 more
openaire   +1 more source

Modeling Potential Environmental Impacts of Science Activity in Antarctica

Transactions in GIS, Volume 30, Issue 5, August 2026.
ABSTRACT We use GPS data collected on science expeditions in Antarctica to estimate hiking functions for the speed at which humans traverse terrain differentiated by slope and by ground cover (moraines and rock). We use the estimated hiking functions to build weighted directed graphs as a representation of specific environments in Antarctica.
David O'Sullivan, Fraser J. Morgan
wiley   +1 more source

Spatial Modelling of Soil Quality Index Using Regression–Kriging and Delineation of Nutrient Management Zones in High-Andean Quinoa Fields, Southern Peru

Agronomy
The pronounced heterogeneity of high-Andean soils constitutes a critical constraint to the sustainable productivity of quinoa in southern Peru, where current yields (1.6 t ha−1) remain well below potential (>5 t ha−1).
Nestor Cuellar-Condori, Sharon Mejia, Robert Quiñones, Ruth Mercado, Ali Cristhian, Karla Chávez-Zea, Elvis Ccosi, Madeleiny Cahuide, Kenyi Quispe   +8 more
doaj   +1 more source

Ozone Risk Assessment and Mapping in the Alps Based on Data from Passive Samplers

The Scientific World Journal, 2002
Passive samplers (diffusion tubes with organic reagent, produced by Passam of Switzerland) were used in a sampling campaign for the detection of weekly mean ozone concentrations in 15 sites over a domain of 80 x 40 km on the southern side of the European
Cristina Mazzali, Elisabetta Angelino, Giacomo Gerosa, Antonio Ballarin-Denti   +3 more
doaj   +1 more source

Statistical methods and transport modeling to assess PCE hotspots and diffuse pollution in groundwater (Milan FUA)

Acque Sotterranee, 2017
The Italian law 152/2006 adopted the EU Water Framework Directive principles and delegated to the Regions the task of identifying areas subject to groundwater diffuse pollution.
Loris Colombo
doaj   +1 more source

Pointwise Consistency of the Kriging Predictor with Known Mean and Covariance Functions

, 2010
This paper deals with several issues related to the pointwise consistency of the kriging predictor when the mean and the covariance functions are known. These questions are of general importance in the context of computer experiments. The analysis is based on the properties of approximations in reproducing kernel Hilbert spaces.
Vazquez, Emmanuel, Bect, Julien
openaire   +3 more sources

The influence of correlation functions on stochastic kriging metamodels [PDF]

Proceedings of the 2010 Winter Simulation Conference, 2010
Wei Xie 0010, Barry L. Nelson, Jeremy Staum   +2 more
openaire   +1 more source

A Universal Kriging predictor for spatially dependent functional data of a Hilbert Space

Electronic Journal of Statistics, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
MENAFOGLIO, ALESSANDRA, SECCHI, PIERCESARE, M. Dalla Rosa   +2 more
openaire   +2 more sources

Geographical Environment and Plant Functional Group Shape the Spatial Variation Pattern of Plant Carbon Density in Subalpine-Alpine Grasslands of the Eastern Loess Plateau, China

Agronomy
The carbon density of subalpine-alpine grasslands (SGs) is significantly vital to sustaining the carbon cycle in global terrestrial ecosystems. However, on the Loess Plateau of China, it remains unclear how the geographical environment and plant ...
Manhou Xu, Jiaying Wang, Kunkun Wei, Jie Li, Xiuli Yu   +4 more
doaj   +1 more source