Results 71 to 80 of about 76,654 (163)

Coupled Clustering in Hierarchical Matrices for the Oseen Problem

International Journal for Numerical Methods in Fluids, EarlyView.
Fluid flow problems can be modelled by the Navier‐Stokes or, after linearization, by the Oseen equations. Their discretization results in linear systems in saddle point form which are typically very large and need to be solved iteratively. We propose a novel block structure for hierarchical matrices which is then used to build preconditioners for the ...
Jonas Grams, Sabine Le Borne
wiley   +1 more source

Machine Learning Approaches to Forecast the Realized Volatility of Crude Oil Prices

Journal of Forecasting, EarlyView.
ABSTRACT This paper presents an evaluation of the accuracy of machine learning (ML) techniques in forecasting the realized volatility of West Texas Intermediate (WTI) crude oil prices. We compare several ML algorithms, including regularization, regression trees, random forests, and neural networks, to several heterogeneous autoregressive (HAR) models ...
Talha Omer, Kristofer Månsson, Pär Sjölander, Gazi Salah Uddin   +3 more
wiley   +1 more source

Efficient local strategies for vaccination and network attack

, 2004
We study how a fraction of a population should be vaccinated to most efficiently top epidemics. We argue that only local information (about the neighborhood of specific vertices) is usable in practice, and hence we consider only local vaccination ...
Erdös P., Giesecke J., P Holme, Schneeberger A., Zachary W.   +4 more
core   +1 more source

Variations in trajectories of emotional and behavioural symptoms in children and young people with pre‐existing mental health and neurodevelopmental conditions before and during the COVID‐19 pandemic: A nested data linkage clinical cohort study

JCPP Advances, EarlyView.
Abstract Background Children and young people with pre‐existing mental health and neurodevelopmental conditions may have experienced heterogeneous mental health impacts during the COVID‐19 pandemic, but what facts may explain these variations are still unclear. We aimed to examine variations in the longitudinal trajectories of emotional and behavioural
Brian C. F. Ching, Alice Wickersham, Dominic Stringer, Sarjhana Ragunathan Brindha, Craig Colling, Ruby Morton, Valeria Parlatini, Johnny Downs, Emily Simonoff   +8 more
wiley   +1 more source

Refined Analysis of the Electroweak Precision Data

, 1995
We refine our recent analysis of the electroweak precision data at the \PZO\ pole by including the hadronic decay modes of the \PZO. Within the framework of an effective Lagrangian we parametrize $SU(2)$ violation by the additional process-specific ...
Abe, Altarelli, Barbieri, Barbieri, Bilenky, Burkhardt, Catani, Chetyrkin, D. Schildknecht, Degrassi, Denner, Denner, Denner, Dittmaier, Djouadi, Djouadi, Ellis, Fleischer, Fleischer, Gambino, Geshkenbein, Gorishny, Hioki, Kennedy, Kennedy, Kennedy, Kneur, Kniehl, Kniehl, Kuroda, Lynn, M. Kuroda, Novikov, S. Dittmaier, Schaile   +34 more
core   +1 more source

Projected 21st Century Changes in Precipitation and Temperature Over Italy Using CMIP6 CMCC‐CM2‐SR5 Model and COSMO‐CLM Dynamical Downscaling

International Journal of Climatology, EarlyView.
This study evaluates the COSMO‐CLM regional climate model over Italy under CMIP6 scenarios. Compared to its driving global model, COSMO‐CLM reduces temperature biases by 50%–75% and better represents precipitation and extremes, adding critical mesoscale detail.
Alejandro Vichot‐Llano, Mario Raffa, Angelo Campanale, Marianna Adinolfi, Gabriella Ceci, Paola Mercogliano   +5 more
wiley   +1 more source

The Bazaar as a Model for Knowledge Work

Knowledge and Process Management, EarlyView.
ABSTRACT This paper presents fieldwork that extends existing metaphors of knowledge work as a process shaped by hierarchical or market forces. A qualitative, ethnographic study of six knowledge‐intensive businesses in two countries identifies striking parallels with the Middle Eastern bazaar in contrast to Western impersonal markets and hierarchies. We
Reed Elliot Nelson, Andrew B. Hargadon, José Osvaldo De Sordi   +2 more
wiley   +1 more source

The transition to chaos of coupled oscillators: An operator fidelity susceptibility study

, 2010
The operator fidelity is a measure of the information-theoretic distinguishability between perturbed and unperturbed evolutions. The response of this measure to the perturbation may be formulated in terms of the operator fidelity susceptibility (OFS), a ...
Giorda, Paolo, Jacobson, N. Tobias, Zanardi, Paolo   +2 more
core   +1 more source

Comparison between fluorometry and microscopy‐based phytoplankton assessments in the Laurentian Great Lakes

Limnology and Oceanography: Methods, EarlyView.
Abstract Photosynthetic pigment fluorescence is commonly used in limnology and oceanography as a proxy for phytoplankton biomass. Fluorometry has been used to detect subsurface algal blooms, characterize dynamics of the deep chlorophyll layer, and to provide greater vertical resolution to phytoplankton monitoring.
Katya E. Kovalenko, Euan D. Reavie, Christopher T. Filstrup, Anne Scofield, Meaghan Lightfoot, Erica Yang, Elizabeth E. Alexson   +6 more
wiley   +1 more source

Random Networks with Tunable Degree Distribution and Clustering

, 2004
We present an algorithm for generating random networks with arbitrary degree distribution and Clustering (frequency of triadic closure). We use this algorithm to generate networks with exponential, power law, and poisson degree distributions with ...
D. J. Watts, D. Stauffer, Erik Volz, L. A. N. Amaral, L. Ancel-Meyers, L. Barabasi, M. Molloy, S. N. Dorogovtsev, S. P. Blythe   +8 more
core   +2 more sources