Results 41 to 50 of about 760,552 (308)

A Novel Estimation Approach of Pressure Gradient and Haemodynamic Stresses as Indicators of Pathological Aortic Flow Using Subvoxel Modelling [PDF]

IEEE Transactions on Biomedical Engineering, 2021
The flow downstream from aortic stenoses is characterised by the onset of shear-induced turbulence that leads to irreversible pressure losses. These extra losses represent an increased resistance that impacts cardiac efficiency. A novel approach is suggested in this study to accurately evaluate the pressure gradient profile along the aorta centreline ...
Pascal Corso, George Giannakopoulos, Utku Gulan, Christos Emmanouil Frouzakis, Markus Holzner   +4 more
openaire   +3 more sources

Hygro-Thermal Vibrations of Porous FG Nano-Beams Based on Local/Nonlocal Stress Gradient Theory of Elasticity

Nanomaterials, 2021
In this manuscript the dynamic response of porous functionally-graded (FG) Bernoulli–Euler nano-beams subjected to hygro-thermal environments is investigated by the local/nonlocal stress gradient theory of elasticity.
Rosa Penna, Luciano Feo, Giuseppe Lovisi, Francesco Fabbrocino   +3 more
doaj   +1 more source

Geometrical statistics and vortex structures in helical and nonhelical turbulences [PDF]

, 2010
In this paper we conduct an analysis of the geometrical and vortical statistics in the small scales of helical and nonhelical turbulences generated with direct numerical simulations.
Gulitski G., Moffatt H. K., Moreau J. J., Yi Li   +3 more
core   +1 more source

Matrix exponential-based closures for the turbulent subgrid-scale stress tensor [PDF]

, 2009
Two approaches for closing the turbulence subgrid-scale stress tensor in terms of matrix exponentials are introduced and compared. The first approach is based on a formal solution of the stress transport equation in which the production terms can be ...
C. Truesdell, Charles Meneveau, Gregory Eyink, H. Tennekes, J. D. Dollard, J. W. Deardorff, L. Chevillard, Laurent Chevillard, R. J. Adrian, S. B. Pope, W. J. Rugh, Y. Li, Yi Li   +12 more
core   +2 more sources

Gradient elasticity: a transformative stress analysis tool to design notched components against uniaxial/multiaxial high-cycle fatigue [PDF]

, 2016
This paper investigates the accuracy of gradient elasticity in estimating high-cycle fatigue strength of notched components subjected to both uniaxial and multiaxial fatigue loading. A novel design methodology is formulated by combining Ru and Aifantis’
Aifantis, Altan, Askes, Askes, Askes, Askes, Askes, Aztori, Bagni, Bagni, DuQuesnay, El Haddad, Frost, Frost, Gough, Harkegard, Harkegard, Jadallah, Kaufman, Kurath, Livieri, Lukas, Neuber, Nisitani, Peterson, Ru, Sheppard, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Susmel, Tanaka, Tanaka, Tanaka, Taylor, Taylor, Taylor, Ting, Tovo   +49 more
core   +1 more source

Ability of multiaxial fatigue criteria accounting for stress gradient effect for surface defective material

MATEC Web of Conferences, 2018
New high strength steels are widely used nowadays in many industrial areas as in automotive industry. These steels are more resistant and provide higher fatigue limits than latter ones but they are also more sensible to small defects.
Niamchaona Wichian, Pennec Fabienne, Tihay Kévin, Duchet Michel, Weber Bastien, Robert Jean-Louis   +5 more
doaj   +1 more source

Positron emission tomography (15O-water, 11C-acetate, 11C-HED) risk markers and nonsustained ventricular tachycardia in hypertrophic cardiomyopathy

International Journal of Cardiology: Heart & Vasculature, 2020
Background: The objectives of the study were to describe positron emission tomography (PET) parameters, using the tracers 15O-water at rest/stress, 11C-acetate, and 11C-HED, with regard to nonsustained ventricular tachycardia (NSVT) in hypertrophic ...
Peter Magnusson, Jonny Nordström, Hendrik J. Harms, Mark Lubberink, Fredrik Gadler, Jens Sörensen, Stellan Mörner   +6 more
doaj   +1 more source

Preparation and characterization of SEBS-g-MAH-filled flexible polyurethane foam composites with gradient-changing structure

Materials & Design, 2019
This study constructs a flexible gradient foaming structure by changes the maleic anhydride-grafted styrene-ethylene/butylene-styrene (SEBS-g-MAH) content on the basis of a two-step foaming technique.
Ting-Ting Li, Wenna Dai, Shih-Yu Huang, Hongyang Wang, Qi Lin, Ching-Wen Lou, Jia-Horng Lin   +6 more
doaj   +1 more source

Stronger diversity effects with increased environmental stress : a study of multitrophic interactions between oak, powdery mildew and ladybirds [PDF]

, 2017
Recent research has suggested that increasing neighbourhood tree species diversity may mitigate the impact of pests or pathogens by supporting the activities of their natural enemies and/or reducing the density of available hosts.
A Mougou, A Paquette, A Schmidtke, AA Satti, AM Sutherland, B Castagneyrol, B Marçais, BJ Cardinale, C Scherber, Christian Smit, D Aimar, D Bates, D Bert, D Nguyen, D Tilman, DC Weber, DH Truong, DK Letourneau, DU Hooper, FM Hamelin, GH Younes, H Jactel, H Jactel, HS Melidossian, J Haase, J Liang, J Rockström, J Tabata, JA Giorgi, K Verheyen, Kris Verheyen, L Copolovici, L Copolovici, LM de Almeida, M Dillen, M Hajji, M Toïgo, Martijn Buyse, Mathias Dillen, Monica Höfte, N Feau, O Rackham, P Pap, P Pap, Patrick De Clercq, R Kumar, RN Kigathi, Roberto Papa, S Rocha, S Sobek, T Jucker, U Niinemets, X Morin   +52 more
core   +4 more sources

An Initial Residual Stress Inference Method by Incorporating Monitoring Data and Mechanism Model

Chinese Journal of Mechanical Engineering, 2022
Initial residual stress is the main reason causing machining deformation of the workpiece, which has been deemed as one of the most important aspects of machining quality issues.
Shuguo Wang, Yingguang Li, Changqing Liu, Zhiwei Zhao   +3 more
doaj   +1 more source