Results 41 to 50 of about 67,991 (292)

Clinical Evaluation of CA 15.3 in the Post-operative Follow-up of Breast Cancer Patients

open access: yesThe International Journal of Biological Markers, 1990
In 265 patients operated for breast carcinoma the monoclonal antibody serum test CA 15.3 was predictive of metastatic diffusion of the disease. Its level increased in cases of distant metastasis with no significant difference between multiple and single ...
M. Scaramuzzi   +6 more
doaj   +1 more source

An advanced meshless method for time fractional diffusion equation [PDF]

open access: yes, 2011
Recently, because of the new developments in sustainable engineering and renewable energy, which are usually governed by a series of fractional partial differential equations (FPDEs), the numerical modelling and simulation for fractional calculus are ...
Gu Y. T.   +7 more
core   +2 more sources

Comment on "Quantum Monte Carlo study of the dipole moment of CO" [J. Chem. Phys. 110, 11700 (1999)]

open access: yes, 1999
Recently Schautz and Flad concluded that the Hellmann-Feynman theorem holds within the fixed-node diffusion quantum Monte Carlo (DMC) method. We show that the Hellmann-Feynman expression is not in general equal to the derivative of the DMC energy with ...
Huang, K. C.   +2 more
core   +1 more source

Test-retest reliability of structural brain networks from diffusion MRI [PDF]

open access: yes, 2014
Structural brain networks constructed from diffusion MRI (dMRI) and tractography have been demonstrated in healthy volunteers and more recently in various disorders affecting brain connectivity.
Bastin, Mark E.   +4 more
core   +1 more source

Error analysis of a variational multiscale stabilization for convection-dominated diffusion equations in 2d [PDF]

open access: yes, 2016
We formulate a stabilized quasi-optimal Petrov-Galerkin method for singularly perturbed convection-diffusion problems based on the variational multiscale method.
Li, Guanglian   +2 more
core   +3 more sources

Risk Prediction Models for Recurrence After Curative Treatment of Early‐Stage or Locally Advanced Lung Cancer: A Systematic Review

open access: yesAging and Cancer, EarlyView.
This systematic review synthesizes prognostic models for survival and recurrence in resected non‐small cell lung cancer. While many models demonstrate moderate to good discrimination, few are externally validated and reporting quality is variable, limiting clinical applicability and highlighting the need for robust, transparent model development ...
Evangeline Samuel   +4 more
wiley   +1 more source

Quantification of hydraulic redistribution in maize roots using neutron radiography

open access: yesVadose Zone Journal, 2020
Plants redistribute water from wet to dry soil layers through their roots, in the process called hydraulic redistribution. Although the relevance and occurrence of this process are well accepted, resolving the spatial distribution of hydraulic ...
Faisal Hayat   +4 more
doaj   +1 more source

A Nodal-iterative Technique for Criticality Calculations in Multigroup Neutron Diffusion Models

open access: yesTrends in Computational and Applied Mathematics, 2022
In this work, a nodal and iterative technique to evaluate the effective multiplication factor as well as the neutron flux, in multigroup diffusion problems, is presented.
R. Zanette   +2 more
doaj   +1 more source

Development of an Analytic Nodal Diffusion Solver in Multigroups for 3D Reactor Cores with Rectangular or Hexagonal Assemblies. [PDF]

open access: yes, 2009
More accurate modelling of physical phenomena involved in present and future nuclear reactors requires a multi-scale and multi-physics approach. This challenge can be accomplished by the coupling of best-estimate core-physics, thermal-hydraulics and ...
Aragonés Beltrán, José María   +2 more
core   +1 more source

Transport Corrections in Nodal Diffusion Codes for HTR Modeling [PDF]

open access: yes, 2010
The cores and reflectors of High Temperature Reactors (HTRs) of the Next Generation Nuclear Plant (NGNP) type are dominantly diffusive media from the point of view of behavior of the neutrons and their migration between the various structures of the reactor.
Ougouag, Abderrafi M.   +1 more
openaire   +2 more sources

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