Results 21 to 30 of about 18,081 (306)

Sampling Methods and Risk Stratification Regarding Environmental Contamination by SARS-CoV-2

open access: yesActa Médica Portuguesa, 2021
Introduction: Transmission of COVID-19 through close contact and droplets is well established, but the influence of aerosol and surface contamination remains to be determined.
Marta Mendes   +7 more
doaj   +1 more source

Preservation of positivity by dynamical coarse graining [PDF]

open access: yesPhysical Review A, 2008
18 pages, 7 figures, reviewers suggestions included and tightened presentation; accepted for publication in ...
Schaller, Gernot, Brandes, Tobias
openaire   +2 more sources

Deformation field correction to preserve topology for image registration

open access: yesESAIM: Proceedings and Surveys, 2014
In this paper, the author addresses the issue of designing a theoretically well-motivated and computationally efficient method ensuring topology preservation on image-registration-related deformation fields.
Ozeré Solène
doaj   +1 more source

Energy stable numerical methods for porous media flow type problems

open access: yesOil & Gas Science and Technology, 2018
Many problems arising in the context of multiphase porous media flows that take the form of degenerate parabolic equations have a dissipative structure, so that the energy of an isolated system is decreasing along time.
Cancès Clément
doaj   +1 more source

Effect of storage time of paraffin sections on the expression of PD-L1 (SP142) in invasive breast cancer

open access: yesDiagnostic Pathology, 2023
Background PD-L1 staining using long-stored paraffin sections may not be consistent with the true PD-L1 expression of patients. Therefore, it is necessary to explore the expression of PD-L1(SP142) in paraffin sections of invasive breast cancer with ...
Jiankun He   +9 more
doaj   +1 more source

Positivity Preserving Multiapproximation

open access: yesAmerican Journal of Scientific and Industrial Research, 2012
We show that the degree of copositive multipolynomial approximation to a function which changes signs finitely many times in , can be estimated by ...
Eman Bhaya, Mayada Ali
openaire   +1 more source

Entanglement of formation dynamics of a two-mode system in a common Gaussian noisy channel [PDF]

open access: yesKragujevac Journal of Science
Entanglement of formation is a measure that has a clear physically motivated definition, namely, it provides a lower bound over all pure-state entanglement decompositions required to create a given state.
Stoica Alina   +2 more
doaj   +1 more source

Comparison of single-pore non-liposuction near-infrared laparoscopy with conventional open surgery for axillary sentinel lymph node biopsy in patients with early breast cancer: a single-center, small-sample retrospective study

open access: yesWorld Journal of Surgical Oncology, 2023
Background This study aimed to compare the effects of single-pore non-liposuction near-infrared (NIR) endoscopic surgery and traditional open surgery for axillary sentinel lymph node biopsy (SLNB) in patients with early breast cancer (EBC).
Cheng-cai Yao, Changchun Liu, Jiayi Xian
doaj   +1 more source

Arbitrary order positivity preserving finite-volume schemes for 2D elliptic problems

open access: yes, 2023
International audienceThe positivity preservation is very important in most applications solving elliptic problems. Many schemes preserving positivity has been proposed but are at most second-order convergent.
Blanc, Xavier   +3 more
core   +1 more source

K-Polar Neutrosophic Assessment of Ideological and Political Classroom Teaching in Higher Vocational Colleges Under the Blended Teaching Model [PDF]

open access: yesNeutrosophic Sets and Systems
We propose a context-coupled extension of k-polar neutrosophic sets in which an interaction matrix 𝐾 explicitly models dependencies among poles. Within this framework, we introduce the 𝐾-fusion operator and a context-aware necessity-possibility pair ...
Songpo Zhang
doaj   +1 more source

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