Results 91 to 100 of about 5,774,152 (370)

Positive definite metric spaces [PDF]

open access: yesPositivity, 2012
v5: Corrected some misstatements in the last few paragraphs.
openaire   +4 more sources

Quantum state estimation

open access: yes, 1996
New algorithm for quantum state estimation based on the maximum likelihood estimation is proposed. Existing techniques for state reconstruction based on the inversion of measured data are shown to be overestimated since they do not guarantee the positive
C. W. Helstrom, J. Perina, Z. Hradil
core   +1 more source

High‐Throughput Encapsulation of Stem Cells: Characterizing Dynamic Culture Variability With a Millifluidic Approach

open access: yesAdvanced Healthcare Materials, EarlyView.
A high throughput millifluidic encapsulation platform is engineered and standardized. The system's output allows the monitoring of cell expansion in strong dynamic conditions. High polymer crosslinking leads to higher cell proliferation and lower cell growth on microgel's surface.
Oscar Fabian García‐Aponte   +6 more
wiley   +1 more source

Positivity of convolution quadratures generated by nonconvex sequences

open access: yesComptes Rendus. Mathématique
The positive definiteness of real quadratic forms of convolution type plays an important role in the stability analysis of time-stepping schemes for nonlocal models.
Karaa, Samir
doaj   +1 more source

On The Positive Definiteness of Polarity Coincidence Correlation Coefficient Matrix

open access: yes, 2008
Polarity coincidence correlator (PCC), when used to estimate the covariance matrix on an element-by-element basis, may not yield a positive semi-definite (PSD) estimate. Devlin et al.
Aref, Mohammad Reza   +2 more
core   +1 more source

Biphasic Granular Bioinks for Biofabrication of High Cell Density Constructs for Dermal Regeneration

open access: yesAdvanced Healthcare Materials, EarlyView.
This study introduces a biphasic granular bioink (µInk) that enables 3D bioprinting of high cell density constructs for dermal regeneration. The bioink promotes cell proliferation, ECM deposition, and neovascularization, leading to tissue integration and reduced scar formation in vivo.
Rozalin Shamasha   +16 more
wiley   +1 more source

On Jacobi's condition for the simplest problem of calculus of variations with mixed boundary conditions

open access: yes, 2015
The purpose of this paper is the extension of Jacobi's criteria for positive definiteness of second variation of the simplest problems of calculus of variations subject to mixed boundary conditions.
Batista, Milan
core   +1 more source

Recent Advances in Heterogeneous Frustrated Lewis Pair: Synthesis, Characterization, and Catalysis

open access: yesAdvanced Materials, EarlyView.
This review provides a concise analysis of heterogeneous frustrated Lewis pair (FLP) chemistry, focusing on their synthesis, characterization, and application in small‐molecule activation. It highlights current challenges in developing solid FLP systems and explores promising advancements through emerging technologies, offering critical insights into ...
Jiasi Li   +2 more
wiley   +1 more source

Characterization of quadratic growth of extended-real-valued functions

open access: yesJournal of Inequalities and Applications, 2016
This paper shows that the sharpest possible bound in the second-order growth condition of a proper lower semicontinuous function can be attained under some assumptions. We also establish a relationship among strong metric subregularity, quadratic growth,
Jin jiang Wang, Wen Song
doaj   +1 more source

Real wave propagation in the isotropic relaxed micromorphic model

open access: yes, 2016
For the recently introduced isotropic relaxed micromorphic generalized continuum model, we show that under the assumption of positive definite energy, planar harmonic waves have real velocity.
Abreu, Rafael   +5 more
core   +2 more sources

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