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Impact of SARS-CoV-2 Pandemic on Neuroinfectious Etiology in the Lazio Region: Evidence from Laboratory-Based Surveillance Analysis. [PDF]

Viruses
Rueca M, Leone S, Valli MB, De Carli G, Maffongelli G, Lalle E, Forbici F, Fusco MC, Amendola A, Fabeni L, Giancola ML, Agresta A, Ascoli Bartoli T, Nicastri E, Maggi F, Vairo F.   +15 more
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Clinico-Epidemiological Profile of Leptospirosis Among Patients Attending a Tertiary Care Center in Rajasthan. [PDF]

Cureus
Sharma RK, Gupta S, Sharma M, Sharma P, Sharma H, Tiwari S, Shewale A, Kuwatada J, Malhotra B.   +8 more
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Nocturnal cough as a syndromic surveillance signal for respiratory illness in England

Irons T, Carlsson E, Tang M, Mellor J, Rubin C, Allen A, Elliot AJ, Kågebäck M, Packham J.   +8 more
europepmc   +1 more source

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Compressions of Totally Positive Matrices

SIAM Journal on Matrix Analysis and Applications, 2006
The paper deals with the total positivity of the compressed matrix of a totally positive matrix \(A\). Consider \(nk \times nk\) partitioned matrices \(A=(A_{ij})_{i,j=1}^k\), in which each block \(A_{ij}\) is \(n \times n\). The \(k \times k\) compressed matrix is defined by \[ C_k(A)=(\det A_{ij})_{i,j=1}^k.
Shaun M. Fallat, Allen Herman, Michael I. Gekhtman, Charles R. Johnson   +3 more
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On Totally Positive Discrete- Time Systems

2019 27th Mediterranean Conference on Control and Automation (MED), 2019
A matrix is called totally positive (TP) if all its minors are positive. A linear time-varying system is called a totally positive discrete-time system (TPDTS) if the matrix defining its evolution is TP for all time. It was recently shown that this can be used to prove strong asymptotic properties of certain time-varying nonlinear discrete-time systems.
Rami Katz, Michael Margaliot, Emilia Fridman   +2 more
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A Hurwitz Matrix is Totally Positive

SIAM Journal on Mathematical Analysis, 1982
If the real polynomial $f(w) = \sum_0^n {d_j } w^{n - j} $ with $d_0 > 0$ has all its zeros in $\operatorname{Re} (w) \leqq 0$, then the infinite matrix H with elements $H_{i,j} = d_{2j - i} $ is totally positive. As a consequence, a real polynomial $\sum_j {b_j w^j } $ has at least $M = \max (\sigma _0 ,\sigma _1 )$ zeros in each half plane ...
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Positivity explains how COVID-19 perceived risk increases death distress and reduces happiness

Personality and Individual Differences, 2021
Abdurrahim Güler, Murat Yildirim
exaly  

The effect of emotional positivity of brand-generated social media messages on consumer attention and information sharing

Journal of Business Research, 2022
Martin Sykora, Vitor Castro, Suzanne Elayan   +2 more
exaly  

Total Positivity and Splines

1996
This paper gives a review of univariate splines and B-splines, with special emphasis on total positivity. In particular, we show that the B-spline basis is totally positive, and we give a proof of the SchoenbergWhitney theorem by first establishing the result for the so-called truncated power basis.
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The e-positivity and Schur positivity of some spiders and broom trees

Discrete Applied Mathematics, 2023
David Wang
exaly