Results 81 to 90 of about 285,483 (304)

Determinantal criteria for total positivity

, 2001
A matrix is totally positive (respectively, strictly totally positive) if all its minors are nonnegative (respectively, positive). In this paper, we revisit the main determinantal criteria for these matrices and provide two new ones: one of them for the ...
J.M. Peña, Peña, J.M.
core   +1 more source

Infection Control Practices for Vascular Access Management in Hemodialysis: Results From a Nationwide Survey of Japanese National University Hospitals

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Bloodstream infections due to repeated vascular access (VA) puncture and circuit connections remain major concerns in hemodialysis. Therefore, we examined current practices for glove, disinfectant, and personal protective equipment (PPE) use according to VA type in national university hospitals in Japan.
Aiko Yamada, Makoto Harada, Tadahiko Kikugawa, Takeshi Nakata, Koji Hashimoto, Tsuneo Konta, Yuji Kamijo   +6 more
wiley   +1 more source

On the total—and strict total—Positivity of the kernels associated with parabolic initial boundary value problems

, 1986
This paper is concerned with the total—and strict total—positivity of the integral kernels which relate the solutions of parabolic initial boundary value problems to the initial and boundary data.
E.J.P.Georg Schmidt, Schmidt, E.J.P.Georg   +1 more
core   +1 more source

Prognosis of Long‐Term Continuous Renal Replacement Therapy and the Impact of Combined Continuous Intravenous Sodium Infusion Therapy

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients requiring long‐term continuous renal replacement therapy (CRRT) generally have poor prognoses. This study evaluated whether adding continuous intravenous sodium infusion (cIVNa) is associated with improved hemodynamics and outcomes in patients undergoing long‐term CRRT for ≥ 7 days.
Akinori Yamaguchi, Atsuyoshi Mita, Kosuke Sonoda, Makoto Harada, Koji Hashimoto, Hiroshi Imamura, Yuji Kamijo   +6 more
wiley   +1 more source

Total Positivity Properties of LB-splines

, 1996
. A basic property of both polynomial and more general Tchebyche#an splines is that the associated B-spline collocation matrix has certain total positivity properties, and it is nonsingular if and only if well-known interlacing conditions hold.
Tom Lyche, Larry L. Schumaker
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Test positivity and age and sex distribution of total cases.

, 2018
Test positivity and age and sex distribution of total cases.
Devraj Sharma (5028716), Amita Jain (734503), Parul Jain (570119), Piyush K. Tripathi (5028713), Shikha Gupta (12971), Shantanu Prakash (5028710), Archana Chauhan (2302498), Umesh Sharma (5028707), Anil K. Jaiswal (1620715)   +8 more
core   +1 more source

Bases for shape preserving curves

Journal of Numerical Analysis and Approximation Theory, 2003
The shape preserving properties of a curve in \(\mathbb{R}^2\) depend on the properties of the function basis we use in its representation. Both sign consistent and totally positive bases have shape preserving properties useful in Computer Aided ...
Francesca Pitolli
doaj   +2 more sources

Generalizing Lusztig’s total positivity

Inventiones mathematicae
Abstract We introduce the notion of $\Theta $ Θ -positivity in real semisimple Lie groups. This notion at the same time generalizes Lusztig’s total positivity in split real Lie groups and invariant orders in Lie groups of Hermitian ...
Guichard, Olivier, Wienhard, Anna
openaire   +2 more sources

Control Sets and Total Positivity

Semigroup Forum, 2004
The goal of this paper is to connect two different mathematical subjects, namely totally positive matrices and control sets. The set \(T\) of totally positive matrices in \(Sl(d,\mathbb{R})\) (subgroup of determinant one matrices of size \(d \times d\)) is also a semigroup with non-empty interior in \(Sl(d,\mathbb{R})\).
Ayala, V, Kliemann, W, San Martin, LAB
openaire   +5 more sources