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Institution

Romanian Academy

ArchiveBucharest, Romania
About: Romanian Academy is a archive organization based out in Bucharest, Romania. It is known for research contribution in the topics: Population & Nonlinear system. The organization has 3662 authors who have published 10491 publications receiving 146447 citations. The organization is also known as: Academia Română & Societatea Literară Română.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors studied k-radially symmetric solutions corresponding to topological defects of charge for integer liquid crystals in the Landau-de-Gennes model describing liquid crystal in two-dimensional domains.
Abstract: We study k-radially symmetric solutions corresponding to topological defects of charge $$\frac{k}{2}$$ for integer $$k ot = 0$$ in the Landau-de Gennes model describing liquid crystals in two-dimensional domains. We show that the solutions whose radial profiles satisfy a natural sign invariance are stable when $$|k| = 1$$ (unlike the case $$|k| > 1$$ which we treated before). The proof crucially uses the monotonicity of the suitable components, obtained by making use of the cooperative character of the system. A uniqueness result for the radial profiles is also established.

42 citations

Journal ArticleDOI
Petre Caraiani1
TL;DR: In this paper, a correlation-based approach to analyze financial data from the US stock market, both daily and monthly observations from the Dow Jones, was used to compute the entropy based on the singular value decomposition of the correlation matrix.
Abstract: We use a correlation-based approach to analyze financial data from the US stock market, both daily and monthly observations from the Dow Jones. We compute the entropy based on the singular value decomposition of the correlation matrix for the components of the Dow Jones Industrial Index. Based on a moving window, we derive time varying measures of entropy for both daily and monthly data. We find that the entropy has a predictive ability with respect to stock market dynamics as indicated by the Granger causality tests.

42 citations

Journal ArticleDOI
TL;DR: In the present study, a method for the grape seed oil compositional characterisation using (1)H NMR spectroscopy directly applied on oils without sample derivatisation (as triglycerides) is developed.

42 citations

Journal ArticleDOI
TL;DR: This method is multi-parametric and can distinguish different populations of macrophages with reference to their erythrophagocytic potential and has broad applications from the initial step of contact to the subsequent cascade of time-dependent changes resulting from that signal transduction.
Abstract: A rapid, sensitive, and reproducible flow cytofluorimetric procedure is described for quantitation of erythrophagocytosis based on the use of red blood cells (RBCs) labeled with the fluorescent probe PKH-26. The procedure involves the following steps: i) incubation of PKH-26-labeled erythrocytes with macrophages, ii) removal of un-bound red blood cells, iii) lysis of membrane-bound RBCs, and iv) measurement of extent of phagocytosis by direct flow-cytometric analysis of intact macrophages. Each step was controlled by fluorescence microscopy. Use of fluorescent, instead of radio-labeled RBCs, makes the method more sensitive, rapid, and avoids radioactive hazards. Furthermore, this approach is multi-parametric and can distinguish different populations of macrophages with reference to their erythrophagocytic potential. This technology moreover, has broad applications from the initial step of contact (between effector and target cells to study the specific receptor mediated attachment) to the subsequent cascade of time-dependent changes resulting from that signal transduction.

42 citations

Journal ArticleDOI
TL;DR: For the recently introduced isotropic-relaxed micromorphic generalized continuum model, it is shown that, under the assumption of positive-definite energy, planar harmonic waves have real velocity and a necessary and sufficient condition for real wave velocity which is weaker than the positive definiteness of the energy is obtained.
Abstract: 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. We also obtain a necessary and sufficient condition for real wave velocity which is weaker than positive-definiteness of the energy. Connections to isotropic linear elasticity and micropolar elasticity are established. Notably, we show that strong ellipticity does not imply real wave velocity in micropolar elasticity, while it does in isotropic linear elasticity.

42 citations


Authors

Showing all 3740 results

NameH-indexPapersCitations
Cristina Popescu7428518434
Adrian Covic7357017379
Gheorghe Paun6539918513
Floriana Tuna6027111968
Arto Salomaa5637417706
Jan A. Bergstra5561613436
Alexandru T. Balaban5360514225
Cristian Sminchisescu5317312268
Maya Simionescu4719210608
Marius Andruh462398431
Werner Scheid465189186
Vicenţiu D. Rădulescu463607771
Cornelia Vasile442977108
Irinel Popescu444018448
Mihail Barboiu442395789
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202335
2022113
2021671
2020690
2019704
2018630