Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Constantin Popa"'
Autor:
Corneliu Toader, Nicolaie Dobrin, Felix-Mircea Brehar, Constantin Popa, Razvan-Adrian Covache-Busuioc, Luca Andrei Glavan, Horia Petre Costin, Bogdan-Gabriel Bratu, Antonio Daniel Corlatescu, Andrei Adrian Popa, Alexandru Vlad Ciurea
Publikováno v:
International Journal of Molecular Sciences, Vol 24, Iss 22, p 16119 (2023)
With the inexorable aging of the global populace, neurodegenerative diseases (NDs) like Alzheimer’s disease (AD), Parkinson’s disease (PD), and amyotrophic lateral sclerosis (ALS) pose escalating challenges, which are underscored by their socioec
Externí odkaz:
https://doaj.org/article/f9b60744e2c04a7d8d701817d9677c56
Publikováno v:
Journal of Applied and Computational Mechanics, Vol 6, Iss Special Issue, Pp 1380-1393 (2020)
Based on the data gained from a full-scale experiment, the order/disorder characteristics of the compartment fire temperatures are analyzed. Among the known permutation/encoding type entropies used to analyze time series, we look for those that fit b
Externí odkaz:
https://doaj.org/article/ea30fe8628234f81b01eb17fe40bc832
Publikováno v:
Romanian Journal of Neurology, Vol 17, Iss 2, Pp 57-60 (2018)
Our objective has been a review of the recent data available in reference to the split hand clinical sign in amyotrophic lateral sclerosis (ALS) and its novel electrophysiological counterpart the split hand index (SHI). We have conducted an extensive
Externí odkaz:
https://doaj.org/article/d871c89f39ca4e88b1637d56c0c7b598
Publikováno v:
Romanian Journal of Neurology, Vol 16, Iss 1, Pp 15-20 (2017)
Purpose: the analysis of the paraclinical features of heart changes in the acute ischemic stroke, especially electrocardiographic (ECG) abnormalities. Material and methods. We performed a prospective study on 23 patients admitted in our stroke unit
Externí odkaz:
https://doaj.org/article/99e262226a4a4ecc92f40c0908222625
Publikováno v:
Archives of Transport, Vol 37, Iss 1, Pp 7-13 (2016)
The transportation problem, as a particular case of a linear programme, has probably the highest relative frequency with which appears in applications. At least in its classical formulation, it involves demands and supplies. When, for practical reaso
Externí odkaz:
https://doaj.org/article/774e2b65d07c42518848d77c7ab71b71
Autor:
Gheorghe JUNCU, Constantin POPA
Publikováno v:
INCAS Bulletin, Vol 7, Iss 4, Pp 95-101 (2015)
For the flow past an impervious cylinder embedded in a fluid saturated porous medium only the linear (Darcy and Darcy - Brinkman) models were used. In this work, the flow past an impermeable cylinder embedded in a fluid saturated porous medium was st
Externí odkaz:
https://doaj.org/article/6db878b29f2d4ff8a63e9366009abcc1
Publikováno v:
Romanian Journal of Neurology, Vol 12, Iss 4, Pp 202-205 (2013)
Introduction. Hypertensive cerebral hemorrhage remains a severe disease with a high mortality. Current therapeutic options (including surgery) are limited, therefore prognostic elements are important in selecting patients for the testing of more aggr
Externí odkaz:
https://doaj.org/article/a7634f03727c4ddcb98fc88667ed8030
Autor:
Aurelian Nicola, Constantin Popa
Publikováno v:
Journal of Numerical Analysis and Approximation Theory, Vol 37, Iss 2 (2008)
In this paper we consider a preconditioning technique for the ill-conditioned systems arising from discretisations of nonsymmetric elliptic boundary value problems. The rectangular preconditioning matrix is constructed via the transfer operators betw
Externí odkaz:
https://doaj.org/article/c06df29cebc14cd4aa592d00f57c290c
Autor:
Constantin Popa
Publikováno v:
Journal of Numerical Analysis and Approximation Theory, Vol 36, Iss 1 (2007)
Z. Kovarik proposed in 1970 a method for approximate orthogonalization of a finite set of linearly independent vectors from a Hilbert space. This method uses at each iteration a symmetric and positive definite matrix inversion. In this paper we descr
Externí odkaz:
https://doaj.org/article/a70b8d5f7696476dbaf3710421e366fe
Autor:
Constantin Popa
Publikováno v:
Journal of Numerical Analysis and Approximation Theory, Vol 32, Iss 1 (2003)
Starting from an extension of Kaczmarz's method, obtained by us in a previous paper, we introduce new directions for projections. We prove that by this, we don't modify the set of limit points of the original extended Kaczmarz algorithm. For the clas
Externí odkaz:
https://doaj.org/article/ccdc6cef40a149f595d773257b285386