Results 11 to 20 of about 1,088,242 (267)
Frustrated generations in Russian history, XX–XXI c. [PDF]
Социологический журнал, 2014 The thesis touches upon the issue of first persons of the state authorities influence to the processes of Russian socium generation dynamics forming.
V. M. Pashinsky
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Journal of Translational Medicine, 2022 Background Many patients who recovered from COVID are still suffering from pulmonary dysfunction that can be persistent even for months after infection. Therefore, treatment to prevent irreversible impairment of lung function is needed. Treamid (bisamide
Evgeny Bazdyrev +7 more
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Orbital Reversibility of Planar Vector Fields
Mathematics, 2020 In this work we use the normal form theory to establish an algorithm to determine if a planar vector field is orbitally reversible. In previous works only algorithms to determine the reversibility and conjugate reversibility have been given.
Antonio Algaba +2 more
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Matroid and Knapsack Center Problems [PDF]
Algorithmica, 2013 In the classic $k$-center problem, we are given a metric graph, and the objective is to open $k$ nodes as centers such that the maximum distance from any vertex to its closest center is minimized. In this paper, we consider two important generalizations of $k$-center, the matroid center problem and the knapsack center problem.
Chen, Danny Z. +3 more
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Universal centers in the cubic trigonometric Abel equation
Electronic Journal of Qualitative Theory of Differential Equations, 2014 We study the center problem for the trigonometric Abel equation $d \rho/ d \theta= a_1 (\theta) \rho^2 + a_2(\theta) \rho^3,$ where $a_1(\theta)$ and $a_2(\theta)$ are cubic trigonometric polynomials in $\theta$.
Jaume Giné +2 more
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Generalized Center Problems with Outliers [PDF]
ACM Transactions on Algorithms, 2019 We study the ℱ-center problem with outliers: Given a metric space ( X , d ), a general down-closed family ℱ of subsets of X , and a parameter m , we need to locate a subset S ∈ ℱ of centers such that the maximum distance ...
Chakrabarty, Deeparnab +1 more
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Linearizability problem of persistent centers
Electronic Journal of Qualitative Theory of Differential Equations, 2018 The concepts of persistent and weakly persistent centers were introduced in 2009 and the same concept was applied in the study of some families of differential equations in 2013.
Matej Mencinger +3 more
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A note on the p - center problem [PDF]
Yugoslav Journal of Operations Research, 2011 The p - center problem is to locate p facilities in a network so as to minimize the longest distance between a demand point and its nearest facility. In this paper, we give a construction on a graph G which produces an infinite ascending chain G=G0≤G1≤
Jafari Rad Nader
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Talanta Open, 2023 In this work, we developed a portable multispectral fluorometer for determining formalin (FA). We used nitrogen-doped carbon dots (N-CDs) as the fluorescence probe, based on right-angle fluorescence spectrometry with twin excitation high-power light ...
Warut Singseeta +4 more
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BMC Medical Education, 2022 Background Career choice is a complex, multifaceted process affecting all aspects of life. Motivational factors of aspiring dentists are crucial to inform institutions and aid with the admission process. The aim of this study was to explore undergraduate
Alaa Daud +3 more
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