Search Results - "Tura, Fernando"
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A conjecture on the eigenvalues of threshold graphs
Published in Linear algebra and its applications (01-03-2021)“…Let An be the connected anti-regular graph of order n. It was conjectured that among all threshold graphs on n vertices, An has the smallest positive…”
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A linear algorithm for obtaining the Laplacian eigenvalues of a cograph
Published in Special matrices (06-09-2024)“…In this article, we give an time and space algorithm for obtaining the Laplacian eigenvalues of a cograph. This approach is more efficient as there is no need…”
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Laplacian eigenvalues of equivalent cographs
Published in Linear & multilinear algebra (13-04-2023)“…Let G and H be equivalent cographs with reductions and and suppose the vertices of and are labelled by the twin numbers of the k twin classes they represent…”
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Exponentially many graphs have a Q-cospectral mate
Published in Discrete mathematics (01-09-2017)“…We develop an algorithm for computing the characteristic polynomial of matrices related to threshold graphs. We use this as tool to exhibit, for any natural…”
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An explicit formula for the distance characteristic polynomial of threshold graphs
Published in Computational & applied mathematics (01-07-2023)“…A threshold graph G on n vertices is defined by a binary sequence of length n . In this paper, we present an explicit formula for computing the distance…”
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Assessment of risk of falls in elderly living at home
Published in Revista latino-americana de enfermagem (01-01-2017)“…to assess the risk of falls in elderly, by comparing the sociodemographic and cognitive factors, history of falls and self-reported comorbidities…”
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Social representations of older adults regarding quality of life
Published in Revista Brasileira de Enfermagem (01-07-2017)“…to identify the social representations of older adults regarding quality of life, and to analyze the care practices adopted to promote it. qualitative,…”
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The characteristic polynomial of generalized lollipop graphs
Published in Applied mathematics and computation (15-11-2018)“…A generalized lollipop graph is formed by connecting a tree and a threshold graph with an edge. Motivated by a sequence of algorithms that compute the…”
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Changes and events over life course: a comparative study between groups of older adults
Published in Revista latino-americana de enfermagem (01-01-2015)“…to identify the changes which had occurred over the last year in the life of older adults, as well as the values attributed to these changes. this is a…”
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10
cospectrality and -energy in cographs
Published in Linear & multilinear algebra (01-02-2018)“…The distance Laplacian matrix of a connected graph G is defined to be where denotes the distance matrix of G and diag(Tr) denotes the diagonal matrix of the…”
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Eigenvalues and energy in threshold graphs
Published in Linear algebra and its applications (15-01-2015)“…Assuming a uniform random model of selecting creation sequences, we show that almost every connected threshold graph has more negative than positive…”
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Eigenvalue location in threshold graphs
Published in Linear algebra and its applications (15-11-2013)“…Let G be a threshold graph of order n with adjacency matrix A. We present an O(n) algorithm for constructing a diagonal matrix congruent to Bx=A+xI for any x…”
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Competition in the arts of midwifery in the city of Rio de Janeiro from 1835 to 1900
Published in História, ciências, saúde--Manguinhos (01-10-2018)“…The article discusses competition between midwives and doctors offering birth-related services in the city of Rio de Janeiro from 1835 to 1900. The research…”
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14
Generating $I$-Eigenvalue Free Threshold Graphs
Published in The Electronic journal of combinatorics (19-05-2023)“…A graph is said to be $I$-eigenvalue free if it has no eigenvalues in the interval $I$ with respect to the adjacency matrix $A$. In this paper we present…”
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Social representations of adolescents about sexuality on the internet
Published in Revista da Escola de Enfermagem da U S P (2021)“…OBJECTIVETo apprehend the social representations of adolescents about sexuality on the internet. METHODQualitative research, based on the structural approach…”
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The Rio Health Gym Program: Daily life, leisure and health of older adults
Published in Revista brasileira de geriatria e gerontologia (2020)“…Abstract Objective: to identify the activities performed by older adults as part of the Rio Health Gym Program in their daily lives, and analyze the…”
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Computing the Characteristic Polynomial of Threshold Graphs
Published in Journal of graph algorithms and applications (2014)Get full text
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Modifiable risk factors related to osteoarthritis among older people / Fatores de riscos modificáveis relacionados a osteoartrite entre pessoas idosas
Published in Revista de pesquisa, cuidado é fundamental (26-08-2024)“…Objetivo: buscar evidências sobre os fatores de riscos modificáveis que estão relacionados ao desenvolvimento da osteoartrite de joelho e quadril, entre as…”
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From hepatic diseases and jaundice to viral hepatitis: the configuration of a kaleidoscope
Published in Revista de saúde pública (01-02-2013)“…Viral hepatitis A, B, C, D and E--systemic hepatotropic viral infections--present as acute hepatitis that, depending on the etiological agent, viral load and…”
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A concorrência na arte de partejar na cidade do Rio de Janeiro entre 1835 e 1900
Published in História, ciências, saúde--Manguinhos (01-12-2018)“…Resumo Este artigo discute a concorrência entre parteiras e médicos na oferta dos serviços de partos na cidade do Rio de Janeiro entre 1835 e 1900. Foram…”
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