Filters








102,829 Hits in 4.6 sec

Differentiable positive definite functions on two-point homogeneous spaces [article]

V. S. Barbosa, V. A. Menegatto
2015 arXiv   pre-print
The main issue here is to obtain a similar result for all the other compact two point homogeneous spaces.  ...  Ziegel showed in 2013 that the radial part of a continuous positive definite and zonal kernel is continuously differentiable up to order (d-1)/2 in the interior of its domain.  ...  Moreover, if both series ∞ k=0 a α,β k and ∞ n=0 |a α+1,β+1 12, . . .; (v) P d (R) ֒→ P 2d (C), d = 2, 3, . . .; (vi) P 2d (C) ֒→ P 4d (H), d = 2, 3, . . .; (vii) P 8 (H) ֒→ P 16 (Cay).  ... 
arXiv:1505.00029v1 fatcat:hqt2vsabmfas7iehsk4zrgbwom

Strict positive definiteness on a product of compact two-point homogeneous spaces [article]

V. S. Barbosa, V. A. Menegatto
2016 arXiv   pre-print
of the spaces is a sphere of dimension greater than 1 and the other is not a circle.  ...  We present an explicit characterization for the real, continuous, isotropic and strictly positive definite kernels on a product of compact two-point homogeneous spaces, in the cases in which at least one  ...  In particular, z 2 z 1 F (a, b; c; z)dz = c − 1 (a − 1)(b − 1) [F (a − 1, b − 1; c − 1; z 2 ) − F (a − 1, b − 1; c − 1; z 1 )] .  ... 
arXiv:1605.07071v1 fatcat:pxu4y5crmbe6japtoev2kqj7n4

Rediscovery of Chiococca insularis (Ridley) C.M.Taylor & M.R.V. Barbosa (Rubiaceae), a species presumed extinct, on the island of Fernando de Noronha, Pernambuco, Brazil

Maurício Figueira, Bianca Schindler, Jomar G. Jardim, Maria Regina de V. Barbosa
2020 Check List  
A full description of the species, with previously unseen or unmeasured characters, habitat information and photographs of the plant and environment are provided.  ...  Chiococca insularis (Ridley) C.M.Taylor & M.R.V.Barbosa (Rubiaceae) was described by Henry Nicholas Ridley in 1890, based on a collection he made on the island of Fernando de Noronha (Pernambuco, Brazil  ...  Acknowledgements For this opportunity, MF and BS are grateful to Joberto V. Freitas, Claudia M.M. Rosa, Gustavo S.C. Pinho, and Tiago T.  ... 
doi:10.15560/16.5.1407 fatcat:5yk3nsuin5gehc6op5ev4pceha

A Gneiting-like method for constructing positive definite functions on metric spaces [article]

V. S. Barbosa, V. A. Menegatto
2020 arXiv   pre-print
The results we prove are aligned with a well-established method of T. Gneiting to construct space-time positive definite functions and its many extensions.  ...  This paper is concerned with the construction of positive definite functions on a cartesian product of quasi-metric spaces using generalized Stieltjes and complete Bernstein functions.  ...  Theorem 2.2 shows that(u, v) ∈ [0, ∞) × D τ Z → f 1 (u 2 /h(v))is a positive valued function in CND(Y × Z, σ, τ ).  ... 
arXiv:2006.12217v1 fatcat:ceq545utmfbmbc6ienpz5ogus4

Content distribution in trail-aware environments

Jader M. Silva, João H. Rosa, Jorge L. V. Barbosa, Débora N. F. Barbosa, Luiz A. M. Palazzo
2010 Journal of the Brazilian Computer Society  
A trail is the history of the contexts visited by a user during a period. This article proposes a model for trails management and its application in the content management.  ...  The text presents a prototype and its application in an educational environment for distribution of learning objects using trail-aware.  ...  Homepage of the Programming Techniques discipline http://www.inf. unisinos.br/~barbosa/grefe/pa2.htm.  ... 
doi:10.1007/s13173-010-0015-1 fatcat:l66ag23jgzgtxpz4vae7pumslq

WALTER BENJAMIN E A INFÂNCIA COMO REMEMORAÇÃO

Idenilza Barbosa Lima de Lima
2015 CADERNOS WALTER BENJAMIN  
A hipótese é de que a criança encontra-se na cidade, mas à margem desta, porque suas observações quase todas são silenciadas pelo modo de vida dos adultos.  ...  O filósofo apresenta a criança como observador das ruas da metrópole em um percurso de aventuras e descobertas até à proteção que recebe dos adultos em casa.  ...  II (1987 e, Reflexões: a criança, o brinquedo, a Idenilza Barbosa Lima de Lima -Doutoranda em Psicologia Social pela Universidade J.  ... 
doi:10.17648/2175-1293-v14n2015-2 fatcat:yy3kyzkc35dlxnpu2qz5p4gdqm

INFECÇÃO POR NEOSPORA CANINUM EM BOVINOS COM ALTO ÍNDICE DE ABORTAMENTO EM BARBOSA, SÃO PAULO / Neospora caninum INFECTION IN CATTLE WITH HIGH ABORTION RATES IN BARBOSA, SÃO PAULO

L. V. S. MATOS, W. F. P. TEIXEIRA, B. C. M. OLIVEIRA, M. A. VIOL, C. N. KANETO, K. D. S. BRESCIANI
2013 Ars Veterinaria  
Diagnosticar a infecção por esse protozoário em vacas leiteiras com alto índice de abortamento em Barbosa, São Paulo, foi o objetivo deste estudo.  ...  Com a alta ocorrência sorológica diagnosticada para N. caninum, somada à negatividade dos outros agentes previamente pesquisados (Brucella abortus e Leptospira spp) ficou atribuído a este coccídeo a possível  ...  INFECÇÃO POR NEOSPORA CANINUM EM BOVINOS COM ALTO ÍNDICE DE ABORTAMENTO EM BARBOSA, SÃO PAULO (NEOSPORA CANINUM INFECTION IN CATTLE WITH HIGH INDEX OF ABORTION IN BARBOSA, SÃO PAULO) L. V. S.  ... 
doi:10.15361/2175-0106.2013v29n4p55 fatcat:gpswue265zhpjnq5rlwkun7z2a

Strictly positive definite kernels on two-point compact homogeneous spaces [article]

V. S. Barbosa, V. A. Menegatto
2015 arXiv   pre-print
We present a necessary and sufficient condition for the strict positive definiteness of a real, continuous, isotropic and positive definite kernel on a two-point compact homogeneous space.  ...  As an application, we use the characterization to improve upon a recent result on the differentiability of positive definite kernels on the spaces.  ...  d−2 ; (ii) M d = P d (R): d ≥ 3 and M = P d−2 (R); (iii) M d = P d (C): d ≥ 4 and M = P d−2 (C); (iv) M d = P d (H): d ≥ 8, M = P d/2−2 (C), when d ∈ 8Z + + 8 and M = P d/2 (C), when d ∈ 8Z + + 12; (v)  ... 
arXiv:1505.00591v2 fatcat:24h7t54uljdj3lrfgzbnroctbi

A Neural Marker of Perceptual Consciousness in Infants

S. Kouider, C. Stahlhut, S. V. Gelskov, L. S. Barbosa, M. Dutat, V. de Gardelle, A. Christophe, S. Dehaene, G. Dehaene-Lambertz
2013 Science  
Carrelli for technical assistance; A. Fire for C. elegans vectors; and V. Cleghon for critical reading of the manuscript. This work was funded by grants from the Whitehall Foundation (C.C. and  ...  Table S1 S1 References (20-23) 10 October 2012; accepted 8 March 2013 10.1126/science.1231321 A Neural Marker of Perceptual Consciousness in Infants Sid Kouider, 1,2 * Carsten Stahlhut, 2 Sofie V.  ...  Barbosa, 1 Michel Dutat, 1 Vincent de Gardelle, 1 Anne Christophe, 1 Stanislas Dehaene, 4,5,6,7 Ghislaine Dehaene-Lambertz 5,6,7 Laboratoire de Sciences Cognitives et Psycholinguistique, EHESS/CNRS/ENS-DEC  ... 
doi:10.1126/science.1232509 pmid:23599498 fatcat:ptcdh6ri6rg67jcue2now4lazy

A família Rubiaceae Juss. no Cariri Paraibano

Maria do Céo Rodrigues Pessoa, Maria Regina de V. Barbosa
2012 Rodriguésia  
O Cariri Paraibano, situado numa depressão do Planalto da Borborema na Paraíba, é considerado uma das áreas prioritárias para a conservação da Caatinga.  ...  O presente trabalho teve como objetivo realizar o levantamento e caracterização das espécies de Rubiaceae presentes no Cariri Paraibano, visando contribuir com a taxonomia da família e com os estudos florísticos  ...  Na Paraíba, a família Rubiaceae foi estudada por Barbosa (1995 Barbosa ( , 1997 , Pereira (1996) , Pereira & Barbosa (2004 e Melo & Barbosa (2007) , principalmente em áreas de Mata Atlântica.  ... 
doi:10.1590/s2175-78602012000400017 fatcat:6jfxt447vfanhgefoity7tw5ge

A Decade of Advances in Iridovirus Research [chapter]

Trevor Williams, Valérie Barbosa‐Solomieu, V. Gregory Chinchar
2005 Advances in Virus Research  
responses against iridoviruses (V.  ...  Recent studies aiming at establishing a PCR protocol for the detection of oyster iridoviruses focused on conserved sequences from vertebrate and insect iridoviruses ( Barbosa-Solomieu, 2004) .  ... 
doi:10.1016/s0065-3527(05)65006-3 pmid:16387197 fatcat:23dnn3hhkjbgzettl3w5gfek4u

Is HSPG2 a modifier gene for Marfan syndrome? [article]

Isabela Gerdes Gyuricza, Rodrigo Barbosa de Souza, Luis Ernesto Farinha-Arcieri, Gustavo Ribeiro Fernandes, Lygia V. Pereira
2019 bioRxiv   pre-print
ABSTRACTMarfan syndrome (MFS) is a connective tissue disease caused by mutations in the FBN1 gene.  ...  Here we investigate the HSPG2 gene, located in this region, as a candidate modifier gene for MFS.  ...  Previous works had suggested that variations on FBN1 expression caused by polymorphisms in the gene could play a role as a modifier of disease severity (4, 5) .  ... 
doi:10.1101/849133 fatcat:rm7xkhrpwnagpb73r6sl5lqc5y

Bahianite, Sb3Al5O14(OH)2, a new species

Paul B. Moore, Carlos do Prado Barbosa, Richard V. Gaines
1978 Mineralogical magazine  
Bahianite, Sb3Al5O14(OH)2-Sb3Al5(Al, Be, Si)<2O16, monoclinic, a 9·406(6), b 11·541(8), c 4·410(3) Å, β 90·94(3)°, Z = 2, space group C2/m, is a new species from the Paramirim region, south central  ...  Specific gravity ranges from 4·89 to 5·46 (5·26 g cm−3 for Sb3Al5O14(OH)2); hardness 9, cleavage {100} perfect, lustre adamantine, biaxial (−), 2V large, α = 1·81, β = 1·87, γ = 1·92, dispersion r > v.  ...  Cations per cell based on (6), specific gravity = 5"46 and V = 487"66 A 3. H was not included in the sum. I 2 3 4 5 6 7 SbzO5 (55'35) 56"7 ~ 57"86 n.d.  ... 
doi:10.1180/minmag.1978.042.322.02 fatcat:4x7pwual6fd5hl2wtzbv543dmi

CFD Analysis of Different Aeration Ducts on Temperature and Airflow in Stored Maize

Marcos E. V. Araujo, Eloiny G. Barbosa, Marcio A. Martins, Paulo C. Corrêa, Elisa G. Barbosa, Rodrigo S. L. Araújo, Felipe A. Gomes
2019 Journal of Agricultural Science  
The ducts of a square and a ring shape showed better distributions of airflow in the grain mass, with averages of 0.00236 m s-1 and 0.00275 m s-1, respectively.  ...  Thus, this study aimed model and evaluate the temperature and airflow distribution in a maize mass, stored in a metal silo with different geometries of aeration ducts, using CFD (computational fluid dynamic  ...  A square-shape nded for aeratio atures recorded and their shap ulated temperat for single bar, The values fou a-Rodriguez e g temperature v dict temperatur moted higher t mended for aer  ... 
doi:10.5539/jas.v11n2p301 fatcat:xbghl3xdefevxcz4lz4tt6rlue

The silicon photomultipliers in the detector subsystems of the GlueX experiment

A Somov, F Barbosa, I Tolstukhin, S V Somov, V V Berdnikov
2017 Journal of Physics, Conference Series  
The photon beam is produced using a bremsstrahlung technique by a 12 GeV electron beam incident on a thin (20 µm) diamond radiator.  ...  Measurements were performed using a laser with a pulse width of 70 ps. The response from scintillator was simulated using a fast blue light emitting diode (LED).  ... 
doi:10.1088/1742-6596/798/1/012223 fatcat:z4rhnixeyvhdlkcf4m3knmb4tm
« Previous Showing results 1 — 15 out of 102,829 results