Results 101 to 110 of about 14,776 (204)

Lithium evolution in intermediate age and old open clusters: NGC 752 revisited

open access: yes, 2004
We present new high resolution spectroscopic observations of the intermediate age (~2 Gyr) open cluster NGC 752. We investigate the Li vs. Teff distribution and we obtain a new accurate determination of the cluster metallicity. We compare the results for
Balachandran   +42 more
core   +1 more source

Caracter��sticas epidemiol��gicas dos casos de Zika V��rus do estado do Piau��

open access: yes, 2021
O presente estudo tem como objetivo descrever as caracter sticas epidemiol gicas dos casos de Zika V rus do estado do Piau (2015-2020). Trata -se de um delineamento transversal quantitativo e descritivo. Os dados foram extra dos da plataforma DATASUS, tendo como vari veis inclusas: idade gestacional, sexo, faixa et ria, cidade de notifica o ...
Da Silva Miranda, Camila Cristina   +19 more
openaire   +1 more source

Spatio-temporal distribution of mortality among motorcyclists: an ecological study / Distribuição espaço-temporal da mortalidade entre motociclistas: um estudo ecológico

open access: yesRevista de Pesquisa Cuidado é Fundamental Online
Objetivo: analisar a distribuição espacial e temporal da mortalidade por acidentes motociclísticos no Piauí de 2011 a 2021. Método: trata-se de um estudo ecológico, em que foram analisados os óbitos por acidentes motociclísticos ocorridos no estado do ...
Ilan de Araujo Carneiro   +3 more
doaj  

Simulation of majority rule disturbed by power-law noise on directed and undirected Barabasi-Albert networks

open access: yes, 2008
On directed and undirected Barabasi-Albert networks the Ising model with spin S=1/2 in the presence of a kind of noise is now studied through Monte Carlo simulations.
Aleksiejuk A.   +2 more
core   +2 more sources

Space-temporal dynamics and factors associated with newborn mortality / Dinâmica espaço-temporal e fatores associados à mortalidade neonatal

open access: yesRevista de Pesquisa Cuidado é Fundamental Online
Objetivo: analisar a distribuição espacial e temporal da mortalidade neonatal e fatores associados no Piauí de 2007 a 2017. Método: foi utilizado o método Joinpoint, estatística bayesiana e a técnica de varredura Scan.
Jessica Cristina Moraes de Araújo   +5 more
doaj  

Effects of granulation on the visibility of solar oscillations

open access: yes, 2015
Context. The interaction of solar oscillations with near surface convection is poorly understood. These interactions are likely the cause of several problems in helio- and astero-seismology, including the so-called surface effect and apparently ...
Schou, J.
core   +1 more source

Majority-vote model on triangular, honeycomb and Kagome lattices

open access: yes, 2010
On Archimedean lattices, the Ising model exhibits spontaneous ordering. Three examples of these lattices of the majority-vote model with noise are considered and studied through extensive Monte Carlo simulations.
Lima, F. W. S.   +2 more
core   +1 more source

Stellar Hydrodynamics in Radiative Regions

open access: yes, 2003
We present an analysis of the response of a radiative region to waves generated by a convective region of the star; this wave treatment of the classical problem of ``overshooting'' gives extra mixing relative to the treatment traditionally used in ...
Blocker T.   +13 more
core   +2 more sources

ASPECTOS REPRODUTIVOS DE Leporinus piau FOWLER, 1941 (OSTEICHTHYES, ANOSTOMIDAE) DA BACIA DO RIO SÃO FRANCISCO, SUBMETIDO À DESOVA INDUZIDA REPRODUCTIVE PARAMETERS OF THE LEPORINUS PIAU FOWLER, 1941 (Osteichthyes, Anostomidae) FROM THE SÃO FRANCISCO RIVER BASIN, SUBMITTED TO INDUCED SPAWNING.

open access: yesCiência Animal Brasileira, 2009
Leporinus piau Fowler, 1941, é importante como peixe forrageiro e na pesca da bacia do São Francisco. Fêmeas dessa espécie foram submetidas à desova induzida, mediante a aplicação de duas doses de extrato bruto de hipófise de carpa-comum (EBHC) (0,5 e 5 ...
Edson Vieira Sampaio, Yoshimi Sato
doaj  

Swimming performance of the migratory Neotropical fish Leporinus reinhardti (Characiformes: Anostomidae)

open access: yesNeotropical Ichthyology
The fishways built in Latin America were mainly based on those used in the northern hemisphere for passing salmonids upstream. However, the swimming capacity in terms of speed and endurance is a major factor concerning the design of a fishway, and this ...
Hersília de Andrade e Santos   +2 more
doaj   +1 more source

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