Results 11 to 20 of about 2,359,967 (297)

Larval condition and growth of Sardinella brasiliensis (Steindachner, 1879): preliminary results from laboratory studies [PDF]

open access: yesScientia Marina, 2003
Brazilian sardine, the most important resource along the southeastern Brazilian coast, presented great variations and declines in its stocks. The main factors contributing to this are: oceanographic structure changes; recruitment failures; excessive ...
Carmen Lúcia del Bianco Rossi-Wongtschow   +3 more
doaj   +3 more sources

Time-Inhomogeneous Jump Processes and Variable Order Operators [PDF]

open access: yes, 2015
In this paper we introduce non-decreasing jump processes with independent and time non-homogeneous increments. Although they are not Lévy processes, they somehow generalize subordinators in the sense that their Laplace exponents are possibly different ...
E. Orsingher   +2 more
semanticscholar   +3 more sources

Split invariance principles for stationary processes. [PDF]

open access: yes, 2011
The results of Komlos, Major and Tusnady give optimal Wiener approximation of partial sums of i.i.d. random variables and provide an extremely powerful tool in probability and statistical inference. Recently Wu [Ann. Probab. 35 (2007) 2294–2320] obtained
I. Berkes   +2 more
semanticscholar   +3 more sources

Parametric estimation of the driving Lévy process of multivariate CARMA processes from discrete observations [PDF]

open access: yes2013, Journal of Multivariate Analysis, 115, pp 217-251, 2012
We consider the parametric estimation of the driving L\'evy process of a multivariate continuous-time autoregressive moving average (MCARMA) process, which is observed on the discrete time grid $(0,h,2h,...)$. Beginning with a new state space representation, we develop a method to recover the driving L\'evy process exactly from a continuous record of ...
Apostol   +44 more
arxiv   +3 more sources

Plasticity in the rat prefrontal cortex: linking gene expression and an operant learning with a computational theory. [PDF]

open access: yesPLoS ONE, 2010
The plasticity in the medial Prefrontal Cortex (mPFC) of rodents or lateral prefrontal cortex in non human primates (lPFC), plays a key role neural circuits involved in learning and memory.
Maximiliano Rapanelli   +3 more
doaj   +1 more source

Size‐Dependent Photon Avalanching in Tm3+ Doped LiYF4 Nano, Micro, and Bulk Crystals

open access: yesAdvanced Optical Materials, 2022
Photon avalanche (PA) is a highly nonlinear mode of upconversion that is characterized by 100–1000‐fold increase in luminescence intensity upon minute increments of pumping power.
Magdalena Dudek   +13 more
semanticscholar   +1 more source

TRP, TRPL and cacophony channels mediate Ca2+ influx and exocytosis in photoreceptors axons in Drosophila. [PDF]

open access: yesPLoS ONE, 2012
In Drosophila photoreceptors Ca(2+)-permeable channels TRP and TRPL are the targets of phototransduction, occurring in photosensitive microvilli and mediated by a phospholipase C (PLC) pathway. Using a novel Drosophila brain slice preparation, we studied
Guadalupe Astorga   +3 more
doaj   +1 more source

Rock property modelling and sensitivity analysis for hydrocarbon exploration in OSSY field, Niger Delta Basin

open access: yesJournal of Petroleum Exploration and Production Technology, 2021
The application of quantitative interpretation techniques for hydrocarbon prospect evaluation from seismic has become so vital. The effective employment of these techniques is dependent on several factors: the quality of the seismic and well data ...
Alexander Ogbamikhumi   +1 more
doaj   +1 more source

Stochastic SIR Lévy Jump Model with Heavy-Tailed Increments [PDF]

open access: yesJournal of nonlinear science, 2019
This paper considers a general stochastic SIR epidemic model driven by a multidimensional Lévy jump process with heavy-tailed increments and possible correlation between noise components. In this framework, we derive new sufficient conditions for disease
Nicolas Privault, Liang Wang
semanticscholar   +1 more source

Asymptotic behavior of the quadratic variation of the sum of two Hermite processes of consecutive orders [PDF]

open access: yes, 2014
Hermite processes are self--similar processes with stationary increments which appear as limits of normalized sums of random variables with long range dependence.
Clausel, Marianne   +3 more
core   +4 more sources

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