Results 51 to 60 of about 169,695 (257)
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source
FEBS Letters, EarlyView.Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai +4 more
wiley +1 more source
U-Statistic for Multivariate Stable Distributions
Journal of Probability and Statistics, 2017 A U-statistic for the tail index of a multivariate stable random vector is given as an extension of the univariate case introduced by Fan (2006). Asymptotic normality and consistency of the proposed U-statistic for the tail index are proved theoretically.
Mahdi Teimouri +2 more
doaj +1 more source
ON TAIL INDEX ESTIMATION FOR DEPENDENT, HETEROGENEOUS DATA [PDF]
Econometric Theory, 2010 In this paper we analyze the asymptotic properties of the popular distribution tail index estimator by Hill (1975) for dependent, heterogeneous processes. We develop new extremal dependence measures that characterize a massive array of linear, nonlinear, and conditional volatility processes with long or short memory. We prove that the Hill estimator is
openaire +3 more sources
On tail index estimation based on multivariate data [PDF]
Journal of Nonparametric Statistics, 2015 This article is devoted to the study of tail index estimation based on i.i.d. multivariate observations, drawn from a standard heavy-tailed distribution, i.e. of which 1-d Pareto-like marginals share the same tail index. A multivariate Central Limit Theorem for a random vector, whose components correspond to (possibly dependent) Hill estimators of the ...
Clémençon, Stéphan, Dematteo, Antoine
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FEBS Letters, EarlyView.We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace +6 more
wiley +1 more source
Tail risk analysis of the S&P/OIC COMCEC 50 index
Borsa Istanbul Review, 2015 The S&P/OIC COMCEC 50 Sharia index is a joint index created by the organization of the Islamic conference (OIC) member states' stock exchanges forum and S&P indices. It is a Sharia-compliant benchmark of the 50 leading companies from OIC-members.
Mahmoud Bekri, Young Shin (Aaron) Kim
doaj +1 more source
Multivariate Tail Coefficients: Properties and Estimation
Entropy, 2020 Multivariate tail coefficients are an important tool when investigating dependencies between extreme events for different components of a random vector.
Irène Gijbels +2 more
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Tail posture and motion in relation to natural behaviour in juvenile and adult pigs
Animal, 2022 The tail of pigs has been suggested as a welfare indicator as it can provide insight into a pig’s behavioural and emotional states. Tail posture and motion have so far mainly been studied in the context of tail biting behaviour. The aim of this study was
P.M. Iglesias, I. Camerlink
doaj +1 more source
From mice to humans—divergent strategies for intestinal homeostasis and regeneration
FEBS Letters, EarlyView.Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa +2 more
wiley +1 more source