Results 71 to 80 of about 3,753,934 (302)

Reward responsivity and the development of nicotine dependence

open access: yes, 2008
Different theories have been proposed to explain the development of nicotine dependence. Some theories suggest that nicotine has direct reinforcing properties, either positive or negative.
Kalamboka, Natasha
core   +1 more source

Ordinal pattern dependence and multivariate measures of dependence

open access: yesJournal of Multivariate Analysis
Ordinal pattern dependence has been introduced in order to capture co-monotonic behavior between two time series. This concept has several features one would intuitively demand from a dependence measure. It was believed that ordinal pattern dependence satisfies the axioms which Grothe et al. (Journal of Multivariate Analysis 123, 2014) proclaimed for a
Angelika Silbernagel, Alexander Schnurr
openaire   +2 more sources

Measures of Multivariate Association and Dependence

open access: yes, 2004
A pseudo-distance between covariance matrices is used in order to define a class of measures of multivariate association and dependence between the components of a random vector. Some basic properties are proved for this class of measures and their performance is illustrated by example.
Zografos, Konstantinos, Batsidis, A.
openaire   +2 more sources

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

open access: yesFEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz   +11 more
wiley   +1 more source

On the tail dependence in bivariate hydrological frequency analysis

open access: yesDependence Modeling, 2015
In Bivariate Frequency Analysis (BFA) of hydrological events, the study and quantification of the dependence between several variables of interest is commonly carried out through Pearson’s correlation (r), Kendall’s tau (τ) or Spearman’s rho (ρ).
Lekina Alexandre   +2 more
doaj   +1 more source

An isoform of 14‐3‐3 protein regulates transbilayer lipid movement at the plasma membrane

open access: yesFEBS Letters, EarlyView.
Loss of 14‐3‐3ζ in CHO cells confers resistance to exogenous phosphatidylserine (PS) and impairs endocytosis‐independent inward flip‐flop of fluorescent PS at the plasma membrane. RNAi‐mediated knockdown reproduces this defect, while no additive effect is seen in ATP11C‐deficient cells.
Akiko Yamaji‐Hasegawa   +3 more
wiley   +1 more source

Threshold copulas and positive dependence [PDF]

open access: yes, 2008
Starting with a notion of positive dependence View the MathML source and with the family of the lower threshold copulas Ct associated with a bivariate distribution having copula C, we define different notions of positive dependence for C, reflecting the ...
Fabio Spizzichino   +5 more
core   +1 more source

Directional dependence between major cities in China based on copula regression on air pollution measurements.

open access: yesPLoS ONE, 2019
Air pollution is well-known as a major risk to public health, causing various diseases including pulmonary and cardiovascular diseases. As social concern increases, the amount of air pollution data is increasing rapidly.
Jong-Min Kim, Namgil Lee, Xingyao Xiao
doaj   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

open access: yesFEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Negative consequences associated with dependence in daily cannabis users

open access: yesSubstance Abuse Treatment, Prevention, and Policy, 2007
Background Cannabis is the most widely consumed illicit substance in America, with increasing rates of use. Some theorists tend to link frequency of use with cannabis dependence.
Earleywine Mitch, Looby Alison
doaj   +1 more source

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