Results 81 to 90 of about 1,090,945 (335)
Distinct hippocampal engrams control extinction and relapse of fear memory
Nature Neuroscience, 2019 Learned fear often relapses after extinction, suggesting that extinction training generates a new memory that coexists with the original fear memory; however, the mechanisms governing the expression of competing fear and extinction memories remain ...
A. Lacagnina +9 more
semanticscholar +1 more source
Critical Domain Problem for the Reaction–Telegraph Equation Model of Population Dynamics
Mathematics, 2018 A telegraph equation is believed to be an appropriate model of population dynamics as it accounts for the directional persistence of individual animal movement.
Weam Alharbi, Sergei Petrovskii
doaj +1 more source
Advanced Functional Materials, EarlyView.This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous
Mingfeng Xu +5 more
wiley +1 more source
Reddening Behaviors of Galaxies in the SDSS Photometric System
, 2008 We analyze the behaviors of reddening vectors in the SDSS photometric system for galaxies of different morphologies, ages, and redshifts. As seen in other photometric systems, the dependence of reddening on the spectral energy distribution (SED) and the ...
Grebel E. K. +2 more
core +1 more source
Mid-Infrared Extinction and its Variation with Galactic Longitude [PDF]
, 2009 Based on the data obtained from the Spitzer/GLIPMSE Legacy Program and the 2MASS project, we derive the extinction in the four IRAC bands, [3.6], [4.5], [5.8] and [8.0] micron, relative to the 2MASS Ks band (at 2.16 micron) for 131 GLIPMSE fields along ...
Aigen Li +42 more
core +2 more sources
Science, 2018 Drivers of the “Great Dying” Though our current extinction crisis is substantial, it pales in comparison to the largest extinction in Earth's history, which occurred at the end of the Permian Period.
J. Penn +3 more
semanticscholar +1 more source
Nitrogen Pollution and the Meltdown of Urban Ecosystems
Land, 2016 Urban ecosystems are carrying an extinction debt. Mitigating this debt will require the development of a predictive framework that improves our understanding of the factors causing decline of native biodiversity in urban areas. I argue that nitrogen is a
Brenton Ladd
doaj +1 more source
Journal of Biological Dynamics, 2020 In this paper, we first investigate a stochastic two-predators one-prey model with Lévy noise and distributed delays. The global dynamical behaviour is discussed.
Nafeisha Tuerxun +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Phosphorescent OLEDs suffer from efficiency roll‐off due to triplet‐polaron quenching (TPQ). This study demonstrates for a large set of host‐guest combinations a spectroelectrochemical method to measure the absorption of charged molecules, enabling determining TPQ Förster radii (2.5–4 nm) from the spectral overlap.
Stan E. A. Jaspars +5 more
wiley +1 more source
Extinction rates of established spatial populations
, 2011 This paper deals with extinction of an isolated population caused by intrinsic noise. We model the population dynamics in a "refuge" as a Markov process which involves births and deaths on discrete lattice sites and random migrations between neighboring ...
A. S. Mikhailov +8 more
core +1 more source