Results 61 to 70 of about 1,991,503 (333)

Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells

open access: yesAdvanced Materials, EarlyView.
Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang   +14 more
wiley   +1 more source

Most Probable Dynamics of the Single-Species with Allee Effect under Jump-Diffusion Noise

open access: yesMathematics
We explore the most probable phase portrait (MPPP) of a stochastic single-species model incorporating the Allee effect by utilizing the nonlocal Fokker–Planck equation (FPE). This stochastic model incorporates both non-Gaussian and Gaussian noise sources.
Almaz T. Abebe   +3 more
doaj   +1 more source

Influence of CRISPR-Cas probability of spacer acquisition on the probability of phage extinction in the absence of autoimmunity.

open access: yes, 2022
A) Probability of phage survival when infecting bacteria with different acquisition probabilities. The different colours correspond to different levels of phage evolution (μ): black, no evolution (Type III CRISPR-Cas systems, μ = 0), purple (μ = 10−8 ...
Roland R. Regoes (8354265)   +3 more
core   +1 more source

Linker‐Engineered Dimeric Acceptors Afford Efficient Organic Photocatalytic Hydrogen Evolution via Tailored Nanomorphology for Long‐Lived Charge Accumulation

open access: yesAdvanced Materials, EarlyView.
We developed a new series of monomeric (MY) and dimeric acceptors incorporating unfused (DY1) and fused (DY2) linkers, which establish a controlled self‐aggregation trend of MY > DY2 > DY1. The DY2‐based system yields a bulk‐heterojunction nanoparticle morphology that appears to balance phase separation and interfacial accessibility, consistent with ...
Jin‐Woo Lee   +11 more
wiley   +1 more source

Probability of extinction by simulation scenario.

open access: yes, 2012
The cumulative probability of extinction during a 50-yr period (i.e., probability that the population falls below one female) across 24 simulation scenarios depending on whether and how density dependence, immigration, demographic stochasticity, and ...
Madan K. Oli (176585)   +3 more
core   +1 more source

Near‐Unity Chiral Lasing Enabled by Quasi‐Bound States in the Continuum

open access: yesAdvanced Materials, EarlyView.
Nanoimprinted chiral array that supports bound states in the continuum is doped with an efficient non‐chiral molecule (Rhodamine‐B) acting as gain medium to produce fully circularly polarized lasing emission. The chiral lasing wavelength can be tuned across the emission band of Rhodamine‐B by adjusting the coating thickness of the TiO2 high refractive ...
Jose Mendoza‐Carreño   +5 more
wiley   +1 more source

Improved estimates for extinction probabilities and times to extinction for populations of tsetse ( Glossina spp)

open access: yesPLOS Neglected Tropical Diseases, 2018
Abstract A published study used a stochastic branching process to derive equations for the mean and variance of the probability of, and time to, extinction in population of tsetse flies ( Glossina spp) as a function of adult and pupal mortality, and the probabilities that a female ...
Kajunguri, Damian   +2 more
openaire   +5 more sources

Mitigating Efficiency Roll‐Off in Phosphor‐Sensitized Fluorescence OLEDs via Molecular Polarity‐Based Benzofuropyridine Host Engineering

open access: yesAdvanced Optical Materials, EarlyView.
Positional isomerism in dibenzofuran‐based n‐type hosts modulates molecular polarity, charge‐transport balance, and emissive‐layer packing. The higher‐polarity BFPDB‐2 host facilitates efficient energy funneling, reduced aggregation, and preferential dipole orientation, leading to phosphor‐sensitized fluorescence OLEDs with enhanced external quantum ...
Nargis Ali   +3 more
wiley   +1 more source

The Dual Processes of a Class of Downwardly Skip-Free Processes

open access: yesAxioms
We show that a class of downwardly skip-free processes can be regarded as the Siegmund dual of upwardly skip-free processes, which have been extensively studied in the literature.
Pei-Sen Li, Pan Zhao
doaj   +1 more source

Predicted probability of extinction.

open access: yes, 2013
The x axis is population size for four childhood infections and the y axis is probability of extinction for island nations (red) and mainland nations (black) and showing upper and lower standard errors, taken at the median log proportion of resident ...
Ottar N. Bjørnstad (143155)   +4 more
core   +1 more source

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