Results 71 to 80 of about 80,615 (316)

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

Advanced 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, Christopher Wöpke, Toni Seiler, Jared Faisst, Mathias List, Meike Kuhn, Bekcy Joseph, Alexander Ehm, Dietrich R. T. Zahn, Yana Vaynzof, Eva M. Herzig, Roderick C. I. Mackenzie, Uli Würfel, Maria Saladina, Carsten Deibel   +14 more
wiley   +1 more source

The Asymptotic Distribution of Extreme Sums

The Annals of Probability, 1991
Let \(X_{1,n}\leq\ldots\leq X_{n,n}\) be the order statistics of \(n\) independent random variables with a common distribution \(F\), and let \(T_ n=X_{n,n}+\ldots+X_{n+1-k(n),n}\), where \(\{k(n)\}\) is a sequence of positive integers such that \(k(n)\rightarrow\infty\) and \(k(n)/n\rightarrow\alpha\) as \(n\rightarrow\infty\), with \(0\leq\alpha0 ...
Csorgo, Sandor, Haeusler, Erich, Mason, David M.   +2 more
openaire   +2 more sources

Tailoring Phonon‐Driven Responses in α‐MoO3 through Isotopic Enrichment

Advanced Materials, EarlyView.
ABSTRACT The implementation of polaritonic materials into nanoscale devices requires selective tuning of parameters to realize desired spectral or thermal responses. One robust material, α‐MoO3, an orthorhombic crystal boasting three distinct phonon dispersions, provides three polaritonic dispersions of hyperbolic phonon polaritons (HPhPs) across the ...
Thiago S. Arnaud, Ryan W. Spangler, Johnathan D. Georgaras, Jonah B. Haber, Daniel Hirt, Maximilian Obst, Gonzalo Álvarez‐Pérez, Mackey Long III, Felix G. Kaps, Jakob Wetzel, Courtney Ragle, John E. Buchner, Youngji Kim, Aditha S. Senarath, Richarda Niemann, Mingze He, Giulia Carini, Unai Arregui‐Leon, Akash C. Behera, Ramachandra Bangari, Nihar Sahoo, Niels C. Brumby, J. Michael Klopf, Martin Wolf, Lukas M. Eng, Susanne C. Kehr, Thomas G. Folland, Alexander Paarmann, Patrick E. Hopkins, Felipe Jornada, Jon‐Paul Maria, Joshua D. Caldwell   +31 more
wiley   +1 more source

Time‐Resolved Simultaneous Mapping of Thickness and Nanoparticle Concentration in Nanofluid Thin Films via Imaging Ellipsometry and Deep‐UV Reflectance Imaging

Advanced Materials Interfaces, EarlyView.
This study establishes a dual‐channel optical metrology framework integrating phase‐shifting imaging ellipsometry and deep‐UV reflectance imaging. This label‐free approach enables simultaneous, time‐resolved mapping of film thickness and nanoparticle (NP) concentration in dynamic nanofluid thin films.
Eita Shoji, Keita Aizawa, Hiroki Kusudo, Tetsushi Biwa   +3 more
wiley   +1 more source

Testing proportional hazards for specified covariates

Modern Stochastics: Theory and Applications, 2019
Tests for proportional hazards assumption concerning specified covariates or groups of covariates are proposed. The class of alternatives is wide: log-hazard rates under different values of covariates may cross, approach, go away.
Vilijandas Bagdonavičius, Rūta Levulienė   +1 more
doaj   +1 more source

The Asymptotically Unbiased Prior Distribution

The Annals of Mathematical Statistics, 1965
In estimation of a real valued parameter $\theta$, using observations from the probability density $f(x \mid \theta)$, and using loss function $L(\theta, \phi)$, the prior density which minimizes asymptotic bias of the associated estimator is shown to be $J(\theta) = \varepsilon((\partial/\partial\theta) \log f)^2/\lbrack(\partial^2/\partial\phi^2)L ...
openaire   +3 more sources

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Testing Homogeneity for Poisson Processes Prueba de homogeneidad para procesos de Poisson

Revista Colombiana de Estadística, 2011
We developed an asymptotically optimal hypothesis test concerning the homogeneity of a Poisson process over various subintervals. Under the null hypothesis, maximum likelihood estimators for the values of the intensity function on the subintervals are ...
ALEJANDRA TAPIA, RAÚL FIERRO
doaj  

Asymptotic Results on Matching Distributions

Journal of the Royal Statistical Society Series B: Statistical Methodology, 1973
Summary The generalized matching distribution is investigated. A necessary and sufficient condition for asymptotic Poissonity is given. The case of two identical decks is given special attention.
openaire   +2 more sources

The Asymptotic Distribution of Trimmed Sums

The Annals of Probability, 1988
Let \(X_{1,n}\leq \cdot \cdot \cdot X_{n,n}\) be the order statistics of n independent random variables with a common distribution function F, and let m(n) and k(n) be positive integers such that m(n)\(\to \infty\), k(n)\(\to \infty\), m(n)/n\(\to 0\) and k(n)/n\(\to 0\) as \(n\to \infty\).
Csorgo, Sandor, Haeusler, Erich, Mason, David M.   +2 more
openaire   +3 more sources