Results 121 to 130 of about 215,711 (281)

Wick's Theorem and a New Perturbation Theory Around the Atomic Limit of Strongly Correlated Electron Systems

, 1994
A new type of perturbation expansion in the mixing $V$ of localized orbitals with a conduction-electron band in the $U\to\infty$ Anderson model is presented. It is built on Feynman diagrams obeying standard rules.
Grüner G, Hewson A C, Izyumov Yu A, J Brinckmann, Kuramoto Y, Negele J W, Rasul J W, Read N, Zaitsev R O   +8 more
core   +1 more source

Challenges and Opportunities in Machine Learning for Light‐Emitting Polymers

Macromolecular Rapid Communications, EarlyView.
The performance of light‐emitting polymers emerges from coupled effects of chemical diversity, morphology, and exciton dynamics across multiple length scales. This Perspective reviews recent design strategies and experimental challenges, and discusses how machine learning can unify descriptors, data, and modeling approaches to efficiently navigate ...
Tian Tian, Yinyin Bao
wiley   +1 more source

Surface critical behavior of two-dimensional dilute Ising models

, 1997
Ising models with nearest-neighbor ferromagnetic random couplings on a square lattice with a (1,1) surface are studied, using Monte Carlo techniques and star-tiangle transformation method. In particular, the critical exponent of the surface magnetization
A. L. Talapov, A. M. Ferrenberg, B. M. McCoy, B. N. Shalaev, D. P. Landau, F. Iglói, F. Iglói, F. Szalma, H. J. Hilhorst, I. Peschel, J. -S. Wang, J. Cardy, P. Lajkó, R. Fisch, R. Kühn, Vik Dotsenko, W. Selke, W. Selke   +17 more
core   +1 more source

Autonomy for MRI Field Cameras: Synchronization, Self‐Calibration, and Sequence Detection

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose This work aims to provide a workflow for operating NMR field probes in MR scanners independently of pulse programming, scanner TTL trigger pulses and dedicated calibration sequences. Methods An independent timing system and limited prior knowledge about relative probe positions enable synchronous field measurement, probe position ...
Oskar Björkqvist, Klaas P. Pruessmann
wiley   +1 more source

Navigating across individual and deliberative values: A dual Q‐method approach to elicit diverse values in grassland restoration

People and Nature, EarlyView.
Abstract The current ‘UN Decade on Restoration’ calls for collaboration between scientists and practitioners to formulate guidelines for ecosystem restoration, within which transdisciplinary approaches are imperative to rethink the diverse values associated with nature, paving the way for sustainable ecosystem restoration.
Miguel A. Cebrián‐Piqueras, Konrad Gray, Lukas Kuhn, Jacqueline Loos, Ioana A. Pătru‐Dușe, Maraja Riechers, Vicky Temperton, Berta Martín‐López   +7 more
wiley   +1 more source

Beitrag zur Flora der Niederrheinischen Braunkohlenformation [PDF]

, 2007
Seit dem Erscheinen von O. WEBER'S Tertiärflora der niederrheinischen Braunkohleformation im 2. und 4. Bande der Palaeontographica (1852 und 1856) sind zwar von verschiedenen Seiten Mitteilungen über Funde fossiler Pflanzen aus dem niederrheinischen ...
Menzel, Paul
core  

Environmental Impact Assessment of an Innovative Sustainable Thermoplastic Anticorrosion Coating for Aluminum Alloy AA2024

Polymer Engineering &Science, EarlyView.
Life cycle assessment reveals that recyclable PPM coatings significantly reduce environmental impacts compared to epoxy, promoting sustainable aerospace corrosion protection. ABSTRACT This study evaluates the environmental performance of an innovative thermoplastic anticorrosion coating based on poly(phenylene methylene) (PPM) for aluminum alloy AA2024,
Marco Francesco D'Elia, Maider Iturrondobeitia, Erlantz Lizundia, Walter Caseri, Markus Niederberger   +4 more
wiley   +1 more source

Der Einfluss des lokalen Hochschulangebots auf die Studienwahl [PDF]

, 2018
Zusammenfassung: Verschiedene Studien belegen, dass das lokale Hochschulangebot bzw. die Distanz zur nächstgelegenen Universität das Studienverhalten beeinflusst: Die Wahrscheinlichkeit, ein Studium zu ergreifen, steigt mit der geographischen Nähe zu ...
Denzler, Stefan, Wolter, Stefan C.
core  

Defect Passivation via Plasma Modification of Lead Halide Perovskite Thin Films

Progress in Photovoltaics: Research and Applications, EarlyView.
We demonstrate that exposure of perovskite thin films to diffuse coplanar surface barrier discharge nitrogen plasma leads to an increase in photoluminescence, attributed to reduced defect densities. This results in implied open‐circuit voltage improvement of up to 80 mV and finalized solar cell open‐circuit gains up to 60 mV.
Ales Vlk, Robert Hlavac, Lucie Landova, Mykhailo Khytko, Swarnendu Banerjee, Julius Vida, Jiří Fujera, Mostafa Othman, Aïcha Hessler‐Wyser, Christophe Ballif, Christian Wolff, Tomas Homola, Martin Ledinsky   +12 more
wiley   +1 more source

Recent trends in U.S. and German banking: convergence or divergence? [PDF]

The purpose of this study is to focus on two leading industrialized nations - the U.S. and Germany - analyze the differences in the recent trends in their respective banking sectors and see if indeed the banking industries in these two leading economies ...
Biswas, Rita, Löchel, Horst
core