Results 81 to 90 of about 89,627 (264)

Theta blocks

Journal of the European Mathematical Society
We define theta blocks as products of Jacobi theta functions divided by powers of the Dedekind eta function and show that they give a new powerful method to construct Jacobi forms and Siegel modular forms, with applications also in lattice theory and algebraic geometry. One of the central questions is when a theta block defines a Jacobi form.
Valery Gritsenko, Nils-Peter Skoruppa, Don Zagier   +2 more
openaire   +3 more sources

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

Opers and theta functions

Advances in Mathematics, 2004
We construct natural maps (the Klein and Wirtinger maps) from moduli spaces of vector bundles on an algebraic curve $X$ to affine spaces, as quotients of the nonabelian theta linear series. We prove a finiteness result for these maps over generalized Kummer varieties (moduli of torus bundles), leading us to conjecture that the maps are finite in ...
Ben-Zvi, David, Biswas, Indranil
openaire   +3 more sources

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

Advanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao, Emad M. Elgallad, Alexandre Maltais, X.‐Grant Chen   +3 more
wiley   +1 more source

Possible role of acetylcholine in regulating spatial novelty effects on theta rhythm and grid cells

Frontiers in Neural Circuits, 2012
Pharmacological and lesion data indicate that acetylcholine plays an important role in memory formation. Increased levels of acetylcholine in the hippocampal formation are associated with successful encoding while disruption of the cholinergic system ...
Caswell eBarry, Caswell eBarry, James G Heys, Michael E Hasselmo   +3 more
doaj   +1 more source

Composition‐Tuned Enhancement of the Anomalous Nernst Effect in FeCo–Pt Thin Films on Rigid and Flexible Substrates

Advanced Engineering Materials, EarlyView.
Disordered (Fe50Co50)1−xPtx thin films exhibit a pronounced anomalous Nernst effect (ANE) with a strong composition dependence on both rigid and flexible substrates. The transverse thermoelectric response peaks near 22.5 at.% Pt, accompanied by enhanced αxy/σxy scaling, thermal transport, and ANE sensitivity.
Mojtaba Mohammadi, Hiroyuki Awano, Kenji Tanabe   +2 more
wiley   +1 more source

Low β2 Main Peak Frequency in the Electroencephalogram Signs Vulnerability To Depression.

Frontiers in Neuroscience, 2016
Objective:After an intense and repeated stress some rats become vulnerable to depression. This state is characterized by persistent low serum BDNF concentration.
Damien Claverie, Damien Claverie, Damien Claverie, Damien Claverie, Chrystel Becker, Chrystel Becker, Chrystel Becker, Chrystel Becker, Antoine Ghestem, Antoine Ghestem, Mathieu Coutan, Françoise Camus, Françoise Camus, Françoise Camus, Christophe Bernard, Christophe Bernard, Jean-Jacques Benoliel, Jean-Jacques Benoliel, Jean-Jacques Benoliel, Jean-Jacques Benoliel, Frédéric Canini, Frédéric Canini   +21 more
doaj   +1 more source

On the differential equation $\dot{\Theta}=(\Theta^{T}-\Theta)\Theta$ with $\Theta\in{SO(n)}$

, 2013
In this note we consider the global convergence properties of the differential equation $\dot{\Theta}=(\Theta^{T}-\Theta)\Theta$ with $\Theta\in{SO(n)}$, which is a gradient flow of the function $f:SO(n)\rightarrow\mathbb{R},\Theta\mapsto{2n-2\tr{\Theta}}$. Many of the presented results are not new, but scattered throughout literature.
Schmidt, Gerd Simon, Ebenbauer, Christian, Allgöwer, Frank   +2 more
openaire   +1 more source

Algebras, Graphs and Thetas

Electronic Notes in Theoretical Computer Science, 2019
We extend the clique-coclique inequality, previously known to hold for graphs in association schemes and vertex-transitive graphs, to graphs in homogeneous coherent configurations and 1-walk regular graphs. We further generalize it to a stronger inequality involving the Lovász theta number of such graphs, and some theta variants, including ...
Marcel Kenji de Carli Silva, Gabriel Coutinho, Chris D. Godsil, David E. Roberson   +3 more
openaire   +3 more sources

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source