Results 101 to 110 of about 2,455,001 (344)

Non-Universal Critical Behaviour of Two-Dimensional Ising Systems

, 2004
Two conditions are derived for Ising models to show non-universal critical behaviour, namely conditions concerning 1) logarithmic singularity of the specific heat and 2) degeneracy of the ground state. These conditions are satisfied with the eight-vertex
Barber M N, Baxter R J, Baxter R J, Burkhardt T W, Dalton N W, Gibbert R W, Jüngling K, K Minami, Kadanoff L P, M Suzuki, Oitmaa J, Suzuki M, Tanaka K, Tanaka K   +13 more
core   +2 more sources

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

Model companions of theories with an automorphism [PDF]

arXiv, 1998
For a theory $T$ in $L, T_\sigma$ is the theory of the models of $T$ with an automorphism $\sigma$. If $T$ is an unstable model complete theory without the independence property, then $T_\sigma$ has no model companion. If $T$ is an unstable model complete theory and $T_\sigma$ has the amalgamation property, then $T_\sigma$ has no model companion. If $T$
arxiv  

A General Formulation for Evaluating the Performance of Linear Power Flow Models [PDF]

arXiv, 2021
Linear power flow (LPF) models are essential in power system analysis. Various LPF models are proposed, but some crucial questions are still remained: what is the performance bound (e.g., the error bound) of LPF models, how to know a branch is applicable for LPF models or not, and what is the best LPF model.
arxiv  

Ising model of a glass transition

Physical Review E, 2013
Numerical simulations by Tanaka and coworkers indicate that glass forming systems of moderately polydisperse hard-core particles, in both two and three dimensions, exhibit diverging correlation lengths. These correlations are described by Ising-like critical exponents, and are associated with diverging, Vogel-Fulcher-Tamann, structural relaxation times.
openaire   +5 more sources

Aperiodic Ising Models

, 1997
We consider several aspects of non-periodic Ising models in one and two dimensions. Here we are not interested in random systems, but rather in models with intrinsic long-range aperiodic order. The most prominent examples in one dimension are sequences generated by substitution rules on a finite alphabet.
Grimm, Uwe, Baake, Michael
openaire   +2 more sources

Tricritical Ising model with a boundary [PDF]

Nuclear Physics B, 1998
We study the integrable and supersymmetric massive $\hat _{(1,3)}$ deformation of the tricritical Ising model in the presence of a boundary. We use constraints from supersymmetry in order to compute the exact boundary $S$-matrices, which turn out to depend explicitly on the topological charge of the supersymmetry algebra.
A. De Martino, A. De Martino, M. Moriconi   +2 more
openaire   +3 more sources

Exact ground states of a spin-1/2 Ising-Heisenberg model on the Shastry-Sutherland lattice in a magnetic field

, 2014
Exact ground states of a spin-1/2 Ising-Heisenberg model on the Shastry-Sutherland lattice with Heisenberg intra-dimer and Ising inter-dimer couplings are found by two independent rigorous procedures.
Mila, Frederic, Schmidt, Kai P., Strecka, Jozef, Verkholyak, Taras   +3 more
core   +1 more source

Thermally Induced Gelling Systems Based on Patchy Polymeric Micelles

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
A novel strategy to design thermally induced gelling systems with tunable material properties is reported. Polymeric mixed‐shell micelles displaying multiple thermosensitive patchy domains formed hydrogels by assembling into well‐entangled worm‐like network structures upon heating to body temperature. The patchy micelle design significantly affects the
Binru Han, Shota Fujii, André J. van der Vlies, Masoud Ghasemi, Joshua T. Del Mundo, Sarah N. Kiemle, Esther W. Gomez, Enrique D. Gomez, Ralph H. Colby, Urara Hasegawa   +9 more
wiley   +1 more source

Toward Practical Benchmarks of Ising Machines: A Case Study on the Quadratic Knapsack Problem

IEEE Access
Combinatorial optimization has wide applications from industry to natural science. Ising machines bring an emerging computing paradigm for efficiently solving a combinatorial optimization problem by searching a ground state of a given Ising model ...
Kentaro Ohno, Tatsuhiko Shirai, Nozomu Togawa   +2 more
doaj   +1 more source