Results 231 to 240 of about 591,251 (265)

The Heisenberg ferromagnet with higher-order exchange

Journal of Physics C: Solid State Physics, 1979
The authors investigate the properties of ferromagnetic spin systems with higher-order exchange interactions, in particular with four-spin terms of the form (Si.Sj)(Sk.Sl) and (Si.Sj)(Sj.Sk). Using the Green function equation of motion method, and simple decoupling approximations, they obtain renormalised spin-wave energies, magnetisation curves, and ...
J Adler, J Oitmaa
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First-order eikonal exchange amplitudes

Physical Review A, 1982
A detailed derivation of a first-order analytic approximation to the electron-hydrogen charge-exchange amplitude in both the Glauber approximation and eikonal approximmations in both post and prior forms is presented. The results are applicable to arbitrary initial states.
Victor Franco, Alvin M. Halpern
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Equity order flow and exchange rate dynamics

Journal of Empirical Finance, 2012
Abstract This paper contributes to the literature on international portfolio choice in several ways. First, I generalize the model of Dunne et al. (2010) and derive order flow as the result of correlated belief changes by heterogeneous investors. This strategy delivers testable implications for the daily dynamics of stock flows, equity returns, and ...
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Architecture and Wilderness: An Exchange of Order

2019
If wilderness refers to those spaces that are unoccupied by humans while architecture is one major way that humans occupy space, the terms seem to be mutually exclusive. However, this thesis argues that wilderness and architecture have a fundamental similarity: they are both ways that humans understand and relate to the world.
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Exchange symmetry of magnetically ordered crystals

Soviet Journal of Low Temperature Physics, 1980
We present a phenomenological method which makes it possible, in the framework of the exchange approximation, to find the possible microscopic spin-density distribution compatible with a given lattice space group in the magnetically ordered state. All the possible magnetic structures (homogeneous and helical) are found and classified according to ...
V. G. Bar’yakhtar, D. A. Yablonskii
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Limit order for Decentralized Exchanges on Blockchain

2023 22nd RoEduNet Conference: Networking in Education and Research (RoEduNet), 2023
Razvan-Andrei Tanase, Costin Carabas, Nicolae Tapus   +2 more
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Order Exchange Key in Data Encryption

2012
This Paper presents a new data encryption conception and algorithm. Generally the method of encryption is fixed and different key gets different encryption result. In this paper, one general data encryption key DK is used, and from the DK key we can get another key MK which is used to change the encryption method.
Mo Hong Fei, Fan Jing, Li Hong Lian
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Exchange by ORDer

Nature Reviews Molecular Cell Biology, 2010
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Streambed microbial communities in the transition zone between groundwater and a first-order stream as impacted by bidirectional water exchange

Water Research, 2022
OSCAR Jiménez-Fernández, Karsten Osenbrück, Marc Schwientek   +2 more
exaly  

LSTM forecasting foreign exchange rates using limit order book

Finance Research Letters, 2022
Yoshihiro Kitamura
exaly