Results 221 to 230 of about 576,963 (265)

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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Biquadratic Exchange and Quadrupolar Ordering

Journal of Applied Physics, 1969
We have studied in the molecular field approximation the statistical mechanical properties of the Hamiltonian H= ∑ mnJ(m−n)Sm·Sn− ∑ mnj(m−n)(Sm·Sn)2,for spin one ions. Other authors have already shown that the biquadratic term can cause the magnetic transition to become first order.1 Closer examination shows that one must consider, in addition to the ...
M. Blume, Y. Y. Hsieh
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Exchangeable Random Orders and Almost Uniform Distributions

Journal of Theoretical Probability, 2000
Let \({\mathcal V}\) \([{\mathcal T}]\) denote the set of all partial [total] orders on \(\mathbb{N}\). For \(U,V\in{\mathcal V}\), let \(U\vee V\) be the smallest partial order containing \(U\cup V\), and put \(\langle V\rangle=\{j \in\mathbb{N}\): there is \(k\neq j\) such that either \((j,k)\in V\) or \((k,j)\in V\}\).
Hirth, Ulrich, Ressel, Paul
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Second-order eikonal exchange amplitudes

Physical Review A, 1986
The analytic expressions of the second-order eikonal exchange amplitudes are derived for electron-hydrogen scattering in both post and prior forms. In the case of the Glauber exchange amplitude, these expressions are shown to be reducible to closed forms. The results are applied to the calculation of elastic e-H(1s) scattering.
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The Exchange Order

2017
This book illuminates a comprehensive social system that comprises explicit markets, tort liability, and criminal liability, and describes each of these three institutions as serving the same function in different social and physical circumstances. It defines exchanges as compensated transfers of rights and objects among individuals, and shows that ...
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Exchange Competition and Order Splitting

SSRN Electronic Journal, 2016
The emergence of new trading platforms has intensified order fragmentation. Yet, little is known on how this phenomenon affects the behavior of profit maximizing exchanges. I show that fragmentation may allow competing exchanges to retain market power. When order splitting is beneficial for traders, competing exchanges are complements.
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On the notion of second-order exchangeability

Erkenntnis, 1996
In this paper we consider the conditions of second-order exchangeability and second-order partially exchangeability together with some applications.
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Limit order placement across multiple exchanges

2012 IEEE Conference on Computational Intelligence for Financial Engineering & Economics (CIFEr), 2012
The US equity exchange market is organized as a National Market System, enforcing price priority across exchanges, but otherwise allowing competition for order flow among exchanges. This flexibility has naturally evolved to a market where exchanges have varying quality and cost of execution.
Raymond Yim, Andrew Brzezinski
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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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Competing double-exchange/super-exchange ordering for enhanced water oxidation kinetics

Chemical Communications
An efficient and ultra-stable electrochemical water oxidation system is proposed based on competing double-exchange and super-exchange interactions in ruthenium-doped lanthanum strontium manganites.
Alpana Sahu, Aswathi K. S., Amit Kumar Rajak, Roshan Naik, Mohammad Qureshi   +4 more
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