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Biquadratic Exchange and Spin Exchange
AIP Conference Proceedings, 1973Calculations have been made of the effect of modifying the usual Heisenberg‐Dirac exchange operator, −2JΣSi.Sj, in two different ways: (1) Including a biquadratic exchange term −2αJΣ(Si.Sj)2, whose strength depends on α. (2) Using the more general spin exchange operator of Schrodinger for spin ≥1, ΣAn (Si.Sj)n, with n summed from zero to twice the spin.
H. A. Brown +3 more
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Rethinking History, 2000
In this debate Mark Bevir and Frank Ankersmit continue their discussion of Bevir's The Logic of the History of Ideas. There are two related areas of contention: 1) the notion of intention and its use for a correct understanding of the writing of the history of ideas and 2) the question how deep the (ontological and/or epistemological) gap runs ...
Bevir, M, Ankersmit, F
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In this debate Mark Bevir and Frank Ankersmit continue their discussion of Bevir's The Logic of the History of Ideas. There are two related areas of contention: 1) the notion of intention and its use for a correct understanding of the writing of the history of ideas and 2) the question how deep the (ontological and/or epistemological) gap runs ...
Bevir, M, Ankersmit, F
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This chapter elaborates Kōjin Karatani’s “Borromean knot”: How he thinks that religion, nation, state, and exchange are all—for better or for worse—interrelated. In doing so, it also considers how these three persist in light of one another and how notions such as religion, secularism, and political theology must thereby be rethought, given their ...
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Exchange Rates and Exchange Controls
1987A currency crisis, which would normally and inevitably follow as balance of payments difficulties loom was only held back in early 1987 by a combination of the highest real interest rates in our history (and in the developed world) and a number of fortuitious circumstances that cannot last — an OPEC price increase, chaos inside the EMS and dollar ...
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New England Journal of Medicine, 2004
If an anthropologist were to stumble into this room between 6 and 8 p.m. this evening, he might find the telltale signs of a ritual: a group of residents and interns huddled around a table, scribbl...
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If an anthropologist were to stumble into this room between 6 and 8 p.m. this evening, he might find the telltale signs of a ritual: a group of residents and interns huddled around a table, scribbl...
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GLQ: A Journal of Lesbian and Gay Studies, 2017
H.D.'s Tribute to Freud, a 1956 account of her analysis in the 1930s, posits two kinds of time. One is an intractable temporality that she calls “clock-time,” the unceasing movement of history toward a traumatic future—above all, the threat of Sigmund Freud's impending death and the encroachment of the Nazis on Vienna. Against this murderous imposition,
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H.D.'s Tribute to Freud, a 1956 account of her analysis in the 1930s, posits two kinds of time. One is an intractable temporality that she calls “clock-time,” the unceasing movement of history toward a traumatic future—above all, the threat of Sigmund Freud's impending death and the encroachment of the Nazis on Vienna. Against this murderous imposition,
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Approximate Exchangeability and De Finetti Priors in 2022
Scandinavian Journal of Statistics, 2023exaly