منابع مشابه
The "hitchhiking effect" revisited.
The number of selectively neutral polymorphic sites in a random sample of genes can be affected by ancestral selectively favored substitutions at linked loci. The degree to which this happens depends on when in the history of the sample the selected substitutions happen, the strength of selection and the amount of crossing over between the sampled locus and the loci at which the selected substi...
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The weak field Zeeman effect [1] in simple atoms A = -4(r X B); B = (0,0, B) (2) was one of the earliest problems studied [2] in quantum mechanics. More recently, Ruderman [3] and Theorem 1. Let E~(O)be any negative eigenvalue of then others [4] discussed the analogous problem in the HydrogenHamiltonian H(0). Then there is an eigensuper-strong magnetic fields of the type encountered value [10] ...
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We analyse the dependence of stock return cross-correlations on the sampling frequency of the data known as the Epps effect: For high resolution data the cross-correlations are significantly smaller than their asymptotic value as observed on daily data. The former description implies that changing trading frequency should alter the characteristic time of the phenomenon. This is not true for the...
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In an influential article Tornell and Lane (1999) considered an economy, populated by multiple powerful groups, in which property rights in the formal sector are not protected. They argued that then investment in an informal sector may be optimal and set up conditions for “voracity” such that a permanent positive shock in the formal sector leads to lower economic growth. Here I show that whenev...
متن کاملThe Unruh effect revisited
We give a complete and rigorous proof of the Unruh effect, in the following form. We show that the state of a two-level system, uniformly accelerated with proper acceleration a, and coupled to a scalar bose field initially in the Minkowski vacuum state will converge, asymptotically in the detector’s proper time, to the Gibbs state at inverse temperature β = 2π a . The result also holds if the f...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1989
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.43-0248