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Companies belonging to the same industrial branch are subject to similar economical influences. Hence, the time series of their stocks can show similar trends implying a correlation. Financial correlation matrices measure the unsystematic correlations between time series of stocks. Such information is important for risk management. It has been found by Laloux et al that the correlation matrices ar
The formation of cyclohexene in the hydrogenation of benzene on a ruthenium catalyst has been studied in a slurry reactor. The reaction was performed in an alkaline aqueous phase in a stirred autoclave of stainless steel. The influence of reaction parameters, e.g. hydrogen pressure, alkali concentration, amount of catalyst and temperature was determined. The influence of poisoning of the catalyst
This paper argues that the main contribution of Mirowski's paper is the new combination of some seemingly unrelated ideas, like principles for market evolvement and automata theory. Furthermore, many of Mirowski's ideas ought to be inspiring for future economic research. However, it is argued that some ideas, if scrutinized, are difficult to motivate, and other need further refinement before they
The inverse scattering problem on branching graphs is studied. The definition of the Schrodinger operator on such graphs is discussed. The operator is defined with real potentials with finite first momentum and using special boundary conditions connecting values of the functions at the vertices. It is shown that in general the scattering matrix does not determine the topology of the graph, the pot
Concerning the ship Götheborg of the Swedish East India Company
Let X-1, X-2,... be independent and symmetric random variables such that S-n = X-1+...+ X-n converges to a finite valued random variable S a. s. and let S* = sup(1 <= n
In a previous contribution (Stockmann H J 2002 J. Phys. A: Math. Gen. 35 5165), the density of states was calculated for a billiard with randomly distributed delta-like scatterers, doubly averaged over the positions of the impurities and the billiard shape. This result is now extended to the k-point correlation function. Using supersymmetric methods, we show that the correlations in the bulk are a
Spontaneous electrical and mechanical activity was abolished in isolated preparations of rat portal vein by exposure to K+-free Krebs solution. This procedure probably also increased the intracellular [Na+] owing to interference with the active transmembrane Na+-K+ transport. Contractures could be induced under these conditions by lowering extracellular [Na+] from the control level of 144 to 17 mM
Steady flow and mixing in a model of an "arterialized" vein punctured by a cannula as occurs during hemodialysis has been investigated in vitro. The motivation is that a major cause of vascular access dysfunction is the development of venous stenoses. This phenomenon lacks physiological explanation. However, one may attribute this quick process to the chemical content of the dialyzed blood and its
The present article is part of a larger project investigating the various types of linguistic change that affected and might affect the word class traditionally known under the label of interjection. The results of our research, as outlined here, concern the inter-linguistic mobility of units, i.e., borrowings, which in the source language can be (but not necessarily) interjections, and which are
The aim of the study was to evaluate an experimental approach based on a fluid percussion rat trauma model in combination with the microdialysis technique for the analysis of cerebral interstitial biochemical alterations following head trauma, and to test the hypothesis that the previously observed acute accumulation of lactate and increase in the lactate pyruvate ratio may persist for several day
Hans Rott is well-known for his work on belief revision theory in the tradition founded by Carlos Alchourro´ n, Peter Ga¨ rdenfors and David Makinson (hereafter, ‘AGM’) to which he has contributed in a number of fine articles. One of his main achievements is the establishment of far-reaching connections between AGM-style belief revision theory and the classical theory of rational choice, as the la
Little is known concerning possible hazards of maternal use of the recently introduced antidepressant drugs with noradrenergic and varying serotonergic activity (serotonin-noradrenaline reuptake inhibitor [SNRI]/noradrenergic reuptake inhibitor [NRI] drugs). Using the Swedish Medical Birth Registry, we identified 732 women who had used SNRI/NRI drugs in early pregnancy. Maternal characteristics we
