Die Konvergenzradien einiger zur von Lösung transzen-denter Gleichungen verwendeter Potenzreihen

Ohne Zusammenfassung     

On the structure of orthomodular posets

It is shown how all orthomodular posets (of various kinds) are constructible from families of sets satisfying various conditions, usually with the generating family emerging as identical with (or contained in) the family of frames (that is, maximal orthogonal subsets of the non-zero elements) of the constructed orthomodular poset.     

Bericht über den 4. Internationalen Kongre\ für Rheologie in Providence,Rhode Island (USA), vom 26.–30. August 1963

Ohne ZusammenfassungDerIII. Teil des Berichts über den 4. Internationalen Kongre\ für Rheologie 1963, der über etwa 35 weitere Vorträge berichtet, folgt in einem der nächsten Hefte. Hinsichtlich derbiorheologischen Beiträge sei auf den Tagungsbericht vonH. H. Pfeiffer-Bremen in Kolloid-Z. u. Z. Polymere195, H. 1, 53–57 (1964) und auf die Zeitschrift Biorheology verwiesen. Aus diesem Grunde wird darüber hier nicht nochmals gesondert berichtet.     

Condensed phases in flame spectrometry: an equilibrium model of the acetylene flame

An equilibrium model for a wet acetylene flame has been used for the calculation of the distribution of carbon, aluminium and silicon between gaseous and condensed phases. Calculated values of free atom vapour fractions are in agreement with published experimental data. It is thermodynamically probable that the formation of condensed phases limits atom vapour formation. There is a relationship between the position of an element in the Periodic Table and the nature of the condensed phase.     

Suppression factors in diffractive photoproduction of dijets

Now that new publications of H1 data for the diffractive photoproduction of dijets, which overlap with the earlier published H1 data and the recently published data of the ZEUS collaboration, have appeared, we have recalculated the cross sections for this process in next-to-leading order (NLO) of perturbative QCD to see whether they can be interpreted consistently. The results of these calculations are compared to the data of both collaborations. We find that the NLO cross sections disagree with the data, showing that factorization breaking occurs at that order. If direct and resolved contributions are both suppressed by the same amount, the global suppression factor depends on the transverse-energy cut. However, by suppressing only the resolved contribution, also reasonably good agreement with all the data is found with a suppression factor independent of the transverse-energy cut.     

Multiple equilibria and indifference-threshold points in a rational addiction model

Becker and Murphy (J Polit Econ 96(4):675–700, 1988) have established the existence of unstable steady states leading to threshold behavior for optimal consumption rates in intertemporal rational addiction models. In the present paper a simple linear-quadratic optimal control model is used to illustrate how their approach fits into the framework of multiple equilibria and indifference-threshold points. By changing the degree of addiction and the level of harmfulness we obtain a variety of behavioral patterns. In particular we show that when the good is harmful as well as very addictive, an indifference-threshold point, also known in the literature as a Skiba point, separates patterns converging to either zero or maximal consumption, where the latter occurs in the case of a high level of past consumption. This implicitly shows that an individual needs to be aware in time of these characteristics of the good. Otherwise, he/she may start consuming so much that in the end he/she is totally addicted.     

Eine neue Laboratoriums-Vakuumpumpe

Ohne Zusammenfassung