Oscillation period doubling chaos in a laser

We observe chaotic emission from a continuous He-Ne laser, approached by oscillation period doubling.     

Baumwolle als Elektret

Ohne Zusammenfassung     

On Resource Allocation Problems with Interval-Scale Coefficients

In this paper we discuss the classical problem of the allocation of a single finite resource among many competing activities for the specific case where the coefficients of the objective function form an interval scale. In this case there is no longer a single optimal solution, but rather a set of efficient solutions. We recommend a technique equivalent to parametric objective function analysis to generate the set of efficient solutions to the problem.     

Cyclopropene als komplexliganden. Cyclopropenthionkomplexe mit den gruppen Cr(CO)5 und (C5H5)Mn(CO)2

Diphenylcyclopropenethione and dithienylcyclopropenethione react with (acetonitrile)₃Cr(CO)₃ under mild conditions with formation of (C₃Ph₂S)Cr(CO)₅ and [C₃(C₄H₃S)₂S]Cr(CO)₅, respectively. Using (η⁵-C₅H₅)(THF)Mn(CO)₂ and diphenylcyclopropenethione a different type of complex with the stoichiometry (C₃Ph₂S)₂Mn(C₅H₅)(CO)₂ is obtained. A structure with a ligand containing two S bridges is proposed.     

A simple extended source for high resolution holography

As a simple realization of an extended source in high resolution holography spheres made of homogeneous glass are treated experimentally and theoretically. A matrix of such glass balls has been used for producing point holograms for multiple imaging systems. Using spatially incoherent light in the imaging process, the squared absolute value of the autocorrelation function of the wave front in the focus of the spheres determines the image resolution. The measured resolution of about 1.5 μm agrees with the value expected from the measured and calculated autocorrelation width.     

The (2H-d)-reactions below 200 keV

The²H(d, n)- and²H(d, p)-reactions are studied for deuteron energies below 200 keV. It is shown that theR-matrix approach of Konopinski and Teller, which is very sensitive to the channel radius used, can be approximated in a way that the dependence on the channel radius does not appear explicitly. This approach appears to be formally equivalent to a kind of “direct approach” of Boersma. This equivalence answers the question why a direct approach to these reactions works at all at low energies. Each reaction is described by three parameters which are determined in a fit to the up to now available data.