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The value of street art : on the commodity status of artworks removed from the street

As prices for so-called urban art (a term often used to describe the studio work of artists associated with the street art world) have risen over the last decade, the removal of and trading in actual street artworks has become increasingly widespread. This paper discusses what happens to ephemeral, often site specific, artworks when they are taken from the street and put on the art market. Many

Propagation of Coherent Light Pulses with PHASE

The current status of the software package PHASE for the propagation of coherent light pulses along a synchrotron radiation beamline is presented. PHASE is based on an asymptotic expansion of the Fresnel-Kirchhoff integral (stationary phase approximation) which is usually truncated at the 2nd order. The limits of this approximation as well as possible extensions to higher orders are discussed. The

A modified probing feeding strategy: control aspects

The paper presents a fermentation technique, which combines the advantages of the probing feeding strategy and the temperature limited fed-batch technique. The early phase of the cultivation is run under glucose limited conditions by using the original probing technique. When the maximum oxygen transfer capacity of the reactor is reached, the temperature is decreased to lower the oxygen demand. A