Forming, storming, norming and performing [1] – a well-known phase-modulation model of team building is probably reliable to describe the changeful relationship of Berlin Cultural and Berlin Digital in the Melting Pot of the metropolis. The pretty, shy bride awkwardly meets a nerdy, hyperactive groom when after the fall of the Berlin wall on November 9th, 1989, the wedding looms on the horizon:...

We report on cavitation in confined microscopic environments which are commonly called microfluidic or lab-on-a-chip systems. The cavitation bubble is created by focusing a pulsed laser into these structures filled with a light-absorbing liquid. At the center of a 20 microm thick and 1 mm wide channel, pancake-shaped bubbles expand and collapse radially. The bubble dynamics compares with a two-...

This paper is concerned with the airway closure problem and investigates the quasi-steady deformation characteristics of strongly collapsed (buckled) airways occluded by liquid bridges of high surface tension. The airway wall is modeled as a thin-walled elastic shell, which deforms in response to an external pressure and to the compression due to the surface tension of the liquid bridge. The go...

The collapse of sufficiently large closed domain wall produced during second order phase transition in the vacuum state of a scalar field can lead to the formation of black hole. The origin of domain walls with appropriate size and energy density could be a result of evolution of an effectively massless scalar field at the inflational epoch. We demonstrate that in this case the situation is val...

This computational study analyzes how to design a drainage system for porous scaffolds so that the scaffolds can be vascularized and perfused without collapse of the vessel lumens. We postulate that vascular transmural pressure--the difference between lumenal and interstitial pressures--must exceed a threshold value to avoid collapse. Model geometries consisted of hexagonal arrays of open chann...

In this issue, Arntz and colleagues published an interesting report on the daily (circadian), weekly (circaseptan) and monthly (circannual) variation in the occurrence of sudden death in West Berlin during the 5-year period from 1987 to 1991. The city of West Berlin, with about 2 million inhabitants, offered a unique opportunity of studying a population that was clearly defined within ‘the Wall...

For a project cooperation in landscape architecture, supported by the German Research Foundation (DFG), we looked at small strips of urban land in Germany and Israel that carry the marks of a violent political rupture. Two areas symptomatic of this condition in the cities of Berlin and Jerusalem were studied in terms of their disciplinary, social, and political changes: an area around the forme...

In Germany, and particu larly in Berlin , the fall of the Wall in 1989 and the years follow ing reuni® cation were accompanied by a large in ̄ ux of immigrants. These `new’ m igrants in Berlin are added to the long-resid ent guestworker population in the western part of the city. This paper investigat es the housing situation of the increasin g population of foreign ers before and after uni® cat...

Abstract The asymmetric collapse of cavitation bubbles near a solid substrate generates large wall shear stresses, the precise magnitude which is still not known with certainty. By comparing numerical simulations and experiments laser‐induced bubble substrate, we demonstrate that an accurate measurement pressure pulse emitted during inception maximum radius allow unique initialisation simulatio...