Atmospheric OH reactivities in the Pearl River Delta – China in summer 2006: measurement and model results S. Lou, F. Holland, F. Rohrer, K. Lu, B. Bohn, T. Brauers, C. C. Chang, H. Fuchs, R. Häseler, K. Kita, Y. Kondo, X. Li, M. Shao, L. Zeng, A. Wahner, Y. Zhang, W. Wang, and A. Hofzumahaus School of Environmental Science and Technology, Shanghai Jiatong Univ., Shanghai, China Institut für Ch...

Frequency selective N.M.R. pulse sequences generated by iterative schemes with multiple fixed points H. Cho a b c , K.T. Mueller a b , A.J. Shaka a b d & A. Pines a b a Materials and Chemicals Sciences Division, Lawrence Berkeley Laboratory, 1 Cyclotron Road, Berkeley, California, 94720, U.S.A. b Department of Chemistry, University of California, Berkeley, California, 94720, U.S.A. c Laboratori...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

After inflation occurs, a weakly coupled scalar field will in general not be in thermal equilibrium but have a distribution of values determined by the inflationary Hubble parameter. If such a field subsequently undergoes discrete symmetry breaking, then the different degenerate vacua may not be equally populated so the domain walls which form will be ‘biased’ and the wall network will subseque...

Investigations of pore coalescence and individual cell wall collapse in an expanding liquid metal foam by means of X-ray radioscopy with spatio-temporal micro-resolution are reported. By using white synchrotron radiation for imaging, the rupture of a film and the subsequent merger of two neighbouring bubbles could be recorded with a time sampling rate of 40000 frames s(-1) (25 micros exposure t...

The fluid dynamic interaction of cavitation bubbles with adherent cells on a substrate is experimentally investigated. We find that the nonspherical collapse of bubbles near to the boundary is responsible for cell detachment. High-speed photography reveals that a wall bounded flow leads to the detachment of cells. Cells at the edge of the circular area of detachment are found to be permanently ...

The dynamics of a water jet on a flat free surface are investigated using a nanosecond pulsed laser for creating an oscillating bubble with different depths beneath the free surface. A thin jet is shown to deform a crater surface resulted from surface depression and cause a circular ring-shaped crater on the connection surface between the crater of surface depression and the thin jet. The colla...

JCB • VOLUME 215 • NUMBER 2 • 2016 140 As a teenager growing up in West Berlin, Katja Röper witnessed the fall of the Berlin Wall from Checkpoint Charlie, and the opening of the Brandenburg Gate, amazing moments in history that reshaped her home country. During these years, her parents— a mineralogist and a nurse—were also shaping her future career as a scientist by encouraging her fascination ...

To describe Berlin as a construction site has become a cliché. A report from March 2000 in The Architectural Review reads: “Cranes have dominated Berlin’s skyline [for] the past ten years.” 1 Five years prior, an article in Art in America declared: “Six years after the fall of the Wall, Berlin is coming more and more to resemble a vast construction site.” 2 Cranes and scaffolding can be seen al...

Material deformation and pitting from cavitation bubble collapse is investigated using fluid and material dynamics and their interaction. In the fluid, a novel hybrid approach, which links a boundary element method and a compressible finite difference method, is used to capture non-spherical bubble dynamics and resulting liquid pressures efficiently and accurately. The bubble dynamics is intima...