We examine the relation between venture capital (VC) investments and mergers and acquisitions (M&A) activity around the world. We find evidence of a strong positive association between VC investments and lagged M&A activity, consistent with the hypothesis that an active M&A market provides viable exit opportunities for VC companies and therefore incentivizes them to engage in more deals. We als...

• Euler-Lagrange simulations of agitated solids suspensions including breakage Solids distribution and flow structures evolve with particle size reduction process Revolving impeller is the major source Two-way coupled solids-liquid in a lab-scale mixing tank operating at Reynolds number 4000 volume fraction 10% have been performed. The keep track individual particles, their collisions. Upon col...

We give a new, elementary, purely analytical development of Descartes’ theorem that a smooth connected surface is a perfect focusing lens if and only if it is a connected subset of the ovoid obtained by revolving a cartesian oval around its axis of symmetry.

Recent studies have demonstrated that a quasi-steady model closely matches the instantaneous force produced by an insect wing during hovering flight. It is not clear, however, if such methods extend to forward flight. In this study we use a dynamically scaled robotic model of the fruit fly Drosophila melanogaster to investigate the forces produced by a wing revolving at constant angular velocit...

Correction for ‘Modular off-chip emulsion generator enabled by a revolving needle’ Yuxin Zhang et al., Lab Chip, 2020, 20, 4592–4599, DOI: 10.1039/D0LC00939C.