Compared to Poiseuille flow in a rectangular channel, the SHM achieved fluid mixing faster and within a shorter channel length. In addition, in the herringbone ridge mixer, the axial dispersion, i.e. spread of a plug introduced into the channel, is greatly reduced.

The authors demonstrated that the channel length required to achieve 90% mixing increases with the natural logarithm of the Peclet number (as opposed to being directly proportional) at high flow rates. Since log(x) grows much slower than x, the channel length required to achieve full mixing remains small, even at high flow rates, when chaotic mixing methods (such as the one demonstrated in this work) are used.

Here the authors describe some possible applications that could benefit from this work. One specific application described is diffusion limited reactions which might happen at a surface such as those between an electrode and electrolytes in solution or between immobilized antibodies and antigens in solution. A previous annotation mentions a protein detection mechanism from blood samples which is dependent on a diffusion limited reaction.

The authors have proven that they have created a novel mixing technique which is more effective that standard diffusion mixing, easier to integrate into other microfluidic structurers than current mixing techniques, and doesn't require any complicated active device components.

The SHM demonstrated a shorter mixing length and remained significantly less impacted by an increase in flow speed compared to a simple microchannel.

This method of mixing can be adapted to most microfluidic devices as it has a negligible effect on the overall flow characteristics.

In the SHM, mixed fluid spreads less along the channel (Fig 4C) in comparison to the unstirred flow (Fig 4B).

The rationale here is that if anti-ISIS agencies do not shut down smaller aggregates at a sufficient rate, these aggregates will merge (coalesce) into bigger ones, which will be harder to shut down. Eventually, this process will repeat until a "super-aggregate" is formed, which will be very hard to shut down.

An account page created on Facebook or VKontakte can be marked as an "organization". These pages are often used for informal organizations or groups of people interested in a particular subject. In the case of pro-ISIS aggregates, the pages contain material expressing a strong allegiance to ISIS and are followed by people interested in such material.

In the Supplementary Material, the authors point out that pages containing ISIS-related content are almost imediately shut down on Facebook and that such pages experience longer lifetimes on VKontakte.