1Universit ́e de Lyon, Laboratoire de Physique, E ́cole Normale Sup ́erieure de Lyon, CNRS UMR 5672, 46 All ́ee d’Italie, 69364 Lyon cedex 07, France. 2The Academy of Bradylogists. 3Member of the Extended McKinley Family (EMF). (Dated: July 9, 2014)
In this letter I highlight some of the recent developments around the rheology of Felis catus, with potential applications for other species of the felidae family. In the linear rheology regime many factors can enter the determination of the characteristic time of cats: from surface effects to yield stress. In the nonlinear rheology regime flow instabilities can emerge. Nonetheless, the flow rate, which is the usual dimensional control parameter, can be hard to compute because cats are active rheological materials.
Sepideh Khodaparast1, Franc ̧ois Boulogne1,2, Christophe Poulard2, and Howard A. Stone1
1Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA 2Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Universit ́e Paris-Saclay, Orsay 91400, France
September 4, 2017
Inks of permanent markers and water-proof cosmetics create elastic thin films upon application on a surface. Such adhesive materials are deliberately designed to exhibit water-repellent behavior. Therefore, patterns made up of these inks become resistant to moisture and cannot be cleaned by water after drying. However, we show that sufficiently slow dipping of such elastic films, which are adhered to a substrate, into a bath of pure water allows complete removal of the hydrophobic coatings. Upon dipping, the air-water interface in the bath forms a contact line on the substrate, which exerts a capillary-induced peeling force at the edge of the hydrophobic thin film. We highlight that this capillary peeling process is more effective at lower velocities of the air-liquid interface and lower viscosities. Capillary peeling not only removes such thin films from the substrate but also transfers them flawlessly onto the air-water interface.
At that time, we did not find any anti-Semitic categories, but we do not know if we captured all of Facebook’s possible ad categories, or if these categories were added later. A Facebook spokesman didn’t respond to a question about when the categories were introduced.
Last week, acting on a tip, we logged into Facebook’s automated ad system to see if “Jew hater” was really an ad category. We found it, but discovered that the category — with only 2,274 people in it — was too small for Facebook to allow us to buy an ad pegged only to Jew haters.
Facebook’s automated system suggested “Second Amendment” as an additional category that would boost our audience size to 119,000 people, presumably because its system had correlated gun enthusiasts with anti-Semites.