Anomalously Slow Dewetting of Colloidal Particles at a Liquid/Gas Interface

We consider the anomalously slow dewetting of colloidal particles adsorbed at a liquid/gas interface. The particles move in the vertical direction under the action of a regular capillary force and an irregular force caused by defects (roughness and chemical heterogeneity). The particle diffusion is modeled by a random walk over a potential minima with jump rates determined by the Arrhenius law. The averaged particle motion is found under the assumption of Gaussian distributions for characteristic properties of spatial heterogeneities.

The Wilson Administration and Panama, 1913-1921

“One of the chief objects of my administration,” Woodrow Wilson stated on March 11, 1913, after learning of political unrest in the Caribbean, “will be to cultivate the friendship and deserve the confidence of our sister republics of Central and South America, and to promote in every proper and honorable way the interests which are common to the peoples of the two continents.” Believing, however, that “cooperation is possible only when supported at every turn by the orderly processes of just government based upon law, not upon arbitrary or irregular force,” he wanted the Latin American nations to build their governments upon the same foundation of law and order as that of the United States. On the part of his own nation, he renounced, in his Mobile Address of October 27, 1913, the “Dollar Diplomacy” of his predecessors Theodore Roosevelt and William Howard Taft, and proposed instead a Pan American Pact to provide mutual guarantees of political independence and territorial integrity.