Abstract The literature on autocracies has argued that repression of protest is either a result the political environment in which occurs, or depends particular characteristics events themselves. We argue interaction both matters. Authoritarian regimes vary how they legitimize their rule, and should be particularly thin-skinned if protesters challenge basis legitimacy. Using event-level data ma...

The influence of KCl concentration on the contraction kinetics of skinned frog muscle fibers at 5-7 degrees C was studied at various calcium levels. The magnitude of the calcium-activated force decreased continuously as the KCl concentration of the bathing solution was increased from 0 to 280 mM. The shortening velocity at a given relative load was unaffected by the level of calcium activation ...

A novel approach was developed allowing the measurement of steady-state force and intracellular calcium concentration ([Ca2+]i) in tetanized human ventricular trabeculae carneae without pharmacological intervention. We compared and contrasted three methods of assessing calcium sensitivity of the myofilaments: 1) force-[Ca2+] relations in skinned fiber preparations, 2) peak twitch force-peak [Ca...