The width=device-width part sets the width of the page to follow the screen-width of the device (which will vary depending on the device). The initial-scale=1 part sets the initial zoom level when the page is first loaded by the browser. 3. Containers. Bootstrap also requires a containing element to wrap site contents.
dirigente m, f (masculine and feminine plural dirigenti) 1  leading, ruling. 2  managerial, executive.
In this picture, an electromagnetic eigenmode of the periodic structure (called Bloch wave) is represented as a superposition of two counter-propagating waves that would exist in the absence of grating. Since neither of the components can propagate unaltered through the grating, they appear to interact between themselves.