" Our broadcasts are aimed at making that brain available: i. e . by distracting it, by relaxing it and preparing it between two messages. What we sell to Coca-Cola is time with this available human brain. " Sourcing The third filter concerns the mass medias' need for a continuous flow of information to fill their demand for daily news. In an industrialized economy where consumers demand information on numerous global events unfolding simultaneously, they argue that this task can only be filled by major business and government sectors that have the necessary material resources. This includes mainly The Pentagon and other governmental bodies. Super Hot Model Chomsky and Herman then argue that a "symbiotic relationship" arises between the media and parts of government which is sustained by economic necessity and reciprocity of interest. On the one hand, government and news-promoters strive to make it easier for news organizations to buy their services; according to the authors (p. "

", controller updates user's shopping cart) A view uses the model to generate an appropriate user interface (e. g. , view produces a screen listing the shopping cart contents). The view gets its own data from the model (or direct from the data access layer - sometimes there is no domain logic to do). The model should have no direct knowledge of the view. However, the observer pattern can be used to provide some indirection between model and view, allowing the model to notify interested parties of a change. A view object can register itself with the model and listen for changes but the model itself remains view-agnostic. Pure Hot Model The controller does not pass domain objects (the model) to the view although it might issue a command telling the view to update itself. The user interface waits for further user interactions, which begins the cycle anew. "