"g. Westinghouse or General Electric) . Such conglomerates frequently extend beyond traditional media fields, and thus have extensive financial interests that may be endangered when certain information is widely publicized. Thus, according to this reasoning, news items that most endanger the corporate financial interests that own the media will face the most bias and censorship. The authors claim that the importance of ownership filter is the fact that corporations are subject to shareholder control in the context of a profit-oriented market economy. The theory then argues that maximizing profit means sacrificing news objectivity, and news sources that ultimately survive must be fundamentally biased, with regard to news in which they have a conflict of interest. Funding The authors also argue that the mainstream media depends heavily on advertising revenues to survive. Model Railroad Retail Canada A newspaper like the New York Times, for example, derives 75% of its revenues from advertisements. The authors suggest that this filter is best seen by adopting a traditional business framework. "

" Also other properties of O may not be properties of M. In that sense a model is more abstract than its original. Secondly, a model M will in general have properties that O does not have and that actually aid I in investigating M. What the investigator I does in modeling is formulating a problem P in terms of the original O, translate that problem into a problem P' in terms of M, obtain a solution S' of P' and translate S' into a solution candidate S of P in terms of O. If S is actually a solution of P then the modeling process was successful and can be terminated. If, however, that is not the case then the investigator I can start over with a different problem, model, means of investigation, or relation between model and original. It is worth noting that the concept of solution to a problem depends on the investigator, its purpose, intended means of investigation, time-horizon of that investigation and so forth. Model Railroad Part What has been presented here so far essentially is due to Stachowiak, [1]. To understand how then models are used in more detail one needs to distinguish from each other the various reference modes in which the investigator puts the model with respect to the original. "