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Karol Borsuk (8 May 1905 – 24 January 1982) was a Polish mathematician. His main area of interest was topology . He made significant contributions to shape theory , a term which he coined.
The four-sides model (also known as communication square or four-ears model) is a communication model postulated in 1981 by German psychologist Friedemann Schulz von Thun. According to this model every message has four facets though not the same emphasis might be put on each.
Channels: Use established channels of communication—channels the receiver uses and respects. Creating new channels is difficult. Capability of audience: Communication must take into account the capability of the audience. Communications are most effective when they require the least effort on the part of the recipient.
[7] For all n for fields of revolution — shown by Boris Dekster (1995). [8] The problem was finally solved in 1993 by Jeff Kahn and Gil Kalai, who showed that the general answer to Borsuk's question is no. [9] They claim that their construction shows that n + 1 pieces do not suffice for n = 1325 and for each n > 2014.
The theory presented in "Communication Theory as a Field" has become the basis of the book "Theorizing Communication" which Craig co-edited with Heidi Muller, [14] as well as being adopted by several other communication theory textbooks as a new framework for understanding the field of communication theory. [15] [16] [17] [18]
The problem of communication was already discussed in Ancient Greece but the field of communication studies only developed into a separate research discipline in the middle of the 20th century. All early models were linear transmission models, like Lasswell's model , the Shannon–Weaver model , Gerbner's model, and Berlo's model .
Robert T. Craig "Communication Theory as a Field" is a 1999 article by Robert T. Craig, attempting to unify the academic field of communication theory. [1] [2]Craig argues that communication theorists can become unified in dialogue by charting what he calls the "dialogical dialectical tension", or the similarities and differences in their understanding of "communication" and demonstrating how ...
A space is an absolute neighborhood retract for the class , written (), if is in and whenever is a closed subset of a space in , is a neighborhood retract of . Various classes C {\displaystyle {\mathcal {C}}} such as normal spaces have been considered in this definition, but the class M {\displaystyle {\mathcal {M}}} of metrizable spaces ...