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Harold Lasswell's model, articulated in 1948, simplifies the act of communication into five basic elements: Who (communicator), Says What (message), In Which Channel (medium), To Whom (audience), and With What Effect (effect). This model is significant for its use in media studies and policy analysis to gauge the effectiveness of communication.

David Berlo's SMCR Model of Communication was introduced in 1960. It expanded on Shannon-Weaver's model by adding elements specific to human communication like Source, Message, Channel, and Receiver. This model emphasizes the importance of encoding and decoding processes and has been influential in understanding human communication in media management.

Developed in 1957, Westley and MacLean's Model of Communication considers a feedback loop and the role of a 'gatekeeper' in the communication process. It is applicable to mass communication and is significant in media management for understanding the dynamic between media channels and their audiences.

Stuart Hall's Encoding/Decoding Model of Communication, introduced in the 1970s, examines the complex processes involved in how media messages are produced (encoded) and interpreted (decoded) by audiences. It's significant for highlighting the active role of the audience in ascribing their own meanings to media messages.

Developed in the 1940s and expanded in the 1970s, the Uses and Gratifications Theory posits that media consumers actively seek out media that satisfies specific needs and desires. This approach has shifted the focus to the audience's active role in the communication process and their power in interpreting media messages.

Framing Theory, with roots going back to Goffman's work in the 1970s, focuses on how media and communicators present information and influence perception. It highlights the choices made in presentation and the significant consequences these choices have on audience interpretation.

Gatekeeping Theory explores how information is filtered and chosen for public consumption. Originating from Kurt Lewin in the 1940s, it has been applied to the media to explain the role of editors and media managers in shaping news narratives. It is significant in understanding the decision-making process behind media content.

Max McCombs and Donald Shaw developed the Agenda-Setting Theory in 1972. The theory proposes that the media doesn't tell people what to think, but rather what to think about by setting the agenda. This has been influential in media management for understanding the power of media in influencing public discourse.

Developed by Everett Rogers in 1962, the Diffusion of Innovations Theory explains how, why, and at what rate new ideas and technology spread through cultures. It is significant in media management for understanding how media can affect the adoption of new ideas or products by the public.

Developed by George Gerbner in the 1960s, Cultivation Theory argues that long-term exposure to media, particularly television, shapes viewers' perceptions of reality. It is significant in media studies for explaining how media can influence attitudes and beliefs over time.

The Shannon-Weaver Model, developed by Claude Shannon and Warren Weaver in 1949, is a foundational communication model that focuses on the technical aspects of information transmission. The model identifies several components, including an information source, transmitter, signal, noise source, receiver, and destination. It is significant for its introduction of the concept of 'noise' in communication processes.

Introduced by Paul Lazarsfeld, Bernard Berelson, and Hazel Gaudet in the 1940s, the Two-Step Flow Model suggests that media effects flow from mass media to opinion leaders, and from them to a wider audience. This model has been significant in understanding the indirect effects of media messages.