Radio broadcasting and Television The sequencing of content in a broadcast is called a schedule. With all technological endeavours a number of technical terms and slang have developed. Please see the list of broadcasting terms for a glossary of terms used. Radio and television programs are distributed over frequency bands that in the United States are highly regulated.
Paleobiology[ edit ] Quetzalcoatlus was abundant in Texas during the Lancian in a fauna dominated by Alamosaurus. There have been a number of different ideas proposed about the lifestyle of Quetzalcoatlus. Because the area of the fossil site was four hundred kilometers removed from the coastline and there were no indications of large rivers or deep lakes nearby at the end of the Cretaceous, Lawson in rejected a fish-eating lifestyle, instead suggesting that Quetzalcoatlus scavenged like the marabou stork which will scavenge, but is more of a terrestrial predator of small animalsbut then on the carcasses of titanosaur sauropods such as Alamosaurus.
Lawson had found the remains of the giant pterosaur while searching for the bones of this dinosaur, which formed an important part of its ecosystem. InLehman and Langston The significance of mass media the scavenging hypothesis, pointing out that the lower jaw bent so strongly downwards that even when it closed completely a gap of over five centimeters remained between it and the upper jaw, very different from the hooked beaks of specialized scavenging birds.
They suggested that with its long neck vertebrae and long toothless jaws Quetzalcoatlus fed like modern-day skimmerscatching fish during flight while cleaving the waves with its beak. Witton and Naish noted that most azhdarchid remains are found in inland deposits far from seas or other large bodies of water required for skimming.
Additionally, the beak, jaw, and neck anatomy are unlike those of any known skimming animal.
Rather, they concluded that azhdarchids were more likely terrestrial stalkers, similar to modern storksand probably hunted small vertebrates on land or in small streams. Though Quetzalcoatlus, like other pterosaurs, was a quadruped when on the ground, Quetzalcoatlus and other azhdarchids have fore and hind limb proportions more similar to modern running ungulate mammals than to their smaller cousins, implying that they were uniquely suited to a terrestrial lifestyle.
The nature of flight in Quetzalcoatlus and other giant azhdarchids was poorly understood until serious biomechanical studies were conducted in the 21st century. One early experiment by Paul MacCready used practical aerodynamics to test the flight of Quetzalcoatlus.
MacCready constructed a model flying machine or ornithopter with a simple computer functioning as an autopilot. Some researchers have suggested that these animals employed slow, soaring flight, while others have concluded that their flight was fast and dynamic. Henderson argued that it may have been flightless.
Other flight capability estimates have disagreed with Henderson's research, suggesting instead an animal superbly adapted to long-range, extended flight. InMike Habib, a professor of biomechanics at Chatham University, and Mark Witton, a British paleontologist, undertook further investigation into the claims of flightlessness in large pterosaurs.
After factoring wingspan, body weight, and aerodynamics, computer modelling led the two researchers to conclude that Q. Cultural significance[ edit ] Models in South Bank for the Royal Society's th anniversary exhibition.
In Juneseveral life-sized models of Q. The display featured the most accurate pterosaur models constructed at the time; these models took into account the latest evidence based on skeletal and trace fossils from related pterosaurs.
Lawson, who discovered Q. It is on exhibit at the National Air and Space Museum.Function.
The theory “suggests that the message is a bullet, fired from the ‘media gun’ into the viewer's head,’” states the University of Twente. Sep 13, · Before we talk about the significance of Mass Media Research, it is important to discuss the meaning of Mass Media and Research.
Mass Media are defined as media which have their proper program and constitute their own pfmlures.com Meulemann and Jörg Hagenah). Quetzalcoatlus northropi / k ɛ t s əl k oʊ ˈ æ t l ə s / is a pterosaur known from the Late Cretaceous of North America (Maastrichtian stage) and one of the largest-known flying animals of all time.
It is a member of the family Azhdarchidae, a family of advanced toothless pterosaurs with unusually long, stiffened pfmlures.com name comes from the Mesoamerican feathered serpent god, Quetzalcoatl.
News is the primary source of information for the overwhelming number of people in modern mass democracies. Through news coverage, political leaders gain access to the public, providing opportunities to lead the public and set its policy agenda. Presidential news can be thought of as all stories that mention the president or only those in which .
Apr 16, · The messages we receive from the mass media are a constructed reality of what the media is telling us about our world and how we fit into it. The significance of the media has two functions, either positive or negative.
The mass media is a diversified collection of media technologies that reach a large audience via mass communication. The technologies through which this communication takes place include a variety of outlets.
Broadcast media transmit information electronically, via such media as film.