Codex on the Flight of Birds of a kite as seeking a wind current. When the winds are high, one will see the bird very high in the sky, but when the winds are low, the bird stays closer to the ground. Leonardo describes how a bird rests in the air, after flapping its wings to gain altitude, by gliding downward to the ground. Folio 6 contains multiple diagrams of birds flying and their bone structure, and all of the commentary is on flight and how birds fly the way that they do. Leonardo starts off by describing how a bird ascends or descends in different
Twitter usage on December 30, 2008, that Israel would be the first government to hold a worldwide press conference via Twitter to take questions from the public about the war against Hamas in Gaza. Dr. Chao Guo and Dr. Gregory D. Saxton have conducted a study of how nonprofit organizations use Twitter in their public relations campaigns. “Tweeting Social Change: How Social Media Are Changing Nonprofit Advocacy (2014)” has supported earlier studies that tweets sent out by nonprofit organizations fall into three categories of information, community, and action. Their sample included 188 “Civil Rights and Advocacy” organizations, and they used both quantitative