A podcast is a series of digital media files (either audio or video) that are released episodically and downloaded through web syndication. The mode of delivery is what differentiates podcasts from other ways of accessing media files over the Internet, such as simple download or streamed webcasts: special client software applications known as podcatchers (like iTunes, Zune, Juice, and Winamp) are used to automatically identify and download new files in the series when they are released by accessing a centrally-maintained web feed that lists all files associated with the series.
New files can thus be downloaded automatically by the podcatcher and stored locally on the user's computer or other device for offline use, giving simpler access to episodic content.
Most dictionary definitions of a podcast fall into one of two camps as of September 2009. One set focuses on the "on-demand" nature of podcasts. Another set requires the automatic or syndication posting. There are problems with both definitions. The first is too open. Under such a definition, a paid music download could technically be a podcast.
Most audiences would disagree. The second is very limiting, in comparison. It does not allow for manual downloads. Researchers at the Center for Journalism and Communication Research at the University of Texas at Austin are proposing a four-part definition of a podcast: A podcast is a digital audio or video file that is episodic; downloadable; program-driven, mainly with a host and/or theme; and convenient, usually via an automated feed with computer software.
The term podcast refers to an ongoing series or episodes of a particular program.[1] A podcaster is the person who creates the content.
viernes, 23 de octubre de 2009
is a free website social network created by Mark Zuckerberg. Originally a site for students of Harvard University, but now is open to anyone with an email address. Users can participate in one or more social networks in relation to their academic status, place of work or geographic region. It has received much attention in the blogosphere and the media to become a platform on which third parties can develop applications and do business from the social network. However, there are concerns about possible business model, since the results in advertising have proved very poor. [Citation needed] In mid-2007 launched its version in French, German and Spanish to boost its expansion outside the United States because its users are concentrated in the U.S., Canada and Britain.
is a free microblogging service that allows users to send micro-text-based entries, called "tweets," of a maximum length of 140 characters. The sending of these messages can be performed either by the Twitter website, and via SMS (short message service) from a mobile phone, from instant messaging programs, or even from any third party applications, such as Twitterrific, Tweetie, Facebook, Twinkle, TweetDeck-Tweetboard or English. These updates are displayed in the user profile page, and are also immediately sent to other users who have chosen the option of receiving them. These users can restrict them to send these messages only to members of his circle of friends or allow access to all users, which is the default. Users can receive updates from the Twitter page, via instant messaging, SMS, RSS, and email. Receiving updates via SMS is not available in all countries and to request the service is necessary to send a confirmation code to an overseas number.
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