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...New York Times, BBC, and other media outlets generating headlines. A second group of users labeled acquaintances, tend to exhibit reciprocity in their relationships, typical in online social networks =-=[15]-=-. Users in this group appear in the large cluster that falls (roughly) along the line y=x in Figure 2. A third unique group of users is a small cluster around the line x=7000 in Figure 2. A common cha...

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...it has grown quickly to become the third largest region. Asia-Pacific region includes everyone not covered by the top four regions. 4. RELATED WORK AND SUMMARY An earlier examination of Twitter usage =-=[11]-=- has drawn similar inferences in followers and following counts, different classes of users, and symmetricity of relationships. However, our study is broader and improves on their work in several ways...

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...rks to grow in different directions and the large established base of cell phone users are likely to participate in OSNs using mobile devices. Several popular OSNs have been studied recently. A study =-=[12]-=- of Flickr and Yahoo! 360 networks examined path properties (such as diameter), density (ratio of undirected edges to nodes) change over time, and presence of a giant component. One point in common ap...

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...ities. Twitter does not appear to have any visible limits on the number of friends/followers unlike LiveJournal or Orkut. YouTube was studied with an emphasis on characterizing user generated content =-=[5, 7]-=-. Properties of the content, popularity distributions and strategies for handling the resource demands of an OSN that centers around large content were considered. Unlike YouTube, Twitter centers on v...

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...ls of the current user as well as a partial list of users being followed by the current user. During this process the median number of users followed by the previously crawled users, m, was tabulated =-=[14]-=-. To further the crawl the first m users followed by the current user would be added to the set of users to crawl. If the current user followed fewer than m users, all users are added to the set of us...

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... our constrained crawl, an additional dataset of 31,579 users was gathered between February 21–25, 2008, via the Metropolized random walk with backtracking, used for unbiased sampling in P2P networks =-=[19]-=-. Note that this crawl required fewer requests as we considered only one child of each node and the rate limiting was slightly relaxed. Our analysis presents results on all the datasets with compariso...

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...ities. Twitter does not appear to have any visible limits on the number of friends/followers unlike LiveJournal or Orkut. YouTube was studied with an emphasis on characterizing user generated content =-=[5, 7]-=-. Properties of the content, popularity distributions and strategies for handling the resource demands of an OSN that centers around large content were considered. Unlike YouTube, Twitter centers on v...

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...ss objects, numerous social networks along with thousands of helper applications have arisen. Well known ones include Facebook, MySpace, Friendster, Bebo, hi5, and Xanga, each with over forty million =-=[13]-=- registered users. Many applications have been created to use the distribution platform provided by OSNs. For example, popular ∗ Author ordering is reverse alphabetical. Permission to make digital or ...

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...opposed to say, YouTube, where individual videos uploaded are much larger. Individual tweets are limited to 140 characters in Twitter. Twitter began in October 2006 and is written using Ruby on Rails =-=[16]-=-. Our study finds that users from a dozen countries are heavily represented in the user population but significantly less than the U.S. Recently, Twitter has made interesting inroads into novel domain...

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...ecome popular in their own right. A key distinguishing factor of these smaller networks is that they provide a new means of communication. In the case of Twitter [21] it is Short Message Service (SMS =-=[18]-=-), a store and forward best effort delivery system for text messages. In the case of qik, it is streaming video from cell phones. Jaiku [10], another small OSN, allows people to share their “activity ...

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...t exclusively, combining geo-location of users with image uploading and works on various cell phones including Apple’s iPhone. Close to Twitter, a mobile OSN that encourages constant updates is Bliin =-=[3]-=-. Other examples of exclusively mobile social networks include Itsmy and MyGamma. A distinguishing factor of such smaller networks and applications is their ability to deliver the data to interested u...