Posted in rdf0809 by erikatxu on julio 13, 2010

Sare sozialak egitura sozialak dira, non gizabanako (ez soilik pertsonak, baizik eta elkarteak, taldeak…) ezberdinak erlazionatuta dauden eta komunikazioa mantentzen duten (infromazioa transmititu eta jasotzen dute). Komunikazio elkartze honek gizartea batzeako era bat da, momendu guztian konektatuta egoteko modu bat.

Mundu mailako sare sozial nagusiak honexek dira: Hi5, MySpace, Facebook, Tuenti, Twitter eta Orkut. Sare sozialak helburu ezberdinak izan ahal dituzte,hau da, arlo ezberdinetan oinarritzen direla; eta horrela gertatzen da.

  • MySpace: Web orrialde antzeko bat ematen dizu. Honetan bideoak, argazkiak eta bloga daude.
  • Facebook: Unibertsitatean dauden ikasleentzako sare-sozial moduan hasi zen, baina mundu osora zabaldu da.
  • Flickr: Rgazkilaritza maite dutenentzako sare soziala.
  • Weblife.es: Idazle eta poeten sare-soziala.

Baina aztertzera goazena Twitter da. Sare sozial hau 2006ko martxoan hasi zen funtzionatzen eta garai hartan mezuak denbora errealean bidaltzen oinarritzen zen. Gaur egun ere, abantailarik nagusiena hori da, ekintzak gertatzen ari diren aldi berean twitter-en bidez komunikatzeko aukera dagoela. Sinpletasuna eta zehaztasuna dira ezaugarri garrantzitsuenetakoak. Bidali ahal diren mezuak hitz-muga daukate eta horrek informazioaren edukia kontzentratua egotea eskatzen du. Honetaz gain, erraztasunak ematen ditu: mezuak gailu eta modu ezberdinen bidez bidali daitezke: mugikor, web, mugikorreko internet, eta beste sistema batzuen bidez (API erabiliz).

Twitter-ek erronka berriak ditu eta hauei aurre eginez mobiletik erabiltzeko twitter-a sortu du, betiere erabiltzaileek eskatzen dutena kontutan hartuz. Azken finean, sare sozialak gizarteak dituen beharretara moldatzen dira.Horrela sare sozialak erabiltzaileentzako lagungrriak bihurtzen dira.

Twitter-en web orrialdetik ateratako aipua:

Dicho eso, la gente parece estar siempre pidiendo más formas de compartir su opinión con otros y organizarse ellos mismos y sus actualizaciones en grupos. Estamos prestando atención a estas peticiones.


  • Boyd, Dana M. (School of Information University of California-Berkeley)  eta Ellison, Nicole B. (Department of Telecommunication, Information Studies, and Media Michigan State University). (2007).Social Network Sites: Definition, History, and Scholarship. http://jcmc.indiana.edu/vol13/issue1/boyd.ellison.html


Posted in rdf0809 by erikatxu on julio 13, 2010

CiteULike is a free service to help internet users to store, organise and share the scholarly papers they are reading. When the user see a paper on the web that interests him, ge can click one button and have it added to his personal library. CiteULike automatically extracts the citation details, so there’s no need to type them in himself. It all works from within a web browser so there’s no need to install any software. Because the library is stored on the server, it can be accessed from any computer with an Internet connection.

It was created in November 2004 and further developed in December 2006. The site is based in the UK. The service is free and is run independently of any particular publisher with a liberal privacy policy.

In the style of other popular social bookmarking sites such as del.icio.us it allows users to bookmark and “tag” URIs with personal metadata using a Web browser. CiteULike normalizes bookmarks before adding them to its database, which means it calculates whether each URI bookmarked identifies an identical publication added by another user, with an equivalent URI.

CiteULike is based on the principle of social bookmarking and is aimed to promote and to develop the sharing of scientific references amongst researchers. In the same way that it is possible to catalog web pages (with Furl and del.icio.us) or photographs (with Flickr), scientists can share information on academic papers with specific tools developed for that purpose.


Citeulike FAQ http://www.citeulike.org/faq/faq.adp

Citeulike in Wikipedia http://en.wikipedia.org/wiki/CiteULike

Differences between e-books and printed books

Posted in edición by erikatxu on julio 12, 2010

The development of computers has undoubtedly made an impact on many aspects of our life. In the field of literature, the option to display text on screens has raised an important debate: should we publish books on paper or in an electronic format?

E-books offer a variety of advantages and disadvantages in contrast to printed books:


  1. A single e-reader device can store hundreds of books in a portable format. In the case of students, it would avoid the need to carry around heavy textbooks which often cause back pain.
  2. LCD screens emit different amounts of light, which make e-books readable both in the darkness and illuminated environments.
  3. Libraries or bookshops are not always accesible nearby or open at any hour during the day. With an Internet connection, e-books are acquirable immediately anytime, anywhere.
  4. Using stylus pens on the touchscreen, it’s possible to highlight words and add annotations which can later be erased without altering the original appearance of the page.
  5. Electronic text allows for multimedia content to be embedded. Keyword searching and cross-referencing through hyperlinks would improve the utilization of dictionaries.
  6. Self-publishing becomes easier for autonomous authors. Publishers would benefit from the reduction of production costs as well, which would in turn lessen the prices for the readers.
  7. On the ecological side, paper consumption would decrease.
  8. Electronic text can be converted into computer-generated audiobooks. The wider the selection of e-books, the more material made available for the visually impaired or for those who want to listen to the pronunciation of other languages.


  1. Not all printed titles are available as e-books.
  2. E-readers run off batteries, which will consume after a limited amount of time.
  3. E-readers can break down and are more fragile than paper books.
  4. The downloadable format of e-books make them easier to copy and distribute illegally.
  5. Many people do not understand how to or are not willing to deal with electronic devices.
  6. Overall, the familiar feeling of owning a tangible book, where one can leaf through the pages and leave their personal traces during the process, is lost in e-readers.

Changing a tradition is not simple, and it does not seem likely that paper books will ever disappear completely. Still, with the rapid digital revolution our society is going through, it is not difficult to assume that e-books will sooner or later gain a popular status.


Autoretza digitala (copyleft)

Posted in edición by erikatxu on julio 12, 2010

Historia osoan zehar, batez ere inprentaren etorreratik, argi eta garbi ikusi izan da beti  nor zen obra baten autorea eta nork zeuzkan horren gaineko eskubide guztiak. Interneten etorrerarekin ordea, autoreen eskubidea beraiek idatzitako obren gainean zalantzatan jarri da, liburuen informazio guztia internetera heldu da eta bertan erraz kopiatu eta banatu daiteke inolako baimenik gabe.

Batzuk, jabetza intelektualaren kontzeptu honen aurka ageri dira eta “copyleft” delako lizentziaren sorrera bultzatu dute. Copyleft, Copyrightaren kontzeptuaren aurkako bezala jaio zen eta talde lanaren kontzeptuak bultzatzen ditu hala nola jendearen partaidetza handitu… etab.

Honez gain, copyleft lizentziapean argitaratua izan dena, edonoren esku dago eta bakoitzak bere erara manipulatu dezake baina, inork ezingo luke beste batek egindako lanetik probetxurik atera, izan ere, norbaitek material honetatik baliatuz beste bat egin edota publikatuko balu, copyleft kondizio berdinetan egin beharko litzateke.


Tim Berners-Lee

Posted in edición by erikatxu on julio 12, 2010

“Sir Timothy John “Tim” Berners-Lee is a British engineer and computer scientist and MIT professor credited with inventing the World Wide Web, making the first proposal for it in March 1989. On 25 December 1990, with the help of Robert Cailliau and a young student staff at CERN, he implemented the first successful communication between an HTTP client and server via the Internet. However, the general ideas for the Internet were outlined, also the technological aspect, earlier than Berner-Lee’s technological proposal. In 2007, he was ranked Joint First, alongside Albert Hofmann, in The Telegraph’s list of 100 greatest living geniuses. Berners-Lee is the director of the World Wide Web Consortium (W3C), which oversees the Web’s continued development. He is also the founder of the World Wide Web Foundation, and is a senior researcher and holder of the 3Com Founders Chair at the MIT Computer Science and Artificial Intelligence Laboratory (CSAIL). He is a director of The Web Science Research Initiative (WSRI), and a member of the advisory board of the MIT Center for Collective Intelligence. In April 2009, he was elected as a member of the United States National Academy of Sciences, based in Washington, D.C.
He has several awards:
• Honorary from the Open University as Doctor of the University.
• Computer History Museum’s Fellow Award, for his seminal contributions to the development of the World Wide Web.
• He was named as the first recipient of Finland’s Millennium Technology Prize, for inventing the World Wide Web. The cash prize, worth one million euros (about £892,000, or US$1.3 million, as of May 2009), was awarded on 15 June, in Helsinki, Finland, by the President of the Republic of Finland, Tarja Halonen.
• He was awarded the rank of Knight Commander (the second-highest rank in the Order of the British Empire) by Queen Elizabeth II, as part of the 2004 New Year’s Honours, and was invested on 16 July 2004.”


Cascading Style Sheets

Posted in edición by erikatxu on julio 12, 2010

The Cascading Style Sheets, commonly known as CSS, is a style sheet language used to describe the presentation semantics of a document written in a markup language, specially webpages written in XHTML and HTML though it can be applied to any XML file. More easily explained, it is simply used for adding style to documents. HTML did not intend to contain tags for formatting a document, but to define the content of a document. When tags were added it started a problem for web developers. Development of large web sites became a long and expensive process. CSS was created to solve this problem. Finally In HTML 4.0, all formatting could be stored in a separate CSS file, and all browsers support CSS nowadays. Among the advantages, we can find the flexibility of the programming, the separation of content from presentation, the site-wide consistency, the open bandwidth which increases speed and the easy page reformatting. Reources: http://en.wikipedia.org/wiki/Cascading_Style_Sheets http://www.w3.org/Style/CSS/ http://www.w3schools.com/css/ http://www.csszengarden.com/