1. Search and Retrieval in a Virtual World
Prof dr. sc. Nenad Prelog
April 29, 2019

2. Survive is to Learn How to Control Information
During history, man’s survival was based on ability to transfer memory (semantic and procedural) from one generation to another
Humans are the only living being capable of recording, transmitting and storing information which in all other species disappear with physical death of individual
April 29, 2019
Search and Retrieval in a Virtual World

3. How much information (1)
Five exabytes of information is equivalent in size to the information contained in half a million new libraries the size of the Library of Congress print collections
Instant messaging generates five billion messages a day (750GB), or 274 Terabytes a year
About 31 billion s are sent daily, or 667,000 terabytes of new information each year worldwide
April 29, 2019
Search and Retrieval in a Virtual World

4. How much information (2)
Approximately 240 terabytes of unique data are recorded on printed media worldwide each year,
There are over 2700 photographs taken every second, adding up to over 80 billion new images a year
Almost 800 MB of recorded information is produced per person each year. It would take about 30 feet of books to store the equivalent of 800 MB of information on paper
April 29, 2019
Search and Retrieval in a Virtual World

5. Search and Retrieval in a Virtual World
April 29, 2019
Search and Retrieval in a Virtual World

6. Search and Retrieval in a Virtual World
Google
April 29, 2019
Search and Retrieval in a Virtual World

7. In Search for Lost Information
Well known problems with preservation of integrity of information carrier (from slow decomposition of paper to the degradation of magnetic tapes; obsolescence of operation systems and application software required for understanding information stored on nonconventional media) is only one side of the problem
Integrity of content is connected with integrity of context, environment, location, organization of information, former links to other information pieces etc.
April 29, 2019
Search and Retrieval in a Virtual World

8. Search and Retrieval in a Virtual World
Save our Information…
Control is lost, nobody is really trying to store and keep searchable everything what is created and posted on Internet
Internet Archive
Library of Congress – Digital Collections
World Digital Library
Project Gutenberg
April 29, 2019
Search and Retrieval in a Virtual World

9. Search and Retrieval in a Virtual World
Internet Archive
April 29, 2019
Search and Retrieval in a Virtual World

10. Library of Congress – Digital Collections
April 29, 2019
Search and Retrieval in a Virtual World

11. Search and Retrieval in a Virtual World
World Digital Library
April 29, 2019
Search and Retrieval in a Virtual World

12. Search and Retrieval in a Virtual World
Project Gutenberg
April 29, 2019
Search and Retrieval in a Virtual World

13. Preserve Croatian Digital Heritage
Digitalization of archives and libraries is mixed with preservation of digital documents
There is not any systematic approach in this direction
Division of tasks and labor, (producers, distributors, other intermediators, users)
April 29, 2019
Search and Retrieval in a Virtual World

14. Search and Retrieval in a Virtual World
European Library
April 29, 2019
Search and Retrieval in a Virtual World

15. National and University Library (Zagreb)
April 29, 2019
Search and Retrieval in a Virtual World

16. Search and Retrieval in a Virtual World
We Live in Two Worlds
We think that we are present only in a one world
Rules of behavior are different
Most of relevant information is stored in a virtual world, this is the place we have to look for it
April 29, 2019
Search and Retrieval in a Virtual World

17. Search and Retrieval in a Virtual World
Real vs. Virtual
Physical entities (documents)
Classification system or/and keywords; rule based, textual description of nontextual content
IT used for speeding of operations
Selection of titles, abstracts reading, looking for location
Lack of communication and misunderstanding between search and retrieval process
Poor interaction
Content on nonconventional media
Free text search, links, evidence of former search
Search technology, impossible without computer
Browsing, content is one click away, hyperlinks
To much information, broadening of search
User is the king, tracing the footsteps, online behavior
April 29, 2019
Search and Retrieval in a Virtual World

18. Search and Retrieval in a Virtual World
Real vs. Virtual (2)
Small part of information production, evaluated and formal publication dominate
Library, documentation services, tradition and experience
Documents (and their distribution) have price
Slow access to information, documents are late
Authorship, signatures, responsibility
New information (less than 10 years old dominate)
Newspapers and periodicals as archives, search engines
Everything is free, but search has its price
Permanent update, answer is only a click away
Shared responsibility, hard to establish liability
April 29, 2019
Search and Retrieval in a Virtual World

19. In Search for Information We Reveal Ourselves
Less and less search, more and more we and our behavior are source for information retrieval
We are living in both worlds, “normal” and virtual  we need harmony!
April 29, 2019
Search and Retrieval in a Virtual World