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Chalana Perera

Internet Time and the Reliability of Search Engines | EDUCAUSE - 4 views

www.educause.edu/...153271

ITGS PP int systems reliability equality applications

shared by Chalana Perera on 13 Sep 09 - Cached
  • earch engines are unreliable tools for data collection for research that aims to reconstruct the historical record.
Chalana Perera

BBC - Radio 4 - The Material World 24/10/2002 - 0 views

www.bbc.co.uk/...hematerialworld_20021024.shtml

ITGS PP search engines applications int systems globalization

shared by Chalana Perera on 13 Sep 09 - Cached
  • nternet search engine. But the front pages of such sites as Google, Yahoo and Altavista are hiding hugely complex and refined systems for cataloguing and analysing millions of web pages
  • cheat the engines to come top of the search rankings.
  • find out how they were invented, how they work, and what the future holds for the programs that effectively control our access to the web.
Chalana Perera

The Guts of the Station Finder Map - Inside NPR.org Blog : NPR - 0 views

www.npr.org/...uts_of_the_station_finder.html

ITGS PP applications int systems reliability equality

shared by Chalana Perera on 13 Sep 09 - Cached
  • The system has several underlying database tables, including zip codes, cities and station data. The zip code and city tables, in addition to containing information about the locations, also include the latitude and longitude for the centroid each location.
  • At the core, the system works based on latitudes and longitudes.
  • Once we have the latitude and longitude, we perform a series of calculations based on the Great Circle Calcuation (GCC), which helps us to determine distances on a curved surface (ie. the Earth - and we are assuming that it is not flat). Using the GCC, we look for stations near the latitude and longitude, based on a 100 mile radius from that point. From that list of stations, which is too inclusive, we start our process of narrowing down the results to the actual stations that can be heard.
  • ...1 more annotation...
  • - a web-based service to inform our audience as to which NPR stations are available throughout the country. There are other more sophisticated, more precise ways to identify the station coverage maps which are really overkill for this type of service.
Chalana Perera

BBC NEWS | Technology | Search users 'stop at page three' - 0 views

news.bbc.co.uk/...4900742.stm

ITGS PP applications reliability people

shared by Chalana Perera on 13 Sep 09 - Cached
  • Most people using a search engine expect to find what they are looking for on the first page of results,
  • good results should have "good pages, text rich content, and good links pointing to you".
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