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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

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.
Maliha Rahman

Sexting (Articlebase) Portfolio 1 - 1 views

www.articlesbase.com/...sexting-948679.html

SOCIAL reliability privacy control IT SYSTEMS comm sys IMPACT health education business arts politics ITGS

shared by Maliha Rahman on 08 Dec 09 - Cached
  • 20% of all teens say they have sent nude or semi-nude pictures or videos of themselves.
samaraad

BBC News - Facebook u-turns on phone and address data sharing - 1 views

www.bbc.co.uk/...technology-12214628

security privacy

shared by samaraad on 18 Jan 11 - No Cached
  • samaraad on 18 Jan 11
     
    "Facebook appears to have u-turned on plans to allow external websites to see users' addresses and mobile phone numbers"
laila-hass

Smart Dust - Computerworld - 2 views

www.computerworld.com/...Smart_Dust

sensors IMPACT ITGS 1.7_surveillance 2.3_data_logging 2.3_satellite_comm 1.3_privacy_anonymity

shared by laila-hass on 01 Jun 11 - No Cached
  • Smart dust" devices are tiny wireless microelectromechanical sensors (MEMS) that can detect everything from light to vibrations. Thanks to recent breakthroughs in silicon and fabrication techniques, these "motes" could eventually be the size of a grain of sand, though each would contain sensors, computing circuits, bidirectional wireless communications technology and a power supply. Motes would gather scads of data, run computations and communicate that information using two-way band radio between motes at distances approaching 1,000 feet.
  • The goal for researchers is to get these chips down to 1mm on a side. Current motes are about 5mm, says Kristofer Pister, professor of electrical engineering at UC Berkeley, who's been working with smart dust since 1997.
  • The cost of motes has been dropping steadily. Prices range from $50 to $100 each today, and Pister anticipates that they will fall to $1 within five years.
  • laila-hass on 01 Jun 11
     
    "Smart dust" devices are tiny wireless microelectromechanical sensors (MEMS) that can detect everything from light to vibrations."
  • Nigel Robinson on 06 Jun 11
     
    This is a great article and the smart dust devices have the potential to impact of so many industries and sectors of society. Thanks for sharing.
Jeff Ratliff

Google Dashboard lifts curtain on stored data - 0 views

news.cnet.com/8301-17939_109-10390941-2.html

SOCIAL privacy IT SYSTEMS int systems IMPACT business arts ITGS

shared by Jeff Ratliff on 07 Nov 09 - Cached
  • Jeff Ratliff on 07 Nov 09
     
    Gives users the ability to see what information Google stores about them.
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