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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.
Eunice Vincent

ARPANSA - Mobile Telephones and Health Effects - 0 views

www.arpansa.gov.au/...index.cfm

portfolio2 Criterion C

shared by Eunice Vincent on 13 Feb 10 - Cached
  • Eunice Vincent on 13 Feb 10
     
    There is no clear evidence in the existing scientific literature that the use of mobile telephones poses a long-term public health hazard.
Eunice Vincent

Cellular Telephone Use and Cancer Risk - National Cancer Institute - 2 views

www.cancer.gov/...cellphones

portfolio2 CriterionB

shared by Eunice Vincent on 13 Feb 10 - Cached
  • Cellular telephones emit radiofrequency (RF) energy (radio waves), which is a form of radiation that is under investigation for its effects on the human body (1).
  • RF energy is a form of electromagnetic radiation.
  • Electromagnetic radiation can be divided into two types: Ionizing (high-frequency) and non-ionizing (low-frequency) (2). RF energy is a form of non-ionizing electromagnetic radiation. Ionizing radiation, such as that produced by x-ray machines, can pose a cancer risk at high levels of exposure. However, it is not known whether the non-ionizing radiation emitted by cellular telephones is associated with cancer risk (2).
  • ...2 more annotations...
  • A cellular telephone's main source of RF energy is produced through its antenna. The antenna of a hand-held cellular telephone is in the handset, which is typically held against the side of the head when the telephone is in use. The closer the antenna is to the head, the greater a person's expected exposure to RF energy. The amount of RF energy absorbed by a person decreases significantly with increasing distance between the antenna and the user. The intensity of RF energy emitted by a cellular telephone depends on the level of the signal sent to or from the nearest base station (1).
  • When a call is placed from a cellular telephone, a signal is sent from the antenna of the phone to the nearest base station antenna. The base station routes the call through a switching center, where the call can be transferred to another cellular telephone, another base station, or the local land-line telephone system. The farther a cellular telephone is from the base station antenna, the higher the power level needed to maintain the connection. This distance determines, in part, the amount of RF energy exposure to the user.
  • Eunice Vincent on 13 Feb 10
     
    This fact sheet outlines the available evidence regarding use of cellular/mobile telephones and cancer risk. National Cancer Institute Fact Sheet 3.72
Elvira Russ

Effective Ways for Detecting Phishing S - 0 views

webtoolsandtips.com/...detecting-phishing-scam-emails

Security CriterionD

shared by Elvira Russ on 18 Feb 10 - Cached
  • Elvira Russ on 18 Feb 10
     
    Beginners guide to survive a phishing attempt. These simple methods for Detecting Phishing Scam Emails, will enhance your Internet Security.
Maliha Rahman

Sexting Growing Trend Among Teens (Get Legal public) Portfolio 1 - 0 views

public.getlegal.com/...sexting

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

shared by Maliha Rahman on 08 Dec 09 - Cached
  • ''Sexting'' has lawyers grappling for a new definition of what constitutes a predatory sex offender. In general, the law says any nude or semi-nude photo of someone under the age of 18 constitutes child pornography.
  • A 2008 survey by the National Campaign to Prevent Teen and Unwanted Pregnancy found that 39 percent of teens have sent or posted sexually suggestive messages and 48 percent say they have received such messages. Many parents worry the images could find their way onto the Internet, or even worse, into the possession of actual sexual predators.
  • Hannah Montana star Miley Cyrus also experienced the pitfalls of ''sexting'' when someone hacked into her phone and leaked racy images of her—meant only for her boyfriend—online.
Chalana Perera

Economic Impacts of Cyber-Attacks (CISCO) - 0 views

docs.google.com/viewer

SOCIAL security policies IT SYSTEMS int systems IMPACT business politics ITGS Portfolio3 CriterionC

shared by Chalana Perera on 14 Apr 10 - No Cached
  • Chalana Perera on 14 Apr 10
     
    This PDF is a report that discusses research into the economic impacts of cyber-attack on private, small-scale, large-scale, multinational, local and international corporations as well as government financial institutions.
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