Friday, 21 September 2012

Wi-Fi: in Schools

Wi-Fi is short for Wireless Fidelity and is a particular type of wireless local area network (WLAN) - i.e., you do not need to plug your computer into a phone network via a cable. There are many types of WLAN but all of them allow user two or more computers to form a network using radio frequency (RF) signals. They allow users to access and share data, applications, internet access or other network resources in the same way as wired networks (cable) systems.


Recently many schools have installed a Wi-Fi system in the school areas in a wide range of educational institute from primary to higher education surprisingly even students are enable to surf the Web in the yellow school buses on their way to school. Wireless networks offer great benefits for schools for example, teachers are able to use restricted school physical space more effectively by using their laptop connected Wi-Fi network beyond the school. Wireless networks can support pupils and the wider community in networking with each other and with access to the internet.
 

Unfortunately, schools seem to have overlooked one important fact that there are potential health risks linked to Wi-Fi. Dr. Riina Bray, an environmental health specialist at Women's College Hospital in Toronto, assert that two or three of her patients every week suffer from ailments related to high- radio frequency waves (RF); Wi-Fi routers, cellphone and other radio-frequency sources. Moreover Bray found that hypersensitivity patients have increased about 12 times compared with five years ago. Typically her patients report to her that the symptoms lessen or disappear when they get away from RF sources.


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