Wednesday, December 14, 2011

The Dangers of Radio Waves

!9#: The Dangers of Radio Waves

Since the advent of cellphones in the 1990s, communication has become a lot easier and portable. In fact it has become impossible to imagine a world without them. Business transactions have increased exponentially in decision-making now takes place in a much quicker pace. In Africa, cellular technology has become the primary means of communication as telephone companies no longer have to spend billions of dollars building up telecommunication infrastructure.

Radio frequencies and magnetic fields have been controversial topics since the 1960s and 70s, and with the introduction of cellular phones, the controversy has exacerbated. As in every debate, there are two schools of thought surrounding the impact of radio waves and the danger they pose. On the one side, there are those who believe that radio frequencies have little effect on consumers and the environment at large. On the other side, there are those who believe that we are in serious danger from radio waves and the telecommunication companies that dupe us into believing that we are safe.

Radio frequencies or radio waves, as they are more commonly known, are emitted by wireless and other electronic devices. They are not a new occurrence in the modern world. In fact, apart from natural occurrences, radio waves have been around since radio and television. Basically anything that has an antenna or a transmitter emits radio waves. The rate at which the body absorbs radio waves is measured as the Specific Absorption Rate (SAR).

Controversy surrounding cell phone radiation is focused on whether radio frequencies emitted from cellphones are safe for humans and the environment, or whether we are all put at risk by the continuing omission of these waves as well as electromagnetic fields. When radio frequencies are high enough, they can break down the tissue in the human body and can interfere with the DNA. However, it is claimed that emissions from cellphones are so small that they pose no danger. This has been the mantra of the FCC for many years. There has been much confusion and concern recently as the same organization now claims that further research is needed to determine the effects of radio frequencies, as well as whether they are dangerous to humans.

Complaints have surfaced in the United States and other countries like South Africa where base stations are located in urban areas and even built in gardens where agreement is reached between cellphone networks and home owners. People living in close proximity to base stations have complained of headaches and other health problems. Home owner associations and health researchers have claimed that living too close to base stations or heavy use of cellphones may instigate brain tumors and cancers.

With no official conclusions drawn on the dangers of cellphones, and with more people complaining about the effects, one has to ask the following questions; how dangerous is radio frequencies and what are the risks to human health and the environment? Can constant exposure to radio waves cause free radicals to occur and if so, is there any way to protect ourselves? Are we slowly killing ourselves with the pollution of modern technology? Makes you think, doesn't it?


The Dangers of Radio Waves

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Monday, December 5, 2011

How Do E-Book Readers Compare With Real Books?

!9#: How Do E-Book Readers Compare With Real Books?

The popularity of electronic book readers increased enormously during the course of 2009. The launch of the Amazon Kindle 2.0 and the large format Kindle DX, followed up by competing readers like the Nook from Barnes and Noble and Sony's Daily Edition reader in the latter part of the year, put both readers and e-books firmly on the map. By early 2010 there was a large selection of e-book readers for potential customers to choose from - including the Apple iPad, which includes the ability to read e-books amongst its many options.

Now that e-readers have been taken up by "early adopters", the next wave of potential customers will come from more traditional book readers. Although it's possible to find many (very many) reviews of e-book readers on the internet, and increasingly in magazines and newspapers, the current crop of customers are probably more interested to learn how e-readers stack up against "real" books rather than how they compare with other e-book readers. They want to know if they will miss the feel of a traditional book.

The good news is that the e-ink display technology used in modern e-readers is really very good. The reading experience is nothing like reading on a computer screen - it's much closer to reading text printed on paper.

When you "turn the page" of an e-book, the reader display goes dark very briefly. However, these page turns are much faster now than they were even twelve months ago. After a couple of reading sessions you won't notice them at all. In fact, when you're enjoying a good book, you will be completely unaware of the fact that you're reading it on an electronic device rather than leafing through the pages of a more traditional paper edition.

Most e-readers are very easy to use. A recent survey of American e-book reader owners found that 80% of them actually preferred using their electronic readers to reading a conventional book. That's a fairly strong endorsement - but considering how easy these readers are to use one-handed, on a crowded bus or train, or sitting propped up in bed - it's possibly less surprising than it appears at first glance.

Apart from the numerous advantages of the readers themselves, the e-books to read on them are cheaper than paper books. They don't use paper, ink or bindings and there are no (or very small) delivery fees. They are also, for exactly the same reasons, much more environmentally friendly than conventional books - even when the materials and energy used in the production and delivery of the readers themselves are taken into account.

E-book readers, all things considered, have a lot to recommend them. They are the future of reading and, if you read a book a week or so, could well be quite a bit cheaper than traditional books. At the end of the day, it's a matter of personal preference - but an electronic reader may well be an option which you should give some thought to.


How Do E-Book Readers Compare With Real Books?

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