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The SI prefixes provide a convenient way to apply a decimal scale factor to a unit of measurement. For example, 1000 meters is a kilometer (km). However, the SI prefixes are frequently misused to apply a binary scale factor that happens to be close to a decimal factor. For example, 1024 order cheap cialis online [more...]

What is the future of the Internet? If you were to put any stock in my predictions of the future, we’d all have flying cars and robot butlers by now. So far be it from me to make any guesses what the Internet will look like years or decades from now. But when some of [more...]

This is a guest post by moa. A passenger automobile vehicle, i.e. a car, is usually used for transporting people although small amounts of cargo can also be carried; specialized cars are used for racing and a myriad of other uses. The primary components can be broadly divided into groups belonging to the body, the [more...]

When Steve Jobs launched the iPhone 4, he made a big point about its display, which Apple calls the “retina display”. Jobs claimed that its 326 pixels per inch corresponds to the limit of perception of the human retina. When viewed about a foot away, Jobs said, you can no longer see the individual pixels. [more...]

In the 1940s, 50s and 60s, Popular Science Magazine ran a column called I’d like to see them make?. The magazine invited readers to write in with suggestions on the gadgets, tools and innovations they would like to see invented to make their lives a little easier. It was a popular item, and published suggestions [more...]

When Apple announced the details of the iPad, it was clear that a new type of computer was being produced — something like a netbook and yet something like an oversized iPhone without the telephone capabilities or an iPod Touch on steroids. My word for the device is “netpad,” but only time will tell what [more...]

When a new device incorporates the functionality of two or more earlier devices, it is a converged device. The development of a convergence device occurs when miniaturization or economics makes it possible to cram extra functionality into an existing device, or when technology common to two devices is factored out to make a more efficient [more...]

If you’ve ever tuned across the AM radio band late at night, chances are you’ve heard radio stations from far away that you can’t hear during the daytime. What’s happening is that the radio signals are bouncing off the ionosphere, an area in the upper reaches of the atmosphere where ultraviolet light from the sun [more...]

Many television viewers are making the switch these days from the old-fashioned system — the basic technology for analog TV has been around since World War II days — to modern digital. Those who have are finding that they can get much clearer pictures than is possible with analog TV. Indeed, the ability to broadcast [more...]

The good news is that old televisions, the analog kind, will still work after the switch to digital TV in the United States. The bad news — and this will be true for some people, but not for others — is that there may not be any stations they will be able to receive. The [more...]