Oracle's VM VirtualBox is a powerful, free, and open-source virtualization tool—but you'll have to do some tinkering to make it work for you.

(author unknown)

If your Facebook status update reads, "Leaving for France!" you're not just gloating about your trip. You're letting everyone know that your house will be empty for about 10 days. Bad idea.

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Debugging is incredibly powerful, but setting it up for Drupal in Eclipse can be a pain. How about a step-by-step?

Coming from a .NET background, I love the Visual Studio debugger. I can stop code execution at any time and look at the values of any of the variables. There's none of this dumping huge arrays to the web page and examining the output. I've wanted to set up a debugger for Drupal with Eclipse for a long time now, and setup instructions vary wildly. Here's my take on it.

You will need:

read more

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You live your life at 2.4GHz. Your router, your cordless phone, your Bluetooth earpiece, your baby monitor and your garage opener all love and live on this radio frequency, and no others. Why? The answer is in your kitchen.

What We're Talking About

Before we charge too far ahead here, let's run over the basics. Your house or apartment, or the coffee shop you're sitting in now, is saturated with radio waves. Inconceivable numbers of them, in fact, vibrating forth from radio stations, TV stations, cellular towers, and the universe itself, into the space you inhabit. You're being bombarded, constantly, with electromagnetic waves of all kind of frequencies, many of which have been encoded with specific information, whether it be a voice, a tone, or digital data. Hell, maybe even these very words.

On top of that, you're surrounded by waves of your own creation. Inside your home are a dozen tiny little radio stations: your router, your cordless phone, your garage door opener. Anything you own that's wireless, more or less. Friggin' radio waves: they're everywhere.

Really, it's odd that your cordless phone even has that 2.4GHz sticker. To your average, not-so-technically-inclined shopper, it's a number that means A) nothing, or B) something, but the wrong thing. ("2.4GHz? That's faster than my computer!")

What that number actually signifies is broadcast frequency, or the frequency of the waves that the phone's base station sends to its handset. That's it. In fact, the hertz itself just just a unit for frequency in any context: it's the number of times that something happens over the course of a second. In wireless communications, it refers to wave oscillation. In computers, it refers to processor clock rates. For TVs, the rate at which the screen refreshes; for me, clapping in front of my computer right now, it's the rate at which I'm doing so. One hertz, slow clap.

The question, then, is why so many of your gadgets operate at 2.4GHz, instead of the ~2,399,999,999 whole number frequencies below it, or any number above it. It seems almost controlled, or guided. It seems, maybe, a bit arbitrary. It seems, well, regulated.

A glance at FCC regulations confirms any suspicions. A band of frequencies clustered around 2.4GHz has been designated, along with a handful of others, as the Industrial, Scientific, and Medical radio bands. "A lot of the unlicensed stuff—for example Wi-Fi—is on the 2.4GHz or the 900Mhz frequencies—the ISM bands. You don't need a license to operate on them." That's Ira Kelpz, Deputy Chief, Office of Engineering and Technology at the Federal Communications Commission, explaining precisely why these ISM bands are attractive to gadget makers: They're free to use. If routers and cordless phones and whatever else are relegated to a small band 2.4GHz, then their radio waves won't interfere with, say, cellphones operating at 1.9GHz, or AM radio, which broadcasts between 535 kHz and 1.7 MHz. The ISM is, in effect, a ghetto for unlicensed wireless transmission, recommended first by a quiet little agency in a Swiss office of the UN, called the ITU, then formalized, modified and codified for practical use by the governments of the world, including, of course, our own FCC.

The current ISM standards were established in 1985, and just in time. Our phones were one the cusp of losing their cords, and in the near future, broadband internet connections would come into existence and become magically wireless. All these gadgets needed frequencies that didn't require licenses, but which were nestled between the ones that did. Frequencies that weren't so high that they sacrificed broadcast penetration (through walls, for example), but weren't so low that they required foot-long antennae. In short, they needed the ISM bands. So they took them.

Why 2.4?

Now, there are many, many frequencies that qualify as "unlicensed," but only a handful get used in our phones, routers, and walkie talkies.

In the case of something like phones, which are sold paired with a specific base station, choosing the right unlicensed frequency is a pretty straightforward calculation: A 900MHz system will be more easily able to broadcast through a multi-floor house, but a 2.4 GHz system will have a longer range (if unobstructed) and generally requires a smaller antenna, which keeps the phone's size in check.

Wi-Fi routers started as proprietary, paired systems operating on all manner of frequencies, only settling on a standard—5GHz—with the codification of 802.11a. Then the Institute of Electrical and Electronics Engineers agreed that 2.4GHz, with its wide channel selection and range/penetration/cost potential, was a safer bet. Today, some Wireless N routers can operate on both 2.4GHz and 5GHz bands concurrently. Routers could function just as well at 2.3 or 2.5GHz, but they're not allowed. It's the rules. The 2.4GHz band, which runs from about 2400 to 2483.5Mhz, is where routers have to live.

For this, they can thank the microwave.

Microwave ovens heat food by blasting it with, literally, microwaves. (It bears mentioning that in terms of electromagnetic waves, microwaves, the wavelengths of which range from a millimeter all the way up to a meter, aren't particularly "micro".) At certain frequencies, such waves cause something call Dielectric Heating in water and fat, while passing straight through other materials, like plastic or glass, without exciting them much at all. (Metal, on the other hand, gets too excited.) For a full explanation of how dielectric heating works, click here, but for the purposes of this article, just know this: Only certain materials are susceptible, and only when bombarded with waves of a certain frequency and power. One of those frequencies is 915MHz. Others fall at 5.8 GHz and 24GHz. But the one that proved to be both effective and relatively cheap to achieve was 2.45GHz. That's the frequency emitted by your microwave, right there in the kitchen.

So, when the FCC got around to establish just which frequencies unlicensed gadgets could broadcast on, they had a lot of things to think about. First, they had to consider which frequencies were already in use by stuff like radio and TV. Those would be off-limits. Then, of the remaining, usable, unallocated frequencies, they sought out the ones that were already being used by existing equipment. One thing they noticed? Microwaves were popular! They'd been around commercially since 1947. And generally, they operated at a specific frequency: 2.45GHz. Despite heavy shielding, microwave ovens' powerful emissions could sometimes interfere with neighboring frequencies, so it was decided that they should be given a few megahertz of space in both directions. And so the 2400 to 2483.5Mhz ISM band was born.

That these free-for-all frequencies could one day get overcrowded was always a possibility. But the FCC's primary concern is minding the frequencies it licenses; everyone working in ISM frequencies, then, must fend for themselves. And they do! Your microwave and your router might emit waves in the same frequency range, and this might screw with your router's connectivity a little bit. Generally, though, the router companies have been able to minimize interference by boosting signal strength and writing more intelligent firmware. And outward emissions of microwaves are at least supposed to be minimized. (That perforated metal shield in the glass door of your microwave? It's a shield—the holes in it are smaller than the physical width of the 2.4GHz wave.) In the end, things work.

That's not to say that the 2.4GHz band isn't getting crowded. Many routers operate at least in part on the 5GHz band, and a quick survey of your local Best Buy will find wireless phones at 900MHz, 1.9GHz and 5GHz. But the King of Frequency mountain, the band loved by billions of wireless connections around the world, be they Bluetooth, Wi-Fi, or nonstandard RF remotes, is my band, your band, our band, 2.4. And all because we wanted to cook our food a little faster.

Original art by guest artist Chris McVeigh (AKA powerpig). You can catch all his work at flickr.com/powerpig, and follow him on Twitter. (@Actionfigured)

Send an email to John Herrman, the author of this post, at jherrman@gizmodo.com.

Gizmodo is the world’s most fun technology website, focused on gadgets and how they make our lives better, worse, and more absurd.

John Herrman122101297793786200571312428629511921561301059120888883963369147167866178865879411485696150848310966709213056943402876436058620903961058847640812822188111481838614079471799083823671015464345732276932790991910435459248383307920415310729431935166524617934498681470249296013264655029005824805581177851692

Whether you seek out cutting-edge tech gear or keep to a strict budget, the tech industry has ways to nickel-and-dime you out of your hard-earned cash. Here’s how to fight back.



Business - Technology - Shopping - Precision Cutting - Sports(author unknown)

Hey all, firstly let's start off with the good old: "I'm new to drupal" trying to struggle my way into better understanding.

At the moment I'm doing a bit of custom development, on one side in drupal and on the other side in plain old PHP. Now I found the versioning system in drupal a handy tool so wondered if I could place my regular PHP in a drupal page. A lot of the things I'm doing does work but there's one page with a HTML form using POST that writes to the database which doesn't work.

So in short my question is: what's considered best practice for writing PHP in pages and where should I draw the line, and/or, is this line movable? ;)

Drupal DojoOno04437889819681493070

Google said the Texas attorney general's office is conducting an antitrust review of the Web giant's core search-engine business, another sign of growing government scrutiny of the company.(author unknown)

Google Wave may not have lasted long as an official web app, but the search giant announced today that it intends to use the existing code to design a fully functional application that can be hosted by anyone who wants it. The service will lose its integration with Gmail, but will still give active Wave participants a place to use and modify new and existing Wave’s after the service shuts down at the end of the year.

In many ways Wave might stand a better chance of reaching its full potential as a community open source project than as a neglected Google product. At the very least it takes the sting away from those who used the service extensively before they found out it was being given the axe.

Image Credit: Lifehacker

Justin Kerr1807878838553416617209576640923529921786019572666991493629190812822188111481838602063277674289775507110885328464514793490191199171062917284509608121518232731520

Consumer Watchdog lampoons Google's CEO in a mega-ad questioning the search giant's privacy policies.



Google - Consumer Watchdog - Privacy - Search - Search Engines(author unknown)

The Google algorithm ranks high among the world's best-kept secrets. It involves a complex formula, the patented PageRank system and some pretty picky spiders. (author unknown)0418419925037042483004514714066452243760149294377063643259180427519328438475706003114517259122019052108977734710732036221107538111453033089303212610413956583914

A recent survey indicates that the 9-5 workday and the 5-day workweek are both dead as workers no longer know when to disconnect and walk away.



Workweek - United States - Labor - Social Sciences - Arts(author unknown)1726818317867356899714970900819589394719

A consumer rights group has created a cartoon showing Google CEO Schmidt as an child-baiting ice cream truck driver and put it on a billboard in Times Square. Who's being evil here?



Google - Times Square - Consumer Watchdog - Ice cream - Eric E. Schmidt(author unknown)

Organizers



People - Business - Las Vegas Nevada - DEFCON - Health(author unknown)05025564784149869191

Federal prosecutors this week charged nine former Sprint employees with fraud and aggravated identity theft after learning they had cloned customer cell phone numbers to make $15 million worth of calls. According to the complaint from federal prosecutors, the individuals who have been charged worked at Sprint stores in the Bronx, Bergen, N.J., and Tampa, Fla., and used company computers to get confidential information about thousands of customers. The data was used to create the so-called 'clone' cell phones. Of the $15 million worth of calls, a large percentage of them were international calls, said prosecutors.Joan Goodchild

Secunia has updated its Personal Software Inspector (PSI) with the ability to silently download and apply patches from multiple vendors soon after their release. PSI 2.0 is now available in an open beta test,Jeremy Kirk

Want to revisit your favorite Internet-radio memories? Here’s how to record streaming audio on your PC.



Internet radio - Streaming media - Arts - Radio - Music(author unknown)1170768618983584162203535984233361092120

When you need to get a better picture of your Wi-Fi environment, consider turning to the free, open source, inSSIDer program.



Open source - Wi-Fi - Python - Programming - Modules(author unknown)11523908949793357285

Fake antivirus programs appear to be adopting some of the money-raising tactics of more threatening ransom malware, security company Fortinet’s latest threat report has found.John E Dunn

One of the most confusing things for the newcomer to Linux is how many distributions, or versions, of the operating system there are. Ubuntu is the one most people have heard of, but there are hundreds of others as well, each offering some variant on the basic Linux theme.Katherine Noyes

There's a huge number of Android phones on the market, but how can you know which one is right for you? Smartphone expert Ginny Mies takes a look at five of the most popular models.



Android - Smartphone - Handhelds - Communications - Palm Pre(author unknown)