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More drivers and pedestrians crank their music to high volume to drown out traffic noise. Sadly, this means that police sirens sometimes go unheard.

Enter the Federal Signal Rumbler, a siren that uses two subwoofers and new sonic patterns. These articles from Wired and Gizmodo have more information, and two YouTube videos provide examples of these bone rattling sirens.

I’ve also posted an MP3 file here.

The deep tones in these videos are the Rumbler in action. I hope you don’t hear one this Memorial Day weekend. Stay safe!

Courtesy of BoingBoing, here’s a photo of at least five different electrical outlets that are available at each seat in a European conference room.

It’s not just the power outlets that are different. The outlets provide different voltages and frequencies of alternating current (AC), depending upon the standards. This Wikipedia article has a good discussion that I used to develop a key for the above photo. Going from left to right:

1. Type G or BS 1363: 240v, 50 hZ. Used in the UK, Singapore and South Africa
2. Type E: 220v, 50 hZ. Used in France, Slovakia, the Czech Republic, Denmark, and other European countries.
3. I have no idea what standard the third plug uses.
4. Type J or SEV 1011: 250v, 50 hZ. A Swiss model.
5. Type B, NEMA, PBG: 120v, 60 hZ. The standard 3-pin plug used in the US and Canada. Japanese plugs look similar, but use 100v and 50 hZ.
6. Again, I have no clue which plug this might be.

Every couple of months, someone asks me about a power issue. It might be electric plugs, battery life or power adapters. International travelers sometimes learn a hard lesson about voltage. If an outlet supplies too little voltage, the device will not work well or at all. This is a common issue for European visitors to Hawaii, as our 120v outlets provide only half the power that a European device might need it.

If the outlet provides too much voltage, the device might start smoking or burning. American visitors to Europe sometimes encounter this issue when they force a 12ov Type B plug into a 220v or higher European outlet.

I’ve long thought that the standard USB type A connector might become a standard electrical connector for low-power devices. USB usually provides only 5v of direct current (DC) at 100 or 500 milliamperes. That’s either 1 or 2.5 watts, so USB only useful for charging or running small devices.

DC is the common standard for batteries, and is also used inside almost every electronic device. Batteries have a limited lifespan, even when recharged.

But USB is an international standard, so more and more digital cameras, mobile phones and small devices use this interface for charging. Better yet, perhaps some company will start offering USB power outlets that can be installed directly into a wall.

I’ve found a tool that lets me embed streaming videos in my blog articles.

I used it yesterday to add a 1994 industrial film about the Web to a post I had written earlier in the day.

Here’s a CBC report from the same era. It’s about Videotron, which wasn’t the Web. It was just butt ugly.

This map from StrangeMaps.com and BigPicture.com relabels each of the 50 United States with countries that have similar gross domestic products (GDPs). GDP is the market value of all goods and services produced in a country within a year. Of course, we can find similar figures for each of the 50 states.

Hawaii is world famous, not a world economic power

For example, Nigeria’s GDP of US$82 billion is about the same size as the state of Hawaii, which is also 39th on a ranking of the 50 states and DC.

New Zealand’s GDP of US$99 billion is comparable to the District of Columbia. Yes, the nation’s capital city has a bigger economy than the entire state of Hawaii.

New Jersey is comparable to Russia (US$733 billion), so there’s the number five slot.

Texas is number two: it matches up to Canada, which is the #10 country at US$1.08 trillion.

In the number one slot: California, which matches up to France’s GDP of US$2.15 trillion.

As noted in the article, a map based on per capita GDP would look very different. Most of the US states have smaller populations than their GDP equivalents.

Thanks to Boing Boing for links!

From the SANS Institute, here’s an article by Deborah Hale that discusses how the US and Canadian change to an earlier Daylight Savings Time affects various flavors of Microsoft Windows, Linux, and other systems. I mentioned this change last week.

There are patches for Red Hat Linux, one of the most popular flavors of that operating system.

Five weeks to go, and Windows Vista is ready out of the box.

There is a patch available for Windows XP. Service Pack 2 must already be installed, however. Run Windows Update or Microsoft Update for more details about your machine.

Windows 2000 requires a manual process to update the registry, the massive database that Windows uses to store hardware and software information on a computer. Frankly, anyone who’s running Windows 2000 at this point needs to upgrade.

There is no official patch for earlier versions of Windows (ME, 98, 95, 3.x). It really is “time” to upgrade! (rimshot)

Also, users and administrators should check with software vendors to see if applications, utilities, and other software requires a patch. There’s a deeper discussion in this ComputerWorld article, focusing on Java applications as an example. ComputerWorld also offers this list of vendors and the DST patches or solutions that they’ve announced.

What a mess. At least it’s not as bad as Y2K or the introduction of the Euro (€).

At least WorldTimeServer will get the time right.