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August 31, 2012

"The Windows Marketplace for Mobile for windows mobile 6.x devices is closing"

"The Windows Marketplace for Mobile for windows mobile 6.x devices is closing" -- that was the title of a March 8, 2012 entry at In it, it said among other things, "Beginning May 9, 2012, the Windows Mobile 6.x Marketplace service will no longer be available. Starting on this date, you will no longer be able to browse, buy or download applications directly on your Windows Mobile 6.x phone using the Windows Mobile 6.x Marketplace application and service." Signed The Windows Phone Team (with "Ready for a new phone? Explore the latest Windows Phones -- now with over 60,000 applications and games available!" in their signature). I mean, the fact that the announcement was made by the Windows Phone team, whose job it is to replace Windows Mobile, and not whoever is responsible within the Windows Embedded contingent tasked with presiding over Windows Embedded Compact speaks volumes.

Good Grief.

What was Microsoft thinking? The one saving grace of what's left of Windows Mobile or Windows Embedded Compact, or whatever it's called these days, was the Windows Marketplace from which you could download apps directly into the device. Whenever I got a new Windows Mobile device for testing, the first thing I always did was download a few essentials, such as Google Maps, Bing, Facebook, Handmark's ExpressNews, a couple of utilities and converters, etc. Now you can't even do that anymore.

It's as if Microsoft (or whatever feuding faction within Microsoft presides over the demise of Windows Mobile these days) had dropped even the last ounce of pretense that they intend to maintain Windows Mobile as a viable contender to iOS and Android. Windows Mobile never was that, of course, but the nicely done Marketplace at least let long-suffering users personalize their devices to some extent. No more.

That is truly regrettable. I don't think anyone ever loved Windows Mobile, but fact is that even today, in 2012, the vast majority of industrial and vertical market mobile hardware still runs one version of Windows Mobile or another. By ditching the Marketplace, Microsoft now has made sure that Windows Mobile devices are truly usable only via 100% custom-designed software that mostly avoids the OS interface altogether.

That is not a happy situation for all the rugged hardware vendors who have faithfully designed, manufactured and marketed innovative, reliable, high quality devices for all those years, and now are saddled with an ancient software platform that is neither supported properly by Microsoft, nor competitive against newer platforms, even those incompatible ones from Microsoft.

Posted by conradb212 at 04:56 PM | Comments (0)

August 11, 2012

Performing under pressure

As I am writing this, the London Olympic games are coming to an end. What two weeks of intense competition proved again is that winning means meticulous preparation, at times a bit of luck, and always the ability to perform under pressure. The latter made me think because rugged computers are all about the ability of a piece of equipment to perform under pressure. Pressure as in heat, cold, dust, rain, sun, and whatever else may keep a system from running at peak efficiency.

Ruggedness testing is designed to determine if systems hold up under pressure, but are the tests really meaningful? Many probably are. If, for example, a system is dropped a number of times from a certain height and still works afterwards, chances are it'll survive similar drops out there in the field. But are all tests as meaningful?

A while ago a manufacturer of rugged computers challenged us to test computing performance not just in an office environment, but also over the entire listed operating temperature range. We did, and not surprisingly, the machinery supplied by that company passed with flying colors, i.e. it ran through the benchmarks as fast at freezing and near boiling temperatures as it did at the 72F we usually have in the test lab.

But, as we subsequently found out, that seems to be the exception. We've been doing benchmark testing on some other rugged devices under thermal stress, and the results are reason for concern. If a rugged handheld, laptop or tablet is supposed to be used out in the field, it's reasonable to assume it'll be asked to perform at peak efficiency at temperatures one might likely encounter outdoors or on the job. Depending on where you are, that might easily include temperatures well over 100 degrees. Such work may well include prolonged exposure to the sun where it may heat up beyond ambient temperature. If it is 105 degrees outdoors, temperatures may easily reach 115 or 120 degrees or even higher if you sit the device down somewhere, or even if it's left in a car. So what happens to performance then? Can the device perform under pressure?

Turns out, not all can.

Running our standard benchmarks after leaving rugged systems out in the California summer sun showed performance drops of 50 to 80%. That's pretty serious. Is it acceptable that a piece of equipment that's supposed to be used outdoors then runs only at a fraction of the speed or even at half speed? I'd say not. Think of the potential consequences. Tasks may take between twice to several times as long, potentially affecting critical decisions.

Is it reasonable to expect full performance under extreme conditions? Not necessarily. Extreme conditions can have an impact on electronics, and there may be justifiable, reasonable precautions to limit performance so as to safeguard the equipment and its life. But is it acceptable to see performance drop to a fraction at the limits of a listed operating temperature range? It's not. Customers should know what level of performance they can expect when the going gets tough.

Like at the Olympics, performance under pressure separates the rugged system winners from the also-rans. This really needs to be addressed.

And it's not a simple issue. Complex electronics such as processors have sophisticated internal power management. Boards have sensors that report temperatures to control mechanisms that then may throttle system performance. Firmware and the OS may also monitor environmental situations and then engage fans or throttle performance. The hardware itself may have inherent design limitations. Variables such as Glass Transition Temperature, or Tg, come into play. Tg is the temperature at which polymer materials go from a glassy state to a rubbery state. The types of capacitors used matters. Conformal coating can protect boards. HALT testing can predict real life reliability better than the simple mean time between component failures. And so on.

All of this is standard practice in embedded systems design. It should be fully and universally adopted in rugged mobile system design as well.

Posted by conradb212 at 04:46 PM | Comments (0)