Karman's Law of System Administration

Karman's Law of System Administration:

If a task has three documented steps, at least one step will break.

If a task has four or more documented steps, each step will break.

Karman's Corollary:

If a search yields three or more documents documenting the task, each document will have at least one unique task, and that task will break.

Embedding a Rule Engine in a Semantic Database with a Custom SPARQL Function

Custom SPARQL Predicates with Jena

I-35W Bridge Workshop Exploring CityGML+ARML and the Universal Index of the Physical World

On September 18 2014, Revolutionary Machines held its second CityGML+ARML Workshop, with our partners, Safe Software of Vancouver, DBI Architechts of Reston, and VirtualCitySYSTEMS of Berlin. This time, the Workshop was presented as a live webinar, hosted by Safe Software as part of their acclaimed Webinar Series. The podcast and slides are available here. The table of contents for the Bridge Workshop materials is available here.

Hesitation at the Point of Sale Drives the Internet of Things

I've blogged before about the prospect that the plummeting cost and size of sensors will result in their being embedded into bulk materials during production of those materials. Consumers of items built with the raw materials will have the convenient option of using the sensors or just ignoring them. But manufacturers do not "throw in" extra parts because they are almost zero cost: in competitive mass markets, all costs count. Rather, manufacturers "throw in" optional parts in order to overcome the consumer's hesitation at the point of sale. The point of sale is the sale.


On Drones and Men

On May 8th at the Small Unmanned Systems Business Exposition (sUSB Expo) in San Francisco, Jim Williams of the FAA Flight Technologies & Procedures DivisionAVS Unmanned Aircraft Program Office (UAPO) announced to the public that on March 22, a drone at an altitude of about 2,300 feet located about 5 miles from the airport in Tallahassee, FL (TLH) nearly collided with an American Airlines jetliner.

My Letter to Bill O'Reilly

I am a completely hooked news junkie. I watch every talking head on every channel. But something that has been bothering me for years, is that Bill O'Reilly of Fox News uses the slang "Grand" or "Gs" when he means thousands (as in, "25 Grand" or "25 Gs" meaning 25 thousand dollars). I find this eminently cringeworthy. For at least 20 years, people use "K" for "thousand," partly because of the metric system, and partly because of computers (as in "kilobytes"). He sounds like a 1920s antique talking about "Gs". So, I sent the following letter to Mr.

Citizens in Space: Amateur Satellites as Art

As most of our readers know, I am an avid Ham. One of the most-read newsletters in Amateur Radio is the ARRL Letter. One trend that I have noticed in the Letter, is that the frequency of CubeSat launches has risen so steadily, that nearly every ARRL Letter reports at least one; and some Letters are more than half-filled with space-related articles. The latest Letter was no exception, reporting on the successful launch of the ARTSAT1:INVADER satellite (now officially OSCAR 77).

Insights Into The Architecture of Healthcare.gov

My friend Kash Badami, one of the original techies at MarkLogic who left several years ago to create his own practice, forwarded me this link to an article about the architecture of healthcare.gov . You can decide for yourself how much you believe the explanations for the site's poor performance. But I will bet that this article contains more specific information about the architecture of the site than you have seen anywhere else.

In a nutshell: 48 MarkLogic nodes and an Exadata.


What The Tragedy of MH370 Teaches Us About IoT and Data Lift

As I write this, the investigation continues for the missing Malaysian Airlines Flight 370. I have absolutely no theories on this tragic subject. However, I would like to take a moment to praise one of the unsung heroes in the investigation, Inmarsat, whose engineers were the first to discover, by reviewing the history of satellite pings, that the plane changed course and flew for seven hours after its last ACARS contact.


Subscribe to Revolutionary Machines Blog RSS