Category Archives: Development

DJI Phantom Quadcopter with GoPro Mount

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The DJI Phantom Quadcopter with GoPro Mount is a remote controlled, four-propeller quadcopter with a removable GoPro camera mount for capturing POV footage of flight. The compact and lightweight Phantom is ready-to-fly right out of the box and it includes the remote control unit and receiver, which gives the device a transmission range of up to 984.25′ (300m). The Phantom also features an intelligent Naza-M + GPS multi-rotor autopilot system, which supports two flight modes and a failsafe function that will automatically trigger the device to land safely when control is lost.

via DJI Phantom Quadcopter with GoPro Mount CP.PT.000001 B&H Photo.

Solr: The Most Important Open Source Project You’ve Never Heard Of

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Lucene is used by many companies and groups as the foundation for their search engines. These organizations include AOL, Disney, and Eclipse. Lucene’s chief selling point is that the indexing engine, with a footprint of a mere megabyte of RAM, can index up to 150GBs per hour of text on commercial off-the-shelf hardware. That’s darn good!

Solr comes into the picture as the search platform front-end for Lucene. It provides full-text search, including the ability to handle such formats as Microsoft Word and PDF with Apache Tika; hit test highlighting; and faceted search, which incorporates free text searching with topic taxonomy indexing.

via Solr: The Most Important Open Source Project You’ve Never Heard Of.

Under the hood, Solr is written in Java and it relies on Lucene for its core functionality.  It usually runs within a servlet container such as the Jetty HTTP server and Javax.servlet.

$199, 4.2” computer is Intel’s first Raspberry Pi competitor

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One thing these platforms have in common is an ARM processor. Now they have some competition from Intel with its “MinnowBoard,” a $199 computer in the form of a 4.2″ x 4.2″ board with an Intel Atom processor.

via $199, 4.2” computer is Intel’s first Raspberry Pi competitor | Ars Technica.

MinnowBoard uses a 5V/2.5A power supply. Other specs are as follows:

  • Intel Atom E640 CPU (1.0GHz, 32-bit with Hyper-threading and Virtualization Technology)
  • Integrated Intel Graphics Media Accelerator (GMA) 600
  • PCI Express
  • SATA2 3Gbps
  • Gigabit Ethernet
  • >MicroSD
  • USB
  • UEFI Firmware
  • 1GB DDR2 RAM<
  • 8 GPIO pins
  • 2 GPIO-controlled LEDs
  • 4 GPIO switches

The Best of Open Source Software Awards

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via Bossies 2013: The Best of Open Source Software Awards | Open Source Software – InfoWorld.

I Flirt and Tweet. Follow Me at #Socialbot.

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For some, the goal is increasing popularity. Last month, computer scientists from the Federal University of Ouro Preto in Brazil revealed that Carina Santos, a much-followed journalist on Twitter, was actually not a real person but a bot that they had created. Based on the circulation of her tweets, a commonly used ranking site, Twitalyzer, ranked Ms. Santos as having more online “influence” than Oprah Winfrey.

via I Flirt and Tweet. Follow Me at #Socialbot. – NYTimes.com.

Socialbots are tapping into an ever-expanding universe of social media. Last year, the number of Twitter accounts topped 500 million. Some researchers estimate that only 35 percent of the average Twitter user’s followers are real people. In fact, more than half of Internet traffic already comes from nonhuman sources like bots or other types of algorithms. Within two years, about 10 percent of the activity occurring on social online networks will be masquerading bots, according to technology researchers.

Hibernate (Java)

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Hibernate is an object-relational mapping (ORM) library for the Java language, providing a framework for mapping an object-oriented domain model to a traditional relational database. Hibernate solves object-relational impedance mismatch problems by replacing direct persistence-related database accesses with high-level object handling functions.

Hibernate is free software that is distributed under the GNU Lesser General Public License.

Hibernate’s primary feature is mapping from Java classes to database tables (and from Java data types to SQL data types). Hibernate also provides data query and retrieval facilities. It also generates the SQL calls and attempts to relieve the developer from manual result set handling and object conversion and keep the application portable to all supported SQL databases with little performance overhead

via Hibernate (Java) – Wikipedia, the free encyclopedia.

The site to download it is here.

Why mobile web apps are slow

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At some point it will occur to you that keeping 30MB buffers open to display a photo thumbnail is a really bad idea, so you will introduce 6) the buffer that is going to hold a smaller photo suitable for display in the next screen, 7) the buffer that resizes the photo in the background because it is too slow to do it in the foreground. And then you will discover that you really need five different sizes, and thus begins the slow descent into madness. It’s not uncommon to hit memory limits dealing just with a single photograph in a real-world application.

via Why mobile web apps are slow | Sealed Abstract.