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07/10/2013

Review: LulzBot TAZ 3D printer
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Boasting the largest print envelope available for less than US$5,000, the LulzBot TAZ is a RepRap-style 3D printer that presents an open, no-frills design. The TAZ 1.0 is LulzBot’s fourth generation printer, and it uses the company’s sixth generation hot-end (the nozzle and extrusion mechanism for 3D printing). This printer uses an open-source format for both its software and hardware, also known as Libre Hardware.

When the LulzBot TAZ first arrived, the biggest challenge was finding a proper place to set up the system. Having such a big print-envelope (298 mm long x 275 mm wide x 250 mm high) means the machine requires plenty of desk space. After moving a coffee table next to my desk, the LulzBot had a place to start printing. The unboxing was simple, and the machine didn’t require any tools to get printing, though a small kit of tools and utensils was provided for maintenance and cleaning up prints, as 3D prints often require some minor working once off the printer.

After the initial leveling and a couple of software downloads, the first print was underway. The TAZ’s open design doesn’t give any opportunity for noise dampening, so the test print, a small octopus, was a loud venture. Though the humming and zipping of stepper motors was noisy at first, you get used to it, a little like a noisy fan on a computer. Once the first print was completed after about 35 minutes, the fun was to begin with my first download from Thingiverse, the print that is commonly used to test 3D printers, Yoda.

This first real print lead to an email to LulzBot’s support center, as the heated bed ceased to warm up after the initial test print. The failure of the heater to operate properly can’t be pinned entirely on the company, as the printer I received for review was a demo-model that surely had been used and shipped multiple times before. Regardless, the LulzBot support staff was helpful and fast to help me troubleshoot, and eventually exchanged the printer for a different demo. After the new arrival and another test, the first real prints were underway.

24/09/2013

You won’t believe your eyes
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Get ready to be amazed by how powerful simplicity can be. Dell PowerEdge VRTX powered by Intel® Xeon® processors integrates servers, storage, networking and management into a single office-optimized chassis the size of a tower server (or 5U rack). With PowerEdge VRTX, we’ve put the power and function of a complete data center into one small package that can change the face of IT in your remote office, or small to midsized business or branch office.

Put an end to the maintenance headache of your unwieldy patchwork of devices and cables. Take back the time and expense of server integration and management interface retraining. Dell PowerEdge VRTX consolidates all of your disparate management tools into one comprehensive and easy-to-use console.

Get data center power in an office-friendly package
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VRTX improves your office environment, your productivity and your bottom line with features like the following:

* Excellent server density of up to four dual Intel® Xeon® processor server nodes
each with large memory capacity to easily support virtualization projects.
* The latest Intel® Xeon® processor E5 family that dramatically increases performance per server node. In fact, just one of the Dell PowerEdge M620 servers in VRTX, configured with two Intel® Xeon® processor E5-2690, can replace up to 4 PowerEdge M600 blade servers.
* Huge internal shared storage capacity of up to 48TB of data and a choice of either 3.5" or 2.5" drives that support vMotion, clustering and the exponential growth of data.

* An office-optimized form factor with low noise output for unobtrusive operation in small spaces, and support for 100V-240V AC power so you don’t have to rewire your office.
* Simple, intuitive systems management that can be accessed locally or remotely to save time, shorten the downtime window for maintenance and reduce the potential for error. OpenManage Essentials GeoView provides at-a-glance health status in an intuitive, geographic mapping.
* Simplified networking with integrated networking ports.
* High availability that comes from RAID, and redundant power supplies and fans.
* Easy serviceability with an interface simple enough for untrained office staff to service.
* Flexibility and scalability to support your specific workload and budget needs right now, and to scale with you as you grow over time.
* Optional data center capability: VRTX is also rackable in a 5U form factor and supports 100V-240V AC power for easy consolidation — or to gain the continuity of using the same systems in both data center and offices.
* Incredible virtualization capacity: powered by the Intel® Xeon® processor E5 family, VRTX provides up to eight times the processing cores in its 5U-chassis than comparable tower solutions.
* Optional ProSupport Plus: Proactive and preventative support with monthly health checks and performance recommendations with SupportAssist.

24/09/2013

ARM’s architectural stack. The A7 is based on ARM’s AArch64 instruction set
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ARM has done some of that in ARMv8, to be sure, but these advantages are only available in 64-bit mode. 32-bit apps, which will constitute an overwhelming majority for the foreseeable future, can only take advantage of the 32-bit registers and operating modes. That’s a fundamental limitation of compatibility modes — you can’t build a chip that perfectly mirrors 32-bit mode for maximum compatibility but still provides access to new registers and floating point capabilities. The 32-bit version of Angry Birds doesn’t know those options exist, and it can’t use them.

The other disadvantage of going to 64-bit is that your code size and DRAM fetches all inflate somewhat. Good code practices can keep this down, but compare any 32-bit program to a 64-bit version, and you’ll find that the 64-bit flavor is slightly larger. That makes power efficiency more difficult, though Apple can still extract net gains here due to more efficient use of processor characteristics.

24/09/2013

iPhone 5S: The 64-bit A7 chip is marketing fluff and won’t improve performance
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Today, Apple announced the first 64-bit mobile phone, the iPhone 5S. The new A7 SoC is apparently using a custom version of ARM’s ARMv8 architecture, just as the A6 SoC was a custom implementation of ARMv7. There are significant boosts in general purpose and floating point registers that come along with this move. It’s not a bad call, necessarily. But the way it’s being marketed is already deceiving. The benefit of being the first company to launch a 64-bit mobile processor, even with full OS support, is approximately zero.

There are two reasons to adopt a 64-bit architecture. First, there’s RAM addressing. 32-bit systems are limited to 4GB of RAM in theory and typically 2-3GB for any single application depending on OS parameters. 64-bit operating systems allow for up to 16 exabytes of memory. The push to move ARM CPUs to 64-bit architectures has been discussed almost entirely in terms of servers because that’s where the actual benefits to memory addressing are.

The desktop and laptop side of the business offer useful examples here. AMD shipped the first consumer 64-bit chip in 2003. Ten years later, the majority of gamers — 53.96% — have 4GB of RAM or less. This, despite the fact that more than 75% of all users are running 64-bit operating systems. Only 13.22% of gamers according to the Steam Hardware Survey are running Windows 7 32-bit, and that’s the most popular 32-bit OS.

Apple isn’t going to start shipping a phone with more than 4GB of RAM, because RAM takes a significant amount of power to initialize. That’s a non-starter. In mobile, you rearchitect to cut power, not to spend more of it running banks of memory you don’t need. That leaves the second advantage of moving to a 64-bit architecture — companies often use them as an excuse to clean up all the cruft and garbage left in a previous implementation of a 32-bit chip.

24/09/2013

Facebook is working on ‘deep learning’ neural networks to learn even more about your personal life
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Facebook is beginning to take a new approach to the task of digitizing our personalities and spinning them into nicely saleable little packages. After all, posting and updating an exhaustive list of your favorite bands tends to lose its appeal around the end of adolescence; if Facebook wants to truly understand our material wants and needs, it will have to look into our much more personal, much less intelligible communications. This week, Facebook’s chief technology officer said the company’s newly formed AI team has its sights set on building neural networks to learn about your personality in a new and remarkably human way.
Artificial neural networks mirror biological ones, using nodes rather than neurons but building the same sorts of complex interconnections between them. Rather than storing all data in a huge pool to be analyzed as a whole, neural networks remember associations between concepts, streamlining the process of retrieval and analysis. They allow computer scientists to make algorithms for something called “deep learning,” which arranges ideas as layers of definitions. Small concepts collectively define larger ones, which define larger ones, and so on. With enough input information, a sufficiently detailed neural network can learn quite deeply indeed — and, with the possible exception of Google, nobody has access to more raw information than Facebook.

24/09/2013

Intel powers next-generation Chromebooks
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Intel has unveiled a range of Chromebooks using processors based on its Haswell microarchitecture, including HP, Acer, ASUS and Toshiba devices.

The HP device offers a 14-inch diagonal high-definition (HD) display, a 16GB solid-state drive HDMI, USB 2.0 and USB 3.0 ports and a combination headphone and microphone jack.
With sales of Android devices overtaking PCs, Intel appears to be shifting focus away from the traditional WinTel market (Intel-powered PCs running Microsoft Windows) to smart devices.

Intel said it was a major contributor to the Android OS and has enabled 64-bit kernel support for Android. This provides developers with more than 4GB system memory to improve the performance of applications and support applications such as ultra-HD video in mobile devices.

Doug Fisher, vice-president and general manager of software and services at Intel, said: “As mobility becomes more personal and personalised, Intel is innovating to address this shift by creating a set of new services, user experiences and designs for consumers and also IT managers and business users to choose from.”

“Our strategy is to help ensure Intel architecture offers the best experience across all devices, operating environments and price points.”

Intel has introduced its latest Atom processor, the Z3000 Series, which it said was its first mobile quad-core system on a chip design. Intel claimed devices would offer 10-plus hours of active battery life and up to three weeks of standby with an always-connected mobile experience.

Intel’s drive to support non-PC devices reflects a general trend among IT buyers away from desktop and laptop PCs. According to IDC’s Smart Connected Device market share forecast, tablets are set to grow by 79%; and smartphones by 71%, between 2013 to 2017. The analyst reported that desktop PCs only represent 8.6% of the overall smart device market, while tablets represent 14.6%.