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Submission + - Remember Second Life? Its Fans Say Education Could be Killer App (

jyosim writes: Ten years ago Second Life was HUGE, and many colleges erected virtual campuses. Now some of those sit empty, but a group of die-hard fans continue to use it for teaching. Some are already saying that new VR headsets like Oculus will usher in the next generation of online education — that students and profs will soon be entering virtual worlds for new a new kind of classroom experience. But how can this new attempt at VR education succeed where previously efforts failed?

Submission + - World's Longest and Deepest Rail Tunnel Opens Under Swiss Alps writes: Sewell Chan writes at the NYT that the world’s longest and deepest rail tunnel has opened in Switzerland, nearly seven decades after it was first proposed. The 35-mile twin-bore Gotthard Base Tunnel is the first flat route through the Alps or any other major mountain range, with a maximum height of 1,801 ft above sea level. It is therefore the deepest railway tunnel in the world, with a maximum depth of approximately 7,500 ft), comparable to that of the deepest mines on earth. Engineers had to dig and blast through 73 different kinds of rock, some as hard as granite and others as soft as sugar. More than 28 million tonnes of rock was excavated, which was then broken down to help make the concrete used to build the tunnel. Because the tunnel fully crosses the Alps, the latter range strongly influencing the European climate and that of Switzerland in particular, it can see drastically different weather conditions at the two ends, with, some days, differences of well over 10 C. The new tunnel clears the way for a high-speed rail link under the Swiss Alps that will revolutionize freight and passenger transportation cutting the current four-hour trip between the economic hubs of Zurich and Milan by about an hour. After testing ends this year, around 260 freight trains and 65 passenger trains are expected to travel through the two-tube tunnel each day, reaching speeds approaching 100 miles an hour for freight and 125 miles an hour with passengers. Passenger trains are expected to eventually reach 155 miles an hour. Goods currently carried by a million trucks a year will eventually be moved by trains instead. But the new world record might not last long: China has announced plans for a 76-mile tunnel between the northern port cities of Dalian and Yantai, under the Bohai Strait.

Submission + - Digital Cable Q2Q Enterprise Decoding?

racerx509 writes: I work for a school district in Georgia and we are trying to improve our IPTV distribution system. Currently, we house 30 RG6 cable taps, going to 30 cable boxes on a server rack in our data center, feeding 30 encoders via component cable cables as well as a few IR blasters to change channels. Each encoder has a multicast stream address, which runs through a big switch, that sends the encoded video data across our network. Clients pick up the stream through an internal AD managed web interface.

The whole setup is slated to move later on this year, so I was hoping to improve things by simplifying the cable boxes, taps and encoders. We convinced the cable company to rent us a hospitality style Q2Q installation at our data center, which outputs Pro Idiom DRM encrypted QAM signals, which will need to be decrypted and re-encoded as MPEG4 before I can stream....

I'd like to leave the consumer cable boxes behind, as they require constant babysitting, a hard power reset after inclement weather, and no way to monitor any of it in our NOC. Also, the IR blasters lack security, which has led to random sporting events showing up on all channels during *insert sport season*.

The cable company isn't being overly helpful, as they do not have a way of monetizing a Q2Q system, the way we are using it, so I'm turning to slashdot.

I've found a few solutions that may work, but all are rather expensive. Price isn't the issue, but I want to know if they actually *work* as advertised. I have some experience, but any help or suggestions would be greatly appreciated. Has anyone here had experience in the hospitality or enterprise IPTV sector?

Comment Re:YAM2C (Yet Another My Two Cents) (Score 1) 341

Good point. The reason I like to use JS everywhere is that I only need to learn one language. And it means I can learn it really well. Until I did full-stack JavaScript I had only done front-end JS and it was pretty wonky. Using Node.js means that you need to learn some of the great parts of JS well (closures, async, etc). This drastically improved my front-end JS. If you used the LAMP method for full stack development, you would need to learn Apache config (although once it's running it's okay), PHP, JavaScript and SQL, and I would not have the time to learn the subtleties of each language.

I agree that the object model and patterns for MongoDB are different, the object mode and patterns for front-end and back-end are very similar in many cases, there is a big overlap. Things you use on all three are:
  - Callbacks
  - Closures
  - Prototypical inheritance (front-end and back-end)
  - Event emitters (front-end and back-end)
  - And many more like described here: https://www.smashingmagazine.c...

Code re-usability is useful at times, I was able to write a library ( that was used on the server, on the front-end and on an embedded device and I guess around 80% of the code is shared across all three. Imagine writing and debugging that code in three different languages.

Comment YAM2C (Yet Another My Two Cents) (Score 1) 341

I dove straight into Node.js to develop a platform around 3 years, I don't regret using Node.js, in fact I am glad that I used it. I essentially used the MEAN stack (MongoDB, Express, Angular and Node.js). It was great to:
1) use JS everywhere: back-end (including the DB) and front-end.
2) use JS: it's fun (for me) - if you use the right parts. And it performs fast enough, on par with PHP, if not faster.
3) have an experienced community - JS and Node.js has gone through it's teething issues already.
4) do async programming - if you do it right, you tend to keep your code more modular.

What was painful:
1) Learning to write JS the "right way" and how to avoid the bad and ugly parts.
2) At the time there was no great CMS, I believe Keystone is the best at the moment, but it looks very light when compared to Wordpress.

What you need to do if you go with Node.js:
1) Learn JS well, learn "The Good, The Bad and The Ugly", such that you can avoid the Bad and Ugly. The good is actually awesome.
2) Understand prototypical inheritance, it's not your classical classes, but it a powerful and memory efficient way create objects.
3) Use a linter to write your code, like eslint, it will help you avoid the bad and ugly parts.

I still use Node.js today, but now for the Internet of Things and my embedded device runs Node.js. JS is everywhere and it's going to remain everywhere.

Comment FUD!! (Score 1) 555

Electric and hybrid cars use regenerative breaking, such that when the driver brakes lightly the car will use the electric motor as a generator and recharge the battery, hence the braking emissions would be largely reduced. Heavy breaking will use the disc brakes as well as regenerative braking at the same time, so there will be some emissions then, but still less than classical vehicles.

Comment What support channels are recommended for noobs? (Score 3, Interesting) 59

I have been using Linux since the good old days of the late 90's. I was using Debian until Ubuntu came around in 2004 and switched. Ubuntu was amazing in terms of how it made Linux more usable. However, as time went along Ubuntu was no longer so cutting edge and no longer resonated with me, so I have switched back to Debian. Anyway, all this time as a Linux user it's been a rough ride, every laptop I have purchased (I haven't had a desktop for 15 years) has had issues with Linux. Most common issues for me are that wi-fi drivers don't work and graphics card drivers are unstable. I choose Laptops that are going to give me the least problems by researching them thoroughly beforehand. The most recent laptop (HP ProBook) came with the option of having SUSE Linux installed by default, I thought this would be perfect, but the wi-fi did not work unless you had the correct version of SUSE installed. I am experienced at debugging and resolving issues, a new user would require a lot of patience, technical no-how just to get Linux functioning before they can use their PC. Although you can use Linux without the console, it is difficult to never have to go to the console. The console requires a paradigm shift for many users. In a nutshell the first hurdle for Linux is a massive jump, and only few are brave/curious enough to take it.

So my question is: What support channels would you recommend for new Linux users?

Comment Weka Mooc (Score 1) 123

About a year ago I completed the Weka Mooc ( Weka is an opensource machine learning / data mining tool that has many different machine learning tools and algorithms.

The mooc part is the course. It was free at the time I did it, but I don't know if it still is. The mooc is run by an experienced machine learning professor. Weka is also maintained and developed in the same department as his.

I highly recommend this course, it was informative, gave me a grasp of machine learning, as well as experience of a popular tool (weka). I was also able to complete it in my own time while working full time and having a family.

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