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Tapping 'noise canceling' data signals for faster Internet

At the moment, sending data via fiber means blasting a light signal down the line. The farther you want the data to travel, the more power you need to put into the light beam. However, higher-power data signals can actually interact with the material of the fiber line, getting noise degradation into the signal.

The researchers, working out of Bell Laboratories and led by Xiang Liu, tried a technique similar to the way noise-cancelling headphones work to improve the data signal quality across longer distances.

Instead of one light beam, two beams that are mirror images of each other are sent through the fiber. Each beam will gather noise per usual, but that distortion will also be mirrored, so when the two beams are recombined at their destination, the noise is cancelled out. … Read more

Home networking Part 7: Power line connections explained

Editors' note: This post is part of an ongoing series. For the other parts, check out the related stories section below.

Power line networking basically turns a building's existing electrical wiring -- the wires that carry electricity to different outlets in the house -- into network cables, meaning they also carry data signals for a computer network. And this means virtually all households, in the U.S at least, are "wired for" power line networking. It doesn't replace a regular network, so you'll still need a router, but it's a good way to extend … Read more

Exploring expert guidance through Glass

CNET Update hits the bullseye:

In this special edition of CNET Update, I put Google Glass to the test as a coaching tool. Since I need to learn archery to become a proper heroine (e.g. Katniss, Merida, Lara), I wanted to try an archery coaching session through a Google+ Hangout.

I reached out to CoachUp.com to find a coach that was willing to go on this tech adventure with me. CoachUp connected me with M.J. Rogers, an archery coach in South Dakota who has worked with Olympic and Paralympic athletes.

I traveled to Pro Line Archery Lanes … Read more

Flow Line: Branch 1.1.1 Review

If you're looking for a fun, engaging game to while away the hours, look no further than this neat, connect-the-dots app. Flow Line Branch presents a really challenging spin on the Flow format that's gaining steam in mobile gaming. It's not only fun, but your mind will definitely get a workout solving these tough puzzles.

Unlike other flow games, Flow Line Branch requires you to connect multiple lines to the same multicolored circles. Since you don't have nearly as much room as you'll need to do it easily, you'll need plenty or trial and … Read more

How to view and manage script line numbers in OS X

While the need to locate a specific line in a text file may not be a very useful feature in regular prose text, for managing structured code such as scripts and XML files that are common in OS X, being able to identify a specific line or two may be quite useful.

If you have attempted shell scripting in OS X, you may find that when your scripts run into errors you will be given a brief description of the problem that includes the line where the problem occurred. While the use of BBEdit, TextWrangler, and other powerful text editors … Read more

ExifTool is a Perl in Windows at your command

You have plenty of choices when it comes to tools for editing the EXIF metadata contained in your digital images and other files, everything from dead-simple freeware to pro-level applications running into three figures. ExifTool definitely belongs among the freeware, but whether it's a simple tool depends on how you feel about the Windows command line. If you have no idea what that is, ExifTool is not for you; much friendlier metadata tools aren't scarce. But if you can handle Perl or have no problem with the Command Prompt (or typing characters and spaces) then ExifTool offers a … Read more

Grieving for Google Reader's death

CNET Update feeds your need:

Emotions are high over Google Reader shutting down July 1. Thousands have signed online petitions begging Google to reconsider closing the RSS feed reader. Digg announced it is working on a replacement for Google Reader, but if it doesn't come soon enough, here are some replacements you can try now.

Also in Thursday's tech news roundup:

- Facebook redesigns Timeline profile pages

- Twitter adds line breaks, gets hit with ugly stick

- Netflix connects with Facebook to share what you're watching

- Angry Birds cartoon launches onto TV this weekend

Watch … Read more

Fine-tune your Mac and access hidden settings with Cocktail for Mac

Everything on a Mac looks so polished on the outside that it may become unclear how to fine-tune settings under the hood of its graphical interface. Cocktail for Mac allows you to access an impressive number of useful tweaks and enhancements without entering a single line of code.

Cocktail for Mac can manually trigger maintenance scripts, optimize inactive RAM manually or periodically, toggle Spotlight indexing for chosen drives, force special startup modes, and access a lot of the hidden Finder and core app settings, to name just a few options. By "hidden," we mean those settings that are … Read more

FIFA to implement goal line tech in 2014 World Cup

Imagine yourself as England's Frank Lambard playing against Germany in a preliminary match during the 2010 FIFA World Cup. After kicking a solid game-tying shot, you watch the ball oddly bounce downward off the top rail, then in and out of the goal. Even though video footage proves otherwise, the referees disallow the score and Germany eventually goes on to win the game.

Fortunately, such epic miscalls seem less likely to happen during the 2014 World Cup and beyond, as the soccer-regulating organization FIFA plans to utilize a highly accurate sensor system capable of detecting successful shots and ensuring the referees should get the call right every time.… Read more