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There’s an Invisible Tracking Code Embedded in the Documents You Print

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Every job contract, term paper, and yard sale flyer you’ve printed at home may have something in common. According to Quartz, several big-name printer companies have been embedding hidden tracking codes in documents for decades.

The practice is no secret: It was first called to the public’s attention by an article that ran on PCWorld in 2004. That report revealed that Xerox embeds sequences of tiny yellow dots on every sheet of paper that passes through one of their copiers or laser printers. Known as printer steganography, the clusters are staggered about an inch apart across the entire page, but with each circle spanning a millimeter in size they’re impossible to detect without the proper equipment. If they were blown up and made darker you’d be able to see an encoded message containing the serial number and manufacturing code of the source printer.

Unless you use your printer for illicit purposes, this likely isn’t something you need to worry about. The codes are there to make it easier for the Secret Service to track counterfeiters. "It's a trail back to you, like a license plate," Peter Crean, a former senior research fellow at Xerox, told PCWorld.

With the advent of the color printer came a new way for felons to forge money and legal documents. Coded dots were first used to combat this problem in Japan, and they became standard in Xerox color printers sold in America in the mid-1980s.

Printer manufacturers aren’t obligated to implement the technology by law, so there’s a chance it's missing from your computer. There’s also no law forcing companies to be upfront about this hidden feature, so if your printer does have it, it may be difficult to tell. One way to check is with a blue LED light and a magnifying glass: If the yellow dots show up you can be sure that page is traceable back to your printer, whether you mail it across the country or staple it to a telephone pole.

[h/t Quartz]

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People With Limited Mobility Can Now Use Amazon Alexa to Control Exoskeletons
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One of the challenges that comes with engineering exoskeletons that compensate for limited mobility is giving control to the people who wear them. Some systems use hand controls, while others can detect faint signals in the wearer’s muscles and respond accordingly. Now one exoskeleton startup is taking advantage of a technology that’s become mainstream in recent years: voice recognition.

As Engadget reports, Bionik Laboratories has integrated Amazon’s Alexa into its ARKE lower-body exoskeleton. The apparatus is designed for people with spinal chord damage or a history of stroke or traumatic brain injury that has hindered their movement below the waist. After strapping into the suit, wearers will now be able to use it just as they would a television set or stereo enabled with Alexa. Saying “Alexa, I’m ready to stand,” brings the joints to an upright position, and the command “Alexa, I’m ready to walk” prompts the legs to move forward. An Amazon Echo device must be within hearing range for the voice control to work, so in its current state the exoskeleton is only good for making short trips within the home.

Compatibility with Alexa isn’t the only modern feature Bionik worked into the design. The company also claims that ARKE is the first exoskeleton with integrated tablet control. That means if users wish to adjust their suit manually, they can do so by typing commands into a wireless touchpad. The tablet also records information that physical therapists can use to make more informed decisions when treating the patient.

Before the ARKE suit can be made available to consumers, it must first undergo clinical trials and receive approval from the FDA. If the tests go as planned Bionik hopes to have a commercial version of the product ready by 2019.

[h/t Engadget]

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Including Smiley Emojis in Your Work Emails Could Make You Look Incompetent
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If you’re looking to give your dry work emails some personality, sprinkling in emojis may not be the smartest strategy. As Mashable reports, smiley emojis in professional correspondences rarely convey the sentiments of warmth that were intended. But they do make the sender come across as incompetent, according to new research. For their paper titled "The Dark Side of a Smiley," researchers at Ben-Gurion University of the Negev in Israel looked at 549 subjects from 29 countries. After reading emails related to professional matters, participants were asked to judge the "competence and warmth" of the anonymous sender. Emails that featured a smiley face were found to have a "negative effect on the perception of competence." That anti-emoji bias led readers to view the actual content of those emails as less focused and less detailed than the messages that didn’t include emojis. Previous research has shown that sending emojis to people you’re not 100 percent comfortable with is always a gamble. That’s because unlike words or facial expressions, which are usually clear in their meanings, the pictographs we shoot back and forth with our phones tend to be ambiguous. One study published last year shows that the same emoji can be interpreted as either positive or negative, depending on the smartphone platform on which it appears. Fortunately, there are plenty of ways to communicate effectively without leaning on emojis to make you look human. Here are some etiquette tips for making your work emails sound clear and competent. [h/t Mashable]

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