Drones Rearrange This Canopy Prototype So You're Always in the Shade

iStock
iStock

When they're not rebuilding the environment or exploring Mars, the drones of the future may help us avoid some of life's minor inconveniences. A group of masters students at the University of Stuttgart envisioned a fleet of drones that does just that for their thesis project: As New Atlas reports, the drones are part of a roaming canopy, responding to sunlight above and movement below to ensure you're always in the shade.

Without the drones, the prototype, dubbed Cyber Physical Macro Material, resembles a normal stationary structure. Tall black poles support panels that fit together magnetically, protecting whoever's beneath them from the sun's rays. But this design is only effective when the sun is in a certain part of the sky: As the day progresses, the canopy's shadow shifts, and people are forced to move with it if they want to stay out of the light.

But these panels don't stay in the same spot for long. They come equipped with special sensors that keep track of the orientation of the sun and a communications system that corresponds with autonomous drones nearby. If a panel is no longer keeping the ground beneath it shady, a drone will glide over, lift it up, and snap it into a different part of the canopy like a puzzle piece. Drones can also rearrange the panels in response to the size and location of the crowd beneath them, which means the same structure that shades a few pedestrians can also keep a larger party cool.

There are legal and logistical hurdles the project would need to overcome before becoming a system in a real-world, but the researchers behind it say that for now it's meant to get people thinking about the potential applications for drones. A press release from the university reads, "With its ability to continuously reconstruct during use, the system challenges pre-conceived ideas of robotic digital fabrication and sophisticated pre-fabrication for architecture."

You can see how the drone-powered canopy works in the video below.

Cyber Physical Macro Material as a UAV [re]Configurable Architectural System from ICD on Vimeo.

[h/t New Atlas]

What's the Difference Between a Router and a Modem?

iStock.com/Grassetto
iStock.com/Grassetto

Despite using it every day, the internet is still a mystery to many of its users. If asked to explain how your home internet connection works, you may start with your router and modem. Both devices are essential to setting up a wireless network, but they serve distinct functions. Here are the major differences between the two pieces of hardware that make home internet run.

What is a Modem?

Cable modem.
iStock.com/sambrogio

The modem is your home's gateway to the World Wide Web. It's often a skinny box with a row of LED icons on the front that tell you if it's on and connected to the internet. The name is short for modulator-demodulator—a phrase left over from the days of dial-up when modems worked by modulating telephone signals into frequencies that could send digital information.

Today, most modems use broadband connections like cable or satellite to transmit data. There are different types of modems built to fit different connections. If your internet service provider (ISP) uses cable or fiber internet, you'll need to plug a cable into the back of your modem, and if you still use a digital subscriber line (DSL), you'll have to plug in a phone line.

What is a Router?

Internet router.
iStock.com/farakos

You can connect to the internet with just a modem as long as you don't mind plugging your device directly into the Ethernet port. But if you want to provide internet to all the laptops, desktops, and smartphones in your home at the same time, you'll need a router.

Routers usually lie flat and have antennas sticking out of them. The router hooks up to your modem via an Ethernet cable and acts as a conduit between the direct internet and your home network. After connecting your devices, the router "routes" your modem's networking traffic their way, either through Ethernet wires or wirelessly through Wi-Fi (that's what the antennas are for). The router also works in the other direction by routing data sent from your computer back to the web.

Why Knowing the Difference Matters

When they've been sitting in the same spot in your home for years, it's easy to think of your router and modem as basically the same thing. But it's worth knowing the difference—especially if you care about improving your internet connection. Now that you know the router is what directs Wi-Fi signals, you can boost your home network by placing it in a central location away from electronic appliances. And as long as it doesn't interfere with the router, feel free to hide your modem behind a houseplant.

Have you got a Big Question you'd like us to answer? If so, send it to bigquestions@mentalfloss.com.

Hackers Used Facebook Quizzes to Steal Data from 60,000 Users

iStock.com/bombuscreative
iStock.com/bombuscreative

It’s been a tumultuous few months for Facebook. A data breach in fall 2018 exposed information about 30 million of its users to hackers. Only a few months later, the company was also criticized for paying individuals to voluntarily install an app that collected information about their smartphone habits. Now, it’s dealing with concerns that some of the quizzes available on the platform have been used to collect data from unsuspecting users.

According to CNN, the scheme is detailed in a lawsuit Facebook filed in California last week against developers Andrey Gorbachov and Gleb Sluchevsky. The defendants, who are based in Kiev, Ukraine, allegedly created quizzes like, “Do you have royal blood?” or “What does your eye color say about you?” as a way to access private user data. When Facebook users interacted with these tests, they were prompted to install browser extensions that allowed the alleged hackers to pose as those users, collecting information as well as taking control of their browsers. The improperly obtained information consisted of names, ages, and friend lists, which hackers then used for targeted advertising that they injected into users' feeds.

It’s possible the breach also resulted in the publication of 81,000 private messages in 2018, which was initially blamed on unspecified malware browser extensions that have not yet been publicly identified. Facebook has yet to confirm the two incidents are related, however.

Facebook said that the primary targets of the operation were Russian- and Ukrainian-speaking users, with 60,000 browsers compromised.

This isn't the only time Facebook quizzes have been tied to data breaches. Last year’s Cambridge Analytica controversy revealed that the firm used quizzes and questionnaires on Facebook to surreptitiously compile data on millions of users.

So what should you do about it? Online security experts caution against third-party apps that are accessed through Facebook. If you’re concerned about utilities that you installed without much thought, you can see a list by clicking on Settings, then the Apps link on the left menu. If you don’t recognize an app, it’s best to delete it.

[h/t CNN]

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