Energy & Green Tech
Costa Rica, a country where open pit mining is banned, has become a leader in the extraction of heavy metals such as lithium—not from the Earth, but old batteries.
Mar 13, 2023
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17
Internet
It's happened to anyone with a cell phone—dropped calls or dead air because suddenly there is no service available. Or worse, the location pin drops on the navigation app.
Mar 3, 2023
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67
Robotics
Researchers from Bochum and Saarbrücken have detected security vulnerabilities, some of them serious, in several drones made by the manufacturer DJI. These enable users, for example, to change a drone's serial number or ...
Mar 2, 2023
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172
Internet
There are certain rites of passage in life. Milestone birthdays, graduations, marriages or births. And of course, that first email from a Nigerian prince who wants your bank account number to safeguard money with the promise ...
Mar 2, 2023
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3
Internet
The U.S. and Canada issued orders this week banning the use of TikTok on government-issued mobile devices as privacy and cybersecurity concerns about the video-sharing app grow.
Mar 1, 2023
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0
Business
The United States is ratcheting up national security concerns about TikTok, mandating that all federal employees delete the Chinese-owned social media app from government-issued mobile phones. Other Western governments are ...
Mar 1, 2023
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4
Business
A contingent of Chinese companies led by technology giant Huawei is turning the world's biggest wireless trade fair into an opportunity to show their muscle in the face of Huawei's blacklisting by Western nations concerned ...
Feb 27, 2023
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5
Engineering
Micro-light-emitting diodes (μLEDs) could have many valuable technological applications. For instance, they can be used to create highly efficient displays for smart phones, tablets and virtual reality displays, enhancing ...
Feb 22, 2023 feature
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80
Telecom
When you think about location data on your mobile phone, tablet or laptop, what comes to mind? Mailing addresses? Postal codes? These data indicate where you live, where you work, and the places you visit.
Feb 21, 2023
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6
Hardware
In modern electronics, a large amount of heat is produced as waste during usage—this is why devices such as laptops and mobile phones become warm during use, and require cooling solutions. In the last decade, the concept ...
Feb 21, 2023
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1428
The telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice") is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government. The word "telephone" has been adapted to many languages and is widely recognized around the world.
The device operates principally by converting sound waves into electrical signals, and electrical signals into sound waves. Such signals when conveyed through telephone networks — and often converted to electronic and/or optical signals — enable nearly every telephone user to communicate with nearly every other worldwide. Graphic symbols used to designate telephone service or phone-related information in print, signage, and other media include ℡, ☎, ☏, and ✆.
This text uses material from Wikipedia, licensed under CC BY-SA
