Proof-of-concept nanogenerator turns CO₂ into sustainable power
University of Queensland researchers have built a generator that absorbs carbon dioxide (CO2) to make electricity.
Apr 18, 2024
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University of Queensland researchers have built a generator that absorbs carbon dioxide (CO2) to make electricity.
Apr 18, 2024
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Within the Netherlands, your mobile phone only uses the masts of your own provider. Other providers' masts can only be used to reach emergency services. As soon as you cross the border, you can switch on roaming to use other ...
Apr 17, 2024
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Controlling heat flow is key to enhancing performance in a wide variety of systems. In electronic devices, such as mobile phones or any type of processor, overheating decreases their performance and reduces their lifetime. ...
Apr 11, 2024
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Scientists have discovered a stable and highly conductive lithium-ion conductor for use as solid electrolytes for solid-state lithium-ion batteries.
Apr 2, 2024
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Chinese internet giant Tencent on Wednesday posted its lowest annual profit since 2019, despite slight improvements recently in China's economy and a more lenient attitude taken by regulators towards the tech sector.
Mar 20, 2024
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The recent development of an intelligent sensor that mimics the optic nerve of insects while operating at ultra-high speeds and low power offers extensive expandability into various innovative technologies. This technology ...
Feb 29, 2024
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Your next router will know where you're sitting. A team of researchers from two Madrid universities—Polytechnic (UPM) and Carlos III (UC3M)—has developed a prototype router with high positioning accuracy that allows them ...
Feb 28, 2024
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When her cellphone's service went down this week because of an AT&T network outage, Bernice Hudson didn't panic. She just called the people she wanted to talk to the old-fashioned way—on her landline telephone, the kind ...
Feb 24, 2024
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Civil rights groups on Friday called on an EU watchdog to rule against Facebook owner Meta's scheme to let Europeans pay to opt out of data tracking, which they say violates EU law.
Feb 16, 2024
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If you have grown up with social media, chances are you have taken more photos in the last couple of decades than you will ever remember. When mobile phones suddenly became cameras too, social media turned into a community ...
Feb 2, 2024
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A mobile phone or mobile (also called cellphone and handphone, as well as cell phone, wireless phone, cellular phone, cell, cellular telephone, mobile telephone or cell telephone) is a long-range, electronic device used for mobile voice or data communication over a network of specialized base stations known as cell sites. In addition to the standard voice function of a mobile phone, telephone, current mobile phones may support many additional services, and accessories, such as SMS for text messaging, email, packet switching for access to the Internet, gaming, Bluetooth, infrared, camera with video recorder and MMS for sending and receiving photos and video, MP3 player, radio and GPS. Most current mobile phones connect to a cellular network consisting of switching points and base stations (cell sites) owned by a mobile network operator (the exception is satellite phones, which are mobile but not cellular).
As opposed to a radio telephone, a mobile phone offers full duplex communication, automatised calling to and paging from a public switched telephone network (PSTN), handoff (am. English) or handover (European term) during a phone call when the user moves from one cell (base station coverage area) to another. A mobile phone offers wide area service, and should not be confused with a cordless telephone, which also is a wireless phone, but only offer telephony service within a limited range, e.g. within a home or an office, through a fixed line and a base station owned by the subscriber.
The International Telecommunication Union estimated that mobile cellular subscriptions worldwide would reach approximately 4.1 billion by the end of 2008. Mobile phones have gained increased importance in the sector of Information and communication technologies for development in the 2000s and have effectively started to reach the bottom of the economic pyramid.
This text uses material from Wikipedia, licensed under CC BY-SA