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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19
Engineering
Two-dimensional semiconductors have a chance to galvanize significant advances in electronic device capabilities, replacing silicon-based chips. However, many problems continue to hold back these devices.
Mar 8, 2023
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70
Business
TikTok has found a partner in Europe to guarantee that users' data is not transferred to China, a company executive said on Friday, after the European Union banned the app on work devices.
Mar 3, 2023
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4
Internet
Modern communication systems need two main things: power, and what engineers call "backhaul", the connections that link cell towers and exchanges to the national network. When Cyclone Gabrielle struck, both were badly compromised.
Mar 3, 2023
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9
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
Electronics & Semiconductors
It's been a wild few years for the microchip industry, recovering from a long-term supply squeeze only to be thrust into the centre of a US-China battle to control supply lines of the valuable technology.
Mar 2, 2023
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3
Business
The father of the cellphone was there. So was Huawei and a host of other Chinese tech companies. Tens of thousands of visitors also flocked to the MWC tech fair to be dazzled by the latest advances in AI, smartphones, robotics ...
Mar 2, 2023
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6
Business
The Mobile World Congress (MWC) is primarily a pow-wow for the big-wigs of the telecom industry, but far from the main thoroughfares of the vast conference there are always hidden tech gems.
Mar 2, 2023
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7
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
Western governments are falling over each other to restrict social media platform TikTok, but Chinese firms are still huge in sectors from smartphones to network equipment and are only looking to grow.
Mar 1, 2023
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4
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
