Japan's 'flying car' gets off ground, with a person aboard (Video)
The decades-old dream of zipping around in the sky as simply as driving on highways may be becoming less illusory.
Aug 28, 2020
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The decades-old dream of zipping around in the sky as simply as driving on highways may be becoming less illusory.
Aug 28, 2020
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78013
Looking at your cell phone, you realize the battery is low, which means you have to make another long walk into town to pay money to charge the device. By the time you get home, it's getting dark. You light the kerosene lamp ...
Mar 6, 2019
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Signals sent and received from cell phone microphones and speakers could help warn people when they have been near someone who has contracted COVID-19, researchers say.
Jul 1, 2020
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The problem with mobile phones is that people look at them too much. At least, that's according to the man who invented them 50 years ago.
Mar 30, 2023
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Clothing embedded with tiny solar cells the size of a flea can allow wearers to generate electricity on the move and charge items like mobile phones and smartwatches.
Dec 13, 2018
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Signs on gas pumps across the nation caution "Do not use cell phone while pumping gas" or "Turn off cellular phone," but is there a real danger to talking or texting on your phone while pumping gas? Could it cause an explosion?
Jun 16, 2022
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Lithium-ion batteries are the most widespread portable energy storage solution—but there are growing concerns regarding their safety.
Mar 20, 2023
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Right now, there is a good chance your phone is tracking your location—even with GPS services turned off. That's because, to receive service, our phones reveal personal identifiers to cell towers owned by major network ...
Aug 12, 2021
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Sunshine streaming through a window could be directly harnessed for wireless data transmission to electronic devices. KAUST researchers have designed a smart glass system that can modulate the sunlight passing through it, ...
Nov 1, 2022
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Ultrasonic waves don't make a sound, but they can still activate Siri on your cellphone and have it make calls, take images or read the contents of a text to a stranger. All without the phone owner's knowledge.
Feb 27, 2020
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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