Researchers from Paragraf and Queen Mary University of London demonstrated the successful fabrication of an Organic Light-Emitting Diode (OLED) with a monolayer graphene anode, replacing ITO in organic light-emitting diodes. ...
Nanomaterials
Jan 07, 2022
0
862
Mobile phones and online technologies are frequently used by perpetrators of domestic and family violence to coerce, control and restrict the freedoms of victims and survivors.
Social Sciences
Nov 11, 2021
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37
Micro-electro-mechanical devices (MEMS) are based on the integration of mechanical and electrical components on a micrometer scale. We all use them continuously in our everyday life: For example, in our mobile phones there ...
Nanomaterials
Nov 09, 2021
0
92
Conflicts and disasters around the world have forced millions of people to move from their homes. By the end of 2020, about 11.1 million people were internally displaced in sub-Saharan Africa.
Social Sciences
Nov 02, 2021
0
27
In a crisis, women make significantly longer phone calls and adhere more closely to governmental measures than men; men are less willing to have their mobility restricted and return to normal more quickly than women. Researchers ...
Social Sciences
Sep 28, 2021
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82
Smartphones can improve academic performance, when used appropriately, according to new research by the School of Business.
Education
Aug 31, 2021
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35
Accelerometers in mobile phones, microprocessors in laptops, and gyroscopes that balance drones each rely on microelectromechanical systems, or MEMS for short. Within these small systems are even smaller devices, called actuators ...
Nanophysics
Jun 25, 2021
0
18
Knowledge systems outside of those sanctioned by Western universities have often been marginalized or simply not engaged with in many science disciplines, but there are multiple examples where Western scientists have claimed ...
Ecology
May 24, 2021
4
247
In nature, scents emitted by plants attract animals such as insects. However, scents are also used in the industry, for example in the production of perfumes and aromas. In order to achieve a reliable, quick, and objective ...
Analytical Chemistry
May 19, 2021
0
18
The effects of mobiles phones and other technology at school is a hotly debated topic in many countries. Some advocate for a complete ban to limit distractions, while others suggest using technology as a teaching tool.
Education
Mar 22, 2021
0
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
