Researchers have discovered in two-dimensional conductive systems a new effect that promises improved performance of terahertz detectors.
Optics & Photonics
15 hours ago
0
1735
An intermediate layer consisting of a few atoms is helping to improve the transport of spin currents from one material to another. Until now, this process involves significant losses. A team from Martin Luther University ...
Nanophysics
May 10, 2022
0
179
Can you imagine charging your mobile phone by simply using your body heat? It may still sound rather futuristic, but thermoelectrics can do it. Thermoelectrics is all about transforming heat into useful energy, mostly using ...
Materials Science
Apr 04, 2022
0
48
Educational videos are one of the most widely used resources in the world of education, in both online and on-site environments. A thesis by Victor Jesús García Hernández to obtain his doctorate in the doctoral program ...
Education
Mar 16, 2022
0
8
The Korea Institute of Machinery and Materials (KIMM) has successfully developed the first stretchable meta-display technology that can be stretched up to 25% without image distortion. The results are published in Advanced ...
Optics & Photonics
Mar 14, 2022
0
5
Cyclone Gombe has slammed into northern Mozambique with torrential winds and rain, causing widespread damage to homes and infrastructure and causing at least one death.
Environment
Mar 11, 2022
0
5
A new paper in Oxford Open Economics, published by Oxford University Press, indicates that, while digital financial services are often proposed as a vehicle to lower inequality, the cost and infrastructure barriers to accessing ...
Economics & Business
Mar 01, 2022
0
6
The legal requirement to self-isolate when infected with the coronavirus will end in England on February 24, the UK prime minister has announced. It's been two long years since the start of the pandemic, and during that time, ...
Social Sciences
Feb 22, 2022
0
2
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
0
37
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
