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Harnessing smartphones to track how people use green spaces

A new study demonstrates how anonymized GPS data from people's smartphones can be used to monitor the public's use of parks and other green spaces in urban areas, which could help inform their management. Alessandro Filazzola ...

Examining the limits of nonlocal wide-field-of-view metalenses

Metalenses, compact lenses made with metasurfaces, have the potential to enable thinner, lighter, cheaper, and better imaging systems for a wide range of applications where miniaturization is critical (e.g., for mobile devices, ...

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Mobile device

A mobile device (also known as cellphone device, handheld device, handheld computer, "Palmtop" or simply handheld) is a pocket-sized computing device, typically having a display screen with touch input or a miniature keyboard. In the case of the personal digital assistant (PDA) the input and output are combined into a touch-screen interface. Smartphones and PDAs are popular amongst those who require the assistance and convenience of a conventional computer, in environments where carrying one would not be practical. Enterprise digital assistants can further extend the available functionality for the business user by offering integrated data capture devices like Bar Code, RFID and Smart Card readers.

==Types of mobile devices== ==== Mobile computers==== *Netbook *Smartbook *Notebook PC *Ultra-Mobile PC *Handheld PC *Personal digital assistant/Enterprise digital assistant *Graphing calculator *Pocket computer (largely obsolete) ====Handheld game consoles==== * Nintendo DS (NDS) * Game Boy, Game Boy Color * Game Boy Advance * Sega Game Gear * PC Engine GT * Pokémon Mini * NeoGeo Pocket, NeoGeo Color * Atari Lynx * Pandora * GP2X/GP32 * Gizmondo * PlayStation Portable (PSP) * N-Gage * WonderSwan ====Media recorders==== *Digital still camera (DSC) *Digital video camera (DVC or digital Camcorder) *Digital audio recorders ====Media players/displayers==== * Portable media player * e-book reader ====Communication devices==== * Mobile phone * Cordless telephone * Pager ====[[Personal nav

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