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Q&A: Foursquare

2009
Foursquare is a location-based social networking game that lets users “check-in” at venues and meet up with friends nearby (Foursquare for iPhone is shown in Figure 4-1). The app handily combines everything from Core Location to push notifications, and its ambitions run deep.
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Foursquare

2014
Marc Däumler, Marcus M. Hotze
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Foursquare founder: Privacy fears are exaggerated

New Scientist, 2010
Dennis Crowley, head of location-based social networking site Foursquare, says the app is no stalkers ...
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Foursquare

American Scientist, 2013
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Foursquare antenna radiating element

2016
A foursquare dual polarized moderately wide bandwidth antenna radiating element is provided which, due to its small size and low frequency response, is well suited to array applications. The foursquare element comprises a printed metalization on a low-loss substrate suspended over a ground plane reflector.
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Foursquare

2018
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