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The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...
This meant putting the name of a user, a brand, an event or a group in a post in such a way that it linked to the wall of the Facebook page being tagged, and made the post appear in news feeds for that page, as well as those of selected friends. This was first done using the "@" symbol followed by the person's name.
QR decomposition. In linear algebra, a QR decomposition, also known as a QR factorization or QU factorization, is a decomposition of a matrix A into a product A = QR of an orthonormal matrix Q and an upper triangular matrix R. QR decomposition is often used to solve the linear least squares (LLS) problem and is the basis for a particular ...
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Eventbrite is an American event management and ticketing website. The service allows users to browse, create, and promote local events. The service charges a fee to event organizers in exchange for online ticketing services, unless the event is free. [2] In September or October 2023, Eventbrite changed their pricing plans to limit free events ...
A UPC-A barcode. A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called barcode ...
BibSonomy. A system for sharing bookmarks and lists of literature. Digg. A news aggregator with an editorially driven front page. Diigo. Designed to bookmark web pages and highlight key points for reference. Has both a free version and a premium version. Hatena. Hatena Bookmark is a social bookmarking service by a Japanese company.
A QR code payment is a mobile payment method where payment is performed by scanning a QR code from a mobile app. [1] This is an alternative to doing electronic funds transfer at point of sale using a payment terminal. [2] This avoids a lot of the infrastructure traditionally associated with electronic payments such as payment cards, payment ...
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