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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 ...
Paste the URL into the box. (The code will automatically generate.) Edit. Click on the QR code image and save it. Import the QR code image into a word processor programme or graphics package. (Optionally) Add text labels. Print. Print the code a minimum of 1 inch (2.5 cm) across, where possible 2 inches (5 cm).
The code was introduced in 1994. [12] In 2021, QR codes were being used to book and track COVID-19 tests and contact tracing. [6] Hara has stated that he would like to develop QR codes for additional medical purposes, including imaging such as x-rays or electrocardiogram data. [2] Hara still works for Denso as of 2022. [1]
Barcode. 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 ...
Q code. This is one of a set of articles on telegraphy. The Q-code is a standardised collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio.
Peer instruction. Peer instruction is an evidence-based, interactive teaching method popularized by Harvard Professor Eric Mazur in the early 1990s. [1] [2] Originally used in many schools, including introductory undergraduate physics classes at Harvard University, peer instruction is used in various disciplines and institutions around the globe.
Signal operating instructions (SOI) or Communications-Electronics Operation Instructions (CEOI) are U.S. military terms for a type of combat order issued for the technical control and coordination of communications within a command. [ 1] They include current and up-to-date information covering radio call signs and frequencies, a telephone ...
[citation needed] The types of operations include arithmetic, data copying, logical operations, and program control, as well as special instructions (such as CPUID and others). [10] Assembly language, or just assembly, is a low-level programming language, which uses mnemonic instructions and operands to represent machine code. [10]
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