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51-704: DMC may refer to: [REDACTED] Look up dmc in Wiktionary, the free dictionary. Computer Science [ edit ] Data Matrix Code , laser etched square code, often used for marking products in the production area Diffusion Monte Carlo method Digital Media Controller , a category within the DLNA standard (for sharing digital media among multimedia devices) tasked with finding content on digital media servers Discrete memoryless channel Dynamic Markov Compression algorithm Dynamic Mesh Communication ,

102-983: A Half-Life mod Drummond Money-Coutts , an English magician Vehicles [ edit ] DeLorean Motor Company , former American automobile manufacturer (1975-1982) DeLorean Motor Company (Texas) , company founded in 1995 supplying parts and services to owners of DeLoreans Daelim Motor Company , a South Korean motorcycle, motorscooter and ATV manufacturer Organizations [ edit ] Damak Multiple Campus , Jhapa, Nepal Dhaka Medical College , Bangladesh Diablos Motorcycle Club , an American outlaw motorcycle club Divisional Model College in Pakistan Deseret Management Corporation , LDS Church company Destination management company , organizing events Detroit Medical Center , Michigan, US Dipolog Medical Centre Foundation College, Inc , Dipolog City, Philippines DMC (company) ( Dollfus-Mieg et Compagnie )

153-602: A 0 (zero) for not done or not applicable. The system is informal, and has variations – the work may not count for the final grade or may count for a small amount. If so, the plus/check/minus may or may not be different in value, with any form of check simply counting as participation. Due to their status as significant documents in many formal education systems, many early grade reports were printed on cardboard, card-stock paper, or other heavy paper-based materials that were heavier, more durable, and less bendable than standard-weight paper. Many formal education systems also standardize

204-577: A common template. The first quarter of page 1 shows the student's information. The bottom 3/4 of the first page includes the Learning Skills descriptors regarding the student's behaviour, teacher comments on the learning skills and overall level for each skill (marked on a scale of E (Excellent), G (Good), S (Satisfactory), or N (Needs Improvement)). The learning skill categories are Organization, Collaboration, Initiative, Independent Work, Self-Regulation, and Responsibility. Pages 2 and 3 contain all of

255-609: A different set for the next character. The only difference is that they reverse upper-and lower-case letters. C40 is primarily upper-case, with lower-case letters in set 3; Text is the other way around. Set 1, containing ASCII control codes, and set 2, containing punctuation symbols are identical in C40 and Text mode. EDIFACT mode uses six bits per character, with four characters packed into three bytes. It can store digits, upper-case letters, and many punctuation marks, but has no support for lower-case letters. Base 256 mode data starts with

306-596: A grade report. Pupils at key stage 3 are typically awarded a national curriculum level (up to 8th grade), while GCSE students will be awarded a grade (from A* to G, or U- from 9 to 1 with the new grading system ). In 2010 the Government agency for ICT in education, BECTA , put in place a requirement for school report cards for all pupils in the comprehensive school system to have their reports made available to parents online (see also electronic grade book ). In Ontario, provincially standardized report cards are issued at

357-495: A length indicator, followed by a number of data bytes. A length of 1 to 249 is encoded as a single byte, and longer lengths are stored as two bytes. It is desirable to avoid long strings of zeros in the coded message, because they become large blank areas in the Data Matrix symbol, which may cause a scanner to lose synchronization. (The default ASCII encoding does not use zero for this reason.) In order to make that less likely,

408-402: A member of hip hop group Run–DMC DMC World DJ Championships , an international turntablism competition Devil May Cry , a Japanese video game series Devil May Cry (video game) , the first game in the series DmC: Devil May Cry , a reboot of the series Detroit Metal City , a manga franchise Dhammakaya Media Channel , a Thai television channel Deathmatch Classic ,

459-469: A mesh-based intercom system developed for motorcycle communication Science and Technology [ edit ] Data monitoring committee for clinical trials Dimethyl carbonate , a chemical compound Dissimilar metal corrosion , an electrochemical process Double monocable , a type of ropeway technology Media and Entertainment [ edit ] Digital mixing console , used in audio mixing DMC (rapper) (Darryl McDaniels, born 1964),

510-467: A nine-week grading period, or three weeks into a six-week grading period) and contain virtually the same information as the report card. These reports allow students and their parents to see if school performance is slipping and if intervention is required to bring up the grade. English secondary schools would traditionally issue a written report, no more regularly than once a year. This is changing, however, with many schools now publishing reports similar to

561-559: A number of purposes, such as movement tracking or inventory stock checks. Data Matrix codes, along with other open-source codes such as 1D barcodes can also be read with mobile phones by downloading code specific mobile applications. Although many mobile devices are able to read 2D codes including Data Matrix Code, few extend the decoding to enable mobile access and interaction, whereupon the codes can be used securely and across media; for example, in track and trace, anti-counterfeit, e.govt, and banking solutions. Data Matrix codes are used in

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612-462: A parcel has been dispatched to the recipient. For industrial engineering purposes, Data Matrix codes can be marked directly onto components, ensuring that only the intended component is identified with the data-matrix-encoded data. The codes can be marked onto components with various methods, but within the aerospace industry these are commonly industrial ink-jet, dot-peen marking, laser marking, and electrolytic chemical etching (ECE). These methods give

663-441: A permanent mark which can last up to the lifetime of the component. Data Matrix codes are usually verified using specialist camera equipment and software. This verification ensures the code conforms to the relevant standards, and ensures readability for the lifetime of the component. After component enters service, the Data Matrix code can then be read by a reader camera, which decodes the Data Matrix data which can then be used for

714-480: A textile company in Mulhouse, France Other uses [ edit ] Detailed marks certificate , a detailed report of academic performance Digital Media City , Seoul, South Korea Disaster Monitoring Constellation of imaging satellites DMC International Imaging , operator of satellites Domestic material consumption , measurement of material used Dubai Maritime City Topics referred to by

765-459: Is x 8 + x 5 + x 3 + x 2 + 1 {\displaystyle x^{8}+x^{5}+x^{3}+x^{2}+1} , corresponding to the polynomial number 301, with initial root = 1. The Reed–Solomon code uses one of 37 different polynomials over F 256 {\displaystyle \mathbb {F} _{256}} , with degrees ranging from 7 to 68, depending on how many error correction bytes

816-464: Is an issue, but all color variations need to be tested before production to ensure they are readable. In May 2006 a German computer programmer, Bernd Hopfengärtner, created a large Data Matrix in a wheat field (in a fashion similar to crop circles ). The message read " Hello, World! ". In June 2011 the Parisian tattoo artist K.A.R.L., as part of a promotion for Ballantine's scotch whisky, created

867-499: Is both invalid and unenforceable due to inequitable conduct by the defendants during the procurement of the patent. While the ruling was delivered after the patent expired, it precluded claims for infringement based on use of Data Matrix prior to November 2007. A German patent application DE 4107020 was filed in 1991, and published in 1992. This patent is not cited in the above US patent applications and might invalidate them. Detailed marks certificate The term "report card"

918-432: Is delimited by a finder pattern, and this is surrounded on all four sides by a quiet zone border (margin). (Note: The modules may be round or square- no specific shape is defined in the standard. For example, dot-peened cells are generally round.) ECC 200, the newer version of Data Matrix, uses Reed–Solomon codes for error and erasure recovery. ECC 200 allows the routine reconstruction of the entire encoded data string when

969-428: Is different from Wikidata All article disambiguation pages All disambiguation pages Data Matrix Code A Data Matrix is a two-dimensional code consisting of black and white "cells" or dots arranged in either a square or rectangular pattern, also known as a matrix . The information to be encoded can be text or numeric data. Usual data size is from a few bytes up to 1556 bytes . The length of

1020-405: Is often followed by a break of some sort. For example; First term Christmas Holidays, second term March break and third term Summer Holidays. Some school districts may administer report cards on a quarterly basis, usually after each nine week term. In some secondary schools , students receive two report cards, one at the end of each grading period. They also get mid-term report cards midway through

1071-536: Is used to describe any systematic listing and evaluation of something for information. For example, many states in the United States have their education departments issue report cards on schools' performance. Political advocacy groups will often issue "report cards" on legislators, "grading" them based on their stances on issues. In Serbia the role of report cards is widely fulfilled by svedočanstva ("testimonies"), in which all final (annual) grades throughout

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1122-467: The food industry in autocoding systems to prevent food products being packaged and dated incorrectly. Codes are maintained internally on a food manufacturers database and associated with each unique product, e.g. ingredient variations. For each product run the unique code is supplied to the printer. Label artwork is required to allow the 2D Data Matrix to be positioned for optimal scanning. For black on white codes testing isn't required unless print quality

1173-490: The 2016–2017 school year. These are strictly comment-based report cards and are issued on the same schedule that the grade 1–8 report cards are issued. As of 2018, only the public and Catholic school boards in Ontario are required to use the provincial report cards. Many private schools choose to use the provincial report card to maintain the standards set by Ontario's Ministry of Education. The report cards for grades 1–6 use

1224-492: The ECC 000 through 140 error correction can be recognized by the upper-right corner module being the inverse of the background color. (binary 1). According to ISO/IEC 16022, "ECC 000–140 should only be used in closed applications where a single party controls both the production and reading of the symbols and is responsible for overall system performance." Data Matrix was invented by International Data Matrix, Inc. (ID Matrix) which

1275-439: The ECC 200 error correction can be recognized by the upper-right corner module being the same as the background color. (binary 0). Additional capabilities that differentiate ECC 200 symbols from the earlier standards include: Older versions of Data Matrix include ECC 000, ECC 050, ECC 080, ECC 100, ECC 140. Instead of using Reed–Solomon codes like ECC 200, ECC 000–140 use a convolution-based error correction. Each varies in

1326-521: The above grade 1–6 information. In many elementary schools in North America, a "Check System" is used in the primary grades ( kindergarten to third grade ) in place of letter grades. Teachers give a Check for at the given grade's level, Check Plus for advanced, and Check Minus for below the given grade's level. A similar system is used for informal, low-stakes grading in US colleges, particularly in

1377-525: The amount of error correction it offers, with ECC 000 offering none, and ECC 140 offering the greatest. For error detection at decode time, even in the case of ECC 000, each of these versions also encode a cyclic redundancy check (CRC) on the bit pattern. As an added measure, the placement of each bit in the code is determined by bit-placement tables included in the specification. These older versions always have an odd number of modules, and can be made in sizes ranging from 9 × 9 to 49 × 49. All symbols utilizing

1428-574: The code adds. The encoding process is described in the ISO/IEC standard 16022:2006. Open-source software for encoding and decoding the ECC-200 variant of Data Matrix has been published. The diagrams below illustrate the placement of the message data within a Data Matrix symbol. The message is "Misplaced Pages", and it is arranged in a somewhat complicated diagonal pattern starting near the upper-left corner. Some characters are split in two pieces, such as

1479-434: The code's ability to encode fifty characters in a symbol that is readable at 2 or 3 mm (0.003 or 0.005 sq in) and the fact that the code can be read with only a 20% contrast ratio. A Data Matrix is scalable; commercial applications exist with images as small as 300 micrometres (0.012 in) (laser etched on a 600-micrometre (0.024 in) silicon device) and as large as a 1 metre (3 ft) square (painted on

1530-427: The coding used, a "light" cell represents a 0 and a "dark" cell is a 1, or vice versa. Every Data Matrix is composed of two solid adjacent borders in an "L" shape (called the "finder pattern") and two other borders consisting of alternating dark and light "cells" or modules (called the "timing pattern"). Within these borders are rows and columns of cells encoding information. The finder pattern is used to locate and orient

1581-652: The core subjects. Ontario's education includes seven mandatory subjects: English, Second Language (French or Native), Mathematics, Science and Technology, Social Studies, Health and Physical Education and The Arts. English, French, Mathematics and Art are further divided into Reading, Writing, Oral Communication and Media Literacy for English, Listening, Speaking, Reading and Writing for Second Language, Number Sense and Numeration, Measurement, Geometry and Spatial Sense, Patterning and Algebra and Data Management and Probability for Mathematics, and Music, Visual Arts and Drama, and Dance for The Arts. Subject specific comments appear beside

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1632-455: The dimensions of their grades reports to be as long and wide as large index cards. Because of these card-like qualities, the creators and receivers of such print-based grade reports have historically called them "report cards." Although the dimensions, weight, and pliability of report cards change depending on their education systems, many institutions and districts now print grades reports/report cards on standard 8.5"x11" copy/printer paper. In

1683-489: The elements of which are encoded as bytes of 8 bits ; the byte b 7 b 6 b 5 b 4 b 3 b 2 b 1 b 0 {\displaystyle b_{7}b_{6}b_{5}b_{4}b_{3}b_{2}b_{1}b_{0}} with a standard numerical value ∑ i = 0 7 b i 2 i {\displaystyle \textstyle \sum _{i=0}^{7}b_{i}2^{i}} encodes

1734-419: The encoded data depends on the number of cells in the matrix. Error correction codes are often used to increase reliability: even if one or more cells are damaged so it is unreadable, the message can still be read. A Data Matrix symbol can store up to 2,335 alphanumeric characters. Data Matrix symbols are rectangular, usually square in shape and composed of square "cells" which represent bits . Depending on

1785-560: The end of each term. In elementary schools (grades 1–8), two separate report cards are used: The Elementary Progress Report, used between October 20 and November 20 of the school year, and the Elementary Provincial Report Card, used at the end of Term 1 (sent home between January 20 and February 20 of the academic year) and at the end of Term 2 (sent home toward the end of June of the school year). Kindergarten report cards are also provincially standardized as of

1836-404: The entire level of education, as well as any negative or positive critique the student is given, and all of his other school institution-related accomplishments are kept. In some elementary schools , students typically receive three to four report cards. The academic year is separated into three terms (Sept–Dec, Dec–Mar, Mar–June) and at the end of each term the student will get a report card. It

1887-619: The field element ∑ i = 0 7 b i α i {\displaystyle \textstyle \sum _{i=0}^{7}b_{i}\alpha ^{i}} where α ∈ F 256 {\displaystyle \alpha \in \mathbb {F} _{256}} is taken to be a primitive element satisfying α 8 + α 5 + α 3 + α 2 + 1 = 0 {\displaystyle \alpha ^{8}+\alpha ^{5}+\alpha ^{3}+\alpha ^{2}+1=0} . The primitive polynomial

1938-437: The grading period. For example; a semester goes from Sept–Jan and Jan–June. This would not count for summer school . Some school districts may administer the report card on a trimester or quarterly schedule as well. Additionally, in the United States, progress reports may be issued to track a student's performance in between report cards. They are typically issued at the midpoint of a grading period, (for example: 4½ weeks into

1989-399: The humanities, and especially for short writing samples, such as reaction papers or in-class writing. This serves as an alternative to a numerical or letter grade. Here a check means "acceptable" or " at the expected level", check plus means "better than expected", "good" or outstanding", and check minus means "below expectations", "unacceptable" and "bad". The system may also be supplemented by

2040-596: The initial W, and the third 'i' is in "corner pattern 2" rather than the usual L-shaped arrangement. Also shown are the end-of-message code (marked End), the padding (P) and error correction (E) bytes, and four modules of unused space (X). Multiple encoding modes are used to store different kinds of messages. The default mode stores one ASCII character per 8-bit codeword. Control codes are provided to switch between modes, as shown below. The C40, Text and X12 modes are potentially more compact for storing text messages. They are similar to DEC Radix-50 , using character codes in

2091-459: The length and data bytes are obscured by adding a pseudorandom value R(n), where n is the position in the byte stream. Prior to the expiration of US patent 5,612,524 in November 2007, intellectual property company Acacia Technologies claimed that Data Matrix was partially covered by its contents. As the patent owner, Acacia allegedly contacted Data Matrix users demanding license fees related to

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2142-404: The marks for each subject. Page 4 details the marking scale used on the report card, with spaces for Parent Comments and Signatures and for students to plan goals for the future. Possible marks include R (remediation required), I (insufficient evidence) D−, D, D+, C−, C, C+, B−, B, B+, A−, A, and A+. 'A' marks mean the student is exceeding the provincial standard, 'B' marks mean that they are meeting

2193-509: The patent. Cognex Corporation , a large manufacturer of 2D barcode devices, filed a declaratory judgment complaint on 13 March 2006 after receiving information that Acacia had contacted its customers demanding licensing fees. On 19 May 2008 Judge Joan N. Ericksen of the U.S. District Court in Minnesota ruled in favor of Cognex. The ruling held that the '524 patent, which claimed to cover a system for capturing and reading 2D symbology codes,

2244-510: The provincial standard, 'C' marks mean that the student is approaching the provincial standard and D marks mean that the student falls below the provincial standard. The grade 7 and 8 template has a few differences from the 1–6 report card. This report card displays the median for the subject/strand/course. Social Studies is also divided into History and Geography. The 7 and 8 report card offers percentage marks instead of letter grades. These marks are still viewed as equivalent letters as detailed in

2295-443: The range 0–39, and three of these codes are combined to make a number up to 40 =64000, which is packed into two bytes (maximum value 65536) as follows: The resulting value of B1 is in the range 0–250. The special value 254 is used to return to ASCII encoding mode. Character code interpretations are shown in the table below. The C40 and Text modes have four separate sets. Set 0 is the default, and contains codes that temporarily select

2346-403: The roof of a boxcar ). Fidelity of the marking and reading systems are the only limitation. The US Electronic Industries Alliance (EIA) recommends using Data Matrix for labeling small electronic components. Data Matrix codes are becoming common on printed media such as labels and letters. The code can be read quickly by a barcode reader which allows the media to be tracked, for example when

2397-403: The same term [REDACTED] This disambiguation page lists articles associated with the title DMC . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=DMC&oldid=1243770440 " Category : Disambiguation pages Hidden categories: Short description

2448-414: The symbol has sustained 30% damage, assuming the matrix can still be accurately located. Data Matrix has an error rate of less than 1 in 10 million characters scanned. Symbols have an even number of rows and an even number of columns. Most of the symbols are square with sizes from 10 × 10 to 144 × 144. Some symbols however are rectangular with sizes from 8×18 to 16×48 (even values only). All symbols using

2499-414: The symbol while the timing pattern provides a count of the number of rows and columns in the symbol. As more data is encoded in the symbol, the number of cells (rows and columns) increases. Each code is unique. Symbol sizes vary from 10×10 to 144×144 in the new version ECC 200, and from 9×9 to 49×49 in the old version ECC 000 – 140. The most popular application for Data Matrix is marking small items, due to

2550-454: The world's first animated tattoo utilizing a Data Matrix code in a collaborative process streamed live on Facebook. Data Matrix symbols are made up of modules arranged within a perimeter finder and timing pattern. It can encode up to 3,116 characters from the entire ASCII character set (with extensions). The symbol consists of data regions which contain modules set out in a regular array. Large symbols contain several regions. Each data region

2601-595: Was merged into RVSI/ Acuity CiMatrix , who were acquired by Siemens AG in October 2005 and Microscan Systems in September 2008. Data Matrix is covered today by several ISO / IEC standards and is in the public domain for many applications, which means it can be used free of any licensing or royalties. Data Matrix codes use Reed–Solomon error correction over the finite field F 256 {\displaystyle \mathbb {F} _{256}} (or GF(2 ) ),

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