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CERN Open Hardware License
The CERN Open Hardware Licence (OHL or CERN OHL) is an open-source hardware licence created by CERN. The licence comes in three variants: strongly reciprocal (CERN-OHL-S), weakly reciprocal (CERN-OHL-W), and permissive (CERN-OHL-P). History The CERN OHL licence was created as an initiative of the members of the Open Hardware Repository, a knowledge-exchange project of electronics designers working in experimental-physics laboratories, founded by CERN engineers, to regulate the use of the designs published by CERN. Version 1 Version 1.0 was published in March 2011. Following community feedback, Version 1.1 was published in July 2011 to follow the generally accepted principles of the free and open-source movements and make it easier for use by entities other than CERN. Version 1.2, published in September 2013, removed the obligation for licensees that modified a CERN OHL-licensed design to notify upstream licensors about the changes and introduced a notion of "Documentation Loca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open-source Hardware
Open-source hardware (OSH, OSHW) consists of physical artifact (software development), artifacts of technology designed and offered by the open-design movement. Both free and open-source software (FOSS) and open-source hardware are created by this open-source#Society, open-source culture movement and apply a like concept to a variety of components. It is sometimes, thus, referred to as free and open-source hardware (FOSH), meaning that the design is easily available ("open") and that it can be used, modified and shared freely ("free"). The term usually means that information about the hardware is easily discerned so that others can make it – coupling it closely to the maker culture, maker movement. Hardware design (i.e. mechanical drawings, circuit diagram, schematics, bills of material, printed circuit board, PCB layout data, hardware description language, HDL source code and integrated circuit layout data), in addition to the software that device driver, drives the hardware, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GitHub
GitHub () is a Proprietary software, proprietary developer platform that allows developers to create, store, manage, and share their code. It uses Git to provide distributed version control and GitHub itself provides access control, bug tracking system, bug tracking, software feature requests, task management, continuous integration, and wikis for every project. Headquartered in California, GitHub, Inc. has been a subsidiary of Microsoft since 2018. It is commonly used to host open source software development projects. GitHub reported having over 100 million developers and more than 420 million Repository (version control), repositories, including at least 28 million public repositories. It is the world's largest source code host Over five billion developer contributions were made to more than 500 million open source projects in 2024. About Founding The development of the GitHub platform began on October 19, 2005. The site was launched in April 2008 by Tom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Content
Free content, libre content, libre information, or free information is any kind of creative work, such as a work of art, a book, a software, software program, or any other creative Media (communication), content for which there are very minimal copyright and other legal limitations on usage, modification and distribution. These are works or expressions which can be freely studied, applied, copied and modified by anyone for any purpose including, in some cases, commercial purposes. Free content encompasses all works in the public domain and also those copyrighted works whose licenses honor and uphold the definition of free cultural work. In most countries, the Berne Convention grants copyright holders control over their creations by default. Therefore, copyrighted content must be explicitly declared free by the authors, which is usually accomplished by referencing or including licensing statements from within the work. The right to reuse such a work is granted by the authors in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cooking Recipe
A recipe is a set of instructions that describes how to prepare or make something, especially a dish of prepared food. A sub-recipe or subrecipe is a recipe for an ingredient that will be called for in the instructions for the main recipe. Recipe books (also called cookbooks or cookery books) are a collection of recipes, help reflect cultural identities and social changes as well as serve as educational tools. History Early examples The earliest known written recipes date to 1730 BC and were recorded on cuneiform tablets found in Mesopotamia. Other early written recipes date from approximately 1600 BC and come from an Akkadian tablet from southern Babylonia. There are also works in ancient Egyptian hieroglyphs depicting the preparation of food. Many ancient Greek recipes are known. Mithaecus's cookbook was an early one, but most of it has been lost; Athenaeus quotes one short recipe in his ''Deipnosophistae''. Athenaeus mentions many other cookbooks, all of them lost.Andr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libre Software Meeting
The Libre Software Meeting (LSM) is an annual free software event originally held in France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan .... The French name of this event is Rencontres mondiales du logiciel libre (RMLL). Summary The Libre Software Meeting takes place each year since 2000, in July. Launched by the French free software users group Association Bordelaise des utilisateurs de logiciels libres ( ABUL). More than 1000 people, coming from more than 50 countries, participate each year. The LSM is a mix of two complementary meetings: * a developers meeting, free software coders coming to discuss about their projects during the event * a free software promotion event dedicated to a large audience Organisation The LSM is organized by a team of volunteers, combining loc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Free Beer
Free Beer is a beer brand collaboration between students of IT University of Copenhagen and the artist collective Superflex initiated in 2004. The recipe of the beer is published under a Creative Commons license, granting others the right to freely use and distribute it. History Vores Øl In December 2004, a group of students from the IT University of Copenhagen, in partnership with Superflex, brewed a batch of beer in the university's cafeteria. The group named the beer "Vores Øl" (Danish for "Our Beer"), inspired by a 1994 Carlsberg beer advertisement slogan. They launched a website to promote the project and released the beer’s recipe and label design under the Creative Commons CC BY-SA 2.5 license. Since cooking recipes are not protected by copyright, the share-alike licensing approach used is legally questionable and had not been tested in any court of law. Free Beer The developers of the beer stated that they wanted to raise awareness of the "dogmatic notion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UPSat
UPSat was the first satellite manufactured in Greece to be successfully launched into orbit, by the University of Patras and Libre Space Foundation (an earlier Greek-made communications satellite, HELMARS-SAT, although entirely constructed by 1999, was not launched due to budget limitations). It was part of the QB50 mission with ID GR-02. The UPSat mission was the first satellite launched into orbit made entirely of open-source software and open-source hardware. Open-source The UPSat mission developed an open-source hardware and software 2U cubesat, minimizing the use of commercial off the shelf components, and providing hardware and software designs under the provisions of the CERN-OHLv2 and GNU-GPLv3 licenses respectfully. The vast majority of its components were designed from scratch in an open-source software and hardware way. Mission UPSat, as part of the QB50 cubesat constellation, was launched to the International Space Station at April 18, 2017 11:11 EDT at Cape Can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tristimulus Colorimeter
A tristimulus colorimeter, colloquially shortened to ''colorimeter'' or ''colourimeter'', is used in digital imaging to profile and calibrate output devices. It takes a limited number of wideband spectral energy readings along the visible spectrum by using filtered photodetectors; e.g. silicon photodiodes. A colorimeter with the known value of absolute error allows measuring (x,y)-chromaticity coordinates in red, green, blue and white colors. Measured values are used for calculation of LCD profile coefficients. Originally, three glass filters whose transmittance spectra mimicked the CIE color matching functions (shown below) were employed. A filter bank may be used to decompose the individual color matching functions if more accuracy is desired. A camera or colorimeter is said to be ''colorimetric'' if it satisfies the by (1868–1945) (also called the "Maxwell–Ives criterion"), reducing observer metamerism color errors, if the product of the spectral responsivity of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tinkerforge
Tinkerforge is an open-source hardware platform of stackable microcontroller building blocks (Bricks) that can control different modules (Bricklets). The primary communication interface of the building blocks can be extended using Master Extensions. The hardware can be controlled by external programs written in C, C++, C#, Object Pascal, Java, Perl, PHP, Python, Ruby, Shell and VB.NET over a USB, Wi-Fi or Ethernet connection, and running on Windows, Linux and macOS. This non-embedded programming approach eliminates the typical requirements and limitations (development tools, limited availability of RAM and processing power) of conventional embedded software development (such as Arduino). Tinkerforge hardware and software are both open source, and all files are hosted on GitHub. The CHIP (magazine), computer magazine Chip awarded Tinkerforge 2012 the "Product of the Year" award.These are the winners of the CHIP AWARDS 2012' Bricks Bricks are cm circuit boards. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synchrotron
A synchrotron is a particular type of cyclic particle accelerator, descended from the cyclotron, in which the accelerating particle beam travels around a fixed closed-loop path. The strength of the magnetic field which bends the particle beam into its closed path increases with time during the accelerating process, being ''synchronized'' to the increasing kinetic energy of the particles. The synchrotron is one of the first accelerator concepts to enable the construction of large-scale facilities, since bending, beam focusing and acceleration can be separated into different components. The most powerful modern particle accelerators use versions of the synchrotron design. The largest synchrotron-type accelerator, also the largest particle accelerator in the world, is the Large Hadron Collider (LHC) near Geneva, Switzerland, completed in 2008 by the European Organization for Nuclear Research (CERN). It can accelerate beams of protons to an energy of 7 electron volt, teraelectro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SatNOGS
SatNOGS (Satellite Networked Open Ground Station) project is a free software and open source hardware platform aimed to create a satellite ground station network. The scope of the project is to create a full stack of open technologies based on open standards, and the construction of a full ground station as a showcase of the stack. History The SatNOGS project was initiated during NASA SpaceApps Challenge in 2014 at Athens Hackerspace. The project then took part in and won the first place of the Hackaday Prize 2014 competition. SatNOGS is currently a project of the Libre Space Foundation. Overview SatNOGS aims to provide a stack of technologies needed for a distributed network of low Earth orbit satellite ground stations. In order to implement such a stack the four following different sub-projects are developed Network SatNOGS Network is a web application for scheduling observations across the network of ground stations. Database SatNOGS Database is a crowd-source ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycroft (software)
Mycroft was a free and open-source software virtual assistant that uses a natural language user interface. Its code was formerly copyleft, but is now under a permissive license. It was named after a fictional computer from the 1966 science fiction novel '' The Moon Is a Harsh Mistress''. Unusually for a voice-controlled assistant, Mycroft did all of its processing locally, not on a cloud server belonging to the vendor. It could access online resources, but it could also function without an internet connection. In early 2023, Mycroft AI ceased development. A community-driven platform continues with OpenVoiceOS. History Inspiration for Mycroft came when Ryan Sipes and Joshua Montgomery were visiting a makerspace in Kansas City, MO, where they came across a simple and basic intelligent virtual assistant project. They were interested in the technology, but did not like its inflexibility. Montgomery believes that the burgeoning industry of intelligent personal assistance poses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
