Parchive (a portmanteau of parity archive, and formally known as Parity Volume Set Specification) is an erasure code system that produces par files for checksum verification of data integrity, with the capability to perform data recovery operations that can repair or regenerate corrupted or missing data. Parchive was originally written to solve the problem of reliable file sharing on Usenet, but it is now commonly used for protecting any kind of data from data corruption, bit rot, and accidental or malicious damage. Despite the name, Parchive uses more advanced techniques that do not utilize simplistic parity methods of error detection and correction.
The original SourceForge Parchive project has been inactive since November 9, 2010. As of 2014, Par1 is obsolete, Par2 is mature for widespread use, and Par3 is an experimental version being developed by MultiPar author Yutaka Sawada.
Parchive was intended to increase the reliability of transferring files via Usenet newsgroups. Usenet was originally designed for informal conversations, and the underlying protocol, NNTP was not designed to transmit arbitrary binary data. Another limitation, which was acceptable for conversations but not for files, was that messages were normally fairly short in length and limited to 7-bit ASCII text.
In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth's Moon.
The world's first artificial satellite, the Sputnik 1, was launched by the Soviet Union in 1957. Since then, thousands of satellites have been launched into orbit around the Earth. Some satellites, notably space stations, have been launched in parts and assembled in orbit. Artificial satellites originate from more than 40 countries and have used the satellite launching capabilities of ten nations. About a thousand satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Mercury, Venus, Mars, Jupiter, Saturn, Vesta, Eros, Ceres, and the Sun.
A satellite is a subviral agent composed of nucleic acid that depends on the co-infection of a host cell with a helper or master virus for its replication. When a satellite encodes the coat protein in which its nucleic acid is encapsidated it is referred to as a satellite virus. A satellite virus of mamavirus that inhibits the replication of its host has been termed a virophage. However, the usage of this term remains controversial due to the lack of fundamental differences between virophages and classical satellite viruses.
The genomes of satellites range upward from 359 nucleotides in length for Satellite Tobacco Ringspot Virus RNA (STobRV).
Satellite viral particles should not be confused with satellite DNA.
PARTechnologyCorporation (NYSE. PAR) (“PAR Technology” or the “Company”) today announced its financial results for the second quarter ended June 30, 2022 ... PAR Technology CEO, Savneet Singh commented, “PAR delivered strong results in the second quarter, setting the stage for a stronger second half ... About PAR Technology Corporation.
The sixth SpaceX launch in the month of July saw a new batch of Starlink satellites on Sunday ... Hence, despite getting the better of other satellite-internet service providers courtesy its exclusive usage of LEO (low-Earth orbit) satellites, Starlink has a long way to go to be at par with the Fiber.
How a history of achievements has changed weather forecasting Smile! First images arrive from new GOES-18 weather satellite 'Cannibal' solar flare triggers spectacular Northern Lights show ... GOES-18 launched from Florida in March 2021 and is the third NOAA’s GOES-R geostationary satellite series.
“We believe that the introduction of affordable satellite connectivity that enables access to resources for remote communities almost at par with well-connected urban areas creates immense incentives for entrepreneurship and innovation,” shares Alaa Alsadi, Business DevelopmentDirector – Middle East & Africa, IEC Telecom Group.
... office always, " SirfAamir khan ke Naam se hi movie chalti hai uski because normal theatre-going audience Aamir khan ki movie dekhne zyada jaati because his movies are shown daily on tv, satellite-like 3 idiots, pk, Dhoom 3, Taare Zameen par, secret superstar, Ghajini, dangal".
Fabriqué par Thales Alenia Space, le premier satellite en bande C de SES destiné à libérer les 300 MHz inférieurs de ce spectre, opèrera depuis la position orbitale de 135 degrés Ouest et délivrera des services TV et radio à des millions de foyers américains, ainsi que d’autres services de transmission de données critiques.
Tirant parti de l’IA et des capacités de traitement du serveur, Work for Humankind peut désormais analyser et transférer uniquement les images les plus pertinentes par satellite, pour une classification et une évaluation ultérieures par son équipe basée sur le continent.
Contents ... The constant problem that has dogged the Mavic 3 throughout its lifetime so far has been the abysmal speed at which it acquires a satellite connection ... Once it knows roughly where it is, I find that it immediately acquires all the satellites it needs. In my estimation, it’s now at least on par with the Air 2S and Mini 3 Pro drones ... ....
Basé sur la plateforme Airoha AG3352, le LC76G peut en même temps recevoir et traiter les signaux venant de toutes les constellations (GPS, GLONASS, BeiDou, Galileo et QZSS), ce qui, conjointement à la prise en charge de systèmes d'augmentation par satellite (SBAS), permet de ...
Sa charge utile est gérée par le logiciel ARC (AdaptiveResourceControl), qui rend le satellite interopérable avec le système de communication par satellite de deuxième génération O3b mPOWER de SES en orbite terrestre moyenne (MEO), dont le déploiement débutera ces prochains mois.
The official referred to satellite series of Nahid and Pars 1 Zafar as among those ready to launch ... Nahid 2, weighing 120 kg, is aimed at reaching telecommunications satellite in the geostationary orbit ... Pars 1 is another one with 110 to 120 kg, the satellite is among the most modern indigenous satellites in Iran and it is in row of launch.
The spacecraft that are planned for the 2023 launch include the already manufactured Iranian Nahid, Pars-1 and Zafar satellites, while the remaining satellites are still under construction, Salarieh was cited as saying by the IRNA. The satellite series of ...
Aujourd’hui, Ecopia AI a annoncé l’extension de son partenariat avec Airbus qui associe la technologie de cartographie vectorielle 3D à grande échelle d’Ecopia aux capacités mondiales d’imagerie par satellite d’Airbus ... SECURITY SATELLITE TECHNOLOGY AEROSPACE PHOTOGRAPHY MANUFACTURING SOFTWARE.
China is rolling out the DigitalSilkRoad in the Pacific, using its Pacific embassies to set up ground stations for its Beidou satellite navigation system ...Ground stations and reference stations work together to provide centimeter-level accuracy for satellites.