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Bram Cohen
Bram Cohen is an American computer programmer, best known as the author of the peer-to-peer (P2P) BitTorrent protocol in 2001, as well as the first file sharing program to use the protocol, also known as BitTorrent. He is also the co-founder of CodeCon and organizer of the San Francisco Bay Area P2P-hackers meeting, was the co-author of Codeville and creator of the Chia cryptocurrency which implements the proof of space-time consensus algorithm. Early life and career Cohen grew up in the Upper West Side of Manhattan, New York City, as the son of a teacher and computer scientist. He claims he learned the BASIC programming language at the age of 5 on his family's Timex Sinclair computer. Cohen passed the American Invitational Mathematics Examination to qualify for the United States of America Mathematical Olympiad while he attended Stuyvesant High School in New York City. He is also an alumnus of the Hampshire College Summer Studies in Mathematics program. He graduated from Stuyv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the List of United States cities by population density, most densely populated major city in the United States, and is more than twice as populous as second-place Los Angeles. New York City lies at the southern tip of New York (state), New York State, and constitutes the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the world by urban area, urban landmass. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous Megacity, megacities, and over 58 million people live within of the city. New York City is a global city, global Culture of New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proof Of Space-time
Proof of space (PoS) is a type of consensus algorithm achieved by demonstrating one's legitimate interest in a service (such as sending an email) by allocating a non-trivial amount of memory or disk space to solve a challenge presented by the service provider. The concept was formulated in 2013 by Dziembowski ''et al.'' and (with a different formulation) by Ateniese ''et al.''. Proofs of space are very similar to proofs of work (PoW), except that instead of computation, storage is used to earn cryptocurrency. Proof-of-space is different from memory-hard functions in that the bottleneck is not in the number of memory access events, but in the amount of memory required. After the release of Bitcoin, alternatives to its PoW mining mechanism were researched, and PoS was studied in the context of cryptocurrencies. Proofs of space are seen as a fairer and greener alternative by blockchain enthusiasts due to the general-purpose nature of storage and the lower energy cost required ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upload
Uploading refers to ''transmitting'' data from one computer system to another through means of a network. Common methods of uploading include: uploading via web browsers, FTP clients], and computer terminal, terminals (SCP/ SFTP). Uploading can be used in the context of (potentially many) clients that send files to a central server. While uploading can also be defined in the context of sending files between distributed clients, such as with a peer-to-peer (P2P) file-sharing protocol like BitTorrent, the term file sharing is more often used in this case. Moving files within a computer system, as opposed to over a network, is called file copying. Uploading directly contrasts with downloading, where data is ''received'' over a network. In the case of users uploading files over the internet, uploading is often slower than downloading as many internet service providers (ISPs) offer asymmetric connections, which offer more network bandwidth for downloading than uploading. Def ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Download
In computer networks, download means to ''receive'' data from a remote system, typically a server such as a web server, an FTP server, an email server, or other similar system. This contrasts with uploading, where data is ''sent to'' a remote server. A ''download'' is a computer file, file offered for downloading or that has been downloaded, or the process of receiving such a file. Definition Downloading generally transfers entire files for local storage and later use, as contrasted with streaming, where the data is used nearly immediately, while the transmission is still in progress, and which may not be stored long-term. Websites that offer streaming media or media displayed in-browser, such as YouTube, increasingly place restrictions on the ability of users to save these materials to their computers after they have been received. Downloading is not the same as data transfer; moving or copying data between two storage devices would be data transfer, but ''receiving'' data ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MojoNation
Mnet is software to run a peer-to-peer distributed data store for file sharing purpose. It aimed at substituting free sharing of digital resources, typical of P2P networks, with a market regulated by its own currency. Mnet is a fork of the software MojoNation. Evil Geniuses for a Better Tomorrow Evil Geniuses for a Better Tomorrow was a startup company founded by Jim McCoy et al. to create MojoNation. The company's name comes from the game Illuminati by Steve Jackson Games. After several years, the company ran out of money and laid off most of its employees; Bram Cohen went on to create BitTorrent and Zooko Wilcox-O'Hearn created Mnet out of MojoNation's source code and contributed later to the Tahoe-LAFS. Mojonation ceased operation as a commercial enterprise in February 2002, when it was replaced by the noncommercial Mnet project. MojoNation At the time it was first publicly released, MojoNation included several notable features: Evil Geniuses Transport Protocol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dot-com Company
A dot-com company, or simply a dot-com (alternatively rendered dot.com, dot com, dotcom or .com), is a company that does most of its business on the Internet, usually through a website on the World Wide Web that uses the popular top-level domain ".com". As of 2021, .com is by far the most used TLD, with almost half of all registrations. The suffix .com in a URL usually (but not always) refers to a commercial or for-profit entity, as opposed to a non-commercial entity or non-profit organization, which usually use .org. The name for the domain came from the word ''commercial'', as that is the main intended use. Since the .com companies are web-based, often their products or services are delivered via web-based mechanisms, even when physical products are involved. On the other hand, some .com companies do not offer any physical products. History Origin of the .com domain (1985-1991) The .com top-level domain (TLD) was one of the first seven created when the Internet was first i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University At Buffalo
The State University of New York at Buffalo, commonly called the University at Buffalo (UB) and sometimes called SUNY Buffalo, is a public research university with campuses in Buffalo and Amherst, New York. The university was founded in 1846 as a private medical college and merged with the State University of New York system in 1962. It is one of the two flagship institutions of the SUNY system. As of fall 2020, the university enrolled 32,347 students in 13 schools and colleges, making it the largest and most comprehensive public university in the state of New York. Since its founding by a group which included future United States President Millard Fillmore, the university has evolved from a small medical school to a large research university. Today, in addition to the College of Arts and Sciences, the university houses the largest state-operated medical school, dental school, education school, business school, engineering school, and pharmacy school, and is also home to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hampshire College Summer Studies In Mathematics
Hampshire (, ; abbreviated to Hants) is a ceremonial and non-metropolitan county in western South East England on the coast of the English Channel. Home to two major English cities on its south coast, Southampton and Portsmouth, Hampshire is the 9th-most populous county in England. The county town of Hampshire is Winchester, located in the north of the county. The county is bordered by Dorset to the south-west, Wiltshire to the north-west, Berkshire to the north, Surrey to the north-east, and West Sussex to the south east. The county is geographically diverse, with upland rising to and mostly south-flowing rivers. There are areas of downland and marsh, and two national parks: the New Forest and part of the South Downs, which together cover 45 per cent of Hampshire. Settled about 14,000 years ago, Hampshire's recorded history dates to Roman Britain, when its chief town was Venta Belgarum (now Winchester). The county was recorded in Domesday Book as divided into 44 hundred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Of America Mathematical Olympiad
The United States of America Mathematical Olympiad (USAMO) is a highly selective high school mathematics competition held annually in the United States. Since its debut in 1972, it has served as the final round of the American Mathematics Competitions. In 2010, it split into the USAMO and the United States of America Junior Mathematical Olympiad (USAJMO). Qualification for the USAMO or USAJMO is considered one of the most prestigious awards for high school students in the United States. Top scorers on both six-question, nine-hour mathematical proof competitions are invited to join the Mathematical Olympiad Program to compete and train to represent the United States at the International Mathematical Olympiad. Eligibility In order to be eligible to take the USAMO, a participant must be either a U.S. citizen or a legal resident of the United States or Canada. Only U.S. permanent residents and citizens may join the American IMO team. In addition, all participants, regardless of geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Invitational Mathematics Examination
The American Invitational Mathematics Examination (AIME) is a highly selective and prestigious 15-question 3-hour test given since 1983 to those who rank in the top 5% on the AMC 12 high school mathematics examination (formerly known as the AHSME), and starting in 2010, those who rank in the top 2.5% on the AMC 10. Two different versions of the test are administered, the AIME I and AIME II. However, qualifying students can only take one of these two competitions. The AIME is the second of two tests used to determine qualification for the United States Mathematical Olympiad (USAMO), the first being the AMC. The use of calculators is not allowed on the test. Format and scoring The competition consists of 15 questions of increasing difficulty, where each answer is an integer between 0 and 999 inclusive. Thus the competition effectively removes the element of chance afforded by a multiple-choice test while preserving the ease of automated grading; answers are entered onto an OMR sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timex Sinclair
Timex Sinclair was a joint venture established in December 1982 between the British company Sinclair Research and Timex Corporation in an effort to gain an entry into the rapidly growing early-1980s home computer market in North America. History The choice of partnership was natural, as Timex was already the main contractor for manufacture of Sinclair's ZX81 and ZX Spectrum computers at its Scottish plant in Dundee. Due to large demand another manufacturer was needed, so Timex Portugal (''TMX Portugal Lda'', a Portuguese Timex subsidiary), with skilled and relatively cheap labor force, took on the production of models to be exported to the U.S. Although both the Scottish Timex branch and Timex Portugal were full subsidiaries of Timex, internal rivalry meant there was little sharing between the two plants. Timex Portugal sold the Timex Sinclair (ex: T/S 2068) models in Portugal and Poland under the ''Timex Computer'' (ex: TC 2068) brand. In order to market Timex Sinclair pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
