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Luis Von Ahn
Luis von Ahn (; born 19 August 1978) is a Guatemalan-American entrepreneur and software developer. He is the founder of the company reCAPTCHA, which was sold to Google in 2009, and the co-founder and CEO of Duolingo. For these projects and others, von Ahn is known as one of the pioneers of crowdsourcing. von Ahn was a professor in the Computer Science Department at Carnegie Mellon University. Early life and education Luis von Ahn was born and raised in Guatemala City. He is of German descent. His mother was one of the first women in Guatemala to complete medical school. She gave birth to von Ahn at age 42, and raised him as a single mother. He attended the American School of Guatemala, a private English-language school in Guatemala City, an experience he cites as a great privilege. When von Ahn was eight years old, his mother bought him a Commodore 64 computer, beginning his fascination with technology and computer science. When he applied to colleges in the United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wikimania 2015
Wikimania is the Wikimedia movement's annual conference, organized by Wikimedian, volunteers and hosted by the Wikimedia Foundation. Topics of presentations and discussions include Wikimedia projects such as Wikipedia, other wikis, open-source software, free knowledge and free content, and social and technical aspects related to these topics. Since 2011, the winner of the Wikimedian of the Year award (known as the "Wikipedian of the Year" until 2017) has been announced at Wikimania. Conferences 2005 :m:Wikimania 2005, Wikimania 2005, the first Wikimania conference, was held from August 4 to 8, 2005 at the ''Haus der Jugend'' in Frankfurt, Germany, attracting about 380 attendees. The week of the conference included four "Hacking Days", from August 1 to 4, when some 25 developers gathered to work on code and discuss the technical aspects of MediaWiki and of running the Wikimedia projects. The main days of the conference, despite its billing as being "August 4–8", were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Salvador
El Salvador, officially the Republic of El Salvador, is a country in Central America. It is bordered on the northeast by Honduras, on the northwest by Guatemala, and on the south by the Pacific Ocean. El Salvador's capital and largest city is San Salvador. The country's population in 2024 was estimated to be 6 million according to a government census. Among the Mesoamerican nations that historically controlled the region are the Maya peoples, Maya, and then the Cuzcatlan, Cuzcatlecs. Archaeological monuments also suggest an early Olmec presence around the first millennium BC. In the beginning of the 16th century, the Spanish conquest of El Salvador, Spanish Empire conquered the Central American territory, incorporating it into the Viceroyalty of New Spain ruled from Mexico City. However, the Viceroyalty of New Spain had little to no influence in the daily affairs of the isthmus, which was colonized in 1524. In 1609, the area was declared the Captaincy General of Guatemala by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ESP Game
The ESP game (''extrasensory perception game'') is a human-based computation game developed to address the problem of creating difficult metadata. The idea behind the game is to use the computational power of humans to perform a task that computers cannot (originally, image recognition) by packaging the task as a game. It was originally conceived by Luis von Ahn of Carnegie Mellon University and first posted online in 2003. On the official website, there was a running count of "Labels collected since October 5, 2003", updated every 12 hours. They stated that "If the ESP game is played as much as other popular online games, we estimate that all the images on the Web can be labeled in a matter of weeks!" 36 million labels had been collected as of May 2008. The original paper (2004) reported that a pair of players can produce 3.89 ± 0.69 labels per minute. At this rate, 5,000 people continuously playing the game could provide one label per image indexed by Google (425 million) in 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Game With A Purpose
A human-based computation game or game with a purpose (GWAP) is a human-based computation technique of outsourcing steps within a computational process to humans in an entertaining way (gamification). Luis von Ahn first proposed the idea of "human algorithm games", or games with a purpose (GWAPs), in order to harness human time and energy for addressing problems that computers cannot yet tackle on their own. He believes that human intellect is an important resource and contribution to the enhancement of computer processing and human computer interaction. He argues that games constitute a general mechanism for using brainpower to solve open computational problems. In this technique, human brains are compared to processors in a distributed system, each performing a small task of a massive computation. However, humans require an incentive to become part of a collective computation. Online games are used as a means to encourage participation in the process. The tasks presented in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human-based Computation
Human-based computation (HBC), human-assisted computation, ubiquitous human computing or distributed thinking (by analogy to distributed computing) is a computer science technique in which a machine performs its function by outsourcing certain steps to humans, usually as microwork. This approach uses differences in abilities and alternative costs between humans and computer agents to achieve symbiotic human–computer interaction. For computationally difficult tasks such as image recognition, human-based computation plays a central role in training Deep Learning-based Artificial Intelligence systems. In this case, human-based computation has been referred to as human-aided artificial intelligence. In traditional computation, a human employs a computer to solve a problem; a human provides a formalized problem description and an algorithm to a computer, and receives a solution to interpret. Human-based computation frequently reverses the roles; the computer asks a person or a large g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discovery Channel
Discovery Channel, known as The Discovery Channel from 1985 to 1995, and often referred to as simply Discovery, is an American cable channel that is best known for its ongoing reality television shows and promotion of pseudoscience. It initially provided documentary television programming focused primarily on popular science, technology, and history, but by the 2010s had become increasingly dominated by programs that were reality television shows, promoted conspiracy theories, or advocated junk science. It is owned by Warner Bros. Discovery, a publicly traded company run by CEO David Zaslav. , Discovery Channel was the third most widely distributed subscription channel in the United States, behind now-sibling channel TBS and the Weather Channel; it is available in 409 million households worldwide, through its U.S. flagship channel and its various owned or licensed television channels internationally. , Discovery Channel is available to approximately 71,000,000 pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USA Today
''USA Today'' (often stylized in all caps) is an American daily middle-market newspaper and news broadcasting company. Founded by Al Neuharth in 1980 and launched on September 14, 1982, the newspaper operates from Gannett's corporate headquarters in New York City. Its newspaper is printed at 37 sites across the United States and at five additional sites internationally. The paper's dynamic design influenced the style of local, regional, and national newspapers worldwide through its use of concise reports, colorized images, informational graphics, and inclusion of popular culture stories, among other distinct features. As of 2023, ''USA Today'' has the fifth largest print circulation in the United States, with 132,640 print subscribers. It has two million digital subscribers, the fourth-largest online circulation of any U.S. newspaper. ''USA Today'' is distributed in all 50 states, Washington, D.C., and Puerto Rico, and an international edition is distributed in Asia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steganography
Steganography ( ) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination. In computing/electronic contexts, a computer file, message, image, or video is concealed within another file, message, image, or video. Generally, the hidden messages appear to be (or to be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a formal shared secret are forms of security through obscurity, while key-dependent steganographic schemes try to adhere to Kerckhoffs's principle. The word ''steganography'' comes from Greek ''steganographia'', which combines the words ''steganós'' (), meaning "covered or concealed", and ''-graphia'' () meaning "writing". The fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Langford (computer Scientist)
John Langford (born January 2, 1975) is a computer scientist working in machine learning and Computational learning theory, learning theory, a field that he says, "is shifting from an academic discipline to an industrial tool". He is well known for work on the Isomap embedding algorithm, CAPTCHA challenges, Cover tree, Cover Trees for nearest neighbor search, Multi-armed bandit#Contextual bandit, Contextual Bandits (which he coined) for reinforcement learning applications, and learning reductions. John is the author of the blog]hunch.netand the principal developer of Vowpal Wabbit. He works at Microsoft Research New York, of which he was one of the founding members, and was previously affiliated with Yahoo! Research, Toyota Technological Institute at Chicago, and IBM's Watson Research Center. He studied Physics and Computer Science at the California Institute of Technology, earning a double bachelor's degree in 1997, and he received his Ph.D. in computer science from Carnegie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), adversarial behavior. More generally, cryptography is about constructing and analyzing Communication protocol, protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security (confidentiality, data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, Smart card#EMV, chip-based payment cards, digital currencies, password, computer passwords, and military communications. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
