Supervised learningSupervised learning (SL) is a paradigm in machine learning where input objects (for example, a vector of predictor variables) and a desired output value (also known as human-labeled supervisory signal) train a model. The training data is processed, building a function that maps new data on expected output values. An optimal scenario will allow for the algorithm to correctly determine output values for unseen instances. This requires the learning algorithm to generalize from the training data to unseen situations in a "reasonable" way (see inductive bias).
Self-supervised learningSelf-supervised learning (SSL) is a paradigm in machine learning for processing data of lower quality, rather than improving ultimate outcomes. Self-supervised learning more closely imitates the way humans learn to classify objects. The typical SSL method is based on an artificial neural network or other model such as a decision list. The model learns in two steps. First, the task is solved based on an auxiliary or pretext classification task using pseudo-labels which help to initialize the model parameters.
Mesoamerican ballcourtA Mesoamerican ballcourt (tlachtli) is a large masonry structure of a type used in Mesoamerica for more than 2,700 years to play the Mesoamerican ballgame, particularly the hip-ball version of the ballgame. More than 1,300 ballcourts have been identified, 60% in the last 20 years alone. Although there is a tremendous variation in size, in general all ballcourts are the same shape: a long narrow alley flanked by two walls with horizontal, vertical, and sloping faces.
SyllabaryIn the linguistic study of written languages, a syllabary is a set of written symbols that represent the syllables or (more frequently) moras which make up words. A symbol in a syllabary, called a syllabogram, typically represents an (optional) consonant sound (simple onset) followed by a vowel sound (nucleus)—that is, a CV or V syllable—but other phonographic mappings, such as CVC, CV- tone, and C (normally nasals at the end of syllables), are also found in syllabaries.
Character (symbol)A character is a semiotic sign or symbol, or a glyph - typically a letter, a numerical digit, an ideogram, a hieroglyph, a punctuation mark or another typographic mark. The Ancient Greek word χαρακτήρ ('charaktēr') is an agent noun of the verb χαράσσω (charassō) with a meaning "to sharpen, to whet", and also "to make cake", from a PIE root "cut" also continued in Irish gearr and English gash, which is perhaps an early loan ultimately from the same Greek root.
Writing systemA writing system is a method of visually representing verbal communication, based on a script and a set of rules regulating its use. While both writing and speech are useful in conveying messages, writing differs in also being a reliable form of information storage and transfer. Writing systems require shared understanding between writers and readers of the meaning behind the sets of characters that make up a script.
CaracolCaracol is a large ancient Maya archaeological site, located in what is now the Cayo District, of Belize. It is situated approximately south of Xunantunich, and the town of San Ignacio, and from the Macal River. It rests on the Vaca Plateau, at an elevation of above sea-level, in the foothills of the Maya Mountains. Long thought to be a tertiary center, it is now known that the site was one of the most important regional political centers of the Maya Lowlands during the Classic Period.
Sociology of the InternetThe sociology of the Internet involves the application of sociological theory and method to the Internet as a source of information and communication. The overlapping field of digital sociology focuses on understanding the use of digital media as part of everyday life, and how these various technologies contribute to patterns of human behavior, social relationships, and concepts of the self. Sociologists are concerned with the social implications of the technology; new social networks, virtual communities and ways of interaction that have arisen, as well as issues related to cyber crime.
RongorongoRongorongo (pron. ˈrɒŋɡoʊˈrɒŋɡoʊ; Rapa Nui: ˈɾoŋoˈɾoŋo) is a system of glyphs discovered in the 19th century on Rapa Nui (Easter Island) that appears to be writing or proto-writing. Numerous attempts at decipherment have been made, with none being successful. Although some calendrical and what might prove to be genealogical information has been identified, none of these glyphs can actually be read. If rongorongo does prove to be writing and proves to be an independent invention, it would be one of very few independent inventions of writing in human history.
Ancient GreeceAncient Greece (Hellás) was a northeastern Mediterranean civilization, existing from the Greek Dark Ages of the 12th–9th centuries BC to the end of classical antiquity (600 AD), that comprised a loose collection of culturally and linguistically related city-states and other territories. Most of these regions were officially unified only once, for 13 years, under Alexander the Great's empire from 336 to 323 BC (though this excludes a number of Greek city-states free from Alexander's jurisdiction in the western Mediterranean, around the Black Sea, Cyprus, and Cyrenaica).
