103-612: Pioneer Institute is a free-market think tank based in Boston, Massachusetts . The organization was founded in 1988 by Lovett C. Peters. Pioneer's stated mission is "to develop and communicate dynamic ideas that advance prosperity and a vibrant civic life in Massachusetts and beyond." Pioneer conducts research in the area of education reform, including charter schools and standards-based education. Pioneer's educational reform work strongly influenced education changes in Massachusetts in
206-581: A loss function . Variants of gradient descent are commonly used to train neural networks. Another type of local search is evolutionary computation , which aims to iteratively improve a set of candidate solutions by "mutating" and "recombining" them, selecting only the fittest to survive each generation. Distributed search processes can coordinate via swarm intelligence algorithms. Two popular swarm algorithms used in search are particle swarm optimization (inspired by bird flocking ) and ant colony optimization (inspired by ant trails ). Formal logic
309-475: A "degree of truth" between 0 and 1. It can therefore handle propositions that are vague and partially true. Non-monotonic logics , including logic programming with negation as failure , are designed to handle default reasoning . Other specialized versions of logic have been developed to describe many complex domains. Many problems in AI (including in reasoning, planning, learning, perception, and robotics) require
412-588: A Democrat, joined the Pioneer Institute in 2015 as Distinguished Senior Fellow in Education. The Institute also conducts research on healthcare policy, job and business creation, limited and effective state and local government, welfare reform, public pensions, public finance, and government transparency. 42°21′21″N 71°03′27″W / 42.3559°N 71.0574°W / 42.3559; -71.0574 Boston, Massachusetts Boston
515-490: A cannon barrage for two hours, but their shot could not reach the colonists' cannons at such a height. The British gave up, boarded their ships, and sailed away. This has become known as " Evacuation Day ", which Boston still celebrates each year on March 17. After this, Washington was so impressed that he made Rufus Putnam his chief engineer. After the Revolution, Boston's long seafaring tradition helped make it one of
618-460: A contradiction from premises that include the negation of the problem to be solved. Inference in both Horn clause logic and first-order logic is undecidable , and therefore intractable . However, backward reasoning with Horn clauses, which underpins computation in the logic programming language Prolog , is Turing complete . Moreover, its efficiency is competitive with computation in other symbolic programming languages. Fuzzy logic assigns
721-509: A million residents, and the most densely populated state capital. Some 1.2 million persons may be within Boston's boundaries during work hours, and as many as 2 million during special events. This fluctuation of people is caused by hundreds of thousands of suburban residents who travel to the city for work, education, health care, and special events. Artificial intelligence Artificial intelligence ( AI ), in its broadest sense,
824-475: A pair of bombs near the finish line of the Boston Marathon , killing three people and injuring roughly 264. The subsequent search for the bombers led to a lock-down of Boston and surrounding municipalities. The region showed solidarity during this time as symbolized by the slogan Boston Strong . In 2016, Boston briefly shouldered a bid as the U.S. applicant for the 2024 Summer Olympics . The bid
927-429: A path to a target goal, a process called means-ends analysis . Simple exhaustive searches are rarely sufficient for most real-world problems: the search space (the number of places to search) quickly grows to astronomical numbers . The result is a search that is too slow or never completes. " Heuristics " or "rules of thumb" can help prioritize choices that are more likely to reach a goal. Adversarial search
1030-610: A population of 4.9 million as of 2023, making it the largest in New England and the eleventh-largest in the country . Boston was founded on the Shawmut Peninsula in 1630 by Puritan settlers. The city was named after Boston, Lincolnshire , England. During the American Revolution , Boston was home to several events that proved central to the revolution and subsequent Revolutionary War , including
1133-565: A project to improve the historic West End neighborhood. Extensive demolition was met with strong public opposition, and thousands of families were displaced. The BRA continued implementing eminent domain projects, including the clearance of the vibrant Scollay Square area for construction of the modernist style Government Center . In 1965, the Columbia Point Health Center opened in the Dorchester neighborhood,
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#17327805970991236-478: A state of defence, that I could promise myself little success in attacking them under all the disadvantages I had to encounter. William Howe, 5th Viscount Howe , in a letter to William Legge, 2nd Earl of Dartmouth , about the British army's decision to leave Boston, dated March 21, 1776. Many crucial events of the American Revolution occurred in or near Boston. The then-town's mob presence, along with
1339-726: A tool that can be used for reasoning (using the Bayesian inference algorithm), learning (using the expectation–maximization algorithm ), planning (using decision networks ) and perception (using dynamic Bayesian networks ). Probabilistic algorithms can also be used for filtering, prediction, smoothing, and finding explanations for streams of data, thus helping perception systems analyze processes that occur over time (e.g., hidden Markov models or Kalman filters ). The simplest AI applications can be divided into two types: classifiers (e.g., "if shiny then diamond"), on one hand, and controllers (e.g., "if diamond then pick up"), on
1442-401: A violent tornado , the city itself has experienced many tornado warnings . Damaging storms are more common to areas north, west, and northwest of the city. See or edit raw graph data . In 2020, Boston was estimated to have 691,531 residents living in 266,724 households —a 12% population increase over 2010. The city is the third-most densely populated large U.S. city of over half
1545-669: A wide range of techniques, including search and mathematical optimization , formal logic , artificial neural networks , and methods based on statistics , operations research , and economics . AI also draws upon psychology , linguistics , philosophy , neuroscience , and other fields. Artificial intelligence was founded as an academic discipline in 1956, and the field went through multiple cycles of optimism, followed by periods of disappointment and loss of funding, known as AI winter . Funding and interest vastly increased after 2012 when deep learning outperformed previous AI techniques. This growth accelerated further after 2017 with
1648-490: A wide variety of techniques to accomplish the goals above. AI can solve many problems by intelligently searching through many possible solutions. There are two very different kinds of search used in AI: state space search and local search . State space search searches through a tree of possible states to try to find a goal state. For example, planning algorithms search through trees of goals and subgoals, attempting to find
1751-1139: Is intelligence exhibited by machines , particularly computer systems . It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. Such machines may be called AIs. Some high-profile applications of AI include advanced web search engines (e.g., Google Search ); recommendation systems (used by YouTube , Amazon , and Netflix ); interacting via human speech (e.g., Google Assistant , Siri , and Alexa ); autonomous vehicles (e.g., Waymo ); generative and creative tools (e.g., ChatGPT , and AI art ); and superhuman play and analysis in strategy games (e.g., chess and Go ). However, many AI applications are not perceived as AI: "A lot of cutting edge AI has filtered into general applications, often without being called AI because once something becomes useful enough and common enough it's not labeled AI anymore ." The various subfields of AI research are centered around particular goals and
1854-505: Is 2 °F (−17 °C) on December 30, 1917, while the record warm daily minimum is 83 °F (28 °C) on both August 2, 1975 and July 21, 2019. Boston averages 43.6 in (1,110 mm) of precipitation a year, with 49.2 in (125 cm) of snowfall per season. Most snowfall occurs from mid-November through early April, and snow is rare in May and October. There is also high year-to-year variability in snowfall; for instance,
1957-508: Is July, with a mean temperature of 74.1 °F (23.4 °C). The coldest month is January, with a mean temperature of 29.9 °F (−1.2 °C). Periods exceeding 90 °F (32 °C) in summer and below freezing in winter are not uncommon but tend to be fairly short, with about 13 and 25 days per year seeing each, respectively. Sub- 0 °F (−18 °C) readings usually occur every 3 to 5 years. The most recent sub- 0 °F (−18 °C) reading occurred on February 4, 2023, when
2060-641: Is a body of knowledge represented in a form that can be used by a program. An ontology is the set of objects, relations, concepts, and properties used by a particular domain of knowledge. Knowledge bases need to represent things such as objects, properties, categories, and relations between objects; situations, events, states, and time; causes and effects; knowledge about knowledge (what we know about what other people know); default reasoning (things that humans assume are true until they are told differently and will remain true even when other facts are changing); and many other aspects and domains of knowledge. Among
2163-459: Is an input, at least one hidden layer of nodes and an output. Each node applies a function and once the weight crosses its specified threshold, the data is transmitted to the next layer. A network is typically called a deep neural network if it has at least 2 hidden layers. Learning algorithms for neural networks use local search to choose the weights that will get the right output for each input during training. The most common training technique
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#17327805970992266-547: Is an intellectual, technological, and political center. However, it has lost some important regional institutions, including the loss to mergers and acquisitions of local financial institutions such as FleetBoston Financial , which was acquired by Charlotte -based Bank of America in 2004. Boston-based department stores Jordan Marsh and Filene's have both merged into the New York City –based Macy's . The 1993 acquisition of The Boston Globe by The New York Times
2369-462: Is an interdisciplinary umbrella that comprises systems that recognize, interpret, process, or simulate human feeling, emotion, and mood . For example, some virtual assistants are programmed to speak conversationally or even to banter humorously; it makes them appear more sensitive to the emotional dynamics of human interaction, or to otherwise facilitate human–computer interaction . However, this tends to give naïve users an unrealistic conception of
2472-444: Is an unsolved problem. Knowledge representation and knowledge engineering allow AI programs to answer questions intelligently and make deductions about real-world facts. Formal knowledge representations are used in content-based indexing and retrieval, scene interpretation, clinical decision support, knowledge discovery (mining "interesting" and actionable inferences from large databases ), and other areas. A knowledge base
2575-422: Is anything that perceives and takes actions in the world. A rational agent has goals or preferences and takes actions to make them happen. In automated planning , the agent has a specific goal. In automated decision-making , the agent has preferences—there are some situations it would prefer to be in, and some situations it is trying to avoid. The decision-making agent assigns a number to each situation (called
2678-413: Is classified based on previous experience. There are many kinds of classifiers in use. The decision tree is the simplest and most widely used symbolic machine learning algorithm. K-nearest neighbor algorithm was the most widely used analogical AI until the mid-1990s, and Kernel methods such as the support vector machine (SVM) displaced k-nearest neighbor in the 1990s. The naive Bayes classifier
2781-588: Is in Roxbury . Due north of the center we find the South End. This is not to be confused with South Boston which lies directly east from the South End. North of South Boston is East Boston and southwest of East Boston is the North End Unknown, A local colloquialism Boston has an area of 89.63 sq mi (232.1 km ). Of this area, 48.4 sq mi (125.4 km ), or 54%, of it
2884-413: Is labelled by a solution of the problem and whose leaf nodes are labelled by premises or axioms . In the case of Horn clauses , problem-solving search can be performed by reasoning forwards from the premises or backwards from the problem. In the more general case of the clausal form of first-order logic , resolution is a single, axiom-free rule of inference, in which a problem is solved by proving
2987-410: Is land and 41.2 sq mi (106.7 km ), or 46%, of it is water. The city's elevation, as measured at Logan International Airport , is 19 ft (5.8 m) above sea level . The highest point in Boston is Bellevue Hill at 330 ft (100 m) above sea level, and the lowest point is at sea level. The city is adjacent to Boston Harbor , an arm of Massachusetts Bay , and by extension,
3090-400: Is reportedly the "most widely used learner" at Google, due in part to its scalability. Neural networks are also used as classifiers. An artificial neural network is based on a collection of nodes also known as artificial neurons , which loosely model the neurons in a biological brain. It is trained to recognise patterns; once trained, it can recognise those patterns in fresh data. There
3193-804: Is the capital and most populous city in the Commonwealth of Massachusetts in the United States . The city serves as the cultural and financial center of the New England region of the Northeastern United States . It has an area of 48.4 sq mi (125 km ) and a population of 675,647 as of the 2020 census , making it the third-largest city in the Northeast after New York City and Philadelphia . The larger Greater Boston metropolitan statistical area has
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3296-404: Is the process of proving a new statement ( conclusion ) from other statements that are given and assumed to be true (the premises ). Proofs can be structured as proof trees , in which nodes are labelled by sentences, and children nodes are connected to parent nodes by inference rules . Given a problem and a set of premises, problem-solving reduces to searching for a proof tree whose root node
3399-440: Is used for game-playing programs, such as chess or Go. It searches through a tree of possible moves and counter-moves, looking for a winning position. Local search uses mathematical optimization to find a solution to a problem. It begins with some form of guess and refines it incrementally. Gradient descent is a type of local search that optimizes a set of numerical parameters by incrementally adjusting them to minimize
3502-455: Is used for reasoning and knowledge representation . Formal logic comes in two main forms: propositional logic (which operates on statements that are true or false and uses logical connectives such as "and", "or", "not" and "implies") and predicate logic (which also operates on objects, predicates and relations and uses quantifiers such as " Every X is a Y " and "There are some X s that are Y s"). Deductive reasoning in logic
3605-436: Is used in AI programs that make decisions that involve other agents. Machine learning is the study of programs that can improve their performance on a given task automatically. It has been a part of AI from the beginning. There are several kinds of machine learning. Unsupervised learning analyzes a stream of data and finds patterns and makes predictions without any other guidance. Supervised learning requires labeling
3708-905: Is when the knowledge gained from one problem is applied to a new problem. Deep learning is a type of machine learning that runs inputs through biologically inspired artificial neural networks for all of these types of learning. Computational learning theory can assess learners by computational complexity , by sample complexity (how much data is required), or by other notions of optimization . Natural language processing (NLP) allows programs to read, write and communicate in human languages such as English . Specific problems include speech recognition , speech synthesis , machine translation , information extraction , information retrieval and question answering . Early work, based on Noam Chomsky 's generative grammar and semantic networks , had difficulty with word-sense disambiguation unless restricted to small domains called " micro-worlds " (due to
3811-585: The Boston Garden opening in 1928. Logan International Airport opened on September 8, 1923. Boston went into decline by the early to mid-20th century, as factories became old and obsolete and businesses moved out of the region for cheaper labor elsewhere. Boston responded by initiating various urban renewal projects, under the direction of the Boston Redevelopment Authority (BRA) established in 1957. In 1958, BRA initiated
3914-724: The Boston Massacre (1770), the Boston Tea Party (1773), Paul Revere's Midnight Ride (1775), the Battle of Bunker Hill (1775), and the Siege of Boston (1775–1776). Following American independence from Great Britain , the city continued to play an important role as a port, manufacturing hub, and center for education and culture. The city also expanded significantly beyond the original peninsula by filling in land and annexing neighboring towns. Boston's many firsts include
4017-625: The Boston Public Library , Trinity Church, single-family homes and wooden/brick multi-family row houses. The South End Historic District is the largest surviving contiguous Victorian-era neighborhood in the US. The geography of downtown and South Boston was particularly affected by the Central Artery/Tunnel Project (which ran from 1991 to 2007, and was known unofficially as the " Big Dig "). That project removed
4120-537: The North End , and the Seaport . Boston is sometimes called a "city of neighborhoods" because of the profusion of diverse subsections. The city government's Office of Neighborhood Services has officially designated 23 neighborhoods: More than two-thirds of inner Boston's modern land area did not exist when the city was founded. Instead, it was created via the gradual filling in of the surrounding tidal areas over
4223-652: The South End , the West End , the Financial District , and Chinatown . After the Great Boston fire of 1872 , workers used building rubble as landfill along the downtown waterfront. During the mid-to-late 19th century, workers filled almost 600 acres (240 ha) of brackish Charles River marshlands west of Boston Common with gravel brought by rail from the hills of Needham Heights. The city annexed
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4326-520: The bar exam , SAT test, GRE test, and many other real-world applications. Machine perception is the ability to use input from sensors (such as cameras, microphones, wireless signals, active lidar , sonar, radar, and tactile sensors ) to deduce aspects of the world. Computer vision is the ability to analyze visual input. The field includes speech recognition , image classification , facial recognition , object recognition , object tracking , and robotic perception . Affective computing
4429-416: The transformer architecture , and by the early 2020s hundreds of billions of dollars were being invested in AI (known as the " AI boom "). The widespread use of AI in the 21st century exposed several unintended consequences and harms in the present and raised concerns about its risks and long-term effects in the future, prompting discussions about regulatory policies to ensure the safety and benefits of
4532-436: The " utility ") that measures how much the agent prefers it. For each possible action, it can calculate the " expected utility ": the utility of all possible outcomes of the action, weighted by the probability that the outcome will occur. It can then choose the action with the maximum expected utility. In classical planning , the agent knows exactly what the effect of any action will be. In most real-world problems, however,
4635-412: The 1970s, the city's economy had begun to recover after 30 years of economic downturn. A large number of high-rises were constructed in the Financial District and in Boston's Back Bay during this period. This boom continued into the mid-1980s and resumed after a few pauses. Hospitals such as Massachusetts General Hospital , Beth Israel Deaconess Medical Center , and Brigham and Women's Hospital lead
4738-457: The 19th century, Boston's core neighborhoods had become enclaves of ethnically distinct immigrants with their residence yielding lasting cultural change. Italians became the largest inhabitants of the North End , Irish dominated South Boston and Charlestown , and Russian Jews lived in the West End . Irish and Italian immigrants brought with them Roman Catholicism. Currently, Catholics make up Boston's largest religious community, and
4841-643: The 20th century: Horticultural Hall , the Tennis and Racquet Club , Isabella Stewart Gardner Museum , Fenway Studios , Jordan Hall , and the Boston Opera House . The Longfellow Bridge , built in 1906, was mentioned by Robert McCloskey in Make Way for Ducklings , describing its "salt and pepper shakers" feature. Fenway Park , home of the Boston Red Sox , opened in 1912, with
4944-598: The Atlantic Ocean. Boston is surrounded by the Greater Boston metropolitan region. It is bordered to the east by the town of Winthrop and the Boston Harbor Islands , to the northeast by the cities of Revere , Chelsea and Everett , to the north by the cities of Somerville and Cambridge , to the northwest by Watertown , to the west by the city of Newton and town of Brookline , to
5047-577: The English town ultimately derives from its patron saint, St. Botolph , in whose church John Cotton served as the rector until his emigration with Johnson. In early sources, Lincolnshire's Boston was known as "St. Botolph's town", later contracted to "Boston". Before this renaming, the settlement on the peninsula had been known as "Shawmut" by William Blaxton and "Tremontaine" by the Puritan settlers he had invited. Prior to European colonization ,
5150-512: The Irish have played a major role in Boston politics since the early 20th century; prominent figures include the Kennedys , Tip O'Neill , and John F. Fitzgerald . Between 1631 and 1890, the city tripled its area through land reclamation by filling in marshes, mud flats, and gaps between wharves along the waterfront. Reclamation projects in the middle of the century created significant parts of
5253-579: The John Hancock Tower is the old John Hancock Building with its prominent illuminated beacon , the color of which forecasts the weather. Downtown and its immediate surroundings (including the Financial District, Government Center, and South Boston ) consist largely of low-rise masonry buildings – often federal style and Greek revival – interspersed with modern high-rises. Back Bay includes many prominent landmarks, such as
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#17327805970995356-735: The Renew Boston Whole Building Incentive which reduces the cost of living in buildings that are deemed energy efficient. Under the Köppen climate classification , Boston has either a hot-summer humid continental climate (Köppen Dfa ) under the 0 °C (32.0 °F) isotherm or a humid subtropical climate (Köppen Cfa ) under the −3 °C (26.6 °F) isotherm. Summers are warm to hot and humid, while winters are cold and stormy, with occasional periods of heavy snow. Spring and fall are usually cool and mild, with varying conditions dependent on wind direction and
5459-561: The United States' first public park ( Boston Common , 1634), the first public school ( Boston Latin School , 1635), and the first subway system ( Tremont Street subway , 1897). Boston has emerged as a global leader in higher education and research and the largest biotechnology hub in the world. The city is also a national leader in scientific research, law, medicine, engineering, and business. With nearly 5,000 startup companies,
5562-471: The Western Hemisphere. The first European to live in what would become Boston was a Cambridge -educated Anglican cleric named William Blaxton . He was the person most directly responsible for the foundation of Boston by Puritan colonists in 1630. This occurred after Blaxton invited one of their leaders, Isaac Johnson , to cross Back Bay from the failing colony of Charlestown and share
5665-615: The act as an attempt to force them to accept the taxes established by the Townshend Acts . The act prompted the Boston Tea Party , where a group of angered Bostonians threw an entire shipment of tea sent by the East India Company into Boston Harbor . The Boston Tea Party was a key event leading up to the revolution, as the British government responded furiously with the Coercive Acts , demanding compensation for
5768-535: The adjacent towns of South Boston (1804), East Boston (1836), Roxbury (1868), Dorchester (including present-day Mattapan and a portion of South Boston ) (1870), Brighton (including present-day Allston ) (1874), West Roxbury (including present-day Jamaica Plain and Roslindale ) (1874), Charlestown (1874), and Hyde Park (1912). Other proposals were unsuccessful for the annexation of Brookline , Cambridge, and Chelsea . Many architecturally significant buildings were built during these early years of
5871-421: The agent can seek information to improve its preferences. Information value theory can be used to weigh the value of exploratory or experimental actions. The space of possible future actions and situations is typically intractably large, so the agents must take actions and evaluate situations while being uncertain of what the outcome will be. A Markov decision process has a transition model that describes
5974-510: The agent may not be certain about the situation they are in (it is "unknown" or "unobservable") and it may not know for certain what will happen after each possible action (it is not "deterministic"). It must choose an action by making a probabilistic guess and then reassess the situation to see if the action worked. In some problems, the agent's preferences may be uncertain, especially if there are other agents or humans involved. These can be learned (e.g., with inverse reinforcement learning ), or
6077-529: The agent to operate with incomplete or uncertain information. AI researchers have devised a number of tools to solve these problems using methods from probability theory and economics. Precise mathematical tools have been developed that analyze how an agent can make choices and plan, using decision theory , decision analysis , and information value theory . These tools include models such as Markov decision processes , dynamic decision networks , game theory and mechanism design . Bayesian networks are
6180-508: The angry colonists. This did not sit well with the colonists, however. In 1770, during the Boston Massacre , British troops shot into a crowd that had started to violently harass them. The colonists compelled the British to withdraw their troops. The event was widely publicized and fueled a revolutionary movement in America. In 1773, Parliament passed the Tea Act . Many of the colonists saw
6283-426: The area. Nevertheless, the city experienced conflict starting in 1974 over desegregation busing , which resulted in unrest and violence around public schools throughout the mid-1970s. Boston has also experienced gentrification in the latter half of the 20th century, with housing prices increasing sharply since the 1990s when the city's rent control regime was struck down by statewide ballot proposition . Boston
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#17327805970996386-605: The centuries. This was accomplished using earth from the leveling or lowering of Boston's three original hills (the "Trimountain", after which Tremont Street is named), as well as with gravel brought by train from Needham to fill the Back Bay . Christian Science Center , Copley Square , Newbury Street , and New England's two tallest buildings: the John Hancock Tower and the Prudential Center . Near
6489-460: The city government. A climate action plan from 2019 anticipates 2 ft (1 m) to more than 7 ft (2 m) of sea-level rise in Boston by the end of the 21st century. Many older buildings in certain areas of Boston are supported by wooden piles driven into the area's fill; these piles remain sound if submerged in water, but are subject to dry rot if exposed to air for long periods. Groundwater levels have been dropping in many areas of
6592-403: The city is considered a global pioneer in innovation and entrepreneurship , and more recently in artificial intelligence . Boston's economy also includes finance , professional and business services, information technology , and government activities. Boston households provide the highest average rate of philanthropy in the nation, and the city's businesses and institutions rank among
6695-464: The city often receives sea breezes , especially in the late spring, when water temperatures are still quite cold and temperatures at the coast can be more than 20 °F (11 °C) colder than a few miles inland, sometimes dropping by that amount near midday. Thunderstorms typically occur from May to September; occasionally, they can become severe, with large hail , damaging winds, and heavy downpours. Although downtown Boston has never been struck by
6798-443: The city's economy, and the city's industrial manufacturing overtook international trade in economic importance by the mid-19th century. The small rivers bordering the city and connecting it to the surrounding region facilitated shipment of goods and led to a proliferation of mills and factories. Later, a dense network of railroads furthered the region's industry and commerce. During this period, Boston flourished culturally as well. It
6901-414: The city, due in part to an increase in the amount of rainwater discharged directly into sewers rather than absorbed by the ground. The Boston Groundwater Trust coordinates monitoring groundwater levels throughout the city via a network of public and private monitoring wells. The city developed a climate action plan covering carbon reduction in buildings, transportation, and energy use. The first such plan
7004-594: The colonists' growing lack of faith in either Britain or its Parliament , fostered a revolutionary spirit there. When the British parliament passed the Stamp Act in 1765, a Boston mob ravaged the homes of Andrew Oliver , the official tasked with enforcing the Act, and Thomas Hutchinson , then the Lieutenant Governor of Massachusetts. The British sent two regiments to Boston in 1768 in an attempt to quell
7107-474: The commander-in-chief of the British forces in North America, led the British army in the siege. On June 17, the British captured Charlestown (now part of Boston) during the Battle of Bunker Hill . The British army outnumbered the militia stationed there, but it was a pyrrhic victory for the British because their army suffered irreplaceable casualties. It was also a testament to the skill and training of
7210-648: The common sense knowledge problem ). Margaret Masterman believed that it was meaning and not grammar that was the key to understanding languages, and that thesauri and not dictionaries should be the basis of computational language structure. Modern deep learning techniques for NLP include word embedding (representing words, typically as vectors encoding their meaning), transformers (a deep learning architecture using an attention mechanism), and others. In 2019, generative pre-trained transformer (or "GPT") language models began to generate coherent text, and by 2023, these models were able to get human-level scores on
7313-475: The creation of Boston baked beans . Boston's economy stagnated in the decades prior to the Revolution. By the mid-18th century, New York City and Philadelphia had surpassed Boston in wealth. During this period, Boston encountered financial difficulties even as other cities in New England grew rapidly. The weather continuing boisterous the next day and night, giving the enemy time to improve their works, to bring up their cannon, and to put themselves in such
7416-664: The destroyed tea from the Bostonians. This angered the colonists further and led to the American Revolutionary War . The war began in the area surrounding Boston with the Battles of Lexington and Concord . Boston itself was besieged for almost a year during the siege of Boston , which began on April 19, 1775. The New England militia impeded the movement of the British Army . Sir William Howe , then
7519-584: The early 1990s. The Institute created a fellowship program to train charter school entrepreneurs, which in 2003 became a separate non-profit organization, the Building Excellent Schools Foundation , which trains charter operators around the nation. The Boston Globe wrote that the Pioneer Institute "has a national profile as the brains of the Common Core opposition." Former Massachusetts Senate President Tom Birmingham ,
7622-466: The elevated Central Artery and incorporated new green spaces and open areas. Boston is located within the Boston Basin ecoregion , which is characterized by low and rolling hills with a number of ponds, lakes, and reservoirs. Forests are mainly transition hardwoods such as oak - hickory mixed with white pine . As a coastal city built largely on fill , sea-level rise is of major concern to
7725-541: The first Community Health Center in the United States. It mostly served the massive Columbia Point public housing complex adjoining it, which was built in 1953. The health center is still in operation and was rededicated in 1990 as the Geiger-Gibson Community Health Center. The Columbia Point complex itself was redeveloped and revitalized from 1984 to 1990 into a mixed-income residential development called Harbor Point Apartments. By
7828-461: The first wave of European immigrants . Irish immigrants dominated the first wave of newcomers during this period, especially following the Great Famine ; by 1850, about 35,000 Irish lived in Boston . In the latter half of the 19th century, the city saw increasing numbers of Irish, Germans , Lebanese , Syrians, French Canadians , and Russian and Polish Jews settling there. By the end of
7931-461: The fortifications and dozens of cannons on Dorchester Heights that Henry Knox had laboriously brought through the snow from Fort Ticonderoga . The astonished British awoke the next morning to see a large array of cannons bearing down on them. General Howe is believed to have said that the Americans had done more in one night than his army could have done in six months. The British Army attempted
8034-440: The intelligence of existing computer agents. Moderate successes related to affective computing include textual sentiment analysis and, more recently, multimodal sentiment analysis , wherein AI classifies the affects displayed by a videotaped subject. A machine with artificial general intelligence should be able to solve a wide variety of problems with breadth and versatility similar to human intelligence . AI research uses
8137-537: The late 1980s and 1990s, methods were developed for dealing with uncertain or incomplete information, employing concepts from probability and economics . Many of these algorithms are insufficient for solving large reasoning problems because they experience a "combinatorial explosion": They become exponentially slower as the problems grow. Even humans rarely use the step-by-step deduction that early AI research could model. They solve most of their problems using fast, intuitive judgments. Accurate and efficient reasoning
8240-536: The militia, as their stubborn defense made it difficult for the British to capture Charlestown without suffering further irreplaceable casualties. Several weeks later, George Washington took over the militia after the Continental Congress established the Continental Army to unify the revolutionary effort. Both sides faced difficulties and supply shortages in the siege, and the fighting
8343-457: The most difficult problems in knowledge representation are the breadth of commonsense knowledge (the set of atomic facts that the average person knows is enormous); and the sub-symbolic form of most commonsense knowledge (much of what people know is not represented as "facts" or "statements" that they could express verbally). There is also the difficulty of knowledge acquisition , the problem of obtaining knowledge for AI applications. An "agent"
8446-634: The nation in medical innovation and patient care. Schools such as the Boston Architectural College , Boston College , Boston University , the Harvard Medical School , Tufts University School of Medicine , Northeastern University , Massachusetts College of Art and Design , Wentworth Institute of Technology , Berklee College of Music , the Boston Conservatory , and many others attract students to
8549-572: The nation's busiest ports for both domestic and international trade. Boston's harbor activity was significantly curtailed by the Embargo Act of 1807 (adopted during the Napoleonic Wars ) and the War of 1812 . Foreign trade returned after these hostilities, but Boston's merchants had found alternatives for their capital investments in the meantime. Manufacturing became an important component of
8652-419: The official name from the "Town of Boston" to the "City of Boston", and on March 19, 1822, the people of Boston accepted the charter incorporating the city. At the time Boston was chartered as a city, the population was about 46,226, while the area of the city was only 4.8 sq mi (12 km ). In the 1820s, Boston's population grew rapidly, and the city's ethnic composition changed dramatically with
8755-405: The other hand. Classifiers are functions that use pattern matching to determine the closest match. They can be fine-tuned based on chosen examples using supervised learning . Each pattern (also called an " observation ") is labeled with a certain predefined class. All the observations combined with their class labels are known as a data set . When a new observation is received, that observation
8858-564: The peninsula. The Puritans made the crossing in September 1630. Puritan influence on Boston began even before the settlement was founded with the 1629 Cambridge Agreement . This document created the Massachusetts Bay Colony and was signed by its first governor John Winthrop . Puritan ethics and their focus on education also influenced the early history of the city. America's first public school, Boston Latin School ,
8961-461: The position of the jet stream . Prevailing wind patterns that blow offshore minimize the influence of the Atlantic Ocean. However, in winter, areas near the immediate coast often see more rain than snow, as warm air is sometimes drawn off the Atlantic. The city lies at the border between USDA plant hardiness zones 6b (away from the coastline) and 7a (close to the coastline). The hottest month
9064-411: The probability that a particular action will change the state in a particular way and a reward function that supplies the utility of each state and the cost of each action. A policy associates a decision with each possible state. The policy could be calculated (e.g., by iteration ), be heuristic , or it can be learned. Game theory describes the rational behavior of multiple interacting agents and
9167-630: The region surrounding present-day Boston was inhabited by the Massachusett people who had small, seasonal communities. When a group of settlers led by John Winthrop arrived in 1630, the Shawmut Peninsula was nearly empty of the Native people, as many had died of European diseases brought by early settlers and traders. Archaeological excavations unearthed one of the oldest fishweirs in New England on Boylston Street , which Native people constructed as early as 7,000 years before European arrival in
9270-606: The southwest by the town of Dedham and small portions of Needham and Canton , and to the southeast by the town of Milton , and the city of Quincy . The Charles River separates Boston's Allston-Brighton , Fenway-Kenmore and Back Bay neighborhoods from Watertown and Cambridge, and most of Boston from its own Charlestown neighborhood. The Neponset River forms the boundary between Boston's southern neighborhoods and Quincy and Milton . The Mystic River separates Charlestown from Chelsea and Everett, and Chelsea Creek and Boston Harbor separate East Boston from Downtown ,
9373-471: The technology . The general problem of simulating (or creating) intelligence has been broken into subproblems. These consist of particular traits or capabilities that researchers expect an intelligent system to display. The traits described below have received the most attention and cover the scope of AI research. Early researchers developed algorithms that imitated step-by-step reasoning that humans use when they solve puzzles or make logical deductions . By
9476-509: The temperature dipped down to −10 °F (−23 °C); this was the lowest temperature reading in the city since 1957. In addition, several decades may pass between 100 °F (38 °C) readings; the last such reading occurred on July 24, 2022. The city's average window for freezing temperatures is November 9 through April 5. Official temperature records have ranged from −18 °F (−28 °C) on February 9, 1934, up to 104 °F (40 °C) on July 4, 1911. The record cold daily maximum
9579-612: The top in the nation for environmental sustainability and new investment. Isaac Johnson , in one of his last official acts as the leader of the Charlestown community before he died on September 30, 1630, named the then-new settlement across the river "Boston". The settlement's name came from Johnson's hometown of Boston, Lincolnshire , from which he, his wife (namesake of the Arbella ) and John Cotton (grandfather of Cotton Mather ) had emigrated to New England . The name of
9682-451: The training data with the expected answers, and comes in two main varieties: classification (where the program must learn to predict what category the input belongs in) and regression (where the program must deduce a numeric function based on numeric input). In reinforcement learning , the agent is rewarded for good responses and punished for bad ones. The agent learns to choose responses that are classified as "good". Transfer learning
9785-420: The use of particular tools. The traditional goals of AI research include reasoning , knowledge representation , planning , learning , natural language processing , perception, and support for robotics . General intelligence —the ability to complete any task performable by a human on an at least equal level—is among the field's long-term goals. To reach these goals, AI researchers have adapted and integrated
9888-467: The winter of 2011–12 saw only 9.3 in (23.6 cm) of accumulating snow, but the previous winter, the corresponding figure was 81.0 in (2.06 m). The city's coastal location on the North Atlantic makes the city very prone to nor'easters , which can produce large amounts of snow and rain. Fog is fairly common, particularly in spring and early summer. Due to its coastal location,
9991-736: Was admired for its rarefied literary life and generous artistic patronage . Members of old Boston families—eventually dubbed the Boston Brahmins —came to be regarded as the nation's social and cultural elites. They are often associated with the American upper class , Harvard University , and the Episcopal Church . Boston was a prominent port of the Atlantic slave trade in the New England Colonies , but
10094-549: Was commissioned in 2007, with updates released in 2011, 2014, and 2019. This plan includes the Building Energy Reporting and Disclosure Ordinance, which requires the city's larger buildings to disclose their yearly energy and water use statistics and to partake in an energy assessment every five years. A separate initiative, Resilient Boston Harbor, lays out neighborhood-specific recommendations for coastal resilience . In 2013, Mayor Thomas Menino introduced
10197-468: Was founded in Boston in 1635. Boston was the largest town in the Thirteen Colonies until Philadelphia outgrew it in the mid-18th century. Boston's oceanfront location made it a lively port , and the then-town primarily engaged in shipping and fishing during its colonial days. Boston was a primary stop on a Caribbean trade route and imported large amounts of molasses, which led to
10300-433: Was limited to small-scale raids and skirmishes. The narrow Boston Neck, which at that time was only about a hundred feet wide, impeded Washington's ability to invade Boston, and a long stalemate ensued. A young officer, Rufus Putnam , came up with a plan to make portable fortifications out of wood that could be erected on the frozen ground under cover of darkness. Putnam supervised this effort, which successfully installed both
10403-614: Was reversed in 2013 when it was resold to Boston businessman John W. Henry . In 2016, it was announced General Electric would be moving its corporate headquarters from Connecticut to the Seaport District in Boston, joining many other companies in this rapidly developing neighborhood. The city also saw the completion of the Central Artery/Tunnel Project, known as the Big Dig , in 2007 after many delays and cost overruns. On April 15, 2013, two Chechen Islamist brothers detonated
10506-535: Was soon overtaken by Salem, Massachusetts and Newport, Rhode Island . Boston eventually became a center of the American abolitionist movement . The city reacted largely negatively to the Fugitive Slave Act of 1850 , contributing to President Franklin Pierce 's attempt to make an example of Boston after Anthony Burns 's attempt to escape to freedom. In 1822, the citizens of Boston voted to change
10609-543: Was supported by the mayor and a coalition of business leaders and local philanthropists, but was eventually dropped due to public opposition. The USOC then selected Los Angeles to be the American candidate with Los Angeles ultimately securing the right to host the 2028 Summer Olympics . Nevertheless, Boston is one of eleven U.S. cities which will host matches during the 2026 FIFA World Cup , with games taking place at Gillette Stadium . The geographical center of Boston
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