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Baeza-Yates
Ricardo A. Baeza-Yates (born March 21, 1961) is a Chilean-Catalan computer scientist that currently is a Research Professor at the Institute for Experiential AI of Northeastern University in the Silicon Valley campus. He is also part-time professor at Universitat Pompeu Fabra in Barcelona and Universidad de Chile in Santiago. He is an expert member of the Global Partnership on Artificial Intelligence, a member of Spain's Advisory Council on AI, and a member of the Association for Computing Machinery's US Technology Policy Subcommittee on AI and Algorithms. From June 2016 until June 2020 he was CTO of NTENT, a semantic search technology company. Before, until February 2016, he was VP of Research for Yahoo! Labs, leading teams in United States, Europe and Latin America. He obtained a Ph.D. from the University of Waterloo with ''Efficient Text Searching'', supervised by Gaston Gonnet and granted in 1989. His research interests include: * Algorithms and data structures. His cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitap Algorithm
The bitap algorithm (also known as the shift-or, shift-and or Baeza-Yates–Gonnet algorithm) is an approximate string matching algorithm. The algorithm tells whether a given text contains a substring which is "approximately equal" to a given pattern, where approximate equality is defined in terms of Levenshtein distance if the substring and pattern are within a given distance ''k'' of each other, then the algorithm considers them equal. The algorithm begins by precomputing a set of bitmasks containing one bit for each element of the pattern. Then it is able to do most of the work with bitwise operations, which are extremely fast. The bitap algorithm is perhaps best known as one of the underlying algorithms of the Unix utility agrep, written by Udi Manber, Sun Wu, and Burra Gopal. Manber and Wu's original paper gives extensions of the algorithm to deal with fuzzy matching of general regular expressions. Due to the data structures required by the algorithm, it performs best on pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shift Or Algorithm
The bitap algorithm (also known as the shift-or, shift-and or Baeza-Yates–Gonnet algorithm) is an approximate string matching algorithm. The algorithm tells whether a given text contains a substring which is "approximately equal" to a given pattern, where approximate equality is defined in terms of Levenshtein distance if the substring and pattern are within a given distance ''k'' of each other, then the algorithm considers them equal. The algorithm begins by precomputing a set of bitmasks containing one bit for each element of the pattern. Then it is able to do most of the work with bitwise operations, which are extremely fast. The bitap algorithm is perhaps best known as one of the underlying algorithms of the Unix utility agrep, written by Udi Manber, Sun Wu, and Burra Gopal. Manber and Wu's original paper gives extensions of the algorithm to deal with fuzzy matching of general regular expressions. Due to the data structures required by the algorithm, it performs best on pat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Retrieval
Information retrieval (IR) in computing and information science is the process of obtaining information system resources that are relevant to an information need from a collection of those resources. Searches can be based on full-text or other content-based indexing. Information retrieval is the science of searching for information in a document, searching for documents themselves, and also searching for the metadata that describes data, and for databases of texts, images or sounds. Automated information retrieval systems are used to reduce what has been called information overload. An IR system is a software system that provides access to books, journals and other documents; stores and manages those documents. Web search engines are the most visible IR applications. Overview An information retrieval process begins when a user or searcher enters a query into the system. Queries are formal statements of information needs, for example search strings in web search engines. In inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fuzzy String Searching
In computer science, approximate string matching (often colloquially referred to as fuzzy string searching) is the technique of finding strings that match a pattern approximately (rather than exactly). The problem of approximate string matching is typically divided into two sub-problems: finding approximate substring matches inside a given string and finding dictionary strings that match the pattern approximately. Overview The closeness of a match is measured in terms of the number of primitive operations necessary to convert the string into an exact match. This number is called the edit distance between the string and the pattern. The usual primitive operations are: * insertion: ''cot'' → ''coat'' * deletion: ''coat'' → ''cot'' * substitution: ''coat'' → ''cost'' These three operations may be generalized as forms of substitution by adding a NULL character (here symbolized by *) wherever a character has been deleted or inserted: * insertion: ''co*t'' → ''coat'' * delet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Structure
In computer science, a data structure is a data organization, management, and storage format that is usually chosen for efficient access to data. More precisely, a data structure is a collection of data values, the relationships among them, and the functions or operations that can be applied to the data, i.e., it is an algebraic structure about data. Usage Data structures serve as the basis for abstract data types (ADT). The ADT defines the logical form of the data type. The data structure implements the physical form of the data type. Different types of data structures are suited to different kinds of applications, and some are highly specialized to specific tasks. For example, relational databases commonly use B-tree indexes for data retrieval, while compiler implementations usually use hash tables to look up identifiers. Data structures provide a means to manage large amounts of data efficiently for uses such as large databases and internet indexing services. Usually, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universitat Pompeu Fabra
Pompeu Fabra University ( ca, Universitat Pompeu Fabra, UPF, ; es, link=no, Universidad Pompeu Fabra) is a public university located in the city of Barcelona, Catalonia in Spain. The university was created by the Autonomous Government of Catalonia in 1990 and was named after Pompeu Fabra. UPF has been ranked the best university in Spain since 2015 and 16th best young university in the world in 2022 by the Times Higher Education World University Rankings. Pompeu Fabra University is considered one of the most prestigious universities in Spain. It has occupied first place in the national ranking of scientific productivity since 2009. Academically, the university is known for its selective student admission as more than half of the degrees offered by it have among the highest university entrance grades (''selectivitat'') in the Catalan university system. The university excels in national and international rankings especially in the studies of economics, political science, and law. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yahoo! Labs
Yahoo! Labs served as Yahoo!'s research arm, aiming to develop research in technologies to be used within the company. Yahoo! Labs includes approximately 200 research scientists and engineers. Yahoo! Labs is headquartered in Sunnyvale, CA; it has three additional locations worldwide: New York, London - England; and Haifa - Israel. Yahoo Labs Barcelona was closed in early 2015. On February 17, 2016, Yahoo! announced that Yahoo! Labs was being replaced with Yahoo! Research. History In July 2005, Usama Fayyad (Yahoo!’s Chief Data Officer), Prabhakar Raghavan, Andrew Tomkins, Kevin Lang, and other employees who were working for the former "Yahoo! Research Labs" organization formed the new research team. Raghavan was named as Head of Yahoo! Research. Ronald J. Brachman, having finished a term as office director at DARPA, joined as the head of worldwide research operations in early September. The team was soon joined by Andrei Broder and Ricardo Baeza-Yates. Yahoo! Labs was f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pompeu Fabra University
Pompeu Fabra University ( ca, Universitat Pompeu Fabra, UPF, ; es, link=no, Universidad Pompeu Fabra) is a public university located in the city of Barcelona, Catalonia in Spain. The university was created by the Autonomous Government of Catalonia in 1990 and was named after Pompeu Fabra. UPF has been ranked the best university in Spain since 2015 and 16th best young university in the world in 2022 by the Times Higher Education World University Rankings. Pompeu Fabra University is considered one of the most prestigious universities in Spain. It has occupied first place in the national ranking of scientific productivity since 2009. Academically, the university is known for its selective student admission as more than half of the degrees offered by it have among the highest university entrance grades (''selectivitat'') in the Catalan university system. The university excels in national and international rankings especially in the studies of economics, political science, and law. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of University Of Waterloo People
The University of Waterloo, located in Waterloo, Ontario, Canada, is a comprehensive public university that was founded in 1957 by Drs. Gerry Hagey and Ira G. Needles. It has grown into an institution of more than 42,000 students, faculty, and staff. The school is notable for being the first accredited university in North America to create a Faculty of Mathematics, which is now the world's largest, and to have the largest cooperative education program in the world. The school is also known for having more companies formed by its faculty, students, and alumni than any other Canadian university, and as such, the university has been called the "Silicon Valley of the North". The list is drawn from notable faculty, alumni, staff, and former university presidents. The enrollment for 2020 was 36,057 undergraduate and 6,231 graduate students, with 1,350 faculty members and 2,596 staff. About 221,000 people have graduated from the university, and now reside in over 150 countries. Alum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaston Gonnet
Gaston H. Gonnet is a Uruguayan Canadian computer scientist and entrepreneur. He is best known for his contributions to the Maple computer algebra system and the creation of a digital version of the Oxford English Dictionary. Education and early life Gonnet received his doctorate in computer science from the University of Waterloo in 1977. His thesis was entitled ''Interpolation and Interpolation-Hash Searching''. His advisor was J. Alan George. Career and research In 1980 Gonnet co-founded the Symbolic Computation Group at the University of Waterloo. The work of SCG on a general-purpose computer algebra system later formed the core of the Maple system. In 1988, Gonnet co-founded (with Keith Geddes) the private company Waterloo Maple Inc., to sell Maple commercially. In the mid 1990s the company ran into trouble and a disagreement between his colleagues caused him to withdraw from chairman of the Board and managerial involvement. In 1984 Gonnet co-founded the New Oxford ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Association For Information Science And Technology
The Association for Information Science and Technology (ASIS&T) is a nonprofit membership organization for information professionals that sponsors an annual conference as well as several serial publications, including the ''Journal of the Association for Information Science and Technology'' (JAsIST). The organization provides administration and communications support for its various divisions, known as special-interest groups or SIGs; provides administration for geographically defined chapters; connects job seekers with potential employers; and provides organizational support for continuing education programs for information professionals. Founded as the American Documentation Institute (ADI) in 1937, the group became the American Society for Information Science (ASIS) in 1968 to reflect the organization's interest in "all aspects of the information transfer process" such as, "designing, managing and using information systems and technology." Updating its name in 2000, the Ameri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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