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Emma Haruka Iwao
Emma Haruka Iwao is a Japanese computer scientist and cloud developer advocate at Google. In 2019 Haruka Iwao calculated the then world record for most accurate value of pi (π); which included 31.4 trillion digits, exceeding the previous record of 22 trillion. This record was surpassed in 2020 by Timothy Mullican who calculated 50 trillion digits, but she reclaimed the record in 2022 with 100 trillion digits. She identifies as queer. Early life and education As a child, Iwao became interested in pi. She was inspired by Japanese mathematicians, including Yasumasa Kanada. She studied computer science at the University of Tsukuba, where she was taught by Daisuke Takahashi. She was awarded the Dean's Award for Excellence in 2008, before starting graduate studies in computing. Her master's dissertation considered high performance computer systems. After graduating, Iwao took on several software engineering positions, working on site reliability for Panasonic, GREE and Red Hat. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tsukuba
is a public university, public research university located in Tsukuba, Ibaraki Prefecture, Ibaraki, Japan. It is a top 10 Designated National University, and was ranked Type A by the Japanese government as part of the Top Global University Project. The university has 28 college clusters and schools with around 16,500 students (as of 2014). The main Tsukuba campus covers an area of 258 hectares (636 acres), making it the second largest single campus in Japan. The university branch campus is in Bunkyō, Bunkyo-ku, Tokyo, offering graduate programs for working adults in the capital and managing K-12 schools in Tokyo that are attached to the university. Features The university is primarily focused on STEMM fields (Science, Technology, Engineering, Mathematics, Medicine), physical education, and related interdisciplinary fields. This focus is reflected by the university's location in the heart of Tsukuba Science City, alongside over 300 other research institutions. The univer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daisuke Takahashi (mathematician)
Daisuke Takahashi is a full professor of computer science at the University of Tsukuba, specializing in high-performance numerical computing. Education and career Takahashi received a bachelor's degree in engineering in 1993 and a master's degree in engineering in 1995, both from Toyohashi University of Technology. He completed a Ph.D. in information science from the University of Tokyo in 1999. After working as a researcher at the University of Tokyo and at Saitama University, he joined the University of Tsukuba in 2001. Research Takahashi's works include several records of the number of digits of the approximation of Pi. His work on the computation of Pi has inspired his former student Emma Haruka Iwao, who broke a new record on March 14, 2019. In 2011, he was part of a team from the University of Tsukuba that won the Gordon Bell Prize of the Association for Computing Machinery for their work simulating the quantum state In quantum physics, a quantum state is a mathematical en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chronology Of Computation Of π
The table below is a brief chronology of computed numerical values of, or bounds on, the mathematical constant pi (). For more detailed explanations for some of these calculations, see Approximations of . The last 100 decimal digits of the latest 2022 world record computation are: 4658718895 1242883556 4671544483 9873493812 1206904813 2656719174 5255431487 2142102057 7077336434 3095295560 Before 1400 1400–1949 1949–2009 2009–present See also * History of pi *Approximations of π Approximations for the mathematical constant pi () in the history of mathematics reached an accuracy within 0.04% of the true value before the beginning of the Common Era. In Chinese mathematics, this was improved to approximations correct to ... References External links * Borwein, Jonathan,The Life of Pi {{DEFAULTSORT:Chronology Of Computation Of Pi Pi History of mathematics Pi Pi algorithms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Y-cruncher
The Chudnovsky algorithm is a fast method for calculating the digits of , based on Ramanujan’s formulae. It was published by the Chudnovsky brothers in 1988. It was used in the world record calculations of 2.7 trillion digits of in December 2009, 10 trillion digits in October 2011, 22.4 trillion digits in November 2016, 31.4 trillion digits in September 2018–January 2019, 50 trillion digits on January 29, 2020, 62.8 trillion digits on August 14, 2021, and 100 trillion digits on March 21, 2022. Algorithm The algorithm is based on the negated Heegner number d = -163 , the ''j''-function j \left(\tfrac\right) = -640320^3, and on the following rapidly convergent generalized hypergeometric series: : \frac = 12 \sum^\infty_ \frac A detailed proof of this formula can be found here: For a high performance iterative implementation, this can be simplified to : \frac=\frac = \sum^\infty_ \frac There are 3 big integer terms (the multinomial term ''Mq'', the linear term ''Lq'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multithreading (computer Architecture)
In computer architecture, multithreading is the ability of a central processing unit (CPU) (or a single core in a multi-core processor) to provide multiple threads of execution concurrently, supported by the operating system. This approach differs from multiprocessing. In a multithreaded application, the threads share the resources of a single or multiple cores, which include the computing units, the CPU caches, and the translation lookaside buffer (TLB). Where multiprocessing systems include multiple complete processing units in one or more cores, multithreading aims to increase utilization of a single core by using thread-level parallelism, as well as instruction-level parallelism. As the two techniques are complementary, they are combined in nearly all modern systems architectures with multiple multithreading CPUs and with CPUs with multiple multithreading cores. Overview The multithreading paradigm has become more popular as efforts to further exploit instruction-level p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicago Tribune
The ''Chicago Tribune'' is a daily newspaper based in Chicago, Illinois, United States, owned by Tribune Publishing. Founded in 1847, and formerly self-styled as the "World's Greatest Newspaper" (a slogan for which WGN radio and television are named), it remains the most-read daily newspaper in the Chicago metropolitan area and the Great Lakes region. It had the sixth-highest circulation for American newspapers in 2017. In the 1850s, under Joseph Medill, the ''Chicago Tribune'' became closely associated with the Illinois politician Abraham Lincoln, and the Republican Party's progressive wing. In the 20th century under Medill's grandson, Robert R. McCormick, it achieved a reputation as a crusading paper with a decidedly more American-conservative anti-New Deal outlook, and its writing reached other markets through family and corporate relationships at the ''New York Daily News'' and the ''Washington Times-Herald.'' The 1960s saw its corporate parent owner, Tribune Company, rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York Post
The ''New York Post'' (''NY Post'') is a conservative daily tabloid newspaper published in New York City. The ''Post'' also operates NYPost.com, the celebrity gossip site PageSix.com, and the entertainment site Decider.com. It was established in 1801 by Federalist and Founding Father Alexander Hamilton, and became a respected broadsheet in the 19th century under the name ''New York Evening Post''. Its most famous 19th-century editor was William Cullen Bryant. In the mid-20th century, the paper was owned by Dorothy Schiff, a devoted liberal, who developed its tabloid format. In 1976, Rupert Murdoch bought the ''Post'' for US$30.5 million. Since 1993, the ''Post'' has been owned by Murdoch's News Corp. Its distribution ranked 4th in the US in 2019. History 19th century The ''Post'' was founded by Alexander Hamilton with about US$10,000 () from a group of investors in the autumn of 1801 as the ''New-York Evening Post'', a broadsheet. Hamilton's co-investors included other New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evening Standard
The ''Evening Standard'', formerly ''The Standard'' (1827–1904), also known as the ''London Evening Standard'', is a local free daily newspaper in London, England, published Monday to Friday in tabloid format. In October 2009, after being purchased by Russian businessman Alexander Lebedev, the paper ended a 180-year history of paid circulation and became a free newspaper, doubling its circulation as part of a change in its business plan. Emily Sheffield became editor in July 2020 but resigned in October 2021. History From 1827 to 2009 The newspaper was founded by barrister Stanley Lees Giffard on 21 May 1827 as ''The Standard''. The early owner of the paper was Charles Baldwin. Under the ownership of James Johnstone, ''The Standard'' became a morning paper from 29 June 1857. ''The Evening Standard'' was published from 11 June 1859. ''The Standard'' gained eminence for its detailed foreign news, notably its reporting of events of the American Civil War (1861–1865 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terabyte
The byte is a units of information, unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character (computing), character of text in a computer and for this reason it is the smallest address space, addressable unit of Computer memory, memory in many computer architectures. To disambiguate arbitrarily sized bytes from the common 8-bit computing, 8-bit definition, Computer network, network protocol documents such as Internet Protocol, The Internet Protocol () refer to an 8-bit byte as an Octet (computing), octet. Those bits in an octet are usually counted with numbering from 0 to 7 or 7 to 0 depending on the Endianness#Bit endianness, bit endianness. The first bit is number 0, making the eighth bit number 7. The size of the byte has historically been Computer hardware, hardware-dependent and no definitive standards existed that mandated the size. Sizes from 1 to 48 bits have been used. The six- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloud Computing
Cloud computing is the on-demand availability of computer system resources, especially data storage ( cloud storage) and computing power, without direct active management by the user. Large clouds often have functions distributed over multiple locations, each of which is a data center. Cloud computing relies on sharing of resources to achieve coherence and typically uses a "pay as you go" model, which can help in reducing capital expenses but may also lead to unexpected operating expenses for users. Value proposition Advocates of public and hybrid clouds claim that cloud computing allows companies to avoid or minimize up-front IT infrastructure costs. Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and that it enables IT teams to more rapidly adjust resources to meet fluctuating and unpredictable demand, providing burst computing capability: high computing p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CBS News
CBS News is the news division of the American television and radio service CBS. CBS News television programs include the ''CBS Evening News'', ''CBS Mornings'', news magazine programs '' CBS News Sunday Morning'', '' 60 Minutes'', and '' 48 Hours'', and Sunday morning political affairs program ''Face the Nation''. CBS News Radio produces hourly newscasts for hundreds of radio stations, and also oversees CBS News podcasts like '' The Takeout Podcast''. CBS News also operates a 24-hour digital news network. Up until April 2021, the president and senior executive producer of CBS News was Susan Zirinsky, who assumed the role on March 1, 2019. Zirinsky, the first female president of the network's news division, was announced as the choice to replace David Rhodes on January 6, 2019. The announcement came amid news that Rhodes would step down as president of CBS News "amid falling ratings and the fallout from revelations from an investigation into sexual misconduct allegations" ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 series of instruction sets, the instruction sets found in most personal computers (PCs). Incorporated in Delaware, Intel ranked No. 45 in the 2020 ''Fortune'' 500 list of the largest United States corporations by total revenue for nearly a decade, from 2007 to 2016 fiscal years. Intel supplies microprocessors for computer system manufacturers such as Acer, Lenovo, HP, and Dell. Intel also manufactures motherboard chipsets, network interface controllers and integrated circuits, flash memory, graphics chips, embedded processors and other devices related to communications and computing. Intel (''int''egrated and ''el''ectronics) was founded on July 18, 1968, by semiconductor pioneers Gordon Moore (of Moore's law) and Robert Noyce ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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