omniomni/omni-engineering huggingface dataset:
RE2 (software). RE2 is a software library which implements a regular expression engine. It uses finite-state machines, in contrast to most other regular expression libraries.  RE2 supports a C++ interface.

RE2 was implemented by Google and Google uses RE2 for Google products. RE2 uses an "on-the-fly" deterministic finite-state automaton algorithm based on Ken Thompson's Plan 9 grep.

Comparison to PCRE 
RE2 performs comparably to Perl Compatible Regular Expressions (PCRE). For certain regular expression operators like | (the operator for alternation or logical disjunction) it is superior to PCRE. Unlike PCRE, which supports features such as lookarounds, backreferences and recursion, RE2 is only able to recognize regular languages due to its construction using the Thompson DFA algorithm. It is also slightly slower than PCRE for parenthetic capturing operations.

PCRE can use a large recursive stack with corresponding high memory usage and result in exponential runtime on certain patterns. In contrast, RE2 uses a fixed stack size and guarantees that its runtime increases linearly (not exponentially) with the size of the input. The maximum memory allocated with RE2 is configurable. This can make it more suitable for use in server applications, which require boundaries on memory usage and computational time.

Adoption

Use in Google products 
RE2 is available to users of Google Docs and Google Sheets. Google Sheets supports RE2 except Unicode character class matching.  RegexExtract does not use grouping.

Use in Go
The built-in "regexp" package uses the same patterns and implementation as RE2, though it is written in Go.  This is unsurprising, given Go's common staff from the Plan 9 team.

Related libraries
The RE2 algorithm has been rewritten in Rust as the package "regex". CloudFlare's web application firewall uses this package because the RE2 algorithm is immune to ReDoS.

Russ Cox also wrote RE1, an earlier regular expression based on a bytecode interpreter. OpenResty uses a RE1 fork called "sregex".

See also
 Comparison of regular expression engines

References

Regular expressions
Software using the BSD license
USA-230. USA-230, also known as SBIRS GEO-1, is a United States military satellite and part of the Space-Based Infrared System.

Overview 

In the mid 1950s, the United States began development of the first space-based missile detection system; the Missile Defense Alarm System (MIDAS), in low Earth orbit. Following the end of the MIDAS programme, plans to deploy an operational system led to the Integrated Missile Early Warning Satellite programme (IMEWS), followed by the Defense Support Program (DSP),

The SBIRS satellites are a replacement for the Defense Support Program early warning system. They are intended to detect ballistic missile launches, as well as various other events in the infrared spectrum, including nuclear explosions, aircraft flights, space object entries and reentries, wildfires and spacecraft launches.

Satellite description 
SBIRS-GEO 1 was manufactured by Lockheed Martin Space and is built upon the A2100M satellite bus.

Launch 
SBIRS GEO-1 was launched on 7 May 2011 from Cape Canaveral (CCAFS), atop an Atlas V 401 (AV-022) launch vehicle.

References 

Spacecraft launched in 2011
Reconnaissance satellites of the United States
USA satellites
Early warning satellites
Maurice Nelles. Maurice Nelles (October 19, 1906 - August 30, 1998) was an engineer, business executive and professor.

Early life and education
Nelles was born in Madison, South Dakota. Nelles earned a bachelor's degree in 1927 and a master's degree in 1928, both from the University of South Dakota and earned a Ph.D. from Harvard University in 1934. While at Harvard, he held the Charles A. Coffin Fellowship and the George H. Emerson and Harvard scholarships.

Career
During World War II, Nelles worked at Lockheed Corporation and the War Production Board. While at Lockheed, Nelles and his coworkers Morlan A. Visel and Ernest L. Black proposed a "Pacific Research Foundation" which eventually became SRI International.

After Lockheed, Nelles became a professor of aeronautical engineering at the University of Southern California, where he designed the laboratory ship Velero IV. In 1949 he oversaw Otis Barton's record-breaking 4500 ft deep sea dive off of Santa Cruz Island in a benthoscope that Nelles had designed. He would also teach at Pennsylvania State University and the University of Virginia.

He served as the director of research for Borg Warner, Technicolor, Crane, and Westinghouse. He was later a consultant to the National Academy of Sciences.

Nelles died August 30, 1998, in La Jolla, California.

References

1906 births
University of Southern California faculty
Pennsylvania State University faculty
University of Virginia faculty
Harvard University alumni
University of South Dakota alumni
Lockheed people
People from Madison, South Dakota
1998 deaths
Montevideo Waterworks Company. The Montevideo Waterworks Company, Ltd. was a British company, operating in Montevideo, Uruguay.  Organized in 1879, its offices were at 61 Moorgate, London, England. The company was founded to take over a concession granted by the government of Uruguay for the construction of the necessary works for supplying the city with water derived from the Santa Lucía River. The point on that river at which the water was taken was  from the city, and after being treated with aluminoferric salt, the water was filtered and pumped through a steel main to the service reservoirs, , on a rocky eminence at Las Piedras, at an elevation of about  above the city. The company served nearly 35,000 houses, with the daily consumption averaging  per capita. There were six settling reservoirs, nine sand filters, two reservoirs, and five distributing reservoirs. The total extent of water mains was about . The company assets were sold to the Uruguayan government in 1948.

References

History of Montevideo
Water supply and sanitation in Uruguay
Defunct companies based in London
Renewable resource companies established in 1879
British companies disestablished in 1948
1879 establishments in Uruguay
1948 disestablishments in Uruguay
Renewable resource companies disestablished in 1948
British companies established in 1879
Robert E. Swain. Robert Eckles Swain (January 5, 1875 – May 31, 1961) was an alumnus of and faculty member at Stanford University, a mayor of Palo Alto, California and a founder of SRI International.

Early life
Born on January 5, 1875, in Hollister, California, a town that his father and three associates had founded. After two years of high school, Swain entered Stanford University in its fourth class of undergraduates. His professor Jarius Maxson Stillman, head of Stanford's department of chemistry, convinced him to study chemistry. Swain graduated with his bachelor's degree in 1899.

Swain's first academic job occurred in 1898, prior to his graduation; he was a teaching assistant. In 1899, he was appointed as an instructor at Stanford, but left on a leave of absence to study biochemistry at Yale University under Lafayette Mendel and Russell Henry Chittenden. Swain received a master's degree in 1901. The following year, he worked with Franz Hofmeister at Strassburg and with Albrecht Kossel at
Heidelberg, returning to Stanford as an assistant professor in 1902. After another year of leave, Swain completed a Ph.D. at Yale in 1904.

Career

In 1912, Swain attained the rank of full professor. In 1917, he became the head of Stanford's chemistry department, succeeding the professor that convinced him to pursue chemistry; he would hold that position until his retirement in 1940. From 1929 to 1933, Swain was acting president of Stanford University while Ray Lyman Wilbur was United States Secretary of the Interior for Herbert Hoover.

Swain also participated in local politics, serving on the Palo Alto, California city council from 1912 to 1921, including three terms as mayor from 1914 to 1916.

Swain was a strong proponent of the establishment of a research institute at Stanford University, which would eventually become SRI International.

Legacy

Swain and his first wife, Harriet King (Cuthbertson) Swain had two children: Robert Cuthbertson Swain, himself a prominent chemist, and Dorothy Muriel Swain, who married Ralph Norman Begien Jr.
Professor Swain's second wife was Juanita Elena (Hiestrich) Jaffe Swain.

References

1875 births
1961 deaths
Stanford University alumni
Stanford University Department of Chemistry faculty
Yale University alumni
SRI International people
People from Hollister, California
Mayors of Palo Alto, California
Difluoroacetylene. Difluoroacetylene is a compound of carbon and fluorine having molecular formula C2F2.  A linear molecule, its two carbons are joined by a triple bond and have terminal fluorines:  F-C≡C-F.  The molecule is the perfluorocarbon analog of acetylene, C2H2.  Preparation of difluoroacetylene is difficult, with danger of explosions and with low yields. Nevertheless, the compound has been made, isolated, and characterized by various spectroscopical methods (MS, NMR, Photoelectron- and IR spectroscopy).  The compound is of interest as a precursor to fluoropolymers containing double bonds, analogous to polyacetylene.

Difluoroacetylene is stable in the gaseous phase under low pressure. At liquid nitrogen temperature, it is slowly changing to tetrafluorobutatriene, most likely through an intermediate of difluorovinylidene.

See also 
Higher halogen homologues:
 Dichloroacetylene
 Dibromoacetylene
 Diiodoacetylene

References

Bibliography

Dihaloacetylenes
Fluorocarbons
Abou Elela Mady. Abou Elela Mady () (born 3 April 1958) is an Egyptian engineer and politician. He is the chairman of the Wasat Party and a former member of the Muslim Brotherhood. He was released from detention on 13 August 2015, 2 years after being arrested.

Education and career
Mady was born on 3 April 1958. He graduated from Minya University’s School of Engineering with honors in 1984, and also received a Bachelor of Laws from Cairo University.

Politics
Mady was the president of the students' union at Minya University in 1977, and then became the president of the students' union of all the Egyptian universities in 1978. Mady joined the Muslim Brotherhood in the 1980s, and then left the Muslim Brotherhood with the aim of founding a new political party with a new vision of moderate democratic Islamic reference in 1996.

References

1958 births
Living people
Egyptian engineers
Members of the Egyptian Constituent Assembly of 2012
Minya University alumni
Cairo University alumni
George Henry Challenger. George Henry Challenger (1881–1947) was a British aviator and aero-engineer, originally with the Bristol Aeroplane Company and later with Vickers. He designed a number of aircraft and held a number of aviation-related patents.

Early life
Challenger was born on 3 June 1881 at Neath in Glamorganshire, Wales. He was originally employed as an engineer at the Bristol Tramways and Carriage Company where his father was chief engineer.

Bristol
With the formation of the British and Colonial Aeroplane Company in 1910 which started with leased premises from the Bristol Tramways and Carriage Company, Challenger moved across to the new aeroplane company as works manager and engineer. With the creation in 1911 of an experimental department, Challenger was sent to Larkhill to learn to fly and on 14 February 1911 he obtained his Royal Aero Club Aviators Certificate (No. 58). Among his designs at Bristol were the Bristol Boxkite and Bristol Glider. He left Bristol to work for the aviation department of Vickers where he was chief designer and engineer.

Vickers
With the formation of an aeronautical division by Vickers Challenger left Bristol to work for the new company.  Challenger was involved in numerous patents, including those for a ring mounting and a gun synchroniser, both for machine guns.
He left Vickers in 1918

References

Notes

Bibliography

1881 births
Welsh aviators
British aerospace engineers
1947 deaths
Vickers E.F.B.1. The Vickers E.F.B.1 'Destroyer' was an early British military aircraft prototype. Although not itself a success, the design was considered worth developing, and a series of similar aircraft were produced in prototype form, eventually leading to the Vickers F.B.5 "Gunbus", which saw widespread service during World War I.

Design

The Experimental Fighting Biplane No. 1 (E.F.B.1) was designed in response to a British Admiralty requirement for an aircraft intended for an offensive role. As such, it was notable for being the first British aircraft to be specifically designed for a military role. A contract for an experimental prototype was given to Vickers on 19 November 1912.

The resulting aircraft was an unequal-span staggered wing, two-bay pusher biplane with the tailplane mounted on booms behind the wings and the crew of two housed in a nacelle above the lower wing, with the engine behind them. The pusher layout was chosen to meet the requirement for a forward-firing gun, since gun synchronisation mechanisms had not been developed at the time. Extensive use of metal was made in its structure, the tail booms and wing spars being made of steel and the nacelle of steel tube with a covering of sheet duralumin.

Lateral control was effected by wing warping, and in order to prevent fatiguing of the structure caused by warping loads the rear wing spar was built in three sections, the outer sections being hinged to the centre section, and the wing ribs were loosely threaded onto the spars.

The armament consisted of a single belt-fed 0.303 Vickers-Maxim machine gun mounted at the front of the nacelle on a flexible mounting.

It was exhibited at the Aero show at Olympia in February 1913, but crashed soon afterwards, possibly on its first flight. Nevertheless, the design was considered promising enough for work to be started on another aircraft of similar design, the Vickers E.F.B.2, and this line of development would eventually lead to the Vickers F.B.5 Gunbus.

Specifications

Comparable aircraft
Royal Aircraft Factory F.E.3
Grahame-White Type VI

Notes

References

 Mason F.K. The British Fighter Since 1912  London: Putnam, 1992. 

Single-engined pusher aircraft
1910s British fighter aircraft
1910s British experimental aircraft
E.F.B.1
Aircraft first flown in 1913
Aircraft with fixed conventional landing gear
Biplanes
Journal of Applied Crystallography. The Journal of Applied Crystallography is a peer-reviewed scientific journal published by Wiley-Blackwell on behalf of the International Union of Crystallography. It was established in 1968 with André Guinier as the founding editor. The journal covers the application of crystallography and crystallographic techniques. William Parrish (1914–1991) chaired the committee that started the journal.

The Journal of Applied Crystallography publishes articles on the crystallographic methods that are used to study crystalline and non-crystalline matter with neutrons, X-rays and electrons, their application in condensed matter research, materials science and the life sciences, and their use in identifying phase transformations and structural changes of defects, structure-property relationships, interfaces and surfaces etc. The journal also covers developments in crystallographic instrumentation and  apparatus, theory and interpretation and numerical analysis and other related subjects, together with information on crystallographic computer programs.

Abstracting and indexing
The journal is abstracted and indexed in:

References

External links 
 

Chemistry journals
Wiley-Blackwell academic journals
Bimonthly journals
Multilingual journals
Academic journals established in 1968
M-Cubed. M-Cubed is a miniaturized satellite built by students at the University of Michigan in a joint project run by the Michigan Exploration Laboratory (MXL) and Jet Propulsion Laboratory (JPL). It is an example of the popular CubeSat design for amateur satellites. It was launched from Vandenberg Air Force Base on 28 October 2011 atop a Delta II rocket. M-Cubed was launched as a secondary payload to the Suomi NPP satellite, along with AubieSat-1, DICE-1, DICE-2, Explorer-1 Prime and RAX-2.

M-Cubed, short for Michigan Multipurpose Minisat, was designed as a technology demonstrator for a new FPGA-based image processing system intended for a future NASA mission, Plankton, Aerosol, Cloud, ocean Ecosystem (PACE), recommended by the Earth Science Decadal Survey. The mission was also intended to validate the satellite bus design for use in future CubeSat missions. The satellite uses a passive magnetorquer for attitude control, consisting of a large permanent magnet that aligns the satellite with the Earth's magnetic field. On-board control is provided by a Taskit Stamp9G20 microcontroller running Real time Linux.

Following the launch, MXL was unable to command M-Cubed and observed anomalies in its transmitted data. MXL concluded that the M-Cubed CubeSat became magnetically conjoined to Explorer-1 [Prime], a second CubeSat released at the same time, via both satellites' attitude control magnets. This is the first recorded instance of two satellites unintentionally and non-destructively latching together. As a result of this incident, M-Cubed was unable to complete its mission.

The M-Cubed mission was successfully re-flown as MCubed-2, launched on 6 December 2013.

See also 

 Explorer-1 [Prime]

References

External links 
 
 AMSAT - Satellite Detail - MCubed

CubeSats
Spacecraft launched in 2011
University of Michigan
AubieSat-1. AubieSat-1 (OSCAR-71) is a CubeSat designed, built, and tested by undergraduate students at Auburn University. It was launched from Vandenberg Air Force Base October 28, 2011 atop a Delta II rocket. This was a multi-payload mission with five other CubeSats, M-Cubed, DICE-1, DICE-2, Explorer-1_Prime and RAX-2.

Purpose
The purpose of AubieSat-1 was to accomplish several things:
 Establish Auburn University as a university capable of developing satellites.
 Provide workforce applicable experience for students.
 Study and compare the effects of solar cell coatings.
 Demonstrate a system bus that could be used at the baseline design for additional satellites later developed by the program.

References

External links

 AubieSat-1 Website

CubeSats
Spacecraft launched in 2011
John F. Carney. John F. Carney III (1941-April 24, 2019) was chancellor of Missouri University of Science and Technology from 2005 to 2011.

Carney received his bachelor's degree in civil engineering from Merrimack College in 1963 and a master's in 1964.  He received a Ph.D. civil engineering from Northwestern University in 1966.  He taught at the University of Connecticut from 1966 to 1981 when he became head of the civil engineering department at Auburn University.  He moved to Vanderbilt University in 1983 and was associate dean for graduate affairs (1989–1993) and then associate dean for research and graduate affairs (1993–1996). He was provost and vice president for academic affairs at Worcester Polytechnic Institute from 1996 to 2004 when he assumed the Missouri job.

His research specialty was impact mechanics particularly with railroads and he holds 10 patents.

Carney in 2007 was successful in persuading the University of Missouri Board of Curators unanimously to change the name of the University of Missouri-Rolla (in the same manner as other schools in the University of Missouri System) to Missouri University of Science and Technology. Carney had argued that the old name was not representative of the school's mission as an engineering school.

References

1941 births
Merrimack College alumni
Robert R. McCormick School of Engineering and Applied Science alumni
University of Connecticut faculty
Vanderbilt University faculty
Worcester Polytechnic Institute faculty
Missouri University of Science and Technology faculty
Living people
Place of birth missing (living people)
Steel Reborn. Steel Reborn is a public art work by American artist Charles Toman, located in front of the Miller Compressing Company on the south side of Milwaukee, Wisconsin. The abstract artwork is a three-ton welded steel ball placed atop a 35-foot base. It is located at 1640 W Bruce St. 

The work was commissioned by Miller Compressing to demonstrate the value of recycling. The artist selected the materials and fabricated the piece on site, which was originally on Jones Island. It was moved to its current location on W Bruce St at a later date.

References

Outdoor sculptures in Milwaukee
1965 sculptures
Steel sculptures in Wisconsin
Tamil Nadu Common Entrance Test. The Tamil Nadu Common Entrance Test is an eligibility examination for studying post graduate courses like M.E., M.Tech., M.Arch., M.Plan., M.B.A. and M.C.A. in colleges of Tamil Nadu, India. This examination is conducted by Anna University, Chennai, on behalf of the Government of Tamil Nadu.

Eligibility for TANCET 
Academic Criteria
Candidates who have completed or are in their final year of Graduation from a recognized university can apply. Masters in any discipline of science is also accepted.
Candidates who have passed 10+2 or possess a 10+3 years diploma certificate from the State Board of Technical Education are eligible. 
Candidates with a valid GATE score with qualifying marks in relevant discipline of Engineering /Technology, need not appear for TANCET.
Candidates who have a valid GATE score with qualifying marks in Engineering Science (XE) and Life Science (XL), have to appear for TANCET 2020.
For MBA: Candidates must possess a Bachelor’s degree with a minimum duration of 3 years with at least a 50% aggregate score (45% in case of reserved category candidates). 
For MCA: Candidates must possess a 3 year Bachelor’s degree in Mathematics from any recognized university or must have studied mathematics in 11th or 12th grade. 
For M.E. / M.Tech / M.Arch / M.Plan: Candidates should have passed a Bachelor’s degree exam in the relevant field by obtaining at least 50% marks (45% in case of reserved category candidates). Those who have a B.E / B.Tech / B.Arch Degree or B.Pharm Degree or Master’s Degree in the relevant branch of Science / Arts or 10 + 2 + AMIE or 10 + 3 years diploma (awarded by the State Board of Technical Education) + AMIE can also apply. 
Candidates in the final year of their graduation are also eligible. 
Candidates with B.E. / B.Tech degrees obtained through distance mode/weekend courses are not eligible. 
Sponsored candidates are only offered admission in University Departments of Anna University, Chennai i.e. CEG, ACT, SAP, and MIT campuses.

References

External links
 TANCET Counselling 2021
TANCET Result 2015

Education in Tamil Nadu
Standardised tests in India
Year of establishment missing