omniomni/omni-engineering huggingface dataset:
Umesh Vazirani. Umesh Virkumar Vazirani is an Indian–American academic who is the Roger A. Strauch Professor of Electrical Engineering and Computer Science at the University of California, Berkeley, and the director of the Berkeley Quantum Computation Center. His research interests lie primarily in quantum computing. He is also a co-author of a textbook on algorithms.

Biography
Vazirani received a BS from MIT in 1981 and received his Ph.D. in 1986 from UC Berkeley under the supervision of Manuel Blum.

He is the brother of University of California, Irvine professor Vijay Vazirani.

Research
Vazirani is one of the founders of the field of quantum computing. His 1993 paper with his student Ethan Bernstein on quantum complexity theory defined a model of quantum Turing machines which was amenable to complexity based analysis. This paper also gave an algorithm for the quantum Fourier transform, which was then used by Peter Shor within a year in his celebrated quantum algorithm for factoring integers.

With Charles Bennett, Ethan Bernstein, and Gilles Brassard, he showed that quantum computers cannot solve black-box search problems faster than  in the number of elements to be searched. This result shows that the Grover search algorithm is optimal. It also shows that quantum computers cannot solve NP-complete problems in polynomial time using only the certifier.

Awards and honors
In 2005, both Vazirani and his brother Vijay Vazirani were inducted as Fellows of the Association for Computing Machinery, Umesh for "contributions to theoretical computer science and quantum computation" and Vijay for his work on approximation algorithms. Vazirani was awarded the Fulkerson Prize for 2012 for his work on improving the approximation ratio for graph separators and related problems (jointly with Satish Rao and Sanjeev Arora). In 2018, he was elected to the National Academy of Sciences.

Selected publications
. A preliminary version of this paper was also published in STOC '87.
.
.
.

References

External links
Umesh Vazirani at UC Berkeley

Year of birth missing (living people)
Living people
Indian emigrants to the United States
2005 fellows of the Association for Computing Machinery
Theoretical computer scientists
20th-century Indian mathematicians
21st-century Indian mathematicians
20th-century American mathematicians
21st-century American mathematicians
University of California, Berkeley alumni
UC Berkeley College of Engineering faculty
American people of Sindhi descent
Indian Sindhi people
American academics of Indian descent
Quantum information scientists
American textbook writers
Indian computer scientists
Serrurier truss. A Serrurier truss is used in telescope tube assembly construction. The design was created in 1935 by engineer Mark U. Serrurier when he was working on the Mount Palomar  Hale Telescope.  The design solves the problem of truss flexing by supporting the primary objective mirror and the secondary mirror by two sets of opposing trusses before and after the declination pivot. The trusses are designed to have an equal amount of flexure, which allows the optics to stay on a common optical axis. When flexing, the "top" truss resists tension and the "bottom" truss resists compression. This has the effect of keeping the optical elements parallel to each other. The net result is all of the optical elements stay in collimation regardless of the orientation of the telescope.

Some Serrurier truss designs  end the truss members with a short flexible rod creating a more ideal "parallel motion flexure" system, to allow maximum parallelism of optical elements under gravitational load. Since truss members work primarily in tension and compression, there is no appreciable loss of stiffness due to the bending of the end flexures.

Certain designs used by amateur telescope makers, specifically truss tube Dobsonians that use a single truss, are sometimes called "Serrurier truss" designs. These single truss designs are used for their rigidity and do perform the function of keeping the optical elements parallel, but since they lack the opposing truss that keeps optics on the same optical axis they are not technically "Serrurier trusses".

Other examples of Serrurier truss designs:

See also
 List of telescope parts and construction

Footnotes

References
Learner, Richard. "The Legacy of the 200-inch", Sky&Telescope, April 1986, pp. 349–353
Diffrient, Roy. "Flexure of a Serrurier Truss", Sky&Telescope, February 1994, pp. 91–94
astro.caltech.edu - Reflecting Telescopes

Optical telescope components
Articles containing video clips

ja:トラス#セルリエトラス
Skorpion Zinc. Skorpion Zinc is a zinc mine in the ǁKaras Region of southern Namibia, producing Special High Grade (SHG) zinc. The mine is situated near Rosh Pinah. It was established at a cost of US$450 million by Anglo American in 2003. It is the tenth-largest zinc mine in the world, and the largest employer in Rosh Pinah, providing 1,900 jobs.

Skorpion is a unique mine in several ways. Firstly, it is a supergene zinc ore body composed of alluvial accumulations of zinc carbonate and silicate minerals of detrital nature deposited within a palaeochannel. There are no other currently commercially viable deposits of this type. It is also one of the few mines in the world that currently mines zinc oxides, a mixture of non-sulphidic zinc minerals such as smithsonite, hydrozincite, tarbuttite and willemite. Finally, it is the only zinc processing facility to use solvent extraction-electrowinning metallurgy to process and refine its zinc products (others using conventional smelting and roasting).

The Skorpion SX-EW plant creates Special High Grade, ultra-pure zinc cathode as a primary product, which is so low in impurities that it commands a price premium.

In November 2010 the project was acquired by Vedanta Resources at a cost of US$707 million. In 2019, Vedanta announced mining would be suspended for a four months due to technical problems. Then in 2020 Vedanta placed the mine on care and maintenance due to pit failures.

See also
 Rosh Pinah mine
 2008 Skorpion Zinc strike

References

Sources

See also 
 Mining in Namibia

Surface mines in Namibia
Lead and zinc mines in Namibia
Economic geology
2003 establishments in Namibia
Buildings and structures in ǁKaras Region
Vedanta Resources
Terry Welch. Terry Archer Welch (January 20, 1939 – November 22, 1988) was an American computer scientist. Along with Abraham Lempel and Jacob Ziv, he developed the lossless Lempel–Ziv–Welch (LZW) compression algorithm, which was published in 1984.

Education
Welch received a B.S., M.S. and Ph.D. degree at MIT in electrical engineering. He taught at the University of Texas at Austin and worked in computer design at Honeywell in Waltham, Massachusetts.

Career
He taught at the University of Texas in Austin until joining the Sperry Research Center, Sudbury, Massachusetts, in 1976 where the paper about the LZW algorithm was published. In 1983 he joined DEC where he worked as DEC liaison to MCC's advanced computer architecture program.

He died of a brain tumor in 1988.

References 

American information theorists
Modern cryptographers
1939 births
1988 deaths
Massachusetts Institute of Technology alumni
Wright Flying School. The Wright Flying School, also known as the Wright School of Aviation, was operated by the Wright Company from 1910 to 1916 and trained 119 individuals to fly Wright airplanes.

History
Orville Wright began training students on March 19, 1910, in Montgomery, Alabama, at a site that later became Maxwell Air Force Base. With the onset of milder weather that May, the school relocated to Huffman Prairie Flying Field near Dayton, Ohio, where the Wrights developed practical aviation in 1904 and 1905 and where the Wright Company tested its airplanes. The school also had a facility in Augusta, Georgia run by Frank Coffyn.

Some of the earliest graduates became members of the Wright Exhibition Team.

Sites

 Maxwell Air Force Base in Montgomery, Alabama
 Huffman Prairie Flying Field near Dayton, Ohio
 Augusta, Georgia

Notable students

 1st Lt. Henry H. Arnold (1886–1950) 
 1st Lt. Thomas DeWitt Milling (1887–1960)
 Calbraith Perry Rodgers (1879–1912) started on June 5, 1911. Within a week, his instructor was letting him take off, fly, and land the airplane, but when he asked to be allowed a solo flight, the instructor said "no". Rodgers then bought the training airplane, a Wright Flyer Model B, the first to be privately owned.
 Oscar Brindley (1885–1918)
 Walter Richard Brookins (1889–1953)
 Howard W. Gill (1882–1912)
 Oliver LeBoutillier (1894–1983)
 Philip Orin Parmelee (1887–1912)
 Leda Richberg-Hornsby (1886–1939)
 Marjorie Stinson (1895–1975)  
 Edward Stinson (1893–1932)
 J. Clifford Turpin (1886–1966)
 Arthur L. "Al" Welsh (1881–1912) learned to fly and then in the summer of 1910 became an instructor at the Wright Flying School.
 George William Beatty (1887–1955) was taught by Al Welsh, taking his first lesson on June 24, 1911, and soloing on July 23, 1911. That same day, he flew as a passenger with Welsh to establish a new American two-man flight altitude record of ; and on August 5, 1911, Beatty broke his own record, flying to  with Percy Reynolds as his passenger.

See also

 List of schools in the United States

References

External links
 Pioneer Flyers Who Trained at Wright Brothers Field .

1910 establishments in Alabama
1916 disestablishments in the United States
Aviation history of the United States
Aviation schools in the United States
Education in Augusta, Georgia
Educational institutions disestablished in 1916
Educational institutions established in 1910
Schools in Montgomery, Alabama
Schools in Ohio
Wright brothers
Mary Ann Liebert. Mary Ann Liebert, Inc. is a privately held independent publishing company founded by its president, Mary Ann Liebert, in 1980. The company publishes peer-reviewed academic journals, books, and trade magazines in the areas of biotechnology, biomedical sciences, medical research, and life sciences; clinical medicine, surgery, and nursing; technology and engineering; environmental science; public health and policy; law, regulation, and education.

The company's headquarters is in New Rochelle, New York.

The company has been described as the first to establish a specialty in genetic engineering.

Publications

Eschewing traditional market research, the publisher seeks out niche topics overlooked by larger publishers. Its portfolio of more than ninety peer-reviewed journals includes:

Publications focused on topics outside of the medical field include Westchester Wag, which covers the social scene in Westchester County, New York, and Rinkmagazine, a skating periodical.

History 

The company's first publication was the Journal of Interferon Research, launched in 1981. Genetic Engineering News was launched the same year, attaining a circulation of 50,000 by 2000. The combined circulation of all titles from the publisher in 2000 was 250,000.

The company's top five publications by revenue as of 2000 were Genetic Engineering News (50,000), Westchester Wag (50,000), Journal of Women's Health and Gender-Based Medicine (5,000), Human Gene Therapy (2,300), and AIDS Research and Human Retrovirus (2,150).

In February 2018, the company launched The CRISPR Journal, a bimonthly journal devoted to research advances and commentary in the field of CRISPR and genome editing.

See also 

:Category:Mary Ann Liebert academic journals

References

External links
 

Academic publishing companies
Publishing companies of the United States
Companies based in New Rochelle, New York
American publishers (people)
Publishing companies established in 1980
1980 establishments in New York (state)
Iometer. Iometer is an I/O subsystem measurement and characterization tool for single and clustered systems. It is used as a benchmark and troubleshooting tool and is easily configured to replicate the behaviour of many popular applications. One commonly quoted measurement provided by the tool is IOPS.

History
Created by Intel Corporation (Sean Hefty, David Levine and Fab Tillier are listed by the Iometer About dialog as the developers), the tool was officially announced at the Intel Developer Forum (IDF) on 17 February 1998. In 2001 Intel discontinued development and subsequently handed the sources to the Open Source Development Lab for release under the Intel Open Source License. On 15 November 2001 the Iometer project was registered at SourceForge.net and an initial version was made available. Experiencing no further development, the project was relaunched by Daniel Scheibli in February 2003. Since then it has been driven by an international group of individuals who have been improving and porting the product to additional platforms.

Functionality

Iometer is based on a client–server model, where one instance of the Iometer graphical user interface is managing one or more 'managers' (each one representing a separate Dynamo.exe process) which are doing the I/O with one or more worker threads. Iometer performs Asynchronous I/O - accessing files or block devices (later one allowing to bypass the file system buffers).

Iometer allows the configuration of disk parameters such as the 'Maximum Disk Size', 'Starting Disk Sector' and '# of Outstanding I/Os'. This allows a user to configure a test file upon which the 'Access Specifications' configure the I/O types to the file.
Configurable items within the Access Specifications are:
 Transfer Request Size
 Percent Random/Sequential distribution.
 Percent Read/Write Distribution
 Aligned I/O's.
 Reply Size
 TCP/IP status
 Burstiness.
In conjunction with the Access Specifications, Iometer allows the specifications to be cycled with incrementing outstanding I/O's, either exponentially or linearly. The tool outputs 50 parameters into a .CSV file, allowing multiple applications to analyse and generate graphs and reports on the measured performance.

See also
DiskSpd

References

External links
 Iometer Project homepage
 Iometer Project on SourceForge.net

Input/output
Benchmarks (computing)
Maserati Barchetta. The Maserati Barchetta is a mid-engine racing car, like the 350 and 450S, that was designed by Carlo Gaino of the Synthesis Design, an Italian design house.

The Barchetta was designed and developed for the one-make racing series Grantrofeo Barchetta which was held 1992 and 1993 throughout Italy and Europe. It featured sixteen races in total, most of them in Italy. The Barchetta had a backbone chassis made of aluminium which was unusual for a Maserati automobile for a time considering that the cars offered by Maserati had a steel unibody construction. It had a Formula 1 suspension geometry and body panels made of carbon fibre which resulted in a total weight of . The Barchetta was one of the last Maserati models built under De Tomaso ownership.

16 examples of the racing model were produced by hand at the De Tomaso factory in Modena, plus two prototypes (one racing-corsa, one street-stradale model). It featured a mid-mounted Maserati AM501 V6 engine displacing 1,996 cc and was shared with the local 2.0 L engine offered in the Italian market on the Biturbo and the Ghibli. The engine had a peak power output of  at 7,250 rpm. The engine was mated to a 6-speed manual transmission manufactured by ZF Friedrichshafen and having straight cut gears. These modifications allowed the car to attain a top speed of . Having a true open top design, driver protection was provided only by a small air deflector.

The central-frame concept was carried over in the De Tomaso Guarà, but the frame was around  longer because it was fitted with a larger V8 engine.

This was thought as a way to inject much needed excitement and enthusiasm for Maserati that saw its reputation badly ruined by years of exciting but maintenance sensitive products, eventually culminating in Maserati's withdrawal from the North American market at this time.

References

External links
 Official Maserati Barchetta page 
Synthesis Design/ Carlo Gaino designer of Maserati Barchetta
 Maserati Barchetta report QV500
  AM 501 Engine
 Maserati Barchetta
 Maserati Barchetta Stradale - Road version
 The Maserati Grantrofeo Barchetta Register at www.maserati-alfieri.co.uk

Barchetta
Sports racing cars
Automobiles with backbone chassis
MKS. MKS may refer to:

 MKS (Switzerland), a broker of precious metals
 MKS Inc., a software vendor (formerly Mortice Kern Systems)
 MKS Instruments, an American process control instrumentation company
 MKS system of units of measurement based on the metre, kilogram, and second
M. K. Stalin, an Indian politician and current Chief Minister of Tamil Nadu
 Lincoln MKS, an automobile produced by the Lincoln division of Ford Motor Company
 Marks & Spencer, stock symbol MKS
 McKusick–Kaufman syndrome, a rare human genetic condition
 Moscow Korean School, a Korean international school in Moscow, Russia
 Mutya Keisha Siobhan, an English girl group
 Międzyzakładowy Komitet Strajkowy or Inter-Enterprise Strike Committee, formed in Gdańsk Shipyard, Poland in 1980
 .mks, a file extension for the Matroska open standard free container format
Listen. Listen may refer to:
 The action of listening
 Central auditory system listening is how the brain processes what you hear
 Listening behaviour types in human communication

Computing
 LISTEN, a TCP connection state on the server side indicating a port waiting for new client connections
 Listen server, a type of game server
 listen(), a function provided by the Berkeley sockets API
 Project LISTEN, developing reading-tutorial software using speech recognition

Music

Albums
 Listen (C21 album), 2004
 Listen (Christy Moore album), 2009
 Listen (Cindy Morgan album), 1996
 Listen (David Guetta album), 2014
 Listen (Doug Raney album), 1981
 Listen (Emanuel and the Fear album), 2010
 Listen (A Flock of Seagulls album), 1983
 Listen (Jordan Rudess album), 1993
 Listen (The Kooks album), 2014
 Listen (Paul Rogers album), 2002
 Listen (Tim Bowman Jr. album), 2016
 Listen (TQ album), 2004
 Listen (EP), by Stonefree, 2004
 Listen: The Very Best Of, by Herbs, 2002
 Listen: The Very Best of Jenny Morris, 2004
 Listennn... the Album, by DJ Khaled, 2006
 Listen, by Bondy Chiu
 Listen, by The Chordettes
 Listen, by Michelle Tumes
Listen!, by Barbee Boys

Songs
 "Listen" (Beyoncé song), 2007
 "Listen" (Collective Soul song), 1997
 "Listen" (David Guetta song), 2014
 "Listen!!!", by Talib Kweli
 "Listen", by Bic Runga from Birds
 "Listen", by Chad Brownlee from Love Me or Leave Me
 "Listen", by Chicago from The Chicago Transit Authority
 "Listen", by The Clash from Capital Radio One
 "Listen", by Haley Reinhart from Better
 "Listen", by Julian Lennon from Help Yourself
 "Listen", by Tears For Fears from Songs from the Big Chair
 "Listen", by Toad The Wet Sprocket from Dulcinea

Other uses
 Listen (2012 film), a 2012 film
 Listen (2020 film), a 2020 film
Listen, a 2015 film featuring Micah Hauptman
 "Listen" (Doctor Who), a 2014 episode of Doctor Who
 Listen, a brand name of estradiol enanthate/algestone acetophenide, a form of birth control
 Listen (horse) (foaled 2005), Irish racehorse

See also
 Listener (disambiguation)
 Listening (disambiguation)
Oracle BPEL Process Manager. Oracle BPEL Process Manager is a BPEL engine that is a member of the Oracle Fusion Middleware family of products.  It enables enterprises to orchestrate disparate applications and Web services into business processes. The ability to quickly build and deploy these processes in a standards-based manner delivers critical functionality for developing a Service-Oriented Architecture (SOA).

Oracle BPEL engine was acquired from Collaxa, formally called Collaxa BPEL Server, in April 2004. Now it is a part of the Oracle SOA Suite.

See also
 Comparison of business integration software

References

External links
 

BPEL Process Manager
Mirka-class frigate. The Mirka class was the NATO reporting name for a class of light frigates built for the Soviet Navy in the mid to late 1960s. The Soviet designation was Storozhevoi Korabl (escort ship) Project 35 (Mirka I) and Project 35M (Mirka II).

Design
The role of these ships was anti-submarine warfare in shallow waters and they were similar to the s but had a modified machinery suite. The machinery consisted of two shafts with diesels and gas turbines (CODAG). The propellers were in tunnels (similar to water jets). The machinery proved noisy and not very reliable.

Ships
A total of 18 ships were built by Yantar shipyard, Kaliningrad, for the Soviet Navy. All ships were decommissioned between 1989 and 1992.

Gallery

See also
 List of ships of the Soviet Navy
 List of ships of Russia by project number

References

 Conway's All the World's Fighting Ships 1947-1995

External links

 Page from FAS 
 Page in Russian
  Russian Mirka Class - Complete Ship List

Frigate classes
Frigates of the Soviet Navy
Ahoy!. Ahoy! was a computer magazine published between January 1984 and January 1989 in the US, covering on all Commodore color computers, primarily Commodore 64 and Amiga.

History
The first issue of Ahoy! was published in January 1984. The magazine was published monthly by Ion International and was headquartered in New York City. It published many games in BASIC and machine language, occasionally also printing assembly language source code. Ahoy! published a checksum program called Flankspeed for entering machine language listings.

Ahoy!'s AmigaUser was a related but separate publication dedicated to the Amiga. It was spun off from a series of columns in Ahoy! with the same title, and the first two issues were published instead of the parent magazine in May and August 1988.

References

External links

Gallery of covers and downloadable archive of disks

Monthly magazines published in the United States
Commodore 8-bit computer magazines
Defunct computer magazines published in the United States
Magazines established in 1984
Magazines disestablished in 1989
Defunct magazines published in New York City
1984 establishments in New York City
1989 disestablishments in New York (state)