omniomni/omni-engineering huggingface dataset:
Brent W. Webb. Brent Woodruff Webb (born August 26, 1956) is a professor of mechanical engineering at Brigham Young University (BYU). From 2011 to 2017, he served as BYU's Academic Vice President.

Webb earned bachelor's and master's degrees from BYU in mechanical engineering and a Ph.D. from Purdue University in the same field.  While at Purdue, he was designated the National Science Foundation Presidential Young Investigator.

Biography 
Webb specializes in heat transfer and other thermodynamics topics.  Software he developed to model complex heat transfer in glass has been used in industrial production in the United States and Japan.

From 1996 to 1999, Webb served as the executive director of BYU's Office of Research and Creative Activities.

On February 1, 2011, Webb was named BYU's Academic Vice President, replacing John S. Tanner.  He had previously served as an associate academic vice president and was succeeded by Alan Harker. He served in this position until June 2017, when he was replaced by James R. Rasband.

Webb is a member of the Church of Jesus Christ of Latter-day Saints (LDS Church). Among other positions in the LDS Church, Webb served as president of a church stake in Orem. He is married to Amy Jo Barker. They have six children.

Publications
"Development of an advanced one-dimensional stem heating model for application in surface fires" in Canadian Journal of Forest Studies with Joshua L. Jones (lead author), Dan Jimenez, James Reardon and Bret Butler.
"SLW modeling of radiative transfer in multicomponent gas mixtures" in Journal of Quantitiative Spectroscopy and Radiative Transfer vol. 65 (2000) Issue 4. with Vladimir P. Solovjov.
"An Efficient Method for Modeling Radiative Transfer in Multicomponent Gas Mixtures With Soot" in Journal of Heat Transfer Vol. 123, Issue 3 (June 2001) with Solovjov.

References

ACERC bio page for Webb
BYU Magazine, Spring 2011, p. 15.
BYU news release on Webb's appointment
Begellhouse listing of articles by Webb
Business Week bio of Webb
Webb's BYU bioChurch News, Aug. 28, 2005
"LDS Scene", Ensign'' September 1986
Mormon Literature database entry for Webb

1956 births
Living people
American leaders of the Church of Jesus Christ of Latter-day Saints
Brigham Young University alumni
Purdue University College of Engineering alumni
American mechanical engineers
Brigham Young University faculty
Latter Day Saints from Indiana
Latter Day Saints from Utah
Johnson RHJ-6 Adastra. The Johnson RHJ-6 Adastra (English: Star) was an American mid-wing, two-seat glider that was designed and constructed by Dick Johnson and first flown on 3 April 1960.

Design and development
The Adastra was conceived by Johnson as a two-place competition aircraft. He completed and flew it in 1960.

The aircraft was of mixed construction. The fuselage was built from wood and was a monocoque design. The wing had a wooden structure, with fiberglass leading edge. The tail surfaces were constructed of wood. The wings aft of the leading edge, the tail surfaces and all control surfaces were covered with doped aircraft fabric.

Originally the aircraft employed an Eppler 150 airfoil section, but Johnson later modified it by adding a 10% wing chord extension, turning the airfoil into an Eppler 151. Later new wings were built with an Eppler 414 airfoil to improve low-speed performance. The new wings used a foam-filled fiberglass leading edge. The tail was originally a "Y" tail, but this was later replaced with a conventional tail, with a low-mounted tailplane.

The individual cockpits were covered with independent bubble canopies, although the aircraft was most often flown solo, with a flat hatch replacing the rear canopy to reduce aerodynamic drag. In 1983 it was reported that a single canopy was being designed for the aircraft.

Only one Adastra was built.

Operational history
In its original configuration Johnson flew the Adastra in the 1960 World Gliding Championships in Cologne, West Germany and finished in 15th place. After extending the wing chord and altering the airfoil he flew it in the US Nationals to a seventh-place finish in 1961 and second place in 1962.

The aircraft was later owned by Jesse Womack of Graham, Texas. The Federal Aviation Administration registry records indicate that the aircraft was destroyed and was removed from the registry on 6 April 1992. The National Soaring Museum lists the aircraft as being part of their collection and in storage.

Aircraft on display
National Soaring Museum - listed as "in storage"

Specifications (Adastra - later configuration)

See also

References

1960s United States sailplanes
Homebuilt aircraft
Aircraft first flown in 1960
Mid-wing aircraft
Aichi Ha-70. The Aichi Ha-70 was a compound engine composed of two 1,700 hp 12-cylinder liquid-cooled inverted V-12 Aichi Atsuta aircraft engines mounted to a common gearbox. The only aircraft powered by the Ha-70 was the Yokosuka R2Y, an Imperial Japanese Navy Air Service (IJNAS) prototype reconnaissance aircraft that was designed and built near the end of World War II.

Design and development
In common with Daimler-Benz, Aichi Kokuki KK joined two Aichi Atsuta engines to drive a single propeller through a combining gearbox in very similar fashion to the Daimler Benz DB 606 (two Daimler-Benz DB 601 engines coupled to a gearbox),

The Yokosuka R2Y prototype reconnaissance aircraft required a new engine of  and after studying the Daimler-Benz DB 606A-2 engine that powered the Heinkel He 119 single-engine reconnaissance bomber, Aichi determined that the required horsepower could be attained by coupling two Atsuta engines with a common gearbox. To obtain the required power the Atsuta would require up-rating by at least  horsepower; Aichi continued to improve the Atsuta 32, eventually extracting the required 

The two inverted Vee Atsuta engines were mounted side-by-side, each rotated outboard from the centre-line so that the inner banks were upright, with sufficient room between them for the exhaust manifolds. The engines were attached to a gearbox that combined the two separate engine drives into a single output shaft.

Application
Fitted to the R2Y the Ha-70 was mounted behind the pilot, requiring a long drive shaft to drive the nose-mounted gear box that mounted the six-bladed propeller.

Specifications

See also

References

Notes

Bibliography
Monogram Close-Up 13 
R. J. Francillon, Japanese Aircraft of the Pacific War (1970 Putnam & Company) SBN 370 00033 1

External links
 Wilkinson, Stephan (Jan 2003) 'With the Noise of a Stone Crusher', Popular Science
 NASM 'Aichi M6A1'

1940s aircraft piston engines
Method of Four Russians. In computer science, the Method of Four Russians is a technique for speeding up algorithms involving Boolean matrices, or more generally algorithms involving matrices in which each cell may take on only a bounded number of possible values.

Idea 

The main idea of the method is to partition the matrix into small square blocks of size  for some parameter , and to use a lookup table to perform the algorithm quickly within each block. The index into the lookup table encodes the values of the matrix cells on the upper left of the block boundary prior to some operation of the algorithm, and the result of the lookup table encodes the values of the boundary cells on the lower right of the block after the operation. Thus, the overall algorithm may be performed by operating on only  blocks instead of on  matrix cells, where  is the side length of the matrix. In order to keep the size of the lookup tables (and the time needed to initialize them) sufficiently small,  is typically chosen to be .

Applications 

Algorithms to which the Method of Four Russians may be applied include:
 computing the transitive closure of a graph, 
 Boolean matrix multiplication, 
 edit distance calculation,
 sequence alignment,
 index calculation for binary jumbled pattern matching.
In each of these cases it speeds up the algorithm by one or two logarithmic factors.

The Method of Four Russians matrix inversion algorithm published by Bard is implemented in M4RI library for fast arithmetic with dense matrices over F2. M4RI is used by SageMath and the PolyBoRi library.

History 

The algorithm was introduced by V. L. Arlazarov, E. A. Dinic, M. A. Kronrod, and I. A. Faradžev in 1970. The origin of the name is unknown;  explain:
The second method, often called the "Four Russians'" algorithm, after the cardinality and nationality of its inventors, is somewhat more "practical" than the algorithm in Theorem 6.9.
All four authors worked in Moscow, Russia in the Soviet Union at the time.

Notes

References
. Original title: "Об экономном построении транзитивного замыкания ориентированного графа", published in Доклады Академии Наук СССР 134 (3), 1970.

Numerical linear algebra
Kennedy K-W. The Kennedy K-W is an American high-wing, strut-braced, single-seat glider that was designed by Harold Kennedy of Dodge City, Kansas, with assistance from Floyd Watson. The aircraft is notable for being assembled from certified powered aircraft components and also for having had an in-flight break-up.

Design and development
The K-W glider was assembled from a collection of certified fixed-wing aircraft parts. The aft fuselage was from an Aeronca Chief, with the welded steel tubing structure narrowed from a two seats in side-by-side seating configuration to a single seat width. The vertical fin from the Chief was retained. The tailplane was from a Taylorcraft, reduced in span to  to allow road transportation on a trailer. The single monowheel landing gear, wings and V-struts were taken from an Aeronca K. The wings were modified to add spoilers.

Because of its component parts heritage, the aircraft had a steel tube fuselage and wooden wings, all covered in doped aircraft fabric covering.

A second aircraft was constructed along the same lines by Bob Dart of Mayville, New York and called the Aero-5. This aircraft still existed in May 2011.

Operational history
The K-W prototype was completed and flown in 1957 and accumulated 390 hours, the majority of which had been flown by Kennedy's two teenaged sons.

The K-W was being flown by a 27-year-old private pilot with 56 hours total time and four hours on type, on 10 August 1975 from the Fowler Airport located near Fowler, Kansas. The glider was being launched by aerotow and when the glider attempted to release the tow rope the righthand wing struts separated from the fuselage at the attachment fitting due to an overload failure. The aircraft crashed and the pilot was killed. The US National Transportation Safety Board identified the likely cause factors as that the pilot in command mishandled the flight controls and exceeded the stress limits of the aircraft. The NTSB also cited the pilot's lack of familiarity with the aircraft type. No further aircraft of the type were constructed.

Variants
Kennedy K-W
Original prototype, destroyed in August 1975.
Dart Aero-5
Second aircraft built along the same lines. The fuselage was an original design, but the fin and rudder from a Taylorcraft were used, along with Aeronca wings. A later owner was reportedly constructing a new set of longer, all-metal wings for the aircraft in 1983. As of May 2011 this aircraft was still registered with the Federal Aviation Administration and based in Milo, Iowa.

Specifications (K-W)

See also

References

1950s United States sailplanes
Homebuilt aircraft
Aircraft first flown in 1957
Didgori-1. The Didgori-1 () is a Georgian-made armoured personnel carrier developed by the "Delta" research center of the Ministry of Defence and part of the Didgori-series APC family currently constructed in five baseline variants.

Technical characteristics
The vehicle is assembled on and around the chassis of US Ford Super Duty pickup trucks. It is equipped with FLIR Systems thermal and night vision imaging devices provided for front and rear view. Information from the cameras is displayed on monitors for the driver, the commander and the passenger section. The system is interlinked with a special navigation system GPS.

Armor
The armour withstands impacts of 7.62×54mmR AP rounds and 6–8 kg mine blasts at direct contact and from underneath without heavy damage. Further details are unknown, since the composition of the material is classified. The two baseline models are armed with a 7.62×51mm M134 Minigun and the 12.7×108mm NSV machine gun, but can be armed with a wide range of armaments, including ATGMs.

The monocoque steel v-hull provides protection against small arms fire, artillery shell shrapnel, anti-personnel/tank mines and IEDs. Front wheel arches are designed to be blown away to free blast pockets.

Operators

  – in service of the Defense Forces of Georgia.

Gallery

See also

Sources

External links
 First Georgian Armored Personnel Carrier / APC - Didgori
 TAM of Georgia
 STC Delta

Wheeled amphibious armoured fighting vehicles
Armoured cars
Wheeled armoured personnel carriers
Military equipment of Georgia (country)
Military vehicles introduced in the 2010s
Armoured personnel carriers of the post–Cold War period
Graphical Network Simulator-3. Graphical Network Simulator-3 (shortened to GNS3) is a network software emulator first released in 2008. It allows the combination of virtual and real devices, used to simulate complex networks. It uses Dynamips emulation software to simulate Cisco IOS.

GNS3 is used by many large companies including Exxon, Walmart, AT&T and NASA, and is also popular for preparation of network professional certification exams. As of 2015, the software has been downloaded 11 million times.

References

External links

Free emulation software
Computer network analysis
Simulation software
Software using the GNU General Public License
2008 software
Tin(II) 2-ethylhexanoate. Tin(II) 2-ethylhexanoate or tin(II) octoate or stannous octoate (Sn(Oct)2) is a compound of tin. Produced by the reaction of tin(II) oxide and 2-ethylhexanoic acid, it is a clear colorless liquid at room temperature, though often appears yellow due to impurities, likely resulting from oxidation of Sn(II) to Sn(IV).

It is sometimes used as a catalyst for ring-opening polymerization, such as for the production of polylactic acid.

References

Tin(II) compounds
Ethylhexanoates
Hambantota Solar Power Station. The Hambantota Solar Power Station (also known as the Buruthakanda Solar Park) is the first commercial-scale solar power station in Sri Lanka. The photovoltaic solar facility was constructed in Buruthakanda, in the Hambantota District. The plant is owned and operated by the Sri Lanka Sustainable Energy Authority, a state-run organization responsible for renewable resources.

The facility was built in two stages, with the first stage of 737 kilowatt (kW), and the second stage of  in installed capacities. The construction cost of the first  phase is expected to top up to , of which the funds will be provided by the Japanese Government. While the second stage would top a cost of , of which  would be provided by the Korean Government, and  would be borne by the local government. Subcontractor of the second phase is Sunpower Systems (Pvt)Ltd.

Upon completion in late 2012, the entire  facility was expected to produce up to 1.7 gigawatt-hour (GWh) of energy annually,  from the first stage, and  from the second stage. The generated power would be sold to the state-run power company Ceylon Electricity Board, while the revenue would be used to promote rural electrification projects.

See also 

 Energy in Sri Lanka
 List of power stations in Sri Lanka

References 

Solar power stations in Sri Lanka
Buildings and structures in Hambantota District
E-Office Mission Mode Project. The e-Office Mission Mode Project is one of the Mission Mode Project under the National e-Governance Plan, Department of Information Technology of India. The project is being implemented by the Department of Administrative Reform and Public Grievances of India (DARPG) to improve efficiency in government process and service delivery mechanisms.

Features 

The project aims to improve productivity, quality, resource management, turnaround time and increase transparency  by replacing the old manual process with an electronic file system.

The new e-Office system is an integrated file and records management system that allows employees to manage content, search for data internally and collaborate. The file system also enables the electronic movement and the tracking of files, and the archival and retrieval of data. The system is planned to be secure and confidential, automating routine tasks, capable on handling the required workload, with the facility of monitoring work and auto-escalation when there are delays.

The project was launched in 2008 with the expectation of converting the government office into a paperless office within a period of 5 years. The e-Office project, targeted at Central Government offices, is being piloted at e-Governance Division of Department of Information Technology, Training Division of Department of Personnel & Training, Department of Administrative Reforms & Public Grievances.

Similar initiatives 
Other governmental projects similar to e-Office that have been launched in the past include iWDMS (Integrated Workflow and Document Management System) and SmartGov.

References

Further reading 
 Details of e-Office and other NeGP MMPs
 Features of the proposed e-Office system 

E-government in India
SoftBrew. Sowden SoftBrew (or SoftBrew) is a coffee brewing device by the designer George Sowden in 2010.

The device uses an infusion method for brewing coffee with a stainless steel filter and a ceramic pot.

Method 
The SoftBrew brews coffee by infusion (through steeping) in a perforated cylindrical stainless steel filter cup, which can be washed and reused.

Devices similar to the SoftBrew include manual drip coffee makers, French press coffee makers, the Empot, and, to a limited extent, other pour-over and drip coffee filters.

References

Further reading

External links

 Sowden SoftBrew Website

Coffee preparation
List of human-powered aircraft. This is a list of human-powered aircraft by date.

See also
History of human-powered aircraft

References

Further reading

External links

 Chris Roper's online book Human Powered Flying
 Prop designer

 Vélair
 – Yuri human-powered helicopter – YouTube video
 – human-powered ornithopter
 – Snowbird
 – video of first flight for the Snowbird
 – Gamera human-powered helicopter
:de:HV-1 Mufli
 – Snowbird
 – Coolthrust Japan
 – Snowbird

 – Gossamer Condor
 – Mozi video
 – Mozi drawings, photos etc.
 – Mozi article

Lists of aircraft by power source
Journal of Bioactive and Compatible Polymers. The Journal of Bioactive and Compatible Polymers is a bimonthly peer-reviewed scientific journal covering the field of materials science, especially the use of polymers in biomedicine. its editor-in-chief is Kathryn Uhrich (Rutgers University). The journal was established in 1986 and is published by SAGE Publications.

Abstracting and indexing 
The journal is abstracted and indexed in Scopus and the Science Citation Index Expanded. According to the Journal Citation Reports, its 2020 impact factor is 1.756, ranking it 141st out of 160 journals in the category "Biotechnology & Applied Microbiology", 37th out of 41 journals in the category "Materials Science, Biomaterials", and 69th out of 91 journals in the category "Polymer Science".

References

External links 
 

Materials science journals
Bimonthly journals
SAGE Publishing academic journals
Academic journals established in 1986
English-language journals
Chester Swee' Pea. The Swee' Pea was a series of three midget aircraft racers designed by Art Chester.

Design and development
The Swee' Pea was a racing aircraft to compete in the new midget racing class championed by race pilot Art Chester. The aircraft was the third design from Chester with a Popeye comic name.

The midget racer was required to have an engine less than 190 cubic inches in displacement at the time. The Swee' Pea shared a similar short, mid-wing taildragger configuration with other midget racers. The aircraft was unique in that it used a V tail configuration and a single cooling air intake through a large hole in the center of the spinner. The Fuselage is welded tube steel with plywood covered wings.

Operational history
The Swee' Pea was introduced at the 1947 National Air Races, but the V-Tail performed poorly at takeoff speed, and was replaced by a conventional tail for the 1948 Miami races. The top speed was reduced with a conventional tail, so the V-Tail was re-installed.

The Swee' Pea (now Sky Baby) was acquired by the Spirit of Flight Foundation museum in Nampa, ID and is currently on display with other Art Chester artifacts and photos.

Variants
Swee' Pea
Later Renamed "Sky Baby" - one built
Swee' Pea II
Modified with a Y-tail (similar to the Sonex Waiex). Art Chester died in a crash in this plane at the San Diego Air Races on 24 April 1949. - one built
Wimpy
The Swee' Pea modified with the main gear farther back. This aircraft crashed on 25 July 1948 at Rosemead airfield, due to blanking of the v-tail during a slow manoeuvre. - one built

Specifications (Chester Swee' Pea)

See also

References

Racing aircraft
Mid-wing aircraft
Aircraft first flown in 1947
Single-engined tractor aircraft
Journal of Composite Materials. The Journal of Composite Materials is a peer-reviewed scientific journal that covers the field of materials science. Its editor-in-chief is H.Thomas Hahn (UCLA). It was established in 1967 and is published by SAGE Publications in association with the American Society for Composites.

Abstracting and indexing 
The journal is abstracted and indexed in Scopus and the Science Citation Index Expanded. According to the Journal Citation Reports, its 2020 impact factor is 2.591, ranking it 18th out of 28 journals in the category "Materials Science, Composites".

References

External links 
 
 American Society for Composites

SAGE Publishing academic journals
English-language journals
Materials science journals
Academic journals established in 1967
Journal of Elastomers and Plastics. The Journal of Elastomers and Plastics is a bimonthly peer-reviewed scientific journal that covers materials science of elastomers and plastics. The editor-in-chief is Heshmat A. Aglan (Tuskegee University). It was established in 1969 as the Journal of Elastoplastics, obtaining its current name in 1974. The journal is published by SAGE Publications.

Abstracting and indexing 
The journal is abstracted and indexed in Scopus and the Science Citation Index Expanded. According to the Journal Citation Reports, its 2020 impact factor is 1.833, ranking it 257th out of 334 journals in the category "Materials Science, Multidisciplinary" and 68th out of 91 journals in the category "Polymer Science".

References

External links 
 

SAGE Publishing academic journals
English-language journals
Materials science journals
Bimonthly journals
Academic journals established in 1969