omniomni/omni-engineering huggingface dataset:
Silicon boride. Silicon borides (also known as boron silicides) are lightweight ceramic compounds formed between silicon and boron. Several stoichiometric silicon boride compounds, SiBn, have been reported: silicon triboride, SiB3, silicon tetraboride, SiB4, silicon hexaboride, SiB6, as well as SiBn (n = 14, 15, 40, etc.). The n = 3 and n = 6 phases were reported as being co-produced together as a mixture for the first time by Henri Moissan and Alfred Stock in 1900 by briefly heating silicon and boron in a clay vessel. The tetraboride was first reported as being synthesized directly from the elements in 1960 by three independent groups: Carl Cline and Donald Sands; Ervin Colton; and Cyrill Brosset and Bengt Magnusson. It has been proposed that the triboride is a silicon-rich version of the tetraboride. Hence, the stoichiometry of either compound could be expressed as SiB4 - x where x = 0 or 1. All the silicon borides are black, crystalline materials of similar density: 2.52 and 2.47 g cm−3, respectively, for the n = 3(4) and 6 compounds. On the Mohs scale of mineral hardness, SiB4 - x and SiB6 are intermediate between diamond (10) and ruby (9). The silicon borides may be grown from boron-saturated silicon in either the solid or liquid state.

The SiB6 crystal structure contains interconnected icosahedra (polyhedra with 20 faces), icosihexahedra (polyhedra with 26 faces), as well as isolated silicon and boron atoms. Due to the size mismatch between the silicon and boron atoms, silicon can be substituted for boron in the B12 icosahedra up to a limiting stoichiometry corresponding to SiB2.89. The structure of the tetraboride SiB4 is isomorphous to that of boron carbide (B4C), B6P, and B6O. It is metastable with respect to the hexaboride. Nevertheless, it can be prepared due to the relative ease of crystal nucleation and growth.

Both SiB4 - x and SiB6 become superficially oxidized when heated in air or oxygen and each is attacked by boiling sulfuric acid and by fluorine, chlorine, and bromine at high temperatures. The silicon borides are electrically conducting. The hexaboride has a low coefficient of thermal expansion and a high nuclear cross section for thermal neutrons.

The tetraboride was used in the black coating of some of the space shuttle heat shield tiles.

References

Inorganic silicon compounds
Borides
Ceramic materials
Hatherleigh CAVOK. The Hatherleigh CAVOK is a Swiss mid-wing, single-seat motor glider that was produced by Heatherleigh Consulting of Bussigny-près-Lausanne, first flying on 13 December 2001.

The aircraft's name is a common aviation meteorology abbreviation meaning Ceiling And Visibility OK and implying good flying weather.

Design and development
The CAVOK project began in the middle of 2000. The primary development model was the CAVOK 10, with a wingspan of , extendable to  with wing tip extensions. The design goals for the aircraft included maximizing performance for the price, compliance with JAR 22 rules for standard class sailplanes and also European ultralight category rules, including French ULM regulations. Certification was also intended to JAR-VLA standards for countries that lack an ultralight category.

The aircraft is built from fibreglass and features a fixed, fuselage-mounted, single-cylinder, two-stroke Gas Gas motorcycle engine, driving a retractable two-bladed fixed-pitch tractor propeller. The engine can be started and run before extending and engaging the propeller. The wing features flaperons and, unlike most other aircraft in this category, lacks wing-mounted air brakes, the brake being fuselage mounted. The landing gear consists of fixed nose, centre and tail wheels along with auxiliary wheels  out on the wing from the fuselage. The aircraft is finished in white polyurethane paint.

The aircraft was designed for quick assembly and disassembly by one person without assistance, as no part weighs over . The aircraft is normally transported by towed trailer.

The last news release the company put out, on 14 December 2002, indicated that development work had been delayed, but was underway at that time. The company website had been removed by 2005 and it is likely that only prototypes were completed and flown.

Specifications (CAVOK 10)

See also

References

External links
CAVOK first flight photos

2000s Swiss sailplanes
Adaptive traffic control. Adaptive traffic control system (ATCS) is a traffic management strategy in which traffic signal timing changes, or adapts, based on actual traffic demand.  This is accomplished using an adaptive traffic control system consisting of both hardware and software.

Every Day Counts initiative
The U.S. Federal Highway Administration, through its Every Day Counts initiative, is working to accelerate the adoption of adaptive signal control technologies in the U.S.  Its website states, "Real-time management of traffic systems is proven to work, yet these systems have been deployed on less than 1 percent of existing traffic signals. FHWA is now working to bring these technologies to the rest of the country."

Examples
InSync adaptive traffic control system is a real-time adaptive traffic control system that enables traffic signals to immediately adapt to traffic demand.

MASSTR (Meadowlands Adaptive Signal System for Traffic Reduction) located in the Meadowlands Region of northern New Jersey will incorporate over 128 signals when complete. As of June 2013, over 50 of the signals were operational. The project built by the New Jersey Meadowlands Commission (NJMC) is a network self-adaptive signals utilizing the Sydney Coordinated Adaptive Traffic System (SCATS). MASSTR was awarded a $10 million TIGER2 grant from the Federal Highway Administration.

MOVA (Microprocessor-Optimised Vehicle Actuation) uses inductive loops in the carriageway to detect traffic on each approach to an isolated junction, and vary the signal timings as required.

See also
 SURTRAC adaptive traffic control system
 SCOOT
 Adaptive Traffic control system using AI - Pushpak.ai

References

External links
Official site of the Federal Highway Administration
AI for calculating density of vehicle presence on road 

Traffic signals
ISO 2921. ISO 2921 is a specification created by the International Organization for Standardization for a method in determining the temperature-retraction characteristics of stretched vulcanized rubber. Since many thermoplastic elastomers have a yield point at 5% to 20% elongation, the standard does not cover them. 

It is based on the principle of applying a tension force to the sample of rubber, then cooling the rubber until it no longer retracts by itself. Then, warming the rubber and recording at what temperature the rubber shrinks back to specific sizes. The rubber is placed in a fluid bath, though gasses may also be used if it doesn't change the result of the experiment.

References

02921
Rubber
S.L.N College of Engineering. The H.K.E Society's S.L.N College of Engineering in Raichur, Karnataka was founded in 1979. It is affiliated with Visvesvaraya Technological University, Belgaum, the university to which all engineering colleges in Karnataka are affiliated. From 2007,

History
SLNCE was established  by the Hyderabad Karnataka Education Society. It owes its name to SAROJINI LEELADHARAN NAIR.  It offers 6 graduate programs besides research programs in two disciplines. It is affiliated to Visvesvaraya Technological University, Belgaum and its undergraduate programs are accredited by the National Board of Accreditation (NBA) of the All India Council for Technical Education (AICTE).

Campus
Spread over , the campus contains various buildings with striking architecture, state-of-the-art classrooms and laboratories.

Education programs

Graduate programs
 Mechanical Engineering (1979)
 Civil Engineering (1979)
 Computer Science and Engineering
 Electronics and Communication Engineering
 Information Science and Engineering
 Textile Technology

Postgraduate Program (M.B.A.)
 Master of Business Administration 2011

References

Engineering colleges in Karnataka
Affiliates of Visvesvaraya Technological University
Education in Raichur
Universities and colleges in Raichur district
Sonex Electric Sport Aircraft. The Sonex Electric Sport Aircraft (ESA) was a two-place (one place with additional batteries) aircraft design that was under development by Sonex Aircraft, using the  Sonex e-Flight electric system for thrust.  Sonex designed this aircraft as a part of an attempt to develop alternate fuels, to ensure feasibility of inexpensive sport aviation in the future.

The last update on the project was put out by the company in 2011 and the webpage about it was removed in 2017.

Design and development
The ESA was designed to use the Sonex e-Flight electric system, which was concurrently under development. The airframe was developed from the Xenos, and was not intended to compete with the other aircraft in the Sonex line.  The initial flights, however, have used a Waiex airframe, and were centered around testing the electric power system.  The aircraft was to be aluminum riveted, and features were to include a shortened wingspan and tail tips (in relation to the Xenos), aerobatic wing tips, 8' flaps instead of spoilers, and for the center of gravity, an auxiliary battery and controller in the tail cone.

The electrical system was 270 volts and 200 amps, and was intended to be adjustable to different power outputs.  As of 2007, the brushless DC-Cobalt motor was designed be very lightweight, at only , to operate at 90% efficiency, and to use Lithium-ion and Lithium-polymer batteries.

For safety, the batteries were contained in "safety boxes", which were designed, in the event of a problem, to direct fire or explosion through designated holes, and to help cool the cells normally.  In the final version, the batteries were intended able to be charged in the aircraft, while retaining the ability to be easily removed and swap them with other batteries.  The design won the Lindberg Electric Aircraft Prize for the "Best Electric Aircraft Sub-System or Component Technology" at Airventure 2010, and at that time the first completion of a production aircraft was anticipated for the end of 2011.

Specifications

References

External links
Manufacturer Website
ESA Development website archives on Archive.org
E-flight Updates with video archives on Archive.org

2010s United States sport aircraft
Light-sport aircraft
Homebuilt aircraft
Single-engined tractor aircraft
Electric aircraft
Electric Sport
Aircraft first flown in 2010
V-tail aircraft
Wilks Creek Bridge. Wilks Creek Bridge is a former timber and bluestone road bridge on the Yarra Track, located just off the Black Spur route, between Narbethong and , Victoria, Australia.

It was built in 1870 to the design of colonial Public Works Department engineer Clement Wilks as part of the construction of a new road to the Woods Point and Jordan Goldfields. Like many bridges of the period, it had a timber superstructure employing squared beams supported by struts and straining pieces, on cut bluestone abutments.

The bridge was remodelled around 1900 by engineer John Monash of the famous bridge-engineering firm of Monash and Anderson.

It was last used for heavy vehicular traffic in 1980 following the realignment of Marysville Road, and was left to decay until its demolishment in 2008. All timber traces of the bridge were destroyed in the 2009 Black Saturday fires. The handcrafted bluestone masonry wingwalls and abutments, especially shaped to receive timber struts, rate among the earliest of its kind surviving intact in Victoria.

See also
 The Big Culvert

References

External links
 Obituary: Clement Wilks, 1819-1871  Minutes of the Proceedings of the Institution of Civil Engineers, Vol.33 January 1872 pp. 275–276 - Thomas Telford-ICE Virtual Library 

Beam bridges in Australia
Bridges completed in 1871
Road bridges in Victoria (state)
1871 establishments in Australia
2008 disestablishments in Australia
Former bridges in Australia
Wooden bridges in Australia
Stone bridges in Australia
Bachelle Electric. The Bachelle Automobile company was an electric automobile company from Chicago, Illinois.

History
In fall of 1900, a man named Otto von Bachelle (a noted electrical engineer) made his first electric car. It was a small, compact car, and was only produced in small numbers. It did not survive after 1904. von Bachelle was last heard from in 1915. The cars could travel  on one charge. Otto later became consulting engineer at Hupmobile.

References

Electric vehicles introduced in the 20th century
Manufacturing companies based in Chicago
Motor vehicle manufacturers based in Illinois
Defunct motor vehicle manufacturers of the United States
Electric vehicle manufacturers of the United States
1900s cars
1910s cars
Veteran vehicles
Vehicle manufacturing companies established in 1900
Defunct companies based in Chicago
Juvenelle Rosario Skua. The Juvenelle Rosario Skua is a Brazilian mid-wing, T-tailed, single-seat motor glider that was designed and produced by Juvenelle Rosario of Florianópolis. When it was available it was supplied as a complete aircraft.

Design and development
Named for the seabird of the same name, the aircraft is built predominantly from carbon fibre and intended to qualify as a European microlight.

The aircraft is a conventional self-launching sailplane, with a retractable engine. The  span wing mounts dive brakes and holds water ballast. The wings can be folded for storage or ground transportation. The aircraft reportedly has a very low empty weight of .

In 2003 production was reported at one per month. At that time two customer aircraft had been completed and three were on order at a price of US$15,000 each.

Specifications (Skua)

See also

References

2000s Brazilian sport aircraft
Dormagen Chempark station. Dormagen Chempark station is a station in the town of Dormagen in the German state of North Rhine-Westphalia. Chemiepark Dormagen is the location of a large Bayer works. The station is on the Lower Left Rhine Railway and it is classified by Deutsche Bahn as a category 6 station. The station was opened briefly during World War I as Hackenbroich. It was reopened in 1948 and was renamed Dormagen Bayerwerk between 1954 and 1957. It was renamed Dormagen Chempark on 15 December 2013.

The station is served by line S 11 of the Rhine-Ruhr S-Bahn, running between Düsseldorf Airport and Bergisch Gladbach every 20 minutes during the day.

See also  
 Leverkusen Chempark station
 Krefeld-Hohenbudberg Chempark station

References

Rhine-Ruhr S-Bahn stations
S11 (Rhine-Ruhr S-Bahn)
Railway stations in Germany opened in 1948
Buildings and structures in Rhein-Kreis Neuss
R.M.K. College of Engineering and Technology. R.M.K. College of Engineering and Technology (RMKCET) is an engineering college in the village of Puduvoyal, in the municipality of Thiruvallur, in the Indian state of Tamil Nadu. It is governed by the Lakshmikanthammal Educational Trust, affiliated with Anna University, Chennai, and approved by AICTE. It is a Telugu minority institution. It is accredited by NAAC with A grade. It is also ISO 9000-2015 certified institution.

The college opened in 2008 with four departments: Computer Science and Engineering (CSE), Electronics and Communication Engineering (ECE), [Very Large Scale Integration] (VLSI) and [Artificial Intelligence in Data Science] (AI&DS).It now has more than 1700 students in various departments such as AI, ECE, CSE, and VLSI. The campus is about . The college has a fleet of 30 buses for transportation of students covering all most Chennai and Tiruvallur dist.

Courses offered

B.E. in Computer Science and Engineering
B.E. in Electrical and Electronics Engineering
B.E. in Electronics and Communication Engineering
B.E. in Mechanical Engineering

The campus is located at Puduvoyal village at a distance of about 330 km from Chennai on the Chennai-Vijayawada National Highway. It is easily reachable from Chennai by buses proceeding to Gummidipoondi/Sulurpet/Nellore/Naidupeta/Sri Kalahasthi/Tirupati. The suburban trains between Chennai and Gummidipoondi stop at Kavaraipettai station and from there the college is 3km away.

The institute has a huge complex that houses class rooms, air conditioned seminar halls, central library, departmental libraries and Internet with 2 Kbit/s connectivity. There are separate hostels for men and women.

RMK Group of Institutions 
 RMK Engineering College
 RMD Engineering College
 RMK College of Engineering and Technology
 RMK Matriculation School
 Sri Durga Devi Polytechnic
 RMK Residential School

References

External links
 RMK Engineering College Official Site

Engineering colleges in Tamil Nadu
Colleges affiliated to Anna University
Education in Tiruvallur district
Educational institutions established in 2008
2008 establishments in Tamil Nadu
Chris Carpenter (sound engineer). Chris Carpenter is an American sound engineer. He has been nominated for 3 Academy Awards in the category Best Sound. He has worked on more than 130 films since 1979.

Selected filmography
 Geronimo: An American Legend (1993)
 Independence Day (1996)
 The Mummy (1999)

References

External links

Year of birth missing (living people)
Living people
American audio engineers
Oskbes Aviatika MAI-920. The Oskbes Aviatika MAI-920 is a Russian high-wing, cable-braced, single-seat, training glider that was designed and produced by Oskbes MAI Moskau Aviation Institut, first flying in 1992.

Design and development
The MAI-920 was developed from the powered Oskbes Aviatika MAI-890 ultralight, which can also be used to aerotow the MAI-920 glider. The MAI-920 has a 90% parts commonality with the MAI-890. The glider design uses a higher aspect ratio monoplane wing in place of the MAI-890's biplane wing. It is intended to be a simple and robust student solo glider.

The MAI-920 glider is made from aluminium tube and fabric, with the nose cone built from fibreglass. Its  span wing is cable-braced from a kingpost. The landing gear is a fixed monowheel gear, with a nose skid or caster and a tail skid.

Specifications (MAI-920)

See also

References

External links

1990s Russian sailplanes
High-wing aircraft
Aircraft first flown in 1992
Loening XSL. The Loening XSL was an American submarine-based reconnaissance flying boat designed and built by Grover Loening Aircraft Company for the United States Navy.

Design and development
First flown in 1931, the Loening XSL was a lightweight flying-boat designed to be folded up and stored in an 8-foot-diameter watertight tube on the deck of a submarine. It was a single-seat, mid-wing monoplane powered by a  Warner Scarab radial engine mounted above the wing driving a pusher propeller. Originally designated the XSL-1 by the Navy, it was re-designated XSL-2 in 1932 when it was re-engined with a  Menasco B-6 engine. Only the prototype was built; it was not ordered into production.

Variants
XSL-1
Prototype with a Warner Scarab engine.
XSL-2
Prototype re-engined with a Menasco B-6 engine.

Specifications (XSL-1)

See also

Notes

Bibliography
 

SL
1930s United States military reconnaissance aircraft
Submarine-borne aircraft
Flying boats
High-wing aircraft
Single-engined pusher aircraft
Aircraft first flown in 1931
Jonsereds Fabrikers AB. Jonsered is a brand of chainsaws and other equipment, owned by Husqvarna AB.

History 
The Scotsman William Gibson, who had immigrated to Sweden in his youth, founded a textile mill in 1832 in Jonsered. His sons later took over the company that remained in the family's control until the 1920s. In 1872 the company became a limited company, Jonsered Fabriker AB, diversifying its textile output. By the 1880s it was producing and exporting woodworking machines along with its textiles, with one notable production being canvas. The Jonsered sailing canvas was very well known in the 1800s in Sweden and gave the company a good reputation. Another important textile product were fire hoses (until 1975), many of them still in use today.

In the 1950s Jonsereds Fabrikers AB started producing the chain saw model "Raket" (Rocket) which, along with its successors, became a major success and Jonsereds started exporting chain saws worldwide with the biggest export market being North America. Another success was the forest crane production that started about 1959. The most profitable unit was the tarpaulin production. In 1969 the company started to shut down its textile part and evolving into a pure engineering industry with customers in the forest industry as the main customer group, with the tarpaulin unit being kept within the company.

In 1975 it became a subsidiary of Investment AB Asken. Asken came in financial difficulties and parts of Jonsereds AB were shut down and others sold. In 1978 it was sold to Electrolux and production of chainsaws was later moved to Husqvarna. Husqvarna still maintains an R&D unit in Jonsered. The tarpaulin unit was also acquired by Electrolux but later sold. The brand "Jonsereds" is still in use by its current owner Hallbyggarna.

External links 
Jonsered

Companies established in 1832
Chainsaws
Swedish brands
Electrolux brands
Textile industry of Sweden
Companies based in Västra Götaland County
Meka Robotics. Meka Robotics was a San Francisco–based company that made robotic systems.

History
Founded in 2006 by Aaron Edsinger and Jeff Weber, it was originally a spin-off of the MIT Computer Science and Artificial Intelligence Laboratory before the founders relocated to San Francisco.

In 2007, the company provided a forearm and hand for MIT Media Lab's new robot, Nexi.

In 2008, the company teamed with the Socially Intelligent Machines Lab at the Georgia Institute of Technology to develop Simon, an upper torso humanoid platform for human robot interaction.

In 2012, the company teamed with the Human Centered Robotics Group at the University of Texas at Austin to develop HUME, a "bipedal robot for human-centered hyper-agility."

In 2012, the company entered into a joint venture with Willow Garage and SRI International to found Redwood Robotics, a company specializing in robotic arms.

On December 5, 2013, Google X acquired Meka Robotics.

Products

 M1 Mobile Manipulator
 S2 Humanoid Head

See also
 Domo (robot)

References

External links 
 

Defunct robotics companies of the United States
Companies based in San Francisco
Technology companies based in the San Francisco Bay Area
2006 establishments in California
Google acquisitions
Commercial Solvents Corporation. Commercial Solvents Corporation (CSC) was an American chemical and biotechnology company created in 1919.

History
The Commercial Solvents Corporation was established at the end of World War I; earning distinction as the pioneer producer of acetone and butanol by fermentation processes developed and patented by Dr. Chaim Weizmann. Terre Haute, Indiana was chosen to be the site of CSC's research as this location made possible the expedient translation of new processes from the laboratory and demonstration plant into full production.

As early as 1917, the corporation began work in Terre Haute, Indiana. It developed the conversion of corn and other grains into ethanol by fermentation. They later produced riboflavin by microbial action.

Presidents
Philip G. Mumford 1922 to 1928.
William Davis Ticknor Sr. 1920 to 1922 and 1928 to 1938, was president and chairman of the board.
Theodore P. Walker 1938 to 1947.
Henry E. Perry 1947 to 1950.
J. Albert Woods 1950 to 1959.
Maynard C Wheeler 1959 to 1966.
Robert C. Wheeler 1966 to 1973.
William S. Leonhardt 1973 to 1975.

References

Chemical companies of the United States
Ethanol
Defunct companies based in Indiana
Terre Haute, Indiana
Chemical companies established in 1919
Technology companies established in 1919
American companies established in 1919