omniomni/omni-engineering huggingface dataset:
Ryan Dahl. Ryan Dahl (born 1981) is an American software engineer who is best known for creating the Node.js JavaScript runtime as well as the Deno JavaScript/TypeScript runtime.

Biography 
Dahl grew up in San Diego, California. His mother bought him an Apple IIc when he was six years old, one of his first experiences with technology. Dahl attended a community college in San Diego and later transferred into UC San Diego where he studied mathematics. He went on to attend grad school for Mathematics at the University of Rochester where he studied algebraic topology, which he found "very abstract and beautiful" for a couple of years but later got bored of it because "it was not so applicable to real life".

Ruby work
After graduating, Dahl entered a Ph.D. program, but eventually dropped out, since he did not want to devote the rest of his life to mathematics. Instead, he left for South America, where he started developing web applications in Ruby.

Node.js
On May 27, 2009, Dahl released his project, the Node.js runtime.

In January 2012, after having worked on the Node.js project since 2009, Dahl announced that he would step away from the project and turn operational management over to NPM creator and former Joyent employee Isaac Z. Schlueter.

Dahl gave the following reason for moving on from the project:

Deno
In 2018, Dahl announced Deno, a JavaScript/TypeScript runtime built with V8.

See also
Node.js
Deno

References

External links 

Living people
People associated with JavaScript
American software engineers
21st-century American inventors
1981 births
Johansson Mikrokator. A Johansson Mikrokator (also called Abramson's movement) is a mechanical comparator used to obtain mechanical magnification of the difference in length as compared to a standard. It works on the principle of a button spinning on a loop of string. A twisted thin metal strip holds a pointer, which shows the reading on a suitable scale. Since there is no friction involved in the transfer of movement from the strip to the pointer, it is free from backlash. It was reportedly designed by Hugo Abramson in 1938.

Construction

A metallic strip is twisted and fixed between two ends as shown. Any longitudinal movement (in either direction) will cause the central portion of the strip to rotate. One end of the strip is fixed to an adjustable cantilever and the other end is fixed to the spring elbow. The spring elbow, in turn, is connected to a plunger, which moves upwards or downwards. The spring elbow, which consists of flexible strips and a stiff diagonal acts as a bell crank lever and causes the twisted strip to change length whenever there is a movement in the plunger. This change in length will result in a proportional amount of twist of the metallic strip. The magnification can be varied by changing the length of the spring elbow.

Operation
The instrument is initially calibrated to the standard, and the zero is set to this value. Then, the test specimen are placed on the measuring table and are slid below the plunger of the instrument. Any difference in the measured dimension of the specimen will result in either the lowering or rising of the plunger. The lowering or rising of the plunger will cause the bell crank lever to move in forward or backward direction, and in turn, will twist or untwist the metallic strip. The centre line of the strip is perforated in order to prevent excessive stress.

References

External links 

Mechanical amplifiers
National Coal Heritage Area. The National Coal Heritage Area (NCHA) is a federally designated National Heritage Area encompassing a region of thirteen counties in West Virginia that were the source of "smokeless" bituminous coal through much of the 20th century. The National Heritage Area recognizes the area's cultural and historic qualities and serves to promote tourism, historic preservation and economic development in the region. The idea of the NCHA was first proposed in the early 1990s by Congressman Nick Rahall, and was established on November 12, 1996 by the 1996 Omnibus Parks and Public Lands Management Act. The designated area includes Boone, Cabell, Fayette, Logan, Lincoln, McDowell, Mercer, Mingo, Raleigh, Summers, and Wayne counties.

Exploitation of coal in West Virginia began in the 1840s with the mining and refining of cannel coal in the Kanawha Valley. The principal coal fields in the Heritage Area include the New River, Winding Gulf and Flat Top-Pocahontas coal fields, of which the Pocahontas No. 3 seam was the most valuable. As the coalfields were exploited a network of railroads were developed, primarily by the Chesapeake and Ohio, the Norfolk and Western and the Virginian railways, the latter two associated with the Pocahontas and Winding Gulf fields, respectively. Large industrial corporations acquired extensive holdings as well, with U.S. Steel's U.S. Coal and Coke subsidiary controlling large portions of the Pocahontas and the New River Company and Winding Gulf Collieries controlling their respective regions.

References

External links
  CoalHeritage.org: National Coal Heritage Area website

 
National Heritage Areas of the United States
Protected areas of West Virginia
Coal mining in Appalachia
Mining in West Virginia
History of West Virginia
Industrial history of the United States
Protected areas established in 1996
1996 establishments in West Virginia
Protected areas of Boone County, West Virginia
Protected areas of Cabell County, West Virginia
Protected areas of Fayette County, West Virginia
Protected areas of Logan County, West Virginia
Protected areas of Lincoln County, West Virginia
Protected areas of McDowell County, West Virginia
Protected areas of Mercer County, West Virginia
Protected areas of Mingo County, West Virginia
Protected areas of Raleigh County, West Virginia
Protected areas of Summers County, West Virginia
Protected areas of Wayne County, West Virginia
Tergo. Tergo is the name for a series of forklift trucks from the Swedish manufacturer Atlet AB. In the 80’s Atlet AB was pioneering in ergonomics and operator-centric development of trucks, following the idea that optimal operative efficiency is best created by first optimizing operator’s environment. The result of this philosophy was the Atlet Tergo® trucks that ever since have been manufactured in a variety of models and variants, e.g. Tergo Forte UMS/UHD/UHX.

Sources

External links
Atlet AB

Manufacturing companies of Sweden
Nissan

da:Atlet AB
de:Atlet
fr:Atlet
it:Atlet AB
ru:Atlet AB
sv:Atlet AB
Heldeberg Spirit 103. The Heldeberg Spirit 103, also called the Blue Heron Spirit 103, is an American powered parachute, designed and produced by Heldeberg Designs of Altamont, New York.

Design and development
As its name implies, the Spirit 103 was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of . The aircraft has a standard empty weight of . It features a parachute-style high-wing, single-place accommodation, tricycle landing gear and originally a single  2si 460 engine in pusher configuration. The  Rotax 447 and  Rotax 503 engines are used on current models.

Early models used a large sized  parachute, whereas current models use a smaller and faster  wing.

The aircraft is built from a combination of bolted aluminium and stainless steel tubing. It features a double ring propeller guard that has been roll-over tested. The  fuel tank is made from aluminium. In flight steering is accomplished via foot pedals, or optionally a control stick, that actuate the canopy brakes, creating roll and yaw. On the ground the aircraft has lever-controlled nosewheel steering. The main landing gear incorporates gas strut suspension. The aircraft is factory supplied in the form of an assembly kit that requires 30–50 hours to complete.

Originally marketed by the factory under their own name, the aircraft is now marketed under the brand name Blue Heron, although the manufacturer remains the same.

Specifications (Blue Heron Spirit 103)

References

External links

1990s United States ultralight aircraft
Single-engined pusher aircraft
Powered parachutes
Heldeberg Marathon. The Heldeberg Marathon, also called the Blue Heron Marathon, is an American powered parachute, that was designed and produced by Heldeberg Designs of Altamont, New York.

Design and development
The Marathon was designed to comply with the US FAR 103 Ultralight Vehicles two-seat trainer rules and today is marketed as a light-sport aircraft. The aircraft takes its name from its design goal of an aircraft with long range and endurance and features a range of . It features a parachute-style high-wing, two-seats-in-tandem accommodation, tricycle landing gear and originally a single  Rotax 503 engine in pusher configuration. The  Rotax 582 was the standard engine used on later models.

The aircraft is built from a combination of bolted dural aluminium and stainless steel tubing. It features a double ring propeller guard that has been roll-over tested. The  fuel tank is made from aluminium. In flight steering is accomplished via foot pedals, or optionally a control stick, that actuate the canopy brakes, creating roll and yaw. On the ground the aircraft has lever-controlled nosewheel steering. The main landing gear incorporates gas strut suspension. The aircraft is factory supplied in the form of an assembly kit that requires 30–50 hours to complete.

Originally marketed by the factory under their own name, the aircraft was later marketed under the brand name Blue Heron, although the manufacturer remained the same.

Specifications (Blue Heron Marathon)

References

External links

1990s United States ultralight aircraft
Single-engined pusher aircraft
Powered parachutes
Heldeberg Convertible. The Heldeberg Convertible, also called the Blue Heron Convertible, is an American powered parachute, that was designed and produced by Heldeberg Designs of Altamont, New York.

Design and development
The Convertible was designed to comply with the US FAR 103 Ultralight Vehicles rules for single seaters, including the category's maximum empty weight of . The aircraft has a standard empty weight of . It took its name from the design feature whereby it can be fitted with a second seat for instruction or passenger carrying.

The model features a parachute-style high-wing, single seat, or optionally two-seats-in-tandem, accommodation, tricycle landing gear and a single  Rotax 503 engine in pusher configuration.

The aircraft is built from a combination of bolted aluminium and stainless steel tubing. It features a double ring propeller guard that has been roll-over tested. The  fuel tank is made from aluminium. In flight steering is accomplished via foot pedals, or optionally a control stick, that actuate the canopy brakes, creating roll and yaw. On the ground the aircraft has lever-controlled nosewheel steering. The main landing gear incorporates gas strut suspension. The aircraft is factory supplied in the form of an assembly kit that requires 30–50 hours to complete.

Originally marketed by the factory under their own name, the aircraft was later marketed under the brand name Blue Heron, although the manufacturer remained the same.

Specifications (Blue Heron Convertible)

References

1990s United States ultralight aircraft
Single-engined pusher aircraft
Powered parachutes
Heldeberg Designs. Heldeberg Designs was an American aircraft manufacturer, headquartered in Altamont, New York. The company specialized in powered parachutes.

Originally marketing under its own name, the company marketed its aircraft under the band name Blue Heron Powered Parachutes.

The company ceased manufacturing the Blue Heron line of powered parachutes in 2010. By early 2013 the company website stated: "After over 17 years of serving the aviation community, Heldeberg Designs LLC is wrapping up  operations and will no longer be manufacturing Blue Heron Powered Parachutes nor parts. We would like to thank all of our patrons and feel fortunate to have made so many friends around the world."

Aircraft

References

External links

Defunct aircraft manufacturers of the United States
Powered parachutes
Anomalous Transport Rocket Experiment. The Anomalous Transport Rocket Experiment (ATREX) is a heliophysics experiment that was conducted by NASA's Goddard Space Flight Center out of the Wallops Flight Facility located on the Eastern Shore of Virginia. The mission entailed the use of 5 sounding rockets launched closely in time together, each of which released a chemical tracer into the high-altitude jet stream.

The rocket launches were widely visible to residents of the Eastern seaboard from as far north as New York to as far south as North Carolina, while the tracers were visible throughout the Eastern seaboard. ATREX principal investigator Miguel Larsen said of the chemical tracer release: "They occur in the middle of the night, and they glow, It's not extremely bright, but it's definitely visible."

The mission operating window was set from March 14 to April 3, 2012, with launch windows expected to occur between 11:00 pm and 6:30 am the following morning, local time. The first launch attempt was cancelled due to internal radio frequency interference on one of the instrumented payloads. The malfunction was detected during preparations for the launches during the evening of March 14. Five other launch attempts were subsequently cancelled, primarily due to weather. The launch attempt that took place on the evening of March 20–21 reached T-15 minutes before being put on hold and subsequently canceled due to an equipment problem and weather conditions.

The launch took place just before the launch window closed for the mission at 5 a.m. EDT, Tuesday, March 27, 2012.

Mission details 

The mission used two Terrier Improved Malemute, two Terrier Improved Orion, and one Terrier Oriole sounding rockets. The rockets were launched within a span of 5 minutes and 20 seconds, with one rocket launched every 80 seconds. All five released their chemical tracer payload, which is made up of trimethyl aluminum, at roughly the same time while at slightly different altitudes. Two of the rockets also carried instruments in order to measure atmospheric pressure and temperature, while three different cameras located in North Carolina, New Jersey, and Wallops Flight Facility, tracked the tracers in order to measure how quickly they move away from each other.

References

External links 
 ATREX mission site
 Wallops Flight Facility – Launch Webcast site for the mission.
 ATREX KMZ File for Google Earth – Keyhole Markup Language (KML) file for use with Google Earth.

NASA programs
Articles containing video clips
2012 in spaceflight
Airdrie and Coatbridge Tramways. Airdrie and Coatbridge Tramways operated a tramway service in Airdrie and Coatbridge between 1904 and 1922 when it was taken over by Glasgow Corporation Tramways.

History

British Electric Traction established the Airdrie and Coatbridge Tramways Company to operate this single line tramway between Airdrie and Coatbridge.

Some buses were acquired by the company in October 1911 to run complementary services.

Fleet

1-12 Brush Electrical Engineering Company 1904
13-15 Brush Electrical Engineering Company 1905

Closure

The tramway was purchased for £77,550 (equivalent to £ in )  by Airdrie and Coatbridge Corporations and a connection was made on 30 December 1920 with the Glasgow Corporation Tramways between Coatbridge and Bailleston.

The tramway was acquired by Glasgow Corporation Tramways on 1 January 1922 for the sum of £82,250(equivalent to £ in ).

References

Tram transport in Scotland
4 ft 7¾ in gauge railways in Scotland
Transport in North Lanarkshire
Airdrie, North Lanarkshire
Coatbridge
Aeromarine Model 60. The Aeromarine Model 60 is a twin engine seaplane design from the Aeromarine aircraft company.

Development
The original 1920 specification called for two 180 hp H-S engines. The sole production model produced in 1923 featured Aeromarine U-8-D engines. The prototype was not flown

Design
The Model 60 is a five-passenger enclosed biplane seaplane with twin pusher engines.

Specifications (Aeromarine Model 60)

References

Flying boats
Aeromarine aircraft
Biplanes
1920s United States civil aircraft
Twin piston-engined pusher aircraft
Aeromarine AT. The Aeromarine AT (Army Transport) was a proposed passenger biplane from Aeromarine.

Design
The Aeromarine AT was a six-passenger enclosed biplane with an open cockpit for the pilot. The aircraft featured an upper wing with a large nine-foot chord, and a thinner lower wing with a two-foot chord. The cabin featured oval windows with a small overwing cabin door.

Specifications (AT)

References

Aeromarine aircraft
GSL/GRSE series of Interceptor Boats. GSL/GRSE series of Interceptor Boats are Indian high speed patrol boats assembled by Garden Reach Shipbuilders & Engineers Limited (GRSE), Kolkata and  Goa Shipyard Limited (GSL), Goa.

They were designed by Greek shipbuilder, Motomarine, later on GRSE bought this design. GRSE is assembling it at its shipyard in the Bay of Bengal, whereas GSL is also simultaneously assembling the same boats in its Arabian Sea yard. They are being built as per the contract contracted by GSL and GRSE with Ministry of Home Affairs in March, 2008 for various state marine police under the Coastal Security Scheme. The armoring of the patrol boats is being done by MKU Pvt Ltd.

Variants
There are two variants of GSL/GRSE Interceptor Boat: Hell raisers and Invaders.

Hell Raiser

The 12-tonne vessel is built of glass-reinforced plastic, has a length of 13 metres with maximum draught at full load 0.90 m and has a bulletproof cabin. It has a water-jet propulsion giving high speed and ability to operate in shallow water. The vessel endurance is 75 nautical miles and can further cover 25 nautical miles with the help of reserved fuel. The vessel can travel at the maximum speed of 35 nautical miles per hour. The boats are highly seaworthy, unsinkable type (having 10% reserve buoyancy even when filled with water) and are able to sustain operation up to sea state 3 in open sea and also in breaking sea waves near the coast while in shallow water. The vessel is equipped with ultra modern navigation and GPS (Global Positioning System) and can carry a crew of 4 with patrol party of 16. It has facilities for mounting light machine guns and other weapons on board. The per unit cost of vessel is Rs. 25 million (2010).

Invaders

Invaders is 9.60 m in length, have weight of 5 tonnes and is capable of operating at 35 knots on full load. It have maximum draught of 0.65 m at full load. It can carry four crew members along with a patrolling party of 10 persons and is equipped with life saving, fire fighting and communication facilities. The boat is fitted with two outboard motors of 275 hp each for propulsion and maneuvering. The per unit cost of vessel is Rs. 10-11 million (2008).

See also
Solas Marine Fast Interceptor Boat
L&T Interceptor Class fast attack crafts
Couach fast interceptor boats
Cochin Fast Patrol Vessels
Alcock Ashdown Survey Catamaran
Manoram class ferry
GSL Class Advanced Offshore Patrol Vessel

References

External links
Times of India - Non-availability of staff leaves interceptor boats stranded
Gujarat marine police gets first interceptor boat
Invader 
Hellraiser Rigid Inflatable Boat 
35 Knots interceptor
40 Knots interceptor

Patrol vessels of the Indian Navy
Patrol boat classes
Achilles (1906–1912 motorcycle). The Achilles was a motorcycle manufactured between 1906 and 1912 in the former Czechoslovakia. The bikes were powered by 3.5 hp single-cylinder and 5 hp V-twin engines built by Fafnir and Zeus.

References

External links
Unrestored 5hp V-twin

Motorcycle manufacturers of Czechoslovakia
Defunct manufacturing companies of Czechoslovakia
Achilles (1953–1957 motorcycle). The Achilles company built scooters and mopeds in West Germany between 1953 and 1957. The moped was powered by a 48cc engine, while the scooters were powered by 98cc and 123cc Sachs engines. When the factory closed down, the British Norman Cycles firm purchased the production equipment to manufacture their own moped.

References

External links
 48cc Sports model

Motorcycle manufacturers of Germany
Adma (motorcycle). The Adma was a motorcycle manufactured in Germany between 1924 and 1926. The bikes were powered by 169cc two-stroke engine with an internal flywheel.

Adma began its production at a time when hundreds of small factories in Germany began making motorcycles. This was their response to the need for light, inexpensive transportation that had arisen after World War I. Because of the large number of brands, they were forced to find customers in their own region, because a large dealer network could not be built up. Many of these brands purchased built-in engines from other brands, but Adma chose the much more expensive option of developing its own engine block. Like most of these small manufacturers, they had to cease production very soon.

References

Motorcycle manufacturers of Germany
Indian Rotorcraft. Indian Rotorcraft Limited (IRL) is a company specialising in the manufacture of helicopters within India for the global market. Established in 2010, it is operated as a joint venture between Indian conglomerate Tata Sons and Anglo-Italian defense company Leonardo S.p.A. Ground was broken on a dedicated facility at Rajiv Gandhi International Airport, Hyderabad in March 2012; its completion has been delayed reportedly due to protracted rulings from overseeing Indian government agencies.

History
Indian Rotorcraft was founded upon a partnership agreement signed between Tata Sons and Anglo-Italian helicopter manufacturer AgustaWestland (a company which has since been integrated into Leonardo S.p.A. in 2016) during January 2010. At the time, India was viewed by helicopter manufacturers as one of the biggest potential growth markets. Speaking of the venture in 2012, Ratan Tata, chairman of Tata Sons, stated: "The project is integral to our plans in the aerospace sector and we look forward to an enduring and successful partnership with AgustaWestland."

During March 2012, Indian Rotorcraft broke ground on a 40,000m2 new facility adjacent to Rajiv Gandhi International Airport, Hyderabad, India; once complete, this site, which includes a main assembly facility, flight hangar, offices and several helicopter landing pads, will accommodate the assembly, customisation and flight-testing of helicopters for the global market. The first helicopters to be manufactured by the joint venture is slated to be the AgustaWestland AW119Ke; other types, such as the AgustaWestland AW101, are likely to follow in the future. Tata have mooted plan to manufacture up to 80 per cent of the Sikorsky S-92 at the facility as well. In addition to whole rotorcraft, the joint venture shall also engage in the manufacture of components for various other military and commercial aircraft.

Assembly activity, which is to reportedly have the initial capacity to complete a maximum of 30 helicopters per year, was at one point slated to commence during April 2014. During summer 2015, it was reported that further delays to starting assembly were likely as the Foreign Investment Promotion Board (FIPB), an Indian government agency, repeatedly deferred a pending decision on the proposal. During September 2015, after two years of deferment, the proposal was at last cleared by the FIPB, allowing work to proceed; at the time, an Indian Rotorcraft spokesperson was unwilling to commit to a final timeframe for production rollout. However, during May 2016, another pending ruling by the FIPB was deferred without any stated reason; allegedly, the FIPB is liaising with the Indian Ministry of Defence on the matter. The Indian government's apparent hesitancy on the issue has been alleged to be linked to the 2013 Indian helicopter bribery scandal.

References 

Aircraft manufacturers of India
Manufacturing companies based in Hyderabad, India
Leonardo S.p.A.
Tata Sons