omniomni/omni-engineering huggingface dataset:
6B. 6B or 6b or VI-B may refer to :
 Keratin 6B, a type II cytokeratin
 Oflag VI-B, a World War II German POW camp for officers located  SW of the small town Dössel 
 REL-6B Radar, a ground air surveillance and guidance radar
 Rumpler 6B, a 1916 German single-engine floatplane fighter
 Season 6B, a popular fan theory related to the long-running British science fiction television series Doctor Who
 Stalag VI-B, a Nazi World War II camp for prisoners of war
 TUIfly Nordic IATA airline designator
 British Rail Class 203 Diesel-electric Multiple Units, which were classed as 6B (6 coaches, Buffet) pre-TOPS
 "6B" (Fringe), an episode of the television series Fringe
 6b/8b encoding, six-bit codes in telecommunications
 Supermarine S.6B, a British racing seaplane
 HAT-P-6b, a transiting extrasolar planet
 Northrop Grumman EA-6B Prowler, an American, twinjet all-weather attack aircraft
6B, the production code for the 1982 Doctor Who serial Earthshock

See also
B6 (disambiguation)
Mississauga Truck and Bus Collision. Mississauga Truck and Bus Collision is a rebuilder of buses and trucks in Southern Ontario. Located in Milton, Ontario, MTB has done work for various transit authorities in Ontario, Canada and the United States. MTB also rebuilds and resells second hand buses to other agencies:

 Toronto Transit Commission - CNG bus rebuilds and conversion to diesel
 Ajax Pickering Transit Authority
 Mississauga Transit
 Barrie Transit

MTB rebuilds bus and trucks damaged by collisions, fires and other sources of damage. MTB also made Glider kits to agencies using license versions of existing buses builders, such as Orion Bus Industries.

Products

 MTB Glider kit buses (No longer in production)

See also

 Dupont Trolley Industries

References

 MTB website

Bus manufacturers of Canada
Integrated safe system of work. Integrated safe system of work (ISSOW) is used in hazardous industry to request, review, approve and document tasks to be carried out by frontline workers. It integrates permit-to-work, risk assessment and isolation management under a single electronic system, providing safety improvements to the user.

Thought to have originated in the North Sea upstream oil industry it was actually used several years before within the Power Industry, ISSoW software now forms a significant segment of the enterprise software market.

History
ISSOW has now become synonymous with electronic permit-to-work (e-PTW). The North Sea began adopting several ISSOW suppliers in 2000s, when it was first rolled out to BP's North Everest Platform. From there a number of the major operators in the North Sea oil industry started to adopt this electronic safety system.

As of 2012, around 80% of the North Sea use an ISSOW product in some form or another, as it is widely recognised as a key frontline safety system. Between 2001 and present, ISSOW began to be utilised by some of the major operators including, but not limited to, Shell, Exxon Mobil, BG Group, and Chevron. ISSOW systems are used in oil & gas industry around the world.

See also
Process safety
Risk assessment

References

Petroleum production

Process safety
T-slot structural framing. T-slot structural framing is a framing system consisting of lengths of square or rectangular extruded aluminium, typically 6105-T5 aluminium alloy, with a T-slot down the centerline of one or more sides.

It is also known under several generic names, such as aluminium extrusion, aluminium profile and 2020 extrusion if the cross-section is 20x20 mm, alongside brand names, such as 80/20 framing.

While the precise history of the T-slot framing system is not known, advancement in extrusion press technology in the early 1950s allowed for economic production of aluminium profiles, and examples of use can be found from the early 1960s.

Although no published standard defines the system, it is produced in a series of conventional sizes which allows for compatibility between manufacturers.

There is a variation on T-slot profiles known as V-slot rails where V-slot wheels are slotted into the V-shaped channels of the framing for linear motion in a 3D printer or other CNC machine.

Profiles
T-slot framing is divided into metric and fractional (imperial) categories. The T-slot is always centered along the long-axis of the piece. Pieces are available in each series with a square cross-section. Rectangular cross sections are also available which measure x by 2x (where x is the defined width) - e.g. 40mm by 80mm for 40 series.

See also 
T-slot nut
Strut channel

References

Structural system
George W. Malone. George Wilson Malone (August 7, 1890 – May 19, 1961) was an American civil engineer and Republican politician. He served as a U.S. Senator from Nevada from 1947 to 1959.

Early life
Malone was born in Fredonia, Kansas. As a young man, he moved to Reno, Nevada and worked as a civil and hydraulic engineer there while he was attending the University of Nevada, Reno.

Military service
Malone graduated from college in 1917, and he enlisted in the army when the United States entered World War I. At first, he served in the artillery, but he eventually became a regimental intelligence officer and served in England and France until 1919.

Civilian career
Malone then returned to work in engineering. He served as the state engineer of Nevada from 1927 to 1935.

Political career
Malone entered politics in 1934 when he made his first attempt to be elected to the United States Senate from Nevada. He was defeated by the Democratic incumbent Key Pittman, receiving 33% of the vote. During World War II, Malone worked for the Senate as an engineering consultant on war materials. Malone ran again for a seat in the United States Senate in 1944, this time against Democratic incumbent Pat McCarran. Malone was defeated again, receiving 41% of the vote.

Malone successfully campaigned for a seat in the Senate in 1946. He defeated the Democratic candidate, former Senator Berkeley L. Bunker, receiving 55% of the vote. Malone was reelected to the Senate in 1952, receiving 51% of the vote. He was defeated for re-election in 1958 by Democrat Howard W. Cannon, receiving 42% of the vote. He served in the Senate from 1947 to 1959. He was an isolationist who supported tariffs.

Retirement
Malone continued to live in Washington, D.C. working as an engineering consultant. He made a final political campaign in 1960, for a seat in the United States House of Representatives from Nevada but was defeated. Malone died from cancer in Washington less than a year later, on May 19, 1961, aged 70; he is buried in Arlington National Cemetery.

References

Sources

External links

1890 births
1961 deaths
20th-century American engineers
20th-century Nevada politicians
American military personnel of World War I
Burials at Arlington National Cemetery
Deaths from cancer in Washington, D.C.
People from Fredonia, Kansas
Republican Party United States senators from Nevada
University of Nevada, Reno alumni
Washington, D.C., Republicans
20th-century United States senators
Eigen. Eigen may refer to:

 Eigen (C++ library), computer programming library for matrix and linear algebra operations
 Eigen, Schwyz, settlement in the municipality of Alpthal in the canton of Schwyz, Switzerland
 Eigen, Thurgau, locality in the municipality of Lengwil in the canton of Thurgau, Switzerland
 Manfred Eigen (1927–2019), German biophysicist
 Saint Eigen, female Christian saint
, Japanese sport shooter

See also
 Eigenvalue, eigenvector and eigenspace in mathematics and physics
 Eigenclass, synonym to metaclass in the Ruby programming language
 Eigenbehaviour, with its connection to eigenform and eigenvalue in cybernetics
Syntropy (software). Syntropy is a second-generation object-oriented analysis and software design method developed at Object Designers Limited in the UK during the early 1990s. The goal in developing Syntropy was to provide a set of modelling techniques that would allow precise specification and would keep separate different areas of concern. The approach was to take established techniques, as found in methods such as the Object-modeling technique and Booch method, and reposition and refine them. In recognition that graphical notations were much favoured by the market but lacked rigour, Syntropy adopted ideas from formal specification languages, specifically Z notation, to provide tools for both precise definition of the graphical notations and for the construction of richer models than are possible with pictures alone.

Although development on the Syntropy method stopped some years ago, many of its ideas were subsequently incorporated in the Unified Modeling Language, in the Catalysis software design method, and in other development processes. In particular, Syntropy is a direct ancestor of the Object Constraint Language that forms an integral part of the UML.

Bibliography

See also
 Model-driven architecture (MDA is an OMG Trademark), (MDE is not an OMG Trademark)
 OCL
 Object-oriented analysis and design (OOAD)

Object-oriented programming
Parrot intermediate representation. The Parrot intermediate representation (PIR), previously called Intermediate code (IMC), is one of the two assembly languages for the Parrot virtual machine. The other is Parrot assembly language or PASM. Compared to PASM, PIR exists at a slightly higher abstraction layer, and provides temporary registers and named registers, simplifying code generation.

While Parrot is still evolving, it is currently being used in many different capacities, and has undergone several releases.

Overview
PIR provides a set of abstractions that allow the programmer to ignore certain redundancies in the Parrot bytecode and quickly write code that adheres to the complexities of Parrot, such as the calling conventions.

Abstractions
PIR provides both type abstraction and polymorphism to some degree. For example, the "+" operator can be used with int, num or both:
 .local int a
 .local num b
 a = 1
 b = 1.1
 .local num c
 c = a + b

Calling conventions
The calling conventions in Parrot are complex, but all of that complexity can be hidden by using PIR directives:
 .sub foo
  .param int a
  .param int b
  .local int tmp
  tmp = a + b
  .return (tmp)
 .end
Each of the directives prefixed with a "." expands to the required Parrot bytecode, but does not directly represent any fundamental Parrot operation.

Example
The hello world program in PIR is
 .sub hello :main
  print "Hello world!\n"
 .end
If the program is saved as hello.pir, it can be compiled and executed with this command: parrot hello.pir

External links
 Writing PIR
 PIR examples

Assembly languages
Perl
Negroponte switch. The Negroponte Switch is an idea developed by Nicholas Negroponte in the 1980s, while at the Media Lab at MIT. He suggested that due to the accidents of engineering history we had ended up with static devices – such as televisions – receiving their content via signals travelling over the airways, while devices that could have been mobile and personal – such as telephones – were receiving their content over static cables. It was his idea that a better use of available communication resource would result if the information, (such as phone calls). going through the cables was to go through the air, and that going through the air (such as TV programmes) would be delivered via cables. Negroponte called this process “trading places”.    

At an event organized by Northern Telecom, his co-presenter George Gilder called it the “Negroponte Switch”, and that name stuck from then on. As mobile devices came about, connections were needed for the data network, and bandwidths were required and deliverable in wired or fibre-optic systems growth. It became less sensible to use wireless broadcast to communicate with static installations. At some point the switch took place, as limited radio bandwidth was reallocated to data services for mobile equipment, and television and other media moved to cable.

Influence on internet advocacy 
Cory Doctorow, author and Electronic Frontier Foundation activist, described the process of the switch as unwiring. He framed  this as a move away from a global internetwork, which passes through many chokepoints where data may be controlled and inspected, toward one which uses available bandwidth frugally by passing communications in a mesh and avoiding chokepoints. He and Charles Stross wrote a short story on the process, called Unwirer.  

The description of the switch in terms of a blend of civil liberty and technology was part of an effort to reimplement the Internet in the interests of the users, freedom and democracy.

Influences for change to digital television 
The development of new communication networks helped increase opportunities for new wireless applications. Support for this came from multi-channel video program distributors, network operators, infrastructure suppliers, hardware and software producers, chip makers, and a range of content and application vendors. T.V. providers wanted to supply the households with services, as well as enhancing the system scale. The reallocation of T.V. band spectrums would give social gains towards digital television transitions. Broadcasters that chose to abandon OTA transmissions hoped not to be affected because the expansion of television was influenced by the market.

See also

 Being Digital, a book by Negroponte which discusses the topic
 Interview with Ashok Jhunjhunwala on the switch

References

Wireless networking
Casper 250. The Casper 250/SOFAR is a civilian-developed "backpack" unmanned air vehicle made in co-operation by Top I Vision Ltd and WB Electronics Sp. z o.o. The aircraft is produced by both companies on the same rights: WB Electronics produces it in Poland as WB Electronics SOFAR and Top I Vision in Israel as Casper 250. It is designed as a reconnaissance platform with real-time data acquisition. 
The Casper 250 system consists of the aircraft, its payload, ground controlling system and data-link components.

The Casper 250 was designed for quick deployment and simple human-machine interface.

History 
The Casper 250/SOFAR was created as a joint venture between the two companies. Top I Vision manufactures it under the name Casper 250. Both companies have the same rights to the documentation, copyright and production.

Design 
The device is made entirely of composites and is powered by an electric motor. Due to its small size, the device can be launched manually, or a portable launcher using a stretched rubber band can be used. SOFAR can perform its missions fully autonomously using an autopilot after programming the route, or it can be manually controlled by an operator located in the ground flight control station. Landing can also be performed in automatic and manual mode. The reconnaissance equipment includes interchangeable observation heads that allow the device to operate both day and night. The head with a 3CCD daylight camera with a resolution of 600 thousand pixels, optical zoom x 15, an infrared camera with an image resolution of 324 x 256 pixels and digital zoom x 2 or a digital camera with a resolution of 3 to 5 million pixels.

Applications 
Typical military missions include:
battlefield surveillance;
target acquisition and designation;
battlefield monitoring;
air strike control;
border patrol;
coast guard surveillance;
damage assessment.

The Casper 250 system can also be used for civil or commercial application such as:
pollution control at ground sea and air;
natural disasters monitoring;
forest fire monitoring and control;
fishery and navigation control;
general installations security;
gas pipelines and oil rigs security.

Capabilities 
The aircraft possesses the following characteristics and capabilities:
Electric propulsion, providing for quiet, covert operation;
Hand launched, self-recovery, man-deployable;
GPS navigation allows for fully autonomous missions;
Service ceiling: 2000 feet;
Operational Endurance 1.5 hours;
Line of Sight data-link range > 10 km;
Real-time IMINT (imagery intelligence);
Payload Control.

Users 

  – at least delivered 2 sets of 6 drones.

References

WB Electronics corporate web site
Top I Vision corporate web site
Israeli page about SOFAR

Unmanned aerial vehicles of Poland
Unmanned aerial vehicles of Israel
Lenticular Reentry Vehicle. The Lenticular Reentry Vehicle (LRV), according to a November 2000 Popular Mechanics cover story, was an experimental nuclear warhead delivery system under development during the Cold War by defense contractor North American Aviation, managed out of Wright-Patterson Air Force Base in Dayton, Ohio.

Development 

The project was classified as secret in 1962 and cleared for public release on December 28, 1999. Its declassified technical report had been compiled by R. J. Oberto, Los Angeles Division of North American Aviation.  His report described the LRV as an offensive weapons system. Popular Mechanics obtained information on the LRV from a Freedom of Information Act request after documents describing the project were declassified in 1999.

Related research commenced during the late 1950s.  The Convair/Pomona division of General Dynamics initiated a project entitled Pye Wacket.  Its purpose was to determine the feasibility of developing a missile-defense system based on flying discs (lenticular vehicles).  Although Pye Wacket was terminated by 1961, research had shown lenticular-shaped vehicles possessed sound re-entry characteristics.  Subsequently, research proceeded towards developing crewed lenticular re-entry vehicles during the 1960s and 1970s.

According to Oberto's report, the LRV was a  half-saucer with a flat rear edge.  The design-study documents indicated it could support a crew of four men for six-week orbital missions. Propulsion was from a rocket engine (either chemical or nuclear) and the craft would also have contained an onboard nuclear reactor for electrical power generation.

The existence of the LRV program may lend credence to the military flying saucers theory of unidentified flying objects. However, the flight characteristics of the LRV, as described by these documents, are more similar to a standard orbital space capsule of the 1960s era rather than the rapid motion and sudden velocity change characteristics of many reported UFOs.

As of the publication of the Popular Mechanics article, there was no official confirmation as to whether the Lenticular Reentry Vehicle ever flew.

Dynamic analysis of lenticular missile configurations was conducted by the General Dynamics Pomona Division under Army Missile Command contract in 1963.

References

External links
 Pravda photo journal of the LRV 

Unidentified flying objects
Wright-Patterson Air Force Base
History of Dayton, Ohio
Circular-wing aircraft
Megiddo Airfield. Megiddo Airfield () , known as Shachar 7 by the Israel Defense Forces, is an Israeli airfield located in the Jezreel Valley near Tel Megiddo and  southwest of Afula. It opened in 1942 as RAF Station Megiddo and was used as an auxiliary field to RAF Ramat David. It was used by 6 & 208 Squadron's.

It currently handles private and agricultural flights. It formerly served as an Israeli Air Force base and was decommissioned in the mid-1980s.

Syrian defection

On October 11, 1989, a Syrian Mikoyan-Gurevich MiG-23MLD defected to Israel, landing at Megiddo. The aircraft was subsequently flown by the IAF's Flight Test Center and is now on display at the IAF museum in Hatzerim.

Plans for an international airport
In April 2006, Jezreel Valley Regional Council announced plans to construct an international airport in Megiddo in cooperation with several authorities. The new airport will be located on a 400 dunam (400,000 m2, 100 acres) site, with construction costs estimated at $35 million. Officials report that the airport will undoubtedly increase tourism to the Jezreel Valley and surrounding areas.

References

External links

Megiddo at Airports Worldwide

1942 establishments in Mandatory Palestine
Airports established in 1942
Airports in Israel
Tel Megiddo
World War II airfields in Mandatory Palestine
Trimethylsilyl cyanide. Trimethylsilyl cyanide is the chemical compound with the formula (CH3)3SiCN. This volatile liquid consists of a cyanide group, that is CN, attached to a trimethylsilyl group. The molecule is used in organic synthesis as the equivalent of hydrogen cyanide.  It is prepared by the reaction of lithium cyanide and trimethylsilyl chloride:
LiCN + (CH3)3SiCl → (CH3)3SiCN + LiCl

Structure
The molecule exhibits the structure of a nitrile-like compound. The compound exists in a rapid equilibrium with a small amount of the isomeric isocyanide (CH3)3SiNC. By contrast, the nearly isostructural tert-butyl nitrile does not readily isomerize to tert-butyl isocyanide.  The isocyanide isomer can be stabilized by complexation to metals.

Reactions
Trimethylsilyl cyanide hydrolyzes to give hydrogen cyanide and trimethylsilanol:
(CH3)3SiCN + H2O → (CH3)3SiOH + HCN

In its principal application, it adds across carbon-oxygen double bonds, for example in an aldehyde, to form a new carbon-carbon bond:
 + (CH3)3SiC≡N → N≡C–Si(CH3)3
The product is an O-silylated cyanohydrin.

One use of this reagent is to convert pyridine-N-oxides into 2-cyanopyridine. This transformation is best done in dichloromethane solution using dimethylcarbamoyl chloride as the activating electrophile. It is possible to use benzoyl chloride but the yields and regioselectivity of the addition of the cyano group are lower.

Acetone cyanohydrin can be used to reversibly generate the cyanide anion.
(4)

Safety
Trimethylsilyl cyanide behaves equivalently to hydrogen cyanide, a potent poison. The compound can be disposed of by using a mixture of alkali hydroxide and bleach.

References

Nitriles
Trimethylsilyl compounds