omniomni/omni-engineering huggingface dataset:
AOS/VS II. AOS/VS II is a discontinued operating system for the Data General 32-bit MV/Eclipse computers.

Overview
The AOS/VS II operating system was released in 1988 and was originally to be simply rev 8.00 of the AOS/VS operating system. However, it introduced a new file system which was not compatible with the original AOS and AOS/VS file system and also contained new features like Access control list (ACL) groups. Since some customers did not want to upgrade to the new file system, or invest in new hardware, Data General agreed to continue bug-fix support of an “immortal” revision of AOS/VS, which became known colloquially as AOS/VS “Classic”, while new development would proceed as AOS/VS II, with revision numbers rolled back to 1.00.

Both VS-Classic (rev 7.7x) and VS-II (rev. 3.2x) were updated to survive the Year 2000 problem, although by this time both were obsolescent.

Among the other new features that were part of AOS/VS II were a full TCP/IP stack, NFS support, expanded kernel address space using ring-1 and a logical disk-level user data cache.  /VS (classic) had a file system metadata cache, but no user data cache.

See also
Data General RDOS

Proprietary operating systems
Data General
USNS Sea Lift. USNS Sea Lift (T-LSV-9) was a roll on/roll off (Ro/Ro) cargo ship built for the United States Navy's Military Sea Transportation Service (MSTS), currently the Military Sealift Command (MSC). She became the first ship of Ro/Ro-type to deliver cargo to Vietnam during the war in Indochina.

Construction
She was laid down as SS Sea Lift, a Maritime Administration type (C4-ST-67a) hull under Maritime Administration contract (MA hull 124), on 18 May 1964 by the Lockheed Shipbuilding and Construction Company of Seattle, Washington. It was an improved and enlarged prototype of the . She was launched on 17 April 1965 and sponsored by Mrs. Warren G. Magnuson. Completed on 25 April 1967; delivered to the Navy's Military Sea Transportation Service and placed in service as USNS Sea Lift (T-LSV-9), a roll-on/roll-off cargo ship, on 19 May 1967 with Captain Robert C. Lindquist, Master. She was manned by a civil service crew.

Service
Sea Lift completed her maiden voyage, Oakland to Honolulu in July 1967, then commenced runs to the Far East with cargo consigned to Vietnam. Since then, Sea Lift, redesignated  as vehicle cargo ship  AKR-9 on 14 August 1969, continued her primary mission, the transportation of military vehicles, for the Military Sealift Command in the Pacific.

Was named USNS Meteor (T-AKR-9) 12 September 1975 to join the galactic family of other ro/ro ships, USNS Comet,  and . She  was assigned to the Rapid Deployment Force in April, 1980. Reassigned to the MARAD Ready Reserve Force (RRF) 30 October 1985 and berthed at Alameda, California, Meteor lost her USNS destination and became was one of 31 roll-on / roll-off cargo ships and one of the 55 ships in the RRF in the Sealift Office Program. Later, Meteor was laid up at a "layberth" at Oakland, California in 10-day fully ready status (ROS-10).

In August 1990, while berthed in San Pedro, Los Angeles she was activated to take part in the Gulf War and shuttled between the US East Coast via the Mediterranean to Saudi Arabia until the end of the hostilities. She was deactivated in 1991 and underwent repairs at the National Steel and Shipbuilding Co. shipyard. In October 1993, she was again activated for Fuertes Caminos, a nation assistance exercise in Guatemala; later, she took part in exercises off South Korea. In 2003, she served in the Operation Iraqi Freedom.

On 28 July 2006, she was removed from MSC and withdrawn from the RRF by reassignment to the National Defense Reserve Fleet. She was laid up at the Suisun Bay Reserve Fleet near San Francisco.

References

Attribution

External links

 SS Meteor  
 SS Meteor (T-AKR 9)

Vehicle landing ships of the United States Navy
Ships built by Lockheed Shipbuilding and Construction Company
1965 ships
Piezomagnetism. Piezomagnetism is a phenomenon observed in some antiferromagnetic and ferrimagnetic crystals. It is characterized by a linear coupling between the system's magnetic polarization and mechanical strain. In a piezomagnetic material, one may induce a spontaneous magnetic moment by applying mechanical stress, or a physical deformation by applying a magnetic field.

Piezomagnetism differs from the related property of magnetostriction; if an applied magnetic field is reversed in direction, the strain produced changes signs. Additionally, a non-zero piezomagnetic moment can be produced by mechanical strain alone, at zero fields, which is not true of magnetostriction. According to the Institute of Electrical and Electronics Engineers (IEEE): "Piezomagnetism is the linear magneto-mechanical effect analogous to the linear electromechanical effect of piezoelectricity. Similarly, magnetostriction and electrostriction are analogous second-order effects. These higher-order effects can be represented as effectively first-order when variations in the system parameters are small compared with the initial values of the parameters".

The piezomagnetic effect is made possible by an absence of certain symmetry elements in a crystal structure; specifically, symmetry under time reversal forbids the property.

The first experimental observation of piezomagnetism was made in 1960, in the fluorides of cobalt and manganese.

The strongest piezomagnet known is uranium dioxide, with magnetoelastic memory switching at magnetic fields near 180,000 Oe at temperatures below 30 kelvins.

References

Magnetic ordering
 Transducers
Airtech Canada. 
Airtech Canada is a Canadian aerospace engineering firm established at the Peterborough Airport, Ontario in 1977. It specializes in modifying aircraft for a variety of roles, particularly aero-medical conversions. It has also marketed conversions for popular radial-engined transport aircraft such as the Douglas DC-3, de Havilland Canada DHC-2 Beaver and de Havilland Canada DHC-3 Otter.

References
 
 Company website

Aircraft manufacturers of Canada
Vehicle manufacturing companies established in 1977
1977 establishments in Ontario
St Vincent's Works. The St Vincent's Works is a former factory and offices at Silverthorne Lane in Bristol, England.

The building was built as offices and factory by Thomas Royse Lysaght, for his brother John Lysaght of John Lysaght and Co. with the buildings being completed by R Milverton Drake. The site was previously owned by Acraman and Company and was involved in the manufacture of corrugated-iron and pre-fabricated buildings, which were exported around the world and particular to settlers in Australia. By 1878 the factory employed 400 men and produced 1000 tons of galvanised iron sheet a month.  The company also diversified into making constructional ironwork, exported around the world from Bristol.

The building was home to the head office of renewable energy consultancy GL Garrad Hassan.

It is an example of the Bristol Byzantine style and various of the buildings have Grade II listed building status.

The company offices are Grade II* listed. The offices were built in a Gothic style with a domed atrium decorated with golden Doulton tiles. The offices have wood panelling and throughout the building are elaborate decorations.

In January 2018, the building was leased by Colliers International on behalf of a private landlord to the newly founded film production company, Screenology. The building is now under a ten-year contract with Screenology.

See also
 Grade II* listed buildings in Bristol

References

Industrial buildings in England
Industrial buildings completed in 1891
Office buildings completed in 1891
Grade II* listed buildings in Bristol
Grade II* listed industrial buildings
Byzantine Revival architecture in the United Kingdom
Control-flow analysis. In computer science, control-flow analysis (CFA) is a static-code-analysis technique for determining the control flow of a program. The control flow is expressed as a control-flow graph (CFG). For both functional programming languages and object-oriented programming languages, the term CFA, and elaborations such as k-CFA, refer to specific algorithms that compute control flow.

For many imperative programming languages, the control flow of a program is explicit in a program's source code.  As a result, interprocedural control-flow analysis implicitly usually refers to a static analysis technique for determining the receivers of function or method calls in computer programs written in a higher-order programming language. For example, in a programming language with higher-order functions like Scheme, the target of a function call may not be explicit: in the isolated expression

(lambda (f) (f x))

it is unclear to which procedure f may refer.  A control-flow analysis must consider where this expression could be invoked and what argument it may receive to determine the possible targets.

Techniques such as abstract interpretation, constraint solving, and type systems may be used for control-flow analysis.

See also
 Control-flow diagram (CFD)
 Data-flow analysis
 Cartesian product algorithm
 Pointer analysis

References

External links

for textbook intraprocedural CFA in imperative languages
CFA in functional programs (survey)
for the relationship between CFA analysis in functional languages and points-to analysis in imperative/OOP languages
Armstrong Whitworth Awana. The Armstrong Whitworth Awana was a British prototype troop-transport aircraft built to meet a 1920 Air Ministry requirement.

Design and development
The Awana was designed in response to Air Ministry Specification 5/20 for a twin-engined Troop Carrying Aeroplane, able to carry 25 fully equipped troops for a distance of 400 miles. Any design was to be capable of landing on rough terrain, other requirements being folding wings and the ability to fly on one engine.

One of the largest landplanes of its time, it was a large, twin-engine four-bay staggered biplane with a box-like fuselage, and a three-rudder, biplane tail. The pilot and navigator sat in open cockpits atop the nose, while the 25 troops it was to carry entered through a hatch in the floor and sat in two rows of "bus"-style seats with a centre aisle. It was of composite construction, with a tubular-steel-framed fuselage and wooden wings incorporating substantial hinges to allow them to be folded for storage. The Napier Lion engines were supported on tubular-steel supports between the wings and housed in streamlined cowlings with retractable radiators on the underside. The three cylindrical main petrol tanks were slung under the floor in an aluminium fairing, and fed fuel via windmill-driven pumps to header tanks on the underside of the upper wing.

Two prototypes were ordered by the Air Ministry on 27 June 1921, and the first prototype, serial number J6897, first flew on 28 June 1923. Evaluated at Martlesham Heath, control during landing was found to be poor, and the structure overall too flimsy. The second prototype addressed some of these concerns, but the Vickers Victoria was selected for production instead.

Specifications

See also

References

Notes

Bibliography

 

  
 
 

Awana
1920s British military transport aircraft
Cancelled military aircraft projects of the United Kingdom
Biplanes
Aircraft first flown in 1923
Twin piston-engined tractor aircraft
Page attribute table. The page attribute table (PAT) is a processor supplementary capability extension to the page table format of certain x86 and x86-64 microprocessors.  Like memory type range registers (MTRRs), they allow for fine-grained control over how areas of memory are cached, and are a companion feature to the MTRRs.

Unlike MTRRs, which provide the ability to manipulate the behavior of caching for a limited number of fixed physical address ranges, Page Attribute Tables allow for such behavior to be specified on a per-page basis, greatly increasing the ability of the operating system to select the most efficient behavior for any given task.

Processors 
The PAT is available on Pentium III and newer CPUs, and on non-Intel CPUs.

See also 
 Write-combining

References

External links 
 Intel 64 and IA-32 Architectures Software Developer's Manual Volume 3A: System Programming Guide, Part 1 see chapter 11, section 12.

Virtual memory
X86 architecture
Autonetics Recomp II. The Autonetics RECOMP II was a computer first introduced in 1958. It was made by the Autonetics division of North American Aviation. 

It was attached to a desk that housed the input/output devices. Its desk integration made it a hands-on small system intended for the scientific and engineering computing market. The computer weighed about  alone, and  including input-output.

Architecture
It had a 40-bit word size, 20-bit instruction size. Memory and registers were on a fixed head disk that operated like a drum memory—4080 words on standard tracks, 16 words on fast loop tracks, registers A, B, R, X each on their own high-speed loop track, and one prerecorded read only clock track.

It had a complete set of built-in floating point operations, including square root. Floating-point values used two words, one for the exponent and one for the fraction for a total of 80 bits.

Whereas the full 40-bit word was used for data, instructions were only 20 bits long and were stored two per word.  Since indexing was commonly done by modifying the address part of an instruction (say, by adding one to access the next data item in a list), such instructions always had to be in the second half-word, and the first half-word was padded with a NOP instruction.  Programmers also used these NOP instructions to provide space for future inserted instructions, since the assembler did not allow for use of symbolic addresses, and the insertion of a single instruction could otherwise require rewriting a lot of code.

The machine had a bit-serial architecture.

Punched paper tape was the external storage medium.  The desk also had an electronic typewriter for printed output and a keyboard integrated with the system console to allow typed input and system control.  Programs written in machine code could be input to the system from the console.

References

Further reading

External links
 Autonetics RECOMP II documents On Bitsavers.org

Early computers
Computer-related introductions in 1958
Breda Ba.25. The Breda Ba.25 was an Italian two-seat biplane trainer designed and built by the Breda company. It was the most widely used Italian basic trainer of the 1930s.

Design and development
The first flight took place near Milan in 1931. Initially designed as a single-seat aircraft, the prototype was later converted to a two-seat fuselage. Flight testing of the two-seat variant was successful, and in late 1931 Regia Aeronautica ordered a series of 100 Ba.25 training aircraft. The student and instructor sat in open tandem cockpits, although some versions had a single-bay cockpit.

The initial production order was completed by 1935, but demand for the aircraft increased and production for the Regia Aeronautica totalled 719 by the end of 1938. Many others were produced for export or for private use with different radial engines like the Alfa Romeo Lynx or Walter Castor.

Operational history
The Ba.25 remained in service of the Regia Aeronautica as a training aircraft during World War II. Some of the aircraft were seized and handed over to the Allies. Paraguay bought four Breda Ba.25, one of them a Ba.25Idro. They were used as primary trainers from 1939 to 1945.

Variants

There were many minor variants:
Ba.25
Main production version.
Ba.25/Lynx
Fitted with a 149 kW (200 hp) Alfa Romeo Lynx engine.
Ba.25/D.2
Fitted with a 179 kW (240 hp) Alfa Romeo D2 engine.
Ba.25/Mezzo-Asso
Fitted with a 164 kW (220 hp) Isotta Fraschini Asso 200 engine.
Ba.25 Ridotto'''
Reduced-span aerobatic version.
Ba.25-I (I for Idro)
Floatplane version (42 built, one for Paraguayan Naval Aviation)
Ba.26
Primary trainer with a longer wingspan and Walter NZ 120 engine, prototype only.
Ba.28
Export version with Piaggio-built Gnome-Rhône 7K engine for Norway, China and Ethiopia, among others.
The Ba.28 training aircraft was developed from the earlier Ba.25. It was also a biplane with a new, more powerful Piaggio Stella P.VII Z radial engine of  and had ailerons on the upper wing. In June 1936 the prototype was shown at the air show in Venice. The Italian Air Force in the same year ordered a series of 50 aircraft. During use in flight schools the Ba.28 proved not to be among the best – it was difficult to manage in the air. However, orders for the type arrived from abroad – were duly delivered to the following countries: Afghanistan (2), China (18), Norway (6), Austria (12) and Spain (6).

Operators

Afghan Air Force

Austrian Air Force (1927-1938)

Bolivian Air Force operated 6 aircraft (1939)

Republic of China Air Force

Ecuadorian Air Force

Ethiopian Air Force

Royal Hungarian Air Force operated 3 aircraftRegia AeronauticaAviazione Legionaria
Italian Co-Belligerent Air ForceAeronautica Nazionale Repubblicana''

Royal Norwegian Navy Air Service

Paraguayan Military Aviation used three Ba.25.
Paraguayan Naval Aviation used one Ba.25 Idro.

Spanish Air Force

Specifications (Ba.25)

See also

Notes

References

External links

Ba.25 entry at the Уголок неба website (Russian)

Ba.025
1930s Italian military trainer aircraft
Single-engined tractor aircraft
Biplanes
Aircraft first flown in 1931
Vinyl fluoride. Vinyl fluoride is an organic halide with the chemical formula C2H3F. It is a colorless gas with a faint ether-like odor. It is used as the monomeric precursor to the fluoropolymer polyvinylfluoride.

Production
It was first prepared in 1901 by Frédéric Swarts, the Belgian chemist who was the first to prepare chlorofluorocarbons in 1892.  Swarts used the reaction of zinc with 1,1-difluoro-2-bromoethane. It is produced industrially by two routes, one being the mercury-catalyzed reaction of acetylene and hydrogen fluoride:
HC≡CH  +  HF   →   CH2=CHF
It is also prepared from 1,1-chlorofluoroethane:
CH3CHClF  →   CH2=CHF  +  HCl

Safety
Vinyl fluoride is classified as an IARC Group 2A carcinogen (likely to cause cancer in humans).

Additional data
Its critical point is at 54.8 °C (328 K) and 5.24 MPa. Its molecular dipole moment is 1.4 Debye and heat of vaporization is 361 kJ/kg.

See also 
 Polyvinyl fluoride
 Vinyl chloride
 Vinyl bromide

References

External links 
 US Occupational Safety and Health Administration data sheet
CDC - NIOSH Pocket Guide to Chemical Hazards
 Vinyl fluoride data sheet, EnvironmentalChemistry.com
 Vinyl fluoride data sheet, airliquide.com 
MSDS Safety data at inchem.org
Information about its carcinogenity

Fluoroalkenes
Refrigerants
IARC Group 2A carcinogens
Vinyl compounds
Hydrofluoroolefins
System (disambiguation). A system is a set of entities, real or abstract, comprising a whole.

System may also refer to:

Science and technology
 Biological system, a complex network of biological entities, for instance, a group of organs
 Ecosystem, an entity comprising a large number of organisms and their environment
 Energy system, an interpretation of the energy sector in system terms
 Binary system (disambiguation), term is used for multiple purposes, such as:
 Binary system (astronomy), a system of two celestial bodies on a mutual orbit
 Star or stellar system, is a system of any multiple number of stars
 Planetary system, gravitationally bound non-stellar objects in or out of orbit around a star or star system
 Satellite system (astronomy), is a set of gravitationally bound non-planetary objects in orbit of a planetary mass object or minor planet, or its barycenter
 Ring system, is a system of cosmic dust or moonlets, forming rings around, and gravitationally bound to a host non-stellar body.
 Physical system, that portion of the physical universe chosen for analysis
 Thermodynamic system, a body of matter and/or radiation, confined in space by walls, with defined permeabilities, which separate it from its surroundings
 Systems science, an interdisciplinary field that studies the nature of complex systems in nature, society, and science
 System (stratigraphy), a unit of the geologic record of a rock column
 Systems engineering, a field about design, integration, and management of complex systems
 System of equations, a set of mathematical equations

Computing
 Computer system, the combination of hardware and software which forms a complete, working computer
 Operating system
 system, a C process control function in the C Standard Library used to execute subprocesses and commands
 System (typeface), a raster font packaged with Microsoft Windows

Social science
 Economic system, covering the production and distribution of goods and services
 Social system, based on the interrelationships between individuals, groups, and institutions

Music
 System (music notation), a collection of staves to be played simultaneously
 System (Seal album), a 2007 album by Seal
 "System", a song by Chester Bennington from the Queen of the Damned soundtrack
 "System", a song by Jonathan Davis on his 2007 album Alone I Play
 "System", a song by Labelle on their 2008 album Back to Now
 "System", a song by Reks on his 2009 album More Grey Hairs
 System, a Danish electronic trio consisting of Anders Remmer, Jesper Skaaning, and Thomas Knak
 System of a Down, an Armenian-American heavy metal band also known as "System"

Other uses
 System (journal), a scientific journal
 System (magazine)
 When talking about plurality or multiplicity, "system" can be used to refer to all personas (or "headmates") present in a single body, taken together as a group.

See also
 Classic Mac OS versions 1 through 7 were known as "System 1" through "System 7"
 Meta-system, something composed of multiple smaller systems
 The System (disambiguation)
 Systematics (disambiguation)
 Systema (disambiguation)
 List of systems
 Government
 Law
 Bureaucracy
Ternium. Ternium S.A. is a manufacturer of flat and long steel products with production centers in Argentina, Brazil, Mexico, Guatemala, Colombia, and the United States. Ternium owns a 51.5% interest in Usiminas of Brazil. The company has an annual production capacity of 15.4 million tons. In 2023, 55% of its sales were from Mexico; 21% of sales were from Argentina; Bolivia, Chile, Paraguay and Uruguay; 13% of sales were from Brazil; and 11% of sales were from the United States, Colombia and Central America.

Approximately 21% of the company is publicly-traded; the remainder is controlled by San Faustin S.A., which is in turn controlled by Rocca & Partners Stichting Administratiekantoor Aandelen San Faustin, a Stichting.

The company takes its name from the Latin words Ter (three) and Eternium (eternal) in reference to the integration of the three steel mills.

History
Ternium was formed in 2005 by the consolidation of three companies: Siderar of Argentina, Sidor of Venezuela and Hylsa of Mexico.

In 2006, Ternium was listed on the New York Stock Exchange.

In 2007, Ternium acquired Grupo IMSA, expanding its operations into Guatemala and the United States.

In April 2008, after a series of worker disputes over pay which led to strike actions, Sidor was nationalized by the government of Venezuela. In May 2009, compensation of US$1.65 billion was paid for Ternium's 59.7% stake in Sidor.

In August 2010, Ternium acquired a 54% interest in Ferrasa, and in April 2015, Ternium acquired the remainder of the company, which was renamed Ternium Colombia.

In 2017, Ternium acquired CSA Siderúrgica do Atlântico for €1.4 billion and renamed it Ternium Brazil.

In July 2023, Ternium increased its ownership in Usiminas to 51.5%.

References

External links
 

Companies based in Luxembourg City
Companies listed on the Buenos Aires Stock Exchange
Companies listed on the New York Stock Exchange
Iron and steel mills
Luxembourgian companies established in 2005
Manufacturing companies established in 2005
Manufacturing companies of Argentina
Manufacturing companies of Mexico
Steel companies of Luxembourg
Techint