omniomni/omni-engineering huggingface dataset:
Aheylite. Aheylite is a rare phosphate mineral with formula (Fe2+Zn)Al6[(OH)4|(PO4)2]2·4(H2O). It occurs as pale blue to pale green triclinic crystal masses.  Aheylite was made the newest member of the turquoise group in 1984 by International Mineralogical Association Commission on New Minerals and Mineral Names.

Composition
The turquoise group has a basic formula of A0–1B6(PO4)4−x(PO3OH)x(OH)8·4H2O. This group contains five other minerals. In addition to aheylite: planerite, turquoise, faustite, chalcosiderite, and an unnamed Fe2+-Fe3+ analogue.  Aheylite is distinguished in this group by having Fe2+ dominant in the A-site. The ideal aheylite has a formula of Fe2+Al6(PO4)4(OH)8·4H2O. Its color is pale blue or green. With turquoise family the blue color is said to come from the octahedral coordination of Cu2+ in the absence of Fe3+.

Name and discovery
It was first described for an occurrence in the Huanuni mine, Huanuni, Oruro Department, Bolivia, and named for Allen V. Heyl (1918–2008), an economic geologist for the United States Geological Survey. It was discovered by Eugene Foord and Joseph Taggart.

Occurrence
In addition to the type locality in Bolivia it has been reported from the Bali Lo prospect in the Capricorn Range, Western Australia and the Les Montmins Mine, Auvergne, France.
It is a turquoise group mineral and occurs as a late hydrothermal phase in a tin deposit associated with variscite, vivianite, wavellite, cassiterite, sphalerite, pyrite and quartz in the type locality.

Physical properties
It is found as an isolated mass of hemispheres and spheres clumped together. It has a vitreous to dull luster. It has a hackly to splintery fracture and it has a brittle tenacity. The hardness is about 5–5.5, and the specific gravity is 2.84. As far as optical properties, it had thin flakes; ipale blue, green to blue-green color; it streaks white, and has a subvitreous luster.

References 

Phosphate minerals
Triclinic minerals
Mxwendler. MXWendler is a software system created by the German company device+context.

The software is intended to create live visuals, commonly used in clubs, music festivals, theatres, facade projections and arts events.

The software renders live video using common graphics hardware instead of using the CPU. The company's website claims this makes the software 'very fast'. Another aspect is the "generative aspect"' of the software: it has a built-in feedback loop which allows it to generate new videostreams by using the feedback characteristics as proposed by VJs like mxzehn instead of solely relying on triggered prepared footage clips.

See also
 Video performance artist

External links
company homepage
mxzehn

Multimedia software
Silver oxalate. Silver oxalate () is a silver salt of oxalic acid commonly employed in experimental petrology to add carbon dioxide () to experiments as it will break down to silver (Ag) and carbon dioxide under geologic conditions.  It is also a precursor to the production of silver nanoparticles.
It is explosive upon heating around 140 degrees Celsius, shock or friction.

Production
Silver oxalate is produced by the reaction between silver nitrate and oxalic acid.

See also
 Dioxane tetraketone

References

External links
 Synthesizing Silver Oxalate
 Chemical Entity Data Page

Silver compounds
Oxalates
Plasma wave instrument. A plasma wave instrument (PWI), also known as a plasma wave receiver, is a device capable of detecting vibrations in outer space plasma and transforming them into audible sound waves or air vibrations that can be heard by the human ear. This instrument was pioneered by then-University of Iowa physics professor, Donald Gurnett. Plasma wave instruments are commonly employed on space probes such as GEOTAIL, Polar, Voyager I and II (see Plasma Wave Subsystem), and Cassini–Huygens.

Operating principle 
Vibrations in the audible frequency range are perceived by humans when air vibrates against their eardrum. Air, or some other vibrating medium such as water, is essential for sound perception by the human ear. Without a medium to transmit it, the sound produced by a source will not be heard by a human. There is no air in outer space, nor is there any other type of medium capable of transmitting vibrations from a source to a human ear. However, there are sources in outer space that vibrate at frequencies audible to humans if only there were some transmitting medium to carry those vibrations from the source to a human eardrum.

One such source capable of vibrating at audible frequencies (ranging from 45 to 20,000 vibrations per second) is plasma. Plasma is a collection of charged particles, such as free electrons or ionized gas atoms. Examples of plasma include solar flares, solar wind, neon signs, and fluorescent lamps. Plasma interacts with electrical and magnetic fields in ways that can result in vibrations across various frequencies, including the audible range.

Other applications 
The recordings of interplanetary and outer space plasma vibrations, captured by plasma wave instruments, were provided by NASA to composer Terry Riley and Kronos quartet founder David Harrington as inspiration for the composition of "Sun Rings", a 85-minute multimedia piece for a string quartet and choir. "Sun Rings" was performed November 3, 2006, at the Veteran's Auditorium, in Providence, Rhode Island.

References

Plasma diagnostics
Remote sensing
Spacecraft instruments
Translational partition function. In statistical mechanics, the translational partition function,  is that part of the partition function resulting from the movement (translation) of the center of mass. For a single atom or molecule in a low pressure gas,  neglecting the interactions of molecules, the canonical ensemble  can be approximated by:

 where  

Here, V is the volume of the container holding the molecule (volume per single molecule so, e.g., for 1 mole of gas the container volume should be divided by the Avogadro number), Λ is the Thermal de Broglie wavelength, h is the Planck constant, m is the mass of a molecule, kB is the Boltzmann constant and T is the absolute temperature.
This approximation is valid as long as Λ is much less than any dimension of the volume the atom or molecule is in.  Since  typical values of Λ are on the order of 10-100 pm, this is almost always an excellent approximation. 

When considering a set of N non-interacting but identical atoms or molecules, when QT ≫ N , or equivalently when ρ Λ ≪ 1 where ρ is the density of particles, the total translational partition function can be written

The factor of N! arises from the restriction of allowed N particle states due to  Quantum exchange symmetry.
Most substances form liquids or solids at temperatures much higher than when this approximation breaks down significantly.

See also
 Rotational partition function
 Vibrational partition function
 Partition function (mathematics)

References

Partition functions
B24. B24 or B-24 may refer to:
 Consolidated B-24 Liberator, an American World War II heavy bomber
 Autovia B-24, a highway in Catalonia, Spain connecting Barcelona to the towns of Penedès
 Blackburn B-24, a 1937 carrier-based aircraft
 B24 Sierra, a single-engined aircraft in the Beechcraft Musketeer family

See also
A model of the Lancia Aurelia car
STARSHINE (satellite). The STARSHINE (Student Tracked Atmospheric Research Satellite Heuristic International Networking Experiment) series of three (later, a fourth one was also launched) artificial satellites were student participatory missions sponsored by the United States Naval Research Laboratory (the fourth STARSHINE was a NASA mission).

Satellites
The STARSHINE launches were considered launches of opportunity.

STARSHINE 1 

STARSHINE 1 was a spherical satellite that was fitted with almost nine hundred small mirrors polished by students from around the world. It was launched June 5, 1999 from the Space Shuttle Discovery on STS-96. 

Once launched, a network of over 20,000 students from eighteen countries tracked the satellite by observing sunlight glinting off the mirrors and networked their observations via the Internet. The students used these observations to calculate air drag, solar activity, and other orbit related properties of the satellite.

STARSHINE 1 re-entered and burned up in the Earth's upper atmosphere on February 18, 2000.

STARSHINE 2 
STARSHINE 2 and 3 had systems added to impart spin to these satellites in an effort to improve the solar-reflected flash rate, as well as a number of laser retroreflectors to introduce the students to satellite laser ranging. The satellites were constructed largely from spare flight hardware.

STARSHINE 2 launched December 5, 2001 from the Space Shuttle Endeavour on STS-108. It re-entered and burned up in the Earth's upper atmosphere on April 26, 2002.

STARSHINE 3 

STARSHINE 3 has the same systems as role as STARSHINE-2. It was launched on September 29, 2001 as part of the Kodiak Star Athena I mission.

In November 2001, the amateur radio payload on Starshine 3 was designated STARSHINE-OSCAR-43, or SO-43. STARSHINE-3 re-entered and burned up in the Earth's upper atmosphere on January 21, 2003. It had made 7434 revolutions around the Earth since its launch.

STARSHINE 4 
A further fourth satellite, STARSHINE 4, was launched aboard the maiden flight of Virgin Orbit's LauncherOne rocket on 25 May 2020. The launch vehicle failed five seconds after deployment from the carrier aircraft and the satellite did not reach orbit.

See also
 LAGEOS (Laser Geodynamics Satellites)—a series of scientific research satellites designed to provide an orbiting laser ranging benchmark for geodynamical studies of the Earth
Etalon (satellite)
 Satellite laser ranging

References

External sources
Starshine project website
 Space Sciences: The Navy & Satellites - Starshine 2
 Space Sciences: The Navy & Satellites - Starshine 3

Satellites orbiting Earth
Educational projects
Laser ranging satellites
Amateur radio satellites
Satellite series
Preferential alignment. The preferential alignment is a criterion of an orientation of a molecule or atom. The preferential alignment can be related to the formation of the crystal structure of an amorphous structure.

Polymeric masses with high atomic distances can either be in an oriented or non oriented state. These higher distances (up to 1000 Å) form great regions, where the molecular chains may be preferentially oriented, something which can happen independent to the existence or not of crystallinity.

References

Crystallography
Non-contact force. A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar non-contact force is gravity, which confers weight. In contrast, a contact force is a force which acts on an object coming physically in contact with it.

All four known fundamental interactions are non-contact forces:

 Gravity, the force of attraction that exists among all bodies that have mass. The force exerted on each body by the other through weight is proportional to the mass of the first body times the mass of the second body divided by the square of the distance between them.
 Electromagnetism is the force that causes the interaction between electrically charged particles; the areas in which this happens are called electromagnetic fields. Examples of this force include: electricity, magnetism, radio waves, microwaves, infrared, visible light, X-rays and gamma rays. Electromagnetism mediates all chemical, biological, electrical and electronic processes.
 Strong nuclear force: Unlike gravity and electromagnetism, the strong nuclear force is a short distance force that takes place between fundamental particles within a nucleus. It is charge independent and acts equally between a proton and a proton, a neutron and a neutron, and a proton and a neutron. The strong nuclear force is the strongest force in nature; however, its range is small (acting only over distances of the order of 10−15 m). The strong nuclear force mediates both nuclear fission and fusion reactions.
 Weak nuclear force: The weak nuclear force mediates the β decay of a neutron, in which the neutron decays into a proton and in the process emits a β particle and an uncharged particle called a neutrino. As a result of mediating the β decay process, the weak nuclear force plays a key role in supernovas. Both the strong and weak forces form an important part of quantum mechanics.The Casimir effect could also be thought of as a non-contact force.

See also 
Tension
Body force
Surface force
Action at a distance

References 

Concepts in physics
Force
Wright Electrocity. The Wright Electrocity was a type of hybrid electric bus built by Wrightbus between 2002 and 2013. The Electrocity was based on DAF/VDL SB120 chassis for most of these buses, except for a single Dennis Dart SLF prototype.

History
Two Electrocity prototypes were initially built in 2002; one based on DAF SB120 chassis, the other based on a Dennis Dart SLF chassis. The bodywork design was similar to the existing Wright Cadet and Crusader, which were also built on DAF SB120 and Dennis Dart SLF chassis respectively, with the addition of battery pods on the roof of the Electrocity being the main difference. The Electrocity was the first bus of its kind to be built, and the prototypes competed mainly with the TransBus Enviro200H.

The Electrocity design was facelifted in 2005 to match the updated Cadet design, with the main noticeable change being rounded front headlights. Following the collapse of TransBus International in 2004 and subsequent cancellation of the Enviro200H programme, in February 2006 London Central placed six Electrocitys based on VDL SB120 chassis into service on route 360.

Originally equipped with lead-acid batteries and 1.9 litre Vauxhall engines, in 2011 all were rebuilt by Wrightbus with  lithium-ion batteries and 4.5 litre Cummins ISBe engines. The hybrid management system was converted from Enova to Siemens. Externally they received larger white pods on the rear roofs to house the batteries.

All subsequent Electrocitys were built on VDL SB120 chassis. In 2007, another five were built for Travel London for use on route 129. A single Electrocity was built for London Central in 2008, followed by a batch of six in 2011, to allow for a full conversion of route 360.

The Electrocity was superseded by the Wright StreetAir in 2016.

References

External links

Wrightbus Electrocity Wrightbus

Hybrid electric buses
Low-entry buses
Vehicles introduced in 2002
Electrocity
Iranian Offshore Engineering and Construction Company. Iranian Offshore Engineering and Construction Company (IOEC) is the first Iranian general contractor in the oil and gas industries. IOEC specializes in offshore EPC project. The company was established in 1991 and operates mainly in the Persian Gulf, with its head office in Tehran.

IOEC designs, procures, constructs, installs and provides services for a range of offshore surface and partial subsurface infrastructure for the offshore oil and gas industries. IOEC is one of the largest integrated offshore and sub-sea pipe-laying companies in the Middle East. Iran is going to be self-sufficient in drilling of offshore wells up to certain depths (2009).

The company aims to extend its oil and gas activities in both onshore and offshore fields. In addition to mid-stream activities, IOEC intends to develop its up-stream operations. Development of the vessels and localizing the construction technology of drilling rigs include other objectives of this company. In 2016, IOEC stated that it will participate in projects in Europe and Africa.

See also
Petroleum industry in Iran
Industry of Iran

References

External links
 IOEC website 

Construction and civil engineering companies of Iran
Oilfield services companies
Petroleum industry in Iran
Iranian entities subject to U.S. Department of the Treasury sanctions
Profile (UML). A profile in the Unified Modeling Language (UML) provides a generic extension mechanism for customizing UML models for particular domains and platforms. Extension mechanisms allow refining standard semantics in strictly additive manner, preventing them from contradicting standard semantics.

Profiles are defined using stereotypes, tag definitions, and constraints which are applied to specific model elements, like Classes, Attributes, Operations, and Activities. A Profile is a collection of such extensions that collectively customize UML for a particular domain (e.g., aerospace, healthcare, financial) or platform (J2EE, .NET).

Examples
The UML Profile for XML is defined by David Carlson in the book "Modeling XML Applications with UML" pp. 310 and describes a set of extensions to basic UML model elements to enable accurate modeling of XSD schemas. 

SysML is an Object Management Group (OMG)-standardized profile of Unified Modeling Language which is used for system engineering applications.

MARTE is the OMG standard for modelling real-time and embedded applications with UML2.

The UML profile for relationships  (see also ) is based on RM-ODP and provides precise specifications of the semantics of UML concepts used to specify generic (not necessarily binary) relationships such as composition and subtyping.

See also
 Stereotype (UML)

Footnotes

References

External links
 UML 2 Profile

Unified Modeling Language
Systems Modeling Language
Epson Micro Flying Robot. The Micro Flying Robot (μFR) is the world’s smallest and lightest robot helicopter prototype, which was developed by Epson and demonstrated at the International Robot Exhibition in Tokyo in November 2003. The purpose of its development was to demonstrate its micro-mechatronics technology and to explore the possible use of micro robots and the development of component technology applications.

Features and capabilities
The μFR is levitated by contra-rotating propellers powered by four 7x2x1-mm ultrasonic motors (originally developed for wristwatches) and is balanced in mid-air by means of a stabilizing mechanism that uses a linear actuator. Though the μFR is radio-controlled, it relies on power from an external battery via a power cable and thus its flying range is limited. The μFR includes two microprocessors, a bluetooth module, a gyro-sensor, an accelerometer and an image sensor.

Development of μFR-II
The μFR-II is the enhanced version of the μFR. It was developed in 2004 for full wireless operation paired with independent flight capability. The main challenge was the need to combine lighter weight with greater dynamic lift. Epson made the robot lighter by developing a new gyro-sensor that is one-fifth the weight of its predecessor. Dynamic lift was boosted 30% by the introduction of more powerful ultra-thin ultrasonic motors and newly designed, optimally shaped main rotors. The μFR-II includes two 32-bit RISC microcontrollers, an on-board lithium polymer battery, as well as an image sensor that can capture and transmit images via Bluetooth wireless connection. At the moment it has a flight time of just 3 minutes.

Specifications

Possible applications
Security and surveillance
Disaster rescue
Space exploration

References

External links 
 μFR Epson News Release in November 2003 (archived)
 μFR-II Epson News Release in August 2004 (archived)
 Micro Flying Robotics in Space Missions
 BBC News article on the μFR-II

Miniature helicopters
Unmanned aerial vehicles of Japan
Micro Flying Robot
2003 robots
Aerobots
Quantegy. Quantegy Inc. was a manufacturer of magnetic tape and professional external hard drives based in Opelika, Alabama. Their tape products were primarily used in analog audio and video recording studios, but they also have some use with digital data storage devices and instrumentation recorders along with some audiophile home hobbyists.

The company was created at the end of World War II by Major John Herbert Orr as Orradio Industries. This was a result of the US Army requiring an American supplier of magnetic tape. Magnetic tape was a German invention and after the war, the German manufacturing ability was destroyed.

 In 1959, Ampex acquired Orradio Industries and it became the Ampex Magnetic Tape Division.
 In 1995, Ampex divested this division, then called the Ampex Recording Media Corporation. At the same time, 3M was also spinning off its magnetic media division. Equitable Life Insurance acquired these combined entities, which became Quantegy Inc., and later changed its name to the current Quantegy Recording Solutions, with the Ampex product line being the nominal survivor, although much use of the 3M technologies later found their way into Quantegy products including the high end GP9 tape.
 In January 2005, having previously filed for bankruptcy protection, Quantegy closed its manufacturing facility in Opelika. This event received substantial media attention.
 On April 18, 2005, Quantegy resumed operations under new ownership.
 In January 2007, Quantegy announced that it will cease production of magnetic tape in April 2007 and is taking orders up until February 22. The only remaining manufacturers of new magnetic tape for sound recording were RMGI and ATR Magnetics.
 In April 2007, Reel Deal Pro Audio purchased the majority of Quantegy's reel-to-reel audio tape and accessories and began to sell it on their web site.
 In June 2007, Quantegy ceased sales of the FHD and Black Diamond FHD3 series of hard drive products to the professional audio recording industry.
 Most of the tape production facilities, located in Opelika, Alabama, were sold in 2008.
 In 2009, Quantegy began working on reviving Quantegy 456 Studio Mastering Tape, Quantegy 499 Gold Studio Mastering Tape, GP9 Platinum Studio Mastering Tape, as well as the Black Diamond Series of products. But , no progress had been made.

See also 
 Audio tape specifications
 Reel-to-reel audio tape recording
 Videotape

References

External links 
 Corporate Homepage - From Internet Archive (Warning: mostly FLASH)
 Quantegy History Page
 NPR story on 2005 plant closing/bankruptcy
 Rolling Stone story on 2005 plant closing/bankruptcy
 More info on new ownership
 An old advertisement for Irish brand ferro-sheen tape.
 Reel Deal Offers Last Quantegy Tapes

Video storage
Audio storage
Defunct computer companies of the United States
Defunct computer hardware companies
Defunct manufacturing companies based in Alabama