omniomni/omni-engineering huggingface dataset:
2,6-Dimethylnaphthalene. 2,6-Dimethylnaphthalene (2,6-DMN) is a polycyclic aromatic hydrocarbon. It is one of the ten dimethylnaphthalene isomers, which are derived from naphthalene by the addition of two methyl groups.

Synthesis
Alkylated naphthalenes (methyl-, dimethyl-, and poly-methyl naphthalenes, thus including 2,6-DMN) are found in low concentrations in crude oil and coal tar. Separation is difficult, expensive, and requires a number of operations such as selective crystallization and adsorption, in addition to any isomerization reactions. Alternative routes to 2,6-DMN remains of interest.

In the "alkenylation process" butadiene (1), o-xylene (2), and sodium-potassium alloy (3) are used, which react to form 5-(ortho-tolyl)pent-2-ene (OTP, 3). OTP is subsequently cyclized to 1,5-dimethyltetraline (4). Dehydrogenation then provides 1,5-dimethylnaphthalene (1,5-DMN, 5). Finally, 1,5-DMN is isomerized to 2,6-DMN (6). In the final step, other mono-, di-, and tri-methylnaphthalenes are formed. More work is therefore required in separation of the mixture, which is done by selective crystallization.

Applications
2,6-Dimethylnaphthalene is mainly used for the preparation of 2,6-naphthalenedicarboxylic acid by oxidation of 2,6-dimethylnaphthalene in the liquid phase. 2,6-Naphthalenedicarboxylic acid is a monomer for the production of high-performance polymers, in particular poly (ethylene-2,6-naphthalene dicarboxylate) or shorter polyethylene naphthalate (PEN). That polyester is stronger and has a higher thermal resistance than the more frequently used polyethylene terephthalate (PET).

2,6-Dimethylnaphthalene undergoes ammoxidation to give the 2,6-dicyanonaphthalene, which can be hydrogenated to bis(aminomethyl)naphthalene, a precursor to dyes.

References

Aromatic hydrocarbons
Naphthalenes
Sarabhai Institute of Science and Technology. The Sarabhai Institute of Science and Technology, commonly known as SIST, is in Thiruvananthapuram, the capital city of Kerala. It was founded in 2004.
The college is affiliated to KTU (APJ Abdul Kalam Technological University).

The Institution provides 4-year BTech Programmes in:
Civil Engineering, Computer Science & Engineering, Electrical &  Electronics Engineering, Electronics & Communication Engineering, Electronics & Instrumentation Engineering and Mechanical Engineering. 
All BTech Programmes have 60 seats.

There are 2-year Post Graduation Programmes (M. TECH) in:
Computer & Information Science, Software Engineering, Optoelectronics Engineering, Signal Processing, Thermal Engineering and Geotechnical Engineering.

All PG Programmes have 18 seats.

Engineering colleges in Thiruvananthapuram
Educational institutions established in 2004
2004 establishments in Kerala
Accommodation platform. An accommodation platform is an offshore platform which supports living quarters for offshore personnel. These are often associated with the petroleum industry, although other industries use them as well, such as the wind farm Horns Rev 2.

Definitions 
In the oil and gas industry an accommodation platform may be a flotel, providing living quarters for personnel temporarily engaged in construction or maintenance activities. It also refers to a permanent platform bridge-linked to production and wellhead platforms. It provides living quarters and a safe refuge remote from the potential hazards of the drilling and hydrocarbon plant.

Designation 
Accommodation platforms may be designated 'A' (Accommodation), 'LQ' (Living Quarters), 'Q' (Quarters), 'UQ' (Utility & Quarters). Only low hazard equipment and fluids are located on the accommodation platform to reduce the risk of fire or explosion.

Facilities 

Accommodation platforms may comprise:

 Sleeping quarters, ideally no more than two people per cabin with shower, toilet, washing and personal storage facilities
Galley for food preparation and serving
 Eating (mess) facilities
 Food storage: dry store, refrigeration and freezing facilities
 Waste handling and storage
Laundry facilities, washing and drying clothes and bedding
Sick bay and Qualified Medic
 Recreation facilities: cinema, quiet room, games, gym, sauna
 Installation control room, including telecommunications
 Crew offices: Offshore Installation Manager; Production team leader; Maintenance team leader, Drilling  team leader
 Boot/Locker room for changing between indoor and outdoor clothes, toilets, washing facilities
 Heating, Ventilation and Air Conditioning (HVAC) systems
Fire, smoke and gas detection systems
 Helideck
Lifeboats

Utility systems 
Low hazard utility systems may be located on the Accommodation platform
 Black-start and Emergency power generation
 Firewater (seawater lift) pump(s) and fire fighting facilities
 Instrument and plant air compression
 Potable water plant for making and storing drinking water
Aviation fuel storage and refueling for helicopter
 Sewage treatment and disposal
 Non-hazardous drains

Supply and disposal 
Consumable materials such as foodstuffs and potable water are delivered to the platform by supply boat, and are offloaded from the boat by platform mounted crane. The boat will also take waste material from the platform for recycling onshore.

See also
 Deep sea habitat

References

Petroleum production
Oil platforms
Jobaria Defense Systems Multiple Cradle Launcher. The Jobaria Defense Systems Multiple Cradle Launcher, also called Jahanam Launcher (), is an Emirati made multiple rocket launcher unique to the United Arab Emirates Army. It has 240 tubes making it the world's largest rocket artillery by tube count. It is thought to function as a combined form of BM-21 Grad multiple rocket launcher. It is developed by a joint venture Al Jaber Land Systems.

Design rationale 
The United Arab Emirates Army made a request for a rocket artillery battery to be mounted on one vehicle, since the army is using six vehicles, most likely BM-21 Grad, and 30 soldiers to do the same. Due to the small number of military personnel of the United Arab Emirates Army, the Multiple Cradle Launcher has an advantage over the use of six vehicles which require a team of 30 men, whereas the Multiple Cradle Launcher only needs a team of three to operate and launching the same number of rockets (240). It has four rocket launchers attached to the trailer each carrying sixty 122mm rockets. The system fires ROKETSAN 122mm T-122 Sakarya rockets fitted with a high-explosive warhead that can be detonated by using either a point detonating fuze or by a proximity fuze. The operator of the system can choose how many and which pods he fires. All rockets can be fired in under two minutes, making the rate of fire 2 rounds per second.

After launching the rockets the system can relocate and continue firing rockets if it had not launched its entire payload or if it had, then be rearmed by a support vehicle in about 30 minutes. The support vehicle has two cranes each reloading two pods of the system.

Variants 
ROKETSAN also developed a Rocket Launcher, which fires both 107mm and 122mm rockets from the same Launcher, making it a Multi-Calibre, Multiple Rocket Launcher.

In February 2017, Al Jaber unveiled its Jobaria TCL (Twin Cradle Launcher) heavy rocket artillery system.  Based on the Multiple Cradle Rocket Launcher, it fires 300 mm rockets from two four-rocket launchers; the system can fire either the Chinese A300 from  or the Turkish T-300 Kasirga (Tiger) from .  The TCL has a reduced trailer length of .

Operators

See also 
 T-300 Kasırga
 Katyusha, BM-13, BM-8, and BM-31 multiple rocket launchers of World War II
 BM-14 140 mm multiple rocket launcher
 BM-27 Uragan 220 mm multiple rocket launcher
 BM-30 Smerch 300 mm multiple rocket launcher
 ASTROS II

References 

Rocket artillery
Rocket launchers
Engineering (disambiguation). Engineering is a professional discipline.

Engineering may also refer to:
Engineering (magazine) (established 1866), weekly magazine
Engineering (constituency), an electoral constituency in Hong Kong
Engineering (journal) (established 2015), Chinese journal
Engineering (Scientific Research Publishing journal), predatory journal
"Engineering", a Series E episode of the television series QI (2007)

See also

Engineer (disambiguation)
List of engineering branches
Outline of engineering
Edgar Rock Lodge. The Edgar Rock Lodge is a rustic house in Yakima County, Washington. The house was used as a way station on the road over Chinook Pass to Bumping Lake. It was built by prospector Dick Darlington around 1904, who named the house after a nearby rock formation. When construction of Bumping Lake Dam started in 1901, Darlington worked as a cook on the dam project, and the lodge was used as one of several way stations for supplies that were brought to the remote dam site on horse and wagon. When the road was paved in 1916 the lodge continued to serve as a stopping point for travelers.

Description
The Edgar Rock Lodge is a unique example for vertical log construction, using  diameter logs set on end on a sill plate over a stone foundation.  The -story house measures about n by . The house is rectangular, with a porch the full length of the main elevation, covered by a shed roof extension. The logs extend halfway up the second floor, to the bottom of the attic windows. A single dormer is set in the center of the front roof elevation. The roof is asphalt roll roofing, seamed vertically along the slope of the roof rather than shingled along its length. The porch has square posts, but the railings are logs. The log walls are exposed on the interior, with sand and cement chinking. The interior features a stone fireplace, but is otherwise plain. A nearby root cellar is included in the complex.

The Edgar Rock Lodge was placed on the National Register of Historic Places on August 1, 1996.

References

Houses on the National Register of Historic Places in Washington (state)
Houses completed in 1904
Buildings and structures in Yakima County, Washington
Rustic architecture in Washington (state)
National Register of Historic Places in Yakima County, Washington
Panton Arms. The Panton Arms is a pub in Cambridge, U.K. that is often frequented by scientists from the Engineering and Chemistry Department of the University of Cambridge. It became more widely known in February 2010 when a group of scientists released the Panton Principles — a set of recommendations on how to license and label scientific data that have been made public — that they had drafted in the Panton Arms starting in June 2009.

The pub features a "white gingerbread building festooned with hanging baskets of petunias and nestled among rows of Victorian terraced houses" with black wrought iron gates. The atmosphere, service and the food at the pub have generated mixed reviews from online reviewers. It serves beer and there is adequate parking nearby. One reviewer described how it seemed "hidden in a residential area". It is the remaining corner and former tap room of a larger site, originally occupied by a brewery.

References

Pubs in Cambridge
Eurofly Viper. The Eurofly Viper is an Italian ultralight trike, designed and produced by Eurofly Srl of Galliera Veneta. The aircraft is supplied as a complete ready-to-fly-aircraft.

Design and development
The aircraft was designed to comply with the Fédération Aéronautique Internationale microlight category, including the category's maximum gross weight of . The Viper has a maximum gross weight of . It features a cable-braced hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit, tricycle landing gear with wheel pants and a single engine in pusher configuration.

The aircraft is made from welded tubing, with its double surface wing covered in Dacron sailcloth. Its  span Skyrider Hazard 12 wing is supported by a single tube-type kingpost and uses an "A" frame weight-shift control bar. The standard powerplant is a twin cylinder, liquid-cooled, two-stroke, dual-ignition  Rotax 582 engine, with the twin cylinder, air-cooled, two-stroke, dual-ignition  Rotax 503 engine optional. The Viper has an empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload is .

A number of different wings can be fitted to the basic carriage, including the Skyrider Hazard 12 and Hazard 15. A  fuel tank is optional.

A basic version of the aircraft, powered by the  Rotax 503 engine and without fairings is also offered.

Specifications (Viper with Hazard 12 wing)

References

External links

Viper
2000s Italian sport aircraft
2000s Italian ultralight aircraft
Single-engined pusher aircraft
Ultralight trikes
Meanings of minor-planet names: 217001–218000. 

217001–217100 

|-bgcolor=#f2f2f2
| colspan=4 align=center | 
|}

217101–217200 

|-id=124
| 217124 Michaelsalinas ||  || Michael J. Salinas (b. 1995), an American engineer at KinetX Aerospace. || 
|}

217201–217300 

|-id=257
| 217257 Valemangano ||  || Valeria Mangano (born 1971), a planetary scientist at the Istituto di Fisica dello Spazio Interplanetario in Torino. || 
|}

217301–217400 

|-id=366
| 217366 Mayalin ||  || Maya Lin (born 1959) designed the Vietnam Veterans Memorial in Washington, D.C. (1980–1982) and the Civil Rights Memorial (1988–1989) in Montgomery, Alabama, along with many other monuments and works of art. For a time, she created artificial "asteroids" out of her daughters' discarded toys. || 
|-id=398
| 217398 Tihany ||  || Tihany, a historic village on the northern shore of Lake Balaton on the Tihany Peninsula. || 
|}

217401–217500 

|-id=420
| 217420 Olevsk ||  || Olevsk, an ancient city founded in the times of Kievan Rus. || 
|-id=492
| 217492 Howardtaylor ||  || Howard W. Taylor (b. 1969) is an American electrical engineer from Johns Hopkins University Applied Physics Laboratory. || 
|}

217501–217600 

|-id=510
| 217510 Dewaldroode ||  || Dewald Roode (1940–2009), a South African physicist, mathematician and computer scientist. || 
|-id=576
| 217576 Klausbirkner ||  || Klaus Birkner (born 1959), a long-time amateur astronomer and co-founder of the AAEM Observatory near Velbert, Germany. || 
|}

217601–217700 

|-id=603
| 217603 Grove Creek ||  || Grove Creek Observatory, a professional research facility located at Trunkey Creek, New South Wales, Australia. || 
|-id=628
| 217628 Lugh ||  || Lugh (or Lugus), the Celtic God of the Sun and light. || 
|}

217701–217800 

|-id=726
| 217726 Kitabeppu || 1999 WN || Manabu Kitabeppu (born 1957), born in Kagoshima prefecture, is a retired Japanese baseball player who played for the Hiroshima Toyo Carp. Famous for excellent ball control, Kitabeppu got 213 wins and 1757 strikeouts during his nineteen-year career as a starting pitcher. || 
|}

217801–217900 

|-bgcolor=#f2f2f2
| colspan=4 align=center | 
|}

217901–218000 

|-bgcolor=#f2f2f2
| colspan=4 align=center | 
|}

References 

217001-218000
334th Fighter-Bomber Aviation Squadron. The 334th Fighter-Bomber Aviation Squadrons (Serbo-Croatian:  / 334. ловачко-бомбардерска авоијацијска ескадрила) was an aviation squadron of Yugoslav Air Force formed in 1978 at Mostar airfield as 3rd Fighter-Bomber Aviation Squadron of 107th Helicopter Regiment (Serbo-Croatian: / 3. ловачко-бомбардерска авоијацијска ескадрила 107. хеликоптерског пука).

History
The 3rd Fighter-Bomber Aviation Squadron of 107th Helicopter Regiment was equipped with domestic made G-2 Galeb trainer-light attack jet aircraft.

In 1979 the squadron has been transformed into 1st Fighter-Bomber Aviation Squadron of Center for training of foreign armed forces pilots (Serbo-Croatian:  / 1. ловачко-бомбардерска авоијацијска ескадрила Центра за обуку пилота припадника страних оружаних снага). Main task of squadron was training of Libyan Air Force pilots.

With the center being disbanded in 1988, squadron has been attached again to 107th Aviation Regiment and renamed in to 334th Fighter-Bomber Aviation Squadrons. 
Main task of 334th Squadron was training of reserve pilots, cadets of School of Reserve Officers.

In 1990 334th Fighter-Bomber Aviation Squadron ceased to exist due it was disbanded by "Jedinstvo 2" reorganization.

Assignments
107th Helicopter Regiment
Center for training of foreign armed forces pilots (1979-1988)
107th Aviation Regiment (1988-1990)

Previous designations
3rd Fighter-Bomber Aviation Squadron of 107th Helicopter Regiment (1978-1979)
1st Fighter-Bomber Aviation Squadron (1979–1988)
334th Fighter-Bomber Aviation Squadron (1987-1990)

Equipment
G-2 Galeb (1978-1990)

References

Yugoslav Air Force squadrons
Military units and formations established in 1978
Military units and formations disestablished in 1990
Mousa Refan. Mousa Refan () also known as Akbar Refan (), is an Iranian electrical engineer and former military officer.

In 2012 he was elected as the featured electrical engineer of Iran by Iran Academy of Science.

Early life and education 
Born in 1958 in Kazerun, Fars Province, Refan obtained his BS in electrical engineering from University of Tehran.

Military career 
Refan was one of the Muslim Student Followers of the Imam's Line taking over the U.S. embassy in 1979, who entered Islamic Revolutionary Guard Corps (IRGC) and reached at top of its command hierarchy. He was founder and the first commander of the IRGC's Air Force. Refan wanted to transform the military branch into a major aerial warfare force parallel to the regular air force. He resigned in 1990, reportedly due to what he deemed lack of sufficient support from IRGC leadership, according to Jamal S. Suwaidi.

Energy sector career 
Following departure from the IRGC, Refan entered MAPNA Group. He was manager and director of management committee of MAPNA for 17 years from its establishment to 2009.

Views 
According to the Israeli institute Intelligence and Terrorism Information Center, Refan is regarded a conservative figure within Iranian political spectrum.

References

Muslim Student Followers of the Imam's Line
Iranian electrical engineers
People from Kazerun
1958 births
Living people
Islamic Revolutionary Guard Corps personnel of the Iran–Iraq War
LFG Roland D.IV. The LFG Roland D.IV, later redesignated LFG Roland Dr.I was a German single engine, single seat triplane fighter flown in mid-1917. It produced no performance or operational advantages over existing types and only one was built.

Design and development
The D.IV was a single bay triplane with equally spaced, staggered wings; only the lowest had dihedral.  The central plane was mounted at mid-fuselage and the others passed above and below the fuselage, supported by centre section struts.  The wings were two spar structures and decreased in chord from top to bottom, so the interplane struts were not parallel but leant longitudinally apart. In plan the fabric covered wings were almost rectangular, apart from angled tips; their span decreased a little from top to bottom but all carried externally interconnected, short span ailerons. There was a small circular cut-out in the trailing edge of the upper wing above the cockpit to enhance the pilot's view.

The fuselage of the D.IV, like those of their earlier fighter designs, was a wooden monocoque but LFG abandoned their earlier Wickelrumpfe (wrapped fuselage) approach, which used thin bands of spruce veneer reinforced with fabric, in favour of a cheaper Klinkerrumpf (clinker fuselage) which followed boat building practice with overlapping spruce strips over a light wooden internal framework.  It was oval in cross-section, though the six cylinder, water-cooled upright inline Mercedes D.III was mounted with its cylinders and exhaust exposed above it, driving a two blade propeller with a large spinner. The fuselage tapered behind the open cockpit, where an unswept straight edged, blunt angle tipped tailplane, mounted on top of the fuselage, carried separate, tapered elevators. The vertical tail was rounded, with a rudder that extended below the tailplane to the keel. The conventional undercarriage had mainwheels on a single axle, supported by long V-struts to the lower fuselage, together with a short tailskid.

The single prototype ordered by Idflieg was tested during the Summer of 1917 but was badly damaged at the end of September. LFG rebuilt it using a similar Klinkerrumf intended for a D.VI biplane fighter and testing was soon resumed. It was decided that the Dr.I, as it was now known, showed no particular advantages over existing German fighters and development was abandoned.

Specifications

References

Bibliography

Triplanes
1910s German fighter aircraft
LFG Roland D.IV (Dr.I)
Aircraft first flown in 1917
Jamhuriya University of Science and Technology. Jamhuriya University of Science and Technology (JUST; , ) is an accredited private, higher educational institution in Somalia.
JUST was established in 2011.

Faculties
The university has currently the following faculties:

Faculty of Medicine & Health Science 

 Bachelor of Medicine and General Surgery
 Bachelor of Nursing
 Bachelor of Public Health
 Bachelor of Medical Lab Technology
 Diploma in Pharmacology

Faculty of Engineering 

 Bachelor of Civil Engineering
 Bachelor of Electrical Engineering

Faculty Computer & Information Technology 

 Bachelor of Computer Application
 Diploma in Information Technology 
 Diploma in Computer Networking

Faculty Economic & Business Management 

 Bachelor of Business Administration
 Bachelor of Public Administration
 Bachelor of Accounting & Finance

Accreditation

As of 2013, Jamhuriya University of Science & Technology (JUST) has the full accreditation of the Directorate of Higher Education and Culture of the Federal Government of Somalia.

References
Jamhuriya University Official Opening Ceremony.,
Jamhuriya University Blog.

External links

Universities in Somalia
2011 establishments in Somalia
Universities and colleges established in 2011
Kondor (satellite). Kondor, GRAU index 14F133, is a series of Earth imaging or military reconnaissance satellites developed by NPO Mashinostroyeniya for the Russian Aerospace Defence Forces which in 2015 became the Russian Space Forces and export customers. Satellites for the Russian military are designated "Kondor", whilst those for export are designated Kondor-E.

Kondor satellites are equipped to carry either synthetic aperture radar or electro-optical imaging payloads, with the first satellite, and are launched using the Strela carrier rocket, developed by NPO Mashinostroyeniya from retired UR-100NUTTKh missiles.

A mass simulator named Gruzomaket (aka Kondor-E-GVM, COSPAR 2003-055A ) was launched on 5 December 2003, and almost ten years later, on 27 June 2013, the first spacecraft was launched. Kondor No.202 (aka Kosmos 2487, Kondor 1, COSPAR 2013-032A) was operated by the Russian military, and carried a radar imaging payload. It was the first radar imaging satellite to be operated by the Russian military after the Soviet RORSAT and Almaz-T series. The first Kondor-E (Kondor-E 1, COSPAR 2014-084A) launched 19 December 2014 for South Africa.

Civilian versions of the satellite have been designed under the name Kondor-FKA or Kondor-FKA-M. The launch of the first Kondor-FKA satellite took place on 26 May 2023 from the Vostochny Cosmodrome, while the launch of the second took place on 30 November 2024 from the Baikonur Cosmodrome.

References

Reconnaissance satellites of Russia
Space synthetic aperture radar
NPO Mashinostroyeniya products