omniomni/omni-engineering huggingface dataset:
Pennsylvania Railroad class B6. The Pennsylvania Railroad's class B6 was its most successful class of switcher locomotive, or as the PRR termed them "shifter". The PRR preferred the 0-6-0 wheel arrangement for larger switchers, whereas on other railroads the 0-8-0 gained preference. The PRR generally used 2-8-0s when larger power was required.

History 
Altoona Works constructed the prototype B6 in 1902. The B6 had the Pennsylvania's trademark square-shouldered Belpaire firebox and  drivers. They were constructed as saturated steam engines, rebuilt with superheaters later as class B6s, and had Piston valves and Stephenson valve gear. A total of 79 were built by Baldwin and Lima, in addition to Altoona, between 1902 and 1913.

The next version built was the B6sa, 55 of which were built at Altoona during 1913–1914. These had radial-stay fireboxes, common elsewhere but rare on the Pennsylvania, and they replaced the Stephenson gear with the more modern Walschaerts valve gear. Steam delivery pipes were outside, like all other PRR modern power. All were built superheated.

Finally, during 1916–1920, 238 of class B6sb were built. These were the final, definitive type, and had a Belpaire firebox, but were otherwise little changed from the B6sa. The final 97 locomotives had piston valves mounted outboard of the cylinders, instead of inbound as previously built, giving the cylinder assemblies an outward cant at the top, rather than inward.

All B6sa and B6sb locomotives were retrofitted with power reverse to make the frequent back-and-forth of switching quicker and easier.

The last PRR locomotive in active service was #5244, leased to Union Transportation of New Egypt, New Jersey until July 1959. This was considered quite an achievement considering the Pennsylvania Railroad's extensive steam program.

In 1939, toy train manufacturer Lionel introduced their version of Pennsy's B6 in several variations including a scale version (scale couplers and smaller flanges to operate on special track) along with six versions of what would later become known as "semi-scale."

Two B6s survive:

- B6sb #1670 was saved in the PRR's historic collection at Northumberland, Pennsylvania and was donated to the Railroad Museum of Pennsylvania along with the majority of that collection.

- B6sa #60 was on a siding in Hockessin, Delaware, along the Wilmington and Western Railroad. It has a larger tender, from a 2-8-0 Consolidation, but it is intact, albeit in poor condition. In 2019–2020, it was donated to the Historic Red Clay Valley Inc., and the locomotive remains on a siding near Mt. Cuba. B6sa #60 then was moved to the Wilmington and Western's railroad shops in Wilmington, Delaware on May 9, 2024 where it will be cosmetically restored and then put on display as an exhibit in Lewes, Delaware.

Notes

References

External links 
 
 
 

Steam locomotives of the United States
Baldwin locomotives
Lima locomotives
0-6-0 locomotives
B6
Railway locomotives introduced in 1902
Standard gauge locomotives of the United States
Shunting locomotives
Armstrong Siddeley Double Mamba. The Armstrong Siddeley Double Mamba is a turboprop engine design developed in the late 1940s of around . It was used mostly on the Fairey Gannet anti-submarine aircraft developed for the Fleet Air Arm of the Royal Navy.

Design and development
The Double Mamba (rarely known as the Twin Mamba) was a development of the Armstrong Siddeley Mamba with two Mambas driving contra-rotating propellers through a combining gearbox.

Engine starting was by cartridge, however, forced air restart was achieved in flight. One engine could be shut down in flight to conserve fuel. Shutting down one engine also stopped one of the propellers.

Variants

ASMD.1 (2 x ASMa.3) used on Fairey Gannet A.S. Mk.1 and Blackburn B-88
ASMD.3 (2 x ASMa.5) used on Fairey Gannet A.S. Mk.4
ASMD.4 (2 x ASMa.6) used on Fairey Gannet AEW Mk.3
ASMD.8 (2 x ASMa.6) used on Fairey Gannet AEW Mk.3

Applications
 Blackburn B-88
 Fairey Gannet
The Double Mamba engine was also proposed for the Westland Westminster, a 30-seat helicopter that was later built as a prototype powered by a pair of Napier Eland E220 turboshaft engines.

Engines on display

Preserved Double Mamba engines are on public display at the:
Australian National Aviation Museum
Deutsches Museum Flugwerft Schleissheim
Gatwick Aviation Museum
South Yorkshire Aircraft Museum
Imperial War Museum Duxford
Midland Air Museum
Queensland Air Museum
East Midlands Aeropark
Museum of Berkshire Aviation

Specifications (ASMD.3)

See also

References

Notes

Bibliography

 Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.

External links

 Original Armstrong Siddeley Double Mamba advertisement - Flight, 29 June 1950

1940s turboprop engines
Double Mamba
Knowledge Machine. The Knowledge Machine is a concept of Seymour Papert, which is intended to enable children to explore any situation and engage them completely. Although Papert never clearly defined the Knowledge Machine, one interpretation is a virtual reality device that allows the user to slip into any situation and have a simulated experience of that situation.

The Knowledge Machine (KM) is also a developed system at the University of Texas for knowledge representation and reasoning within the artificial intelligence field. km was developed and continues to be actively maintained by Peter Clark and Bruce Porter.

References 

 Piotr Wozniak, Knowledge machine.

Virtual learning environments
Virtual reality
Yeonsung University. Yeonsung University, is a college in Manan-gu, Anyang City, Gyeonggi province, South Korea.  It opened on March 15, 1977, as Anyang Industrial Technical School.  It was officially designated a technical junior college in 1979.  The school includes scientific faculties of electronic communications, computer information, industrial design, technology management, environmental engineering, interior construction; domestic faculties of hotel culinary management and fashion design; social service faculties of early childhood education, physical education, social welfare, English, tourism Chinese, and liberal arts.  The campus covers 202,000 m2, and also hosts a library and research institutes of industrial design, construction technology, Surface Mount Technology automation, and sports science. On September 1, 2010, Anyang Technical College was permitted to change the school's English name to Anyang Science University. Following this change, on May 23, 2012, Anyang Science University was officially renamed Yeonsung University.

Notable people
Oh Ji-ho, actor
Shin Jung-geun, actor
Hong Su-zu, model, actress

See also
Education in South Korea
List of colleges and universities in South Korea

External links
Official school website, in Korean

Anyang, Gyeonggi
Universities and colleges in Gyeonggi Province
Vocational education in South Korea
1977 establishments in South Korea
Diodes (disambiguation). Diode is a device that is a two-terminal electronic component that conducts electric current in only one direction.

Diode or Diodes may also refer to:

 Data diode, a type of unidirectional computer network
 Diodes Incorporated, a global manufacturer and supplier of application specific standard products within the broad discrete, logic and analog semiconductor markets
 The Diodes, a Canadian punk/new wave band

See also
 DIOD, ICAO code for Odienné Airport in Côte d'Ivoire
Brück aerial testing facility. The Brück aerial testing facility  is a facility for testing aerials at Brück, south of Berlin. It was established in 1939.

Overview
On the Brück aerial testing facility there are two  wood-framework towers built in 1963, made without any metallic parts and used for mounting aerials to measure their characteristics. One of these towers, the Messturm III, consists of two towers connected by a bridge on top, while the other, the Messturm II, is from conventional design.

A third wood tower, the former Messturm I, which was built in 1958, was destroyed in a fire in 1979.

See also
List of towers

References

External links
 
 
 
 
 http://www.skyscraperpage.com/diagrams/?b41640
 http://www.skyscraperpage.com/diagrams/?b41641
 Satellite photograph Messturm II
 Satellite photograph Messturm III

Buildings and structures completed in 1963
Towers in Germany
Buildings and structures in Potsdam-Mittelmark
Wooden towers
Fretwork. Fretwork is an interlaced decorative design that is either carved in low relief on a solid background, or cut out with a fretsaw, coping saw, jigsaw or scroll saw. Most fretwork patterns are geometric in design. The materials most commonly used are wood and metal. Fretwork is used to adorn furniture and musical instruments. The term is also used for tracery on glazed windows and doors. Fretwork is also used to adorn/decorate architecture, where specific elements of decor are named according to their use such as eave bracket, gable fretwork or baluster fretwork, which may be of metal, especially cast iron or aluminum. Installing elaborate wooden fretworks on residential buildings, known as gingerbread trims, became popular in North America in the late 19th century.

Fretwork patterns originally were ornamental designs used to decorate objects with a grid or a lattice. Designs have developed from the rectangular wave Greek fret to intricate intertwined patterns. A common misconception is that fretwork must be done with a fretsaw.  However, a fretwork pattern is considered a fretwork whether or not it was cut out with a fretsaw.

Computer numerical control (CNC) has brought about change in the method of timber fretwork manufacture. Lasers or router/milling cutting implements can now fashion timber and various other materials into flat and even 3D decorative items.

Fretwork is often used in Squeezebox type instruments to allow air to pass in and out of the instrument while shielding the action board.

Gallery

References

External links

See also
Openwork
Sukashibori - In Japan case.

Jewellery making
Woodworking
Fabrication (metal)
Cochin University College of Engineering Kuttanad. Campus at Kuttanad was established in 1999 under the aegis of the university. It is situated in a serene and beautiful 42-acre campus in Pulincunnoo, Kannady, Kuttanad, the rice bowl of Kerala in Alappuzha district. It offers B.Tech. programs in Civil Engineering, Computer Science & Engineering, Electrical & Electronics Engineering, Electronics and Communication Engineering, Information Technology, Mechanical Engineering and M.C.A. Many of the faculty members have refined and sharpened their knowledge through rigorous research activities and published their findings in various national and international science and technical journals. The university raised the status of college to that of a Research Center in 2017. There are 42 Research Scholars working for their PhD under nine research supervisors in the college. The faculty under which the PhD programs are offered are Faculty of Engineering, Faculty of Technology and Faculty of Social Sciences under the Cochin University of Science and Technology.

The college is situated on the outskirts of Pulincunnu Panchayat, near the village of Kannady. The college attracts students from all parts of India, particularly from Kerala, Uttar Pradesh, Bihar, West Bengal, Jharkhand and Delhi.

Admission

Admissions are based on an All India Entrance Examination known as Common Admission Test (CAT) conducted by the university which includes papers for admission to undergraduate courses. The college has got students from all over the country.

Principals
 Prof. James Kattady (Special Officer) 1999 - 2004
 Dr. M I Thampan (2004–2007)
 Dr. Preetha Mathew (2007)
 Prof. Oommen Samuel (2007–2009)
 Dr. P A Job (2009)
 Dr. Joseph Kutty   Jacob (2010–2012)
 Dr. Mathew Cheriyan (2012–2015)
 Dr. Sreejith P S (2015–2017)
 Dr. P A Job (2017)
 Dr.Sunilkumar N (2017–2020)
 Dr. Joseph Kutty   Jacob (2020–2024)
 Dr. Ashalatha (2024–present)

Courses
 B.Tech. Civil Engineering: annual intake 45 seats 
 B.Tech. Electrical and Electronics Engineering: annual intake 45 seats
 B.Tech. Electronics and Communications Engineering: annual intake 45 seats
 B.Tech. Computer Science and Engineering: annual intake 120 seats
 B.Tech. Information Technology: annual intake 120 seats
 B.Tech. Mechanical Engineering: annual intake 45 seats (canceled this course in cucek)
 Master of Computer Applications: annual intake 45 seats

References

External links 
Cochin University of Science and Technology 
www.cucek.in 
Facebook group

Engineering colleges in Kerala
Universities and colleges in Alappuzha district
Educational institutions established in 1999
1999 establishments in Kerala
British Rail Class D2/11. The British Rail Class D2/11 was a British class of locomotive designed in 1958 by Brush Traction and Beyer, Peacock & Company, which co-operated to produce five prototype diesel-electric shunting locomotives of 0-4-0 wheel arrangement. They were intended to demonstrate a new generation of diesel shunters for industrial and mainline use. Two were loaned to British Railways for trials and one, number D2999, was subsequently purchased by BR. However, no large scale orders resulted from these demonstrators.

Similar locomotives were built for industrial use, notably for steelworks in South Wales and Yorkshire. These were built by Brush Traction working with Bagnall.

D2999
D2999 was loaned by Brush Traction to British Railways (BR) from  January 1960 and was allocated to Stratford TMD where it was subsequently allocated to the goods yard at Globe Road & Devonshire Street. The locomotive proved popular at Devonshire Street and in September 1960 and subsequently purchased by them for further use. It was classified as British Rail Class D2/11 at this point,  and remained there bar the odd maintenance visit to  Stratford, until 15 October 1967 when it was withdrawn. It was fitted with a National M4AAV6 engine of , had a maximum speed of  and weighed . D2999 is preserved on the Middleton Railway.

D9998
D9998 was on loan to BR for approximately a year from mid-1961. It was fitted with a Petter-McLaren engine of , had a maximum speed of  and weighed .

Sources

External links
 

D002.11
Beyer, Peacock locomotives
Brush Traction locomotives
B locomotives
Railway locomotives introduced in 1960
Standard gauge locomotives of Great Britain
Diesel–electric locomotives of Great Britain
Shunting locomotives
J. Elfreth Watkins. 

J. Elfreth Watkins Sr.
John Elfreth Watkins Sr. (1852–1903) was Curator of Mechanical Technology at the United States National Museum (Smithsonian Institution). He received his education at Lafayette College, graduating in 1871, and worked first for the Delaware and Hudson Canal Company, as a mining engineer, for a year, and then for the Pennsylvania Railroad as assistant engineer of construction. Disabled in 1873 by an accident that resulted in the loss of his right leg, he was reassigned to the Amboy division of the railroad. In 1883 he became chief clerk of the Camden and Atlantic Railroad and in 1884 chief clerk of the Amboy division of the Pennsylvania Railroad. 

In that same year, he became Honorary Curator of Transportation at the National Museum, taking the job full-time after two years. He left to organize the Pennsylvania Railroad's exhibits at the 1893 World's Columbian Exposition; stayed in Chicago for a year organizing the Department of Industrial Arts at the Field Columbian Museum; and then returned to the Smithsonian, where he was curator of Mechanical Technology until his death in 1903. 

He played a key role in the preservation of the John Bull steam locomotive and its subsequent public displays by the Smithsonian Institution.

J. Elfreth Watkins Jr.

In 1900, his son John Elfreth Watkins Jr. (1875–?) contributed an article to the Ladies' Home Journal, entitled What May Happen in the Next Hundred Years.
Watkins Jr.'s predictions were remarkably accurate for 1900.

References

 Massa, William R., Jr., Smithsonian Institution (2004) Finding Aids to Personal Papers and Special Collections in the Smithsonian Institution Archives: Record Unit 7268; J. Elfreth Watkins Collection, 1869, 1881–1903, 1953, 1966 and undated, Retrieved March 3, 2008.
 Genealogy information
Marcus Benjamin, "John Elfreth Watkins", Science September 4, 1903, NS VOL XVIII Number 453, p. 300 
 

1852 births
1903 deaths
American people in rail transportation
Smithsonian Institution people
American civil engineers
CLP. CLP may stand for:

Biology
 CLP protease family, a family of proteolytic enzymes
 Endopeptidase Clp, an enzyme complex
 ATP-dependent Clp protease proteolytic subunit, a catalytic subunit of the Clp complex (encoded by the CLPP gene in humans)

Businesses 
 CLP Group, formerly China Light and Power
 Connecticut Light and Power Company

Computing, mathematics, and technology 
 Cell Loss Priority
 COIN-OR Linear Program Solver
 Communication Linking Protocol
 Congruence lattice problem
 Constraint Logic Programming
 Constraint logic programming (Real)
 Control Language Programming, an IBM programming language used on the System/38, AS/400, and successors
 Convergent Linux Platform

Political parties 
 Canadian Labour Party, former
 Communist Labor Party of America, predecessors of the Communist Party USA
 Constituency Labour Party, a sub-division of the British Labour Party representing a single UK constituency
 Country Liberal Party, Northern Territory, Australia

Certifications 
 Certificate in Legal Practice (Malaysia)
 Certified Landscape Professional

Transport
 Clapham High Street railway station, London, National Rail station code CLP
 Clarks Point Airport, Alaska, IATA airport code CLP

Other uses 
 AOL Community Leader Program
 CLP Regulation on classification, labelling and packaging of chemicals, EU
 Chilean peso, the currency of Chile by ISO 4217 code
 Cleft lip and palate
 Cloppenburg (district), Germany
 Copa de la Liga Profesional, an Argentine football competition
British Rail Class 80. Class 80 was the TOPS classification allocated by British Rail to the prototype 25 kV AC electric locomotive.  This locomotive was built by Metropolitan-Vickers, initially as a prototype gas turbine–electric locomotive, numbered 18100.  British Rail allocated the number E1000 (and later E2001) to the locomotive following its conversion from gas turbine propulsion.

Conversion

Its new electric propulsion meant it was rated at , giving a maximum speed of  and weighing . In addition, it was also converted from Co-Co to A1A-A1A wheel arrangement when the centre traction motor from each bogie was removed.  The new traction motor rating (with four motors) was about the same as the original rating (with six motors).  This suggests that new traction motors were fitted.

The conversion of the locomotive began in January 1958 when the locomotive was moved from storage at Dukinfield Works to the Bowesfield Works at Stockton-on-Tees. The work involved the removal of the gas turbine unit, main generator, fuel tank, air filters, the centre traction motor from each bogie and all of the ancillary equipment used for the gas turbine unit.

Once the locomotive had been stripped, the new electrical equipment was installed which included the transformer, the Stone-Faiveley pantograph (for which a section of the roof had to be lowered), a Brown Boveri air blast circuit breaker and the Hackbridge-Hewittic mercury arc rectifier units.

The cabs of the locomotive were converted from Western Region right-hand drive to the standard British Rail left-hand drive arrangement. The rebuilt locomotive was completed and ready for trials in October 1958. It retained its original BR black livery, with a silver stripe around the middle of the body and silver numbers.

Usage
The locomotive was used to prepare the ground for the 25 kV AC electrification being installed on the West Coast Main Line, including the testing of overhead line equipment and staff training.

Withdrawal

Once the production locomotives (Class 81 onwards) were in service, E2001 was no longer required. It was put into store at the end of 1961, and lasted for over ten years at various locations. It was officially withdrawn in April 1968 and scrapped in November 1972 at J Cashmore in Great Bridge.

Models 
E1000/E2001 is being made as a kit and a ready-to-run model in OO gauge by Silver Fox Models.

References

Sources

External links

80
Metropolitan-Vickers locomotives
A1A-A1A locomotives
25 kV AC locomotives
Railway locomotives introduced in 1958
Scrapped locomotives
Individual locomotives of Great Britain
Unique locomotives
Standard gauge locomotives of Great Britain
USCGC Alex Haley. USCGC Alex Haley (WMEC-39) is a United States Coast Guard Cutter and former United States Navy vessel that was recommissioned for Coast Guard duty on 10 July 1999. It first entered service as USS Edenton (ATS-1), an  on 23 January 1971. In 1995, Edenton won the Marjorie Sterrett Battleship Fund Award for the Atlantic Fleet.

The conversion from a salvage ship to a Coast Guard cutter involved the removal of the stern towing machine, forward crane, and A-frame, and the installation of a flight deck, retractable hangar, and air-search radar.  Additionally, her four aging Paxman diesel engines were replaced with four 16-cylinder Caterpillar diesels.

The cutter was named after author and journalist Alex Haley, the first chief journalist of the Coast Guard, the first African-American to reach the rank of chief petty officer, and the Pulitzer Prize-winning author of Roots: The Saga of an American Family.  Haley served in the Coast Guard for 20 years.

The vessel's current home port is Kodiak, Alaska at the Coast Guard Base Kodiak from where she carries out her Fishery Law Enforcement and Search and Rescue primary missions.

In fiction
In the 2007 novel Robert Ludlum's The Arctic Event by James H. Cobb, Alex Haley is the ship that takes the heroes out to the island where a Tu-4 laden with anthrax crashed during the Cold War.

In the 2016 novel Goliath by Shawn Corridan & Gary Waid, Alex Haley and  are the two Coast Guard cutters that respond to the fire aboard and subsequent stranding of a Russian ULCC.

Photos

References

Notes

Sources
 USCGC Alex Haley

External links

 
 

Edenton-class salvage and rescue ships
Ships built in Lowestoft
1968 ships
Medium endurance cutters