omniomni/omni-engineering huggingface dataset:
Routing bridge. A routing bridge or RBridge, also known as a TRILL switch, is a network device that implements the TRILL protocol and should not be confused with BRouters (Bridging Routers). RBridges are compatible with previous IEEE 802.1 customer bridges as well as IPv4 and IPv6 routers and end nodes. They are invisible to current IP routers and, like routers, RBridges terminate the bridge spanning tree protocol.

The RBridges in a campus share connectivity information amongst themselves using the IS-IS link-state protocol. A link-state protocol is one in which connectivity is broadcast to all the RBridges, so that each RBridge knows about all the other RBridges, and the connectivity between them. This gives RBridges enough information to compute pair-wise optimal paths for unicast, and calculate distribution trees for delivery of frames either to destinations whose location is unknown or to multicast or broadcast groups. IS-IS was chosen as for this purpose because:
 it runs directly over Layer 2, so it can be run without configuration (no IP addresses need to be assigned)
 it is easy to extend by defining new TLV (type-length-value) data elements and sub-elements for carrying TRILL information.

To mitigate temporary loop issues, RBridges forward based on a header with a hop count. RBridges also specify the next hop RBridge as the frame destination when forwarding unicast frames across a shared-media link, which avoids spawning additional copies of frames during a temporary loop. A Reverse Path Forwarding Check and other checks are performed on multi-destination frames to further control potentially looping traffic.

References

External links
 "Introduction to Trill" by Radia Perlman and Donald Eastlake

Computer networking
DeepFlight Super Falcon. The DeepFlight Super Falcon is a personal submarine designed by Graham Hawkes, a former civilian ocean engineer. It was hoped that the technology used in this submersible would allow travel to the deepest parts of the ocean.

Development 

The Super Falcon was designed by Graham Hawkes. Later, he started designing submersible vehicles for both the oil industry and those in the scientific research sectors. One of his earlier submersibles was featured in the James Bond film For Your Eyes Only. Another was used in producer James Cameron's Aliens of the Deep.

In 2005, Hawkes and adventurer Steve Fossett teamed up to create a submarine that could be piloted by an individual to the deepest part of the ocean. This spot in the Pacific Ocean, called Challenger Deep, is approximately  under the ocean's surface and is thought to be the deepest point in the ocean. Together they began to develop the Challenger submersible with this goal in mind. However, in 2007 Fossett lost his life in a fatal accident in the Sierra Nevada Mountains of California before the feat could be attempted.

The first test flight of the Super Falcon in 2009 ran into a few problems including getting the submersible stuck in a kelp bed, which had to be cut free with the help of a safety diver. Other initial problems included a broken prop and rudder while performing vertical dives and 90 degree rolls.

Design

Mark I
The Super Falcon is classified as a winged submersible with a numerical design designation of DF 302. With its wings deployed, it measures  wide x  x  long. The width is reduced to  with the side wings folded.

The electricity that drives the propulsion system is from batteries, the Super Falcon's cruise speed is between . Its maximum thrust is . The maximum rate at which it can make a descent is 200 ft/min and the maximum rate at which it can ascend is 400 ft/min. It can operate at a depth of 1,000 fsw with a payload of , or 2 people . It has a launch weight of .

Mark II
The redesigned Super Falcon is  long,  wide (wings folded or extended, respectively),  tall, and a launch weight of . It has a cruising speed of , under thrust of , with an operating depth of . It can carry a crew of 2, and a payload of  including the crew. The vehicle uses lithium ion batteries for energy storage.

Submarines 

The Mateschitz Super Falcon is a Mark II custom fitted to Red Bull billionaire Dietrich Mateschitz, for use at the island and resort that he owns, Laucala Island in Fiji. It is the first resort-based Super Falcon.

References

External links 

 
 by Thayer Walker - Outside Online May 2010

Submarines
Personal submarines
Profluid. Profluid is the French association of manufacturers of pumps and mixers, compressors and valves.

In 2011, the valve sector has represented a turnover of more than 2.7 billion euros; for the pump sector, the turnover was 2.3 billion euros ; finally the turnover of compressor sector was 1.6 billion euros (info INSEE 2011).  All these sectors are exporters.

The professional activities represented by '''Profluid'  have 170 companies and employed 28 000 persons in 2011 . Main mission of the trade association is to represent its members in discussions with the administration (French and/or European). PROFLUID also has a networking role : between members and with the end-user organizations.
Besides, the association is heavily involved in the development of concrete actions for reducing the environmental impact and carbon footprint of the products for its members. They participated in the development of an ecodesign methodology for mechanical products, which was published in France and is being adapted at European level. Regulatory matters such has the Ecodesign Directive, REACH Regulation or the Construction Products Regulation are also regular sources of action.

Internationally, members and representatives of 'Profluid' sit and contribute:
 in several standardization committees within the ISO,
 and European sectoral committees such as Europump, Pneurop and Comité Européen de l'Industrie de la Robinetterie.For reference website Profluid ''

See also 

Europe Orgalime 
Belgium Agoria 
Germany VDMA - Compressors, Compressed Air and Vacuum Technology 
Italy  
England British Compressed Air Society Limited (BCAS) 
Federation of manufacturers of compressors and vacuum pumps in Europe Pneurop

ISO International Organization for Standardization ISO

Notes and references 

Pump manufacturers
Trade associations based in France
Mindflex. Mindflex is a toy by Mattel by which, according to its description, the operator uses their brain waves to steer a ball through an obstacle course. Brain waves are registered by the enclosed EEG headset, which allows the user to control an air stream by concentrating, thus lifting or lowering a foam ball.  The game was released in the fall of 2009, and uses the same microchip as the MindSet from NeuroSky and homebuilt EEG machines.

Controversy 
Despite the science behind the technology developed by Mattel, outside scientists have questioned whether the toy actually measures brain waves or just randomly moves the ball, exploiting the well-known illusion of control. However, despite the John-Dylan Haynes experiments, supporters of the game stand behind the research that went into the development of Mindflex, and believe that the headset does indeed read EEGs.

See also
 Consumer brain–computer interfaces
 Brain-Computer Interface

References

External links
 http://www.bbc.com/future/story/20151026-a-teens-mind-controlled-arm-could-make-prosthetics-cheaper

Electroencephalography
Electronic toys
2010s toys
Mattel
Amazonas-class offshore patrol vessel. The Amazonas class comprises three offshore patrol vessels (OPVs) built by VT Shipbuilding (now BAE Systems Surface Ships). The ships entered service with the Brazilian Navy during 2012 and 2013.

Design and construction

The vessels are based on the Royal Navy's s, are  long, and have 80 man crews plus accommodation for 40 troops. They are designed to perform a range of Economic Exclusion Zone (EEZ) management, special operations and maritime law enforcement tasks.

The first vessel was named Port of Spain at her launch at BAE Systems Surface Ships’ Portsmouth facility, on 18 November 2009.

The second was named Scarborough on her launch a day later at Scotstoun in Glasgow, and began sea trials in July 2010, reaching .

The third was named San Fernando when launched on 16 July 2010 at Scotstoun on the River Clyde.

Operators

The Amazonas class were originally named as the Port of Spain class and built for the Trinidad and Tobago Coast Guard. Then, despite two of the vessels having been completed at the time and awaiting delivery, and with crew training ongoing in the United Kingdom, the Government of the Republic of Trinidad and Tobago (GORTT) cancelled the order in September 2010.

In December 2011 it was reported that the Brazilian Navy were interested in buying the vessels, and possibly up to five additional vessels of the same design. The sale, for £133 million, was then confirmed on 2 January 2012.

Amazonas was commissioned into the Brazilian Navy on 29 June in Portsmouth. During her one-month voyage to Brazil, she docked in the cities of Natal, Rio Grande do Norte and Salvador, Bahia in September, and was expected to arrive in Rio de Janeiro on 5 October.

Ships of class

Images

See also
 List of naval ship classes in service
 River-class patrol vessel, a design on which the Amazonas-class is based.

References

External links
Press release from BAE Systems
Product information from BAE Systems
BAE Systems Datasheet

Corvettes of the Brazilian Navy
Ships built on the River Clyde
Corvette classes
Khareef-class corvette. The Khareef class are three corvettes operated by the Royal Navy of Oman. The ships were built by BAE Systems at their shipyard in Portsmouth, as part of a £400m deal it also included training by VT Group.

Role
The three vessels are capable of:
 Protection of maritime areas of interest including EEZ
 Extended surveillance patrols
 Deterrent operations during times of tension
 Fully interoperable with joint and coalition operations
 Special operations
 Search and rescue
 Maritime disaster relief operations

Ships in class

Incidents 

In March 2012 three BAE engineers were injured after a gun misfired during testing off the Dorset coast.

References

External links

 BVT News Release regarding Al Shamikh launch
 Naval Technology
 Khareef class Ocean Patrol Vessel (OPV) - Royal Navy of Oman at navyrecognition.com

Corvettes of the Royal Navy of Oman
Ships built in Southampton
Corvette classes
PicoSpan. PicoSpan was a popular computer conferencing tool written by Marcus D. Watts for the Altos 68000. It was written in 1983 for M-Net, which was owned and operated by Mike Myers. Sometime in 1984, Marcus's employer, an Ann Arbor company called Network Technologies International (NETI), purchased the rights for PicoSpan planning to develop it into a commercial product called E-Forum.

History
Computer conferencing was first pioneered in Michigan on CONFER, PicoSpan, E-Forum, Caucus and Participate.

Functionality and impact
PicoSpan tried to provide CONFER's functionality while using the least amount of resources, though many users found it hard to use. It formed the basis for many conferencing systems run by hobbyists. and commercial ventures 

Picospan came with a toolbox of software customization utilities that could be used to make changes at the system and user level. It was tightly integrated with Unix and could provide transparent access to many external programs that formed a part of the Unix environment. Typing "unix" at the Pico prompt put the user in a shell and users could rapidly switch back and forth and move text from one to the other.

PicoSpan also permitted the linking of discussion threads into multiple conferences, at the same time, so that multiple groups could participate. On a big BBS with many users, not all conferences are followed, so it's advantageous if the more interesting discussions are cross linked.

PicoSpan also displays responses as a single integrated thread rather than a collection of separately displayed responses.  It relied on constrained choices: no one could start a new topic merely by responding to an old post, so discussions and topics didn't fragment. You couldn't respond to an individual's post and had to respond to the whole thread, forcing people to stay coherent and on-topic. However many people found it hard to use, because of its plain-text environment and steep learning curve.

Users normally dialed into the BBS over slow and flaky telephone lines. After providing the system with a name and password, they invoked Pico and brought up a long list of conference names like "Theology", "Arts", "Singles", "Twilight", "Health" and various other computer topics which were in turn grouped into themes like "Entertainment" or "Computers". The user could then type a command with the conference name as an argument and enter the conference. Once inside, they would find a series of numbered topics or threads each created by a user and each representing an asynchronous conversation. They could then post his comments.

The WELL still provides Picospan access, via ssh, and the Engaged graphical interface still uses the Picospan database of Unix files.  Marcus Watts had a direct effect on The WELL's culture: PicoSpan prevented censorship by preventing conference hosts (who are empowered to hide or delete any response posted in their forum) from influencing a discussion, by labeling such posts as being "<censored>".

References

External links
 Marcus D. Watts, Home Page

Bulletin board systems
History of the Internet
Defunct social networking services
Unix software
Sharp PC-E220. The Sharp PC-E220 was a 1991 pocket computer from Sharp Corporation featuring 32 KB RAM, 128 KB ROM and a 3.072 MHz CMOS-SC7852 CPU which was Z80A compatible. The display was able to display 4 lines x 24 characters/144 x 32 pixels. Programming languages were BASIC and Z80-Assembler.

The computer was powered by four consecutively ordered AA batteries which makes this computer the biggest of the Sharp pocket computer range, whereas the CPU made it the fastest. The BASIC interpreter is mostly compatible with the interpreter of the PC-14xx series.

See also
 Sharp pocket computer character sets

References

External links
http://wwwhomes.uni-bielefeld.de/achim/pc-e220.html The Sharp PC-E220 Homepage

PC-E220
PC-E220
Mårten Triewald. Mårten Triewald FRS (18 November 1691 – 8 August 1747), sometimes referred to as Mårten Triewald the Younger, was a Swedish merchant, engineer and amateur physicist.

Mårten Triewald was the son of Mårten Triewald the Elder, a farrier and anchorsmith of German origin.

Triewald's mercantile activities took him to London where he attended lectures in Newtonian Experimental Philosophy given by John Theophilus Desaguliers and with whom he later corresponded. In 1716 Triewald was employed as an inspector at a coal mine in Newcastle, where he studied mechanics and the steam engines used there, and made improvements to them. He returned to Sweden in 1726 and at Dannemora mine and built a steam engine there under the designation "fire and air machine" (eld- och luftmachin in archaic Swedish). This steam engine is believed to be the first steam engine in Sweden that was put to practical and industrial use.

In 1728 and 1729 Triewald held lectures in mechanics at the Swedish House of Nobility, and demonstrated a collection of physical instruments that he had bought in England. In 1732, these instruments were taken over by Lund University, and Triewald's assistant Daniel Menlös was made a professor of mathematics at the university. In 1729 he formed a diving company, and wrote about the use of diving bells and equipment for divers under the title Konsten att lefa under watn ("The art of living under water"). He also took an interest in bee-keeping and published on this subject (Tractat om bij, 1728).

Triewald was given the title director mechanicus, and in 1735 was appointed kapten-mekanikus (Captain of Mechanics) at the Fortification Administration, deemed to be "the only one in the country suitable for this post", and given an annual pension by the Parliament.

In 1729, he was elected a member of the Royal Society of Sciences in Uppsala. In 1739, he was one of six founders of the Royal Swedish Academy of Sciences in Stockholm. He was also elected a Fellow of the Royal Society in 1731.

The mansion located in the southwestern part of Kungsholmen that Triewald bought in 1739, Triewalds malmgård, still exists and carries his name.

Marten Triewalds daughter Margaret Elisabeth was married to accountant Johan Falkensson (died 1779) who leased Hersbyholm on Lidingö 

Mårten Triewald had a brother named Samuel von Triewald, who was a poet, politician and one of the first 'critics' in Sweden. He was also a member of the Royal Swedish Academy of Sciences.

See also
Triewaldsgränd

References

1691 births
1747 deaths
Swedish merchants
Swedish engineers
Swedish scientists
Members of the Royal Swedish Academy of Sciences
Fellows of the Royal Society
18th-century Swedish businesspeople
Rolls-Royce Marine Spey. The Rolls-Royce Marine Spey is a marine gas turbine based on the Rolls-Royce Spey and TF41 aircraft turbofan engines. The Marine Spey currently powers seven ship classes including the Royal Navy's Type 23 frigates and provides a power output of 19.5 MW (about 26,150HP). The Marine Spey incorporates technology from the Tay and RB211.

Applications
 
 
 
 
 
 
 
 
 Type 23 frigate 
 Type 22 frigate

Specifications

See also

References

External links

 Rolls-Royce.com Spey Marine gas turbine page

Aero-derivative engines
Marine gas turbines
Westrail S class. The S class are a class of diesel locomotives built by Clyde Engineering, Forrestfield for Westrail in 1998.

History
The S class were the first and only dual-cab locomotives purchased by Westrail. In May 1996 nine were ordered from Clyde Engineering as part of an order that also included 15  Q class locomotives. The order later extended to eleven. They are an evolution of the FreightCorp 82 class. All were assembled at a facility established by Clyde Engineering within Westrail's Forrestfield Depot to fulfill the contract. The frames were built at Clyde's Somerton plant with other components manufactured at Kelso.

The S class locomotives entered service in June 1998 hauling ore and mineral trains in South West Western Australia. All were in service by November 1998

All were included in the sale of Westrail to Aurizon in December 2012, with the class redesignated as the 3300 class. In 2012, all were included in service operated by Aurizon.

In 2008, Rio Tinto ordered two standard gauge JT42Cs of the same design as the S class for the Weipa bauxite railway, numbered R1005 and R1006. They were delivered in 2009. R1005 remains in service today, while R1006 was withdrawn and scrapped following a collision in September 2019.

References

Aurizon diesel locomotives
Clyde Engineering locomotives
Co-Co locomotives
Diesel locomotives of Western Australia
Railway locomotives introduced in 1998
Diesel–electric locomotives of Australia
3 ft 6 in gauge locomotives of Australia
HMS Pathfinder (G10). HMS Pathfinder was a P-class destroyer built for the Royal Navy during the Second World War. She was damaged while serving in the Far East, and was scrapped after the end of the war.

Description
The P-class destroyers were repeats of the preceding O class, except that they were armed with 4-inch (102 mm) anti-aircraft guns. They displaced  at standard load and  at deep load. The ships had an overall length of , a beam of  and a deep draught of . They were powered by two Parsons geared steam turbines, each driving one propeller shaft, using steam provided by two Admiralty three-drum boilers. The turbines developed a total of  and gave a maximum speed of . The ships carried a maximum of  of fuel oil that gave them a range of  at . The ships' complement was 176 officers and men.

Pathfinder was armed with four QF 4-inch Mark V guns in single mounts, two pairs [superfiring] fore and aft. Her light anti-aircraft suite was composed of one quadruple mount for 2-pounder "pom-pom" guns and four single Oerlikon 20 mm cannon. The ship was fitted with two above-water quadruple mount for  torpedoes. The ship was fitted with four depth charge throwers and two racks for 70 depth charges.

Construction and career
The ship was built by Hawthorn Leslie & Co, and was launched on 10 April 1941, and commissioned in April 1942. During the war, Pathfinder was active in a number of theatres, and helped to sink several enemy submarines.

Pathfinder was commanded by Commander Edward Albert Gibbs from January 1942 to November 1943, during which time she assisted the destroyer  in sinking the , assisted the destroyers  and  to sink the , assisted in the rescue of nearly 5,000 survivors from the troopship  after it was torpedoed off Oran, Algeria. She also sank the  with assistance from Swordfish aircraft flying off the aircraft carrier .

On 11 February 1945, Pathfinder was hit by an Imperial Japanese army fighter-bomber Ki-43 off Ramree, and was taken out of service. She sailed back to the UK using her starboard engine. On arrival at Devonport she was placed in reserve. She was then sold to the ship breakers Howells and scrapped in November 1948 at Milford Haven.

Notes

References

External links 
uboat.net on HMS "Pathfinder"

O and P-class destroyers
World War II destroyers of the United Kingdom
Ships built on the River Tyne
1941 ships
Maritime incidents in February 1945