omniomni/omni-engineering huggingface dataset:
Enzo Martins Peri. Enzo Martins Peri is a Brazilian Army general who was the commander of the Brazilian Army from 2007 to 2015.

Early life and education

Peri was born in Rio de Janeiro on April 11, 1941, and begun his military career in February 1960, when he entered the Military Academy of Agulhas Negras. He graduated in 1962 and later made the course of Construction and Fortification in the Instituto Militar de Engenharia, the Advanced Course of Engineers in the Escola de Aperfeiçoamento de Oficiais (Brazilian Advanced School) and the General Staff Officer Course in the Escola de Comando e Estado-Maior do Exército ().

Career
Peri was an instructor at the Escola de Aperfeiçoamento de Oficiais and commanded the 9th Combat Engineering Company in Rio de Janeiro, served in the 1st Construction Engineer Brigade in João Pessoa, and in the Army Minister Cabinet in Brasília. He was also an instructor at the Brazilian Army Mission in Paraguay and commanded the 9th Construction Engineering Battalion Cuiabá. Later was Chief of Staff of the 2nd Construction Engineer Brigade and of the 12th Military Region, both situated in Manaus. Peri was previously a Cabinet Chief of the Army General Secretary in Brasília.

Promoted to General-de-Brigada () in March 1995, he was an Army General Secretary in Brasília, 2nd Construction Engineer Brigade commander in Manaus, 1st Construction Engineer Brigade commander in João Pessoa, and a Cooperation Engineering Works director in Brasília.

In March 1999, he ascended to General-de-Divisão (). In this rank he was 2nd Military Region commander (São Paulo) and deputy chief of the Engineering and Constructions Department in Brasília.

In March 2003, Peri was promoted to General-de-Exército (), the highest rank he has ever held. For four years Peri was chief of the Army Engineering and Constructions Department in Brasília. At the behest of the Brazilian government, he assumed command of the Brazilian Army from Francisco Roberto de Albuquerque in March 2007, during the second term of President Luiz Inácio Lula da Silva.

References

External links

Brazilian generals
Military personnel from Rio de Janeiro (city)
Living people
1941 births
20th-century Brazilian military personnel
21st-century Brazilian military personnel
Characteristic admittance. Characteristic admittance is the mathematical inverse of the characteristic impedance.
The general expression for the characteristic admittance of a transmission line is:

where
 is the resistance per unit length,
 is the inductance per unit length,
 is the conductance of the dielectric per unit length,
 is the capacitance per unit length,
 is the imaginary unit, and
 is the angular frequency.

The current and voltage phasors on the line are related by the characteristic admittance as:

where the superscripts  and  represent forward- and backward-traveling waves, respectively.

See also
 Characteristic impedance

References

Electricity
Physical quantities
Distributed element circuits
National Association of Sewer Service Companies. The National Association of Sewer Service Companies or NASSCO is a not-for-profit North American trade organization, established in 1976 "to increase the awareness of aging underground infrastructure and to provide viable solutions through education, technical resources and industry advocacy". NASSCO's intent is to research, train and educate members and non-members on rehabilitation of underground utilities using trenchless technology. Ultimately, NASSCO is committed to set the "industry standards for the rehabilitation of underground pipelines, and to assure the continued acceptance and growth of trenchless technologies".

Publications 
NASSCO has developed multiple publications covering varied topics. The following is the list of current publications.
 Manual of Practices
 Inspector's Handbook
 Specification Guidelines
 Trenchless Assessment Guide for Rehabilitation
 Pipeline Assessment & Certification Program (PACP) Reference Manual
 Inspector Training Certification Program (ITCP) for Cured-in-Place Pipes (CIPP)
 Inspector Training Certification Program (ITCP) for Manhole Rehabilitation
 Jetter Code of Practices
 RehabZone

References

External links 
 National Association of Sewer Service Companies

Tunnelling organizations
Trenchless technology
Excalibur Aircraft Excalibur. The Excalibur is an American two seats-in-tandem, high wing, pusher configuration ultralight aircraft that is manufactured in kit form for amateur construction, by Excalibur Aircraft of Sebring, Florida. It was introduced in 1993.

The Excalibur is available in the US amateur-built and light-sport aircraft categories and in Canada in the amateur-built, BULA and AULA categories. In Europe it qualifies under the Fédération Aéronautique Internationale microlight rules.

Design and development
The Excalibur was designed as "clone" of the Quad City Challenger II aircraft. The company took the basic Challenger design and incorporated many changes, including mounting the engine upright allowing larger propellers and the Rotax gearbox to be mounted, lengthening the tailboom and enlarging the tail vertical surface to increase stability, shortening the ailerons and replacing control cables with torque tubes. The optional Dacron covering on the Challenger was replaced with Superflite standard aircraft fabric, the fuselage was lengthened to give more backseat room and the nosecone was reduced in size to provide better over-the-nose visibility. The design was also streamlined to reduce drag and round cross-section wing struts were replaced with aerodynamic extrusions. The Challenger's rigid landing gear was replaced with a bungee-suspended system.

Regarding the landing gear improvements reviewer Andre Cliche, author of the Ultralight Aircraft Shopper's Guide,  said:

Variants
Excalibur
Basic model with  Rotax 503,  Rotax 582,  Hirth 3503,  Hirth 3203 or the  Hirth 3202 two-stroke engines. 750 completed and flown by the end of 2011.
Excalibur Four Stroke
Model with HKS 700E  or  Jabiru 2200  four-stroke engines. 400 completed and flown by the end of 2011.
Excalibur Wide Body (Stretch)
Model with wider fuselage, also called the Excalibur Stretch. 750 completed and flown by the end of 2011.

Specifications (Excalibur)

See also

References

External links

1990s United States ultralight aircraft
Light-sport aircraft
Single-engined pusher aircraft
High-wing aircraft
Aircraft with fixed tricycle landing gear
Single-engined piston aircraft
Stearman XBT-17. The Stearman XBT-17 was a prototype 1940s American two-seat low-wing monoplane primary trainer designed and built by Stearman Aircraft (as the Model X-90). It was evaluated by the United States Army Air Force in 1942 as the XBT-17.

Design and development
The X-90 was a low-wing cantilever monoplane with two-seats in tandem under an enclosed canopy. It had a fixed conventional landing gear and was powered by a  Lycoming R-680 engine and first flew in 1940. It had wooden wings and a steel tube forward fuselage in order to minimize use of aluminum. In 1942 the aircraft was re-engined with a  Pratt & Whitney R-985 engine and redesignated the Model X-91. The X-91 was evaluated by the United States Army Air Force as the XBT-17 but no more were built.

According to Edward H. Phillips, "At that time, worries at the War Department about a shortage of strategic materials such as aluminum alloy were rampant. The wood/metal composite construction of the proposed monoplane, which required more raw materials than the biplane trainers on an aircraft-by-aircraft basis, was a major factor in the Air Corps' decision not to place the XBT-17 into production, according to a Boeing technical report."

Variants
Stearman X-90
Prototype basic trainer with a  Lycoming R-680 engine.
Stearman X-91
The X-90 re-engined with a  Pratt & Whitney R-985 engine for USAAF evaluation.
Stearman XBT-17
United States Army Air Force designation for the X-91.

Specifications (XBT-17)

See also

References

Notes

Bibliography

 
 

BT-17
1940s United States military trainer aircraft
Single-engined tractor aircraft
Low-wing aircraft
Aircraft first flown in 1940
McDonnell XHJH Whirlaway. The McDonnell XHJH Whirlaway, aka McDonnell Model 37, is a 1940s American experimental transverse-rotor helicopter designed and built by McDonnell Aircraft Corporation for the United States Navy and was the largest helicopter at the time, as well as the first successful twin-engined twin-rotor helicopter in the world.

Design and development
In 1944, the United States Navy issued a requirement for a large rescue helicopter with capacity for ten occupants. The design was originally designated XHJD-1; shortly after flying it was re-designated the XHJH-1. It was derived from the single-engined, twin rotor Platt-LePage XR-1. James McDonnell had invested in that company in 1942 and some of his engineers had been working there, gaining experience of helicopter design and production techniques. McDonnell took control of the company in June 1944. The XHJH-1 first flew two months later. It had twin side-by-side  rotors at the end of pylon wings which turned in opposite directions. Each rotor was powered by a  Pratt & Whitney R-985-AN-14B Wasp Junior engine.

Variants
XHJD-1
Company designation Model 37.  Original United States Navy designation.
XHJH-1
Designation changed before first flight.
HJD-1
Company designation Model 37A and Model 61.  Proposed production version.

Aircraft on display
The sole XHJH-1 is held by the National Air and Space Museum.

Specifications

See also

References

External links

 McDonnell XHJD-1 Whirlaway in NASM Collection 

1940s United States military utility aircraft
HJ1H Whirlaway
Aircraft first flown in 1946
1940s United States helicopters
Transverse rotor helicopters
Twin-engined piston helicopters
Aircraft with fixed conventional landing gear
General Electric LM1600. The General Electric LM1600 is an industrial and marine gas turbine produced by GE Aviation. The LM1600 is a derivative of the General Electric F404 aircraft engine series.  The LM1600 delivers 20,000 shaft horsepower (shp) (14,920 kW) with a thermal efficiency of 37 percent at ISO conditions.

Applications

Applications include marine propulsion, and industrial use at Dusty Lake Station and Foret LaZaida.

Examples of marine applications
 Destriero
 Enigma
 HSC Stena Voyager
 HSC Stena Explorer
 HSC HSS Discovery
 Mols-Linien

See also

References

External links
 Official site (GEAE).

Aero-derivative engines
Gas turbines
Marine engines
NOMFET. NOMFET is a nanoparticle organic memory field-effect transistor.  The transistor is designed to mimic the feature of the human synapse known as plasticity, or the variation of the speed and strength of the signal going from neuron to neuron.  The device uses gold nano-particles of about 5—20 nm set with pentacene to emulate the change in voltages and speed within the signal. This device uses charge trapping/detrapping in an array of gold nanoparticles (NPs) at the SiO2/pentacene interface to design a SYNAPSTOR (synapse transistor) mimicking the dynamic plasticity of a biological synapse. This device (memristor-like) mimics short-term plasticity (STP)   and temporal correlation plasticity (STDP, spike-timing dependent plasticity), two "functions" at the basis of learning processes. A compact model was developed, and these organic synapstors were used to  demonstrate an associative memory, which can be trained to present a pavlovian response. A recent report showed that these organic synapse-transistors (synapstor) are working at 1 volt and with a plasticity typical response time in the range 100-200 ms. The device also works in contact with an electrolyte (EGOS : electrolyte gated organic synapstor) and can be interfaced with biologic neurons. 

The recent creation of this novel transistor gives prospects to better recreation of certain types of human cognitive processes, such as recognition and image processing.  When the NOMFET is used in a neuromorphic circuit it is able to replicate the functionality of plasticity that previously required groups of several transistors to emulate and thus continue to decrease the size of the processor that would be attempting to utilize the computational advantages of a pseudo-synaptic operation. (See Moore's Law)

See also 

Artificial intelligence
Organic field-effect transistor

References 

Transistor types
Computer storage devices
Molecular electronics
Organic electronics
Seattle Monolith. On New Year's Day 2001, a replica of the Monolith from 2001: A Space Odyssey appeared on Kite Hill in Seattle's Magnuson Park.  The Seattle Monolith was a guerrilla art installation by a group of Seattle artists calling themselves "Some People."

Timeline

Construction
The Monolith was fabricated by Louie Raffloer at Seattle's Black Dog Forge. It was a hollow structure measuring , the same proportions as the  Monoliths of the "Space Odyssey" series. It was constructed of 16 gauge steel and L-beams. Rebar protruded from the bottom to attach the Monolith to its foundation. Estimates on the weight ranged from . The foundation, consisting of 4 steel tubes connected by rebar, was buried in the ground and embedded in concrete. When the Monolith was erected, quick set epoxy was poured into the tubes and the rebar on the bottom of the Monolith was inserted into the tubes.

Funding
The overall cost for constructing the Monolith was approximately $250. The majority of the money for the Monolith was raised at the "Apes Of Wrath" Mexican Wrestling Party at Rocket Science Studios on Seattle's Westlake Avenue. Additional money was raised through the sale of "I Support the Monolith" T-shirts, an unsanctioned sidewalk bake sale on Broadway, a private screening of 2001: A Space Odyssey and a benefit concert held at The Speakeasy Café in Belltown.

"Some People" 
Initially, the artists creating the Monolith had the idea that the public would never know where the Monolith came from or who constructed it. That changed after the Monolith was removed from the park and found on Duck Island. Artist Caleb Schaber came forward as a spokesperson for Monolith announcing a group of artists named "Some People" were responsible for the art. Schaber later had a duplicate of the Monolith made for himself and in April, 2001, ran for Mayor of Seattle.

No other information was known about "Some People" until two years later when the Seattle Times ran an article about the Monolith's journey around the city. Chris Lodwig finally admitted to reporter Tyrone Beason that he, Titus Grupp and Eric Leuschner had the initial idea for the project and that about 50 other people were involved.

See also

References

2001 establishments in Washington (state)
2001 sculptures
Guerilla art and hacking art
Monoliths
Outdoor sculptures in Seattle
Steel sculptures in Washington (state)
Consorcio ARA. Consorcio ARA is a Mexico-based construction company specialized in the construction, maintenance and commercialization of low-income, affordable entry-level, middle-income and residential buildings. In addition, ARA is engaged in real estate developments, such as shopping centers and golf courses.

The company also operates 20 concrete production plants for its own use.

Headquartered in Mexico City, ARA operated offices in New York and C

hicago in the United States.  The US offices were closed as of September 2010.

References 

 

Companies based in Mexico City
Real estate companies of Mexico
Quinze & Milan. Quinze & Milan Designers is a Belgian cult design label of designer furniture founded by Belgian conceptual artist Arne Quinze and Yves Milan, who has since left the company, in 1999.

Products
The company's basic product range consists of pieces for use in public areas, homes and offices.

In 1999, Primary Pouf 01, a block of brightly colored polyurethane foam on legs, kicked off the use of coated foam. The label nowadays features as well various collections in wood, fabrics, steel, PE and concrete.

Since 2020, SDC Lab is the exclusive licensee of the Quinze & Milan brand and collection.

References

External links
Quinze & Milan official site 
SDC Lab official site

Belgian brands
Belgian furniture designers
Manufacturing companies established in 1999
Privately held companies of Belgium
Furniture companies of Belgium
Companies based in West Flanders
1999 establishments in Belgium
Rankine Lecture. The Rankine lecture is an annual lecture organised by the British Geotechnical Association named after William John Macquorn Rankine, an early contributor to the theory of soil mechanics.

This should not be confused with the biennial BGA Géotechnique Lecture.

The Rankine Lecture is held in March each year. In even-numbered years, the lecturer is from the UK. In odd-numbered years, the lecturer is from outside the UK. Each lecture is usually published in Géotechnique.

List of Rankine Lecturers

See also

 Named lectures
 Géotechnique Lecture

External links
 ICE Virtual Library - The Rankine Lecture
 British Geotechnical Association - List of Rankine Lecturers
 British Geotechnical Association

References

Geotechnical engineering
Science events in the United Kingdom
Science lecture series
1961 establishments in the United Kingdom
Recurring events established in 1961
British lecture series
Henry Bovey. Henry Taylor Bovey, LLD, DCL, FRS (1852 – 2 February 1912) was an engineering science academic. He was the first Rector of Imperial College of Science and Technology in London.

Early life
Henry Bovey was born in 1852 in Devon. He was educated at Queens' College, Cambridge, where he graduated BA (as 12th Wrangler) in 1873. He was subsequently elected a Fellow of the college.

Career
Bovey joined the staff of the Mersey Docks and Harbour Board in Liverpool and became an assistant engineer. He trained with Sir George Fosbery Lyster in the area of structures.

In 1877, Bovey took up the position of professor of civil engineering and applied mechanics at McGill University in Montreal, Quebec, Canada, where using his administrative skills he developed the Engineering Faculty.

Bovey was offered the position of Rector of Imperial College in 1907, although his health was failing by this time. The appointment was confirmed in May 1908 but his bad health meant that he had to resign the position at the end of 1909.
In 1912, he died in Eastbourne.

Henry Bovey was a founder member of the Canadian Society of Civil Engineers and the Liverpool Society of Civil Engineers. He was elected a Fellow of the Royal Society (FRS) in June 1902, and was a Fellow of the Royal Society of Canada.

Death
Bovey died on 2 February 1912 at Eastbourne, England.

Books
 Applied mechanics, 1882.
 A treatise on hydraulics. New York: J. Wiley; London: Chapman & Hall, 1899, c1895.

References

1852 births
1912 deaths
Engineers from Devon
Alumni of Queens' College, Cambridge
Fellows of Queens' College, Cambridge
Engineering academics
British civil engineers
Canadian civil engineers
British mechanical engineers
Academic staff of McGill University
Fellows of the Royal Society of Canada
Rectors of Imperial College London
Fellows of the Royal Society
Canadian mechanical engineers
20th-century British engineers
19th-century British engineers
David A. Nethercot. David Arthur Nethercot (born 26 April 1946) is a British structural engineer.

He was the Head of the Civil Engineering Department at Imperial College London until September 2011. He was president of the Institution of Structural Engineers (IStructE) in 2003-04 and the 2009 recipient of their Gold Medal.

In June 2012 he became President of the City & Guilds College Association, the association for engineering alumni of Imperial College. 1 November 2013 he became President of the International Association for Bridge and Structural Engineering (IABSE).

See also
 Imperial College Civil & Environmental Engineering

References

External links
 Imperial College's page
 City & Guilds College Association

Fellows of the Royal Academy of Engineering
Academics of Imperial College London
Engineering educators
Living people
Presidents of the Institution of Structural Engineers
British structural engineers
Officers of the Order of the British Empire
IStructE Gold Medal winners
Fellows of the Australian Academy of Technological Sciences and Engineering
Year of birth missing (living people)
Alumni of Cardiff University
Alan W. Bishop. Alan Wilfred Bishop (27 May 1920 – 30 June 1988) was a British geotechnical engineer and academic, working at Imperial College London.

He was known for the Bishop's method of analysing soil slopes. After his graduation from Emmanuel College, Cambridge, Bishop worked under Alec Skempton and obtained his PhD in 1952 with his thesis title being: The stability of earth dams. He worked extensively in the field of experimental Soil mechanics and developed apparati for soil testing, such as the triaxial test and the ring shear.

His contribution to the science was widely acknowledged and he was invited in 1966 to deliver the 6th Rankine Lecture of the British Geotechnical Association titled: The strength of soils as engineering materials.

Nowadays, a part of the Soil Mechanics Laboratories at Imperial College is named after him in recognition of his long-time work at the College.

See also
 Department of Civil and Environmental Engineering, Imperial College London
 Slope stability analysis

References

External links
 Obituary 
 The Skempton and Bishop Archives 

1920 births
1988 deaths
Academics of Imperial College London
Fellows of the Royal Academy of Engineering
Geotechnical engineers
Alumni of Imperial College London
Alumni of Emmanuel College, Cambridge
English civil engineers
People from Whitstable
Aluminium carbonate. Aluminium carbonate (Al2(CO3)3), is a carbonate of aluminium. It is not well characterized; one authority says that simple carbonates of aluminium are not known. However related compounds are known, such as the basic sodium aluminium carbonate mineral dawsonite (NaAlCO3(OH)2) and hydrated basic aluminium carbonate minerals scarbroite (Al5(CO3)(OH)13•5(H2O)) and hydroscarbroite (Al14(CO3)3(OH)36•nH2O).

Preparation
For many years there was no evidence for the existence of any carbonate-containing ternary Al-C-O phase, i.e., , however in 2023  and  (dialuminium carbonate pyrocarbonate) were produced with a carbon dioxide pressure of 24 and 38 GPa. This means that the Earth's mantle may contain aluminium carbonate minerals.

Some minerals contain both aluminium and carbonate.  Dawsonite has the formula NaAlCO3(OH)2. Hydrotalcites, both synthetic and natural, are layered metal hydroxides comprised in part of aluminium and carbonate.

Surface carbonate species readily form upon exposure of aluminium oxide to .

Uses
Aluminium carbonate, along with aluminium hydroxide and aluminium oxide, is a phosphate-binding drug that is sometimes administered to dogs and cats to bind intestinal phosphate and prevent the absorption of dietary phosphate as well as to decrease absorption of phosphate excreted by the pancreas.  It is seldom used in humans because of concerns with toxicity, but cats and dogs do not appear to have a toxic response to its presence.

The reaction of aluminium sulfate and sodium bicarbonate forms carbon dioxide and aluminium hydroxide which stabilises the formation of a foam. This reaction was the basis of an early fire extinguisher invented by Aleksandr Loran in 1904.

References 

Aluminium compounds
Carbonates