omniomni/omni-engineering huggingface dataset:
Normal contact stiffness. Normal contact stiffness is a physical quantity related to the generalized force displacement behavior of rough surfaces in contact with a rigid body or a second similar rough surface.  Specifically it is the amount of force per unit displacement required to compress an elastic object in the contact region. Rough surfaces can be considered as consisting of large numbers of asperities. As two solid bodies of the same material approach one another, the asperities interact, and they transition from conditions of non-contact to homogeneous bulk behaviour, with changes in the contact area. The varying values of stiffness and true contact area at an interface during this transition are dependent on the conditions of applied pressure and are of importance for the study of systems involving the physical interactions of multiple bodies including granular matter, electrode contacts, and thermal contacts, where the interface-localized structures govern overall system performance by controlling the transmission of force, heat, charge carriers or matter through the interface.

References

Surfaces
Tribology
Mechanics
Friction
Classical mechanics
Force
Caatinga Ecological Corridor. The Caatinga Ecological Corridor () is an ecological corridor in the caatinga biome of northeast Brazil.

History

The decree creating the Caatinga Ecological Corridor was signed on 28 April 2006 by the Minister of the Environment, Marina Silva.
The ordnance was published on 4 May 2006.
It was the second officially recognized ecological corridor, the first being the Capivara-Confusões Ecological Corridor, created in March 2006.
The corridor covers about  of caatinga.
It is designed to interconnect eight conservation units and 40 municipalities in the states of Pernambuco, Bahia, Sergipe, Alagoas and Piauí. It excludes urban areas.

The Brazilian Institute of Environment and Renewable Natural Resources (IBAMA) is responsible for management.
It was expected that all municipalities would be subject to government regulations to conserve biodiversity and promote sustainable development, including replanting degraded areas.
Priority areas for conservation, sustainable use and sharing of the benefits of biodiversity are Angical, Aiuaba, Betânia, Curaçá, Gararu/Belo Monte, Mirandiba, Paus Brancos (Quixeramobim), Queimada Nova, Remanso, Serra Negra, western Pernambuco, Petrolina, Raso da Catarina, Rodelas, Serra Talhada and Monte Alegre.

Conservation units

Conservation units in the corridor when created were the Catimbau National Park, Serra Negra Biological Reserve, Raso da Catarina Ecological Station, Serra Branca / Raso da Catarina Environmental Protection Area,  Cocorobó Area of Relevant Ecological Interest, Lagoa do Frio Municipal Nature Park, Cantidiano Valqueiro Barros Private Natural Heritage Reserve and Maurício Dantas Private Natural Heritage Ecological Reserve.
It also included their buffer zones, interstices and areas to be created later.

Notes

Sources

Ecological corridors of Brazil
2006 establishments in Brazil
Protected areas of Pernambuco
Protected areas of Bahia
Protected areas of Sergipe
Protected areas of Alagoas 
Protected areas of Piauí
Morris Goodkind. Morris Goodkind (1888 – September 5, 1968) was chief bridge engineer for the New Jersey State Highway Department from 1925 to 1955 (now New Jersey Department of Transportation), and was responsible for the construction of numerous bridges during that period. Goodkind emphasized the integration of architecture and aesthetics in bridge design and received awards from the American Society of Civil Engineers and the American Institute of Steel Construction for his designs.

Goodkind was a graduate of Columbia University. He worked for the New York City Public Service Commission in the development of the subway system before working on bridge designs for engineering firms and Mercer County, New Jersey. He joined the New Jersey Highway Department in 1922, and was its Chief Bridge Engineer from 1925–1955, after which he retired to private practice.

Morris Goodkind designed the northbound span of the bridge that crosses the Raritan River at Route 1, completed in 1929, and now known as the Morris Goodkind Memorial Bridge. His son Donald Goodkind (1922–2013) was an architect and engineer who became assistant commissioner for highways of the New Jersey Department of Transportation. Donald Goodkind designed the southbound span of the bridge that crosses the Raritan River at Route 1, built in 1974, and now known as the Donald Goodkind Bridge.

Works associated with Goodkind 
 Pulaski Skyway
 Donald and Morris Goodkind Bridges
 Edison Bridge (New Jersey)
 Lincoln Highway Passaic River Bridge
 Basilone Memorial Bridge
 Bridges along the Burma Road
 Bridges along the Garden State Parkway
 Shark River Bridge
 Cheesequake Creek Bridge
 Absecon Boulevard Bridge
 Perth Amboy Bypass – NJ Route 35 Extension
 Route 46 Hackensack River Bridge
 Route 46 Passaic River Bridge

See also 
 Gilmore David Clarke
 William A. Stickel
 List of crossings of the Hackensack River
 List of crossings of the Lower Passaic River
 List of crossings of the Upper Passaic River
 List of crossings of the Raritan River
 List of bridges, tunnels, and cuts in Hudson County, New Jersey
 List of bridges documented by the Historic American Engineering Record in New Jersey
 List of bridges on the National Register of Historic Places in New Jersey

References 

1888 births
1968 deaths
Engineers from New Jersey
American bridge engineers
People from New Brunswick, New Jersey
Columbia School of Engineering and Applied Science alumni
Catalina 309. The Catalina 309 is an American sailboat, that was designed by Gerry Douglas and first built in 2005.

Production
The boat was built by Catalina Yachts in the United States starting in 2005, but is now out of production.

Design

The Catalina 309 is a small recreational keelboat, built predominantly of fiberglass. It has a fractional sloop rig, an internally-mounted spade-type rudder and a fixed fin keel. It displaces  and carries  of ballast.

The boat has a draft of  with the standard keel and  with the optional shoal draft wing keel.

The boat is fitted with a Japanese Yanmar 3YM20 diesel engine of . The fuel tank holds  and the fresh water tank has a capacity of .

The design has a hull speed of .

Operational history
The design was named a Boat of the Year winner by Cruising World magazine for 2007, including "top overall Domestic Boat of the Year award".

See also

List of sailing boat types

Similar sailboats
Alberg 30
Alberg Odyssey 30
Aloha 30
Annie 30
Bahama 30
Bristol 29.9
C&C 1/2 Ton
C&C 30
C&C 30 Redwing
CS 30
Grampian 30
Hunter 30
Hunter 30T
Hunter 30-2
Hunter 306
J/30
Kirby 30
Leigh 30
Mirage 30
Mirage 30 SX
Nonsuch 30
Pearson 303
Tanzer 31

References

External links

Keelboats
2000s sailboat type designs
Sailing yachts
Sailboat types built by Catalina Yachts
Sailboat type designs by Gerry Douglas
Molybdenum carbide. Molybdenum carbide is an extremely hard, refractory, ceramic material, commercially used in tool bits for cutting tools.

There are at least three reported phases of molybdenum carbide: γ-MoC, β-Mo2C, and  γ'. The γ phase is structurally identical to tungsten carbide.

β-Mo2C has been suggested as a catalyst for carbon dioxide hydrogenation. The γ' phase forms by combining the elements at relatively low temperatures, and transforms to the γ phase at 800 °C.

References

Carbides
Molybdenum compounds
Superhard materials
Refractory materials
AlGa. AlGa (Aluminum-Gallium) is a  that results from liquid gallium infiltrating the crystal structure of aluminium metal. The resulting alloy is very weak and brittle, being broken under the most minute pressure. The alloy is also chemically weaker, as the gallium inhibits the aluminum from forming a protective oxide layer. A video of gallium metal causing intergrain corrosion and breaking of aluminum can be found here.

Uses
The alloy can be reacted with water to form hydrogen gas(H2), aluminum hydroxide and gallium metal. Normally, aluminum does not react with water, since it quickly reacts in air to form a passivation layer of aluminum oxide. AlGa alloy is able to create aluminum nanoparticles for the hydrogen producing reaction. Since this reaction forms hydrogen gas, it can be used as a source of fuel or simply as a hydrogen gas generator. This reaction can also be used to produce aluminum oxide from aluminum. As previously mentioned, aluminum normally won't react with water or air due to the presence of a protective passivation layer, but the reaction of suspended aluminum with water can effectively oxidize aluminum to form aluminum hydroxide which can then be heated to about 180 °C (356 °F), where it decomposes to produce aluminum oxide, and water vapor.

Safety concerns

Due to AlGa's extreme lack of structural integrity and inability to form a protective oxide layer, gallium metal is considered to be corrosive. If AlGa were to form on an aluminum structure, the aforementioned structure could weaken or collapse. Gallium is subject to strict packaging requirements for transportation by aircraft as it could compromise the integrity of the aluminum hull.

References

Aluminium alloys
Gallium alloys
Isis Anchalee. Isis Anchalee is a Canadian full-stack engineer.

Biography
Anchalee was born in 1993, and began teaching herself how to code in 2013. She was employed by OneLogin, Uber, and later Hustle, where she worked as a software engineer on its product team. She is also the founder of the #ilooklikeanengineer hashtag created in order to promote discussion of gender equality in tech after the OneLogin featured her face in an ad campaign. She has also given multiple talks, such as at Tech Inclusion New York in 2017 and at GHC15 in 2015. Anchalee is also on the Advisory Board of Women Who Code. Following being let go from Hustle, she started traveling the world and currently writes the blog Making Love With Life.

Creation of I Look Like An Engineer

Hashtag 
Anchalee created #ilooklikeanengineer (an example of hashtag activism) when she received derogatory comments about her face being featured in an ad campaign for OneLogin.  Anchalee feels that most people are "...well intentioned but genuinely blind to a lot of [things] that those who do not identify as male have to deal with." The hashtag took off. In the first two months of it was used in 19,354 original tweets and 29,529 retweets One year after the launch of #ilooklikeanengineer 250,000 plus people had used the hashtag. Both her hashtag and the accompanying Medium post about her experiences received a lot of media coverage and her work was highlighted by celebrities such as Chelsea Clinton and Emma Watson. Her hashtag has been adapted for use in other professions not usually thought of as diverse (such as #ilooklikeasurgeon) and along with other organizations, such as Girls Who Code and Women Who Code, has led to more societal awareness of the diversity in the field of computing.

Facebook 
Her Facebook account was suspended due to similarities between her given name and the terrorist group ISIS, but her account was later reactivated.

References

Canadian women engineers
Gender equality
Canadian software engineers
21st-century Canadian women engineers
Living people
1993 births
IBM System/360 Model 85. The IBM System/360 Model 85 is a high-end member of the System/360 family of computers, with many advanced features, and was announced in January 1968 and first shipped in December 1969. IBM built only about 30 360/85 systems because of "a recession in progress".

Models
The four models of the 360/85 are: I85 (512K), J85 (1M), K85 (2M) and L85 (4M), configured with two IBM 2365 Processor Storage units, four 2365 units, an IBM 2385 Processor Storage unit Model 1 (=2M), or an IBM 2385 Processor Storage unit Model 2 (=4M) respectively. The I85 includes two-way interleaved memory while the others provide four-way interleaving of memory access.

Advanced/special features
  The system console is L-shaped: one leg is the Main Control Panel, including a CRT, and the other leg includes 2 screens: "Microfiche Document Viewer" and "Indicator Viewer."
  CPU cache, which IBM termed "high-speed buffer storage" - depending on the model and the situation, "the effective system storage cycle becomes one-third to one-fourth of the actual main storage cycle."  The cache is high-speed, static buffer memory situated between the CPU and main system memory ("Level 1" cache), available in 16 KB and 32 KB size options. The System/360 Model 85 is the first commercially available computer with cache memory. 
 Monolithic integrated circuits
  Enhanced floating point - The Model 85 comes with extended-precision 128-bit quadruple-precision floating point
  The Model 85 has both Read-only and Writeable Control Storage (it is the second System/360 to have writeable control storage; the IBM System/360 Model 25 is the first to have rewriteable control storage; the 360/85 was introduced Jan. 30, 1968).

Emulation

The 360/85, when equipped with the 709/7090/7094 Compatibility Feature,
with the use of an emulator program permits running 709, 7040, 7044, 7094 and 7094 II programs.

Gateway to the future
In some respects, the System/360 Model 85 provided a glimpse into the future System/370 product line (particularly the IBM System/370 Model 165) - which IBM announced two years later (1970).  It used the MST circuitry that was later used in the initial System/370 models, and introduced features such as 128-bit floating point arithmetic and block multiplexor channels that are also part of the System/370 architecture.

The 360/85 uses microcode to control instruction execution, unlike the completely-hardwired 360/75 and 360/91; the high-end models of System/370 also use horizontal microcode, except the IBM System/370 Model 195.

References

System/360 Model 85
Internationales Luftfahrt-Museum. The Internationales Luftfahrt-Museum (Manfred Pflumm) is an aviation museum located in the German town of Villingen-Schwenningen in Baden-Württemberg. Many aerospace exhibits are on display including fixed-wing aircraft, helicopters and aircraft engines. The main display is contained within one hangar with other aircraft displayed externally on a site covering 13,000 square metres. In addition to the aircraft exhibits a number of aircraft components and a collection of ejection seats are also held by the museum.

Aircraft on display
The museum has over 50 aircraft on display and a collection of 350 model aircraft.

Piston engine aircraft

Antonov An-2
Aero L-60 Brigadýr
Braunschweig LF-1 Zaunkönig
CP.301S Smaragd 
Dornier Do 27
Dornier Do 335
Fischer Brause
Focke-Wulf FWP-149D
Fokker E.III
Fokker Dr.I
Hirth Acrostar
Vogt Lo.120S
Yakovlev Yak-18T
Zlin Z-37A Cmelak

Jet aircraft

Armstrong Whitworth Sea Hawk
Canadair Sabre
Dassault/Dornier Alpha Jet
de Havilland Vampire
English Electric Canberra
Fiat G.91
Lockheed T-33
Lockheed F-104G Starfighter
Mikoyan-Gurevich MiG-15
Mikoyan-Gurevich MiG-21

Gliders
Akaflieg Stuttgart FS-26 Moseppl motor glider
DFS SG 38 Schulgleiter
Fauvel AV.36
Neukom Elfe
Raab Doppelraab
Schneider Grunau Baby
Schleicher Ka 6

Helicopters
Aerospatiale Alouette II
MBB Bo 105
Saro Skeeter

Aircraft engines

Piston engines
Elizalde Tigre
Shvetsov ASh-62

Gas turbine engines
de Havilland Ghost

See also
List of aerospace museums

References
Notes

External links

 

Internationales Luftfahrt-Museum
Internationales Luftfahrt-Museum
Museums established in 1988
Internationales Luftfahrt-Museum
Villingen-Schwenningen
Buildings and structures in Schwarzwald-Baar-Kreis
FMC Electronic Technical School. FMC Electronic Technical School () is a private Catholic technical school located in Santa Rita do Sapucai, Minas Gerais, Brazil. Founded in 1959 by "Dona" Moreira and placed under the direction of the Society of Jesus,  FMC ETE was the first school of electronics in Latin America, giving rise to Brazil's Electronics Valley.

History
"Dona" Sinha Moreira (Luzia Rennó Moreira, 1907–1963) envisioned a better future for the people in the rural area of her birth, Santa Rita do Sapucai. During world travels with her diplomat husband she was impressed by the technology of the time in Japan. In 1959 she founded the first school of electronics in Latin America, the Francisco Moreira da Costa Electronics Technical School, named for her father. It gave rise to Electronics Valley. This gradually transformed the local culture from agrarian to an electronics and information technology center.

Moreira died soon after construction began on the school. She left the school board in the hands of the Jesuits.

See also

 List of Jesuit educational institutions
 Education in Brazil
 List of schools in Brazil

References  

Jesuit secondary schools in Brazil
Educational institutions established in 1959
1959 establishments in Brazil
Gerhard Neumann Museum. The Gerhard Neumann Museum is an aviation museum located in the German village of Niederalteich in Bavaria. The museum chronicles the work of German aero engine designer Gerhard Neumann, in particular the General Electric J79 turbojet and Lockheed F-104 Starfighter which this engine powered. Many aerospace exhibits are on display including fixed-wing aircraft and aircraft engines.

Aircraft on display
The museum has four examples of the Lockheed F-104, a Mikoyan-Gurevich MiG-21 and fuselage sections of other aircraft types.

Jet aircraft
Airbus A300 (fuselage section)
Eurofighter Typhoon (fuselage section)
Lockheed F-104G Starfighter, four airframes.
Hamburger Flugzeugbau HFB-320 Hansa Jet
MBB Lampyridae
Mikoyan-Gurevich MiG-21
Panavia Tornado (fuselage section)

Aircraft engines

Gas turbine engines
General Electric J79

See also
List of aerospace museums

References
Notes

External links

Official website.

Aerospace museums in Germany
Museums in Bavaria
Museums established in 2000
2000 establishments in Germany
Jillson Mills. The Jillson Mills (Officially known as the Willimantic Linen Company Mill Complex) is a mill complex in Willimantic, Connecticut. The mills produced cotton thread throughout the lifespan of the operation of the mill.

History 
The mill was first built in 1824 in the same style as the current one by William Asa and Seth Jillson. In 1854 the old mill was purchased by investors from Hartford. They ended up forming the Willimantic Linen Company, even though they never produced linen. The company ended up rebuilding the mill in 1880 to near its current state. The last mill built on the complex was built in 1910. The mill ended up under control by the American Thread Company in 1898 due to the merger of the previous ownership of the mill. The mill was closed in 1985 due to the company moving operations to the South.

Current status 
Mill #4 burned down in 1995 due to a fire caused by local children. The wooden swing bridge connecting the mills was closed permanently shortly thereafter. The mills lay dormant until the former grounds started to be purchased for commercial and residential purposes. ArtSpace currently has its Windham apartments located in this complex. The old chimney was demolished between 2012 and 2014.

Garden on the Bridge 

The Garden on the Bridge is located in the complex of the former mills. It is a stone arch bridge built in 1857, that formerly was used for automobile until the Frog Bridge was opened in 2000. It is currently a pedestrian bridge with flora all over, giving the bridge a natural look. The bridge was temporarily closed until 2006 when it was reopened for its current purpose.

National Register of Historic Places 
The complex was added to the National Register of Historic Places on July 30, 2014, along with other historic mills across the section of the state. This makes it the one of 22 on the list in the town of Windham.

See also 
 National Register of Historic Places listings in Windham County, Connecticut — Documenting the NRHP addition of the mill.
 Windham Textile and History Museum — The museum nearby documenting about the mill's history.
 Willimantic Footbridge — The footbridge nearby built for employees for a safe route to the other side of the river.
 Willimantic Freight House and Office — Old place to ship freight coming from the mill.

References

External links 

 
 
 

Willimantic, Connecticut
Mill museums in the United States
Stone arch bridges in the United States
National Register of Historic Places in Windham County, Connecticut
Stratum (sculpture). Stratum, also known as the "Stratum Project", is a series of 23 sculptures by landscape architect Mikyoung Kim, installed near Portland, Oregon's Sellwood Bridge, in the United States.

Description
Stratum is a public art installation consisting of 23 multicolored sculptures, or "ecologically inspired geological totems", along the east approach to the Sellwood Bridge in southeast Portland's Sellwood neighborhood. The totems are  tall and made of layered recycled materials intended to "create a surface representing earth, water and sky as a gateway to the Sellwood community". They "rotate" at 90-degree angles. According to the Regional Arts & Culture Council, the project's concept was "driven by the power and beauty of the geologic and natural phenomena" of the Willamette Valley. It was funded by the City of Portland's art program. The sculptures are owned by the city and maintained by the Regional Arts & Culture Council.

History
Mikyoung Kim's work was selected by the Regional Arts & Culture Council in 2012. The totems were created by Art & Design Works of Cornelius.

Workers began installing the totems in August 2016, starting on the south side of Southeast Tacoma Street. The remaining sculptures are slated to be installed on the north side of Tacoma Street by the end of 2016.

See also

 2016 in art

References

External links
 Sellwood Bridge Gateway: Stratum Project at Mikyoung Kim Design

2016 establishments in Oregon
2016 sculptures
Outdoor sculptures in Southeast Portland, Oregon
Sculpture series
Sellwood-Moreland, Portland, Oregon
Totem poles in the United States
Flex sensor. A flex sensor or bend sensor is a sensor that measures the amount of deflection or bending. Usually, the sensor is stuck to the surface, and resistance of sensor element is varied by bending the surface. Since the resistance is directly proportional to the amount of bend it is used as goniometer, and often called flexible potentiometer.

Types of flex sensor
Conductive ink based flex sensor
Fibre optic flex sensor
Capacitive flex sensor
 Velostat flex sensor (popular among hobbyists)

Applications
Flex sensors are used in wide areas of research from computer interfaces, rehabilitation, security systems and even music interfaces. It is also famous among students and hobbyists.

Human Machine Interface devices 
A dataglove is a human-computer interaction device that is made possible by flex sensors. Deflections of a dataglove are measured via its flex sensors embedded in the glove.

Rehabilitation Research 
In rehabilitation research, wired gloves or datagloves are used to record joint movement.

Security Systems 
Movement of doors is monitored by placing the sensor at the hinge. Also, damage to metal structures can be identified using the sensor.

References

 

Sensors