omniomni/omni-engineering huggingface dataset:
Simplicity Manufacturing Company. Simplicity Manufacturing Company is an American company based in Port Washington, Wisconsin that builds lawn and garden equipment under various brands.  The company was founded by William J. Niederkorn in 1922, and started building walk-behind two-wheeled tractors in 1939.  Between 1941 and 1945, due to World War II, Simplicity Manufacturing temporarily halted production of lawn and garden products, and manufactured electric fence controllers and external surface grinders to satisfy the War Production Board. Simplicity built is first riding tractor in 1957 which was the model  Wonderboy. The company rapidly expanded its product line in the sixties to meet the demands of the population shift to American suburbs. Allis-Chalmers purchased the company in 1965, and Simplicity's management bought it back in 1983.  Simplicity Manufacturing celebrated its 75th anniversary in 1997 with a special 75th anniversary tractor model. The tractor featured a special blue paint scheme with chrome Harley-Davidson lights and muffler.

Sometime after AGCO Corporation purchased Deutz-Allis from Deutz-Fahr and KHD, Simplicity took over building and selling the Deutz-Allis lawn equipment.  The name was later changed to Agco-Allis, and then to AGCO to reflect the changes within the AGCO Corporation.

After AGCO purchased Massey Ferguson, Simplicity began building and selling the Massey Ferguson lawn equipment. Simplicity bought the Snapper company in 2002. Snapper had built Massey Ferguson lawn tractors many years before.

Over the years, Simplicity has also built lawn and garden tractors for J.C. Penney, Montgomery Ward, Viking (part of Stihl), Homelite Corporation and Rapid.  Hinomoto/Toyosha built some of the larger compact tractors sold as Simplicity, Deutz-Allis and Allis-Chalmers.

 1989, purchased the Middlesworth company of Greentown, Indiana, a manufacturer of zero-turn mowers
 2000 Simplicity announced that it had agreed to purchase Ferris Industries
 2000 purchased Giant-Vac
 2002, purchased the Snapper company
 2004, was purchased by Briggs & Stratton

References

External links
 Official website
 Fast Company: The Man Who Said No to Wal-Mart

Lawn and garden tractors
Manufacturing companies based in Wisconsin
Agriculture companies of the United States
UMLet. UMLet is an open-source Java-based UML tool designed for teaching the Unified Modeling Language and for quickly creating UML diagrams.  It is a drawing tool rather than a modelling tool as there is no underlying dictionary or directory of reusable design objects. UMLet is distributed under the GNU General Public License.

UMLet has a simple user interface that uses text-formatting codes to modify the basic shapes with decorations and annotations, so there is no forest of icons or parameter list dialogs in the user's way. This does require the user to learn yet another text markup language, but the effort is small and the markup obvious to the experienced UML designer.

UMLet can export diagrams to pictures (eps, jpg), drawing formats (SVG), document formats (PDF). The clipboard can be used to copy-paste diagrams as pictures into other applications. It is possible to create custom UML elements.

The basic drawing objects can be modified and used as templates which allows users to customize the app to their needs. This requires programming of the elements in Java.

The most important UML diagram types are supported: class, use case, sequence, state, deployment, activity.
Support for UML 2.0 features is not yet available, though the customization feature could be used to do this. It supports concepts like Martin Fowler's UmlAsSketch. Its design goals are described in the paper "Flyweight UML Modelling Tool for Software Development". Another paper compares UMLet to Rational Rose.

The app's native file format is UXF, an extension of XML intended for exchanging UML models.

UMLet runs stand-alone or as Eclipse plug-in on Windows, OS X and Linux.

Releases
version 15.0: Web: zoom, lasso, export, dark mode; hi-res export; startup
version 14.3: Improved OS integration, improved Eclipse integration, XML security fix, many additional fixes
version 14.1.1: New custom elements, new sequence all-in-one, bug fixes
version 13.3: opaque elements, bug fixes
version 13.2: improved relations
version 13.1: bug fixes
version 13.0: internal refactoring, context-sensitive-help
version 11.3: modified security manager behaviour, new options, batch mode improved, new relation types
version 11.2: word wrap for custom elements, improved anti-aliasing, better Eclipse support
version 11.1: stability fixes
version 11.0: list of recently opened files, drag and drop of uxf-files, updated file format
version 10.4: palette drag and drop, enhanced clipboard and improved keyboard support
version 10.3: updates to the user interface

Limitations
No direct support for templates (parameterised classes) nor design patterns, though both can be shown with workarounds
No code generation - this is a design choice to keep the drawing tool fast and light.

See also
List of UML tools
UXF UML eXchange Format for exchanging UML designs as files.

References

External links
UMLet website
UMLet on Eclipse Marketplace

Free UML tools
George England and Co.. George England and Co. was an early English manufacturer of steam locomotives founded by the engineer George England of Newcastle upon Tyne (1811–1878). The company operated from the Hatcham Iron Works in New Cross, Surrey, and began building locomotives in 1848.

The company supplied one of the earliest tank locomotives to the contractors building the Newhaven, Sussex, branch line for the London Brighton and South Coast Railway and exhibited a design at The Great Exhibition in 1851. It also supplied locomotives to the Ffestiniog Railway, the Wantage Tramway, the Caledonian Railway, the London & Blackwall Railway, the Great Western Railway, the Somerset and Dorset Railway and the Victorian Railways amongst others.

Locomotive types

Festiniog Railway 0-4-0
The four locomotives supplied by England, in 1863/64, to the Festiniog Railway, were the first truly successful narrow gauge  engines built. Remarkably three of the four survive, much rebuilt, two still in full working order. The other, Princess, was for many years on display at Spooner's Bar in Porthmadog, although without its tender. It has since been restored cosmetically to a high standard, and has made appearances in London and elsewhere for publicity purposes.

Two more similar  engines, to an improved design, were built in 1867, one of which, Welsh Pony, survives, and bought back to steam on the 27th of June 2020. Having undergone a careful and sympathetic restoration by the Ffestiniog Railway.

Fairlie
In 1869, England built the famous Little Wonder, Fairlies Patent articulated locomotive, also for the Ffestiniog Railway.  George England's daughter, Eliza Anne, had earlier eloped with Robert Francis Fairlie, the inventor of the Fairlie locomotive. On George England's early retirement in 1869, Fairlie took over the company, in partnership with England's son George England junior, renaming it the Fairlie Engine and Steam Carriage Company, but following the death of George England Jr., in July 1870, the works were sold.

Victoria, Australia
 - Victorian Railways No.1 (1857)
 - Victorian Railways V class (1857)
 - Melbourne and Suburban Railway Company 2-4-0T (1860)
 - Victorian Railways L class (1859)

Preservation
 Wantage Tramway, Shannon, 0-4-0WT, preserved at Didcot Railway Centre
 Ffestiniog Railway, see: Ffestiniog Railway rolling stock

Notes and references

England
Ffestiniog Railway
AC/DC (disambiguation). AC/DC are an Australian hard rock band named after the two types of electrical mains power.

AC/DC or AC-DC can refer to any device that runs on alternating current (AC) and/or direct current (DC), two types of mains power. 

AC/DC may also refer to:

Electronics
 AC/DC converter, or rectifier, a device that converts AC to DC
 AC/DC motor, a type of electric motor that runs on AC or DC
 AC/DC receiver, broadcast receivers from the early days of radio and television that ran from AC or DC mains
 AC/DC supply, power supply
 The historical commercial Battle of Currents between distributors of AC or DC as mains power
 Power inverter, a device that converts DC to AC

Music
 AC/DC (video), by the Australian band AC/DC, 1989
 ACxDC, American hardcore punk band
 ACDC, a dance crew led by Adam G. Sevani and Jon M. Chu

Other uses
 AC/DC (pinball), a pinball machine designed after the band AC/DC
 "AC/DC" (Brooklyn Nine-Nine), a television episode
 AC/DC (slang), a slang term for bisexuality

See also

 
 
 ACDSee, a shareware image viewer program
 AC/DShe, an all-female AC/DC tribute band from San Francisco
 ACDC (disambiguation)
 AC (disambiguation)
 DC (disambiguation)
 Current wars (disambiguation), of the wars between AC and DC currents
BCDMH. 1-Bromo-3-chloro-5,5-dimethylhydantoin (BCDMH or bromochlorodimethylhydantoin) is a chemical structurally related to hydantoin. It is a white crystalline compound with a slight bromine and acetone odor and is insoluble in water, but soluble in acetone.

BCDMH is an excellent source of both chlorine and bromine as it reacts slowly with water releasing hypochlorous acid and hypobromous acid. It used as a chemical disinfectant for recreational water sanitation and drinking water purification. BCDMH works in the following manner:

The initial BCDMH reacts with water (R = Dimethylhydantoin):

 BrClR + 2 H2O → HOBr + HOCl + RH2

Hypobromous acid partially dissociates in water:

 HOBr → H+ + OBr−

Hypobromous acid oxidizes the substrate, itself being reduced to bromide:

 HOBr + Live pathogens → Br− + Dead pathogens

The bromide ions are oxidized with the hypochlorous acid that was formed from the initial BCDMH:

 Br− + HOCl → HOBr + Cl−

This produces more hypobromous acid; the hypochlorous acid itself act directly as a disinfectant in the process.

Preparation
This compound is prepared by first brominating, then chlorinating 5,5-dimethylhydantoin:

References

External links 
 PubChem Public Chemical Database (nih.gov)
 External MSDS

Disinfectants
Organobromides
Organochlorides
Hydantoins
Peripheral drift illusion. The peripheral drift illusion (PDI) refers to a motion illusion generated by the presentation of a sawtooth luminance grating in the visual periphery. This illusion was first described by Faubert and Herbert (1999), although a similar effect called the "escalator illusion" was reported by Fraser and Wilcox (1979). A variant of the PDI was created by Kitaoka Akiyoshi and Ashida (2003) who took the continuous sawtooth luminance change, and reversed the intermediate greys. Kitaoka has created numerous variants of the PDI, and one called "rotating snakes" has become very popular. The latter demonstration has kindled great interest in the PDI.

The illusion is easily seen when fixating off to the side of it, and then blinking as fast as possible. Most observers can see the illusion easily when reading text with the illusion figure in the periphery. The motion of such illusions is consistently perceived in a dark-to-light direction.

Two papers have been published examining the neural mechanisms involved in seeing the PDI (Backus & Oruç, 2005; Conway et al., 2005). Faubert and Herbert (1999) suggested the illusion was based on temporal differences in luminance processing producing a signal that tricks the motion system. Both of the articles from 2005 are broadly consistent with those ideas, although contrast appears to be an important factor (Backus & Oruç, 2005).

Rotating snakes

Rotating snakes is an optical illusion developed by Professor Akiyoshi Kitaoka in 2003. A type of peripheral drift illusion, the "snakes" consist of several bands of color which resemble coiled serpents. Although the image is static, the snakes appear to be moving in circles.  The speed of perceived motion depends on the frequency of microsaccadic eye movements (Alexander & Martinez-Conde, 2019).

Gallery

References

Inline citations

General references
Alexander, R. G., Martinez-Conde, S. (2019). Fixational eye movements. Eye Movement Research. Springer, Cham, 104–106, .
Backus, B. T., Oruç, İ. (2005). Illusory motion from change over time in the response to contrast and luminance. Journal of Vision, 5(11), 1055–1069, , .
Conway, B. R., Kitaoka, A., Yazdanbakhsh, A., Pack, C. C., Livingstone, M. S. (2005). Neural basis for a powerful static motion illusion. Journal of Neuroscience, 25, 5651–5656.
Faubert, J., Herbert, A. M. (1999). The peripheral drift illusion: A motion illusion in the visual periphery. Perception, 28, 617–622. 
Fraser, A., Wilcox, K. J. (1979). Perception of illusory movement. Nature, 281, 565–566.
Kitaoka. A., Ashida. H. (2003). Phenomenal characteristics of the peripheral drift illusion. Journal of Vision, 15, 261–262.

External links
Rotating snakes at Akiyoshi's illusion pages
Rotating rings at Sarcone's optical illusion pattern page
These patterns move, but it’s an illusion  by Smithsonian Research Lab
Does your pet see Peripheral drift? a slideshow designed for testing on animals

Optical illusions
Vision
Hypobromous acid. Hypobromous acid is an inorganic compound with chemical formula of . It is a weak, unstable acid. It is mainly produced and handled in an aqueous solution. It is generated both biologically and commercially as a disinfectant. Salts of hypobromite are rarely isolated as solids.

Synthesis and properties
Addition of bromine to water gives hypobromous acid and hydrobromic acid (HBr(aq)) via a disproportionation reaction.

  HOBr + HBr

In nature, hypobromous acid is produced by bromoperoxidases, which are enzymes that catalyze the oxidation of bromide with hydrogen peroxide:
  

Hypobromous acid has a pKa of 8.65 and is therefore only partially dissociated in water at pH 7. Like the acid, hypobromite salts are unstable and undergo a slow disproportionation reaction to yield the respective bromate and bromide salts.

Its chemical and physical properties are similar to those of other hypohalites.

Uses
HOBr is used as a bleach, an oxidizer, a deodorant, and a disinfectant, due to its ability to kill the cells of many pathogens. The compound is generated in warm-blooded vertebrate organisms especially by eosinophils, which produce it by the action of eosinophil peroxidase, an enzyme which preferentially uses bromide. Bromide is also used in hot tubs and spas as a germicidal agent, using the action of an oxidizing agent to generate hypobromite in a similar fashion to the peroxidase in eosinophils.
It is especially effective when used in combination with its congener, hypochlorous acid.

References

Hypobromites
Oxidizing acids
Halogen oxoacids
Triatomic molecules
Ralph Roberts (automotive designer). Ralph Roberts was an American automotive designer who worked for the Chrysler Corporation during the 1930s and 1940s.

LeBaron
Although a designer Roberts joined the founders of design practice LeBaron in 1921 to look after administration. The founders left but he remained in the practice which grew to manufacture car bodies and was taken over in 1927 by Briggs. Roberts moved to Briggs along with LeBaron.

Briggs Motor Bodies
Roberts spent much of the second half of the 1930s in England setting up the Briggs Manufacturing Company plant for the bodies for Ford Dagenham.

Glass fiber

Jack Wills of Pasadena California brought in Roberts and formed Wills and Roberts Manufacturing Company (WiRo or WilRo) in 1942 to make plastic housings for Aerojet and fiberglass droppable boats using one of the first polyester resins — Lamitex —and Owens-Corning Fiberglas. Postwar Roberts designed and built a clay model in 1946 for a fibreglass body later briefly made and sold as the Skorpion car.

References

American automobile designers
Chrysler designers
Year of birth missing
Year of death missing
Apple Media Tool. The Apple Media Tool was a multimedia authoring tool and associated programming environment sold by Apple in the late 1990s. It was primarily aimed at producing multimedia presentations for distribution on CD-ROM and was aimed at graphic designers who did not have programming experience. It featured an advanced user interface with an object-oriented user model that made production of rich and complex presentations easy. Its competitors were Macromedia Director, Quark Immedia, mTropolis, and Kaleida Labs ScriptX.

History 
The AMT system was developed by Patrick Soquet, a developer in Belgium working for Arborescence - a French company that was later acquired by Havas. From 1993 onwards it was marketed by Apple but all development was done by the independent team led by Soquet. In 1996, the development of the tool was taken over by Apple and the 2.1 version of the program was developed in-house by a team of engineers in California led by Dan Crow. In 1997 Apple decided to concentrate its multimedia offerings on QuickTime and HyperCard and the rights to AMT returned to Havas. Patrick Soquet acquired these rights and co-founded Tribeworks and developed a new tool based on AML, called iShell.

Features 
The major features of the Apple Media Tool were a graphical authoring tool (AMT itself) and an associated programming environment - the Apple Media Tool Programming Environment (AMTPE) which was a compiler and debugger for the underlying Apple Media Language (AML - also known as the Key language). AMT was notable as one of the first authoring systems to support embedding Apple's pioneering QTVR movie format.

AML is an object-oriented programming language based on Eiffel but specialized for multimedia programming. Although the AMT did not require any programming experience to use, it produced complete AML programs which were then compiled into byte code and interpreted by a runtime interpreter. The AMPTE could be used to enhance the AML code to create more complex programs, for example accessing a database to retrieve media. AML is conceptually similar to Java, with a "write once, run anywhere" approach to cross-platform development: it had runtime interpreters for both the classic Mac OS and Windows platforms.

Awards 
 1993 MacUser Editor's Choice Award for Best New Multimedia Software

References

External links 
Apple Media Tool 2.0 Read Me file

Domain-specific programming languages
Hypertext
Macintosh multimedia software
Authoring systems
Media Tool
B26. B26, B-26 or B.26 may refer to:

Games
 Sicilian Defence, Encyclopaedia of Chess Openings code

Military
 BAM B26, a pellet gun manufactured in China
 Blackburn B.26 Botha, a British World War II torpedo bomber
 Douglas A-26 Invader, an American Cold War bomber, which was designated B-26 from 1948 until 1962
 Fokker B 26, a proposed dive bomber derived from the G.I for the Swedish Air Force
 Martin B-26 Marauder, an American World War II bomber
 Soviet submarine B-26, a Soviet Cold War submarine

Transportation
 Bundesstraße 26, a road in Germany
 B26 (New York City bus), an American bus route
System Contention Scope. In computer science, The System Contention Scope is one of two thread-scheduling schemes used in operating systems. This scheme is used by the kernel to decide which kernel-level thread to schedule onto a CPU, wherein all threads (as opposed to only user-level threads, as in the Process Contention Scope scheme) in the system compete for the CPU. Operating systems that use only the one-to-one model, such as Windows, Linux, and Solaris, schedule threads using only System Contention Scope.

References

Operating system kernels
Processor scheduling algorithms
Chapmanite. Chapmanite is a rare silicate mineral belonging to the nesosilicate group, discovered in 1924, and named in honour of the late Edward John Chapman (1821–1904), a geology professor at the University of Toronto. Chemically, it is an iron antimony silicate, closely related to bismutoferrite, and may contain aluminium impurities. It is closely associated with silver mines, most notably the Keeley mine in Ontario, Canada, found in quartz veinlets containing graphite in gneiss. It takes the form of a powdery, yellow-green, semitransparent solid, and leaves a streak of the same color. Early German texts have referred to the mineral as antimon-hypochlorite.

It was recently rediscovered in the southern hemisphere at the abandoned Argent lead mine in Bushveld series rocks of South Africa.

References

Mineralienatlas
Mindat with location data
Webmineral data
Handbook of Mineralogy (PDF)
 South African discovery Neues Jahrbuch fur Mineralogie-Monatshefte 2000 #2 pages: 85 - 90

Antimony minerals
Iron minerals
Phyllosilicates
Monoclinic minerals
Minerals in space group 8
Minerals described in 1924
PCGS. PCGS may refer to:
 Parallel communicating grammar systems, grammar systems working on their own string and communicating with other grammars in a system by sending their sequential forms on request.
 Preconditioned conjugate gradient square method, a variant of the preconditioned conjugate gradient method – an algorithm for the numerical solution of systems of linear equations whose matrix is symmetric and positive-definite.
 Professional Coin Grading Service, an authentication and grading service for rare coins started by seven coin dealers in 1985 to standardize coin grading.
Hawleyite. Hawleyite is a rare sulfide mineral in the sphalerite group, dimorphous and easily confused with greenockite. Chemically, it is cadmium sulfide, and occurs as a bright yellow coating on sphalerite or siderite in vugs, deposited by meteoric water. 

It was discovered in 1955 in the Hector-Calumet mine, Keno-Galena Hill area, Yukon Territory and named in honour of mineralogist James Edwin Hawley (1897–1965), a professor at Queen's University in Ontario, Canada.

See also
Cadmium
Sulfide mineral
List of minerals
List of minerals named after people

References

Cadmium minerals
Sulfide minerals
Cubic minerals
Minerals in space group 216
Sassolite. Sassolite is a borate mineral, specifically the mineral form of boric acid. It is usually white to gray, and colourless in transmitted light.  It can also take on a yellow colour from sulfur impurities, or brown from iron oxides.

History and occurrence

Its mineral form was first described in 1800, and was named after Sasso Pisano, Castelnuovo Val di Cecina, Pisa Province, Tuscany, Italy where it was found. The mineral may be found in lagoons throughout Tuscany and Sasso. It is also found in the Lipari Islands and the US state of Nevada.  It occurs in volcanic fumaroles and hot springs, deposited from steam, as well as in bedded sedimentary evaporite deposits.

See also

 List of minerals
 Borax

References

External links

Borate minerals
Triclinic minerals
Luminescent minerals
Minerals in space group 2