omniomni/omni-engineering huggingface dataset:
Nash-Fortenberry UFO sighting. The Nash-Fortenberry UFO sighting was an unidentified flying object sighting that occurred on July 14, 1952, when two commercial pilots (William B. Nash and William H. Fortenberry) claimed to have seen eight UFOs flying in a tight echelon formation over Chesapeake Bay in the state of Virginia. 

UFOlogists say the pilots observation allowed for relatively precise measurements of the objects' motion and size when compared to known landmarks, and that the encounter was corroborated by several groups of independent ground witnesses. The case was listed in the U.S. Air Force's Project Blue Book as an "unknown."

Donald Howard Menzel in his book The World of Flying Saucers (1963) suggested some possible naturalistic explanations. He suggested that the pilots may have seen lights on the ground that were distorted by haze. He later suggested they may have seen fireflies that were trapped between the panes of glass in their cockpit window.

Skeptical researcher Steuart Campbell suggested the pilots UFO sighting was a mirage of Venus.

References

Further reading
Steuart Campbell. (1994). The UFO Mystery Solved. Explicit Books. 
James W. Moseley, Karl T. Pflock. (2002). Shockingly Close to the Truth: Confessions of a Grave-Robbing Ufologist. Prometheus Books.

External links
The Pilots' Tale at Saturday Night Uforia
"We Flew Above Flying Saucers", by William B. Nash and William H. Fortenberry, from True magazine, 1967

1952 in Virginia
Accidents and incidents involving the Douglas DC-4
Alleged UFO-related aviation incidents
Aviation accidents and incidents in 1952
UFO sightings in the United States
United States government responses to UFOs
Sheremetev Sh-5. 

The Sheremetev Sh-5 (Шереметьев Ш-5) was a two-seat sailplane designed by Boris Nikolayevich Sheremetev and produced in the Soviet Union in the 1930s. It was an unorthodox design, with a pod-and-boom layout and a cruciform tail that had its horizontal stabiliser mounted atop the boom with a large ventral fin extending below it. The monoplane wing was mounted high, on a pylon above the fuselage pod, and braced to the fuselage with V-struts. Two open cockpits were provided in tandem, with the rear cockpit located beneath the wing. The landing gear consisted of a single sprung skid under the fuselage and a small tailwheel on the ventral fin.

The Sh-5 was used to establish several records during the decade, including distance records of  and   in 1933, and an altitude record  set by Dmitri Aleksandrovich Koshits in 1935. On May 11 the same year, Koshits made a long-distance flight through the Caucasus mountains in a Sh-5 towed behind a Polikarpov R-5, covering   at altitudes up to   in 34 hours of flight.

The Sh-5 was also produced in Turkey as an unlicensed copy by THK as the THK-9 and subsequently by MKEK as the MKEK-7 when the latter company took over the production facilities of the former in 1952.

Specifications

Notes

References
 
 
 
 
 
 
 
 

1930s Soviet sailplanes
Sheremetev aircraft
Aircraft first flown in 1933
MindRover. MindRover: The Europa Project, also known as simply MindRover, is a video game for PC, developed by CogniToy.

Gameplay
The game, which can be thought of as a successor to the Learning Company's Robot Odyssey, revolves around three activities:
 Assemble virtual robots from a library of stock parts.
 Programming robots using a special graphical interface (referred to in the game as "wiring") with a paradigm more based on multicomponent circuitry construction than on traditional programming.
 Participate in events such as robot battles and racing games with newly programmed robot.

Development
The game had a budget of $500,000. In October 2000, CogniToy signed a contract with Tri Synergy to distribute the game to retail stores.

The game was developed for Microsoft Windows and was released for online retail in 1999, and for traditional retail stores a year later. Add-ons were available to control Lego Mindstorms robots.

The game was ported to Linux by Loki Software and Linux Game Publishing and to the Mac by MacPlay.

Reception

The PC version received favorable reviews. Carla Harker of NextGen called the retail version "A truly amazing title for anyone looking for something unique and challenging."

The same PC version was nominated for the "Best Strategy Game for PC", "Best Independent PC Game", and "Most Innovative Game of the Year" awards at The Electric Playgrounds Blister Awards 2000, which went to Sacrifice, Combat Mission: Beyond Overlord, and Jet Grind Radio, respectively.

See also

 Armored Core: Formula Front
 Armored Core: Verdict Day, featuring UNACs, AI controlled Armored Cores which players can create and customize
 BASIC STUDIO Powerful Game Koubou, a 2001 PS2 game creation title by Artdink featuring a sample game based on their title Carnage Heart
 Breeder, a 1986 Famicom algorithm-based simulation combat game by SoftPro
 ChipWits
 COMSIGHT, a 1987 PC88, X1 , and X68000 algorithm-based simulation combat game by Technosoft
 Omega (video game)
 Pandora Project: The Logic Master, a 1996 PS1 algorithm-based simulation combat game by Team Bughouse very similar to Carnage Heart
 Robot Odyssey
 Robot X Robot, a 1999 PS1 algorithm-based simulation combat game by Nemesys
 RoboSport
 Logic simulation

References

External links 
 (archived)
BattleSpot

1999 video games
Classic Mac OS games
Linux Game Publishing games
Linux games
Loki Entertainment games
Programming games
Robotics simulation software
Strategy video games
Tank simulation video games
Video games developed in the United States
Video games set in outer space
Windows games
Simple Green. Simple Green is an American brand of cleaning products produced by Sunshine Makers, Inc. Their best known product is Simple Green All-Purpose Cleaner, which totaled sales of at least US$5.7 million in 2004.

It is advertised as an environmentally friendly, non-toxic, and biodegradable cleaner. It received critical attention from environmental safety activists because of the toxicity concerns of 2-butoxyethanol (EGBE), which was in the formula at under 4%. As of 2013, 2-butoxyethanol has been removed from Simple Green all-purpose cleaner, so now it has an NFPA/HMIS rating of 0/minimal for Health, Fire, Reactivity, and Special. Its main competitors are Lysol, Clorox, and Windex.

Environmental uses
Simple Green has been re-listed as an approved Surface Washing Agent per the EPA's National Contingency Plan after being de-listed in 1995. The new 2013 re-formulation, SW-65 was re-listed with the EPA on 7/09/2013 EPA toxicity testing reports that Menidia beryllina and Mysidopsis bahia survive slightly better in a water solution of 1:10 mixture of Simple Green with crude oil#2 (LC50 = 8.30 ppm for 96 h and 4.40 ppm for 48 h) than in a water solution of crude oil #2 (LC50 = 6.50 ppm for 96 h and 3.70 ppm for 48 h).

In 2001, Crystal Simple Green was used to clean up an oil spill in the Baltic Sea. In 2005, laboratory testing on rainbow trout indicated that Crystal Simple Green by itself did not affect the survival of rainbow trout adults or fry. Crude oil #2 did not affect adults but did increase the mortality rate of fry to 36%. Crystal Simple Green combined with crude oil #2 did not affect adults but did increase the mortality rate of fry to 46%.

Simple Green has also been used for soil remediation projects.

Ingredients 
Simple Green lists the ingredients of their all-purpose cleaner as 

The manufacturer's Ingredient Disclosure list for Simple Green® All-Purpose Cleaner includes methylchloroisothiazolinone and methylisothiazolinone.

References

External links 
 

Cleaning products
Products introduced in 1979
Lego Power Miners. Lego Power Miners (stylized as LEGO Power Miners) was a product range of the construction toy Lego, themed around a team of "Power Miners" who, while investigating the cause of a series of severe earthquakes, discover Rock Monsters and Energy Crystals. The theme was originally released in 2009 after the discontinued Lego Rock Raiders theme. The product line was discontinued by the end of 2010.

Overview
The Power Miners (Doc, Duke, Rex, and Brains) are sent underground by the government to investigate a series of earthquakes that have destroyed several cities on the surface of the Lego World. While underground, they discover Energy Crystals and the Rock Monsters (Meltrox, Boulderax, Glaciator, Sulfurix, Firox, Geolix and Tremorox). They attempt to collect and mine the crystals in order to stop the monsters from consuming them and causing the earthquakes on the surface. However, a bigger threat emerges in the form of the Crystal King, the undisputed ruler of all Rock Monsters underground.

In January 2010, a new sub-theme called Power Miners: Core of the Underworld was introduced, with the plot having the Power Miners collapse to a lower level of caves while fighting the Crystal King with the Titanuim Command Rig, finding themselves in the inner core of the earth and encounter the Lava Monsters (Firax, Combustix, Infernox, and Eruptorr).

Construction sets 
According to BrickLink, The Lego Group released 24 playsets and promotional polybags as part of the Lego Power Miners theme. The product line was eventually discontinued by the end of December 2010.

Below is a list of Power Miners sets. The first two promotional sets were released in December 2008, but later in the year a few of the first wave sets were available at Toys "R" Us stores. Finally, in January 2009, the entire first wave was released. A second batch of sets was released in May 2009 and a third wave of sets in August 2009. All four new sets of 2010 were released in January 2010 to Europe, while sets 8190 and 8191 were not released to America until August 2010. Most of the sets were similar to the Lego Rock Raiders theme.

Awards and nominations 
In 2009, Titanium Command Rig was awarded "DreamToys" in the Construction category by the Toy Retailers Association.

See also 
 Lego Rock Raiders

References

External links 
 

Power Miners
Products introduced in 2009
Products and services discontinued in 2010
Flubber (material). Flubber (named from the film The Absent-Minded Professor), Glorp, Glurch, or Slime is a rubbery polymer formed by cross-linking of polyvinyl alcohol (PVA) with a borate compound. Slime can be made by combining polyvinyl-acetate-based adhesives with borax.

Chemical reaction
The gelation process entails formation of a borate ester that cross links the chains of the PVA. Borate esters form readily by condensation of hydroxyl groups and the B-OH groups. 

The individual polymer chains are bound together by weak hydrogen bonds. The resulting polymer network is composed of strands of polyvinyl alcohol held together side-by-side by the borate molecules. It is evident that this cross linking is weak because of the ease with which the slime flows and pulls apart. However, even though this cross linking is weak, it does alter the properties of the resulting polymer.

Properties
Flubber is a non-Newtonian fluid that flows under low stress, but breaks under higher stresses and pressures. This combination of fluid-like and solid-like properties makes it a Maxwell fluid. Its behavior can also be described as being viscoplastic or gelatinous.

See also
Silly Putty
Gunge
Slime (toy)

References

Chemistry experiments
Non-Newtonian fluids
Sensory toys
Bridging model. In computer science, a bridging model is an abstract model of a computer which provides a conceptual bridge between the physical implementation of the machine and the abstraction available to a programmer of that machine; in other words, it is intended to provide a common level of understanding between hardware and software engineers.

A successful bridging model is one which can be efficiently implemented in reality and efficiently targeted by programmers; in particular, it should be possible for a compiler to produce good code from a typical high-level language. The term was introduced by Leslie Valiant's 1990 paper A Bridging Model for Parallel Computation, which argued that the strength of the von Neumann model was largely responsible for the success of computing as a whole. The paper goes on to develop the bulk synchronous parallel model as an analogous model for parallel computing.

References

Computer architecture
Theoretical computer science
Cavalier Computer. Cavalier Computer, later Cavalier Computer Corporation, is a defunct software company that produced games for the Apple II series of computers.  The company was founded in 1981 by high school classmates Jim Nitchals and Barry Printz and achieved an early success with Bug Attack, a game similar to Centipede that ranked among the top 30 software titles of 1982.
Jim Nitchals died at age 36 in 1998.

Software
 Asteroid Field by Jim Nitchals (1980)
 Bug Attack by Jim Nitchals (1981)
 Microwave by Jay P. Zimmerman and Jim Nitchals (1982)
 Raiders of the lost Ring, sometimes called Ring Raiders, by Jim Nitchals (1981). A clone of Star Castle.
 Star Thief by Jim Nitchals (1981)
 Teleport by Mike Abbott and Jim Nitchals (1982)

References

External links
 Game Designers Remembered: Jim Nitchals

Defunct video game companies of the United States
Privately held companies based in California
Gordano Messaging Suite. GMS (GMS) is a commercial mail and groupware server developed by Gordano Ltd. It runs on Windows, Linux, Solaris, and AIX. Originally called NTMail which was the first commercially available mail for the Windows platform, the products were rebranded to the Gordano Messaging Suite in August 2002 to reflect the support for additional hardware platforms and operating systems.

Features 

The features of GMS include encrypted access using SSL, anti-virus and anti-spam protection, over-the-air handheld synchronization,  web based webmail and calendaring interfaces and a plugin for Microsoft Outlook allowing Microsoft Exchange style functionality.

Administration is performed by a web browser using HTTP

Supported clients

Groupware 
Native support for full groupware features exists for these clients:
 GMS WebMail, which supports Internet Explorer, Firefox and Safari
 Microsoft Outlook by using an Outlook plugin (both online and offline) 
 Mobile devices Apple iPhone, Windows Mobile, Palm Treo, Symbian and BlackBerry using over-the-air synchronization
 Windows Calendar on Windows Vista
 Mozilla Sunbird
 Apple iCal

Mail only 
 All standard mail clients IMAP, SMTP, POP3
 GMS WebMail
 GMS WebMail Mobile on mobile devices
 WAP

References 

Reviews of version 15:
 CRN Review: E-mail Options For Small Business
 PC Pro Review: Gordano Messaging Suite 15

External links
 Official homepage

Groupware
Message transfer agents
Solaris software
Windows Internet software
Internet software for Linux
Fukuoka Subway 2000 series. The  is an electric multiple unit (EMU) train type operated by Fukuoka City Transportation Bureau on the Hakozaki Line and Kūkō Line subway lines in Fukuoka, Japan, since 1993.

Renewals have been carried out sequentially since 2021, and the updated cars have been changed to 2000N series.

Operations
The fleet of six 6-car 2000 series trains are based at  depot and are used alongside the Fukuoka Subway 1000 series on the Hakozaki Line and Kūkō Line subway lines, and also through-running services to and from the Chikuhi Line owned by Kyushu Railway Company (JR Kyushu).

Design
The trains have stainless steel bodies. Each car is  long with four pairs of doors on each side, air conditioning, and space to accommodate wheelchairs. The longitudinal seats are covered with a green moquette.

Formations
As of 1 April 2014, the fleet consists of six 6-car sets consisting of four motored ("M") cars and two non-powered trailer ("T") cars, formed as shown below with car 1 at the Meinohama end.

 Cars 3 and 5 each have two cross-arm pantographs.
 Car 5 is designated as a mildly air-conditioned car.

History
The 2000 series was introduced in 1993.

A refurbishment program was carried out on all six 2000 series sets between 2015 and 2017. The destination signs were replaced with multilingual four-color destination signs and the interior seating arrangement was changed.

After that, the 2000N series, which has been renewed mainly underfloor equipment and interior decoration of the main circuit equipment and auxiliary power supply equipment, has completed all renovation work, has started operating on January 7, 2021.

References

External links

 Official website (archived on 19 December 2012) 
•official website(2000N series)
 official website(2000 series) 
 福岡市交通局2000系 - NIPPON SHARYO, LTD

2000 series
Electric multiple units of Japan
Train-related introductions in 1993
Kawasaki multiple units
Kinki Sharyo multiple units
Nippon Sharyo multiple units
1500 V DC multiple units of Japan
MAN SL202. The MAN SL202 is a single-decker bus manufactured by MAN in Salzgitter, Germany between 1983 and 1993. It was also available as a chassis for external bodywork.

History
The MAN SL202 succeeded the MAN SL200 in 1983.

The SL202 came with a wide choice of transmissions, from three and four-speed Renk Doromat automatic transmissions, to three and four-speed Voith DIWA transmissions, to four and five-speed ZF Ecomat 4HP500 or 5HP500 transmissions. One to date has been retro-fitted with an Allison World Series B300R4 transmission, creating a largely noticeable increase in performance against similar examples with the three-speed Voith DIWA transmission.

The internal combustion engines used in the SL202 were replaced around 1990, from older, smaller, 2566 series engines to newer, larger, 2866 series engines. The majority of pre-1990 SL202s have a  D2566UH engine, developing about  of torque at 1,400 rpm. These D2566 engines have a capacity of  and max out at 2,200 rpm. This same engine was used for the SL200 and is similar in design to that of the OM407h engine used in the Mercedes-Benz O305.

Post-1990 SL202s have the D2866 engine, with higher power and torque figures. These engines have a capacity of  and maximum output at 2,200 rpm, the design is similar to the OM447h engine of the Mercedes-Benz O405.

Much of the design was used in the North American version of the SL202, the MAN Americana SL40-102. The SL202 was superseded by the MAN NL202.

Operators
The MAN SL202 was mainly sold in Germany. The chassis version was sold in Australia and New Zealand.

Australia
Sydney Buses purchased 50 Pressed Metal Corporation bodied SL202s in 1989 which were retired in 2013, while the State Transport Authority, Adelaide took delivery of 125 Pressed Metal Corporation Australia bodied examples between 1992 and 1996. The Brisbane City Council purchased two while Darwinbus purchased five.

New Zealand
The Auckland Regional Council purchased 69 SL202s, Christchurch Transport Board 57, New Plymouth City Transit six and Wellington City Council 30. New Zealand Coach Service purchased 11 SL202s between 1986 and 1988.

References

External links

 
SL202
Buses of Germany
Bus chassis
Single-deck buses
Vehicles introduced in 1984
Ilyushin Il-46. 

The Ilyushin Il-46 was a jet-engined bomber produced in the USSR during 1951-2, as the result of a directive to redesign the Il-42 project (half the drawings had already been completed). The revised specification was for an aircraft with twice the range and 1 1/2 times the bomb load, with a prototype ready to be submitted for state acceptance trials in July 1952. The Ilyushin design bureau set about designing two versions of the same aircraft, the straight-wing (Il-46) and the swept-wing (Il-46S), with as much as possible common to both aircraft. To meet the schedule for state acceptance trials Ilyushin built only the straight-wing version, fearing that the design, manufacture and flying characteristics of the swept-wing aircraft might cause delays.

Design and development
The airframe, constructed of aluminium alloy with steel used in highly stressed parts, resembled a large Il-28, the long fuselage having swept tail surfaces, and a similar arrangement of cockpits for the crew of pilot, navigator and rear gunner. The wing, which had moderate taper but straight leading edges, copied the layout of the Il-28, being mounted in the shoulder position at the midpoint of the fuselage. The flying controls consisted of the usual ailerons, elevators and rudder, all fitted with trim tabs for reducing loads on the pilots controls during flight in steady states, as well as "reversible"  hydraulically-powered actuators.

Two Lyul'ka AL-5 engines were fitted in long nacelles forward of the wings, exhausting through long jetpipes at the rear of the nacelles, aft of the wing trailing edge. The engines were mounted in this fashion to make room for the retracted main undercarriage legs, two on each side attached to the engine nacelles under the wings. The paired main undercarriage legs, side by side, retracted in opposite directions, inboard forwards and outboard rearwards, with the single mainwheels rotating 90 degrees to lie flat under the long jetpipes of the AL-5 engines. To boost takeoff performance, two JATO bottles could be attached to the rear fuselage. Performance was also improved when Lyulka AL-5F (forseerovannyy - afterburning) engines were fitted.

Flight tests and state acceptance trials were successful, with the Il-46 meeting all requirements. Production was not ordered because the Tupolev Tu-88 proved to have better performance, and was ordered into production as the Tu-16.

The Il-46S swept-wing version was designed concurrently, but construction was not started, to ensure that resources were not diverted from the Il-46.

Variants
 Il-46
 Il-46S

Specifications (Il-46)

See also

References

External links
 

1950s Soviet bomber aircraft
Abandoned military aircraft projects of the Soviet Union
Il-046
Twinjets
Aircraft first flown in 1952