omniomni/omni-engineering huggingface dataset:
Dó paper. Dó paper (, chữ Nôm: 𫷏𦾤 "mulberry paper") is a paper made from the inner bark of the dó tree and traditionally produced in many villages in Vietnam. It plays an important role in folk art, Đông Hồ painting in particular, because of its durability.

Production process 
The production process includes some stages. First, the bark is soaked in limewater for three months. Second, the black outer bark is husked off and ground by mortar and pestle before being blended with a viscous substance made from a plant belonging to the family Verbenaceae. This mixture is diluted to form a slurry. A bamboo mold (Vietnamese: liềm xeo) is dipped into the vat of slurry and removed. Paper fibers adhere to the mold in a thin sheet that is then pressed, dried, rolled, and dried again. The final product must be soft, light, and durable.

Applications
Due to its durability, this paper found many uses in traditional Vietnam, including the making of books, paintings, and documents.

References 

Paper
Vietnamese painting
Transmit and receive integrated assembly. A transmit and receive integrated assembly (TRIA) is used on a two-way satellite dish to process signals to and from a ground-based system and an earth-orbiting satellite. The TRIA is the part of the antenna which contains both the feed horn and the circuits which convert high-frequency satellite signals such as X-band, Ku-band and Ka-band to and from the L-band microwave signals used for transmission between the dish and the customer-premises equipment.

See also
LNBF
Block upconverter

Satellite broadcasting
Antennas
Liquid chalk. The term liquid chalk, or sharkchalk, refers to several different kinds of liquified chalk including liquid-chalk marking pens (with water-soluble ink), liquid-chalk mixtures (for athletic use: rock climbing, weightlifting, gymnastics), and liquid-chalk hobby-craft paints made of cornstarch and food coloring (some with small amounts of flour). Some forms of "liquid chalk" contain no actual chalk.

Use in sports 
Liquid chalk can be a variation of normal chalk (see: magnesium carbonate) used to improve grip for sports, such as rock climbing, weight lifting, or gymnastics.

Rock climbing 
Rock climbers use liquid chalk to prevent their hands from sweating. It may be used by climbers in situations where powdered chalk is restricted.  It is preferred by some athletes because it remains effective longer and leaves less residue on rocks and equipment. Liquid chalk for rock climbers is made from magnesium carbonate.

Other sports 
In other sports, liquid chalk is less beneficial to the athlete, because re-chalking can be done more easily between sets or rounds. However, some gyms require liquid chalk because it leaves less residue on gym equipment. Liquid chalk adheres to the hand better, reducing the need to re-chalk.

Ingredients 
Some liquid-chalk mixtures for climbing are made with magnesium carbonate, colophony, and ethanol or an alcohol that dissolves the colophony and quickly evaporates from the solution (as isopropyl alcohol or ethanol). Sometimes, an additive for aroma is included because of the bad smell of spirit.

See also 
 Glossary of climbing terms
 Climbing
 Bouldering
 Magnesium carbonate

References

Climbing equipment
Alchemical substances
Gecode. Gecode (for Generic Constraint Development Environment) is a software library for solving Constraint satisfaction problems. It is programmed in C++ and distributed as free software under the permissive MIT license. Gecode has bindings for several programming languages such as Prolog, Python and Ruby, and an interface to the AMPL modeling language.

The development of Gecode has been led by Christian Schulte, but has been contributed to by many other researchers and programmers, including 
Denys Duchier, 
Filip Konvicka, 
Gabor Szokoli, 
Guido Tack, 
Håkan Kjellerstrand, 
Mikael Lagerkvist, 
Patrick Pekczynski, 
Raphael Reischuk, and 
Tias Guns.

The first release of Gecode was in December 2005.   Since then, Gecode has rapidly become one of the most prominent constraint programming systems.
Reasons for this are that it runs fast, is extensible, free and open source under a permissive licence, and is written in a popular language.    As well as being very useful in its own right, its extensibility and licensing makes it highly suitable for use on other projects. Gecode has been ported to several language, for instance, Gelisp is a wrapper of Gecode for Lisp.

Notes

References 
 Speeding up constraint propagation. Christian Schulte and Peter J. Stuckey, In Wallace, 2004, pages 619–633.
 Compiling and Executing Declarative Modeling Languages to Gecode. Raffaele Cipriano, Agostino Dovier, Jacopo Mauro. Conference: International Conference on Logic Programming/Joint International Conference and Symposium on Logic Programming - ICLP(JICSLP), pp. 744–748, 2008
 Monadic Constraint Programming with Gecode. Pieter Wuille, Tom Schrijvers. Proceedings of the 8th International Workshop on Constraint Modelling and Reformulation pages:171-185. International workshop on Constraint Modelling and Reformulation. Lisbon, 20 September 2009.
 A hybrid solver for large neighborhood search: Mixing Gecode and EasyLocal++. Raffaele Cipriano, Luca Di Gaspero, Agostino Dovier. Conference: Hybrid Metaheuristics - HM, pp. 141–155, 2009. DOI: 10.1007/978-3-642-04918-7_11

External links 
Gecode home site
Christian Schulte , lead developer of Gecode.
Constraint Propagation  - Dissertation by Guido Tack explaining the theory and implementation of Gecode

Constraint programming
Software using the MIT license
River Gadder. The River Gadder is  long tributary of the River Wissey. It rises from a tiny headwater in  the north-east of the parish of Cockley Cley in the English county of Norfolk. The river rises in a watermeadow  north east of Home Farm.

The course
From its head the river runs in a south-westerly direction through a shallow valley surrounded by the breckland landscape towards the village of Cockley Cley. The river skirts the southern edge of the village and provides a haven for wildlife. The grasslands either side of the river are protected under the Environmentally Sensitive Area (ESA) scheme. Various species of fish including stickleback, bullhead and brown trout can be viewed in the river's crystal clear water.

Gooderstone Water Gardens
Further downstream the river reaches Gooderstone. The village takes its name from the river. Gooderstone Water Gardens were created by retired farmer Billy Knights in 1970 from a wet meadow. They cover an area of  beside the river. There are four ponds, waterways, 13 bridges, flat grassy paths, mature trees and shrubs and colourful bog plants and border perennials. Amenities include a tearoom, plant sales, toilets for disabled people and seating areas throughout the garden. A  wildlife area has been put aside together with a kingfisher hide

Oxborough and Oxburgh Hall
The river now heads towards Oxborough and here the river's waters are used to feeds the moat around Oxburgh Hall. Today the hall is in the care of the National Trust. Built around 1482 by Sir Edmund Bedingfield. Oxburgh has always been a family home, not a fortress. The manor of Oxburgh came to the Bedingfeld family by marriage before 1446, and the house has been continuously inhabited by them since their construction of it in 1482, the date of Edward Bedingfeld's licence to crenellate.
After running a course of  the river joins the River Wissey on its northern bank close to Oxborough Hythe.

Gallery

References

Gadder, river
Meridian Systems. Meridian Systems, a Trimble Inc Company, is a Plan-Build-Operate technology solutions provider for project-based organizations. Building owners, construction and engineering firms, and public agencies use Meridian software to manage capital building programs and facility assets. Meridian offers construction project management and infrastructure lifecycle management solutions for controlling project costs and schedules across the plan-build-operate project lifecycle.

The company was founded in 1993 and is headquartered in Folsom, California, in the United States of America. In November 2006 it was acquired by Trimble ()

References

Software companies based in California
Folsom, California
Defunct software companies of the United States
SETCA Milan. The SETC

Design and development 
The Milan was designed by Messrs. Laboureix and Lagrevol as a two-seat side-by-side light utility aircraft.  It was of all-wood construction with a fixed spatted tricycle undercarriage and had dual controls.  Powered by a  Regnier 4E.0 inverted inline engine, it first flew in 1947.

Production and service
The Milan obtained its CNRA in August 1949. Its normal  was awarded in 1952. The prototype F-BCZZ was flown until at least 1957, but plans for further production did not reach fruition.

Specifications

References

1940s French civil utility aircraft
Low-wing aircraft
Single-engined tractor aircraft
Aircraft first flown in 1947
Vittorio Zonca. Vittorio Zonca (1568–1603) was an Italian engineer and writer. He wrote the Theater of machines, which was published in Padua in 1607 four years after his death.

Some of his plates were translated into Chinese by Johann Schreck and published in the 1627 Chinese book on European mechanical arts Diagrams and explanations of the wonderful machines of the Far West.

Works
 Vittorio Zonca Novo Teatro di Machine et Edificii, Padua 1607.

Notes

References
 Arnold Pacey The Maze of Ingenuity: Ideas and Idealism in the Development of Technology MIT Press, 1992 
 Francis C. Moon The Machines of Leonardo Da Vinci and Franz Reuleaux: Kinematics of Machines from the Renaissance to the 20th Century Springer, 2007 
 Joseph Needham, Ling Wang, Gwei-Djen Lu Science and civilisation in China Cambridge University Press, 1965

External links
 
Vittorio Zonca (1607) Novo teatro di machine et edificii per varie et sicure operationi - digital facsimile from the Linda Hall Library

1568 births
1603 deaths
Italian engineers
Italian male non-fiction writers
Italian science writers
Westland Weasel. The Westland Weasel was a prototype British two-seat fighter/reconnaissance aircraft of the First World War. Designed to replace the Bristol Fighter, the Weasel was a single engined tractor biplane. Four prototypes were built, but no production followed owing to the failure of its original engine, although the prototypes were used as engine test beds for the successful Armstrong Siddeley Jaguar and Bristol Jupiter engines.

Development and design
The Westland Weasel was designed by Westland Aircraft of Yeovil to meet the Royal Air Force's Type IIIA Specification for a two-seat fighter/reconnaissance aircraft to replace the successful Bristol Fighter. An order for three prototypes was placed in April 1918, together with orders for competing designs from Bristol (the Badger) and Austin Motors (the Greyhound). The Weasel was a two-bay biplane of wood and fabric construction, with the pilot and observer/gunner seated close together in separate cockpits, with the upper wing above the pilot being cut away to improve the upwards view. Armament was similar to the Bristol Fighter, with two synchronised Vickers guns and one or two Lewis guns for the observer.   Like the other two competitors, the Weasel was powered by the officially encouraged ABC Dragonfly 9-cylinder air-cooled radial engine.

The first prototype, although largely complete by the end of June, had to wait for delivery of an engine, and did not fly until late November 1918, after the Armistice ended World War I.  As with the many other British aircraft projects of 1918, use of the Dragonfly engine proved a disaster, with the engine not only being underpowered and overweight, but more seriously, plagued with rapid overheating and severe vibration.  These problems were unsolvable, and although the Weasel had slightly better performance than the Bristol and Austin designs, the failure of the Dragonfly and the lack of urgent need to replace the excellent Bristol Fighter meant that large scale orders did not follow.

Despite this, an order was placed for a fourth prototype to serve as an engine testbed. The first and third prototypes were fitted with the Armstrong Siddeley Jaguar radial, while the second and fourth aircraft were fitted with the Bristol Jupiter engine.  These aircraft proved valuable testbeds, with the last Weasel remaining in use until May 1925.

Specifications (Dragonfly engine)

See also

References

Bruce, J.M. War Planes of the First World War: Volume Three Fighters. London:Macdonald, 1969. .
James, Derek N. Westland Aircraft since 1915. London:Putnam, 1991. .

External links

Aircraft Data Sheet: Weasel (1918). AgustaWestland.

1910s British fighter aircraft
Weasel
Aircraft first flown in 1918
Biplanes
Single-engined tractor aircraft
Aircraft with fixed conventional landing gear
Single-engined piston aircraft
Cheadle Heath. Cheadle Heath  is a suburb of Stockport, Greater Manchester, England,  west of the town centre and  southeast of Manchester.

Cheadle Heath railway station, on the site now occupied by Morrisons supermarket, closed in 1967.

It is home to Cheadle Heath Nomads Football Club.

Industry
Cheadle Heath is home to a number of engineering companies including Thales Underwater Systems, a company formed from the sonar activities of Ferranti.

The engineering company Henry Simon Ltd built a large factory and office complex on Bird Hall Lane 1924-26. Later the whole of extensive engineering business was moved to Cheadle Heath.  The distinctive tower at the front of the research and development block was used to test experimental flour milling machinery. Most of the site is now demolished. Nearby was the Oil Well Engineering Company, a manufacturer of oil exploration drilling equipment that closed down in 1998.

The former Gorsey Bank council estate in Cheadle Heath, notorious for vandalism and antisocial behaviour, has been demolished and is now the Aurora Business Park after a £10 million investment from Stockport Metropolitan Borough Council.

References

Areas of Stockport
SST class airship. The SST (Sea Scout Twin) class of non-rigid airship or "blimp" was developed in Great Britain during World War I from the earlier SS class airship. The main role of these craft was to escort convoys and scout or search for German U-boats. A secondary purpose was to detect and destroy mines.

Designs were submitted in 1917 for a twin-engined SS class airship, the idea being that should there be an engine failure, the craft would not be rendered helpless and therefore less likely to be lost. The first submission was a failure, but the second showed promise and was put into production. Designated the SST class, the first of 13 examples entered service in June 1918, and the last in May 1919, three of which, S.S.T.9, 11 and 12 were purchased by the US Navy.

The SST used a larger  envelope than any of the other SS class types, and was equipped with a streamlined and waterproofed car that could accommodate a crew of five. Two  Sunbeam or  Rolls-Royce Hawk engines were each mounted on a gantry either side of the car, and drove  diameter four-bladed propellers in pusher configuration. At , the SSTs had a greater top speed than all other SS class types, had the highest useful lift, and could stay airborne for up to two days. They were also cheaper to produce and easier to handle than the successful C Star class airship. Three SST  were transferred to the Navy in June 1919. No Serial Numbers were assigned and there is no evidence they operated by the Navy. The 3 SST's were transferred to the Army in 1919-1920. The Army operated the SST's until late 1923 or early 1924.

Experiments involving SSTs were carried out at the end of the war; one notable example being SSE.3 (SS Experimental) that had an envelope design known as shape "U.271", the shape from which the hulls of both R100 and R101 were derived.

Operators

Royal Naval Air Service / Royal Air Force

United States Army

Specifications

See also

References

Notes

Bibliography

External links
 SS-class airships on the Airship Heritage Trust website
 SST-class airship specifications and logs on the Airship Heritage Trust website
 

Airships of the United Kingdom
1910s British patrol aircraft
Military airships of World War I
Airships of the United States Navy
Aircraft first flown in 1918
Airships of the United States
QDevelop. QDevelop is a free software integrated development environment specialized on the Qt4 framework and C++.
It uses gcc for building and gdb for debugging.

It supports Source code editor with syntax highlighting with native support for Qt Keywords and integrates different Qt Tools such as Qt Designer and qmake. QDevelop's Editor features code completion and automatic indentation. There's also a project management system and a class browser that enables the programmer to navigate through classes and data structures.

See also
 Qt Creator
 Comparison of integrated development environments

External links
 QDevelop on Google Code.

Cross-platform software
Integrated development environments
Free integrated development environments
Linux integrated development environments
Cross-platform free software
Free software programmed in C++
Software that uses Qt
Software using the GNU General Public License
River basin management plans. River basin management plans are a management tool in integrated water resources management. They generally contain descriptions of the water resources in a drainage basin and water allocation plans.

Europe
River Basin Management Plans are a requirement of the Water Framework Directive and a means of achieving the protection, improvement and sustainable use of the water environment across Europe. This includes surface freshwaters (including lakes, streams and rivers), groundwater, ecosystems such as some wetlands that depend on groundwater, estuaries and coastal waters out to one nautical mile.

The Directive requires member states to aim to achieve at least good status in each water body within their river basin districts. Each member state must produce a plan for each of the river basin districts within its territory.

Plans must include: objectives for each water body; reasons for not achieving objectives where relevant; and the programme of actions required to meet the objectives.

River Basin Management Plans were published for several member states in December 2010.

River basin management in a changing climate - a Guidance document
In November 2009, Water Directors of EU Member States issued a guidance document on adaptation to climate change in water management. The document is the first result of numerous actions included in the European Commission White Paper Adapting to climate change; Towards a European framework for action. The document includes guidance on how to take climate change into account in the implementation of the Water Framework Directive, the Floods Directive and the Strategy on Water Scarcity and Droughts.

See also
Detention basin
Murray-Darling Basin Plan,

References

External links
River basin planning in England and Wales - The Environment Agency and Natural Resources Wales
River basin planning in Scotland - Scottish Environment Protection Agency
 River basin management in a changing climate - a Guidance document (pdf 2.1MB)

Water resources management
River regulation
Hydrogen disulfide. Hydrogen disulfide is the inorganic compound with the formula . This hydrogen chalcogenide is a pale yellow volatile liquid with a camphor-like odor. It decomposes readily to hydrogen sulfide () and elemental sulfur.

Structure
The connection of atoms in the hydrogen disulfide molecule is . The structure of hydrogen disulfide is similar to that of hydrogen peroxide, with C2 point group symmetry. Both molecules are distinctly nonplanar. The dihedral angle between the  and  planes is 90.6°, compared with 111.5° in . The  bond angle is 92°, close to 90° for unhybridized divalent sulfur.

Synthesis
Hydrogen disulfide can be synthesised by cracking polysulfanes () according to this idealized equation:

The main impurity is trisulfane (). The precursor polysulfane is produced by the reaction of hydrochloric acid with aqueous sodium polysulfide. The polysulfane precipitates as an oil.

Reactions
Upon contact with water or alcohols, hydrogen disulfide readily decomposes under ambient conditions to hydrogen sulfide and sulfur. 

It is more acidic than hydrogen sulfide, but the pKa has not been reported.

In organosulfur chemistry, hydrogen disulfide adds to alkenes to give disulfides and thiols.

Quantum tunneling and its suppression in deuterium disulfide
The deuterated form of hydrogen disulfide, deuterium disulfide  (dideuterodisulfane), has a similar geometry to , but its tunneling time is slower, making it a convenient test case for the quantum Zeno effect, in which frequent observation of a quantum system suppresses its normal evolution. Trost and Hornberger have calculated that while an isolated  molecule would spontaneously oscillate between left and right chiral forms with a period of 5.6 milliseconds, the presence of a small amount of inert helium gas should stabilize the chiral states, the collisions of the helium atoms in effect "observing" the molecule's momentary chirality and so suppressing spontaneous evolution to the other chiral state.

Health effects
In high concentrations, it can cause dizziness, disorientation and ultimately unconsciousness.

Historic literature

Georg Brauer: Handbook of Preparative Inorganic Chemistry Volume I, page 391, Wiley, 1963.
von Richter, Victor: Translated by Edgar F Smith, "A Text-Book of Inorganic Chemistry", Page 111, P. Blakiston, Son & Co., 1893

References

Hydrogen compounds
Disulfides
Scienova. Scienova GmbH is a spin-off of Friedrich-Schiller-University, Jena, Germany, and was established by a group of scientists and management people. The innovative concept behind this company is to develop and manufacture functionalized lab disposables for the convenience of the scientific community.

One of the major innovative products from Scienova is equilibrium dialyzer developed for high-throughput ADME screenings, especially for Protein Binding Studies. It was developed by Dr. Stefan Kreusch et al.

External links
Website

University of Jena
Technology companies of Germany
Remote component environment. The remote component environment (RCE) is an integration environment for scientists and engineers to analyze, design, and simulate complex systems (e.g., aircraft, satellites, and space vehicle). It focusses on the collaboration in multidisciplinary teams. Treating complex systems requires many experts and several analysis, design, and simulation tools. In RCE, the tools are integrated and coupled to workflows. RCE executes the workflows and fetches the results from the involved tool servers. RCE is extensible and supports different scientific applications with slightly different requirements. RCE is built upon the Eclipse Rich Client Platform (RCP). It is open source and published under the Eclipse Public License (EPL).

Development of the RCE platform took place in the SESIS project. 

Previously the platform was known by Reconfigurable Computing Environment. Since it has been open sourced the name changed to Remote Component Environment.

References

External links
 Official RCE website

Java platform software
Grid computing projects
Distributed computing architecture
Scientific simulation software