omniomni/omni-engineering huggingface dataset:
Yellow River Conservancy Commission. Yellow River Conservancy Commission (YRCC) is a government agency of Ministry of Water Resources of the People's Republic of China. YRCC takes responsibility of water administration of the Yellow River basin and the inland river basins in such province as Xinjiang, Qinghai, Gansu and Inner Mongolia.

Organization

Headquarters
Office of Administration, YRCC 
Office of the Chief Engineer, YRCC 
Department of Planning and Programming, YRCC 
Department of Water Policy, YRCC (Water-policy Supervising Team) 
Department of Water Resources Management and Regulation, YRCC 
Department of Financial Affairs, YRCC 
Department of Personnel, Labour and Education, YRCC 
Department of International Cooperation, Science and Technology, YRCC 
Department of Construction and Management, YRCC (Yellow River Basin Branch, Water Project Quality Control Station of the Ministry of Water Resources) 
Department of Water and Soil Conservation, YRCC 
The Office of Flood Control, YRCC 
Department of Supervision, YRCC 
Department of Auditing, YRCC 
Department of Retirement Administration, YRCC 
Chinese Communist Committee, YRCC 
Yellow River Committee of Agricultural, Forestry and Water Conservancy Workers Union of China

Additional Unit 
Yellow River Basin Water Resources Protection Bureau of the Ministry of Water Resources and Ministry of Environmental Protection

Institutional Units 
Yellow River Shandong Bureau, YRCC 
Yellow River Henan Bureau, YRCC 
Upper and Middle Yellow River Bureau, YRCC 
Heihe River Bureau, YRCC 
Hydrological Bureau, YRCC 
Economic Development and Management Bureau, YRCC 
Yellow River Institute of Hydraulic Research, YRCC 
Resettlement Bureau, YRCC 
Yellow River Administrative Service Centre, YRCC 
Yellow River Central Hospital, YRCC 
Press and Publication Center, YRCC 
Information Center, YRCC 
Yellow River Xiaobeiganliu Shanxi Bureau, YRCC 
Yellow River Xiaobeiganliu Shaanxi Bureau, YRCC

Corporations 
Institute of Hydraulic Survey, Programming and Designing, YRCC 
Yellow River Mingzhu (Holding) Co. Ltd. (Management Bureau of Sanmenxia Multipurpose Project)

External links
 The official website of Yellow River Conservancy Commission

Water resource management in China
Changjiang Water Resources Commission. The  Changjiang Water Resources Commission (CWRC; ) is a river basin authority dispatched by the Ministry of Water Resources of the People's Republic of China to exercise water administrative functions in the Yangtze River Basin and other river basins of southwestern China (west to and inclusive of the Lancang River). As the legacy of the former Yangtze River Water Resources Commission that existed before founding of the People's Republic of China, the CWRC was re-established in February 1950 with its headquarters seated in Wuhan. In accordance with national legislature and the authorization from the Ministry of Water Resources, the CWRC is responsible for water administration and law enforcement, integrated water resources management (including water conserving, allocation and protection), basin planning, flood control and drought relief, river course management, key hydraulic project construction and management, river sand extraction management, soil conservation, hydrology, scientific research as well as operation and stewardship of State owned assets.

Organization

Administrative agencies
Executive Office
Office of Chief Engineers
Bureau of Planning and Programming
Bureau of Water Administration and Water Resources (Corps of Water Administrative Supervision)
Bureau of International Cooperation, Science and Technology
Bureau of Finance and Economy
Bureau of Personnel, Labor and Education
Bureau of Yangtze River Sand Extraction Management
Bureau of Soil and Water Conservation
Office of Yangtze River Flood Control (Bureau of River Management)
Bureau of Project Construction and Management
Bureau of Censorship
Bureau of Audit
Bureau of Retirees Service
Labor Union Yangtze Branch

Special establishments
Bureau of Yangtze Basin Water Resource Protection

Institutions
Bureau of Hydrology
Changjiang River Scientific Research Institute 
Institute of Ecological Studies for Water Project
Bureau of Yangtze Engineering Construction
Bureau of Lushui Experimental Hydropower Complex Management
Yangtze Institute of Geotechnique and Survey
Comprehensive Management Center
Network and Information Center
Communication and Publishing Center (Yangtze Press)
Human Resource Development Center
Logistics Center (Bureau)
Central Station of Yangtze Basin Soil and Water Conservation Monitoring
Yangtze Hospital (Schistosomiasis Prevention and Monitoring Center)
Post of Liaison in Beijing

Enterprises
General Corporation of Changjiang Water and Hydropower Development
Changjiang Institute of Survey, Planning, Design and Research
Hanjiang River Water and Hydropower Group Co., Ltd. (Bureau of Danjiangkou Hydropower Complex Management)
Yangtze River Engineering Consulting Company

References

External links
 The official website of Changjiang Water Resources Commission

Water resource management in China
Symposium on Computational Geometry. The International Symposium on Computational Geometry (SoCG) is an academic conference in computational geometry. Today its acronym is pronounced "sausage." It was founded in 1985, with the program committee consisting of David Dobkin, Joseph O'Rourke, Franco Preparata, and Godfried Toussaint; O'Rourke was the conference chair. The symposium was originally sponsored by the SIGACT and SIGGRAPH Special Interest Groups of the Association for Computing Machinery (ACM). It dissociated from the ACM in 2014, motivated by the difficulties of organizing ACM conferences outside the United States and by the possibility of turning to an open-access system of publication. Since 2015 the conference proceedings have been published by the Leibniz International Proceedings in Informatics instead of by the ACM. Since 2019 the conference has been organized under the auspices of the newly formed Society for Computational Geometry.

A 2010 assessment of conference quality by the Australian Research Council listed it as "Rank A".

References

External links

Recurring events established in 1985
Mathematics conferences
Theoretical computer science conferences
Computational geometry
Association for Computing Machinery conferences
Metal triflimidate. A metal triflimidate M(NTf2)n in organic chemistry is a metal salt or complex of triflimidic acid and used as a catalyst.

Metal triflimidates are prepared by reaction of metal oxides, carbonates, hydroxides, or halides with triflimidic acid in water as the hydrate M(NTf2)n·xH2O with x ranging from zero to nine. Another method is by metathesis reaction between a metal triflimidate and another metal complex by metal exchange. Commercially available salts are based on lithium and silver.

The catalytic activity of metal triflimidates has been demonstrated in cycloadditions, in various rearrangement reactions, in Friedel–Crafts acylation and Friedel–Crafts alkylation.

Lithium triflimidate is used as an electrolyte in batteries as a replacement of lithium perchlorate.

Gold phosphine or NHC triflimidates (LAuNTf2, L = R3P or NHC) are isolable though somewhat labile complexes of gold that serve as sources of catalytically-active LAu+ ions.

References

Catalysts
Turn-by-turn navigation. Turn-by-turn navigation is a feature of some satellite navigation devices where directions for a selected route are continually presented to the user in the form of spoken or visual instructions. The system keeps the user up-to-date about the best route to the destination, and is often updated according to changing factors such as traffic and road conditions. Turn-by-turn systems typically use an electronic voice to inform the user whether to turn left or right, the street name, and the distance to the next turn.

Mathematically, turn by turn navigation is based on the shortest path problem within graph theory, which examines how to identify the path that best meets some criteria (shortest, cheapest, fastest, etc.) between two points in a large network.

History
Real-time turn-by-turn navigation instructions by computer was first developed at the MIT Media Laboratory by James Raymond Davis and Christopher M. Schmandt in 1988. Their system, Backseat Driver, monitored the car's position using a system developed by NEC that communicated over a cellular modem with software running on a Symbolics LISP Machine at the Media Lab. The computer then used a speech synthesizer to compute appropriate directions and spoke them to the driver using a second cellular phone.

Devices and services
Major mapping services that offer turn-by-turn navigation, grouped by map data provider:
Google:
Google Maps, a free online navigation app by Google for Android, iOS and KaiOS
HERE Technologies: 
HERE WeGo, a free online and offline navigation app for Android, Fire OS and iOS
Garmin, road portable navigation devices, car built-in navigation devices
Genius Maps, a paid online and offline turn-by-turn navigation app for Android, HarmonyOS and iOS
 OpenStreetMap. Offline-capable applications that use volunteer-contributed data:
Karta GPS, a free online and offline navigation app for Android and iOS
Locus Map, a free online and offline navigation app for Android
 Magic Earth, a proprietary, free online and offline navigation app for Android, Fire OS and iOS
Maps.me, a free offline and open-source app for Android and iOS
Mapy.cz, a free online and offline navigation app for Android, iOS and Windows
Organic Maps, a free and open-source offline map and navigation app for Android, iOS, iPadOS, macOS and Linux
OsmAnd, a free online and offline navigation app for Android, Fire OS and iOS
Scout GPS Link for Android and iOS
Other:
Sygic GPS Navigation, a paid offline turn-by-turn navigation app for Android and iOS (map data based on Here, TomTom, OpenStreetMap and Sygic Maps)
Waze, a free app providing turn-by-turn navigation on Android, iOS and Windows
TomTom: 
TomTom car, motorcycle and truck portable navigation devices, car and truck built-in navigation devices, Android and iOS smartphones and tablets online and offline through AmiGO
Apple Maps, a free online navigation app for iPhone and ipad using iOS 6 or later
Petal Maps, a free online and offline navigation app for Android 7 or later, HarmonyOS and iOS
Windows Maps, a free online and offline navigation app for Windows

See also

Waypoint

References
List of hydroelectric power station failures. This is a list of major hydroelectric power station failures due to damage to a hydroelectric power station or its connections.  Every generating station trips from time to time due to minor defects and can usually be restarted when the defect has been remedied. Various protections are built into the stations to cause shutdown before major damage is caused. Some hydroelectric power station failures may go beyond the immediate loss of generation capacity, including destruction of the turbine itself, reservoir breach and significant destruction of national grid infrastructure downstream.  These can take years to remedy in some cases.

Where a generating station is large compared to the connected grid capacity, any failure can cause extensive disruption within the network.  A serious failure in a proportionally large hydroelectric generating station or its associated transmission line will remove a large block of power from the grid that may lead to widespread disturbances.

List of failures

See also

 Dam failure
 List of power outages
 Hydraulic engineering
 Hydroelectricity
 List of significant thermal power station failures
 Operation Chastise
 Malpasset Dam
 St. Francis Dam
 Taum Sauk Hydroelectric Power Station

References

Electric power-related lists
Failures
I-Fly. I-Fly is a Russian charter airline based in Moscow operating mainly out of Vnukovo International Airport. It flies all services on behalf of Russian tour operator TEZ Tour.

Destinations
I-Fly destinations:

Fleet

The I-Fly fleet consists of the following aircraft, as of July 2022:

Air Lease Corporation are seeking to recover four Airbus A330s, as the lease payments are not being made.

The airline fleet previously included the following aircraft:
 1 Boeing 757-200 (as of November 2015)

References

External links

Official website 

Airlines of Russia
Airlines established in 2009
Airlines banned in the European Union
Charter airlines
Companies based in Moscow
2009 establishments in Russia
BSA A65 Rocket. The BSA A65R Rocket was one of a series of unit construction twin cylinder Birmingham Small Arms Company (BSA)  motorcycles made in the 1960s. A version branded as the A65 'Thunderbolt Rocket' was aimed at the US market.  The A65R Rocket was produced from 1964 but was stopped in 1965 when all development at BSA was halted by financial difficulties.

Development
The A65R was a development of the old model range led by Bob Fearon, managing director and General Manager of BSA and Chief Development Engineer Bert Perrigo they developed the unit construction Star twins.
To make the A65R more of a 'sports version' of the original BSA A65 Star (and in anticipation of more stringent noise control legislation) it was given 'siamesed' two-into-one exhaust pipes with a special baffle, as well as chrome plated mudguards and headlight brackets. Able to cruise at 85 mph (137 km/h) and with a top speed of 108 mph (174 km/h) it was sold as the fastest BSA in production.

For the 1964 Isle of Man TT races, the BSA factory supplied the travelling Marshals with A65Rs, specially modified to be more 'racing-style' with lower handlebars, rear-set foot controls and a seat having a rear hump. A special version of the A65 branded as the A65T/R 'Thunderbolt Rocket' was aimed at the US market and featured high rise handlebars and a smaller fuel tank.

By 1965 competition from motorcycle producers such as Honda were eroding BSA's previously rising sales figures. BSA's marketing team was slow to respond and new motorcycle development contributed to substantial losses, so by 1972 the company was absorbed into Manganese Bronze Holdings in a rescue plan initiated by the Department of Industry. A plan to combine Norton, BSA and Triumph failed through poor industrial relations and the BSA factories closed.

BSA Lightning Rocket

The BSA Lightning Rocket was a highly tuned version of the BSA A65R Rocket and featured twin Amal 389/206 carburettors and high compression pistons  combined with an optional close ratio gear box to give lively acceleration. 
The Lightning Rocket had a slimmer fuel tank and mudguards - with extra chrome.  From 1965 the Lightning Rocket was discontinued in the UK.

References

External links
 A65 Rocket restoration project

A65 Rocket
Motorcycles introduced in 1964
Motorcycles powered by straight-twin engines
AMEC (disambiguation). AMEC may refer to:
Amec Foster Wheeler, a global consultancy, engineering and project management company headquartered in London, United Kingdom
Association of Mining & Exploration Companies, the trade association for companies mining in Australia
African Methodist Episcopal Church, a predominantly African-American Methodist denomination based in the United States
Advanced Micro-Fabrication Equipment, an Asia-based manufacturer of microfabrication equipment for the semiconductor and adjacent industries.
Arctic Military Environmental Cooperation, a joint Norwegian, Russian, and American government consortium (later joined by the British) to deal with military environmental issues, mainly the decommissioning of Russian nuclear-powered vessels
Afro-Middle East Centre, a Johannesburg-based think tank with a Middle East focus
Herbert Wagner (physicist). Herbert Wagner (born 6 April 1935) is a German theoretical physicist, who mainly works in statistical mechanics. He is a professor emeritus of Ludwig Maximilian University of Munich.



Biography
Wagner was one of the last students of German theoretical physicist and Nobel prize winner Werner Heisenberg, with whom he worked on magnetism.

As a postdoc at Cornell University, he and David Mermin (and independently of Pierre Hohenberg) proved a "no-go theorem", otherwise known as the Mermin–Wagner theorem. The theorem states that continuous symmetries cannot be spontaneously broken at finite temperature in systems with sufficiently short-range interactions in dimensions .

Wagner is the academic father of a generation of statistical physicists. Many of his students and junior collaborators now occupy chairs in German universities, including
Hans Werner Diehl (Essen),
Siegfried Dietrich (Wuppertal, then Max-Planck-Institut für Metallforschung Stuttgart),
Gerhard Gompper (Forschungszentrum Jülich),
Reinhard Lipowsky (Max Planck Institute of Colloids and Interfaces, Berlin),
Hartmut Löwen (Düsseldorf),
Klaus Mecke (Erlangen),
and Udo Seifert (Stuttgart).

Awards
In 1992, Wagner was awarded an honorary degree by the University of Essen (now University of Duisburg-Essen). In 2016 he received the Max Planck Medal for his fundamental works on the statistical physics of low-dimensional systems.

References

20th-century German physicists
1935 births
Academic staff of the Ludwig Maximilian University of Munich
Living people
Theoretical physicists
German theoretical physicists
Mathematical physicists
Winners of the Max Planck Medal
Alpaero Choucas. The Alpaero Choucas (English: Jackdaw) is a French two seat, single engine tailless kit-built ultralight motor glider.  At least 12 are flying, with more under construction.

Design and development
The Choucas is the fourth design by Claude Noin and is sometimes referred to as the Noin Choucas.  It is an ultralight, initially produced in kit form for home assembly, though since 2005 flight-ready aircraft have been an option.

It is a single-engine tailless aircraft of similar layout to the Fauvel AV.22: short, with fin and rudder but no horizontal stabiliser and a mid-mounted wing with mild forward sweep at mid-chord, carrying 4° of dihedral.  The aerofoil has reflex camber and a thickness/chord ratio of 17%.  The wing leading edge is straight and unswept, and the centre section has almost constant chord, but outboard the trailing edge has marked forward sweep. The main spar is carbon fibre, supporting glass fibre-reinforced styrofoam ribs with a plywood-covered D-section box at the leading edge. The rest of the wing is Dacron-covered.  An option extends the span by 0.65 m to 15 m and includes winglets. Outboard ailerons provide lateral control and centre section moulded carbon fibre elevators, assisted by trim tabs, control pitch.  Spoilers, at about mid-chord on the wing upper surface and just outboard of the centre section, also act as airbrakes.

The standard fuselage is formed from two carbon fibre half shells, though glass fibre may be used as a heavier alternative.  Seating is side by side under a one-piece, upward-hinging canopy.  The rudder is large but not balanced or tabbed.  The Choucas has a tailwheel undercarriage with outward-curving faired main legs cantilevered from the lower fuselage, carrying spatted wheels.

The Choucas is powered by a 37 kW (50 hp) Rotax 503 or Hirth two-stroke powerplant or a 60 hp (45 kW) HKS 700E four-stroke piston engine, driving a two-bladed carbon fibre propeller. A folding propeller, with parked blades parallel and pointing forwards, is available for better unpowered gliding. The second prototype, which incorporates this feature, also has detachable winglets and a rudder, deepened to below the lower fuselage line, which incorporates the tail wheel.

Operational history
The Choucas first flew in February 1996, followed by a second aircraft in 2004.  By 2007 two further Choucas were being built. In 2011 twelve powered by the HKS 700E were reported flying.

Specifications

References

1990s French sport aircraft
Motor gliders
Mid-wing aircraft
Aircraft first flown in 1996
Israel Diamond Exchange. Israel Diamond Exchange Ltd., located in the Tel Aviv District city of Ramat Gan, Israel, is the world's largest diamond exchange and the centre of Israel's diamond industry. The exchange is a private company that incorporates about 3100 members; these diamantaires are engaged in diamond cutting and trading - marketing, brokerage, import and export.

The exchange operates from a complex of four buildings in area known as the Diamond Exchange District; the buildings are connected by bridges creating one complex, which contains the world's largest diamond trading floor; consisting of 1000 office rooms, restaurants, banks, post, and package delivery services.

History
The first diamond cutting facility was opened in 1937 (Mandatory Palestine at the time), in Petach Tikva by two cousins Asher Anshel Daskal and Zvi Rosenberg professional diamantaires trained in Antwerp, originally from Romania during the British Mandate. The industry grew over the next seven years, but between 1944 and 1948 it suffered from the increasing lawlessness and in February 1948 closed down completely, with seemingly little chance of recovery.

After a new start and renewed growth, by the 1960s a trade association was established, which later evolved into the Diamond Exchange.

From 1967 to 1993 Moshe Schnitzer was President of the IDE, which grew rapidly under his direction. Exports of polished diamonds from Israel during this period increased from $200 million to $3.4 billion a year.

In 1968, the first building in the complex was opened: the 22-story Shimshon Tower, at the time one of the tallest buildings in Israel. During the 1980s, the Maccabi Tower and Noam Tower were constructed and in 1992 the tallest building in the complex was opened, the 32-story Diamond Tower.

Trading
For many years the supply of rough diamonds was dominated by the Diamond Trading Company Sightholders, a selected group authorised bulk purchasers of rough diamonds (which includes also about 10 Israeli diamantaires, controlled by the De Beers Group, the single largest producer and purveyor of rough diamonds in the world. During the 1990s the stronghold of De Beers Group was weakened by diamond traders who engage directly with diamond producers in Russia and Africa.

See also
 Moshe Schnitzer, key player in the international diamond trade, from 1967–1993 President of the Israel Diamond Exchange
 Dan Gertler
 Lev Avnerovich Leviev

References

External links
  Israel Diamond Exchange

Companies based in Ramat Gan
Diamond exchanges
Diamond cutting
Diamond industry in Israel