omniomni/omni-engineering huggingface dataset:
Pawnee Warrior. The Pawnee Warrior was an American helicopter that was designed and produced by Pawnee Aviation of Longmont, Colorado. Now out of production, when it was available the aircraft was supplied as a kit for amateur construction.

Design and development
The Warrior was designed to comply with the US Experimental - Amateur-built aircraft rules. It featured a single  diameter two-bladed main rotor, a two-bladed tail rotor, both made from single metal extrusions. The kit's drive components were intended to be supplied complete and ready to install. The aircraft had a single-seat open cockpit without a windshield and skid-type landing gear. A cockpit enclosure was optional. The standard engine used was a twin cylinder, air-cooled, two-stroke, dual-ignition  Hirth 2706 powerplant.

The aircraft fuselage was made from steel and aluminum tubing and supplied in three major bolt-together sub-assemblies. It had an empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload for the pilot and baggage was .

The manufacturer estimated the construction time from the planned assembly kit as 80 hours.

The company said "the Warrior was used [as] a proof of concept platform to develop new models" and was followed by the two place Pawnee Chief.

Operational history
By 1998 the company reported that one aircraft had been completed and was flying.

By April 2015 no examples were registered in the United States with the Federal Aviation Administration and it is likely that no examples exist any more.

Specifications (Warrior)

See also
List of rotorcraft

References

Warrior
1990s United States sport aircraft
1990s United States helicopters
Homebuilt aircraft
Single-engined piston helicopters
Adrian Gray (artist). Adrian Gray (born in Bristol in 1961) is a British artist  who creates stone balancing sculptures.  His career started in 2002.

Gray's work is predominantly sculpture based on balancing natural elements. He creates sculptures using naturally weathered stone, usually on location by the coast. 

To show live examples of his work Gray performs demonstrations where he creates new sculptures on site. Gray's sculptures for the garden and indoors are previously balanced compositions fixed permanently in position. 

Since 2015 he has also been creating monumental sculptures weighing many tons, balancing them with large cranes. The owners of the sculptures receive a film of their creation.

In 2015 a book about Gray's work was published in the UK. "The Art of Stonebalancing" includes his biography plus photographs by Gray and other photographers.

Exhibitions and events 
 RHS Chelsea Flower Show 2015, 2016, 2017, 2018 and 2019.
 In 2015 Gray completed a 14-tonne stonebalancing sculpture, "Trust in Nature". More than five metres tall and made of two Bodmin granite boulders, it was first assembled on Bodmin Moor, where it remained for a week. Gray then moved it to the RHS garden at Rosemoor in Devon for their winter sculpture exhibition and also took the piece to London for the RHS Chelsea Flower Show 2016. The balancing process on Bodmin was filmed for BBC1's The One Show and broadcast on 25 November.
 Gray worked with photographer Mikael Buck to create a series of images for the Isle of Man Tourism Division. The photos show Gray's stone balancing sculptures in natural locations on the island, and were released on 14 July 2015.
 Featured on Channel 4's 'Grand Designs'

 Dorset Arts Week 2010
 Appeared on 'Country Tracks' with Jodie Kidd, BBC1 10 December 2010
 Hartlepool town gallery, solo show September 2012

References

External links 
 Website

British artists
1961 births
Living people
Aviation in Florida. The first aeronautical event in Florida was presented on January 28, 1878, when a balloon flew over Jacksonville. Florida has since hosted four major aviation events.

Events 
January 1914 - St. Petersburg-Tampa Airboat Line becomes the first airline in the world using heavier-than-air vehicles.
December 1916 - Navy takes delivery of its first airship, the DN-1
April 1, 1926 - Florida Airways starts Commercial Air Mail (CAM) Service.
Sun 'n Fun air show started in 1974.

Aircraft manufacturers 
Comp Air - Merritt Island, Florida
Piper Aircraft - Vero Beach
Progressive Aerodyne - Tavares, Florida

Aerospace 
Florida Institute of Technology
Embry–Riddle Aeronautical University

Airports 
 List of airports in Florida

Commercial service 
Air Florida based in Florida from 1971 to 1984
Red Arrow Flying Service - Chalk's Ocean Airways - Chalk's International Airlines founded in Miami in 1917.
National Airlines founded in 1934.

Organizations 
Florida Aviation Association - Founded in 1936 in Orlando
Space Florida

Government and military
Florida Department of Transportation 
The National Oceanic and Atmospheric Administration bases its aircraft at the Aircraft Operations Center in Lakeland.

Museums 
 Air Force Armament Museum, Valparaiso, Florida
 Air Force Space and Missile Museum, Cape Canaveral Space Force Station
 Airport Museum (Melbourne, Florida)
 DeLand Naval Air Station Museum, DeLand, Florida
 Fantasy of Flight, Polk City, Florida
 Florida Air Museum, Lakeland, Florida
 Kennedy Space Center Visitor Complex, Merritt Island, Florida
 Kissimmee Air Museum
 National Naval Aviation Museum, Pensacola, Florida
 United States Astronaut Hall of Fame, south of Titusville, Florida
 US Space Walk of Fame, Titusville, Florida
 Valiant Air Command Warbird Museum, Titusville, Florida
 Wings of Dreams Aviation Museum, Keystone Heights, Florida
 Wings Over Miami, Tamiami Airport, Miami

References 

 
Transportation in Florida
Sairam Institutions. The Sairam Institutions began in 1989 with the start of Sai Matriculation Higher Secondary School in Chennai with just 137 students. Today the Sairam family encompasses more than a dozen institutions including School, Engineering colleges, Medical colleges, Teacher Training institutes and Polytechnic.

Sairam Group

Engineering Colleges
Sri Sairam Engineering College - Tambaram, Chennai, Tamil Nadu Official Website
Sri Sairam Institute of Technology - Tambaram, Chennai, Tamil Nadu Official Website
Sri Sairam College of Engineering, Anekal, Bengaluru (Near Hosur) Official Website

Medical Colleges
Sri Sairam Siddha Medical College - Tambaram, Chennai, Tamil Nadu		
Sri Sairam Ayurveda Medical College - Tambaram, Chennai, Tamil Nadu		
Sri Sairam Homoeopathy Medical College - Tambaram, Chennai, Tamil Nadu

Schools
Sai Matriculation Higher Secondary School -Madipakkam, Chennai
Sairam Matriculation Higher Secondary School -Tambaram, Chennai
Sairam Matriculation Higher Secondary School, Thiruthuraipoondi
Sairam Matriculation Higher Secondary School, Thiruvarur
Sairam Vidyalaya (CBSE Syllabus) - Madipakkam, Chennai
Sairam Leo Muthu Public School (CBSE Syllabus)-  Medavakkam, Chennai
Sairam Vidyalaya (CBSE Syllabus) - Madurai
Sairam Vidyalaya (CBSE Syllabus) - Puducherry

Polytechnic Colleges
Sri Sairam Polytechnic College - Tambaram
Sri Sairam I.T.I.,-Vedachandur, Dindigul District
Sai Jothi Polytechnic College - Madurai

Management Studies
Sri Sairam Institute of Management Studies, Chennai, Tamil Nadu

Research Centre
Sai Ram Advanced Centre for Research, Chennai,  Tamil Nadu

Pre-University
Sri Sairam Pre-University College, Anekal, Bengaluru

Teacher Training Institute
Sri Sairam College of Teacher Training-Puducherry

Affiliations
Directorate of Technical Education, Government of Tamil Nadu
 Anna University, Chennai
Directorate of School Education, Government of Tamil Nadu
 The Dr.MGR Medical University, Chennai

External links
Sairam TIES 2015
Sairam Institutions - Leo Muthu Indoor Stadium  by Little Master Sachin Tendulkar
Sai Ram Group of Institutions - Video
Sri Sai Ram Engineering College IEEE Students Chapter
About Sri Sai Ram Engineering College on Anna University

Engineering colleges in Chennai
RV Bilim-2. The RV  Bilim-2 is a Turkish research vessel owned by the Middle East Technical University in Ankara and operated in deep waters by its Institute of Marine Sciences based in Erdemli, Mersin, Turkey.

She was built by Istanbul Naval Shipyard in Pendik, Istanbul and launched in 1983 as RV Bilim (Turkish for "Science"). In 2006, she was renamed Bilim-2. She is the institute's main ship beside its two other smaller wooden-hull research boats, the 1979-built RV Erdemli and the 1981-built RV Lamas-1.

Bilim-2 is equipped with a hydraulic trawl winch of 7.5 tonnes and 2 x  wire capacity and a hydraulic net winch of 6-tonne capacity for fisheries and marine biological investigations. Marine geological studies are conducted using a shallow seismic system of type EG&G Uniboom, side-scan sonars, and various corers. A remotely operated underwater camera (Mini Rover Benthos MK II) is also utilized in seafloor surveys.

Characteristics

Vessel
Bilim-2 is  long, with a beam of  and a max. draft of . Assessed at ,  and 190 NT, the ship is propelled by a  diesel engine of MWM GmbH and variable-pitch propeller. She has a top speed of  with  in service. The vessel has a range of .

The vessel has a global positioning system (GPS), a conventional radar with a range of  for navigation and modern communication equipment. The ship has twelve crew, and can host up to fourteen scientists aboard. She can sail autonomously 45 days at sea.

Her home port is Erdemli in Mersin Province, southern Turkey. However, efforts are underway to allow her mooring directly at the quay before the institute in Erdemli.

Instrumentation
Operated by using a hydrographic winch with a cable, a CTD profiling system of Sea-Bird Model 9 and a rosette sampler with twelve bottles each five liter of General Oceanics are used for gathering physical and chemical data from the sea. An automatic Winkler titration system, an AutoAnalyzer, a spectrofluorometer, an irradiance meter and various other instruments are available for chemical and nutrient analyses in the labs on board the vessel. Data collection and processing is carried out in the computer room.

Service
In 2010, Bilim-2 was tasked by the Ministry of Food, Agriculture and Livestock with a project for "Acoustic determination of anchovy stock and establishing a  continuous monitoring method" as part of the "National Fisheries Data Collection Program". For this study, she operated in Black Sea coast from İğneada in the west to Hopa in the east during the fishing seasons beginning in 2011.

Anchovy makes out about 60% of all fish caught in Turkey. In the 2011 fishing season,  200,000 tonnes of anchovy were caught while around 70,000 tonnes remained left in the sea. The fishing season for anchovy diminished in the last years to about one month in contrast to the same in the  1970s and 1980s when it lasted from November to May. Before the 2000s, the anchovy stock amounted to one-and-half million tonnes, according to experts.

See also
List of research vessels of Turkey

References

Research vessels of Turkey
Ships built at Istanbul Naval Shipyard
1983 ships
Middle East Technical University
Erdemli District
Pawnee Aviation. Pawnee Aviation was an American aircraft manufacturer initially based in Longmont, Colorado and later in McCook, Nebraska. The company was founded in the mid-1990s by Ron Willocks and specialized in the design and manufacture of helicopters in the form of kits for amateur construction.

The company's first product was the Pawnee Warrior, first flown by 1998. It was simple open frame, single seat helicopter that was used as a "a proof of concept platform" for the development of the later, two seat Pawnee Chief. The Chief was first flown in December 2005 and was the subject of a protracted development process. The company explained the long development time, "we were determined not to put a product on the market before its time. We have seen other kits sold that did not complete their development and testing.  Their customers paid for completion of the development and in reality did much of their testing. By delaying our availability project until it was truly completed, we will avoid placing unnecessary a lot of "Airworthiness Directives" and flight restrictions on our aircraft."

The company intended to put the Chief into production in January 2006 at a rate of eight to ten kits per month and increase staff above the five employees already working. On 28 September 2006 a Chief crashed while hovering and burned, with only minor injuries to the pilot and passenger. The National Transportation Safety Board determined the cause to be, "failure of the welded bracket caused the loss of input control authority from the cyclic control to the main rotor." The company seems to have gone out of business in late 2008.

Aircraft

References

External links
Company website archives on Archive.org

Defunct aircraft manufacturers of the United States
Ultralight aircraft
Homebuilt aircraft
Helicopters
Manuel Menezes. Manuel Menezes ICS (15 February 1922 – 15 June 1996) was an Indian business executive, engineer, and chairman of the  Indian Railway Board. Having worked for Indian Railway Board, he eventually rose to the position of chairman, holding the rank of principal secretary in the Indian Civil Service.

Personal life
Manuel Menezes was born in Goa, Portuguese India; his parents hailed from Bardez, Goa. He had four children, Michael Menezes, Marisa Mascarenhas, Ivan Menezes, CEO of Diageo, and Victor Menezes, former senior vice chairman of Citigroup. He died on 15 June 1996.

References

1922 births
1996 deaths
Engineers from Goa
Indian business executives
Martin XNBL-2. The Martin XNBL-2 was a 1920s biplane night light bomber proposal by the Glenn Martin Company for the United States Army Air Service.  Two prototypes were ordered in 1922, but cancelled before construction began, due to lack of funding.

Specifications

References 

Martin aircraft
1920s United States bomber aircraft
Twin piston-engined tractor aircraft
Biplanes
Aircraft with fixed conventional landing gear
Cancelled military aircraft projects of the United States
History of limnology in Nepal. The history of limnology in Nepal focuses on the study of limnology in Nepal, which has been done by many foreign and Nepali researchers and students of Tribhuvan University.

Parameters 
The research was done mainly on the following parameters:
 pH
 aquatic plants and their types
 composition of fresh water
 water and land relationship
 seasonal changes in the lakes

Studies 
 In 1970 The first study was done by  a German limnologist L.Loffler in Khumbu area.
 In 1980 there were 20 studies.
 Until 1990 the number of studies were 20.
 From 2001–2009 76 studies were done in lakes and ponds like Tilicho Lake, Rara Lake. The first study on Tilicho was in 1959.

Field laboratory 
"In April 1977 work was started on a laboratory office building. This was ready for use in September 1977. The building offers sufficient space, a good laboratory bench with power outlets, etc. A library room is also provided. However, the building might prove unsatisfactory for continuing activities if leakage problems are not attended to."
Upon establishment of the laboratory some of the equipment and tools included were a stereo microscope, microscope, top pan balance, "a Hachkit for simple chemical analysis and a refrigerator".
 Later other equipment was procured including a hydrographic winch, rubber dinghy, portable echosounder, laboratory glassware, and specimen jars.

See also 
 List of rivers of Nepal
 List of lakes of Nepal

References

External links 
  Study of Himalayan Lakes in Nepal 

Limnology
Water in Nepal
A/B sound system. An A/B sound system is a type of sound reinforcement system or public address system. Unlike a more typical sound reinforcement system, an A/B sound system provides two electrically isolated signal paths from microphone to speaker, resulting in a system where signals from two microphones only interact acoustically and never interact electronically. This is accomplished by placing two separate loudspeakers at each speaker position and feeding the two speakers separate signals from separate microphones. The purported benefit of such a system is a reduction in phase cancellation and intermodulation distortion, and an improvement in speech intelligibility when two microphones are used simultaneously. A/B sound systems are unusual because they require double the speakers and therefore have double the cost.

Origins
The development of the A/B sound system is credited to Martin Levan in 1988.

Applications
Venues with A/B sound systems effectively have two separate sound systems which can be used simultaneously. Deciding what to do with such a system is generally an artistic rather than a technical decision, and so the decision is made by the Sound designer. 

An article describing an A/B system installed in the Helsinki City Theatre provides two potential uses for an A/B system: "One system provides the A mix of vocals, while the second system, in nearly the same position, provides the B mix of band and orchestra. The system is also useful when two singers are in close proximity, and placing them in different mixes can help avoid sonic anomalies caused by leakage between lavalier mics."

In an article describing the sound system for a touring opera, Michael Bodeen says, “I decided on an A/B vocal system, which would allow me to assign each child in the chorus to one of two matrixes. This made a complicated setup, but it helped reduce or eliminate the comb-filtering effect.”

An A/B system is used in the Avon Theatre at the Stratford Festival in Canada. Stratford Festival sound designer William Fallon said, "I've found that it has also helped in creating separation and clarity in large production numbers, by being able to send half the cast down one path and the other half down another, either based on parts, blocking, leads vs ensemble, etc."

References

Sound technology
Dittmar HD 153 Motor-Möwe. The Dittmar HD 153 Motor-Möwe was a West German light aircraft that was first flown in November 1953.

Design and development
The Motor-Möwe, designed by Heini Dittmar who had designed the Dittmar HD 53 Möwe sailplane, was a motorized development of this sailplane and was initially designed to be powered by engines of .  The HD 153 prototype was a two-seat side-by-side high wing monoplane powered by a  Continental A65 engine and was of wooden construction with detachable wing and tail assemblies to facilitate road transportation when needed. A second prototype aircraft was fitted with a  Hirth engine.

Operational history
The aircraft was designed for private and club use and served as a trainer and glider tug. Heini Dittmar, the aircraft’s designer, was killed in 1960 when his Motor-Möwe crashed near Essen/Mulheim airport. Small numbers of the type were completed by the end of 1960 and on 1 January 1961 four HD 153 and four HD 156 Motor–Möwen appeared in the West German civil aircraft register. I 1965 four HD 153 and five HD 156 Motor-Möwen were registered in West Germany. By 2007, no examples were known to be active.

Variants

 HD 153  two-seat aircraft
HD 153A-1production two-seaters
 HD 156  three-seat aircraft fitted with additional side windows

Specifications (HD 153 with C90 engine)

References

External links

 28-APR-1960 Heini Dittmars fatal test flight
 11-APR-1959 wing separated during descent after glider towing

1950s German civil utility aircraft
High-wing aircraft
Single-engined tractor aircraft
Aircraft first flown in 1953
Fidgetin-like 2. Fidgetin-like 2 (FL2) is a human enzyme that slows the rate at which skin cells migrate to wounds to heal them. If this enzyme is suppressed/absent, skin cells move faster, speeding the healing process.

Delivery 

Molecules of silencing RNA (siRNA) that bind to a gene's messenger RNA (mRNA) can inhibit the production of FL2, but siRNAs require protection from degradation in order to reach a wound site.

In 2015, researchers disclosed the successful use of nanoparticles to ferry siRNA molecules to their intended targets, reducing healing times in mice with skin excisions or burns. The result was normal, well-orchestrated tissue, including hair follicles and supportive collagen network.

References

External links 
 NCBI 401720
 Uniprot A6NMB9
 Mouse gene informatics: 3646919

Nanotechnology
Enzymes
Code Louisville. Code Louisville is a public–private partnership program in Louisville, Kentucky, with the aim of fostering software developers to bolster technological innovation in the region. It received national attention in April 2015 when President Barack Obama visited the region to announce TechHire and promote the value of the federal government working with local governments.

Purpose
Code Louisville is a public–private partnership program in Louisville that began in November 2013. Metro Louisville Department of Economic Growth and Innovation, Greater Louisville Inc., EnterpriseCorp, the Louisville Free Public Library, and KentuckianaWorks are partnered with local employers partner who hire graduates of the program. It is a free 12-week online coding course open to those with a library card. It aims to foster software developers in the area, so as to bolster a technological innovation in the region. The program works in collaboration with Treehouse, including a prerequisite course.

Effectiveness
The program has been lauded for its success compared to similar programs in other cities. In April 2015, President Obama visited Louisville to praise the program and to use it as an example of the federal TechHire initiative that provides grants to similar programs. In 2015, it was announced that Code Louisville would attempt to create a program to teach others cities how to run similar programs.

See also 
 Public-private partnerships in the United States

References

Economy of Louisville, Kentucky
Public–private partnership projects in the United States
2013 establishments in Kentucky
Computer science education
Education in Louisville, Kentucky
Projects established in 2013
Raven Explorer I. The Raven Explorer I is an American autogyro that was designed and produced by Raven Rotorcraft of Boulder Colorado and later El Prado, New Mexico, introduced in the 1990s. Now out of production, when it was available the aircraft was supplied as a kit, for amateur construction.

The Explorer I is no longer available as the company has moved to develop the two-seat Raven Rotor-Plane.

Design and development
The Explorer I was designed as a low-cost utilitarian autogyro. It complies with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of . The aircraft has a standard empty weight of . It features a single main rotor, a single-seat open cockpit without a windshield and conventional landing gear. A cockpit fairing was a factory option. The acceptable power range is  and the standard engine used is the twin cylinder, air-cooled, two-stroke, single-ignition  2si 460 engine in tractor configuration. The cabin width is .

The aircraft fuselage is made from a combination of welded 4130 steel tube and bolted-together aluminum tubing. Its two-bladed rotor has a diameter of . The aircraft has a typical empty weight of  and a gross weight of , giving a useful load of . With full fuel of  the payload for the pilot and baggage is .

The standard day, sea level, no wind, take off with a  engine is  and the landing roll is .

The manufacturer estimated the construction time from the supplied kit as 100 hours.

Specifications (Explorer I)

See also
List of rotorcraft

References

External links

Photo of a Raven Explorer I

Explorer I
1990s United States sport aircraft
1990s United States ultralight aircraft
1990s United States civil utility aircraft
Homebuilt aircraft
Single-engined tractor autogyros