omniomni/omni-engineering huggingface dataset:
William F. Hamilton (professor). William F. Hamilton (born 1941) is an American professor. He is the Ralph Landau Professorship of Management and Technology at the University of Pennsylvania and a management consultant. Hamilton is a pioneer and advocate of joint-degree programs of business and engineering. He started the Management and Technology Program in 1977 and founded the Jerome Fisher Program in Management and Technology in 1978. Hamilton served as Director of the Jerome Fisher Program in Management and Technology in the Wharton School and the School of Engineering and Applied Science at the University of Pennsylvania until his retirement in 2015. He co-founded the Department of Operations and Information Management at Wharton. He participated in the creation of Penn's Weiss Technology House, Wharton's Program in Emerging Technologies, and the Executive Masters Program in Technology Management in the Engineering School.

References

Alumni of the London School of Economics
Wharton School alumni
Living people
1941 births
University of Pennsylvania School of Engineering and Applied Science alumni
University of Pennsylvania faculty
St. Louis PT-LM-4. The St. Louis PT-LM-4 was a primary trainer design for use in the Civilian Pilot Training Program of World War II.

Design
The PT-LM-4 was a low-wing, open cockpit, tandem seat, trainer with conventional landing gear, powered by a  Ranger 6-440C-3 engine. The fuselage was constructed of welded steel tubing with aluminum skins. The wings used aluminum construction with aircraft fabric covering. Fairchild won the training contract, with St. Louis Aircraft Company building licensed versions of the PT-19 instead.

Specifications (PT-LM-4)

See also

References

1940s United States military trainer aircraft
St Croix Aircraft. St Croix Aircraft, was an American manufacturer of wooden propellers for homebuilt and ultralight aircraft and a supplier of aircraft plans and kits. The company headquarters was located in Corning, Iowa.

The company's propellers were constructed from birch, maple and walnut and available in with two to five blades, in diameters up to  for engines up to 

St Croix is probably best known for its Excelsior ultralight aircraft design.

Aircraft
Aerial
AirCamper
Excelsior
Sopwith Triplane

See also
List of aircraft propeller manufacturers

References 

Aircraft propeller manufacturers
Aerospace companies of the United States
The Metal Airscrew Company. The Metal Airscrew Company was formed in 1919 by Dr. Henry Charles Watts and Henry Leitner to produce hollow metal aircraft propellers with a method set out in their joint patent. By 1928 the company name had changed to Metal Propellers Ltd.  It remained active until at least 1930.

History

The Leitner-Watts propellers were amongst the earliest with a thick metal aerodynamic profile. Watts was the aerodynamicist who determined the blade profile, Leitner the engineer who translated it into metal and designed hubs for two, three and four bladed propellers.  The blades were produced in the Rubery Owen factory in Darlaston, Staffordshire.  Each blade side or shell was made up from three laminations of steel sheet, shaped in a press.  The outer layer formed the complete shell shape and the progressively shorter, Y-shaped inner laminations strengthened the bade towards the root.  The laminations were riveted or spot-welded together and the two shells welded together at their edges. To stiffen the blade, small shouldered cylindrical struts were then inserted through the face and externally soldered at each end.  The hubs allowed easy ground adjustment of pitch to any angle; if  one blade was damaged, it could easily be replaced.

These early metal propellers were ground tested at RAE Farnborough then test flown on a Bristol Tourer seaplane. In 1922 they were fitted to the Napier Lion engine of the de Havilland DH.18 airliner.

At an extraordinary general meeting on 28 January 1926 the company decided that it should be wound up voluntarily and they appointed a liquidator. In January 1927 a final general meeting was called to receive the liquidators report and close the company.

Around 1928, the company reformed as Metal Propellers Ltd, with board members who also had positions with Saunders-Roe, Spartan Aircraft Ltd and British Airways.  Watts remained as chief designer from 1925-7 but moved to The Airscrew Company in 1932.  Metal Propellers continued to advertise until at least December 1930.
Metal Propellers Ltd were still sending apprentices to Saunders-Roe on the Isle of Wight for an initial training year in the mid 1950s.

Applications
Bristol Berkeley
Bristol Seely
Bristol Tourer
de Havilland DH.18
Handley Page Handcross
Morane-Saulnier AV
Westland Yeovil

See also
List of aircraft propeller manufacturers

References 

Aircraft propeller manufacturers
Aerospace companies of the United Kingdom
Manufacturing companies established in 1919
Technology companies established in 1919
Sensenich Propeller. Sensenich Propeller, founded in 1932, is an American manufacturer of wood, metal and composite propellers for certified, homebuilt and ultralight aircraft, and unmanned aerial vehicles, as well as airboats. The company headquarters is located in Lititz, Pennsylvania.

The company was initially established in 1932 as Sensenich Brothers to make aircraft propellers. The company is particularly known for its wooden aircraft propellers, but also has produced fixed-pitch metal props since 1948, and in recent years expanded to adjustable-pitch carbon-fiber composite propellers. Throughout the mid-20th century, Sensenich wood props were available on nearly all 1-seat and 2-seat U.S.-made aircraft, many of which still operate today. 
Sensenich expanded into airboat propellers in 1949, establishing a second factory for that market at Plant City, Florida under the name Sensenich Wood Propeller Company. (Wood prop manufacturing is now handled in their Florida facility.)

See also
List of aircraft propeller manufacturers

References

External links 

"How Sensenich Wooden Props Are Made," AvWeb on YouTube

Aerospace companies of the United States
Aircraft propeller manufacturers
Manufacturing companies established in 1932
Sterba Propellers. Sterba Propellers, also called Ed Sterba Propellers, Sterba Propeller Company and Edward Sterba Aircraft Propellers was founded by Edward Sterba. It is an American manufacturer of wooden propellers for homebuilt and ultralight aircraft. The company headquarters is located in Holmes Beach, Florida.

The company specializes in propellers for Volkswagen air-cooled engines used in aircraft for recreational flying and air racing.

See also
List of aircraft propeller manufacturers

References

External links 
Official website archives on archive.org

Aircraft propeller manufacturers
Aerospace companies of the United States
Companies based in Manatee County, Florida
Manufacturing companies of the United States
Manufacturing companies based in Florida
Vari-Prop. Vari-Prop, founded in 2004 by Larry Morgan, was an American manufacturer of composite propellers for homebuilt and light-sport aircraft. The company headquarters was originally located in Cottonwood, California and later in Beaverton, Oregon.

The company's line of propellers started development in 1988 and consisted of variable-pitch, ground-adjustable and constant-speed propellers.

By 2016 the company's website was for sale and the company business seems to have been wound up.

See also
List of aircraft propeller manufacturers

References

External links 
Official website archives on Archive.org

Manufacturing companies established in 2004
Aircraft propeller manufacturers
Aerospace companies of the United States
Companies based in Beaverton, Oregon
2004 establishments in California
Manufacturing companies disestablished in 2016
2016 disestablishments in Oregon
American companies established in 2004
American companies disestablished in 2016
Whirl Wind Propellers. Whirl Wind Propellers Corporation, is an American manufacturer of composite propellers for homebuilt and light-sport aircraft. The company headquarters is located in Piqua Ohio.

The company makes composite ground adjustable aircraft propellers as well as replacement blades for the Nanchang CJ-6's V530 propeller and also airboat propellers.

See also
List of aircraft propeller manufacturers

References

External links 

Aircraft propeller manufacturers
Aerospace companies of the United States
Companies based in El Cajon, California
Hill Tetra-15. The Tetra-15 is an American mid-wing, single-seat, kit-built glider that was designed by Bob Kuykendall, Steve Smith, and Brad Hill, and built primarily by Brad Hill, Bob Kuykendall, and Doug Gray.

Design and development
The Tetra-15 is the first aircraft produced from the tools and development of the HP-24 project, a project to develop and manufacture a high-performance sailplane in kit form.

The aircraft is predominantly made from carbon fiber. The wings have airfoils from the FX81 family of profiles. The wing spars use pultruded carbon fiber ribbons in the upper and lower caps. Glide path control is via mechanically actuated Schempp-Hirth style airbrakes. All wing and tail controls are automatically connecting. The retractable undercarriage is likewise manually actuated.

Operational history
The Tetra-15 first flew on Friday 27 January 2012.

By December 2016 one example had been registered in the United States with the Federal Aviation Administration.

Specifications

See also

References

United States sailplanes
Homebuilt aircraft
Samuel Brees. Samuel Charles Brees ( 1810 – 5 May 1865) was a New Zealand artist, surveyor and engineer. He was born c.1810. He was employed by the New Zealand Company and succeeded in his role William Mein Smith. Brees died at sea on the La Hogue off Blackwall, London.

References

1810s births
1865 deaths
New Zealand engineers
New Zealand surveyors
19th-century New Zealand engineers
19th-century New Zealand artists
Philip Blakeley. Philip William Blakeley  (3 April 1915 – 31 May 1994) was a New Zealand electrical engineer and engineering administrator. He was born in Lower Hutt, New Zealand, on 3 April 1915. He married Ida Rogers, the daughter of Bill Rogers.

In 1977, Blakeley was awarded the Queen Elizabeth II Silver Jubilee Medal. In the 1980 New Year Honours, he was appointed a Commander of the Order of the British Empire.

References

1915 births
1994 deaths
New Zealand Commanders of the Order of the British Empire
20th-century New Zealand engineers
William Newsham Blair. William Newsham Blair M.Inst.C.E. (10 August 1841 – 4 May 1891), was a New Zealand engineer and surveyor. He was born in Kilmeny, Islay, Argyllshire, Scotland on 10 August 1841. He was in the service of the Provincial Government of Otago from 1864 to 1865 whereupon he became district engineer in the Public Works Department of New Zealand in 1871, Engineer-in-charge of the Middle Island in 1878, and Assistant Engineer-in-Chief for the colony in 1884. In 1890 Mr. Blair was appointed Engineer-in-chief, and died on 4 May 1891.

References

External links
 

1841 births
1891 deaths
New Zealand surveyors
Scottish emigrants to New Zealand
20th-century New Zealand engineers
John Blackett (engineer). John Blackett (8 October 1818 – 8 January 1893) was a New Zealand engineer.

Blackett was born and educated in Newcastle upon Tyne. The son of a coal agent, he was a pupil with Messrs. R and W Hawthorn, engineers, 1834–41; draughtsman and office engineer to the Great Western Steamship Company, 1841–44; head engineer in iron shipbuilding and railway work with T. R. Guppy, A.I.C.E., 1844–46; engineer to the Governor and Company of Copper Mines in England at Cwm Avon, South Wales, 1846–48. From 1848 to 1851 he practised privately as an engineer in England.

In 1851 he emigrated to New Zealand, initially to New Plymouth. In 1859 he was appointed Provincial Engineer at Nelson. From April to June 1867, Blackett was appointed onto the Executive of the Nelson Provincial Council. There were attempts to persuade Blackett to stand for election as Superintendent, but he did not consent.

Under Sir Julius Vogel's great Public Works policy he was responsible for road construction throughout the colony from 1870 to 1878; under John Carruthers the Engineer-in-Chief of the Public Works Department who was responsible for railway construction. Blackett also became the Marine Engineer in 1871.

In 1878 he was made Engineer-in-charge of the North Island, and in 1884 Engineer-in-chief of the colony. Blackett then became Consulting Engineer of the Government of New Zealand in London. He was responsible for the location, design and construction of 14 lighthouses around the New Zealand coastline.

Blackett died in Wellington in 1893, and was buried at Karori Cemetery.

The John Blackett Prize was established under the will of his artist daughter, Isabel Mary Houston, and is awarded to outstanding engineering students at the University of Canterbury.

References

Further reading

External links
 The Blacketts of North East England

1818 births
1893 deaths
People from Newcastle upon Tyne
British emigrants to New Zealand
Burials at Karori Cemetery
19th-century New Zealand engineers
New Zealand civil engineers
19th-century British engineers
British civil engineers
Members of Nelson provincial executive councils
Rockbreaker. A rockbreaker is a machine designed to manipulate large rocks, including reducing large rocks into smaller rocks. They are typically used in the mining industry to remove oversize rocks that are too large or too hard to be reduced in size by a crusher. Rockbreakers consist of two major components, a hydraulic hammer (used to break rocks) and a boom (the arm). There are two major types of rock breakers, mobile and stationary - typically placed on a pedestal or slew frame.

Automation
In 2008, researchers from the CSIRO implemented remote-operation functionality for a Transmin rockbreaker located at Rio Tinto's West Angelas iron ore mine from Perth, over 1000 km away.

In 2011, Transmin developed the first commercially available automation system for pedestal rockbreakers. The system was first installed at Newcrest's Ridgeway Deeps gold mine providing collision avoidance and remote operation functionality.

See also
 Breaker (hydraulic)
 Jackhammer
 Excavator

References

Hydraulic tools
Construction equipment
Mining equipment
Australasian Conference on Information Systems. The Australasian Conference on Information Systems (ACIS) is an annual conference for Information Systems and Information Technology academics and professionals and is affiliated with the Australasian Association for Information Systems. ACIS is the premier Information Systems conference within Australia and New Zealand, targeting Information Systems academics and researchers. It covers technical, organisational, business and social issues in the application of Information Technology(IT) to real world problems.

ACIS provides a platform for panel discussions and the presentation of peer-reviewed information systems research papers.

The conference attracts over a hundred submissions each year, and those that are selected for presentation appear in the 'ACIS Proceedings’, which have been archived online since 2001.

The first Australian Conference in Information Systems (ACIS) took place in 1990 at Monash University and was chaired by Ross Jeffery. The name was changed to the Australasian Conference on Information Systems in 1994 to reflect the involvement of New Zealand, and attendance stabilised at approximately 250 delegates by 2007, having reached its peak in 2000.

The ACIS logo consists of a digital pixel background pattern with a human hand silhouette and a swooping arrow.

ACIS Venues

The following table displays a list of past and near future ACIS conferences.

See also
Association for Information Systems
Information Systems
Management Information Systems

References

External links
ACIS E-Library of Proceedings
Association for Information Systems 

Information systems conferences
Harry Atkinson (socialist). Harry Albert Atkinson (15 October 1867 – 21 January 1956) was a New Zealand engineer, socialist and insurance agent. He was born in Urenui, Taranaki, New Zealand on 15 October 1867, and was educated at Nelson College.

References

1867 births
1956 deaths
New Zealand socialists
People educated at Nelson College
20th-century New Zealand engineers
19th-century New Zealand engineers
Atkinson–Hursthouse–Richmond family
Colony of New Zealand people
Percy Angus. Percy Roy Angus (22 September 1893 – 7 July 1961) was a New Zealand railway mechanical engineer, locomotive designer and administrator. He was born in Wellington, New Zealand on 22 September 1893, and died in Lower Hutt on 27 July 1961. 

He served in the New Zealand Army Engineers in World War I. 

He was responsible for the design of rolling stock in the 1930s and 1940s; the NZR K class and the NZR j class locomotives and the NZR Standard (Aotea) class railcars. The very successful K, Ka and Kb class locomotives superseded the unsuccessful NZR G class.  

He joined the  New Zealand Government Railways as a mechanical engineering cadet in Invercargill in 1910, and worked in Addington and Wellington. 

He became assistant chief mechanical engineer in Wellington in 1926, and NZR Chief Mechanical Engineer in 1941, responsible for the Railway workshops and locomotive running branches. He retired in June 1950.

He was President of the New Zealand Institution of Engineers in 1952-1953.

External links

References

1893 births
1961 deaths
20th-century New Zealand engineers
People from Wellington City
New Zealand people in rail transport
20th-century New Zealand public servants
New Zealand Army officers
New Zealand Military Forces personnel of World War I
Euhedral and anhedral. Euhedral and anhedral are terms used to describe opposite properties in the formation of crystals.  Euhedral (also known as idiomorphic or automorphic) crystals
are those that are well-formed, with sharp, easily recognised faces. The opposite is anhedral (also known as xenomorphic or allotriomorphic), which describes rock with a  microstructure composed of mineral grains that have no well-formed crystal faces or cross-section shape in thin section. 

Anhedral crystal growth occurs in a competitive environment with no free space for the formation of crystal faces. An intermediate texture with some crystal face-formation is termed subhedral (also known as hypidiomorphic or hypautomorphic).

Crystals that grow from cooling liquid magma typically do not form smooth faces or sharp crystal outlines. As magma cools, the crystals grow and eventually touch each other, preventing crystal faces from forming properly or at all.

When snowflakes crystallize, they do not touch each other. Thus, snowflakes form euhedral, six-sided twinned crystals. In rocks, the presence of euhedral crystals may signify that they formed early in the crystallization of liquid magma or perhaps crystallized in a cavity or vug, without steric hindrance, or spatial restrictions, from other crystals.

Etymology

"Euhedral" is derived from the Greek eu meaning "well, good" and hedron meaning a seat or a face of a solid. “Anhedral” derives from the Greek “an”, meaning “not” or “without”.

Relation of face orientation to structure

Euhedral crystals have flat faces with sharp angles. The flat faces (also called facets) are oriented in a specific way relative to the underlying atomic arrangement of the crystal: They are planes of relatively low Miller index. This occurs because some surface orientations are more stable than others (lower surface energy). As a crystal grows, new atoms attach easily to the rougher and less stable parts of the surface, but less easily to the flat, stable surfaces. Therefore, the flat surfaces tend to grow larger and smoother, until the whole crystal surface consists of these plane surfaces. (See diagram.)

See also
 Xenomorph (geology)
 Crystal habit
 Rock microstructure
 List of rock textures

Notes

References

 
 

Crystallography
Mineral habits
Petrology
LED film. LED film, also called LED-embedded light film is a new technology of surface-mount light-emitting diodes (LEDs) on flexible transparent conductive polymer films. This technology is based on the use of a cold curing pick-and-place process on transparent conductive plastics.

Applications
Products such as LED-embedded glass and LED headliner are possible with this technology. Companies like Glassdecor realized projects with LED films for LED glass tables and big LED logos containing more than 600 LEDs. The LED film technology is usually used for glass products that have to be laminated for safety reasons, like laminated LED glass tables and LED glass logo doors.  
A similar technology uses conductive coating on glass, e.g., powerglass®. Glass with embedded LEDs is even also used for media façades. Balustrades have been realized in the airport of Dubai with powerglass.

Gallery

References

Light-emitting diodes
1964 in the environment. This is a list of notable events relating to the environment in 1964. They relate to environmental law, conservation, environmentalism and environmental issues.

Events

January
The United States Army Corps of Engineers built a dike around the Estelline Salt Springs which caused an increase in salinity, driving many species to extinction, including Hemigrapsus estellinensis and an undescribed barnacle.

April
Rachel Carson, author of the influential book Silent Spring, dies at the age of 56.

See also

Human impact on the environment

References