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Topic Review
3D-Printed Fiber-Reinforced Polymer Composites by Fused Deposition Modelling
Fiber reinforced polymer composites (FRPC) can be manufactured by Fused deposition modeling. An introduction to FRPC and the types of fibers used in producing FRPC are summarised in this article.  
  • 613
  • 22 Nov 2022
Topic Review
Astrophotography
Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, modern astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum photons over these long periods of time. Photography using extended exposure-times revolutionized the field of professional astronomical research, recording hundreds of thousands of new stars, and nebulae invisible to the human eye. Specialized and ever-larger optical telescopes were constructed as essentially big cameras to record images on photographic plates. Astrophotography had an early role in sky surveys and star classification but over time it has given way to more sophisticated equipment and techniques designed for specific fields of scientific research, with image sensors becoming just one of many forms of sensor. Today, astrophotography is mostly a subdiscipline in amateur astronomy, usually seeking aesthetically pleasing images rather than scientific data. Amateurs use a wide range of special equipment and techniques.
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  • 22 Nov 2022
Topic Review
Timeline of STS-51-L
STS-51-L mission timeline is a detailed timeline of events from the ignition of Challenger's main engines to the remote destruction of the two Solid rocket boosters (SRBs), and includes a transcript of crew conversations from the cockpit voice recorder on board the orbiter. STS-51-L was the twenty-fifth flight in the American Space Shuttle program, and marked the first time a civilian had flown aboard the Space Shuttle. The mission used Space Shuttle Challenger, which lifted off from launch pad 39B (LC-39B) on January 28, 1986, from Kennedy Space Center, Florida. The mission ended in disaster following the destruction of Challenger 73 seconds after lift-off, because of the failure of an O-ring seals on Challenger's right solid rocket booster, which led to the rapid disintegration of the Space Shuttle stack from overwhelming aerodynamic pressures. The seven-member crew was killed when the crew compartment hit the Atlantic Ocean at 333 km/h (207 mph), after two and a half minutes of freefall.
  • 502
  • 22 Nov 2022
Topic Review
DC-BUS
DC-BUS is technology for reliable and economical communication over noisy DC or AC power lines. The DC-BUS was originally developed by Yamar Electronics Ltd. together with the DC-BUS Alliance, for low cost sub-networks in vehicles, using the battery lines for in-vehicle data communication. The DC-BUS converts the digital input data into phase modulated signals, protected against errors generated by noise over the powerline. On the receiving side, the received signal is demodulated into the original digital data. Gradually it became a popular means of communication in a plurality of applications within aerospace, automotive, solar energy management and lighting. It is also used as an alternative to RS-232 and RS-485 networks in some cases. The common goal for all these applications is reducing wires, saving space, lowering cost and increasing reliability.
  • 1.8K
  • 22 Nov 2022
Biography
John Glenn
Colonel John Herschel Glenn Jr. (July 18, 1921 – December 8, 2016) was a United States Marine Corps aviator, engineer, astronaut, businessman, and politician. He was the first American to orbit the Earth, circling it three times in 1962. Following his retirement from NASA, he served from 1974 to 1999 as a Democratic United States Senator from Ohio. Before joining NASA, Glenn was a distinguis
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  • 22 Nov 2022
Biography
Burt Rutan
Elbert Leander "Burt" Rutan (born June 17, 1943) is a retired American aerospace engineer and entrepreneur noted for his originality in designing light, strong, unusual-looking, energy-efficient aircraft. He designed the record-breaking Voyager, which in 1986 was the first plane to fly around the world without stopping or refueling, and the sub-orbital spaceplane SpaceShipOne, which won the Ansa
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  • 22 Nov 2022
Topic Review
Caisson (Engineering)
In geotechnical engineering, a caisson (/ˈkeɪsən/ or /ˈkeɪsɒn/) is a watertight retaining structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the water can be pumped out, keeping the working environment dry. When piers are being built using an open caisson, and it is not practical to reach suitable soil, friction pilings may be driven to form a suitable sub-foundation. These piles are connected by a foundation pad upon which the column pier is erected.
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  • 22 Nov 2022
Biography
Gustav Otto
Gustav Otto (12 January 1883 – 28 February 1926) was a German aircraft and aircraft engine designer and manufacturer. Gustav was born in Cologne to Nikolaus August Otto, the founder of N. A. Otto & Cie. and inventor of the four-stroke internal combustion engine. It is therefore regarded that his interest in engines, specifically aircraft and the manufacture thereof, was something he inherited
  • 1.3K
  • 22 Nov 2022
Topic Review
APRHF Rail Rangers
APRHF Rail Rangers is one of several affiliates of the American Passenger Rail Heritage Foundation (APRHF), a 501(c)(3) non-profit organization whose mission is to preserve and promote the role that passenger rail played in the building of the United States of America. Interpretive Guides with APRHF Rail Rangers provide educational interpretive programs on-board the South Shore Line between Chicago and South Bend, private rail excursions, group rail charters, and at various railroad museums and train shows. The organization is operated out of the APRHF Headquarters in La Plata, Missouri, however most guides live in the Chicago area. Most APRHF Rail Rangers excursions and outreach events take place in the Upper Midwest, including in Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, and Wisconsin.
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  • 22 Nov 2022
Biography
Raymix
Edmundo Gómez Moreno (born 17 February 1991), better known by his stage name Raymix, is a Mexican musician and aerospace engineer. Nicknamed El Rey de la Electrocumbia, Raymix started his music career in the early 2010s, when he joined a trance project called Light & Wave with two other Mexican musicians. Their song "Feeling the City" was featured on the Armin van Buuren radio show A State of T
  • 1.1K
  • 22 Nov 2022
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