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Topic Review
Bücker Bü 131
The Bücker Bü 131 "Jungmann" (freshman, young man) was a German 1930s basic training aircraft which was used by the Luftwaffe during World War II.
  • 767
  • 03 Nov 2022
Biography
David E. Pergrin
Colonel David E. Pergrin (26 July 1917 – 7 April 2012) was commanding officer of the 291st Engineer Combat Battalion of the United States Army during World War II. Before the war he earned an engineering degree at Pennsylvania State University, graduating in 1940. While at Penn State he participated in the ROTC program. In addition, Pergrin played on the university's football team, was elected
  • 765
  • 29 Dec 2022
Biography
William Donald Scherzer
William Donald Scherzer (January 27, 1858 – July 20, 1893) was an American engineer who invented the rolling lift bridge. Scherzer's parents were William and Wilhelmina Scherzer, who immigrated from Germany in 1847.[1] Scherzer was born in Peru, Illinois on January 27, 1858 as the second son in a family of three sons and one daughter.[1] Scherzer received his primary education in publi
  • 764
  • 13 Dec 2022
Biography
Quentin Dastugue
Quentin D. Dastugue (born December 31, 1955) is a founding partner and the chief executive officer of the New Orleans-based real estate firm Property One, Inc., and a former four-term member of the Louisiana House of Representatives. Dastugue (pronounced DAS TOOG) was elected as a Democrat to the state House in 1979 and 1983 as the District 82 representative for suburban Jefferson Parish. In 198
  • 764
  • 30 Dec 2022
Biography
Christopher Chenery
Christopher Tompkins Chenery (September 19, 1886 – January 3, 1973) was an American engineer, businessman, and the owner/breeder of record for Thoroughbred horse racing's U.S. Triple Crown champion Secretariat. Chenery, the son of Ida and James Chenery, was born in Richmond and raised in Ashland, Virginia.[1] He had three brothers, William Ludlow Chenery, who became editor of Collier's Wee
  • 759
  • 29 Dec 2022
Topic Review
Nanocellulose Based Nanocomposites for Sustainable Applications
Nanocellulose is used in a variety of fields, including medicine, packaging, cosmetics, electronics, food, automotive, optical materials, aerospace, and other fields. Among its distinctive features are its hygroscopicity and chemical inactivity. Nanocellulose could also be used in a variety of industries due to its lack of high sorption and toxicity.
  • 756
  • 25 Oct 2022
Topic Review
List of Gliders (D)
This is a list of gliders/sailplanes of the world, (this reference lists all gliders with references, where available) Note: Any aircraft can glide for a short time, but gliders are designed to glide for longer.
  • 755
  • 04 Nov 2022
Biography
Leslie E. Robertson
Leslie Earl Robertson (born February 12, 1928) is an American engineer. He was the lead structural engineer of the Twin Towers of the original World Trade Center in New York City .[1] He has since been structural engineer on numerous other projects, including the Shanghai World Financial Center and the Bank of China Tower in Hong Kong. Robertson's engineering career began in 1952, when he gra
  • 754
  • 27 Dec 2022
Biography
William H.C. Whiting
William Henry Chase Whiting (March 22, 1824 – March 10, 1865) was a United States Army officer who resigned after 16 years of service in the Army Corps of Engineers to serve in the Confederate States Army during the American Civil War. He was wounded at the Second Battle of Fort Fisher by a musket ball to his leg, and died in prison camp on March 10, 1865, of dysentery. William Whiting was
  • 753
  • 23 Nov 2022
Topic Review
Analog Synthesizer
An analog (or analogue) synthesizer is a synthesizer that uses analog circuits and analog signals to generate sound electronically. The earliest analog synthesizers in the 1920s and 1930s, such as the Trautonium, were built with a variety of vacuum-tube (thermionic valve) and electro-mechanical technologies. After the 1960s, analog synthesizers were built using operational amplifier (op-amp) integrated circuits, and used potentiometers (pots, or variable resistors) to adjust the sound parameters. Analog synthesizers also use low-pass filters and high-pass filters to modify the sound. While 1960s-era analog synthesizers such as the Moog used a number of independent electronic modules connected by patch cables, later analog synthesizers such as the Minimoog integrated them into single units, eliminating patch cords in favour of integrated signal routing systems.
  • 752
  • 09 Oct 2022
Topic Review
Reticle
A reticle, or reticule also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections. Today, engraved lines or embedded fibers may be replaced by a digital image superimposed on a screen or eyepiece. Both terms may be used to describe any set of patterns used for aiding visual measurements and calibrations, but in modern use reticle is most commonly used for weapon sights, while graticule is more widely used for non-weapon measuring instruments such as oscilloscope display, astronomic telescopes, microscopes and slides, surveying instruments and other similar devices. There are many variations of reticle pattern; this article concerns itself mainly with the most rudimentary reticle: the crosshair. Crosshairs are typically represented as a pair of perpendicularly intersecting lines in the shape of a cross, "+", though many variations of additional features exist including dots, posts, concentric circles/horseshoes, chevrons, graduated markings, or a combination of above. Most commonly associated with telescopic sights for aiming firearms, crosshairs are also common in optical instruments used for astronomy and surveying, and are also popular in graphical user interfaces as a precision pointer. The reticle is said to have been invented by Robert Hooke, and dates to the 17th century. Another candidate as inventor is the amateur astronomer William Gascoigne, who predated Hooke.
  • 749
  • 14 Oct 2022
Topic Review
OPALS
Optical PAyload for Lasercomm Science (OPALS) is a spacecraft communication instrument developed at the Jet Propulsion Laboratory that was tested on the International Space Station (ISS) from 18 April 2014 to 17 July 2014 to demonstrate the technology for laser communications systems between spacecraft and ground stations. The purpose of OPALS is to do research into replacing traditional radio-frequency (RF) communications which are currently used on spacecraft. This will allow spacecraft to increase the rate at which data is downlinked by 10 to 100 times. It also will have less error than RF communication. It launched from Cape Canaveral Air Force Station to the ISS on 18 April 2014 on a Falcon 9 SpaceX CRS-3 Dragon capsule resupply.
  • 749
  • 20 Nov 2022
Biography
Jeong H. Kim
Jeong Hun Kim (Korean: 김종훈; born August 13, 1960) is a South Korean-born American academic, businessman, and entrepreneur in the technology industry. He served as the President of Bell Labs from 2005 to 2013. Born in Seoul, South Korea, Jeong Kim is a product of a broken home. His parents divorced when he was very young, and he was raised by different relatives while his father went to
  • 749
  • 29 Nov 2022
Topic Review
Osa (Handgun)
The ПБ-4 «ОСА» (EN:PB-4 Osa, Russian for "wasp"), is a family of Russian non-lethal pistols that can be also used as flare gun, flashbang gun, or starting pistol. The system consists of the pistol (2-4 cartridges, laser target pointer, electronic ignition capsule), and various ammunition types. Osa was developed in the 1990s by engineer-constructor and weapon designer G.A. Bideev (Г.А. Бидеев). It was designed and is manufactured by the state-owned organizations Federal Center for Research and Manufacturing and The Institute for Science and Research in the Applied Chemistry. The pistol is available in the civilian market.
  • 748
  • 14 Nov 2022
Topic Review
Archery Games
These novelty forms of archery are generally regarded as amusements, and, as such, are not governed by organizationally-sanctioned rules.
  • 747
  • 04 Nov 2022
Topic Review
Tesla Turbine
The Tesla turbine is a bladeless centripetal flow turbine patented by Nikola Tesla in 1913. It is referred to as a bladeless turbine. The Tesla turbine is also known as the boundary-layer turbine, cohesion-type turbine, and Prandtl-layer turbine (after Ludwig Prandtl) because it uses the boundary-layer effect and not a fluid impinging upon the blades as in a conventional turbine. Bioengineering researchers have referred to it as a multiple-disk centrifugal pump. One of Tesla's desires for implementation of this turbine was for geothermal power, which was described in Our Future Motive Power.
  • 744
  • 10 Oct 2022
Topic Review
LightScribe
LightScribe is an optical disc recording technology that was created by the Hewlett-Packard Company. It uses specially coated recordable CD and DVD media to produce laser-etched labels with text or graphics, as opposed to stick-on labels and printable discs. Although HP is no longer developing the technology, it is still maintained and supported by a number of independent enthusiasts. The LightScribe method uses the laser in a way similar to when plain data are written to the disc; a greyscale image of the label is etched (physically burned) onto the upper side of the disc using a laser. In the beginning, the discs were available only in a sepia color but later became available in many monochromatic colors. The purpose of LightScribe is to allow users to create direct-to-disc labels (as opposed to stick-on labels), using their optical disc writer. Special discs and a compatible disc writer are required. Before or after burning data to the read-side of the disc, the user turns the disc over and inserts it with the label side down. The drive's laser then burns the label side in such a way that an image is produced. (see Thermal printing; LightScribe uses a laser instead of a thermal printing head)
  • 744
  • 12 Oct 2022
Topic Review
Post-office Box
A post-office box or post office box (commonly referred to as a P.O. box or a postal box) is a uniquely addressable lockable box located on the premises of a post office station. In some regions, particularly in Africa, there is no 'door to door' delivery of mail, for example, in Kenya. Consequently, renting a PO box has traditionally been the only way to receive mail in such countries. However, some, like Jordan, have introduced mail home delivery. Generally, post office boxes are rented from the post office either by individuals or by businesses on a basis ranging from monthly to annual, and the cost of rent varies depending on the box size. Central business district (CBD) PO boxes are usually more expensive than rural PO boxes. In the United States, the rental rate used to be uniform across the country. Now, however, a postal facility can be in any of seven fee groups by location; in addition, certain customers qualify for free box rental, usually because the Postal Service does not offer carrier-route delivery to their physical addresses. In the United Kingdom, Royal Mail PO boxes are often little more than pigeon-holes in the secure section of a sorting office and are accessible only by staff. In such cases, the renter of the PO box will be issued with a card showing the PO box number and delivery office name and must produce this to the desk staff when collecting mail. For an additional fee, the Royal Mail will deliver received items to the renter's geographical address. Some private companies (e.g., United Parcel Service (UPS) and commercial mail receiving agencies) also offer similar services of renting a mailbox in a public location. The difference with an official PO box is that mail sent there is addressed to a street address (along with the box number), instead of just addressed to "PO Box CSX".
  • 743
  • 08 Oct 2022
Biography
Dora Dougherty Strother
Dr. Dora Jean Dougherty Strother (also known as Dora Dougherty McKeown and/or Dora Strother McKeown; November 27, 1921 – November 19, 2013),[1][2] was best known as a Woman Airforce Service Pilots (WASP) and B-29 Superfortress demonstration pilot. She was a U.S. military pilot, human factors engineer with Bell Aircraft, instructor at the University of Illinois and helicopter test pilot for Bel
  • 742
  • 01 Dec 2022
Topic Review
Live, Virtual, and Constructive
Live, Virtual, & Constructive (LVC) Simulation is a broadly used taxonomy for classifying Models and Simulation (M&S). However, categorizing a simulation as a live, virtual, or constructive environment is problematic since there is no clear division between these categories. The degree of human participation in a simulation is infinitely variable, as is the degree of equipment realism. The categorization of simulations also lacks a category for simulated people working real equipment.
  • 741
  • 02 Dec 2022
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