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Biography
Philip G. Hubbard
Philip Gamaliel Hubbard, (March 4, 1921 - January 10, 2002) was a university professor and administrator who was the first African-American faculty member at the University of Iowa, the first African-American administrator at any of Iowa's state universities and the first African-American vice president at a Big 10 university. In August 2012 Hubbard was inducted into the Iowa African American Ha
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  • 16 Dec 2022
Biography
Rex Buren Beisel
Rex Buren Beisel (October 24, 1893 – January 26, 1972) was an American aeronautical engineer and pioneer in the science and industry of aviation. He was the lead designer of several successful military and civilian aircraft, but is best known for designing the Second World War-era Vought F4U Corsair fighter plane. Beisel was born on October 24, 1893, in San Jose, California,[1] and was rais
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  • 16 Dec 2022
Biography
Ami Argand
François-Pierre-Amédée Argand, known as Ami Argand (5 July 1750 – 14[1] or 24 October 1803[2]) was a Genevan physicist and chemist. He invented the Argand lamp, a great improvement on the traditional oil lamp.[3] Francois-Pierre-Amédée Argand was born in Geneva, Switzerland, the ninth of ten children. His father was a watchmaker, who intended for him to enter the clergy. However, he ha
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  • 01 Dec 2022
Topic Review
Industrial Fan
Industrial fans and blowers are machines whose primary function is to provide and accommodate a large flow of air or gas to various parts of a building or other structures. This is achieved by rotating a number of blades, connected to a hub and shaft, and driven by a motor or turbine. The flow rates of these mechanical fans range from approximately 200 cubic feet (5.7 m3) to 2,000,000 cubic feet (57,000 m3) per minute. A blower is another name for a fan that operates where the resistance to the flow is primarily on the downstream side of the fan.
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  • 11 Nov 2022
Topic Review
Distance Measuring Equipment (Aviation)
In aviation, distance measuring equipment (DME) is a radio navigation technology that measures the slant range (distance) between an aircraft and a ground station by timing the propagation delay of radio signals in the frequency band between 960 and 1215 megahertz (MHz). Line-of-visibility between the aircraft and ground station is required. An interrogator (airborne) initiates an exchange by transmitting a pulse pair, on an assigned 'channel', to the transponder ground station. The channel assignment specifies the carrier frequency and the spacing between the pulses. After a known delay, the transponder replies by transmitting a pulse pair on a frequency that is offset from the interrogation frequency by 63 MHz and having specified separation. DME systems are used worldwide, using standards set by the International Civil Aviation Organization (ICAO), RTCA, the European Union Aviation Safety Agency (EASA) and other bodies. Some countries require that aircraft operating under instrument flight rules (IFR) be equipped with a DME interrogator; in others, a DME interrogator is only required for conducting certain operations. While stand-alone DME transponders are permitted, DME transponders are usually paired with an azimuth guidance system to provide aircraft with a two-dimensional navigation capability. A common combination is a DME colocated with a VHF omnidirectional range (VOR) transmitter in a single ground station. When this occurs, the frequencies of the VOR and DME equipment are paired. Such a configuration enables an aircraft to determine its azimuth angle and distance from the station. A VORTAC (a VOR co-located with a TACAN) installation provides the same capabilities to civil aircraft but also provides 2-D navigation capabilities to military aircraft. Low-power DME transponders are also associated with some instrument landing system (ILS), ILS localizer and microwave landing system (MLS) installations. In those situations, the DME transponder frequency/pulse spacing is also paired with the ILS, LOC or MLS frequency. ICAO characterizes DME transmissions as ultra high frequency (UHF). The term L-band is also used. Developed in Australia, DME was invented by James "Gerry" Gerrand under the supervision of Edward George "Taffy" Bowen while employed as Chief of the Division of Radiophysics of the Commonwealth Scientific and Industrial Research Organisation (CSIRO). Another engineered version of the system was deployed by Amalgamated Wireless Australasia Limited in the early 1950s operating in the 200 MHz VHF band. This Australian domestic version was referred to by the Federal Department of Civil Aviation as DME(D) (or DME Domestic), and the later international version adopted by ICAO as DME(I). DME is similar in principle to secondary radar ranging function, except the roles of the equipment in the aircraft and on the ground are reversed. DME was a post-war development based on the identification friend or foe (IFF) systems of World War II. To maintain compatibility, DME is functionally identical to the distance measuring component of TACAN.
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  • 14 Oct 2022
Topic Review
Diagnosis Application of MINI and BERT
Researchers propose a mental health diagnosis application for Arabic-speaking patients using both The MINI-International Neuropsychiatric Interview (MINI) and the supervised machine learning BERT model to equip the psychiatry department of the Military Hospital of Instruction of Tunis with a rapid and intelligent tool handling the high number of patients treated every day.
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  • 29 Jan 2022
Biography
Leonard Greene
Leonard Michael Greene (June 8, 1918 – November 30, 2006) was an American inventor and aerodynamics engineer who held more than 200 patents, many of which are aviation-related. He is most well known for his contributions to aviation technology, including his invention, the Aircraft Stall Warning device, which warns pilots when a deadly aerodynamic stall is imminent. To build the device, Greene
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  • 29 Dec 2022
Biography
Johnny Key
Johnny R. Key (born December 9, 1968), is an engineer and the owner of two outlets of the Open Arms Learning Center, Inc., in Mountain Home in Baxter County in northwestern Arkansas, who is a Republican former member of the Arkansas State Senate. Key represented District 17, which includes all of Baxter and Marion counties and the eastern half of Boone County. Key was term-limited and ineligible
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  • 29 Dec 2022
Topic Review
Polymer-Based Additive Manufacturing
Numerous publications are available in relation to several strategies for Design for Additive Manufacturing (DfAM). Achieving a very high degree of complexity and detail in a final product has become a possibility that has led to the restructuring and diversification of design ideas. With the additional freedom in the design workspace, there are supplementary design considerations/limitations as well for additively manufactured forms and optimising these provide the best outcome for specific design needs.
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  • 09 Oct 2021
Topic Review
Electrically Tunable Phase Gratings
Electrically tunable phase gratings are able to steer an incoming light beam without employing movable parts. Here, we present the design and implementation of a 2D beam steering device by cascading two orthogonal 1D liquid crystal (LC) based phase gratings, each having an array of 72 rectangular individually controlled pixels and driven by a custom 12-bit Pulse-Width Modulation (PWM) electrical driver.
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  • 01 Jul 2021
Topic Review
HTV-1
HTV-1, also known as the HTV Demonstration Flight or HTV Technical Demonstration Vehicle, was the first Japanese Space Agency (JAXA) H-II Transfer Vehicle, launched in September 2009 to resupply the International Space Station and support the JAXA Kibō module (きぼう, Kibō, Hope) or Japanese Experiment Module (JEM). It was an uncrewed cargo spacecraft carrying a mixture of pressurised and unpressurised cargo to the International Space Station. After a 52-day successful mission, HTV departed the ISS on 31 October 2009 after being released by the station's robotic arm. The spacecraft re-entered in the atmosphere of Earth on 1 November 2009 and disintegrated on re-entry as planned.
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  • 26 Oct 2022
Topic Review
Overland Train
In the 1950s, LeTourneau Inc. developed several overland trains, essentially oversized semi-trailer trucks that could travel over almost any terrain. Their intention was to be able to handle logistics needs without being dependent on local road or rail systems, allowing them to operate in back-country areas. The US Army had three experimental units built, the largest reaching almost 600 feet (183 m) long, which holds the record for the longest off-road vehicle. Road trains are in use in certain roles today, but the US Army examples and a few derivatives appear to be the only off-road examples built.
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  • 02 Dec 2022
Biography
Tadeusz Sendzimir
Tadeusz Sendzimir (originally Sędzimir,[1] July 15, 1894, Lwów – September 1, 1989, Jupiter, Florida[2]) of Ostoja coat of arms was a Poland engineer and inventor of international renown with 120 patents in mining and metallurgy, 73 of which were awarded to him in the United States.[3] His name has been given to revolutionary methods of processing steel and metals used in every industrializ
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  • 09 Dec 2022
Topic Review
RMX (Operating System)
iRMX is a real-time operating system designed specifically for use with the Intel 8080 and 8086 family of processors. It is an acronym for Real-time Multitasking eXecutive.
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  • 06 Dec 2022
Topic Review
List of Gliders (K)
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.
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  • 29 Sep 2022
Topic Review
OmniGo 700LX Communicator Plus
The HP 200LX Palmtop PC (F1060A, F1061A, F1216A), also known as project Felix, is a personal digital assistant introduced by Hewlett-Packard in August 1994. It was often called a Palmtop PC, and it was notable that it was, with some minor exceptions, a MS-DOS-compatible computer in a palmtop format, complete with a monochrome graphic display, QWERTY keyboard, serial port, and PCMCIA expansion slot.
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  • 24 Oct 2022
Topic Review
Compaq Portable Series
Compaq's first computers' form factors were portable, also called "luggables", and then "lunchbox computers", and together constituted the Compaq Portable series. These computers measured approximately 1 by 1 foot (0.30 m × 0.30 m) on the side, and were approximately 2 1⁄2 feet (0.76 m) wide. As the products evolved, laptops and notebooks were created offing a new level of portability that caused the market to explode. Some of the portables, the Portable and Portable II, had CRT monitors, while later the Portable III and the Portable 386) had flat, monochrome, usually amber, plasma displays. The portables came/could come with internal hard disk drives on .5" shock mount springs; diskette drives, usually 5​1⁄4" double- or quadruple-density drives; batteries; and/or a dual-ISA expansion chassis, about one full-drive-height wide. Note this was before the term "ISA" became a standard. The Compaq Portable 486 included mono and color LCD screens and were battery powered.
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  • 27 Oct 2022
Biography
Nathan M. Newmark
Nathan Mortimore Newmark (September 22, 1910 – January 25, 1981) was an American structural engineer and academic, who is widely considered as one of the founding fathers of Earthquake Engineering. He was awarded the National Medal of Science for engineering. Newmark was born in Plainfield, New Jersey to Abraham and Mollie Newmark. After receiving his early education in North Carolina and N
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  • 28 Nov 2022
Topic Review
Nanomaterials and Cross-Cutting Technologies
The electrochemical biosensor is defined as a chemical sensor constituted of a recognition element and an electrochemical transducer, in which the device is able to transform the biochemical information related to the interaction of the analyte with the recognition element into an electrochemically detectable signal.
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  • 23 Feb 2021
Biography
Donna Cameron
Donna Cameron (born April 7, 1951) is an United States multimedia artist, scholar and inventor. She is best known for the invention of cinematic paper-emulsion film (CPE), for which she was issued a U.S. patent in 2001.[1] Her CPE multimedia films, photography and videos are represented in the permanent collection of The Museum of Modern Art, New York City .[2] Cameron was born in Mishawaka,
  • 1.0K
  • 07 Dec 2022
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