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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.
  • 435
  • 06 Dec 2022
Topic Review
Embraer Legacy 500
The Embraer Legacy 500/450 (EMB-550/EMB-545) are Brazilian mid-size business jets launched by Embraer in April 2008, the first of their size with a flat-floor stand-up cabin and fly-by-wire. The longer 500, which typically carries 4 passengers over 3,125 nmi (5,790 km) with room for up to 12, first flew on November 27, 2012, and was certified on August 12, 2014. The shorter 450 first flew on December 28, 2013, was certified on August 11, 2015, carries 4 passengers over 2,900 nmi (5,370 km) and can accommodate up to 9.
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Topic Review
List of Soviet Manned Space Missions
This is a list of the manned space missions conducted by the Soviet space programme. These missions belong to the Vostok, Voskhod, and Soyuz space programs. Note: Soviet manned space missions had not any official patches before Apollo–Soyuz program. After that and until Soyuz TM-12 "Juno" flight mission patches had been designed only for international missions.
  • 548
  • 06 Dec 2022
Topic Review
Audio-Based Hazard Detection for Construction Safety
Safety-critical sounds at job sites play an essential role in construction safety, but hearing capability is often declined due to the use of hearing protection and the complicated nature of construction noise. Thus, preserving or augmenting the auditory situational awareness of construction workers has become a critical need. 
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  • 06 Dec 2022
Topic Review
Double-Barreled Shotgun
A double-barreled shotgun is a break-action shotgun with two parallel barrels, allowing two single shots to be fired in quick succession.
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  • 06 Dec 2022
Biography
William Boeing
William Edward Boeing (/ˈboʊɪŋ/; October 1, 1881 – September 28, 1956) was an United States aviation pioneer who founded The Boeing Company in 1916. Boeing was born in Detroit, Michigan to Marie M. Ortmann, from Vienna, Austria, and Wilhelm Böing (1846–1890) from Hagen-Hohenlimburg, Germany.[1] From a successful family, Wilhelm Böing emigrated to the United States in 1868 and initia
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  • 05 Dec 2022
Topic Review
Squeeze Flow for Welding Plastics
Squeeze flow (also called squeezing flow, squeezing film flow, or squeeze flow theory) is a type of flow in which a material is pressed out or deformed between two parallel plates or objects. First explored in 1874 by Josef Stefan, squeeze flow describes the outward movement of a droplet of material, its area of contact with the plate surfaces, and the effects of internal and external factors such as temperature, viscoelasticity, and heterogeneity of the material. Several squeeze flow models exist to describe Newtonian and non-Newtonian fluids undergoing squeeze flow under various geometries and conditions. Numerous applications across scientific and engineering disciplines including rheometry, welding engineering, and materials science provide examples of squeeze flow in practical use.
  • 605
  • 05 Dec 2022
Topic Review
Apple Cinema Display
The Apple Cinema Display is a line of flat-panel computer monitors developed and sold by Apple Inc. between 1999 and 2011. It was initially sold alongside the older line of Studio Displays, but eventually replaced them. Apple offered 20-, 22-, 23-, 24-, 27- and 30-inch sizes, with the last model being a 27-inch size with LED backlighting. There have been three designs for the Cinema Display, one featuring polycarbonate plastic and two featuring anodized aluminum. The first displays were designed to match the colorful plastic of the Power Mac G3 and later the Power Mac G4, while the second revisions were designed to match the aluminum aesthetics of the Power Mac G5 and PowerBook G4. The last available design matched the unibody laptops released in October 2008. The Apple Cinema Display name was retired in July 2011 with the introduction of the Apple Thunderbolt Display, and the Cinema Display models were no longer offered on the Apple Store website as of August 2014.
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  • 05 Dec 2022
Topic Review
M2 Browning
The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning. Its design is similar to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge. The M2 uses the much larger and much more powerful .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for Browning Machine Gun). It has been referred to as "Ma Deuce", in reference to its M2 nomenclature. The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft. The Browning .50 caliber machine gun has been used extensively as a vehicle weapon and for aircraft armament by the United States from the 1930s to the present. It was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, the Soviet–Afghan War, the Gulf War, the Iraq War and the War in Afghanistan in the 2000s and 2010s. It is the primary heavy machine gun of NATO countries, and has been used by many other countries as well. The M2 has been in use longer than any other firearm in U.S. inventory except the .45 ACP M1911 pistol, also designed by John Browning. The current M2HB is manufactured in the U.S. by General Dynamics and U.S. Ordnance for use by the U.S. government, and for allies via Foreign Military Sales, as well as foreign manufacturers such as FN Herstal.
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  • 05 Dec 2022
Topic Review
Properties and Applications of Geopolymer Mortar
Classic cement mortar is often utilised as a standard binding and repairing material in various engineering structures. Many scholars have addressed GPM’s viability and potential applications as a suitable replacement for regular cement mortar. Sathonsaowaphak was the first to investigate geopolymer mortar and studied the properties of bottom ash fineness, ash/liquid alkali ratio, NaOH/Na2SiO3 ratio, NaOH dosage, water to ash ratio, and superplasticiser on the behaviour in terms of workability and compressive strength of GPM. Geopolymer mortar has a mechanical strength of 24–58 MPa, and adding NaOH solution improves the workability performance of GPM without reducing strength. According to the results of Detphan and Chindaprasirt, who prepared GPC using rice husk ash and fly ash and activated by NaOH and NaSiO3 solution as a liquid for the mix, they found that the maximum strength of GPM is acquired by employing a Na2SiO3-to-NaOH mass ratio of four. Moreover, more discussion about geopolymer mortar properties is reported in the following Content.
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