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Topic Review
Boeing CST-100 Starliner
The Boeing Starliner (CST-100 - Crew Space Transportation-100) is a crew capsule manufactured by Boeing as its participation in NASA's Commercial Crew Development (CCDev) program. Its primary purpose is to transport crew to the International Space Station (ISS) and to private space stations such as the proposed Bigelow Aerospace Commercial Space Station. The capsule has a diameter of 4.56 meters (15.0 ft), which is slightly larger than the Apollo command module and smaller than the Orion capsule. The Boeing Starliner is to support larger crews of up to seven people and is being designed to be able to remain in-orbit for up to seven months with reusability of up to ten missions. It is designed to be compatible with four launch vehicles: Atlas V, Delta IV, Falcon 9, and Vulcan. In the first phase of its CCDev program NASA awarded Boeing US$18 million in 2010 for preliminary development of the spacecraft. In the second phase Boeing was awarded a $93 million contract in 2011 for further spacecraft development. On 3 August 2012, NASA announced the award of $460 million to Boeing to continue work on the CST-100 under the Commercial Crew Integrated Capability (CCiCap) Program. On 16 September 2014, NASA selected the Boeing CST-100, along with SpaceX's Crew Dragon, for the Commercial Crew Transportation Capability (CCtCap) program, with an award of $4.2 billion. On 30 July 2019, NASA had no specific dates for Commercial Crew launches, stating that this was under review pending a leadership change. The Boeing Starliner Orbital Flight Test (uncrewed test flight) launched with the Atlas V N22, on 20 December 2019 from SLC-41 at Cape Canaveral Air Force Station , Florida. During the test, the Starliner experienced an anomaly that precluded a docking with the International Space Station. Two days after launch, on 22 December 2019 at 07:58 EST (12:58 UTC), with the successful landing at White Sands, New Mexico, the Boeing Starliner Calypso became the first-ever, crew-capable space capsule to make a land-based touchdown in the United States.
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Biography
Shahid Khan
Shahid Khan (Urdu: شاہد خان‎; born July 18, 1950),[1][2] also known as Shad Khan, is a Pakistani-American billionaire businessman and philanthropist. He is the owner of the Jacksonville Jaguars of the National Football League (NFL) and Fulham F.C. of the English Premier League. Khan is also the owner of the automobile parts manufacturer Flex-N-Gate in Urbana, Illinois. Khan was feature
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Biography
Robert Curbeam
Robert Lee Curbeam, Jr. (born March 5, 1962) is a former NASA astronaut and captain in the United States Navy.[1] Curbeam graduated from Woodlawn High School, Baltimore County, Maryland in 1980. He earned a Bachelor of Science degree in Aerospace Engineering from the United States Naval Academy in 1984, a Master of Science degree in Aeronautical Engineering from the Naval Postgraduate School in
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Topic Review
Fiber to the Premises by Country
This article lists the deployment of fiber to the premises, fiber to the home and fiber to the building by country.
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Topic Review
Solar Thermal for Process Heating
To mitigate the consequences of climate change, there is an increasing need to minimize the usage of fossil fuels, especially in the industrial sector because the majority of the industrial sector primarily rely on fossil fuels to meet their needs for heat energy, and a practical strategy to reduce reliance on fossil fuels is to use energy from the sun.
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Topic Review
Steam-Powered Vessels
Steam-powered vessels include steamboats and steamships. Smaller steamboats were developed first. They were replaced by larger steamships which were often ocean-going. Steamships required a change in propulsion technology from sail to paddlewheel to screw to steam turbines. The latter innovation changed the design of vessels to one that could move faster through the water. Engine propulsion changed to steam turbine in the early 20th century. In the latter part of the 20th century, these, in turn, were replaced by gas turbines. Steamship generally refers to larger steam-powered ships, usually ocean-going, capable of carrying a (ship's) boat. The SS Humboldt engine room, to the right, is a concept drawing during the construction of the ship. The term steam wheeler is archaic and rarely used. In England, "steam packet", after its sailing predecessor, was the usual term; even "steam barge" could be used (Steam tonnage in Lloyd's Register exceeded sailing ships tonnage by 1865). The French transatlantic steamer SS La Touraine was probably the last of her type to be equipped with sails, although she never used them. Steamships in turn were overtaken by diesel-driven ships in the second half of the 20th century. Most warships used steam propulsion from the 1860s until the late 20th century
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Topic Review
TGV Track Construction
LGV construction is the process by which the land on which TGV trains are to run is prepared for their use, involving carving the trackbed and laying the track. It is similar to the building of standard railway lines, but there are differences. In particular, construction process is more precise in order for the track to be suitable for regular use at 300 km/h (186 mph). The quality of construction was put to the test in particular during the TGV world speed record runs on the LGV Atlantique; the track was used at over 500 km/h (310 mph) without suffering significant damage. This contrasts with previous French world rail speed record (326/331 km/h in 1955) attempts which resulted in severe deformation of the track.
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Topic Review
Current Virtual Inertia Topologies
The use of power electronic inverters leads to the dissociation of sources and loads and lowering the power system inertia. Under power imbalance, this drop causes an elevated rate of change in frequency and frequency divergences, which has a notable impact on the system’s frequency stability. As a result, enhanced control techniques for grid-tied electronic converters are required to secure the power system’s stability and support. The virtual-synchronous generator (VSG) control is used to mimic the dynamics of a rotating synchronous generator and improve the power system’s stability.
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Topic Review
Radio Broadcasting
Radio broadcasting is transmission by radio waves intended to reach a wide audience. Stations can be linked in radio networks to broadcast a common radio format, either in broadcast syndication or simulcast or both. Alternatives to terrestrial radio broadcasting include cable radio, local wire television networks, satellite radio, and internet radio via streaming media on the Internet. The signal types can be either analog audio or digital audio.
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Topic Review
Solar Reactor Technologies Developed for Redox Cycles
New sustainable and alternative energy carriers are required to limit the CO2 emissions and climate change arising from intensive fossil fuel utilization and combustion. The solar thermochemical production of synthetic fuels without greenhouse gas emission can be achieved via the splitting of H2O and CO2, using concentrated solar energy as an external high-temperature heat source for the chemical process. Two main solar reactor concepts can be proposed to implement redox cycles.
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