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Topic Review
Biography
Topic Review
Fundamentals of the Laser Ablation Method
The process of the pulsed-laser-induced quenching of liquid-solid interface reactions and pulsed laser evaporation to form composite films were then covered in depth, which provided a theoretical framework for the creation of new techniques for the synthesis of nanostructures. The laser irradiation process in a liquid environment, also known as laser ablation in liquid (LAL), can greatly improve ablation efficiency. The function of the liquids, such as water, involves heat transfer (conduction or convection) and bubble movement, which aids in the removal of the ablation particles that have been redeposited on the surface of the material and inhibits the fragmentation of chip oxidation. In addition, the liquid environment effectively cools the targets, preventing excessive heat buildup. Therefore, LAL can be widely used in laser cleaning and laser shock peening.
654
29 Nov 2022
Topic Review
Mini Clubman
The Mini Clubman is a supermini engineered and manufactured by BMW and sold under the Mini marque. The first-generation Clubman was introduced in 2007, as a variant of the Mini Hatch (Hardtop in the US). A commercial version called Clubvan was added to the range in 2012. The current second-generation model is produced since 2015 and available with front- and all-wheel drive.
1.4K
29 Nov 2022
Topic Review
Ground Based Strategic Deterrent
The Ground Based Strategic Deterrent (GBSD) is a future American land-based intercontinental ballistic missile system (ICBM) currently in the early stages of development. It is slated to replace the aging Minuteman III missiles, currently stationed in North Dakota, Wyoming, Montana, Nebraska and Colorado, from 2029 through 2075. In 2020, under the Trump administration, the Department of the Air Force gave the defense contractor, Northrop Grumman, a $13.3 billion sole-source contract for development of the GBSD after Boeing withdrew its proposal. Northrop Grumman's subcontractors on the GBSD include Lockheed Martin, General Dynamics, Bechtel, Honeywell, Aerojet Rocketdyne, Parsons, Textron and others.
528
28 Nov 2022
Topic Review
AFVG
AFVG (standing for Anglo-French Variable Geometry) was a 1960s project for supersonic multi-role combat aircraft with a variable-geometry wing,[N 1] jointly developed by British Aircraft Corporation in the United Kingdom and Dassault Aviation of France. The project was borne out of ambitions to produce a viable combat aircraft that made use of the variable-sweep wing, as well as to promote wider cooperative efforts between France and the United Kingdom. However, neither Dassault not the French Air Force were particularly keen on the AFVG; the project was further impacted by repeated specification changes and indecision for what roles that the AFVG was to be tasked with on the part of Britain. In mid-1967, British requirements settled upon adopting the AFVG for the Royal Air Force (RAF) for the strike role in the place of the cancelled BAC TSR-2 strike bomber. The project was cancelled in June 1967, when the French Government withdrew from participation. However, the cancellation was not the end of work on the proposed design. BAC modified the specification to solely satisfy Royal Air Force (RAF) needs, reconfiguring the design as the UKVG and sought out new partners to procure the aircraft, which ultimately emerged as the Anglo-German-Italian consortium-funded MRCA (Panavia Tornado), a variable-geometry wing fighter/strike aircraft.
618
28 Nov 2022
Topic Review
Capital Centre
The Capital Centre (later USAir Arena and US Airways Arena) was an indoor arena in the eastern United States, located in Landover, Maryland, east of Washington, D.C. Opened in late 1973, it closed in 1999, and was demolished in 2002. The seating capacity was 18,756 for basketball and 18,130 for hockey. The elevation at street level was approximately 160 feet (50 m) above sea level. The U.S. Census Bureau defined the land, later occupied by The Boulevard at the Capital Centre, as being in the Mitchellville census-designated place as of the 1990 U.S. Census, while in the 2000 U.S. Census the area was placed in the Lake Arbor CDP.
2.1K
28 Nov 2022
Topic Review
Honda Civic Hybrid
The Honda Civic Hybrid is a variation of the Honda Civic with a hybrid electric powertrain. Honda introduced the Civic Hybrid in Japan in December 2001 and discontinued it in 2015. In the United States, it was the first hybrid automobile to be certified as an Advanced Technology Partial Zero-Emissions Vehicle (AT-PZEV) from the California Air Resources Board (CARB). The Civic Hybrid uses an Integrated Motor Assist hybrid system similar to that of the Honda Insight. The Civic Hybrid was only marketed in sedan configurations.
6.8K
28 Nov 2022
Topic Review
L-Twin
A V-twin engine, also called a V2 engine, is a two-cylinder piston engine where the cylinders share a common crankshaft and are arranged in a V configuration. Although widely associated with motorcycles (installed either transversely or longitudinally), V-twin engines have also been used for industrial engines and in several small cars. The V-twin design dates back to the late 1880s.
2.5K
28 Nov 2022
Topic Review
Orphan Train
The Orphan Train Movement was a supervised welfare program that transported orphaned and homeless children from crowded Eastern cities of the United States to foster homes located largely in rural areas of the Midwest. The orphan trains operated between 1854 and 1929, relocating about 200,000 orphaned, abandoned, or homeless children. Three charitable institutions, Children's billage (founded 1851 by 24 philanthropists), the Children's Aid Society (established 1853 by Charles Loring Brace) and later, the New York Foundling Hospital, endeavored to help these children. The institutions were supported by wealthy donors and operated by professional staff. The two institutions developed a program that placed homeless, orphaned, and abandoned city children, who numbered an estimated 30,000 in New York City alone in the 1850s, in foster homes throughout the country. The children were transported to their new homes on trains that were labeled "orphan trains" or "baby trains". This relocation of children ended in the 1920s with the beginning of organized foster care in America.
1.3K
28 Nov 2022
Topic Review
Major Losses in Wheat Combine Harvester Operation
Wheat harvesting is one of the most important links in the whole wheat production process. In China, the wheat planting areas are wide, and the patterns are diversified. In addition, the problem of harvest losses caused by the numerous brands and low performance of domestic combine harvesters has always existed. Any losses during harvesting will result in less income for the farmers.
1.8K
28 Nov 2022
Topic Review
Broadcast Programming
Television scheduling strategies are employed to give programs the best possible chance of attracting and retaining an audience. They are used to deliver programs to audiences when they are most likely to want to watch them and deliver audiences to advertisers in the composition that makes their advertising most likely to be effective. Digitally based broadcast programming mechanisms are known as electronic program guides (EPG). At a micro level, scheduling is the minute planning of the transmission; what to broadcast and when, ensuring an adequate or maximum utilization of airtime.
8.0K
28 Nov 2022
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