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Tube riding at Teahupo'o . Tube riding is a term used by surfers to describe riding well inside the curve or barrel of a finely-shaped breaking wave. Under the right conditions, waves in some areas, such as the Banzai Pipeline in Hawaii, form a moving "tube" or cylinder as they break. The most straightforward way to tube ride is by body surfing ...
A vactrain (or vacuum tube train) is a proposed design for very-high-speed rail transportation. It is a maglev (magnetic levitation) line using partly evacuated tubes or tunnels. Reduced air resistance could permit vactrains to travel at very high ( hypersonic ) speeds with relatively little power—up to 6,400–8,000 km/h (4,000–5,000 mph).
TI Group plc (formerly "Tube Investments") was a holding company for specialised engineering companies. It was based in Abingdon, Oxfordshire and was listed on the London Stock Exchange, at one point being a constituent of the FTSE 100 Index.
It is the History Channel's first and longest-running program, for over 30 years. It focuses on science, history, technology, electronics, mechanics, engineering, architecture, industry, mass production, manufacturing, and agriculture. It also hosted on History2, and currently also hosts on Story Television.
For some tube bending processing, a mandrel is placed inside the tube to prevent collapsing. The tube is held in tension by a wiper die to prevent any creasing during stress. A wiper die is usually made of a softer alloy such as aluminum or brass to avoid scratching or damaging the material being bent.
Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.
Deep level underground is construction that is 20 m (66 ft) or more below ground and not using the cut-and-cover method, especially train stations, air raid shelters and bunkers, and some tunnels and mines. Cut-and-cover is a simple method of construction for shallow tunnels where a trench is excavated and roofed over with an overhead support ...
By 1963, a new structural system of framed tubes had appeared in skyscraper design and construction. Fazlur Rahman Khan, a structural engineer from Bangladesh (then called East Pakistan) who worked at Skidmore, Owings & Merrill, defined the framed tube structure as "a three dimensional space structure composed of three, four, or possibly more frames, braced frames, or shear walls, joined at or ...