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Hace 10 horas · High-speed rail (HSR) is a type of rail transport network utilizing trains that run significantly faster than those of traditional rail, using an integrated system of specialized rolling stock and dedicated tracks.While there is no single standard that applies worldwide, lines built to handle speeds above 250 km/h (155 mph) or upgraded lines in excess of 200 km/h (125 mph) are widely ...
Hace 10 horas · 7.—. (1) It shall be the duty of the responsible person to provide to every scaffold erector involved in the construction, erection, installation, re-positioning, alteration, maintenance, repair or dismantling of any scaffold in a workplace —. sufficient and secured anchorage by means of an independent life line or other equally effective ...
Hace 10 horas · To face this issue, in previous works the authors investigated the possibility of reducing costs by coupling the signal by means of elements already installed in MV networks. A patented solution was based on the exploitation of capacitive dividers of voltage detective systems (VDSs) normally installed in MV switchgears of distribution network's substations.
Hace 1 día · Enzymes (/ ˈ ɛ n z aɪ m z /) are proteins that act as biological catalysts by accelerating chemical reactions.The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.Almost all metabolic processes in the cell need enzyme catalysis in order to occur at rates fast enough to sustain life.
Hace 10 horas · The nondestructive inspection of components by means of guided waves is an emerging technology in fields like aerospace or pipeline construction and maintenance. The guided waves' capability of propagating many meters in a structure is utilized for swift inspection tasks as well as structural health monitoring. The German Aerospace Center uses Lamb waves for the quality assurance of large ...
