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Seated military shoulder press. The overhead press, also known as the shoulder press, strict press or military press, is an upper-body weight training exercise in which the trainee presses a weight overhead while seated or standing. It is mainly used to develop the anterior deltoid muscles of the shoulder. [1]
The generic term used by the International Union of Railways for the technology is overhead line. [1] It is known variously as overhead catenary, overhead contact line (OCL), overhead contact system (OCS), overhead equipment (OHE), overhead line equipment (OLE or OHLE), overhead lines (OHL), overhead wiring (OHW), traction wire, and trolley wire.
A chain hanging from points forms a catenary. The silk on a spider's web forming multiple elastic catenaries.. In physics and geometry, a catenary (US: / ˈ k æ t ən ɛr i / KAT-ən-err-ee, UK: / k ə ˈ t iː n ər i / kə-TEE-nər-ee) is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends in a uniform gravitational field.
Overhead insulated cables are rarely used, usually for short distances (less than a kilometer). Insulated cables can be directly fastened to structures without insulating supports. An overhead line with bare conductors insulated by air is typically less costly than a cable with insulated conductors. A more common approach is "covered" line wire.
Catenary along the Deseret Power Railroad. The Deseret Power Railroad (reporting mark DPRW), formerly known as the Deseret-Western Railway, is an isolated short line between Colorado and Utah which hauls coal from Deserado Mine to Bonanza Power Plant. It was built in 1983 and opened on January 4, 1984. Electrification is at 50 kv AC overhead wire.
Cable pull-down exercise to the front with a medium-width overhand (pronated) grip. The pull-down exercise is a strength training exercise designed to develop the latissimus dorsi muscle. It performs the functions of downward rotation and depression of the scapulae combined with adduction and extension of the shoulder joint.
The push press is used to help develop shoulder strength. It can be used to push past a sticking point or develop power for the Clean and Jerk (though 'pressing' is illegal in competition). The ability to drive from the legs and through the torso to the arms is important for sports (this is also found in the bench press).
The parabola represents the profile of the cable of a suspended-deck suspension bridge on which its cable and hangers have negligible mass compared to its deck. The very lightest bridges of this type consist of a single footrope and nothing more. These are tightropes and slacklines, and require skill to use. More commonly, the footrope is ...