background:   elevator-related accidents are uncommon, but can cause significant injury. however, little data exist on these types of accidents. to compile and analyze accident data involving elevators in an effort to eliminate or at least significantly reduce such accidents. methods: in this retrospective study we investigated 1,819 cases of elevator-related accidents during a four-year period...

Background:   Elevator-related accidents are uncommon, but can cause significant injury. However, little data exist on these types of accidents. To compile and analyze accident data involving elevators in an effort to eliminate or at least significantly reduce such accidents. Methods: In this retrospective study we investigated 1,819 cases of elevator-related accidents during a four-year period...

Abstract For the traction driven elevator, satisfaction of conditions is basic guarantee for normal operation elevator. If force insufficient, there will be skid, slip and other phenomena, which not only cannot meet design requirements elevator manufacturers, but also easy to cause safety accidents. The equivalent friction coefficient f (depending on groove shape, material lubrication) wrap ang...

A mine shaft is the lifeline to underground mines. Mine operators depend on safe, uninterrupted, and efficient movement of workers and materials. The shaft and hoisting system provides access to the network of openings used to recover the underground resource, provides vertical transport of miners and materials, and serves as an escapeway in case of an emergency. Accidents involving hoisting ca...

In 2000, the accident rate for escalator riding was about 0.815 accidents per million passenger trips through Taipei Metro Rapid Transit (MRT) heavy capacity stations. In order to reduce the probability and severity of escalator riding accidents and enhance the safety of passengers, the Drury and Brill model [Drury, C.G., Brill, M., 1983. Human factors in consumer product accident investigation...

one of the increasingly important organizational considerations involves occupational health and staff safety. hence, it is crucial for the managers to identify the key organizational factors contributing to reduce work-related accidents. this study was conducted on 340 workers, employees, experts, supervisors, directors, and managers. the data evaluation involved a questionnaire while the anal...

We present a constraint programming formulation for the elevator trip origin-destination matrix estimation problem, and study different deterministic and randomized algorithms to solve the problem. An elevator trip consists of successive stops in one direction of travel with passengers inside the elevator. It can be defined as a directed network, where the nodes correspond to the stops on the t...

To plan efficient future PCS networks, indoor environments as well as outdoor environments must be considered. Users typically exhibit vertical motion through elevators and horizontal motion on building floors in indoor environments. A user on the way into or out of an elevator may experience difficulty in communicating with a base station (BS) due to large signal attenuation caused by the meta...

An apparatus and method for providing an elevator door performance result of an elevator door in an elevator door system which normally operates sequentially from state-to-state in a closed loop sequential chain of normal operating states is disclosed. A plurality of parameter signals provided by the elevator door system is monitored by the apparatus. The apparatus comprises: a door state seque...

We present a constraint programming formulation for the elevator trip origin-destination matrix estimation problem using a lexicographic bi-criteria optimization method where least squares minimization is applied to the measured counts and the minimum information or the maximum entropy approach to the whole matrix. An elevator trip consists of successive stops in one direction of travel with pa...